start integrating windows port

git-svn-id: svn+q:///qpdf/trunk@757 71b93d88-0707-0410-a8cf-f5a4172ac649

115 files changed, 66928 insertions, 0 deletions

diff --git a/external-libs/pcre/AUTHORS b/external-libs/pcre/AUTHORS
new file mode 100644
index 00000000..622ba1c9
--- /dev/null
+++ b/external-libs/pcre/AUTHORS
@@ -0,0 +1,6 @@
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+University of Cambridge Computing Service,
+Cambridge, England. Phone: +44 1223 334714.
+
+Copyright (c) 1997-2003 University of Cambridge
diff --git a/external-libs/pcre/Abuild.conf b/external-libs/pcre/Abuild.conf
new file mode 100755
index 00000000..7c356f81
--- /dev/null
+++ b/external-libs/pcre/Abuild.conf
@@ -0,0 +1,5 @@
+name: pcre

+platform-types: native

+child-dirs: dftables

+deps: dftables

+

diff --git a/external-libs/pcre/Abuild.interface b/external-libs/pcre/Abuild.interface
new file mode 100755
index 00000000..80f7d1b1
--- /dev/null
+++ b/external-libs/pcre/Abuild.interface
@@ -0,0 +1,3 @@
+INCLUDES = .

+LIBDIRS = $(ABUILD_OUTPUT_DIR)

+LIBS = pcre

diff --git a/external-libs/pcre/Abuild.mk b/external-libs/pcre/Abuild.mk
new file mode 100755
index 00000000..4dd1b1c9
--- /dev/null
+++ b/external-libs/pcre/Abuild.mk
@@ -0,0 +1,8 @@
+TARGETS_lib := pcre

+SRCS_lib_pcre := maketables.c get.c study.c pcre.c

+RULES := ccxx

+

+pcre.$(OBJ): chartables.c

+

+chartables.c: $(DFTABLES_DIR)/$(call binname,dftables)

+	./$(DFTABLES_DIR)/dftables chartables.c

diff --git a/external-libs/pcre/COPYING b/external-libs/pcre/COPYING
new file mode 100644
index 00000000..09a242c1
--- /dev/null
+++ b/external-libs/pcre/COPYING
@@ -0,0 +1,54 @@
+PCRE LICENCE
+------------
+
+PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+University of Cambridge Computing Service,
+Cambridge, England. Phone: +44 1223 334714.
+
+Copyright (c) 1997-2003 University of Cambridge
+
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission. In practice, this means that if you use
+   PCRE in software that you distribute to others, commercially or
+   otherwise, you must put a sentence like this
+
+     Regular expression support is provided by the PCRE library package,
+     which is open source software, written by Philip Hazel, and copyright
+     by the University of Cambridge, England.
+
+   somewhere reasonably visible in your documentation and in any relevant
+   files or online help data or similar. A reference to the ftp site for
+   the source, that is, to
+
+     ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
+
+   should also be given in the documentation. However, this condition is not
+   intended to apply to whole chains of software. If package A includes PCRE,
+   it must acknowledge it, but if package B is software that includes package
+   A, the condition is not imposed on package B (unless it uses PCRE
+   independently).
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), or Lesser General Purpose Licence (LGPL),
+   then the terms of that licence shall supersede any condition above with
+   which it is incompatible.
+
+The documentation for PCRE, supplied in the "doc" directory, is distributed
+under the same terms as the software itself.
+
+End
diff --git a/external-libs/pcre/ChangeLog b/external-libs/pcre/ChangeLog
new file mode 100644
index 00000000..edc4aea4
--- /dev/null
+++ b/external-libs/pcre/ChangeLog
@@ -0,0 +1,1475 @@
+ChangeLog for PCRE
+------------------
+
+Version 4.5 01-Dec-03
+---------------------
+
+ 1. There has been some re-arrangement of the code for the match() function so
+    that it can be compiled in a version that does not call itself recursively.
+    Instead, it keeps those local variables that need separate instances for
+    each "recursion" in a frame on the heap, and gets/frees frames whenever it
+    needs to "recurse". Keeping track of where control must go is done by means
+    of setjmp/longjmp. The whole thing is implemented by a set of macros that
+    hide most of the details from the main code, and operates only if
+    NO_RECURSE is defined while compiling pcre.c. If PCRE is built using the
+    "configure" mechanism, "--disable-stack-for-recursion" turns on this way of
+    operating.
+
+    To make it easier for callers to provide specially tailored get/free
+    functions for this usage, two new functions, pcre_stack_malloc, and
+    pcre_stack_free, are used. They are always called in strict stacking order,
+    and the size of block requested is always the same.
+
+    The PCRE_CONFIG_STACKRECURSE info parameter can be used to find out whether
+    PCRE has been compiled to use the stack or the heap for recursion. The
+    -C option of pcretest uses this to show which version is compiled.
+
+    A new data escape \S, is added to pcretest; it causes the amounts of store
+    obtained and freed by both kinds of malloc/free at match time to be added
+    to the output.
+
+ 2. Changed the locale test to use "fr_FR" instead of "fr" because that's
+    what's available on my current Linux desktop machine.
+
+ 3. When matching a UTF-8 string, the test for a valid string at the start has
+    been extended. If start_offset is not zero, PCRE now checks that it points
+    to a byte that is the start of a UTF-8 character. If not, it returns
+    PCRE_ERROR_BADUTF8_OFFSET (-11). Note: the whole string is still checked;
+    this is necessary because there may be backward assertions in the pattern.
+    When matching the same subject several times, it may save resources to use
+    PCRE_NO_UTF8_CHECK on all but the first call if the string is long.
+
+ 4. The code for checking the validity of UTF-8 strings has been tightened so
+    that it rejects (a) strings containing 0xfe or 0xff bytes and (b) strings
+    containing "overlong sequences".
+
+ 5. Fixed a bug (appearing twice) that I could not find any way of exploiting!
+    I had written "if ((digitab[*p++] && chtab_digit) == 0)" where the "&&"
+    should have been "&", but it just so happened that all the cases this let
+    through by mistake were picked up later in the function.
+
+ 6. I had used a variable called "isblank" - this is a C99 function, causing
+    some compilers to warn. To avoid this, I renamed it (as "blankclass").
+
+ 7. Cosmetic: (a) only output another newline at the end of pcretest if it is
+    prompting; (b) run "./pcretest /dev/null" at the start of the test script
+    so the version is shown; (c) stop "make test" echoing "./RunTest".
+
+ 8. Added patches from David Burgess to enable PCRE to run on EBCDIC systems.
+
+ 9. The prototype for memmove() for systems that don't have it was using
+    size_t, but the inclusion of the header that defines size_t was later. I've
+    moved the #includes for the C headers earlier to avoid this.
+
+10. Added some adjustments to the code to make it easier to compiler on certain
+    special systems:
+
+      (a) Some "const" qualifiers were missing.
+      (b) Added the macro EXPORT before all exported functions; by default this
+          is defined to be empty.
+      (c) Changed the dftables auxiliary program (that builds chartables.c) so
+          that it reads its output file name as an argument instead of writing
+          to the standard output and assuming this can be redirected.
+
+11. In UTF-8 mode, if a recursive reference (e.g. (?1)) followed a character
+    class containing characters with values greater than 255, PCRE compilation
+    went into a loop.
+
+12. A recursive reference to a subpattern that was within another subpattern
+    that had a minimum quantifier of zero caused PCRE to crash. For example,
+    (x(y(?2))z)? provoked this bug with a subject that got as far as the
+    recursion. If the recursively-called subpattern itself had a zero repeat,
+    that was OK.
+
+13. In pcretest, the buffer for reading a data line was set at 30K, but the
+    buffer into which it was copied (for escape processing) was still set at
+    1024, so long lines caused crashes.
+
+14. A pattern such as /[ab]{1,3}+/ failed to compile, giving the error
+    "internal error: code overflow...". This applied to any character class
+    that was followed by a possessive quantifier.
+
+15. Modified the Makefile to add libpcre.la as a prerequisite for
+    libpcreposix.la because I was told this is needed for a parallel build to
+    work.
+
+16. If a pattern that contained .* following optional items at the start was
+    studied, the wrong optimizing data was generated, leading to matching
+    errors. For example, studying /[ab]*.*c/ concluded, erroneously, that any
+    matching string must start with a or b or c. The correct conclusion for
+    this pattern is that a match can start with any character.
+
+
+Version 4.4 13-Aug-03
+---------------------
+
+ 1. In UTF-8 mode, a character class containing characters with values between
+    127 and 255 was not handled correctly if the compiled pattern was studied.
+    In fixing this, I have also improved the studying algorithm for such
+    classes (slightly).
+
+ 2. Three internal functions had redundant arguments passed to them. Removal
+    might give a very teeny performance improvement.
+
+ 3. Documentation bug: the value of the capture_top field in a callout is *one
+    more than* the number of the hightest numbered captured substring.
+
+ 4. The Makefile linked pcretest and pcregrep with -lpcre, which could result
+    in incorrectly linking with a previously installed version. They now link
+    explicitly with libpcre.la.
+
+ 5. configure.in no longer needs to recognize Cygwin specially.
+
+ 6. A problem in pcre.in for Windows platforms is fixed.
+
+ 7. If a pattern was successfully studied, and the -d (or /D) flag was given to
+    pcretest, it used to include the size of the study block as part of its
+    output. Unfortunately, the structure contains a field that has a different
+    size on different hardware architectures. This meant that the tests that
+    showed this size failed. As the block is currently always of a fixed size,
+    this information isn't actually particularly useful in pcretest output, so
+    I have just removed it.
+
+ 8. Three pre-processor statements accidentally did not start in column 1.
+    Sadly, there are *still* compilers around that complain, even though
+    standard C has not required this for well over a decade. Sigh.
+
+ 9. In pcretest, the code for checking callouts passed small integers in the
+    callout_data field, which is a void * field. However, some picky compilers
+    complained about the casts involved for this on 64-bit systems. Now
+    pcretest passes the address of the small integer instead, which should get
+    rid of the warnings.
+
+10. By default, when in UTF-8 mode, PCRE now checks for valid UTF-8 strings at
+    both compile and run time, and gives an error if an invalid UTF-8 sequence
+    is found. There is a option for disabling this check in cases where the
+    string is known to be correct and/or the maximum performance is wanted.
+
+11. In response to a bug report, I changed one line in Makefile.in from
+
+        -Wl,--out-implib,.libs/lib@WIN_PREFIX@pcreposix.dll.a \
+    to
+        -Wl,--out-implib,.libs/@WIN_PREFIX@libpcreposix.dll.a \
+
+    to look similar to other lines, but I have no way of telling whether this
+    is the right thing to do, as I do not use Windows. No doubt I'll get told
+    if it's wrong...
+
+
+Version 4.3 21-May-03
+---------------------
+
+1. Two instances of @WIN_PREFIX@ omitted from the Windows targets in the
+   Makefile.
+
+2. Some refactoring to improve the quality of the code:
+
+   (i)   The utf8_table... variables are now declared "const".
+
+   (ii)  The code for \cx, which used the "case flipping" table to upper case
+         lower case letters, now just substracts 32. This is ASCII-specific,
+         but the whole concept of \cx is ASCII-specific, so it seems
+         reasonable.
+
+   (iii) PCRE was using its character types table to recognize decimal and
+         hexadecimal digits in the pattern. This is silly, because it handles
+         only 0-9, a-f, and A-F, but the character types table is locale-
+         specific, which means strange things might happen. A private
+         table is now used for this - though it costs 256 bytes, a table is
+         much faster than multiple explicit tests. Of course, the standard
+         character types table is still used for matching digits in subject
+         strings against \d.
+
+   (iv)  Strictly, the identifier ESC_t is reserved by POSIX (all identifiers
+         ending in _t are). So I've renamed it as ESC_tee.
+
+3. The first argument for regexec() in the POSIX wrapper should have been
+   defined as "const".
+
+4. Changed pcretest to use malloc() for its buffers so that they can be
+   Electric Fenced for debugging.
+
+5. There were several places in the code where, in UTF-8 mode, PCRE would try
+   to read one or more bytes before the start of the subject string. Often this
+   had no effect on PCRE's behaviour, but in some circumstances it could
+   provoke a segmentation fault.
+
+6. A lookbehind at the start of a pattern in UTF-8 mode could also cause PCRE
+   to try to read one or more bytes before the start of the subject string.
+
+7. A lookbehind in a pattern matched in non-UTF-8 mode on a PCRE compiled with
+   UTF-8 support could misbehave in various ways if the subject string
+   contained bytes with the 0x80 bit set and the 0x40 bit unset in a lookbehind
+   area. (PCRE was not checking for the UTF-8 mode flag, and trying to move
+   back over UTF-8 characters.)
+
+
+Version 4.2 14-Apr-03
+---------------------
+
+1. Typo "#if SUPPORT_UTF8" instead of "#ifdef SUPPORT_UTF8" fixed.
+
+2. Changes to the building process, supplied by Ronald Landheer-Cieslak
+     [ON_WINDOWS]: new variable, "#" on non-Windows platforms
+     [NOT_ON_WINDOWS]: new variable, "#" on Windows platforms
+     [WIN_PREFIX]: new variable, "cyg" for Cygwin
+     * Makefile.in: use autoconf substitution for OBJEXT, EXEEXT, BUILD_OBJEXT
+       and BUILD_EXEEXT
+     Note: automatic setting of the BUILD variables is not yet working
+     set CPPFLAGS and BUILD_CPPFLAGS (but don't use yet) - should be used at
+       compile-time but not at link-time
+     [LINK]: use for linking executables only
+     make different versions for Windows and non-Windows
+     [LINKLIB]: new variable, copy of UNIX-style LINK, used for linking
+       libraries
+     [LINK_FOR_BUILD]: new variable
+     [OBJEXT]: use throughout
+     [EXEEXT]: use throughout
+     <winshared>: new target
+     <wininstall>: new target
+     <dftables.o>: use native compiler
+     <dftables>: use native linker
+     <install>: handle Windows platform correctly
+     <clean>: ditto
+     <check>: ditto
+     copy DLL to top builddir before testing
+
+   As part of these changes, -no-undefined was removed again. This was reported
+   to give trouble on HP-UX 11.0, so getting rid of it seems like a good idea
+   in any case.
+
+3. Some tidies to get rid of compiler warnings:
+
+   . In the match_data structure, match_limit was an unsigned long int, whereas
+     match_call_count was an int. I've made them both unsigned long ints.
+
+   . In pcretest the fact that a const uschar * doesn't automatically cast to
+     a void * provoked a warning.
+
+   . Turning on some more compiler warnings threw up some "shadow" variables
+     and a few more missing casts.
+
+4. If PCRE was complied with UTF-8 support, but called without the PCRE_UTF8
+   option, a class that contained a single character with a value between 128
+   and 255 (e.g. /[\xFF]/) caused PCRE to crash.
+
+5. If PCRE was compiled with UTF-8 support, but called without the PCRE_UTF8
+   option, a class that contained several characters, but with at least one
+   whose value was between 128 and 255 caused PCRE to crash.
+
+
+Version 4.1 12-Mar-03
+---------------------
+
+1. Compiling with gcc -pedantic found a couple of places where casts were
+needed, and a string in dftables.c that was longer than standard compilers are
+required to support.
+
+2. Compiling with Sun's compiler found a few more places where the code could
+be tidied up in order to avoid warnings.
+
+3. The variables for cross-compiling were called HOST_CC and HOST_CFLAGS; the
+first of these names is deprecated in the latest Autoconf in favour of the name
+CC_FOR_BUILD, because "host" is typically used to mean the system on which the
+compiled code will be run. I can't find a reference for HOST_CFLAGS, but by
+analogy I have changed it to CFLAGS_FOR_BUILD.
+
+4. Added -no-undefined to the linking command in the Makefile, because this is
+apparently helpful for Windows. To make it work, also added "-L. -lpcre" to the
+linking step for the pcreposix library.
+
+5. PCRE was failing to diagnose the case of two named groups with the same
+name.
+
+6. A problem with one of PCRE's optimizations was discovered. PCRE remembers a
+literal character that is needed in the subject for a match, and scans along to
+ensure that it is present before embarking on the full matching process. This
+saves time in cases of nested unlimited repeats that are never going to match.
+Problem: the scan can take a lot of time if the subject is very long (e.g.
+megabytes), thus penalizing straightforward matches. It is now done only if the
+amount of subject to be scanned is less than 1000 bytes.
+
+7. A lesser problem with the same optimization is that it was recording the
+first character of an anchored pattern as "needed", thus provoking a search
+right along the subject, even when the first match of the pattern was going to
+fail. The "needed" character is now not set for anchored patterns, unless it
+follows something in the pattern that is of non-fixed length. Thus, it still
+fulfils its original purpose of finding quick non-matches in cases of nested
+unlimited repeats, but isn't used for simple anchored patterns such as /^abc/.
+
+
+Version 4.0 17-Feb-03
+---------------------
+
+1. If a comment in an extended regex that started immediately after a meta-item
+extended to the end of string, PCRE compiled incorrect data. This could lead to
+all kinds of weird effects. Example: /#/ was bad; /()#/ was bad; /a#/ was not.
+
+2. Moved to autoconf 2.53 and libtool 1.4.2.
+
+3. Perl 5.8 no longer needs "use utf8" for doing UTF-8 things. Consequently,
+the special perltest8 script is no longer needed - all the tests can be run
+from a single perltest script.
+
+4. From 5.004, Perl has not included the VT character (0x0b) in the set defined
+by \s. It has now been removed in PCRE. This means it isn't recognized as
+whitespace in /x regexes too, which is the same as Perl. Note that the POSIX
+class [:space:] *does* include VT, thereby creating a mess.
+
+5. Added the class [:blank:] (a GNU extension from Perl 5.8) to match only
+space and tab.
+
+6. Perl 5.005 was a long time ago. It's time to amalgamate the tests that use
+its new features into the main test script, reducing the number of scripts.
+
+7. Perl 5.8 has changed the meaning of patterns like /a(?i)b/. Earlier versions
+were backward compatible, and made the (?i) apply to the whole pattern, as if
+/i were given. Now it behaves more logically, and applies the option setting
+only to what follows. PCRE has been changed to follow suit. However, if it
+finds options settings right at the start of the pattern, it extracts them into
+the global options, as before. Thus, they show up in the info data.
+
+8. Added support for the \Q...\E escape sequence. Characters in between are
+treated as literals. This is slightly different from Perl in that $ and @ are
+also handled as literals inside the quotes. In Perl, they will cause variable
+interpolation. Note the following examples:
+
+    Pattern            PCRE matches      Perl matches
+
+    \Qabc$xyz\E        abc$xyz           abc followed by the contents of $xyz
+    \Qabc\$xyz\E       abc\$xyz          abc\$xyz
+    \Qabc\E\$\Qxyz\E   abc$xyz           abc$xyz
+
+For compatibility with Perl, \Q...\E sequences are recognized inside character
+classes as well as outside them.
+
+9. Re-organized 3 code statements in pcretest to avoid "overflow in
+floating-point constant arithmetic" warnings from a Microsoft compiler. Added a
+(size_t) cast to one statement in pcretest and one in pcreposix to avoid
+signed/unsigned warnings.
+
+10. SunOS4 doesn't have strtoul(). This was used only for unpicking the -o
+option for pcretest, so I've replaced it by a simple function that does just
+that job.
+
+11. pcregrep was ending with code 0 instead of 2 for the commands "pcregrep" or
+"pcregrep -".
+
+12. Added "possessive quantifiers" ?+, *+, ++, and {,}+ which come from Sun's
+Java package. This provides some syntactic sugar for simple cases of what my
+documentation calls "once-only subpatterns". A pattern such as x*+ is the same
+as (?>x*). In other words, if what is inside (?>...) is just a single repeated
+item, you can use this simplified notation. Note that only makes sense with
+greedy quantifiers. Consequently, the use of the possessive quantifier forces
+greediness, whatever the setting of the PCRE_UNGREEDY option.
+
+13. A change of greediness default within a pattern was not taking effect at
+the current level for patterns like /(b+(?U)a+)/. It did apply to parenthesized
+subpatterns that followed. Patterns like /b+(?U)a+/ worked because the option
+was abstracted outside.
+
+14. PCRE now supports the \G assertion. It is true when the current matching
+position is at the start point of the match. This differs from \A when the
+starting offset is non-zero. Used with the /g option of pcretest (or similar
+code), it works in the same way as it does for Perl's /g option. If all
+alternatives of a regex begin with \G, the expression is anchored to the start
+match position, and the "anchored" flag is set in the compiled expression.
+
+15. Some bugs concerning the handling of certain option changes within patterns
+have been fixed. These applied to options other than (?ims). For example,
+"a(?x: b c )d" did not match "XabcdY" but did match "Xa b c dY". It should have
+been the other way round. Some of this was related to change 7 above.
+
+16. PCRE now gives errors for /[.x.]/ and /[=x=]/ as unsupported POSIX
+features, as Perl does. Previously, PCRE gave the warnings only for /[[.x.]]/
+and /[[=x=]]/. PCRE now also gives an error for /[:name:]/ because it supports
+POSIX classes only within a class (e.g. /[[:alpha:]]/).
+
+17. Added support for Perl's \C escape. This matches one byte, even in UTF8
+mode. Unlike ".", it always matches newline, whatever the setting of
+PCRE_DOTALL. However, PCRE does not permit \C to appear in lookbehind
+assertions. Perl allows it, but it doesn't (in general) work because it can't
+calculate the length of the lookbehind. At least, that's the case for Perl
+5.8.0 - I've been told they are going to document that it doesn't work in
+future.
+
+18. Added an error diagnosis for escapes that PCRE does not support: these are
+\L, \l, \N, \P, \p, \U, \u, and \X.
+
+19. Although correctly diagnosing a missing ']' in a character class, PCRE was
+reading past the end of the pattern in cases such as /[abcd/.
+
+20. PCRE was getting more memory than necessary for patterns with classes that
+contained both POSIX named classes and other characters, e.g. /[[:space:]abc/.
+
+21. Added some code, conditional on #ifdef VPCOMPAT, to make life easier for
+compiling PCRE for use with Virtual Pascal.
+
+22. Small fix to the Makefile to make it work properly if the build is done
+outside the source tree.
+
+23. Added a new extension: a condition to go with recursion. If a conditional
+subpattern starts with (?(R) the "true" branch is used if recursion has
+happened, whereas the "false" branch is used only at the top level.
+
+24. When there was a very long string of literal characters (over 255 bytes
+without UTF support, over 250 bytes with UTF support), the computation of how
+much memory was required could be incorrect, leading to segfaults or other
+strange effects.
+
+25. PCRE was incorrectly assuming anchoring (either to start of subject or to
+start of line for a non-DOTALL pattern) when a pattern started with (.*) and
+there was a subsequent back reference to those brackets. This meant that, for
+example, /(.*)\d+\1/ failed to match "abc123bc". Unfortunately, it isn't
+possible to check for precisely this case. All we can do is abandon the
+optimization if .* occurs inside capturing brackets when there are any back
+references whatsoever. (See below for a better fix that came later.)
+
+26. The handling of the optimization for finding the first character of a
+non-anchored pattern, and for finding a character that is required later in the
+match were failing in some cases. This didn't break the matching; it just
+failed to optimize when it could. The way this is done has been re-implemented.
+
+27. Fixed typo in error message for invalid (?R item (it said "(?p").
+
+28. Added a new feature that provides some of the functionality that Perl
+provides with (?{...}). The facility is termed a "callout". The way it is done
+in PCRE is for the caller to provide an optional function, by setting
+pcre_callout to its entry point. Like pcre_malloc and pcre_free, this is a
+global variable. By default it is unset, which disables all calling out. To get
+the function called, the regex must include (?C) at appropriate points. This
+is, in fact, equivalent to (?C0), and any number <= 255 may be given with (?C).
+This provides a means of identifying different callout points. When PCRE
+reaches such a point in the regex, if pcre_callout has been set, the external
+function is called. It is provided with data in a structure called
+pcre_callout_block, which is defined in pcre.h. If the function returns 0,
+matching continues; if it returns a non-zero value, the match at the current
+point fails. However, backtracking will occur if possible. [This was changed
+later and other features added - see item 49 below.]
+
+29. pcretest is upgraded to test the callout functionality. It provides a
+callout function that displays information. By default, it shows the start of
+the match and the current position in the text. There are some new data escapes
+to vary what happens:
+
+    \C+         in addition, show current contents of captured substrings
+    \C-         do not supply a callout function
+    \C!n        return 1 when callout number n is reached
+    \C!n!m      return 1 when callout number n is reached for the mth time
+
+30. If pcregrep was called with the -l option and just a single file name, it
+output "<stdin>" if a match was found, instead of the file name.
+
+31. Improve the efficiency of the POSIX API to PCRE. If the number of capturing
+slots is less than POSIX_MALLOC_THRESHOLD, use a block on the stack to pass to
+pcre_exec(). This saves a malloc/free per call. The default value of
+POSIX_MALLOC_THRESHOLD is 10; it can be changed by --with-posix-malloc-threshold
+when configuring.
+
+32. The default maximum size of a compiled pattern is 64K. There have been a
+few cases of people hitting this limit. The code now uses macros to handle the
+storing of links as offsets within the compiled pattern. It defaults to 2-byte
+links, but this can be changed to 3 or 4 bytes by --with-link-size when
+configuring. Tests 2 and 5 work only with 2-byte links because they output
+debugging information about compiled patterns.
+
+33. Internal code re-arrangements:
+
+(a) Moved the debugging function for printing out a compiled regex into
+    its own source file (printint.c) and used #include to pull it into
+    pcretest.c and, when DEBUG is defined, into pcre.c, instead of having two
+    separate copies.
+
+(b) Defined the list of op-code names for debugging as a macro in
+    internal.h so that it is next to the definition of the opcodes.
+
+(c) Defined a table of op-code lengths for simpler skipping along compiled
+    code. This is again a macro in internal.h so that it is next to the
+    definition of the opcodes.
+
+34. Added support for recursive calls to individual subpatterns, along the
+lines of Robin Houston's patch (but implemented somewhat differently).
+
+35. Further mods to the Makefile to help Win32. Also, added code to pcregrep to
+allow it to read and process whole directories in Win32. This code was
+contributed by Lionel Fourquaux; it has not been tested by me.
+
+36. Added support for named subpatterns. The Python syntax (?P<name>...) is
+used to name a group. Names consist of alphanumerics and underscores, and must
+be unique. Back references use the syntax (?P=name) and recursive calls use
+(?P>name) which is a PCRE extension to the Python extension. Groups still have
+numbers. The function pcre_fullinfo() can be used after compilation to extract
+a name/number map. There are three relevant calls:
+
+  PCRE_INFO_NAMEENTRYSIZE        yields the size of each entry in the map
+  PCRE_INFO_NAMECOUNT            yields the number of entries
+  PCRE_INFO_NAMETABLE            yields a pointer to the map.
+
+The map is a vector of fixed-size entries. The size of each entry depends on
+the length of the longest name used. The first two bytes of each entry are the
+group number, most significant byte first. There follows the corresponding
+name, zero terminated. The names are in alphabetical order.
+
+37. Make the maximum literal string in the compiled code 250 for the non-UTF-8
+case instead of 255. Making it the same both with and without UTF-8 support
+means that the same test output works with both.
+
+38. There was a case of malloc(0) in the POSIX testing code in pcretest. Avoid
+calling malloc() with a zero argument.
+
+39. Change 25 above had to resort to a heavy-handed test for the .* anchoring
+optimization. I've improved things by keeping a bitmap of backreferences with
+numbers 1-31 so that if .* occurs inside capturing brackets that are not in
+fact referenced, the optimization can be applied. It is unlikely that a
+relevant occurrence of .* (i.e. one which might indicate anchoring or forcing
+the match to follow \n) will appear inside brackets with a number greater than
+31, but if it does, any back reference > 31 suppresses the optimization.
+
+40. Added a new compile-time option PCRE_NO_AUTO_CAPTURE. This has the effect
+of disabling numbered capturing parentheses. Any opening parenthesis that is
+not followed by ? behaves as if it were followed by ?: but named parentheses
+can still be used for capturing (and they will acquire numbers in the usual
+way).
+
+41. Redesigned the return codes from the match() function into yes/no/error so
+that errors can be passed back from deep inside the nested calls. A malloc
+failure while inside a recursive subpattern call now causes the
+PCRE_ERROR_NOMEMORY return instead of quietly going wrong.
+
+42. It is now possible to set a limit on the number of times the match()
+function is called in a call to pcre_exec(). This facility makes it possible to
+limit the amount of recursion and backtracking, though not in a directly
+obvious way, because the match() function is used in a number of different
+circumstances. The count starts from zero for each position in the subject
+string (for non-anchored patterns). The default limit is, for compatibility, a
+large number, namely 10 000 000. You can change this in two ways:
+
+(a) When configuring PCRE before making, you can use --with-match-limit=n
+    to set a default value for the compiled library.
+
+(b) For each call to pcre_exec(), you can pass a pcre_extra block in which
+    a different value is set. See 45 below.
+
+If the limit is exceeded, pcre_exec() returns PCRE_ERROR_MATCHLIMIT.
+
+43. Added a new function pcre_config(int, void *) to enable run-time extraction
+of things that can be changed at compile time. The first argument specifies
+what is wanted and the second points to where the information is to be placed.
+The current list of available information is:
+
+  PCRE_CONFIG_UTF8
+
+The output is an integer that is set to one if UTF-8 support is available;
+otherwise it is set to zero.
+
+  PCRE_CONFIG_NEWLINE
+
+The output is an integer that it set to the value of the code that is used for
+newline. It is either LF (10) or CR (13).
+
+  PCRE_CONFIG_LINK_SIZE
+
+The output is an integer that contains the number of bytes used for internal
+linkage in compiled expressions. The value is 2, 3, or 4. See item 32 above.
+
+  PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+
+The output is an integer that contains the threshold above which the POSIX
+interface uses malloc() for output vectors. See item 31 above.
+
+  PCRE_CONFIG_MATCH_LIMIT
+
+The output is an unsigned integer that contains the default limit of the number
+of match() calls in a pcre_exec() execution. See 42 above.
+
+44. pcretest has been upgraded by the addition of the -C option. This causes it
+to extract all the available output from the new pcre_config() function, and to
+output it. The program then exits immediately.
+
+45. A need has arisen to pass over additional data with calls to pcre_exec() in
+order to support additional features. One way would have been to define
+pcre_exec2() (for example) with extra arguments, but this would not have been
+extensible, and would also have required all calls to the original function to
+be mapped to the new one. Instead, I have chosen to extend the mechanism that
+is used for passing in "extra" data from pcre_study().
+
+The pcre_extra structure is now exposed and defined in pcre.h. It currently
+contains the following fields:
+
+  flags         a bitmap indicating which of the following fields are set
+  study_data    opaque data from pcre_study()
+  match_limit   a way of specifying a limit on match() calls for a specific
+                  call to pcre_exec()
+  callout_data  data for callouts (see 49 below)
+
+The flag bits are also defined in pcre.h, and are
+
+  PCRE_EXTRA_STUDY_DATA
+  PCRE_EXTRA_MATCH_LIMIT
+  PCRE_EXTRA_CALLOUT_DATA
+
+The pcre_study() function now returns one of these new pcre_extra blocks, with
+the actual study data pointed to by the study_data field, and the
+PCRE_EXTRA_STUDY_DATA flag set. This can be passed directly to pcre_exec() as
+before. That is, this change is entirely upwards-compatible and requires no
+change to existing code.
+
+If you want to pass in additional data to pcre_exec(), you can either place it
+in a pcre_extra block provided by pcre_study(), or create your own pcre_extra
+block.
+
+46. pcretest has been extended to test the PCRE_EXTRA_MATCH_LIMIT feature. If a
+data string contains the escape sequence \M, pcretest calls pcre_exec() several
+times with different match limits, until it finds the minimum value needed for
+pcre_exec() to complete. The value is then output. This can be instructive; for
+most simple matches the number is quite small, but for pathological cases it
+gets very large very quickly.
+
+47. There's a new option for pcre_fullinfo() called PCRE_INFO_STUDYSIZE. It
+returns the size of the data block pointed to by the study_data field in a
+pcre_extra block, that is, the value that was passed as the argument to
+pcre_malloc() when PCRE was getting memory in which to place the information
+created by pcre_study(). The fourth argument should point to a size_t variable.
+pcretest has been extended so that this information is shown after a successful
+pcre_study() call when information about the compiled regex is being displayed.
+
+48. Cosmetic change to Makefile: there's no need to have / after $(DESTDIR)
+because what follows is always an absolute path. (Later: it turns out that this
+is more than cosmetic for MinGW, because it doesn't like empty path
+components.)
+
+49. Some changes have been made to the callout feature (see 28 above):
+
+(i)  A callout function now has three choices for what it returns:
+
+       0  =>  success, carry on matching
+     > 0  =>  failure at this point, but backtrack if possible
+     < 0  =>  serious error, return this value from pcre_exec()
+
+     Negative values should normally be chosen from the set of PCRE_ERROR_xxx
+     values. In particular, returning PCRE_ERROR_NOMATCH forces a standard
+     "match failed" error. The error number PCRE_ERROR_CALLOUT is reserved for
+     use by callout functions. It will never be used by PCRE itself.
+
+(ii) The pcre_extra structure (see 45 above) has a void * field called
+     callout_data, with corresponding flag bit PCRE_EXTRA_CALLOUT_DATA. The
+     pcre_callout_block structure has a field of the same name. The contents of
+     the field passed in the pcre_extra structure are passed to the callout
+     function in the corresponding field in the callout block. This makes it
+     easier to use the same callout-containing regex from multiple threads. For
+     testing, the pcretest program has a new data escape
+
+       \C*n        pass the number n (may be negative) as callout_data
+
+     If the callout function in pcretest receives a non-zero value as
+     callout_data, it returns that value.
+
+50. Makefile wasn't handling CFLAGS properly when compiling dftables. Also,
+there were some redundant $(CFLAGS) in commands that are now specified as
+$(LINK), which already includes $(CFLAGS).
+
+51. Extensions to UTF-8 support are listed below. These all apply when (a) PCRE
+has been compiled with UTF-8 support *and* pcre_compile() has been compiled
+with the PCRE_UTF8 flag. Patterns that are compiled without that flag assume
+one-byte characters throughout. Note that case-insensitive matching applies
+only to characters whose values are less than 256. PCRE doesn't support the
+notion of cases for higher-valued characters.
+
+(i)   A character class whose characters are all within 0-255 is handled as
+      a bit map, and the map is inverted for negative classes. Previously, a
+      character > 255 always failed to match such a class; however it should
+      match if the class was a negative one (e.g. [^ab]). This has been fixed.
+
+(ii)  A negated character class with a single character < 255 is coded as
+      "not this character" (OP_NOT). This wasn't working properly when the test
+      character was multibyte, either singly or repeated.
+
+(iii) Repeats of multibyte characters are now handled correctly in UTF-8
+      mode, for example: \x{100}{2,3}.
+
+(iv)  The character escapes \b, \B, \d, \D, \s, \S, \w, and \W (either
+      singly or repeated) now correctly test multibyte characters. However,
+      PCRE doesn't recognize any characters with values greater than 255 as
+      digits, spaces, or word characters. Such characters always match \D, \S,
+      and \W, and never match \d, \s, or \w.
+
+(v)   Classes may now contain characters and character ranges with values
+      greater than 255. For example: [ab\x{100}-\x{400}].
+
+(vi)  pcregrep now has a --utf-8 option (synonym -u) which makes it call
+      PCRE in UTF-8 mode.
+
+52. The info request value PCRE_INFO_FIRSTCHAR has been renamed
+PCRE_INFO_FIRSTBYTE because it is a byte value. However, the old name is
+retained for backwards compatibility. (Note that LASTLITERAL is also a byte
+value.)
+
+53. The single man page has become too large. I have therefore split it up into
+a number of separate man pages. These also give rise to individual HTML pages;
+these are now put in a separate directory, and there is an index.html page that
+lists them all. Some hyperlinking between the pages has been installed.
+
+54. Added convenience functions for handling named capturing parentheses.
+
+55. Unknown escapes inside character classes (e.g. [\M]) and escapes that
+aren't interpreted therein (e.g. [\C]) are literals in Perl. This is now also
+true in PCRE, except when the PCRE_EXTENDED option is set, in which case they
+are faulted.
+
+56. Introduced HOST_CC and HOST_CFLAGS which can be set in the environment when
+calling configure. These values are used when compiling the dftables.c program
+which is run to generate the source of the default character tables. They
+default to the values of CC and CFLAGS. If you are cross-compiling PCRE,
+you will need to set these values.
+
+57. Updated the building process for Windows DLL, as provided by Fred Cox.
+
+
+Version 3.9 02-Jan-02
+---------------------
+
+1. A bit of extraneous text had somehow crept into the pcregrep documentation.
+
+2. If --disable-static was given, the building process failed when trying to
+build pcretest and pcregrep. (For some reason it was using libtool to compile
+them, which is not right, as they aren't part of the library.)
+
+
+Version 3.8 18-Dec-01
+---------------------
+
+1. The experimental UTF-8 code was completely screwed up. It was packing the
+bytes in the wrong order. How dumb can you get?
+
+
+Version 3.7 29-Oct-01
+---------------------
+
+1. In updating pcretest to check change 1 of version 3.6, I screwed up.
+This caused pcretest, when used on the test data, to segfault. Unfortunately,
+this didn't happen under Solaris 8, where I normally test things.
+
+2. The Makefile had to be changed to make it work on BSD systems, where 'make'
+doesn't seem to recognize that ./xxx and xxx are the same file. (This entry
+isn't in ChangeLog distributed with 3.7 because I forgot when I hastily made
+this fix an hour or so after the initial 3.7 release.)
+
+
+Version 3.6 23-Oct-01
+---------------------
+
+1. Crashed with /(sens|respons)e and \1ibility/ and "sense and sensibility" if
+offsets passed as NULL with zero offset count.
+
+2. The config.guess and config.sub files had not been updated when I moved to
+the latest autoconf.
+
+
+Version 3.5 15-Aug-01
+---------------------
+
+1. Added some missing #if !defined NOPOSIX conditionals in pcretest.c that
+had been forgotten.
+
+2. By using declared but undefined structures, we can avoid using "void"
+definitions in pcre.h while keeping the internal definitions of the structures
+private.
+
+3. The distribution is now built using autoconf 2.50 and libtool 1.4. From a
+user point of view, this means that both static and shared libraries are built
+by default, but this can be individually controlled. More of the work of
+handling this static/shared cases is now inside libtool instead of PCRE's make
+file.
+
+4. The pcretest utility is now installed along with pcregrep because it is
+useful for users (to test regexs) and by doing this, it automatically gets
+relinked by libtool. The documentation has been turned into a man page, so
+there are now .1, .txt, and .html versions in /doc.
+
+5. Upgrades to pcregrep:
+   (i)   Added long-form option names like gnu grep.
+   (ii)  Added --help to list all options with an explanatory phrase.
+   (iii) Added -r, --recursive to recurse into sub-directories.
+   (iv)  Added -f, --file to read patterns from a file.
+
+6. pcre_exec() was referring to its "code" argument before testing that
+argument for NULL (and giving an error if it was NULL).
+
+7. Upgraded Makefile.in to allow for compiling in a different directory from
+the source directory.
+
+8. Tiny buglet in pcretest: when pcre_fullinfo() was called to retrieve the
+options bits, the pointer it was passed was to an int instead of to an unsigned
+long int. This mattered only on 64-bit systems.
+
+9. Fixed typo (3.4/1) in pcre.h again. Sigh. I had changed pcre.h (which is
+generated) instead of pcre.in, which it its source. Also made the same change
+in several of the .c files.
+
+10. A new release of gcc defines printf() as a macro, which broke pcretest
+because it had an ifdef in the middle of a string argument for printf(). Fixed
+by using separate calls to printf().
+
+11. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure
+script, to force use of CR or LF instead of \n in the source. On non-Unix
+systems, the value can be set in config.h.
+
+12. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an
+absolute limit. Changed the text of the error message to make this clear, and
+likewise updated the man page.
+
+13. The limit of 99 on the number of capturing subpatterns has been removed.
+The new limit is 65535, which I hope will not be a "real" limit.
+
+
+Version 3.4 22-Aug-00
+---------------------
+
+1. Fixed typo in pcre.h: unsigned const char * changed to const unsigned char *.
+
+2. Diagnose condition (?(0) as an error instead of crashing on matching.
+
+
+Version 3.3 01-Aug-00
+---------------------
+
+1. If an octal character was given, but the value was greater than \377, it
+was not getting masked to the least significant bits, as documented. This could
+lead to crashes in some systems.
+
+2. Perl 5.6 (if not earlier versions) accepts classes like [a-\d] and treats
+the hyphen as a literal. PCRE used to give an error; it now behaves like Perl.
+
+3. Added the functions pcre_free_substring() and pcre_free_substring_list().
+These just pass their arguments on to (pcre_free)(), but they are provided
+because some uses of PCRE bind it to non-C systems that can call its functions,
+but cannot call free() or pcre_free() directly.
+
+4. Add "make test" as a synonym for "make check". Corrected some comments in
+the Makefile.
+
+5. Add $(DESTDIR)/ in front of all the paths in the "install" target in the
+Makefile.
+
+6. Changed the name of pgrep to pcregrep, because Solaris has introduced a
+command called pgrep for grepping around the active processes.
+
+7. Added the beginnings of support for UTF-8 character strings.
+
+8. Arranged for the Makefile to pass over the settings of CC, CFLAGS, and
+RANLIB to ./ltconfig so that they are used by libtool. I think these are all
+the relevant ones. (AR is not passed because ./ltconfig does its own figuring
+out for the ar command.)
+
+
+Version 3.2 12-May-00
+---------------------
+
+This is purely a bug fixing release.
+
+1. If the pattern /((Z)+|A)*/ was matched agained ZABCDEFG it matched Z instead
+of ZA. This was just one example of several cases that could provoke this bug,
+which was introduced by change 9 of version 2.00. The code for breaking
+infinite loops after an iteration that matches an empty string was't working
+correctly.
+
+2. The pcretest program was not imitating Perl correctly for the pattern /a*/g
+when matched against abbab (for example). After matching an empty string, it
+wasn't forcing anchoring when setting PCRE_NOTEMPTY for the next attempt; this
+caused it to match further down the string than it should.
+
+3. The code contained an inclusion of sys/types.h. It isn't clear why this
+was there because it doesn't seem to be needed, and it causes trouble on some
+systems, as it is not a Standard C header. It has been removed.
+
+4. Made 4 silly changes to the source to avoid stupid compiler warnings that
+were reported on the Macintosh. The changes were from
+
+  while ((c = *(++ptr)) != 0 && c != '\n');
+to
+  while ((c = *(++ptr)) != 0 && c != '\n') ;
+
+Totally extraordinary, but if that's what it takes...
+
+5. PCRE is being used in one environment where neither memmove() nor bcopy() is
+available. Added HAVE_BCOPY and an autoconf test for it; if neither
+HAVE_MEMMOVE nor HAVE_BCOPY is set, use a built-in emulation function which
+assumes the way PCRE uses memmove() (always moving upwards).
+
+6. PCRE is being used in one environment where strchr() is not available. There
+was only one use in pcre.c, and writing it out to avoid strchr() probably gives
+faster code anyway.
+
+
+Version 3.1 09-Feb-00
+---------------------
+
+The only change in this release is the fixing of some bugs in Makefile.in for
+the "install" target:
+
+(1) It was failing to install pcreposix.h.
+
+(2) It was overwriting the pcre.3 man page with the pcreposix.3 man page.
+
+
+Version 3.0 01-Feb-00
+---------------------
+
+1. Add support for the /+ modifier to perltest (to output $` like it does in
+pcretest).
+
+2. Add support for the /g modifier to perltest.
+
+3. Fix pcretest so that it behaves even more like Perl for /g when the pattern
+matches null strings.
+
+4. Fix perltest so that it doesn't do unwanted things when fed an empty
+pattern. Perl treats empty patterns specially - it reuses the most recent
+pattern, which is not what we want. Replace // by /(?#)/ in order to avoid this
+effect.
+
+5. The POSIX interface was broken in that it was just handing over the POSIX
+captured string vector to pcre_exec(), but (since release 2.00) PCRE has
+required a bigger vector, with some working space on the end. This means that
+the POSIX wrapper now has to get and free some memory, and copy the results.
+
+6. Added some simple autoconf support, placing the test data and the
+documentation in separate directories, re-organizing some of the
+information files, and making it build pcre-config (a GNU standard). Also added
+libtool support for building PCRE as a shared library, which is now the
+default.
+
+7. Got rid of the leading zero in the definition of PCRE_MINOR because 08 and
+09 are not valid octal constants. Single digits will be used for minor values
+less than 10.
+
+8. Defined REG_EXTENDED and REG_NOSUB as zero in the POSIX header, so that
+existing programs that set these in the POSIX interface can use PCRE without
+modification.
+
+9. Added a new function, pcre_fullinfo() with an extensible interface. It can
+return all that pcre_info() returns, plus additional data. The pcre_info()
+function is retained for compatibility, but is considered to be obsolete.
+
+10. Added experimental recursion feature (?R) to handle one common case that
+Perl 5.6 will be able to do with (?p{...}).
+
+11. Added support for POSIX character classes like [:alpha:], which Perl is
+adopting.
+
+
+Version 2.08 31-Aug-99
+----------------------
+
+1. When startoffset was not zero and the pattern began with ".*", PCRE was not
+trying to match at the startoffset position, but instead was moving forward to
+the next newline as if a previous match had failed.
+
+2. pcretest was not making use of PCRE_NOTEMPTY when repeating for /g and /G,
+and could get into a loop if a null string was matched other than at the start
+of the subject.
+
+3. Added definitions of PCRE_MAJOR and PCRE_MINOR to pcre.h so the version can
+be distinguished at compile time, and for completeness also added PCRE_DATE.
+
+5. Added Paul Sokolovsky's minor changes to make it easy to compile a Win32 DLL
+in GnuWin32 environments.
+
+
+Version 2.07 29-Jul-99
+----------------------
+
+1. The documentation is now supplied in plain text form and HTML as well as in
+the form of man page sources.
+
+2. C++ compilers don't like assigning (void *) values to other pointer types.
+In particular this affects malloc(). Although there is no problem in Standard
+C, I've put in casts to keep C++ compilers happy.
+
+3. Typo on pcretest.c; a cast of (unsigned char *) in the POSIX regexec() call
+should be (const char *).
+
+4. If NOPOSIX is defined, pcretest.c compiles without POSIX support. This may
+be useful for non-Unix systems who don't want to bother with the POSIX stuff.
+However, I haven't made this a standard facility. The documentation doesn't
+mention it, and the Makefile doesn't support it.
+
+5. The Makefile now contains an "install" target, with editable destinations at
+the top of the file. The pcretest program is not installed.
+
+6. pgrep -V now gives the PCRE version number and date.
+
+7. Fixed bug: a zero repetition after a literal string (e.g. /abcde{0}/) was
+causing the entire string to be ignored, instead of just the last character.
+
+8. If a pattern like /"([^\\"]+|\\.)*"/ is applied in the normal way to a
+non-matching string, it can take a very, very long time, even for strings of
+quite modest length, because of the nested recursion. PCRE now does better in
+some of these cases. It does this by remembering the last required literal
+character in the pattern, and pre-searching the subject to ensure it is present
+before running the real match. In other words, it applies a heuristic to detect
+some types of certain failure quickly, and in the above example, if presented
+with a string that has no trailing " it gives "no match" very quickly.
+
+9. A new runtime option PCRE_NOTEMPTY causes null string matches to be ignored;
+other alternatives are tried instead.
+
+
+Version 2.06 09-Jun-99
+----------------------
+
+1. Change pcretest's output for amount of store used to show just the code
+space, because the remainder (the data block) varies in size between 32-bit and
+64-bit systems.
+
+2. Added an extra argument to pcre_exec() to supply an offset in the subject to
+start matching at. This allows lookbehinds to work when searching for multiple
+occurrences in a string.
+
+3. Added additional options to pcretest for testing multiple occurrences:
+
+   /+   outputs the rest of the string that follows a match
+   /g   loops for multiple occurrences, using the new startoffset argument
+   /G   loops for multiple occurrences by passing an incremented pointer
+
+4. PCRE wasn't doing the "first character" optimization for patterns starting
+with \b or \B, though it was doing it for other lookbehind assertions. That is,
+it wasn't noticing that a match for a pattern such as /\bxyz/ has to start with
+the letter 'x'. On long subject strings, this gives a significant speed-up.
+
+
+Version 2.05 21-Apr-99
+----------------------
+
+1. Changed the type of magic_number from int to long int so that it works
+properly on 16-bit systems.
+
+2. Fixed a bug which caused patterns starting with .* not to work correctly
+when the subject string contained newline characters. PCRE was assuming
+anchoring for such patterns in all cases, which is not correct because .* will
+not pass a newline unless PCRE_DOTALL is set. It now assumes anchoring only if
+DOTALL is set at top level; otherwise it knows that patterns starting with .*
+must be retried after every newline in the subject.
+
+
+Version 2.04 18-Feb-99
+----------------------
+
+1. For parenthesized subpatterns with repeats whose minimum was zero, the
+computation of the store needed to hold the pattern was incorrect (too large).
+If such patterns were nested a few deep, this could multiply and become a real
+problem.
+
+2. Added /M option to pcretest to show the memory requirement of a specific
+pattern. Made -m a synonym of -s (which does this globally) for compatibility.
+
+3. Subpatterns of the form (regex){n,m} (i.e. limited maximum) were being
+compiled in such a way that the backtracking after subsequent failure was
+pessimal. Something like (a){0,3} was compiled as (a)?(a)?(a)? instead of
+((a)((a)(a)?)?)? with disastrous performance if the maximum was of any size.
+
+
+Version 2.03 02-Feb-99
+----------------------
+
+1. Fixed typo and small mistake in man page.
+
+2. Added 4th condition (GPL supersedes if conflict) and created separate
+LICENCE file containing the conditions.
+
+3. Updated pcretest so that patterns such as /abc\/def/ work like they do in
+Perl, that is the internal \ allows the delimiter to be included in the
+pattern. Locked out the use of \ as a delimiter. If \ immediately follows
+the final delimiter, add \ to the end of the pattern (to test the error).
+
+4. Added the convenience functions for extracting substrings after a successful
+match. Updated pcretest to make it able to test these functions.
+
+
+Version 2.02 14-Jan-99
+----------------------
+
+1. Initialized the working variables associated with each extraction so that
+their saving and restoring doesn't refer to uninitialized store.
+
+2. Put dummy code into study.c in order to trick the optimizer of the IBM C
+compiler for OS/2 into generating correct code. Apparently IBM isn't going to
+fix the problem.
+
+3. Pcretest: the timing code wasn't using LOOPREPEAT for timing execution
+calls, and wasn't printing the correct value for compiling calls. Increased the
+default value of LOOPREPEAT, and the number of significant figures in the
+times.
+
+4. Changed "/bin/rm" in the Makefile to "-rm" so it works on Windows NT.
+
+5. Renamed "deftables" as "dftables" to get it down to 8 characters, to avoid
+a building problem on Windows NT with a FAT file system.
+
+
+Version 2.01 21-Oct-98
+----------------------
+
+1. Changed the API for pcre_compile() to allow for the provision of a pointer
+to character tables built by pcre_maketables() in the current locale. If NULL
+is passed, the default tables are used.
+
+
+Version 2.00 24-Sep-98
+----------------------
+
+1. Since the (>?) facility is in Perl 5.005, don't require PCRE_EXTRA to enable
+it any more.
+
+2. Allow quantification of (?>) groups, and make it work correctly.
+
+3. The first character computation wasn't working for (?>) groups.
+
+4. Correct the implementation of \Z (it is permitted to match on the \n at the
+end of the subject) and add 5.005's \z, which really does match only at the
+very end of the subject.
+
+5. Remove the \X "cut" facility; Perl doesn't have it, and (?> is neater.
+
+6. Remove the ability to specify CASELESS, MULTILINE, DOTALL, and
+DOLLAR_END_ONLY at runtime, to make it possible to implement the Perl 5.005
+localized options. All options to pcre_study() were also removed.
+
+7. Add other new features from 5.005:
+
+   $(?<=           positive lookbehind
+   $(?<!           negative lookbehind
+   (?imsx-imsx)    added the unsetting capability
+                   such a setting is global if at outer level; local otherwise
+   (?imsx-imsx:)   non-capturing groups with option setting
+   (?(cond)re|re)  conditional pattern matching
+
+   A backreference to itself in a repeated group matches the previous
+   captured string.
+
+8. General tidying up of studying (both automatic and via "study")
+consequential on the addition of new assertions.
+
+9. As in 5.005, unlimited repeated groups that could match an empty substring
+are no longer faulted at compile time. Instead, the loop is forcibly broken at
+runtime if any iteration does actually match an empty substring.
+
+10. Include the RunTest script in the distribution.
+
+11. Added tests from the Perl 5.005_02 distribution. This showed up a few
+discrepancies, some of which were old and were also with respect to 5.004. They
+have now been fixed.
+
+
+Version 1.09 28-Apr-98
+----------------------
+
+1. A negated single character class followed by a quantifier with a minimum
+value of one (e.g.  [^x]{1,6}  ) was not compiled correctly. This could lead to
+program crashes, or just wrong answers. This did not apply to negated classes
+containing more than one character, or to minima other than one.
+
+
+Version 1.08 27-Mar-98
+----------------------
+
+1. Add PCRE_UNGREEDY to invert the greediness of quantifiers.
+
+2. Add (?U) and (?X) to set PCRE_UNGREEDY and PCRE_EXTRA respectively. The
+latter must appear before anything that relies on it in the pattern.
+
+
+Version 1.07 16-Feb-98
+----------------------
+
+1. A pattern such as /((a)*)*/ was not being diagnosed as in error (unlimited
+repeat of a potentially empty string).
+
+
+Version 1.06 23-Jan-98
+----------------------
+
+1. Added Markus Oberhumer's little patches for C++.
+
+2. Literal strings longer than 255 characters were broken.
+
+
+Version 1.05 23-Dec-97
+----------------------
+
+1. Negated character classes containing more than one character were failing if
+PCRE_CASELESS was set at run time.
+
+
+Version 1.04 19-Dec-97
+----------------------
+
+1. Corrected the man page, where some "const" qualifiers had been omitted.
+
+2. Made debugging output print "{0,xxx}" instead of just "{,xxx}" to agree with
+input syntax.
+
+3. Fixed memory leak which occurred when a regex with back references was
+matched with an offsets vector that wasn't big enough. The temporary memory
+that is used in this case wasn't being freed if the match failed.
+
+4. Tidied pcretest to ensure it frees memory that it gets.
+
+5. Temporary memory was being obtained in the case where the passed offsets
+vector was exactly big enough.
+
+6. Corrected definition of offsetof() from change 5 below.
+
+7. I had screwed up change 6 below and broken the rules for the use of
+setjmp(). Now fixed.
+
+
+Version 1.03 18-Dec-97
+----------------------
+
+1. A erroneous regex with a missing opening parenthesis was correctly
+diagnosed, but PCRE attempted to access brastack[-1], which could cause crashes
+on some systems.
+
+2. Replaced offsetof(real_pcre, code) by offsetof(real_pcre, code[0]) because
+it was reported that one broken compiler failed on the former because "code" is
+also an independent variable.
+
+3. The erroneous regex a[]b caused an array overrun reference.
+
+4. A regex ending with a one-character negative class (e.g. /[^k]$/) did not
+fail on data ending with that character. (It was going on too far, and checking
+the next character, typically a binary zero.) This was specific to the
+optimized code for single-character negative classes.
+
+5. Added a contributed patch from the TIN world which does the following:
+
+  + Add an undef for memmove, in case the the system defines a macro for it.
+
+  + Add a definition of offsetof(), in case there isn't one. (I don't know
+    the reason behind this - offsetof() is part of the ANSI standard - but
+    it does no harm).
+
+  + Reduce the ifdef's in pcre.c using macro DPRINTF, thereby eliminating
+    most of the places where whitespace preceded '#'. I have given up and
+    allowed the remaining 2 cases to be at the margin.
+
+  + Rename some variables in pcre to eliminate shadowing. This seems very
+    pedantic, but does no harm, of course.
+
+6. Moved the call to setjmp() into its own function, to get rid of warnings
+from gcc -Wall, and avoided calling it at all unless PCRE_EXTRA is used.
+
+7. Constructs such as \d{8,} were compiling into the equivalent of
+\d{8}\d{0,65527} instead of \d{8}\d* which didn't make much difference to the
+outcome, but in this particular case used more store than had been allocated,
+which caused the bug to be discovered because it threw up an internal error.
+
+8. The debugging code in both pcre and pcretest for outputting the compiled
+form of a regex was going wrong in the case of back references followed by
+curly-bracketed repeats.
+
+
+Version 1.02 12-Dec-97
+----------------------
+
+1. Typos in pcre.3 and comments in the source fixed.
+
+2. Applied a contributed patch to get rid of places where it used to remove
+'const' from variables, and fixed some signed/unsigned and uninitialized
+variable warnings.
+
+3. Added the "runtest" target to Makefile.
+
+4. Set default compiler flag to -O2 rather than just -O.
+
+
+Version 1.01 19-Nov-97
+----------------------
+
+1. PCRE was failing to diagnose unlimited repeat of empty string for patterns
+like /([ab]*)*/, that is, for classes with more than one character in them.
+
+2. Likewise, it wasn't diagnosing patterns with "once-only" subpatterns, such
+as /((?>a*))*/ (a PCRE_EXTRA facility).
+
+
+Version 1.00 18-Nov-97
+----------------------
+
+1. Added compile-time macros to support systems such as SunOS4 which don't have
+memmove() or strerror() but have other things that can be used instead.
+
+2. Arranged that "make clean" removes the executables.
+
+
+Version 0.99 27-Oct-97
+----------------------
+
+1. Fixed bug in code for optimizing classes with only one character. It was
+initializing a 32-byte map regardless, which could cause it to run off the end
+of the memory it had got.
+
+2. Added, conditional on PCRE_EXTRA, the proposed (?>REGEX) construction.
+
+
+Version 0.98 22-Oct-97
+----------------------
+
+1. Fixed bug in code for handling temporary memory usage when there are more
+back references than supplied space in the ovector. This could cause segfaults.
+
+
+Version 0.97 21-Oct-97
+----------------------
+
+1. Added the \X "cut" facility, conditional on PCRE_EXTRA.
+
+2. Optimized negated single characters not to use a bit map.
+
+3. Brought error texts together as macro definitions; clarified some of them;
+fixed one that was wrong - it said "range out of order" when it meant "invalid
+escape sequence".
+
+4. Changed some char * arguments to const char *.
+
+5. Added PCRE_NOTBOL and PCRE_NOTEOL (from POSIX).
+
+6. Added the POSIX-style API wrapper in pcreposix.a and testing facilities in
+pcretest.
+
+
+Version 0.96 16-Oct-97
+----------------------
+
+1. Added a simple "pgrep" utility to the distribution.
+
+2. Fixed an incompatibility with Perl: "{" is now treated as a normal character
+unless it appears in one of the precise forms "{ddd}", "{ddd,}", or "{ddd,ddd}"
+where "ddd" means "one or more decimal digits".
+
+3. Fixed serious bug. If a pattern had a back reference, but the call to
+pcre_exec() didn't supply a large enough ovector to record the related
+identifying subpattern, the match always failed. PCRE now remembers the number
+of the largest back reference, and gets some temporary memory in which to save
+the offsets during matching if necessary, in order to ensure that
+backreferences always work.
+
+4. Increased the compatibility with Perl in a number of ways:
+
+  (a) . no longer matches \n by default; an option PCRE_DOTALL is provided
+      to request this handling. The option can be set at compile or exec time.
+
+  (b) $ matches before a terminating newline by default; an option
+      PCRE_DOLLAR_ENDONLY is provided to override this (but not in multiline
+      mode). The option can be set at compile or exec time.
+
+  (c) The handling of \ followed by a digit other than 0 is now supposed to be
+      the same as Perl's. If the decimal number it represents is less than 10
+      or there aren't that many previous left capturing parentheses, an octal
+      escape is read. Inside a character class, it's always an octal escape,
+      even if it is a single digit.
+
+  (d) An escaped but undefined alphabetic character is taken as a literal,
+      unless PCRE_EXTRA is set. Currently this just reserves the remaining
+      escapes.
+
+  (e) {0} is now permitted. (The previous item is removed from the compiled
+      pattern).
+
+5. Changed all the names of code files so that the basic parts are no longer
+than 10 characters, and abolished the teeny "globals.c" file.
+
+6. Changed the handling of character classes; they are now done with a 32-byte
+bit map always.
+
+7. Added the -d and /D options to pcretest to make it possible to look at the
+internals of compilation without having to recompile pcre.
+
+
+Version 0.95 23-Sep-97
+----------------------
+
+1. Fixed bug in pre-pass concerning escaped "normal" characters such as \x5c or
+\x20 at the start of a run of normal characters. These were being treated as
+real characters, instead of the source characters being re-checked.
+
+
+Version 0.94 18-Sep-97
+----------------------
+
+1. The functions are now thread-safe, with the caveat that the global variables
+containing pointers to malloc() and free() or alternative functions are the
+same for all threads.
+
+2. Get pcre_study() to generate a bitmap of initial characters for non-
+anchored patterns when this is possible, and use it if passed to pcre_exec().
+
+
+Version 0.93 15-Sep-97
+----------------------
+
+1. /(b)|(:+)/ was computing an incorrect first character.
+
+2. Add pcre_study() to the API and the passing of pcre_extra to pcre_exec(),
+but not actually doing anything yet.
+
+3. Treat "-" characters in classes that cannot be part of ranges as literals,
+as Perl does (e.g. [-az] or [az-]).
+
+4. Set the anchored flag if a branch starts with .* or .*? because that tests
+all possible positions.
+
+5. Split up into different modules to avoid including unneeded functions in a
+compiled binary. However, compile and exec are still in one module. The "study"
+function is split off.
+
+6. The character tables are now in a separate module whose source is generated
+by an auxiliary program - but can then be edited by hand if required. There are
+now no calls to isalnum(), isspace(), isdigit(), isxdigit(), tolower() or
+toupper() in the code.
+
+7. Turn the malloc/free funtions variables into pcre_malloc and pcre_free and
+make them global. Abolish the function for setting them, as the caller can now
+set them directly.
+
+
+Version 0.92 11-Sep-97
+----------------------
+
+1. A repeat with a fixed maximum and a minimum of 1 for an ordinary character
+(e.g. /a{1,3}/) was broken (I mis-optimized it).
+
+2. Caseless matching was not working in character classes if the characters in
+the pattern were in upper case.
+
+3. Make ranges like [W-c] work in the same way as Perl for caseless matching.
+
+4. Make PCRE_ANCHORED public and accept as a compile option.
+
+5. Add an options word to pcre_exec() and accept PCRE_ANCHORED and
+PCRE_CASELESS at run time. Add escapes \A and \I to pcretest to cause it to
+pass them.
+
+6. Give an error if bad option bits passed at compile or run time.
+
+7. Add PCRE_MULTILINE at compile and exec time, and (?m) as well. Add \M to
+pcretest to cause it to pass that flag.
+
+8. Add pcre_info(), to get the number of identifying subpatterns, the stored
+options, and the first character, if set.
+
+9. Recognize C+ or C{n,m} where n >= 1 as providing a fixed starting character.
+
+
+Version 0.91 10-Sep-97
+----------------------
+
+1. PCRE was failing to diagnose unlimited repeats of subpatterns that could
+match the empty string as in /(a*)*/. It was looping and ultimately crashing.
+
+2. PCRE was looping on encountering an indefinitely repeated back reference to
+a subpattern that had matched an empty string, e.g. /(a|)\1*/. It now does what
+Perl does - treats the match as successful.
+
+****
diff --git a/external-libs/pcre/INSTALL b/external-libs/pcre/INSTALL
new file mode 100644
index 00000000..08802812
--- /dev/null
+++ b/external-libs/pcre/INSTALL
@@ -0,0 +1,185 @@
+Basic Installation
+==================
+
+   These are generic installation instructions that apply to systems that
+can run the `configure' shell script - Unix systems and any that imitate
+it. They are not specific to PCRE. There are PCRE-specific instructions
+for non-Unix systems in the file NON-UNIX-USE.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, a file
+`config.cache' that saves the results of its tests to speed up
+reconfiguring, and a file `config.log' containing compiler output
+(useful mainly for debugging `configure').
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If at some point `config.cache'
+contains results you don't want to keep, you may remove or edit it.
+
+   The file `configure.in' is used to create `configure' by a program
+called `autoconf'.  You only need `configure.in' if you want to change
+it or regenerate `configure' using a newer version of `autoconf'.
+
+The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.  If you're
+     using `csh' on an old version of System V, you might need to type
+     `sh ./configure' instead to prevent `csh' from trying to execute
+     `configure' itself.
+
+     Running `configure' takes awhile.  While running, it prints some
+     messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.
+
+  5. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the `configure' script does not know about.  You can give `configure'
+initial values for variables by setting them in the environment.  Using
+a Bourne-compatible shell, you can do that on the command line like
+this:
+     CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
+
+Or on systems that have the `env' program, you can do it like this:
+     env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you must use a version of `make' that
+supports the `VPATH' variable, such as GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+   If you have to use a `make' that does not supports the `VPATH'
+variable, you have to compile the package for one architecture at a time
+in the source code directory.  After you have installed the package for
+one architecture, use `make distclean' before reconfiguring for another
+architecture.
+
+Installation Names
+==================
+
+   By default, `make install' will install the package's files in
+`/usr/local/bin', `/usr/local/man', etc.  You can specify an
+installation prefix other than `/usr/local' by giving `configure' the
+option `--prefix=PATH'.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+give `configure' the option `--exec-prefix=PATH', the package will use
+PATH as the prefix for installing programs and libraries.
+Documentation and other data files will still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=PATH' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+   Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+   There may be some features `configure' can not figure out
+automatically, but needs to determine by the type of host the package
+will run on.  Usually `configure' can figure that out, but if it prints
+a message saying it can not guess the host type, give it the
+`--host=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name with three fields:
+     CPU-COMPANY-SYSTEM
+
+See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the host type.
+
+   If you are building compiler tools for cross-compiling, you can also
+use the `--target=TYPE' option to select the type of system they will
+produce code for and the `--build=TYPE' option to select the type of
+system on which you are compiling the package.
+
+Sharing Defaults
+================
+
+   If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Operation Controls
+==================
+
+   `configure' recognizes the following options to control how it
+operates.
+
+`--cache-file=FILE'
+     Use and save the results of the tests in FILE instead of
+     `./config.cache'.  Set FILE to `/dev/null' to disable caching, for
+     debugging `configure'.
+
+`--help'
+     Print a summary of the options to `configure', and exit.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`--version'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`configure' also accepts some other, not widely useful, options.
diff --git a/external-libs/pcre/LICENCE b/external-libs/pcre/LICENCE
new file mode 100644
index 00000000..09a242c1
--- /dev/null
+++ b/external-libs/pcre/LICENCE
@@ -0,0 +1,54 @@
+PCRE LICENCE
+------------
+
+PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+University of Cambridge Computing Service,
+Cambridge, England. Phone: +44 1223 334714.
+
+Copyright (c) 1997-2003 University of Cambridge
+
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission. In practice, this means that if you use
+   PCRE in software that you distribute to others, commercially or
+   otherwise, you must put a sentence like this
+
+     Regular expression support is provided by the PCRE library package,
+     which is open source software, written by Philip Hazel, and copyright
+     by the University of Cambridge, England.
+
+   somewhere reasonably visible in your documentation and in any relevant
+   files or online help data or similar. A reference to the ftp site for
+   the source, that is, to
+
+     ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
+
+   should also be given in the documentation. However, this condition is not
+   intended to apply to whole chains of software. If package A includes PCRE,
+   it must acknowledge it, but if package B is software that includes package
+   A, the condition is not imposed on package B (unless it uses PCRE
+   independently).
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), or Lesser General Purpose Licence (LGPL),
+   then the terms of that licence shall supersede any condition above with
+   which it is incompatible.
+
+The documentation for PCRE, supplied in the "doc" directory, is distributed
+under the same terms as the software itself.
+
+End
diff --git a/external-libs/pcre/Makefile.in b/external-libs/pcre/Makefile.in
new file mode 100644
index 00000000..8fd1e1a6
--- /dev/null
+++ b/external-libs/pcre/Makefile.in
@@ -0,0 +1,279 @@
+
+# Makefile.in for PCRE (Perl-Compatible Regular Expression) library.
+
+
+#############################################################################
+
+# PCRE is developed on a Unix system. I do not use Windows or Macs, and know
+# nothing about building software on them. Although the code of PCRE should
+# be very portable, the building system in this Makefile is designed for Unix
+# systems. However, there are features that have been supplied to me by various
+# people that should make it work on MinGW and Cygwin systems.
+
+# This setting enables Unix-style directory scanning in pcregrep, triggered
+# by the -f option. Maybe one day someone will add code for other systems.
+
+PCREGREP_OSTYPE=-DIS_UNIX
+
+#############################################################################
+
+
+#---------------------------------------------------------------------------#
+# The following lines are modified by "configure" to insert data that it is #
+# given in its arguments, or which it finds out for itself.                 #
+#---------------------------------------------------------------------------#
+
+SHELL = @SHELL@
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+top_srcdir = @top_srcdir@
+
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+
+# NB: top_builddir is not referred to directly below, but it is used in the
+# setting of $(LIBTOOL), so don't remove it!
+
+top_builddir = .
+
+# BINDIR is the directory in which the pcregrep, pcretest, and pcre-config
+#          commands are installed.
+# INCDIR is the directory in which the public header files pcre.h and
+#          pcreposix.h are installed.
+# LIBDIR is the directory in which the libraries are installed.
+# MANDIR is the directory in which the man pages are installed.
+
+BINDIR = @bindir@
+LIBDIR = @libdir@
+INCDIR = @includedir@
+MANDIR = @mandir@
+
+# EXEEXT is set by configure to the extention of an executable file
+# OBJEXT is set by configure to the extention of an object file
+# The BUILD_* equivalents are the same but for the host we're building on
+
+EXEEXT = @EXEEXT@
+OBJEXT = @OBJEXT@
+# Note that these are just here to have a convenient place to look at the
+# outcome.
+BUILD_EXEEXT = @BUILD_EXEEXT@
+BUILD_OBJEXT = @BUILD_OBJEXT@
+
+# The compiler, C flags, preprocessor flags, etc
+
+CC = @CC@
+CFLAGS = @CFLAGS@
+CPPFLAGS = @CPPFLAGS@
+
+CC_FOR_BUILD = @CC_FOR_BUILD@
+CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
+
+UTF8 = @UTF8@
+NEWLINE = @NEWLINE@
+POSIX_MALLOC_THRESHOLD = @POSIX_MALLOC_THRESHOLD@
+LINK_SIZE = @LINK_SIZE@
+MATCH_LIMIT = @MATCH_LIMIT@
+NO_RECURSE = @NO_RECURSE@
+EBCDIC = @EBCDIC@
+
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+
+# LIBTOOL enables the building of shared and static libraries. It is set up
+# to do one or the other or both by ./configure.
+
+LIBTOOL = @LIBTOOL@
+LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) -c $(CFLAGS) -I. -I$(top_srcdir) $(NEWLINE) $(LINK_SIZE) $(MATCH_LIMIT) $(NO_RECURSE) $(EBCDIC)
+@ON_WINDOWS@LINK = $(CC) $(CFLAGS) -I. -I$(top_srcdir) -L.libs
+@NOT_ON_WINDOWS@LINK = $(LIBTOOL) --mode=link $(CC) $(CFLAGS) -I. -I$(top_srcdir)
+LINKLIB = $(LIBTOOL) --mode=link $(CC) $(CFLAGS) -I. -I$(top_srcdir)
+LINK_FOR_BUILD = $(LIBTOOL) --mode=link $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) -I. -I$(top_srcdir)
+
+# These are the version numbers for the shared libraries
+
+PCRELIBVERSION = @PCRE_LIB_VERSION@
+PCREPOSIXLIBVERSION = @PCRE_POSIXLIB_VERSION@
+
+##############################################################################
+
+
+OBJ = maketables.@OBJEXT@ get.@OBJEXT@ study.@OBJEXT@ pcre.@OBJEXT@ @POSIX_OBJ@
+LOBJ = maketables.lo get.lo study.lo pcre.lo @POSIX_LOBJ@
+
+all:            libpcre.la @POSIX_LIB@ pcretest@EXEEXT@ pcregrep@EXEEXT@ @ON_WINDOWS@ winshared
+
+pcregrep@EXEEXT@: libpcre.la pcregrep.@OBJEXT@ @ON_WINDOWS@ winshared
+		$(LINK) -o pcregrep@EXEEXT@ pcregrep.@OBJEXT@ libpcre.la
+
+pcretest@EXEEXT@: libpcre.la @POSIX_LIB@ pcretest.@OBJEXT@ @ON_WINDOWS@ winshared
+		$(LINK) $(PURIFY) $(EFENCE) -o pcretest@EXEEXT@  pcretest.@OBJEXT@ \
+		libpcre.la @POSIX_LIB@
+
+libpcre.la:     $(OBJ)
+		-rm -f libpcre.la
+		$(LINKLIB) -rpath $(LIBDIR) -version-info \
+		'$(PCRELIBVERSION)' -o libpcre.la $(LOBJ)
+
+libpcreposix.la: libpcre.la pcreposix.@OBJEXT@
+		-rm -f libpcreposix.la
+		$(LINKLIB) -rpath $(LIBDIR) libpcre.la -version-info \
+		'$(PCREPOSIXLIBVERSION)' -o libpcreposix.la pcreposix.lo
+
+pcre.@OBJEXT@:  $(top_srcdir)/chartables.c $(top_srcdir)/pcre.c \
+		$(top_srcdir)/internal.h $(top_srcdir)/printint.c \
+		pcre.h config.h Makefile
+		$(LTCOMPILE) $(UTF8) $(POSIX_MALLOC_THRESHOLD) $(top_srcdir)/pcre.c
+
+pcreposix.@OBJEXT@: $(top_srcdir)/pcreposix.c $(top_srcdir)/pcreposix.h \
+		$(top_srcdir)/internal.h pcre.h config.h Makefile
+		$(LTCOMPILE) $(POSIX_MALLOC_THRESHOLD) $(top_srcdir)/pcreposix.c
+
+maketables.@OBJEXT@:   $(top_srcdir)/maketables.c $(top_srcdir)/internal.h \
+		pcre.h config.h Makefile
+		$(LTCOMPILE) $(top_srcdir)/maketables.c
+
+get.@OBJEXT@:          $(top_srcdir)/get.c $(top_srcdir)/internal.h \
+		pcre.h config.h Makefile
+		$(LTCOMPILE) $(top_srcdir)/get.c
+
+study.@OBJEXT@:        $(top_srcdir)/study.c $(top_srcdir)/internal.h \
+		pcre.h config.h Makefile
+		$(LTCOMPILE) $(UTF8) $(top_srcdir)/study.c
+
+pcretest.@OBJEXT@:     $(top_srcdir)/pcretest.c $(top_srcdir)/internal.h \
+		$(top_srcdir)/printint.c \
+		pcre.h config.h Makefile
+		$(CC) -c $(CFLAGS) -I. $(UTF8) $(LINK_SIZE) $(top_srcdir)/pcretest.c
+
+pcregrep.@OBJEXT@:     $(top_srcdir)/pcregrep.c pcre.h Makefile config.h
+		$(CC) -c $(CFLAGS) -I. $(UTF8) $(PCREGREP_OSTYPE) $(top_srcdir)/pcregrep.c
+
+# Some Windows-specific targets for MinGW. Do not use for Cygwin.
+
+winshared : .libs/@WIN_PREFIX@pcre.dll .libs/@WIN_PREFIX@pcreposix.dll
+
+.libs/@WIN_PREFIX@pcre.dll : libpcre.la
+	$(CC) $(CFLAGS) -shared -o $@ \
+	-Wl,--whole-archive .libs/libpcre.a \
+	-Wl,--out-implib,.libs/libpcre.dll.a \
+	-Wl,--output-def,.libs/@WIN_PREFIX@pcre.dll-def \
+	-Wl,--export-all-symbols \
+	-Wl,--no-whole-archive
+	sed -e "s#dlname=''#dlname='../bin/@WIN_PREFIX@pcre.dll'#" \
+	-e "s#library_names=''#library_names='libpcre.dll.a'#" \
+	< .libs/libpcre.lai > .libs/libpcre.lai.tmp && \
+	mv .libs/libpcre.lai.tmp .libs/libpcre.lai
+	sed -e "s#dlname=''#dlname='../bin/@WIN_PREFIX@pcre.dll'#" \
+	-e "s#library_names=''#library_names='libpcre.dll.a'#" \
+	< libpcre.la > libpcre.la.tmp && \
+	mv libpcre.la.tmp libpcre.la
+
+
+.libs/@WIN_PREFIX@pcreposix.dll: libpcreposix.la libpcre.la
+	$(CC) $(CFLAGS) -shared -o $@ \
+	-Wl,--whole-archive .libs/libpcreposix.a \
+	-Wl,--out-implib,.libs/@WIN_PREFIX@pcreposix.dll.a \
+	-Wl,--output-def,.libs/@WIN_PREFIX@libpcreposix.dll-def \
+	-Wl,--export-all-symbols \
+	-Wl,--no-whole-archive .libs/libpcre.a
+	sed -e "s#dlname=''#dlname='../bin/@WIN_PREFIX@pcreposix.dll'#" \
+	-e "s#library_names=''#library_names='libpcreposix.dll.a'#"\
+	< .libs/libpcreposix.lai > .libs/libpcreposix.lai.tmp && \
+	mv .libs/libpcreposix.lai.tmp .libs/libpcreposix.lai
+	sed -e "s#dlname=''#dlname='../bin/@WIN_PREFIX@pcreposix.dll'#" \
+	-e "s#library_names=''#library_names='libpcreposix.dll.a'#"\
+	< libpcreposix.la > libpcreposix.la.tmp && \
+	mv libpcreposix.la.tmp libpcreposix.la
+
+
+wininstall : winshared
+	$(mkinstalldirs) $(DESTDIR)$(LIBDIR)
+	$(mkinstalldirs) $(DESTDIR)$(BINDIR)
+	$(INSTALL) .libs/@WIN_PREFIX@pcre.dll $(DESTDIR)$(BINDIR)/@WIN_PREFIX@pcre.dll
+	$(INSTALL) .libs/@WIN_PREFIX@pcreposix.dll $(DESTDIR)$(BINDIR)/@WIN_PREFIX@pcreposix.dll
+	$(INSTALL) .libs/@WIN_PREFIX@libpcreposix.dll.a $(DESTDIR)$(LIBDIR)/@WIN_PREFIX@libpcreposix.dll.a
+	$(INSTALL) .libs/@WIN_PREFIX@libpcre.dll.a $(DESTDIR)$(LIBDIR)/@WIN_PREFIX@libpcre.dll.a
+	-strip -g $(DESTDIR)$(BINDIR)/@WIN_PREFIX@pcre.dll
+	-strip -g $(DESTDIR)$(BINDIR)/@WIN_PREFIX@pcreposix.dll
+	-strip $(DESTDIR)$(BINDIR)/pcregrep@EXEEXT@
+	-strip $(DESTDIR)$(BINDIR)/pcretest@EXEEXT@
+
+# An auxiliary program makes the default character table source
+
+$(top_srcdir)/chartables.c:   dftables
+		./dftables $(top_srcdir)/chartables.c
+
+dftables.@BUILD_OBJEXT@:     $(top_srcdir)/dftables.c $(top_srcdir)/maketables.c \
+		$(top_srcdir)/internal.h pcre.h config.h Makefile
+		$(CC_FOR_BUILD) -c $(CFLAGS_FOR_BUILD) -I. $(top_srcdir)/dftables.c
+
+dftables:       dftables.@BUILD_OBJEXT@
+		$(LINK_FOR_BUILD) -o dftables dftables.@OBJEXT@
+
+install:        all @ON_WINDOWS@ wininstall
+@NOT_ON_WINDOWS@	       $(mkinstalldirs) $(DESTDIR)$(LIBDIR)
+@NOT_ON_WINDOWS@	       echo "$(LIBTOOL) --mode=install $(INSTALL) libpcre.la $(DESTDIR)$(LIBDIR)/libpcre.la"
+@NOT_ON_WINDOWS@	       $(LIBTOOL) --mode=install $(INSTALL) libpcre.la $(DESTDIR)$(LIBDIR)/libpcre.la
+@NOT_ON_WINDOWS@	       echo "$(LIBTOOL) --mode=install $(INSTALL) libpcreposix.la $(DESTDIR)$(LIBDIR)/libpcreposix.la"
+@NOT_ON_WINDOWS@	       $(LIBTOOL) --mode=install $(INSTALL) libpcreposix.la $(DESTDIR)$(LIBDIR)/libpcreposix.la
+@NOT_ON_WINDOWS@	       $(LIBTOOL) --finish $(DESTDIR)$(LIBDIR)
+		$(mkinstalldirs) $(DESTDIR)$(INCDIR)
+		$(INSTALL_DATA) pcre.h $(DESTDIR)$(INCDIR)/pcre.h
+		$(INSTALL_DATA) $(top_srcdir)/pcreposix.h $(DESTDIR)$(INCDIR)/pcreposix.h
+		$(mkinstalldirs) $(DESTDIR)$(MANDIR)/man3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre.3 $(DESTDIR)$(MANDIR)/man3/pcre.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcreapi.3 $(DESTDIR)$(MANDIR)/man3/pcreapi.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcrebuild.3 $(DESTDIR)$(MANDIR)/man3/pcrebuild.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcrecallout.3 $(DESTDIR)$(MANDIR)/man3/pcrecallout.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcrecompat.3 $(DESTDIR)$(MANDIR)/man3/pcrecompat.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcrepattern.3 $(DESTDIR)$(MANDIR)/man3/pcrepattern.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcreperform.3 $(DESTDIR)$(MANDIR)/man3/pcreperform.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcreposix.3 $(DESTDIR)$(MANDIR)/man3/pcreposix.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcresample.3 $(DESTDIR)$(MANDIR)/man3/pcresample.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_compile.3 $(DESTDIR)$(MANDIR)/man3/pcre_compile.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_config.3 $(DESTDIR)$(MANDIR)/man3/pcre_config.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_copy_named_substring.3 $(DESTDIR)$(MANDIR)/man3/pcre_copy_named_substring.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_copy_substring.3 $(DESTDIR)$(MANDIR)/man3/pcre_copy_substring.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_exec.3 $(DESTDIR)$(MANDIR)/man3/pcre_exec.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_free_substring.3 $(DESTDIR)$(MANDIR)/man3/pcre_free_substring.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_free_substring_list.3 $(DESTDIR)$(MANDIR)/man3/pcre_free_substring_list.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_fullinfo.3 $(DESTDIR)$(MANDIR)/man3/pcre_fullinfo.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_get_named_substring.3 $(DESTDIR)$(MANDIR)/man3/pcre_get_named_substring.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_get_stringnumber.3 $(DESTDIR)$(MANDIR)/man3/pcre_get_stringnumber.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_get_substring.3 $(DESTDIR)$(MANDIR)/man3/pcre_get_substring.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_get_substring_list.3 $(DESTDIR)$(MANDIR)/man3/pcre_get_substring_list.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_info.3 $(DESTDIR)$(MANDIR)/man3/pcre_info.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_maketables.3 $(DESTDIR)$(MANDIR)/man3/pcre_maketables.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_study.3 $(DESTDIR)$(MANDIR)/man3/pcre_study.3
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcre_version.3 $(DESTDIR)$(MANDIR)/man3/pcre_version.3
+		$(mkinstalldirs) $(DESTDIR)$(MANDIR)/man1
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcregrep.1 $(DESTDIR)$(MANDIR)/man1/pcregrep.1
+		$(INSTALL_DATA) $(top_srcdir)/doc/pcretest.1 $(DESTDIR)$(MANDIR)/man1/pcretest.1
+		$(mkinstalldirs) $(DESTDIR)$(BINDIR)
+		$(LIBTOOL) --mode=install $(INSTALL) pcregrep@EXEEXT@ $(DESTDIR)$(BINDIR)/pcregrep@EXEEXT@
+		$(LIBTOOL) --mode=install $(INSTALL) pcretest@EXEEXT@ $(DESTDIR)$(BINDIR)/pcretest@EXEEXT@
+		$(INSTALL) pcre-config $(DESTDIR)$(BINDIR)/pcre-config
+
+# We deliberately omit dftables and chartables.c from 'make clean'; once made
+# chartables.c shouldn't change, and if people have edited the tables by hand,
+# you don't want to throw them away.
+
+clean:;         -rm -rf *.@OBJEXT@ *.lo *.a *.la .libs pcretest@EXEEXT@ pcregrep@EXEEXT@ testtry
+
+# But "make distclean" should get back to a virgin distribution
+
+distclean:      clean
+		-rm -f chartables.c libtool pcre-config pcre.h \
+		Makefile config.h config.status config.log config.cache
+
+check:          runtest
+
+@WIN_PREFIX@pcre.dll : winshared
+	cp .libs/@WIN_PREFIX@pcre.dll .
+
+test:           runtest
+
+runtest:        all @ON_WINDOWS@ @WIN_PREFIX@pcre.dll
+		@./RunTest
+
+# End
diff --git a/external-libs/pcre/NEWS b/external-libs/pcre/NEWS
new file mode 100644
index 00000000..26219749
--- /dev/null
+++ b/external-libs/pcre/NEWS
@@ -0,0 +1,154 @@
+News about PCRE releases
+------------------------
+
+Release 4.5 01-Dec-03
+---------------------
+
+Again mainly a bug-fix and tidying release, with only a couple of new features:
+
+1. It's possible now to compile PCRE so that it does not use recursive
+function calls when matching. Instead it gets memory from the heap. This slows
+things down, but may be necessary on systems with limited stacks.
+
+2. UTF-8 string checking has been tightened to reject overlong sequences and to
+check that a starting offset points to the start of a character. Failure of the
+latter returns a new error code: PCRE_ERROR_BADUTF8_OFFSET.
+
+3. PCRE can now be compiled for systems that use EBCDIC code.
+
+
+Release 4.4 21-Aug-03
+---------------------
+
+This is mainly a bug-fix and tidying release. The only new feature is that PCRE
+checks UTF-8 strings for validity by default. There is an option to suppress
+this, just in case anybody wants that teeny extra bit of performance.
+
+
+Releases 4.1 - 4.3
+------------------
+
+Sorry, I forgot about updating the NEWS file for these releases. Please take a
+look at ChangeLog.
+
+
+Release 4.0 17-Feb-03
+---------------------
+
+There have been a lot of changes for the 4.0 release, adding additional
+functionality and mending bugs. Below is a list of the highlights of the new
+functionality. For full details of these features, please consult the
+documentation. For a complete list of changes, see the ChangeLog file.
+
+1. Support for Perl's \Q...\E escapes.
+
+2. "Possessive quantifiers" ?+, *+, ++, and {,}+ which come from Sun's Java
+package. They provide some syntactic sugar for simple cases of "atomic
+grouping".
+
+3. Support for the \G assertion. It is true when the current matching position
+is at the start point of the match.
+
+4. A new feature that provides some of the functionality that Perl provides
+with (?{...}). The facility is termed a "callout". The way it is done in PCRE
+is for the caller to provide an optional function, by setting pcre_callout to
+its entry point. To get the function called, the regex must include (?C) at
+appropriate points.
+
+5. Support for recursive calls to individual subpatterns. This makes it really
+easy to get totally confused.
+
+6. Support for named subpatterns. The Python syntax (?P<name>...) is used to
+name a group.
+
+7. Several extensions to UTF-8 support; it is now fairly complete. There is an
+option for pcregrep to make it operate in UTF-8 mode.
+
+8. The single man page has been split into a number of separate man pages.
+These also give rise to individual HTML pages which are put in a separate
+directory. There is an index.html page that lists them all. Some hyperlinking
+between the pages has been installed.
+
+
+Release 3.5 15-Aug-01
+---------------------
+
+1. The configuring system has been upgraded to use later versions of autoconf
+and libtool. By default it builds both a shared and a static library if the OS
+supports it. You can use --disable-shared or --disable-static on the configure
+command if you want only one of them.
+
+2. The pcretest utility is now installed along with pcregrep because it is
+useful for users (to test regexs) and by doing this, it automatically gets
+relinked by libtool. The documentation has been turned into a man page, so
+there are now .1, .txt, and .html versions in /doc.
+
+3. Upgrades to pcregrep:
+   (i)   Added long-form option names like gnu grep.
+   (ii)  Added --help to list all options with an explanatory phrase.
+   (iii) Added -r, --recursive to recurse into sub-directories.
+   (iv)  Added -f, --file to read patterns from a file.
+
+4. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure
+script, to force use of CR or LF instead of \n in the source. On non-Unix
+systems, the value can be set in config.h.
+
+5. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an
+absolute limit. Changed the text of the error message to make this clear, and
+likewise updated the man page.
+
+6. The limit of 99 on the number of capturing subpatterns has been removed.
+The new limit is 65535, which I hope will not be a "real" limit.
+
+
+Release 3.3 01-Aug-00
+---------------------
+
+There is some support for UTF-8 character strings. This is incomplete and
+experimental. The documentation describes what is and what is not implemented.
+Otherwise, this is just a bug-fixing release.
+
+
+Release 3.0 01-Feb-00
+---------------------
+
+1. A "configure" script is now used to configure PCRE for Unix systems. It
+builds a Makefile, a config.h file, and the pcre-config script.
+
+2. PCRE is built as a shared library by default.
+
+3. There is support for POSIX classes such as [:alpha:].
+
+5. There is an experimental recursion feature.
+
+----------------------------------------------------------------------------
+          IMPORTANT FOR THOSE UPGRADING FROM VERSIONS BEFORE 2.00
+
+Please note that there has been a change in the API such that a larger
+ovector is required at matching time, to provide some additional workspace.
+The new man page has details. This change was necessary in order to support
+some of the new functionality in Perl 5.005.
+
+          IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.00
+
+Another (I hope this is the last!) change has been made to the API for the
+pcre_compile() function. An additional argument has been added to make it
+possible to pass over a pointer to character tables built in the current
+locale by pcre_maketables(). To use the default tables, this new arguement
+should be passed as NULL.
+
+          IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05
+
+Yet another (and again I hope this really is the last) change has been made
+to the API for the pcre_exec() function. An additional argument has been
+added to make it possible to start the match other than at the start of the
+subject string. This is important if there are lookbehinds. The new man
+page has the details, but you just want to convert existing programs, all
+you need to do is to stick in a new fifth argument to pcre_exec(), with a
+value of zero. For example, change
+
+  pcre_exec(pattern, extra, subject, length, options, ovec, ovecsize)
+to
+  pcre_exec(pattern, extra, subject, length, 0, options, ovec, ovecsize)
+
+****
diff --git a/external-libs/pcre/NON-UNIX-USE b/external-libs/pcre/NON-UNIX-USE
new file mode 100644
index 00000000..c015b214
--- /dev/null
+++ b/external-libs/pcre/NON-UNIX-USE
@@ -0,0 +1,122 @@
+Compiling PCRE on non-Unix systems
+----------------------------------
+
+See below for comments on Cygwin or MinGW usage. I (Philip Hazel) have no
+knowledge of Windows sytems and how their libraries work. The items in the
+PCRE Makefile that relate to anything other than Unix-like systems have been
+contributed by PCRE users. There are some other comments and files in the
+Contrib directory on the ftp site that you may find useful.
+
+The following are generic comments about building PCRE:
+
+If you want to compile PCRE for a non-Unix system (or perhaps, more strictly,
+for a system that does not support "configure" and make files), note that PCRE
+consists entirely of code written in Standard C, and so should compile
+successfully on any machine with a Standard C compiler and library, using
+normal compiling commands to do the following:
+
+(1) Copy or rename the file config.in as config.h, and change the macros that
+define HAVE_STRERROR and HAVE_MEMMOVE to define them as 1 rather than 0.
+Unfortunately, because of the way Unix autoconf works, the default setting has
+to be 0. You may also want to make changes to other macros in config.h. In
+particular, if you want to force a specific value for newline, you can define
+the NEWLINE macro. The default is to use '\n', thereby using whatever value
+your compiler gives to '\n'.
+
+(2) Copy or rename the file pcre.in as pcre.h, and change the macro definitions
+for PCRE_MAJOR, PCRE_MINOR, and PCRE_DATE near its start to the values set in
+configure.in.
+
+(3) Compile dftables.c as a stand-alone program, and then run it with
+the single argument "chartables.c". This generates a set of standard
+character tables and writes them to that file.
+
+(4) Compile maketables.c, get.c, study.c and pcre.c and link them all
+together into an object library in whichever form your system keeps such
+libraries. This is the pcre library (chartables.c is included by means of an
+#include directive). If your system has static and shared libraries, you may
+have to do this once for each type.
+
+(5) Similarly, compile pcreposix.c and link it (on its own) as the pcreposix
+library.
+
+(6) Compile the test program pcretest.c. This needs the functions in the
+pcre and pcreposix libraries when linking.
+
+(7) Run pcretest on the testinput files in the testdata directory, and check
+that the output matches the corresponding testoutput files. You must use the
+-i option when checking testinput2. Note that the supplied files are in Unix
+format, with just LF characters as line terminators. You may need to edit them
+to change this if your system uses a different convention.
+
+If you have a system without "configure" but where you can use a Makefile, edit
+Makefile.in to create Makefile, substituting suitable values for the variables
+at the head of the file.
+
+Some help in building a Win32 DLL of PCRE in GnuWin32 environments was
+contributed by Paul Sokolovsky. These environments are Mingw32
+(http://www.xraylith.wisc.edu/~khan/software/gnu-win32/) and CygWin
+(http://sourceware.cygnus.com/cygwin/). Paul comments:
+
+  For CygWin, set CFLAGS=-mno-cygwin, and do 'make dll'. You'll get
+  pcre.dll (containing pcreposix also), libpcre.dll.a, and dynamically
+  linked pgrep and pcretest. If you have /bin/sh, run RunTest (three
+  main test go ok, locale not supported).
+
+Changes to do MinGW with autoconf 2.50 were supplied by Fred Cox
+<sailorFred@yahoo.com>, who comments as follows:
+
+  If you are using the PCRE DLL, the normal Unix style configure && make &&
+  make check && make install should just work[*]. If you want to statically
+  link against the .a file, you must define PCRE_STATIC before including
+  pcre.h, otherwise the pcre_malloc and pcre_free exported functions will be
+  declared __declspec(dllimport), with hilarious results.  See the configure.in
+  and pcretest.c for how it is done for the static test.
+
+  Also, there will only be a libpcre.la, not a libpcreposix.la, as you
+  would expect from the Unix version. The single DLL includes the pcreposix
+  interface.
+
+[*] But note that the supplied test files are in Unix format, with just LF
+characters as line terminators. You will have to edit them to change to CR LF
+terminators.
+
+A script for building PCRE using Borland's C++ compiler for use with VPASCAL
+was contributed by Alexander Tokarev. It is called makevp.bat.
+
+These are some further comments about Win32 builds from Mark Evans. They
+were contributed before Fred Cox's changes were made, so it is possible that
+they may no longer be relevant.
+
+"The documentation for Win32 builds is a bit shy.  Under MSVC6 I
+followed their instructions to the letter, but there were still
+some things missing.
+
+(1) Must #define STATIC for entire project if linking statically.
+    (I see no reason to use DLLs for code this compact.)  This of
+    course is a project setting in MSVC under Preprocessor.
+
+(2) Missing some #ifdefs relating to the function pointers
+    pcre_malloc and pcre_free.  See my solution below.  (The stubs
+    may not be mandatory but they made me feel better.)"
+
+=========================
+#ifdef _WIN32
+#include <malloc.h>
+
+void* malloc_stub(size_t N)
+{ return malloc(N); }
+void free_stub(void* p)
+{ free(p); }
+void *(*pcre_malloc)(size_t) = &malloc_stub;
+void  (*pcre_free)(void *) = &free_stub;
+
+#else
+
+void *(*pcre_malloc)(size_t) = malloc;
+void  (*pcre_free)(void *) = free;
+
+#endif
+=========================
+
+****
diff --git a/external-libs/pcre/README b/external-libs/pcre/README
new file mode 100644
index 00000000..879ba04f
--- /dev/null
+++ b/external-libs/pcre/README
@@ -0,0 +1,365 @@
+README file for PCRE (Perl-compatible regular expression library)
+-----------------------------------------------------------------
+
+The latest release of PCRE is always available from
+
+  ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-xxx.tar.gz
+
+Please read the NEWS file if you are upgrading from a previous release.
+
+PCRE has its own native API, but a set of "wrapper" functions that are based on
+the POSIX API are also supplied in the library libpcreposix. Note that this
+just provides a POSIX calling interface to PCRE: the regular expressions
+themselves still follow Perl syntax and semantics. The header file
+for the POSIX-style functions is called pcreposix.h. The official POSIX name is
+regex.h, but I didn't want to risk possible problems with existing files of
+that name by distributing it that way. To use it with an existing program that
+uses the POSIX API, it will have to be renamed or pointed at by a link.
+
+If you are using the POSIX interface to PCRE and there is already a POSIX regex
+library installed on your system, you must take care when linking programs to
+ensure that they link with PCRE's libpcreposix library. Otherwise they may pick
+up the "real" POSIX functions of the same name.
+
+
+Contributions by users of PCRE
+------------------------------
+
+You can find contributions from PCRE users in the directory
+
+  ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/Contrib
+
+where there is also a README file giving brief descriptions of what they are.
+Several of them provide support for compiling PCRE on various flavours of
+Windows systems (I myself do not use Windows). Some are complete in themselves;
+others are pointers to URLs containing relevant files.
+
+
+Building PCRE on a Unix-like system
+-----------------------------------
+
+To build PCRE on a Unix-like system, first run the "configure" command from the
+PCRE distribution directory, with your current directory set to the directory
+where you want the files to be created. This command is a standard GNU
+"autoconf" configuration script, for which generic instructions are supplied in
+INSTALL.
+
+Most commonly, people build PCRE within its own distribution directory, and in
+this case, on many systems, just running "./configure" is sufficient, but the
+usual methods of changing standard defaults are available. For example,
+
+CFLAGS='-O2 -Wall' ./configure --prefix=/opt/local
+
+specifies that the C compiler should be run with the flags '-O2 -Wall' instead
+of the default, and that "make install" should install PCRE under /opt/local
+instead of the default /usr/local.
+
+If you want to build in a different directory, just run "configure" with that
+directory as current. For example, suppose you have unpacked the PCRE source
+into /source/pcre/pcre-xxx, but you want to build it in /build/pcre/pcre-xxx:
+
+cd /build/pcre/pcre-xxx
+/source/pcre/pcre-xxx/configure
+
+There are some optional features that can be included or omitted from the PCRE
+library. You can read more about them in the pcrebuild man page.
+
+. If you want to make use of the support for UTF-8 character strings in PCRE,
+  you must add --enable-utf8 to the "configure" command. Without it, the code
+  for handling UTF-8 is not included in the library. (Even when included, it
+  still has to be enabled by an option at run time.)
+
+. You can build PCRE to recognized CR or NL as the newline character, instead
+  of whatever your compiler uses for "\n", by adding --newline-is-cr or
+  --newline-is-nl to the "configure" command, respectively. Only do this if you
+  really understand what you are doing. On traditional Unix-like systems, the
+  newline character is NL.
+
+. When called via the POSIX interface, PCRE uses malloc() to get additional
+  storage for processing capturing parentheses if there are more than 10 of
+  them. You can increase this threshold by setting, for example,
+
+  --with-posix-malloc-threshold=20
+
+  on the "configure" command.
+
+. PCRE has a counter which can be set to limit the amount of resources it uses.
+  If the limit is exceeded during a match, the match fails. The default is ten
+  million. You can change the default by setting, for example,
+
+  --with-match-limit=500000
+
+  on the "configure" command. This is just the default; individual calls to
+  pcre_exec() can supply their own value. There is discussion on the pcreapi
+  man page.
+
+. The default maximum compiled pattern size is around 64K. You can increase
+  this by adding --with-link-size=3 to the "configure" command. You can
+  increase it even more by setting --with-link-size=4, but this is unlikely
+  ever to be necessary. If you build PCRE with an increased link size, test 2
+  (and 5 if you are using UTF-8) will fail. Part of the output of these tests
+  is a representation of the compiled pattern, and this changes with the link
+  size.
+
+. You can build PCRE so that its match() function does not call itself
+  recursively. Instead, it uses blocks of data from the heap via special
+  functions pcre_stack_malloc() and pcre_stack_free() to save data that would
+  otherwise be saved on the stack. To build PCRE like this, use
+
+  --disable-stack-for-recursion
+
+  on the "configure" command. PCRE runs more slowly in this mode, but it may be
+  necessary in environments with limited stack sizes.
+
+The "configure" script builds five files:
+
+. libtool is a script that builds shared and/or static libraries
+. Makefile is built by copying Makefile.in and making substitutions.
+. config.h is built by copying config.in and making substitutions.
+. pcre-config is built by copying pcre-config.in and making substitutions.
+. RunTest is a script for running tests
+
+Once "configure" has run, you can run "make". It builds two libraries called
+libpcre and libpcreposix, a test program called pcretest, and the pcregrep
+command. You can use "make install" to copy these, the public header files
+pcre.h and pcreposix.h, and the man pages to appropriate live directories on
+your system, in the normal way.
+
+Running "make install" also installs the command pcre-config, which can be used
+to recall information about the PCRE configuration and installation. For
+example,
+
+  pcre-config --version
+
+prints the version number, and
+
+ pcre-config --libs
+
+outputs information about where the library is installed. This command can be
+included in makefiles for programs that use PCRE, saving the programmer from
+having to remember too many details.
+
+
+Shared libraries on Unix-like systems
+-------------------------------------
+
+The default distribution builds PCRE as two shared libraries and two static
+libraries, as long as the operating system supports shared libraries. Shared
+library support relies on the "libtool" script which is built as part of the
+"configure" process.
+
+The libtool script is used to compile and link both shared and static
+libraries. They are placed in a subdirectory called .libs when they are newly
+built. The programs pcretest and pcregrep are built to use these uninstalled
+libraries (by means of wrapper scripts in the case of shared libraries). When
+you use "make install" to install shared libraries, pcregrep and pcretest are
+automatically re-built to use the newly installed shared libraries before being
+installed themselves. However, the versions left in the source directory still
+use the uninstalled libraries.
+
+To build PCRE using static libraries only you must use --disable-shared when
+configuring it. For example
+
+./configure --prefix=/usr/gnu --disable-shared
+
+Then run "make" in the usual way. Similarly, you can use --disable-static to
+build only shared libraries.
+
+
+Cross-compiling on a Unix-like system
+-------------------------------------
+
+You can specify CC and CFLAGS in the normal way to the "configure" command, in
+order to cross-compile PCRE for some other host. However, during the building
+process, the dftables.c source file is compiled *and run* on the local host, in
+order to generate the default character tables (the chartables.c file). It
+therefore needs to be compiled with the local compiler, not the cross compiler.
+You can do this by specifying CC_FOR_BUILD (and if necessary CFLAGS_FOR_BUILD)
+when calling the "configure" command. If they are not specified, they default
+to the values of CC and CFLAGS.
+
+
+Building on non-Unix systems
+----------------------------
+
+For a non-Unix system, read the comments in the file NON-UNIX-USE, though if
+the system supports the use of "configure" and "make" you may be able to build
+PCRE in the same way as for Unix systems.
+
+PCRE has been compiled on Windows systems and on Macintoshes, but I don't know
+the details because I don't use those systems. It should be straightforward to
+build PCRE on any system that has a Standard C compiler, because it uses only
+Standard C functions.
+
+
+Testing PCRE
+------------
+
+To test PCRE on a Unix system, run the RunTest script that is created by the
+configuring process. (This can also be run by "make runtest", "make check", or
+"make test".) For other systems, see the instructions in NON-UNIX-USE.
+
+The script runs the pcretest test program (which is documented in its own man
+page) on each of the testinput files (in the testdata directory) in turn,
+and compares the output with the contents of the corresponding testoutput file.
+A file called testtry is used to hold the output from pcretest. To run pcretest
+on just one of the test files, give its number as an argument to RunTest, for
+example:
+
+  RunTest 2
+
+The first file can also be fed directly into the perltest script to check that
+Perl gives the same results. The only difference you should see is in the first
+few lines, where the Perl version is given instead of the PCRE version.
+
+The second set of tests check pcre_fullinfo(), pcre_info(), pcre_study(),
+pcre_copy_substring(), pcre_get_substring(), pcre_get_substring_list(), error
+detection, and run-time flags that are specific to PCRE, as well as the POSIX
+wrapper API. It also uses the debugging flag to check some of the internals of
+pcre_compile().
+
+If you build PCRE with a locale setting that is not the standard C locale, the
+character tables may be different (see next paragraph). In some cases, this may
+cause failures in the second set of tests. For example, in a locale where the
+isprint() function yields TRUE for characters in the range 128-255, the use of
+[:isascii:] inside a character class defines a different set of characters, and
+this shows up in this test as a difference in the compiled code, which is being
+listed for checking. Where the comparison test output contains [\x00-\x7f] the
+test will contain [\x00-\xff], and similarly in some other cases. This is not a
+bug in PCRE.
+
+The third set of tests checks pcre_maketables(), the facility for building a
+set of character tables for a specific locale and using them instead of the
+default tables. The tests make use of the "fr_FR" (French) locale. Before
+running the test, the script checks for the presence of this locale by running
+the "locale" command. If that command fails, or if it doesn't include "fr_FR"
+in the list of available locales, the third test cannot be run, and a comment
+is output to say why. If running this test produces instances of the error
+
+  ** Failed to set locale "fr_FR"
+
+in the comparison output, it means that locale is not available on your system,
+despite being listed by "locale". This does not mean that PCRE is broken.
+
+The fourth test checks the UTF-8 support. It is not run automatically unless
+PCRE is built with UTF-8 support. To do this you must set --enable-utf8 when
+running "configure". This file can be also fed directly to the perltest script,
+provided you are running Perl 5.8 or higher. (For Perl 5.6, a small patch,
+commented in the script, can be be used.)
+
+The fifth and final file tests error handling with UTF-8 encoding, and internal
+UTF-8 features of PCRE that are not relevant to Perl.
+
+
+Character tables
+----------------
+
+PCRE uses four tables for manipulating and identifying characters. The final
+argument of the pcre_compile() function is a pointer to a block of memory
+containing the concatenated tables. A call to pcre_maketables() can be used to
+generate a set of tables in the current locale. If the final argument for
+pcre_compile() is passed as NULL, a set of default tables that is built into
+the binary is used.
+
+The source file called chartables.c contains the default set of tables. This is
+not supplied in the distribution, but is built by the program dftables
+(compiled from dftables.c), which uses the ANSI C character handling functions
+such as isalnum(), isalpha(), isupper(), islower(), etc. to build the table
+sources. This means that the default C locale which is set for your system will
+control the contents of these default tables. You can change the default tables
+by editing chartables.c and then re-building PCRE. If you do this, you should
+probably also edit Makefile to ensure that the file doesn't ever get
+re-generated.
+
+The first two 256-byte tables provide lower casing and case flipping functions,
+respectively. The next table consists of three 32-byte bit maps which identify
+digits, "word" characters, and white space, respectively. These are used when
+building 32-byte bit maps that represent character classes.
+
+The final 256-byte table has bits indicating various character types, as
+follows:
+
+    1   white space character
+    2   letter
+    4   decimal digit
+    8   hexadecimal digit
+   16   alphanumeric or '_'
+  128   regular expression metacharacter or binary zero
+
+You should not alter the set of characters that contain the 128 bit, as that
+will cause PCRE to malfunction.
+
+
+Manifest
+--------
+
+The distribution should contain the following files:
+
+(A) The actual source files of the PCRE library functions and their
+    headers:
+
+  dftables.c            auxiliary program for building chartables.c
+  get.c                 )
+  maketables.c          )
+  study.c               ) source of
+  pcre.c                )   the functions
+  pcreposix.c           )
+  printint.c            )
+  pcre.in               "source" for the header for the external API; pcre.h
+                          is built from this by "configure"
+  pcreposix.h           header for the external POSIX wrapper API
+  internal.h            header for internal use
+  config.in             template for config.h, which is built by configure
+
+(B) Auxiliary files:
+
+  AUTHORS               information about the author of PCRE
+  ChangeLog             log of changes to the code
+  INSTALL               generic installation instructions
+  LICENCE               conditions for the use of PCRE
+  COPYING               the same, using GNU's standard name
+  Makefile.in           template for Unix Makefile, which is built by configure
+  NEWS                  important changes in this release
+  NON-UNIX-USE          notes on building PCRE on non-Unix systems
+  README                this file
+  RunTest.in            template for a Unix shell script for running tests
+  config.guess          ) files used by libtool,
+  config.sub            )   used only when building a shared library
+  configure             a configuring shell script (built by autoconf)
+  configure.in          the autoconf input used to build configure
+  doc/Tech.Notes        notes on the encoding
+  doc/*.3               man page sources for the PCRE functions
+  doc/*.1               man page sources for pcregrep and pcretest
+  doc/html/*            HTML documentation
+  doc/pcre.txt          plain text version of the man pages
+  doc/pcretest.txt      plain text documentation of test program
+  doc/perltest.txt      plain text documentation of Perl test program
+  install-sh            a shell script for installing files
+  ltmain.sh             file used to build a libtool script
+  pcretest.c            comprehensive test program
+  pcredemo.c            simple demonstration of coding calls to PCRE
+  perltest              Perl test program
+  pcregrep.c            source of a grep utility that uses PCRE
+  pcre-config.in        source of script which retains PCRE information
+  testdata/testinput1   test data, compatible with Perl
+  testdata/testinput2   test data for error messages and non-Perl things
+  testdata/testinput3   test data for locale-specific tests
+  testdata/testinput4   test data for UTF-8 tests compatible with Perl
+  testdata/testinput5   test data for other UTF-8 tests
+  testdata/testoutput1  test results corresponding to testinput1
+  testdata/testoutput2  test results corresponding to testinput2
+  testdata/testoutput3  test results corresponding to testinput3
+  testdata/testoutput4  test results corresponding to testinput4
+  testdata/testoutput5  test results corresponding to testinput5
+
+(C) Auxiliary files for Win32 DLL
+
+  dll.mk
+  pcre.def
+
+(D) Auxiliary file for VPASCAL
+
+  makevp.bat
+
+Philip Hazel <ph10@cam.ac.uk>
+December 2003
diff --git a/external-libs/pcre/RunTest.in b/external-libs/pcre/RunTest.in
new file mode 100644
index 00000000..f203ac71
--- /dev/null
+++ b/external-libs/pcre/RunTest.in
@@ -0,0 +1,139 @@
+#! /bin/sh
+
+# This file is generated by configure from RunTest.in. Make any changes
+# to that file.
+
+# Run PCRE tests
+
+cf=diff
+testdata=@top_srcdir@/testdata
+
+# Select which tests to run; if no selection, run all
+
+do1=no
+do2=no
+do3=no
+do4=no
+do5=no
+
+while [ $# -gt 0 ] ; do
+  case $1 in
+    1) do1=yes;;
+    2) do2=yes;;
+    3) do3=yes;;
+    4) do4=yes;;
+    5) do5=yes;; 
+    *) echo "Unknown test number $1"; exit 1;;
+  esac
+  shift
+done
+
+if [ "@UTF8@" = "" ] ; then
+  if [ $do4 = yes ] ; then
+    echo "Can't run test 4 because UFT8 support is not configured"
+    exit 1
+  fi   
+  if [ $do5 = yes ] ; then
+    echo "Can't run test 5 because UFT8 support is not configured"
+    exit 1
+  fi   
+fi    
+
+if [ $do1 = no -a $do2 = no -a $do3 = no -a $do4 = no -a\
+     $do5 = no ] ; then
+  do1=yes
+  do2=yes
+  do3=yes
+  if [ "@UTF8@" != "" ] ; then do4=yes; fi
+  if [ "@UTF8@" != "" ] ; then do5=yes; fi
+fi
+
+# Show which release
+
+./pcretest /dev/null
+
+# Primary test, Perl-compatible
+
+if [ $do1 = yes ] ; then
+  echo "Testing main functionality (Perl compatible)"
+  ./pcretest $testdata/testinput1 testtry
+  if [ $? = 0 ] ; then
+    $cf testtry $testdata/testoutput1
+    if [ $? != 0 ] ; then exit 1; fi
+    echo " " 
+  else exit 1
+  fi
+fi
+
+# PCRE tests that are not Perl-compatible - API & error tests, mostly
+
+if [ $do2 = yes ] ; then
+  echo "Testing API and error handling (not Perl compatible)"
+  ./pcretest -i $testdata/testinput2 testtry
+  if [ $? = 0 ] ; then
+    $cf testtry $testdata/testoutput2
+    if [ $? != 0 ] ; then exit 1; fi
+  else exit 1
+  fi
+fi
+
+if [ $do1 = yes -a $do2 = yes ] ; then
+  echo " " 
+  echo "The two main tests ran OK"
+  echo " " 
+fi
+
+# Locale-specific tests, provided the "fr_FR" locale is available
+
+if [ $do3 = yes ] ; then
+  locale -a | grep '^fr_FR$' >/dev/null
+  if [ $? -eq 0 ] ; then
+    echo "Testing locale-specific features (using 'fr_FR' locale)"
+    ./pcretest $testdata/testinput3 testtry
+    if [ $? = 0 ] ; then
+      $cf testtry $testdata/testoutput3
+      if [ $? != 0 ] ; then 
+        echo " "
+        echo "Locale test did not run entirely successfully."
+        echo "This usually means that there is a problem with the locale"
+        echo "settings rather than a bug in PCRE."    
+      else
+      echo "Locale test ran OK" 
+      fi 
+      echo " " 
+    else exit 1
+    fi
+  else
+    echo "Cannot test locale-specific features - 'fr_FR' locale not found,"
+    echo "or the \"locale\" command is not available to check for it."
+    echo " " 
+  fi
+fi
+
+# Additional tests for UTF8 support
+
+if [ $do4 = yes ] ; then
+  echo "Testing UTF-8 support (Perl compatible)"
+  ./pcretest $testdata/testinput4 testtry 
+  if [ $? = 0 ] ; then
+    $cf testtry $testdata/testoutput4
+    if [ $? != 0 ] ; then exit 1; fi
+  else exit 1
+  fi
+  echo "UTF8 test ran OK"
+  echo " "
+fi
+
+if [ $do5 = yes ] ; then
+  echo "Testing API and internals for UTF-8 support (not Perl compatible)"
+  ./pcretest $testdata/testinput5 testtry 
+  if [ $? = 0 ] ; then
+    $cf testtry $testdata/testoutput5
+    if [ $? != 0 ] ; then exit 1; fi
+  else exit 1
+  fi
+  echo "UTF8 internals test ran OK"
+  echo " "
+fi
+
+# End
diff --git a/external-libs/pcre/config.guess b/external-libs/pcre/config.guess
new file mode 100644
index 00000000..9b1384be
--- /dev/null
+++ b/external-libs/pcre/config.guess
@@ -0,0 +1,1400 @@
+#! /bin/sh
+# Attempt to guess a canonical system name.
+#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+#   2000, 2001, 2002 Free Software Foundation, Inc.
+
+timestamp='2002-11-30'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Per Bothner <per@bothner.com>.
+# Please send patches to <config-patches@gnu.org>.  Submit a context
+# diff and a properly formatted ChangeLog entry.
+#
+# This script attempts to guess a canonical system name similar to
+# config.sub.  If it succeeds, it prints the system name on stdout, and
+# exits with 0.  Otherwise, it exits with 1.
+#
+# The plan is that this can be called by configure scripts if you
+# don't specify an explicit build system type.
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION]
+
+Output the configuration name of the system \`$me' is run on.
+
+Operation modes:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.guess ($timestamp)
+
+Originally written by Per Bothner.
+Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit 0 ;;
+    --version | -v )
+       echo "$version" ; exit 0 ;;
+    --help | --h* | -h )
+       echo "$usage"; exit 0 ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help" >&2
+       exit 1 ;;
+    * )
+       break ;;
+  esac
+done
+
+if test $# != 0; then
+  echo "$me: too many arguments$help" >&2
+  exit 1
+fi
+
+trap 'exit 1' 1 2 15
+
+# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
+# compiler to aid in system detection is discouraged as it requires
+# temporary files to be created and, as you can see below, it is a
+# headache to deal with in a portable fashion.
+
+# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
+# use `HOST_CC' if defined, but it is deprecated.
+
+# This shell variable is my proudest work .. or something. --bje
+
+set_cc_for_build='tmpdir=${TMPDIR-/tmp}/config-guess-$$ ;
+(old=`umask` && umask 077 && mkdir $tmpdir && umask $old && unset old)
+   || (echo "$me: cannot create $tmpdir" >&2 && exit 1) ;
+dummy=$tmpdir/dummy ;
+files="$dummy.c $dummy.o $dummy.rel $dummy" ;
+trap '"'"'rm -f $files; rmdir $tmpdir; exit 1'"'"' 1 2 15 ;
+case $CC_FOR_BUILD,$HOST_CC,$CC in
+ ,,)    echo "int x;" > $dummy.c ;
+	for c in cc gcc c89 c99 ; do
+	  if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then
+	     CC_FOR_BUILD="$c"; break ;
+	  fi ;
+	done ;
+	rm -f $files ;
+	if test x"$CC_FOR_BUILD" = x ; then
+	  CC_FOR_BUILD=no_compiler_found ;
+	fi
+	;;
+ ,,*)   CC_FOR_BUILD=$CC ;;
+ ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
+esac ;
+unset files'
+
+# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
+# (ghazi@noc.rutgers.edu 1994-08-24)
+if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
+	PATH=$PATH:/.attbin ; export PATH
+fi
+
+UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
+UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+
+# Note: order is significant - the case branches are not exclusive.
+
+case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
+    *:NetBSD:*:*)
+	# NetBSD (nbsd) targets should (where applicable) match one or
+	# more of the tupples: *-*-netbsdelf*, *-*-netbsdaout*,
+	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
+	# switched to ELF, *-*-netbsd* would select the old
+	# object file format.  This provides both forward
+	# compatibility and a consistent mechanism for selecting the
+	# object file format.
+	#
+	# Note: NetBSD doesn't particularly care about the vendor
+	# portion of the name.  We always set it to "unknown".
+	sysctl="sysctl -n hw.machine_arch"
+	UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \
+	    /usr/sbin/$sysctl 2>/dev/null || echo unknown)`
+	case "${UNAME_MACHINE_ARCH}" in
+	    armeb) machine=armeb-unknown ;;
+	    arm*) machine=arm-unknown ;;
+	    sh3el) machine=shl-unknown ;;
+	    sh3eb) machine=sh-unknown ;;
+	    *) machine=${UNAME_MACHINE_ARCH}-unknown ;;
+	esac
+	# The Operating System including object format, if it has switched
+	# to ELF recently, or will in the future.
+	case "${UNAME_MACHINE_ARCH}" in
+	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
+		eval $set_cc_for_build
+		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
+			| grep __ELF__ >/dev/null
+		then
+		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
+		    # Return netbsd for either.  FIX?
+		    os=netbsd
+		else
+		    os=netbsdelf
+		fi
+		;;
+	    *)
+	        os=netbsd
+		;;
+	esac
+	# The OS release
+	# Debian GNU/NetBSD machines have a different userland, and
+	# thus, need a distinct triplet. However, they do not need
+	# kernel version information, so it can be replaced with a
+	# suitable tag, in the style of linux-gnu.
+	case "${UNAME_VERSION}" in
+	    Debian*)
+		release='-gnu'
+		;;
+	    *)
+		release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+		;;
+	esac
+	# Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
+	# contains redundant information, the shorter form:
+	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
+	echo "${machine}-${os}${release}"
+	exit 0 ;;
+    amiga:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    arc:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    hp300:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mac68k:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    macppc:OpenBSD:*:*)
+	echo powerpc-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mvme68k:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mvme88k:OpenBSD:*:*)
+	echo m88k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mvmeppc:OpenBSD:*:*)
+	echo powerpc-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    pmax:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    sgi:OpenBSD:*:*)
+	echo mipseb-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    sun3:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    wgrisc:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    *:OpenBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    alpha:OSF1:*:*)
+	if test $UNAME_RELEASE = "V4.0"; then
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+	fi
+	# A Vn.n version is a released version.
+	# A Tn.n version is a released field test version.
+	# A Xn.n version is an unreleased experimental baselevel.
+	# 1.2 uses "1.2" for uname -r.
+	eval $set_cc_for_build
+	cat <<EOF >$dummy.s
+	.data
+\$Lformat:
+	.byte 37,100,45,37,120,10,0	# "%d-%x\n"
+
+	.text
+	.globl main
+	.align 4
+	.ent main
+main:
+	.frame \$30,16,\$26,0
+	ldgp \$29,0(\$27)
+	.prologue 1
+	.long 0x47e03d80 # implver \$0
+	lda \$2,-1
+	.long 0x47e20c21 # amask \$2,\$1
+	lda \$16,\$Lformat
+	mov \$0,\$17
+	not \$1,\$18
+	jsr \$26,printf
+	ldgp \$29,0(\$26)
+	mov 0,\$16
+	jsr \$26,exit
+	.end main
+EOF
+	$CC_FOR_BUILD -o $dummy $dummy.s 2>/dev/null
+	if test "$?" = 0 ; then
+		case `$dummy` in
+			0-0)
+				UNAME_MACHINE="alpha"
+				;;
+			1-0)
+				UNAME_MACHINE="alphaev5"
+				;;
+			1-1)
+				UNAME_MACHINE="alphaev56"
+				;;
+			1-101)
+				UNAME_MACHINE="alphapca56"
+				;;
+			2-303)
+				UNAME_MACHINE="alphaev6"
+				;;
+			2-307)
+				UNAME_MACHINE="alphaev67"
+				;;
+			2-1307)
+				UNAME_MACHINE="alphaev68"
+				;;
+			3-1307)
+				UNAME_MACHINE="alphaev7"
+				;;
+		esac
+	fi
+	rm -f $dummy.s $dummy && rmdir $tmpdir
+	echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[VTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+	exit 0 ;;
+    Alpha\ *:Windows_NT*:*)
+	# How do we know it's Interix rather than the generic POSIX subsystem?
+	# Should we change UNAME_MACHINE based on the output of uname instead
+	# of the specific Alpha model?
+	echo alpha-pc-interix
+	exit 0 ;;
+    21064:Windows_NT:50:3)
+	echo alpha-dec-winnt3.5
+	exit 0 ;;
+    Amiga*:UNIX_System_V:4.0:*)
+	echo m68k-unknown-sysv4
+	exit 0;;
+    *:[Aa]miga[Oo][Ss]:*:*)
+	echo ${UNAME_MACHINE}-unknown-amigaos
+	exit 0 ;;
+    *:[Mm]orph[Oo][Ss]:*:*)
+	echo ${UNAME_MACHINE}-unknown-morphos
+	exit 0 ;;
+    *:OS/390:*:*)
+	echo i370-ibm-openedition
+	exit 0 ;;
+    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
+	echo arm-acorn-riscix${UNAME_RELEASE}
+	exit 0;;
+    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
+	echo hppa1.1-hitachi-hiuxmpp
+	exit 0;;
+    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
+	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
+	if test "`(/bin/universe) 2>/dev/null`" = att ; then
+		echo pyramid-pyramid-sysv3
+	else
+		echo pyramid-pyramid-bsd
+	fi
+	exit 0 ;;
+    NILE*:*:*:dcosx)
+	echo pyramid-pyramid-svr4
+	exit 0 ;;
+    DRS?6000:UNIX_SV:4.2*:7*)
+	case `/usr/bin/uname -p` in
+	    sparc) echo sparc-icl-nx7 && exit 0 ;;
+	esac ;;
+    sun4H:SunOS:5.*:*)
+	echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
+	echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    i86pc:SunOS:5.*:*)
+	echo i386-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    sun4*:SunOS:6*:*)
+	# According to config.sub, this is the proper way to canonicalize
+	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
+	# it's likely to be more like Solaris than SunOS4.
+	echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    sun4*:SunOS:*:*)
+	case "`/usr/bin/arch -k`" in
+	    Series*|S4*)
+		UNAME_RELEASE=`uname -v`
+		;;
+	esac
+	# Japanese Language versions have a version number like `4.1.3-JL'.
+	echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
+	exit 0 ;;
+    sun3*:SunOS:*:*)
+	echo m68k-sun-sunos${UNAME_RELEASE}
+	exit 0 ;;
+    sun*:*:4.2BSD:*)
+	UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
+	case "`/bin/arch`" in
+	    sun3)
+		echo m68k-sun-sunos${UNAME_RELEASE}
+		;;
+	    sun4)
+		echo sparc-sun-sunos${UNAME_RELEASE}
+		;;
+	esac
+	exit 0 ;;
+    aushp:SunOS:*:*)
+	echo sparc-auspex-sunos${UNAME_RELEASE}
+	exit 0 ;;
+    # The situation for MiNT is a little confusing.  The machine name
+    # can be virtually everything (everything which is not
+    # "atarist" or "atariste" at least should have a processor
+    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
+    # to the lowercase version "mint" (or "freemint").  Finally
+    # the system name "TOS" denotes a system which is actually not
+    # MiNT.  But MiNT is downward compatible to TOS, so this should
+    # be no problem.
+    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
+        echo m68k-atari-mint${UNAME_RELEASE}
+	exit 0 ;;
+    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
+	echo m68k-atari-mint${UNAME_RELEASE}
+        exit 0 ;;
+    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
+        echo m68k-atari-mint${UNAME_RELEASE}
+	exit 0 ;;
+    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
+        echo m68k-milan-mint${UNAME_RELEASE}
+        exit 0 ;;
+    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
+        echo m68k-hades-mint${UNAME_RELEASE}
+        exit 0 ;;
+    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
+        echo m68k-unknown-mint${UNAME_RELEASE}
+        exit 0 ;;
+    powerpc:machten:*:*)
+	echo powerpc-apple-machten${UNAME_RELEASE}
+	exit 0 ;;
+    RISC*:Mach:*:*)
+	echo mips-dec-mach_bsd4.3
+	exit 0 ;;
+    RISC*:ULTRIX:*:*)
+	echo mips-dec-ultrix${UNAME_RELEASE}
+	exit 0 ;;
+    VAX*:ULTRIX*:*:*)
+	echo vax-dec-ultrix${UNAME_RELEASE}
+	exit 0 ;;
+    2020:CLIX:*:* | 2430:CLIX:*:*)
+	echo clipper-intergraph-clix${UNAME_RELEASE}
+	exit 0 ;;
+    mips:*:*:UMIPS | mips:*:*:RISCos)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+#ifdef __cplusplus
+#include <stdio.h>  /* for printf() prototype */
+	int main (int argc, char *argv[]) {
+#else
+	int main (argc, argv) int argc; char *argv[]; {
+#endif
+	#if defined (host_mips) && defined (MIPSEB)
+	#if defined (SYSTYPE_SYSV)
+	  printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_SVR4)
+	  printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
+	  printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
+	#endif
+	#endif
+	  exit (-1);
+	}
+EOF
+	$CC_FOR_BUILD -o $dummy $dummy.c \
+	  && $dummy `echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` \
+	  && rm -f $dummy.c $dummy && rmdir $tmpdir && exit 0
+	rm -f $dummy.c $dummy && rmdir $tmpdir
+	echo mips-mips-riscos${UNAME_RELEASE}
+	exit 0 ;;
+    Motorola:PowerMAX_OS:*:*)
+	echo powerpc-motorola-powermax
+	exit 0 ;;
+    Motorola:*:4.3:PL8-*)
+	echo powerpc-harris-powermax
+	exit 0 ;;
+    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
+	echo powerpc-harris-powermax
+	exit 0 ;;
+    Night_Hawk:Power_UNIX:*:*)
+	echo powerpc-harris-powerunix
+	exit 0 ;;
+    m88k:CX/UX:7*:*)
+	echo m88k-harris-cxux7
+	exit 0 ;;
+    m88k:*:4*:R4*)
+	echo m88k-motorola-sysv4
+	exit 0 ;;
+    m88k:*:3*:R3*)
+	echo m88k-motorola-sysv3
+	exit 0 ;;
+    AViiON:dgux:*:*)
+        # DG/UX returns AViiON for all architectures
+        UNAME_PROCESSOR=`/usr/bin/uname -p`
+	if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ]
+	then
+	    if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \
+	       [ ${TARGET_BINARY_INTERFACE}x = x ]
+	    then
+		echo m88k-dg-dgux${UNAME_RELEASE}
+	    else
+		echo m88k-dg-dguxbcs${UNAME_RELEASE}
+	    fi
+	else
+	    echo i586-dg-dgux${UNAME_RELEASE}
+	fi
+ 	exit 0 ;;
+    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
+	echo m88k-dolphin-sysv3
+	exit 0 ;;
+    M88*:*:R3*:*)
+	# Delta 88k system running SVR3
+	echo m88k-motorola-sysv3
+	exit 0 ;;
+    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
+	echo m88k-tektronix-sysv3
+	exit 0 ;;
+    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
+	echo m68k-tektronix-bsd
+	exit 0 ;;
+    *:IRIX*:*:*)
+	echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
+	exit 0 ;;
+    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
+	echo romp-ibm-aix      # uname -m gives an 8 hex-code CPU id
+	exit 0 ;;              # Note that: echo "'`uname -s`'" gives 'AIX '
+    i*86:AIX:*:*)
+	echo i386-ibm-aix
+	exit 0 ;;
+    ia64:AIX:*:*)
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+	fi
+	echo ${UNAME_MACHINE}-ibm-aix${IBM_REV}
+	exit 0 ;;
+    *:AIX:2:3)
+	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
+		eval $set_cc_for_build
+		sed 's/^		//' << EOF >$dummy.c
+		#include <sys/systemcfg.h>
+
+		main()
+			{
+			if (!__power_pc())
+				exit(1);
+			puts("powerpc-ibm-aix3.2.5");
+			exit(0);
+			}
+EOF
+		$CC_FOR_BUILD -o $dummy $dummy.c && $dummy && rm -f $dummy.c $dummy && rmdir $tmpdir && exit 0
+		rm -f $dummy.c $dummy && rmdir $tmpdir
+		echo rs6000-ibm-aix3.2.5
+	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
+		echo rs6000-ibm-aix3.2.4
+	else
+		echo rs6000-ibm-aix3.2
+	fi
+	exit 0 ;;
+    *:AIX:*:[45])
+	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
+	if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then
+		IBM_ARCH=rs6000
+	else
+		IBM_ARCH=powerpc
+	fi
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+	fi
+	echo ${IBM_ARCH}-ibm-aix${IBM_REV}
+	exit 0 ;;
+    *:AIX:*:*)
+	echo rs6000-ibm-aix
+	exit 0 ;;
+    ibmrt:4.4BSD:*|romp-ibm:BSD:*)
+	echo romp-ibm-bsd4.4
+	exit 0 ;;
+    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
+	echo romp-ibm-bsd${UNAME_RELEASE}   # 4.3 with uname added to
+	exit 0 ;;                           # report: romp-ibm BSD 4.3
+    *:BOSX:*:*)
+	echo rs6000-bull-bosx
+	exit 0 ;;
+    DPX/2?00:B.O.S.:*:*)
+	echo m68k-bull-sysv3
+	exit 0 ;;
+    9000/[34]??:4.3bsd:1.*:*)
+	echo m68k-hp-bsd
+	exit 0 ;;
+    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
+	echo m68k-hp-bsd4.4
+	exit 0 ;;
+    9000/[34678]??:HP-UX:*:*)
+	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
+	case "${UNAME_MACHINE}" in
+	    9000/31? )            HP_ARCH=m68000 ;;
+	    9000/[34]?? )         HP_ARCH=m68k ;;
+	    9000/[678][0-9][0-9])
+		if [ -x /usr/bin/getconf ]; then
+		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
+                    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
+                    case "${sc_cpu_version}" in
+                      523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0
+                      528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1
+                      532)                      # CPU_PA_RISC2_0
+                        case "${sc_kernel_bits}" in
+                          32) HP_ARCH="hppa2.0n" ;;
+                          64) HP_ARCH="hppa2.0w" ;;
+			  '') HP_ARCH="hppa2.0" ;;   # HP-UX 10.20
+                        esac ;;
+                    esac
+		fi
+		if [ "${HP_ARCH}" = "" ]; then
+		    eval $set_cc_for_build
+		    sed 's/^              //' << EOF >$dummy.c
+
+              #define _HPUX_SOURCE
+              #include <stdlib.h>
+              #include <unistd.h>
+
+              int main ()
+              {
+              #if defined(_SC_KERNEL_BITS)
+                  long bits = sysconf(_SC_KERNEL_BITS);
+              #endif
+                  long cpu  = sysconf (_SC_CPU_VERSION);
+
+                  switch (cpu)
+              	{
+              	case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
+              	case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
+              	case CPU_PA_RISC2_0:
+              #if defined(_SC_KERNEL_BITS)
+              	    switch (bits)
+              		{
+              		case 64: puts ("hppa2.0w"); break;
+              		case 32: puts ("hppa2.0n"); break;
+              		default: puts ("hppa2.0"); break;
+              		} break;
+              #else  /* !defined(_SC_KERNEL_BITS) */
+              	    puts ("hppa2.0"); break;
+              #endif
+              	default: puts ("hppa1.0"); break;
+              	}
+                  exit (0);
+              }
+EOF
+		    (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
+		    if test -z "$HP_ARCH"; then HP_ARCH=hppa; fi
+		    rm -f $dummy.c $dummy && rmdir $tmpdir
+		fi ;;
+	esac
+	echo ${HP_ARCH}-hp-hpux${HPUX_REV}
+	exit 0 ;;
+    ia64:HP-UX:*:*)
+	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
+	echo ia64-hp-hpux${HPUX_REV}
+	exit 0 ;;
+    3050*:HI-UX:*:*)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#include <unistd.h>
+	int
+	main ()
+	{
+	  long cpu = sysconf (_SC_CPU_VERSION);
+	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
+	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
+	     results, however.  */
+	  if (CPU_IS_PA_RISC (cpu))
+	    {
+	      switch (cpu)
+		{
+		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
+		  default: puts ("hppa-hitachi-hiuxwe2"); break;
+		}
+	    }
+	  else if (CPU_IS_HP_MC68K (cpu))
+	    puts ("m68k-hitachi-hiuxwe2");
+	  else puts ("unknown-hitachi-hiuxwe2");
+	  exit (0);
+	}
+EOF
+	$CC_FOR_BUILD -o $dummy $dummy.c && $dummy && rm -f $dummy.c $dummy && rmdir $tmpdir && exit 0
+	rm -f $dummy.c $dummy && rmdir $tmpdir
+	echo unknown-hitachi-hiuxwe2
+	exit 0 ;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
+	echo hppa1.1-hp-bsd
+	exit 0 ;;
+    9000/8??:4.3bsd:*:*)
+	echo hppa1.0-hp-bsd
+	exit 0 ;;
+    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
+	echo hppa1.0-hp-mpeix
+	exit 0 ;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
+	echo hppa1.1-hp-osf
+	exit 0 ;;
+    hp8??:OSF1:*:*)
+	echo hppa1.0-hp-osf
+	exit 0 ;;
+    i*86:OSF1:*:*)
+	if [ -x /usr/sbin/sysversion ] ; then
+	    echo ${UNAME_MACHINE}-unknown-osf1mk
+	else
+	    echo ${UNAME_MACHINE}-unknown-osf1
+	fi
+	exit 0 ;;
+    parisc*:Lites*:*:*)
+	echo hppa1.1-hp-lites
+	exit 0 ;;
+    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
+	echo c1-convex-bsd
+        exit 0 ;;
+    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+        exit 0 ;;
+    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
+	echo c34-convex-bsd
+        exit 0 ;;
+    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
+	echo c38-convex-bsd
+        exit 0 ;;
+    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
+	echo c4-convex-bsd
+        exit 0 ;;
+    CRAY*Y-MP:*:*:*)
+	echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*[A-Z]90:*:*:*)
+	echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
+	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
+	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
+	      -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*TS:*:*:*)
+	echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*T3D:*:*:*)
+	echo alpha-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*T3E:*:*:*)
+	echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    CRAY*SV1:*:*:*)
+	echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit 0 ;;
+    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
+	FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+        FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
+        FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
+        echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+        exit 0 ;;
+    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
+	echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
+	exit 0 ;;
+    sparc*:BSD/OS:*:*)
+	echo sparc-unknown-bsdi${UNAME_RELEASE}
+	exit 0 ;;
+    *:BSD/OS:*:*)
+	echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE}
+	exit 0 ;;
+    *:FreeBSD:*:*)
+	# Determine whether the default compiler uses glibc.
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#include <features.h>
+	#if __GLIBC__ >= 2
+	LIBC=gnu
+	#else
+	LIBC=
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^LIBC=`
+	rm -f $dummy.c && rmdir $tmpdir
+	echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`${LIBC:+-$LIBC}
+	exit 0 ;;
+    i*:CYGWIN*:*)
+	echo ${UNAME_MACHINE}-pc-cygwin
+	exit 0 ;;
+    i*:MINGW*:*)
+	echo ${UNAME_MACHINE}-pc-mingw32
+	exit 0 ;;
+    i*:PW*:*)
+	echo ${UNAME_MACHINE}-pc-pw32
+	exit 0 ;;
+    x86:Interix*:3*)
+	echo i586-pc-interix3
+	exit 0 ;;
+    [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*)
+	echo i${UNAME_MACHINE}-pc-mks
+	exit 0 ;;
+    i*:Windows_NT*:* | Pentium*:Windows_NT*:*)
+	# How do we know it's Interix rather than the generic POSIX subsystem?
+	# It also conflicts with pre-2.0 versions of AT&T UWIN. Should we
+	# UNAME_MACHINE based on the output of uname instead of i386?
+	echo i586-pc-interix
+	exit 0 ;;
+    i*:UWIN*:*)
+	echo ${UNAME_MACHINE}-pc-uwin
+	exit 0 ;;
+    p*:CYGWIN*:*)
+	echo powerpcle-unknown-cygwin
+	exit 0 ;;
+    prep*:SunOS:5.*:*)
+	echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    *:GNU:*:*)
+	echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
+	exit 0 ;;
+    i*86:Minix:*:*)
+	echo ${UNAME_MACHINE}-pc-minix
+	exit 0 ;;
+    arm*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit 0 ;;
+    ia64:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit 0 ;;
+    m68*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit 0 ;;
+    mips:Linux:*:*)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#undef CPU
+	#undef mips
+	#undef mipsel
+	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+	CPU=mipsel
+	#else
+	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+	CPU=mips
+	#else
+	CPU=
+	#endif
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^CPU=`
+	rm -f $dummy.c && rmdir $tmpdir
+	test x"${CPU}" != x && echo "${CPU}-unknown-linux-gnu" && exit 0
+	;;
+    mips64:Linux:*:*)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#undef CPU
+	#undef mips64
+	#undef mips64el
+	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+	CPU=mips64el
+	#else
+	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+	CPU=mips64
+	#else
+	CPU=
+	#endif
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^CPU=`
+	rm -f $dummy.c && rmdir $tmpdir
+	test x"${CPU}" != x && echo "${CPU}-unknown-linux-gnu" && exit 0
+	;;
+    ppc:Linux:*:*)
+	echo powerpc-unknown-linux-gnu
+	exit 0 ;;
+    ppc64:Linux:*:*)
+	echo powerpc64-unknown-linux-gnu
+	exit 0 ;;
+    alpha:Linux:*:*)
+	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+	  EV5)   UNAME_MACHINE=alphaev5 ;;
+	  EV56)  UNAME_MACHINE=alphaev56 ;;
+	  PCA56) UNAME_MACHINE=alphapca56 ;;
+	  PCA57) UNAME_MACHINE=alphapca56 ;;
+	  EV6)   UNAME_MACHINE=alphaev6 ;;
+	  EV67)  UNAME_MACHINE=alphaev67 ;;
+	  EV68*) UNAME_MACHINE=alphaev68 ;;
+        esac
+	objdump --private-headers /bin/sh | grep ld.so.1 >/dev/null
+	if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi
+	echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC}
+	exit 0 ;;
+    parisc:Linux:*:* | hppa:Linux:*:*)
+	# Look for CPU level
+	case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
+	  PA7*) echo hppa1.1-unknown-linux-gnu ;;
+	  PA8*) echo hppa2.0-unknown-linux-gnu ;;
+	  *)    echo hppa-unknown-linux-gnu ;;
+	esac
+	exit 0 ;;
+    parisc64:Linux:*:* | hppa64:Linux:*:*)
+	echo hppa64-unknown-linux-gnu
+	exit 0 ;;
+    s390:Linux:*:* | s390x:Linux:*:*)
+	echo ${UNAME_MACHINE}-ibm-linux
+	exit 0 ;;
+    sh*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit 0 ;;
+    sparc:Linux:*:* | sparc64:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit 0 ;;
+    x86_64:Linux:*:*)
+	echo x86_64-unknown-linux-gnu
+	exit 0 ;;
+    i*86:Linux:*:*)
+	# The BFD linker knows what the default object file format is, so
+	# first see if it will tell us. cd to the root directory to prevent
+	# problems with other programs or directories called `ld' in the path.
+	# Set LC_ALL=C to ensure ld outputs messages in English.
+	ld_supported_targets=`cd /; LC_ALL=C ld --help 2>&1 \
+			 | sed -ne '/supported targets:/!d
+				    s/[ 	][ 	]*/ /g
+				    s/.*supported targets: *//
+				    s/ .*//
+				    p'`
+        case "$ld_supported_targets" in
+	  elf32-i386)
+		TENTATIVE="${UNAME_MACHINE}-pc-linux-gnu"
+		;;
+	  a.out-i386-linux)
+		echo "${UNAME_MACHINE}-pc-linux-gnuaout"
+		exit 0 ;;
+	  coff-i386)
+		echo "${UNAME_MACHINE}-pc-linux-gnucoff"
+		exit 0 ;;
+	  "")
+		# Either a pre-BFD a.out linker (linux-gnuoldld) or
+		# one that does not give us useful --help.
+		echo "${UNAME_MACHINE}-pc-linux-gnuoldld"
+		exit 0 ;;
+	esac
+	# Determine whether the default compiler is a.out or elf
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#include <features.h>
+	#ifdef __ELF__
+	# ifdef __GLIBC__
+	#  if __GLIBC__ >= 2
+	LIBC=gnu
+	#  else
+	LIBC=gnulibc1
+	#  endif
+	# else
+	LIBC=gnulibc1
+	# endif
+	#else
+	#ifdef __INTEL_COMPILER
+	LIBC=gnu
+	#else
+	LIBC=gnuaout
+	#endif
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^LIBC=`
+	rm -f $dummy.c && rmdir $tmpdir
+	test x"${LIBC}" != x && echo "${UNAME_MACHINE}-pc-linux-${LIBC}" && exit 0
+	test x"${TENTATIVE}" != x && echo "${TENTATIVE}" && exit 0
+	;;
+    i*86:DYNIX/ptx:4*:*)
+	# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
+	# earlier versions are messed up and put the nodename in both
+	# sysname and nodename.
+	echo i386-sequent-sysv4
+	exit 0 ;;
+    i*86:UNIX_SV:4.2MP:2.*)
+        # Unixware is an offshoot of SVR4, but it has its own version
+        # number series starting with 2...
+        # I am not positive that other SVR4 systems won't match this,
+	# I just have to hope.  -- rms.
+        # Use sysv4.2uw... so that sysv4* matches it.
+	echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
+	exit 0 ;;
+    i*86:OS/2:*:*)
+	# If we were able to find `uname', then EMX Unix compatibility
+	# is probably installed.
+	echo ${UNAME_MACHINE}-pc-os2-emx
+	exit 0 ;;
+    i*86:XTS-300:*:STOP)
+	echo ${UNAME_MACHINE}-unknown-stop
+	exit 0 ;;
+    i*86:atheos:*:*)
+	echo ${UNAME_MACHINE}-unknown-atheos
+	exit 0 ;;
+    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.0*:*)
+	echo i386-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    i*86:*DOS:*:*)
+	echo ${UNAME_MACHINE}-pc-msdosdjgpp
+	exit 0 ;;
+    i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*)
+	UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'`
+	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
+		echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL}
+	else
+		echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL}
+	fi
+	exit 0 ;;
+    i*86:*:5:[78]*)
+	case `/bin/uname -X | grep "^Machine"` in
+	    *486*)	     UNAME_MACHINE=i486 ;;
+	    *Pentium)	     UNAME_MACHINE=i586 ;;
+	    *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
+	esac
+	echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
+	exit 0 ;;
+    i*86:*:3.2:*)
+	if test -f /usr/options/cb.name; then
+		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+		echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
+	elif /bin/uname -X 2>/dev/null >/dev/null ; then
+		UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
+		(/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
+		(/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
+			&& UNAME_MACHINE=i586
+		(/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		(/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
+	else
+		echo ${UNAME_MACHINE}-pc-sysv32
+	fi
+	exit 0 ;;
+    pc:*:*:*)
+	# Left here for compatibility:
+        # uname -m prints for DJGPP always 'pc', but it prints nothing about
+        # the processor, so we play safe by assuming i386.
+	echo i386-pc-msdosdjgpp
+        exit 0 ;;
+    Intel:Mach:3*:*)
+	echo i386-pc-mach3
+	exit 0 ;;
+    paragon:*:*:*)
+	echo i860-intel-osf1
+	exit 0 ;;
+    i860:*:4.*:*) # i860-SVR4
+	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
+	  echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
+	else # Add other i860-SVR4 vendors below as they are discovered.
+	  echo i860-unknown-sysv${UNAME_RELEASE}  # Unknown i860-SVR4
+	fi
+	exit 0 ;;
+    mini*:CTIX:SYS*5:*)
+	# "miniframe"
+	echo m68010-convergent-sysv
+	exit 0 ;;
+    mc68k:UNIX:SYSTEM5:3.51m)
+	echo m68k-convergent-sysv
+	exit 0 ;;
+    M680?0:D-NIX:5.3:*)
+	echo m68k-diab-dnix
+	exit 0 ;;
+    M68*:*:R3V[567]*:*)
+	test -r /sysV68 && echo 'm68k-motorola-sysv' && exit 0 ;;
+    3[34]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0)
+	OS_REL=''
+	test -r /etc/.relid \
+	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && echo i486-ncr-sysv4.3${OS_REL} && exit 0
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	  && echo i586-ncr-sysv4.3${OS_REL} && exit 0 ;;
+    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
+        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+          && echo i486-ncr-sysv4 && exit 0 ;;
+    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
+	echo m68k-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    mc68030:UNIX_System_V:4.*:*)
+	echo m68k-atari-sysv4
+	exit 0 ;;
+    TSUNAMI:LynxOS:2.*:*)
+	echo sparc-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    rs6000:LynxOS:2.*:*)
+	echo rs6000-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.0*:*)
+	echo powerpc-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    SM[BE]S:UNIX_SV:*:*)
+	echo mips-dde-sysv${UNAME_RELEASE}
+	exit 0 ;;
+    RM*:ReliantUNIX-*:*:*)
+	echo mips-sni-sysv4
+	exit 0 ;;
+    RM*:SINIX-*:*:*)
+	echo mips-sni-sysv4
+	exit 0 ;;
+    *:SINIX-*:*:*)
+	if uname -p 2>/dev/null >/dev/null ; then
+		UNAME_MACHINE=`(uname -p) 2>/dev/null`
+		echo ${UNAME_MACHINE}-sni-sysv4
+	else
+		echo ns32k-sni-sysv
+	fi
+	exit 0 ;;
+    PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+                      # says <Richard.M.Bartel@ccMail.Census.GOV>
+        echo i586-unisys-sysv4
+        exit 0 ;;
+    *:UNIX_System_V:4*:FTX*)
+	# From Gerald Hewes <hewes@openmarket.com>.
+	# How about differentiating between stratus architectures? -djm
+	echo hppa1.1-stratus-sysv4
+	exit 0 ;;
+    *:*:*:FTX*)
+	# From seanf@swdc.stratus.com.
+	echo i860-stratus-sysv4
+	exit 0 ;;
+    *:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	echo hppa1.1-stratus-vos
+	exit 0 ;;
+    mc68*:A/UX:*:*)
+	echo m68k-apple-aux${UNAME_RELEASE}
+	exit 0 ;;
+    news*:NEWS-OS:6*:*)
+	echo mips-sony-newsos6
+	exit 0 ;;
+    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
+	if [ -d /usr/nec ]; then
+	        echo mips-nec-sysv${UNAME_RELEASE}
+	else
+	        echo mips-unknown-sysv${UNAME_RELEASE}
+	fi
+        exit 0 ;;
+    BeBox:BeOS:*:*)	# BeOS running on hardware made by Be, PPC only.
+	echo powerpc-be-beos
+	exit 0 ;;
+    BeMac:BeOS:*:*)	# BeOS running on Mac or Mac clone, PPC only.
+	echo powerpc-apple-beos
+	exit 0 ;;
+    BePC:BeOS:*:*)	# BeOS running on Intel PC compatible.
+	echo i586-pc-beos
+	exit 0 ;;
+    SX-4:SUPER-UX:*:*)
+	echo sx4-nec-superux${UNAME_RELEASE}
+	exit 0 ;;
+    SX-5:SUPER-UX:*:*)
+	echo sx5-nec-superux${UNAME_RELEASE}
+	exit 0 ;;
+    SX-6:SUPER-UX:*:*)
+	echo sx6-nec-superux${UNAME_RELEASE}
+	exit 0 ;;
+    Power*:Rhapsody:*:*)
+	echo powerpc-apple-rhapsody${UNAME_RELEASE}
+	exit 0 ;;
+    *:Rhapsody:*:*)
+	echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
+	exit 0 ;;
+    *:Darwin:*:*)
+	echo `uname -p`-apple-darwin${UNAME_RELEASE}
+	exit 0 ;;
+    *:procnto*:*:* | *:QNX:[0123456789]*:*)
+	UNAME_PROCESSOR=`uname -p`
+	if test "$UNAME_PROCESSOR" = "x86"; then
+		UNAME_PROCESSOR=i386
+		UNAME_MACHINE=pc
+	fi
+	echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE}
+	exit 0 ;;
+    *:QNX:*:4*)
+	echo i386-pc-qnx
+	exit 0 ;;
+    NSR-[DGKLNPTVW]:NONSTOP_KERNEL:*:*)
+	echo nsr-tandem-nsk${UNAME_RELEASE}
+	exit 0 ;;
+    *:NonStop-UX:*:*)
+	echo mips-compaq-nonstopux
+	exit 0 ;;
+    BS2000:POSIX*:*:*)
+	echo bs2000-siemens-sysv
+	exit 0 ;;
+    DS/*:UNIX_System_V:*:*)
+	echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE}
+	exit 0 ;;
+    *:Plan9:*:*)
+	# "uname -m" is not consistent, so use $cputype instead. 386
+	# is converted to i386 for consistency with other x86
+	# operating systems.
+	if test "$cputype" = "386"; then
+	    UNAME_MACHINE=i386
+	else
+	    UNAME_MACHINE="$cputype"
+	fi
+	echo ${UNAME_MACHINE}-unknown-plan9
+	exit 0 ;;
+    *:TOPS-10:*:*)
+	echo pdp10-unknown-tops10
+	exit 0 ;;
+    *:TENEX:*:*)
+	echo pdp10-unknown-tenex
+	exit 0 ;;
+    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
+	echo pdp10-dec-tops20
+	exit 0 ;;
+    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
+	echo pdp10-xkl-tops20
+	exit 0 ;;
+    *:TOPS-20:*:*)
+	echo pdp10-unknown-tops20
+	exit 0 ;;
+    *:ITS:*:*)
+	echo pdp10-unknown-its
+	exit 0 ;;
+esac
+
+#echo '(No uname command or uname output not recognized.)' 1>&2
+#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2
+
+eval $set_cc_for_build
+cat >$dummy.c <<EOF
+#ifdef _SEQUENT_
+# include <sys/types.h>
+# include <sys/utsname.h>
+#endif
+main ()
+{
+#if defined (sony)
+#if defined (MIPSEB)
+  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
+     I don't know....  */
+  printf ("mips-sony-bsd\n"); exit (0);
+#else
+#include <sys/param.h>
+  printf ("m68k-sony-newsos%s\n",
+#ifdef NEWSOS4
+          "4"
+#else
+	  ""
+#endif
+         ); exit (0);
+#endif
+#endif
+
+#if defined (__arm) && defined (__acorn) && defined (__unix)
+  printf ("arm-acorn-riscix"); exit (0);
+#endif
+
+#if defined (hp300) && !defined (hpux)
+  printf ("m68k-hp-bsd\n"); exit (0);
+#endif
+
+#if defined (NeXT)
+#if !defined (__ARCHITECTURE__)
+#define __ARCHITECTURE__ "m68k"
+#endif
+  int version;
+  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  if (version < 4)
+    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
+  else
+    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
+  exit (0);
+#endif
+
+#if defined (MULTIMAX) || defined (n16)
+#if defined (UMAXV)
+  printf ("ns32k-encore-sysv\n"); exit (0);
+#else
+#if defined (CMU)
+  printf ("ns32k-encore-mach\n"); exit (0);
+#else
+  printf ("ns32k-encore-bsd\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (__386BSD__)
+  printf ("i386-pc-bsd\n"); exit (0);
+#endif
+
+#if defined (sequent)
+#if defined (i386)
+  printf ("i386-sequent-dynix\n"); exit (0);
+#endif
+#if defined (ns32000)
+  printf ("ns32k-sequent-dynix\n"); exit (0);
+#endif
+#endif
+
+#if defined (_SEQUENT_)
+    struct utsname un;
+
+    uname(&un);
+
+    if (strncmp(un.version, "V2", 2) == 0) {
+	printf ("i386-sequent-ptx2\n"); exit (0);
+    }
+    if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
+	printf ("i386-sequent-ptx1\n"); exit (0);
+    }
+    printf ("i386-sequent-ptx\n"); exit (0);
+
+#endif
+
+#if defined (vax)
+# if !defined (ultrix)
+#  include <sys/param.h>
+#  if defined (BSD)
+#   if BSD == 43
+      printf ("vax-dec-bsd4.3\n"); exit (0);
+#   else
+#    if BSD == 199006
+      printf ("vax-dec-bsd4.3reno\n"); exit (0);
+#    else
+      printf ("vax-dec-bsd\n"); exit (0);
+#    endif
+#   endif
+#  else
+    printf ("vax-dec-bsd\n"); exit (0);
+#  endif
+# else
+    printf ("vax-dec-ultrix\n"); exit (0);
+# endif
+#endif
+
+#if defined (alliant) && defined (i860)
+  printf ("i860-alliant-bsd\n"); exit (0);
+#endif
+
+  exit (1);
+}
+EOF
+
+$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && $dummy && rm -f $dummy.c $dummy && rmdir $tmpdir && exit 0
+rm -f $dummy.c $dummy && rmdir $tmpdir
+
+# Apollos put the system type in the environment.
+
+test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit 0; }
+
+# Convex versions that predate uname can use getsysinfo(1)
+
+if [ -x /usr/convex/getsysinfo ]
+then
+    case `getsysinfo -f cpu_type` in
+    c1*)
+	echo c1-convex-bsd
+	exit 0 ;;
+    c2*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+	exit 0 ;;
+    c34*)
+	echo c34-convex-bsd
+	exit 0 ;;
+    c38*)
+	echo c38-convex-bsd
+	exit 0 ;;
+    c4*)
+	echo c4-convex-bsd
+	exit 0 ;;
+    esac
+fi
+
+cat >&2 <<EOF
+$0: unable to guess system type
+
+This script, last modified $timestamp, has failed to recognize
+the operating system you are using. It is advised that you
+download the most up to date version of the config scripts from
+
+    ftp://ftp.gnu.org/pub/gnu/config/
+
+If the version you run ($0) is already up to date, please
+send the following data and any information you think might be
+pertinent to <config-patches@gnu.org> in order to provide the needed
+information to handle your system.
+
+config.guess timestamp = $timestamp
+
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
+
+hostinfo               = `(hostinfo) 2>/dev/null`
+/bin/universe          = `(/bin/universe) 2>/dev/null`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
+/bin/arch              = `(/bin/arch) 2>/dev/null`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
+
+UNAME_MACHINE = ${UNAME_MACHINE}
+UNAME_RELEASE = ${UNAME_RELEASE}
+UNAME_SYSTEM  = ${UNAME_SYSTEM}
+UNAME_VERSION = ${UNAME_VERSION}
+EOF
+
+exit 1
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/external-libs/pcre/config.h b/external-libs/pcre/config.h
new file mode 100644
index 00000000..c8c39008
--- /dev/null
+++ b/external-libs/pcre/config.h
@@ -0,0 +1,107 @@
+
+/* On Unix systems config.in is converted by configure into config.h. PCRE is
+written in Standard C, but there are a few non-standard things it can cope
+with, allowing it to run on SunOS4 and other "close to standard" systems.
+
+On a non-Unix system you should just copy this file into config.h, and set up
+the macros the way you need them. You should normally change the definitions of
+HAVE_STRERROR and HAVE_MEMMOVE to 1. Unfortunately, because of the way autoconf
+works, these cannot be made the defaults. If your system has bcopy() and not
+memmove(), change the definition of HAVE_BCOPY instead of HAVE_MEMMOVE. If your
+system has neither bcopy() nor memmove(), leave them both as 0; an emulation
+function will be used. */
+
+/* If you are compiling for a system that uses EBCDIC instead of ASCII
+character codes, define this macro as 1. On systems that can use "configure",
+this can be done via --enable-ebcdic. */
+
+#ifndef EBCDIC
+#define EBCDIC 0
+#endif
+
+/* If you are compiling for a system that needs some magic to be inserted
+before the definition of an exported function, define this macro to contain the
+relevant magic. It apears at the start of every exported function. */
+
+#define EXPORT
+
+/* Define to empty if the "const" keyword does not work. */
+
+#undef const
+
+/* Define to "unsigned" if <stddef.h> doesn't define size_t. */
+
+#undef size_t
+
+/* The following two definitions are mainly for the benefit of SunOS4, which
+doesn't have the strerror() or memmove() functions that should be present in
+all Standard C libraries. The macros HAVE_STRERROR and HAVE_MEMMOVE should
+normally be defined with the value 1 for other systems, but unfortunately we
+can't make this the default because "configure" files generated by autoconf
+will only change 0 to 1; they won't change 1 to 0 if the functions are not
+found. */
+
+#define HAVE_STRERROR 1
+#define HAVE_MEMMOVE  1
+
+/* There are some non-Unix systems that don't even have bcopy(). If this macro
+is false, an emulation is used. If HAVE_MEMMOVE is set to 1, the value of
+HAVE_BCOPY is not relevant. */
+
+#define HAVE_BCOPY    0
+
+/* The value of NEWLINE determines the newline character. The default is to
+leave it up to the compiler, but some sites want to force a particular value.
+On Unix systems, "configure" can be used to override this default. */
+
+#ifndef NEWLINE
+#define NEWLINE '\n'
+#endif
+
+/* The value of LINK_SIZE determines the number of bytes used to store
+links as offsets within the compiled regex. The default is 2, which allows for
+compiled patterns up to 64K long. This covers the vast majority of cases.
+However, PCRE can also be compiled to use 3 or 4 bytes instead. This allows for
+longer patterns in extreme cases. On Unix systems, "configure" can be used to
+override this default. */
+
+#ifndef LINK_SIZE
+#define LINK_SIZE   2
+#endif
+
+/* The value of MATCH_LIMIT determines the default number of times the match()
+function can be called during a single execution of pcre_exec(). (There is a
+runtime method of setting a different limit.) The limit exists in order to
+catch runaway regular expressions that take for ever to determine that they do
+not match. The default is set very large so that it does not accidentally catch
+legitimate cases. On Unix systems, "configure" can be used to override this
+default default. */
+
+#ifndef MATCH_LIMIT
+#define MATCH_LIMIT 10000000
+#endif
+
+/* When calling PCRE via the POSIX interface, additional working storage is
+required for holding the pointers to capturing substrings because PCRE requires
+three integers per substring, whereas the POSIX interface provides only two. If
+the number of expected substrings is small, the wrapper function uses space on
+the stack, because this is faster than using malloc() for each call. The
+threshold above which the stack is no longer use is defined by POSIX_MALLOC_
+THRESHOLD. On Unix systems, "configure" can be used to override this default.
+*/
+
+#ifndef POSIX_MALLOC_THRESHOLD
+#define POSIX_MALLOC_THRESHOLD 10
+#endif
+
+/* PCRE uses recursive function calls to handle backtracking while matching.
+This can sometimes be a problem on systems that have stacks of limited size.
+Define NO_RECURSE to get a version that doesn't use recursion in the match()
+function; instead it creates its own stack by steam using pcre_recurse_malloc
+to get memory. For more detail, see comments and other stuff just above the
+match() function. On Unix systems, "configure" can be used to set this in the
+Makefile (use --disable-recursion). */
+
+/* #define NO_RECURSE */
+
+/* End */
diff --git a/external-libs/pcre/config.in b/external-libs/pcre/config.in
new file mode 100644
index 00000000..cb926a47
--- /dev/null
+++ b/external-libs/pcre/config.in
@@ -0,0 +1,107 @@
+
+/* On Unix systems config.in is converted by configure into config.h. PCRE is
+written in Standard C, but there are a few non-standard things it can cope
+with, allowing it to run on SunOS4 and other "close to standard" systems.
+
+On a non-Unix system you should just copy this file into config.h, and set up
+the macros the way you need them. You should normally change the definitions of
+HAVE_STRERROR and HAVE_MEMMOVE to 1. Unfortunately, because of the way autoconf
+works, these cannot be made the defaults. If your system has bcopy() and not
+memmove(), change the definition of HAVE_BCOPY instead of HAVE_MEMMOVE. If your
+system has neither bcopy() nor memmove(), leave them both as 0; an emulation
+function will be used. */
+
+/* If you are compiling for a system that uses EBCDIC instead of ASCII
+character codes, define this macro as 1. On systems that can use "configure",
+this can be done via --enable-ebcdic. */
+
+#ifndef EBCDIC
+#define EBCDIC 0
+#endif
+
+/* If you are compiling for a system that needs some magic to be inserted
+before the definition of an exported function, define this macro to contain the
+relevant magic. It apears at the start of every exported function. */
+
+#define EXPORT
+
+/* Define to empty if the "const" keyword does not work. */
+
+#undef const
+
+/* Define to "unsigned" if <stddef.h> doesn't define size_t. */
+
+#undef size_t
+
+/* The following two definitions are mainly for the benefit of SunOS4, which
+doesn't have the strerror() or memmove() functions that should be present in
+all Standard C libraries. The macros HAVE_STRERROR and HAVE_MEMMOVE should
+normally be defined with the value 1 for other systems, but unfortunately we
+can't make this the default because "configure" files generated by autoconf
+will only change 0 to 1; they won't change 1 to 0 if the functions are not
+found. */
+
+#define HAVE_STRERROR 0
+#define HAVE_MEMMOVE  0
+
+/* There are some non-Unix systems that don't even have bcopy(). If this macro
+is false, an emulation is used. If HAVE_MEMMOVE is set to 1, the value of
+HAVE_BCOPY is not relevant. */
+
+#define HAVE_BCOPY    0
+
+/* The value of NEWLINE determines the newline character. The default is to
+leave it up to the compiler, but some sites want to force a particular value.
+On Unix systems, "configure" can be used to override this default. */
+
+#ifndef NEWLINE
+#define NEWLINE '\n'
+#endif
+
+/* The value of LINK_SIZE determines the number of bytes used to store
+links as offsets within the compiled regex. The default is 2, which allows for
+compiled patterns up to 64K long. This covers the vast majority of cases.
+However, PCRE can also be compiled to use 3 or 4 bytes instead. This allows for
+longer patterns in extreme cases. On Unix systems, "configure" can be used to
+override this default. */
+
+#ifndef LINK_SIZE
+#define LINK_SIZE   2
+#endif
+
+/* The value of MATCH_LIMIT determines the default number of times the match()
+function can be called during a single execution of pcre_exec(). (There is a
+runtime method of setting a different limit.) The limit exists in order to
+catch runaway regular expressions that take for ever to determine that they do
+not match. The default is set very large so that it does not accidentally catch
+legitimate cases. On Unix systems, "configure" can be used to override this
+default default. */
+
+#ifndef MATCH_LIMIT
+#define MATCH_LIMIT 10000000
+#endif
+
+/* When calling PCRE via the POSIX interface, additional working storage is
+required for holding the pointers to capturing substrings because PCRE requires
+three integers per substring, whereas the POSIX interface provides only two. If
+the number of expected substrings is small, the wrapper function uses space on
+the stack, because this is faster than using malloc() for each call. The
+threshold above which the stack is no longer use is defined by POSIX_MALLOC_
+THRESHOLD. On Unix systems, "configure" can be used to override this default.
+*/
+
+#ifndef POSIX_MALLOC_THRESHOLD
+#define POSIX_MALLOC_THRESHOLD 10
+#endif
+
+/* PCRE uses recursive function calls to handle backtracking while matching.
+This can sometimes be a problem on systems that have stacks of limited size.
+Define NO_RECURSE to get a version that doesn't use recursion in the match()
+function; instead it creates its own stack by steam using pcre_recurse_malloc
+to get memory. For more detail, see comments and other stuff just above the
+match() function. On Unix systems, "configure" can be used to set this in the
+Makefile (use --disable-recursion). */
+
+/* #define NO_RECURSE */
+
+/* End */
diff --git a/external-libs/pcre/config.sub b/external-libs/pcre/config.sub
new file mode 100644
index 00000000..f0675aa6
--- /dev/null
+++ b/external-libs/pcre/config.sub
@@ -0,0 +1,1469 @@
+#! /bin/sh
+# Configuration validation subroutine script.
+#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+#   2000, 2001, 2002 Free Software Foundation, Inc.
+
+timestamp='2002-11-30'
+
+# This file is (in principle) common to ALL GNU software.
+# The presence of a machine in this file suggests that SOME GNU software
+# can handle that machine.  It does not imply ALL GNU software can.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Please send patches to <config-patches@gnu.org>.  Submit a context
+# diff and a properly formatted ChangeLog entry.
+#
+# Configuration subroutine to validate and canonicalize a configuration type.
+# Supply the specified configuration type as an argument.
+# If it is invalid, we print an error message on stderr and exit with code 1.
+# Otherwise, we print the canonical config type on stdout and succeed.
+
+# This file is supposed to be the same for all GNU packages
+# and recognize all the CPU types, system types and aliases
+# that are meaningful with *any* GNU software.
+# Each package is responsible for reporting which valid configurations
+# it does not support.  The user should be able to distinguish
+# a failure to support a valid configuration from a meaningless
+# configuration.
+
+# The goal of this file is to map all the various variations of a given
+# machine specification into a single specification in the form:
+#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or in some cases, the newer four-part form:
+#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# It is wrong to echo any other type of specification.
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION] CPU-MFR-OPSYS
+       $0 [OPTION] ALIAS
+
+Canonicalize a configuration name.
+
+Operation modes:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.sub ($timestamp)
+
+Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+Free Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit 0 ;;
+    --version | -v )
+       echo "$version" ; exit 0 ;;
+    --help | --h* | -h )
+       echo "$usage"; exit 0 ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help"
+       exit 1 ;;
+
+    *local*)
+       # First pass through any local machine types.
+       echo $1
+       exit 0;;
+
+    * )
+       break ;;
+  esac
+done
+
+case $# in
+ 0) echo "$me: missing argument$help" >&2
+    exit 1;;
+ 1) ;;
+ *) echo "$me: too many arguments$help" >&2
+    exit 1;;
+esac
+
+# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
+# Here we must recognize all the valid KERNEL-OS combinations.
+maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
+case $maybe_os in
+  nto-qnx* | linux-gnu* | freebsd*-gnu* | netbsd*-gnu* | storm-chaos* | os2-emx* | rtmk-nova*)
+    os=-$maybe_os
+    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
+    ;;
+  *)
+    basic_machine=`echo $1 | sed 's/-[^-]*$//'`
+    if [ $basic_machine != $1 ]
+    then os=`echo $1 | sed 's/.*-/-/'`
+    else os=; fi
+    ;;
+esac
+
+### Let's recognize common machines as not being operating systems so
+### that things like config.sub decstation-3100 work.  We also
+### recognize some manufacturers as not being operating systems, so we
+### can provide default operating systems below.
+case $os in
+	-sun*os*)
+		# Prevent following clause from handling this invalid input.
+		;;
+	-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
+	-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
+	-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
+	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
+	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
+	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
+	-apple | -axis)
+		os=
+		basic_machine=$1
+		;;
+	-sim | -cisco | -oki | -wec | -winbond)
+		os=
+		basic_machine=$1
+		;;
+	-scout)
+		;;
+	-wrs)
+		os=-vxworks
+		basic_machine=$1
+		;;
+	-chorusos*)
+		os=-chorusos
+		basic_machine=$1
+		;;
+ 	-chorusrdb)
+ 		os=-chorusrdb
+		basic_machine=$1
+ 		;;
+	-hiux*)
+		os=-hiuxwe2
+		;;
+	-sco5)
+		os=-sco3.2v5
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco4)
+		os=-sco3.2v4
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2.[4-9]*)
+		os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2v[4-9]*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco*)
+		os=-sco3.2v2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-udk*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-isc)
+		os=-isc2.2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-clix*)
+		basic_machine=clipper-intergraph
+		;;
+	-isc*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-lynx*)
+		os=-lynxos
+		;;
+	-ptx*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
+		;;
+	-windowsnt*)
+		os=`echo $os | sed -e 's/windowsnt/winnt/'`
+		;;
+	-psos*)
+		os=-psos
+		;;
+	-mint | -mint[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+esac
+
+# Decode aliases for certain CPU-COMPANY combinations.
+case $basic_machine in
+	# Recognize the basic CPU types without company name.
+	# Some are omitted here because they have special meanings below.
+	1750a | 580 \
+	| a29k \
+	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
+	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
+	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr \
+	| clipper \
+	| d10v | d30v | dlx | dsp16xx \
+	| fr30 | frv \
+	| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
+	| i370 | i860 | i960 | ia64 \
+	| ip2k \
+	| m32r | m68000 | m68k | m88k | mcore \
+	| mips | mipsbe | mipseb | mipsel | mipsle \
+	| mips16 \
+	| mips64 | mips64el \
+	| mips64vr | mips64vrel \
+	| mips64orion | mips64orionel \
+	| mips64vr4100 | mips64vr4100el \
+	| mips64vr4300 | mips64vr4300el \
+	| mips64vr5000 | mips64vr5000el \
+	| mipsisa32 | mipsisa32el \
+	| mipsisa64 | mipsisa64el \
+	| mipsisa64sb1 | mipsisa64sb1el \
+	| mipsisa64sr71k | mipsisa64sr71kel \
+	| mipstx39 | mipstx39el \
+	| mn10200 | mn10300 \
+	| ns16k | ns32k \
+	| openrisc | or32 \
+	| pdp10 | pdp11 | pj | pjl \
+	| powerpc | powerpc64 | powerpc64le | powerpcle | ppcbe \
+	| pyramid \
+	| sh | sh[1234] | sh3e | sh[34]eb | shbe | shle | sh[1234]le | sh3ele \
+	| sh64 | sh64le \
+	| sparc | sparc64 | sparc86x | sparclet | sparclite | sparcv9 | sparcv9b \
+	| strongarm \
+	| tahoe | thumb | tic80 | tron \
+	| v850 | v850e \
+	| we32k \
+	| x86 | xscale | xstormy16 | xtensa \
+	| z8k)
+		basic_machine=$basic_machine-unknown
+		;;
+	m6811 | m68hc11 | m6812 | m68hc12)
+		# Motorola 68HC11/12.
+		basic_machine=$basic_machine-unknown
+		os=-none
+		;;
+	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
+		;;
+
+	# We use `pc' rather than `unknown'
+	# because (1) that's what they normally are, and
+	# (2) the word "unknown" tends to confuse beginning users.
+	i*86 | x86_64)
+	  basic_machine=$basic_machine-pc
+	  ;;
+	# Object if more than one company name word.
+	*-*-*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+	# Recognize the basic CPU types with company name.
+	580-* \
+	| a29k-* \
+	| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
+	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
+	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
+	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
+	| avr-* \
+	| bs2000-* \
+	| c[123]* | c30-* | [cjt]90-* | c4x-* | c54x-* \
+	| clipper-* | cydra-* \
+	| d10v-* | d30v-* | dlx-* \
+	| elxsi-* \
+	| f30[01]-* | f700-* | fr30-* | frv-* | fx80-* \
+	| h8300-* | h8500-* \
+	| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
+	| i*86-* | i860-* | i960-* | ia64-* \
+	| ip2k-* \
+	| m32r-* \
+	| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
+	| m88110-* | m88k-* | mcore-* \
+	| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
+	| mips16-* \
+	| mips64-* | mips64el-* \
+	| mips64vr-* | mips64vrel-* \
+	| mips64orion-* | mips64orionel-* \
+	| mips64vr4100-* | mips64vr4100el-* \
+	| mips64vr4300-* | mips64vr4300el-* \
+	| mips64vr5000-* | mips64vr5000el-* \
+	| mipsisa32-* | mipsisa32el-* \
+	| mipsisa64-* | mipsisa64el-* \
+	| mipsisa64sb1-* | mipsisa64sb1el-* \
+	| mipsisa64sr71k-* | mipsisa64sr71kel-* \
+	| mipstx39 | mipstx39el \
+	| none-* | np1-* | ns16k-* | ns32k-* \
+	| orion-* \
+	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
+	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* | ppcbe-* \
+	| pyramid-* \
+	| romp-* | rs6000-* \
+	| sh-* | sh[1234]-* | sh3e-* | sh[34]eb-* | shbe-* \
+	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
+	| sparc-* | sparc64-* | sparc86x-* | sparclet-* | sparclite-* \
+	| sparcv9-* | sparcv9b-* | strongarm-* | sv1-* | sx?-* \
+	| tahoe-* | thumb-* | tic30-* | tic4x-* | tic54x-* | tic80-* | tron-* \
+	| v850-* | v850e-* | vax-* \
+	| we32k-* \
+	| x86-* | x86_64-* | xps100-* | xscale-* | xstormy16-* \
+	| xtensa-* \
+	| ymp-* \
+	| z8k-*)
+		;;
+	# Recognize the various machine names and aliases which stand
+	# for a CPU type and a company and sometimes even an OS.
+	386bsd)
+		basic_machine=i386-unknown
+		os=-bsd
+		;;
+	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
+		basic_machine=m68000-att
+		;;
+	3b*)
+		basic_machine=we32k-att
+		;;
+	a29khif)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	adobe68k)
+		basic_machine=m68010-adobe
+		os=-scout
+		;;
+	alliant | fx80)
+		basic_machine=fx80-alliant
+		;;
+	altos | altos3068)
+		basic_machine=m68k-altos
+		;;
+	am29k)
+		basic_machine=a29k-none
+		os=-bsd
+		;;
+	amdahl)
+		basic_machine=580-amdahl
+		os=-sysv
+		;;
+	amiga | amiga-*)
+		basic_machine=m68k-unknown
+		;;
+	amigaos | amigados)
+		basic_machine=m68k-unknown
+		os=-amigaos
+		;;
+	amigaunix | amix)
+		basic_machine=m68k-unknown
+		os=-sysv4
+		;;
+	apollo68)
+		basic_machine=m68k-apollo
+		os=-sysv
+		;;
+	apollo68bsd)
+		basic_machine=m68k-apollo
+		os=-bsd
+		;;
+	aux)
+		basic_machine=m68k-apple
+		os=-aux
+		;;
+	balance)
+		basic_machine=ns32k-sequent
+		os=-dynix
+		;;
+	c90)
+		basic_machine=c90-cray
+		os=-unicos
+		;;
+	convex-c1)
+		basic_machine=c1-convex
+		os=-bsd
+		;;
+	convex-c2)
+		basic_machine=c2-convex
+		os=-bsd
+		;;
+	convex-c32)
+		basic_machine=c32-convex
+		os=-bsd
+		;;
+	convex-c34)
+		basic_machine=c34-convex
+		os=-bsd
+		;;
+	convex-c38)
+		basic_machine=c38-convex
+		os=-bsd
+		;;
+	cray | j90)
+		basic_machine=j90-cray
+		os=-unicos
+		;;
+	crds | unos)
+		basic_machine=m68k-crds
+		;;
+	cris | cris-* | etrax*)
+		basic_machine=cris-axis
+		;;
+	da30 | da30-*)
+		basic_machine=m68k-da30
+		;;
+	decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
+		basic_machine=mips-dec
+		;;
+	decsystem10* | dec10*)
+		basic_machine=pdp10-dec
+		os=-tops10
+		;;
+	decsystem20* | dec20*)
+		basic_machine=pdp10-dec
+		os=-tops20
+		;;
+	delta | 3300 | motorola-3300 | motorola-delta \
+	      | 3300-motorola | delta-motorola)
+		basic_machine=m68k-motorola
+		;;
+	delta88)
+		basic_machine=m88k-motorola
+		os=-sysv3
+		;;
+	dpx20 | dpx20-*)
+		basic_machine=rs6000-bull
+		os=-bosx
+		;;
+	dpx2* | dpx2*-bull)
+		basic_machine=m68k-bull
+		os=-sysv3
+		;;
+	ebmon29k)
+		basic_machine=a29k-amd
+		os=-ebmon
+		;;
+	elxsi)
+		basic_machine=elxsi-elxsi
+		os=-bsd
+		;;
+	encore | umax | mmax)
+		basic_machine=ns32k-encore
+		;;
+	es1800 | OSE68k | ose68k | ose | OSE)
+		basic_machine=m68k-ericsson
+		os=-ose
+		;;
+	fx2800)
+		basic_machine=i860-alliant
+		;;
+	genix)
+		basic_machine=ns32k-ns
+		;;
+	gmicro)
+		basic_machine=tron-gmicro
+		os=-sysv
+		;;
+	go32)
+		basic_machine=i386-pc
+		os=-go32
+		;;
+	h3050r* | hiux*)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	h8300hms)
+		basic_machine=h8300-hitachi
+		os=-hms
+		;;
+	h8300xray)
+		basic_machine=h8300-hitachi
+		os=-xray
+		;;
+	h8500hms)
+		basic_machine=h8500-hitachi
+		os=-hms
+		;;
+	harris)
+		basic_machine=m88k-harris
+		os=-sysv3
+		;;
+	hp300-*)
+		basic_machine=m68k-hp
+		;;
+	hp300bsd)
+		basic_machine=m68k-hp
+		os=-bsd
+		;;
+	hp300hpux)
+		basic_machine=m68k-hp
+		os=-hpux
+		;;
+	hp3k9[0-9][0-9] | hp9[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k2[0-9][0-9] | hp9k31[0-9])
+		basic_machine=m68000-hp
+		;;
+	hp9k3[2-9][0-9])
+		basic_machine=m68k-hp
+		;;
+	hp9k6[0-9][0-9] | hp6[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k7[0-79][0-9] | hp7[0-79][0-9])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k78[0-9] | hp78[0-9])
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][13679] | hp8[0-9][13679])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][0-9] | hp8[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hppa-next)
+		os=-nextstep3
+		;;
+	hppaosf)
+		basic_machine=hppa1.1-hp
+		os=-osf
+		;;
+	hppro)
+		basic_machine=hppa1.1-hp
+		os=-proelf
+		;;
+	i370-ibm* | ibm*)
+		basic_machine=i370-ibm
+		;;
+# I'm not sure what "Sysv32" means.  Should this be sysv3.2?
+	i*86v32)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv32
+		;;
+	i*86v4*)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv4
+		;;
+	i*86v)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv
+		;;
+	i*86sol2)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-solaris2
+		;;
+	i386mach)
+		basic_machine=i386-mach
+		os=-mach
+		;;
+	i386-vsta | vsta)
+		basic_machine=i386-unknown
+		os=-vsta
+		;;
+	iris | iris4d)
+		basic_machine=mips-sgi
+		case $os in
+		    -irix*)
+			;;
+		    *)
+			os=-irix4
+			;;
+		esac
+		;;
+	isi68 | isi)
+		basic_machine=m68k-isi
+		os=-sysv
+		;;
+	m88k-omron*)
+		basic_machine=m88k-omron
+		;;
+	magnum | m3230)
+		basic_machine=mips-mips
+		os=-sysv
+		;;
+	merlin)
+		basic_machine=ns32k-utek
+		os=-sysv
+		;;
+	mingw32)
+		basic_machine=i386-pc
+		os=-mingw32
+		;;
+	miniframe)
+		basic_machine=m68000-convergent
+		;;
+	*mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+	mips3*-*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
+		;;
+	mips3*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
+		;;
+	mmix*)
+		basic_machine=mmix-knuth
+		os=-mmixware
+		;;
+	monitor)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	morphos)
+		basic_machine=powerpc-unknown
+		os=-morphos
+		;;
+	msdos)
+		basic_machine=i386-pc
+		os=-msdos
+		;;
+	mvs)
+		basic_machine=i370-ibm
+		os=-mvs
+		;;
+	ncr3000)
+		basic_machine=i486-ncr
+		os=-sysv4
+		;;
+	netbsd386)
+		basic_machine=i386-unknown
+		os=-netbsd
+		;;
+	netwinder)
+		basic_machine=armv4l-rebel
+		os=-linux
+		;;
+	news | news700 | news800 | news900)
+		basic_machine=m68k-sony
+		os=-newsos
+		;;
+	news1000)
+		basic_machine=m68030-sony
+		os=-newsos
+		;;
+	news-3600 | risc-news)
+		basic_machine=mips-sony
+		os=-newsos
+		;;
+	necv70)
+		basic_machine=v70-nec
+		os=-sysv
+		;;
+	next | m*-next )
+		basic_machine=m68k-next
+		case $os in
+		    -nextstep* )
+			;;
+		    -ns2*)
+		      os=-nextstep2
+			;;
+		    *)
+		      os=-nextstep3
+			;;
+		esac
+		;;
+	nh3000)
+		basic_machine=m68k-harris
+		os=-cxux
+		;;
+	nh[45]000)
+		basic_machine=m88k-harris
+		os=-cxux
+		;;
+	nindy960)
+		basic_machine=i960-intel
+		os=-nindy
+		;;
+	mon960)
+		basic_machine=i960-intel
+		os=-mon960
+		;;
+	nonstopux)
+		basic_machine=mips-compaq
+		os=-nonstopux
+		;;
+	np1)
+		basic_machine=np1-gould
+		;;
+	nsr-tandem)
+		basic_machine=nsr-tandem
+		;;
+	op50n-* | op60c-*)
+		basic_machine=hppa1.1-oki
+		os=-proelf
+		;;
+	or32 | or32-*)
+		basic_machine=or32-unknown
+		os=-coff
+		;;
+	OSE68000 | ose68000)
+		basic_machine=m68000-ericsson
+		os=-ose
+		;;
+	os68k)
+		basic_machine=m68k-none
+		os=-os68k
+		;;
+	pa-hitachi)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	paragon)
+		basic_machine=i860-intel
+		os=-osf
+		;;
+	pbd)
+		basic_machine=sparc-tti
+		;;
+	pbb)
+		basic_machine=m68k-tti
+		;;
+	pc532 | pc532-*)
+		basic_machine=ns32k-pc532
+		;;
+	pentium | p5 | k5 | k6 | nexgen | viac3)
+		basic_machine=i586-pc
+		;;
+	pentiumpro | p6 | 6x86 | athlon | athlon_*)
+		basic_machine=i686-pc
+		;;
+	pentiumii | pentium2)
+		basic_machine=i686-pc
+		;;
+	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
+		basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentiumpro-* | p6-* | 6x86-* | athlon-*)
+		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentiumii-* | pentium2-*)
+		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pn)
+		basic_machine=pn-gould
+		;;
+	power)	basic_machine=power-ibm
+		;;
+	ppc)	basic_machine=powerpc-unknown
+		;;
+	ppc-*)	basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppcle | powerpclittle | ppc-le | powerpc-little)
+		basic_machine=powerpcle-unknown
+		;;
+	ppcle-* | powerpclittle-*)
+		basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppc64)	basic_machine=powerpc64-unknown
+		;;
+	ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppc64le | powerpc64little | ppc64-le | powerpc64-little)
+		basic_machine=powerpc64le-unknown
+		;;
+	ppc64le-* | powerpc64little-*)
+		basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ps2)
+		basic_machine=i386-ibm
+		;;
+	pw32)
+		basic_machine=i586-unknown
+		os=-pw32
+		;;
+	rom68k)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	rm[46]00)
+		basic_machine=mips-siemens
+		;;
+	rtpc | rtpc-*)
+		basic_machine=romp-ibm
+		;;
+	s390 | s390-*)
+		basic_machine=s390-ibm
+		;;
+	s390x | s390x-*)
+		basic_machine=s390x-ibm
+		;;
+	sa29200)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	sb1)
+		basic_machine=mipsisa64sb1-unknown
+		;;
+	sb1el)
+		basic_machine=mipsisa64sb1el-unknown
+		;;
+	sequent)
+		basic_machine=i386-sequent
+		;;
+	sh)
+		basic_machine=sh-hitachi
+		os=-hms
+		;;
+	sparclite-wrs | simso-wrs)
+		basic_machine=sparclite-wrs
+		os=-vxworks
+		;;
+	sps7)
+		basic_machine=m68k-bull
+		os=-sysv2
+		;;
+	spur)
+		basic_machine=spur-unknown
+		;;
+	st2000)
+		basic_machine=m68k-tandem
+		;;
+	stratus)
+		basic_machine=i860-stratus
+		os=-sysv4
+		;;
+	sun2)
+		basic_machine=m68000-sun
+		;;
+	sun2os3)
+		basic_machine=m68000-sun
+		os=-sunos3
+		;;
+	sun2os4)
+		basic_machine=m68000-sun
+		os=-sunos4
+		;;
+	sun3os3)
+		basic_machine=m68k-sun
+		os=-sunos3
+		;;
+	sun3os4)
+		basic_machine=m68k-sun
+		os=-sunos4
+		;;
+	sun4os3)
+		basic_machine=sparc-sun
+		os=-sunos3
+		;;
+	sun4os4)
+		basic_machine=sparc-sun
+		os=-sunos4
+		;;
+	sun4sol2)
+		basic_machine=sparc-sun
+		os=-solaris2
+		;;
+	sun3 | sun3-*)
+		basic_machine=m68k-sun
+		;;
+	sun4)
+		basic_machine=sparc-sun
+		;;
+	sun386 | sun386i | roadrunner)
+		basic_machine=i386-sun
+		;;
+	sv1)
+		basic_machine=sv1-cray
+		os=-unicos
+		;;
+	symmetry)
+		basic_machine=i386-sequent
+		os=-dynix
+		;;
+	t3d)
+		basic_machine=alpha-cray
+		os=-unicos
+		;;
+	t3e)
+		basic_machine=alphaev5-cray
+		os=-unicos
+		;;
+	t90)
+		basic_machine=t90-cray
+		os=-unicos
+		;;
+        tic4x | c4x*)
+		basic_machine=tic4x-unknown
+		os=-coff
+		;;
+	tic54x | c54x*)
+		basic_machine=tic54x-unknown
+		os=-coff
+		;;
+	tx39)
+		basic_machine=mipstx39-unknown
+		;;
+	tx39el)
+		basic_machine=mipstx39el-unknown
+		;;
+	toad1)
+		basic_machine=pdp10-xkl
+		os=-tops20
+		;;
+	tower | tower-32)
+		basic_machine=m68k-ncr
+		;;
+	udi29k)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	ultra3)
+		basic_machine=a29k-nyu
+		os=-sym1
+		;;
+	v810 | necv810)
+		basic_machine=v810-nec
+		os=-none
+		;;
+	vaxv)
+		basic_machine=vax-dec
+		os=-sysv
+		;;
+	vms)
+		basic_machine=vax-dec
+		os=-vms
+		;;
+	vpp*|vx|vx-*)
+		basic_machine=f301-fujitsu
+		;;
+	vxworks960)
+		basic_machine=i960-wrs
+		os=-vxworks
+		;;
+	vxworks68)
+		basic_machine=m68k-wrs
+		os=-vxworks
+		;;
+	vxworks29k)
+		basic_machine=a29k-wrs
+		os=-vxworks
+		;;
+	w65*)
+		basic_machine=w65-wdc
+		os=-none
+		;;
+	w89k-*)
+		basic_machine=hppa1.1-winbond
+		os=-proelf
+		;;
+	xps | xps100)
+		basic_machine=xps100-honeywell
+		;;
+	ymp)
+		basic_machine=ymp-cray
+		os=-unicos
+		;;
+	z8k-*-coff)
+		basic_machine=z8k-unknown
+		os=-sim
+		;;
+	none)
+		basic_machine=none-none
+		os=-none
+		;;
+
+# Here we handle the default manufacturer of certain CPU types.  It is in
+# some cases the only manufacturer, in others, it is the most popular.
+	w89k)
+		basic_machine=hppa1.1-winbond
+		;;
+	op50n)
+		basic_machine=hppa1.1-oki
+		;;
+	op60c)
+		basic_machine=hppa1.1-oki
+		;;
+	romp)
+		basic_machine=romp-ibm
+		;;
+	rs6000)
+		basic_machine=rs6000-ibm
+		;;
+	vax)
+		basic_machine=vax-dec
+		;;
+	pdp10)
+		# there are many clones, so DEC is not a safe bet
+		basic_machine=pdp10-unknown
+		;;
+	pdp11)
+		basic_machine=pdp11-dec
+		;;
+	we32k)
+		basic_machine=we32k-att
+		;;
+	sh3 | sh4 | sh3eb | sh4eb | sh[1234]le | sh3ele)
+		basic_machine=sh-unknown
+		;;
+	sh64)
+		basic_machine=sh64-unknown
+		;;
+	sparc | sparcv9 | sparcv9b)
+		basic_machine=sparc-sun
+		;;
+	cydra)
+		basic_machine=cydra-cydrome
+		;;
+	orion)
+		basic_machine=orion-highlevel
+		;;
+	orion105)
+		basic_machine=clipper-highlevel
+		;;
+	mac | mpw | mac-mpw)
+		basic_machine=m68k-apple
+		;;
+	pmac | pmac-mpw)
+		basic_machine=powerpc-apple
+		;;
+	*-unknown)
+		# Make sure to match an already-canonicalized machine name.
+		;;
+	*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+esac
+
+# Here we canonicalize certain aliases for manufacturers.
+case $basic_machine in
+	*-digital*)
+		basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
+		;;
+	*-commodore*)
+		basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
+		;;
+	*)
+		;;
+esac
+
+# Decode manufacturer-specific aliases for certain operating systems.
+
+if [ x"$os" != x"" ]
+then
+case $os in
+        # First match some system type aliases
+        # that might get confused with valid system types.
+	# -solaris* is a basic system type, with this one exception.
+	-solaris1 | -solaris1.*)
+		os=`echo $os | sed -e 's|solaris1|sunos4|'`
+		;;
+	-solaris)
+		os=-solaris2
+		;;
+	-svr4*)
+		os=-sysv4
+		;;
+	-unixware*)
+		os=-sysv4.2uw
+		;;
+	-gnu/linux*)
+		os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
+		;;
+	# First accept the basic system types.
+	# The portable systems comes first.
+	# Each alternative MUST END IN A *, to match a version number.
+	# -sysv* is not here because it comes later, after sysvr4.
+	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
+	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]*\
+	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
+	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
+	      | -aos* \
+	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
+	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
+	      | -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
+	      | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
+	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
+	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
+	      | -chorusos* | -chorusrdb* \
+	      | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+	      | -mingw32* | -linux-gnu* | -uxpv* | -beos* | -mpeix* | -udk* \
+	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
+	      | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
+	      | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
+	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
+	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
+	      | -powermax* | -dnix*)
+	# Remember, each alternative MUST END IN *, to match a version number.
+		;;
+	-qnx*)
+		case $basic_machine in
+		    x86-* | i*86-*)
+			;;
+		    *)
+			os=-nto$os
+			;;
+		esac
+		;;
+	-nto-qnx*)
+		;;
+	-nto*)
+		os=`echo $os | sed -e 's|nto|nto-qnx|'`
+		;;
+	-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
+	      | -windows* | -osx | -abug | -netware* | -os9* | -beos* \
+	      | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
+		;;
+	-mac*)
+		os=`echo $os | sed -e 's|mac|macos|'`
+		;;
+	-linux*)
+		os=`echo $os | sed -e 's|linux|linux-gnu|'`
+		;;
+	-sunos5*)
+		os=`echo $os | sed -e 's|sunos5|solaris2|'`
+		;;
+	-sunos6*)
+		os=`echo $os | sed -e 's|sunos6|solaris3|'`
+		;;
+	-opened*)
+		os=-openedition
+		;;
+	-wince*)
+		os=-wince
+		;;
+	-osfrose*)
+		os=-osfrose
+		;;
+	-osf*)
+		os=-osf
+		;;
+	-utek*)
+		os=-bsd
+		;;
+	-dynix*)
+		os=-bsd
+		;;
+	-acis*)
+		os=-aos
+		;;
+	-atheos*)
+		os=-atheos
+		;;
+	-386bsd)
+		os=-bsd
+		;;
+	-ctix* | -uts*)
+		os=-sysv
+		;;
+	-nova*)
+		os=-rtmk-nova
+		;;
+	-ns2 )
+		os=-nextstep2
+		;;
+	-nsk*)
+		os=-nsk
+		;;
+	# Preserve the version number of sinix5.
+	-sinix5.*)
+		os=`echo $os | sed -e 's|sinix|sysv|'`
+		;;
+	-sinix*)
+		os=-sysv4
+		;;
+	-triton*)
+		os=-sysv3
+		;;
+	-oss*)
+		os=-sysv3
+		;;
+	-svr4)
+		os=-sysv4
+		;;
+	-svr3)
+		os=-sysv3
+		;;
+	-sysvr4)
+		os=-sysv4
+		;;
+	# This must come after -sysvr4.
+	-sysv*)
+		;;
+	-ose*)
+		os=-ose
+		;;
+	-es1800*)
+		os=-ose
+		;;
+	-xenix)
+		os=-xenix
+		;;
+	-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+		os=-mint
+		;;
+	-none)
+		;;
+	*)
+		# Get rid of the `-' at the beginning of $os.
+		os=`echo $os | sed 's/[^-]*-//'`
+		echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
+		exit 1
+		;;
+esac
+else
+
+# Here we handle the default operating systems that come with various machines.
+# The value should be what the vendor currently ships out the door with their
+# machine or put another way, the most popular os provided with the machine.
+
+# Note that if you're going to try to match "-MANUFACTURER" here (say,
+# "-sun"), then you have to tell the case statement up towards the top
+# that MANUFACTURER isn't an operating system.  Otherwise, code above
+# will signal an error saying that MANUFACTURER isn't an operating
+# system, and we'll never get to this point.
+
+case $basic_machine in
+	*-acorn)
+		os=-riscix1.2
+		;;
+	arm*-rebel)
+		os=-linux
+		;;
+	arm*-semi)
+		os=-aout
+		;;
+	# This must come before the *-dec entry.
+	pdp10-*)
+		os=-tops20
+		;;
+	pdp11-*)
+		os=-none
+		;;
+	*-dec | vax-*)
+		os=-ultrix4.2
+		;;
+	m68*-apollo)
+		os=-domain
+		;;
+	i386-sun)
+		os=-sunos4.0.2
+		;;
+	m68000-sun)
+		os=-sunos3
+		# This also exists in the configure program, but was not the
+		# default.
+		# os=-sunos4
+		;;
+	m68*-cisco)
+		os=-aout
+		;;
+	mips*-cisco)
+		os=-elf
+		;;
+	mips*-*)
+		os=-elf
+		;;
+	or32-*)
+		os=-coff
+		;;
+	*-tti)	# must be before sparc entry or we get the wrong os.
+		os=-sysv3
+		;;
+	sparc-* | *-sun)
+		os=-sunos4.1.1
+		;;
+	*-be)
+		os=-beos
+		;;
+	*-ibm)
+		os=-aix
+		;;
+	*-wec)
+		os=-proelf
+		;;
+	*-winbond)
+		os=-proelf
+		;;
+	*-oki)
+		os=-proelf
+		;;
+	*-hp)
+		os=-hpux
+		;;
+	*-hitachi)
+		os=-hiux
+		;;
+	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
+		os=-sysv
+		;;
+	*-cbm)
+		os=-amigaos
+		;;
+	*-dg)
+		os=-dgux
+		;;
+	*-dolphin)
+		os=-sysv3
+		;;
+	m68k-ccur)
+		os=-rtu
+		;;
+	m88k-omron*)
+		os=-luna
+		;;
+	*-next )
+		os=-nextstep
+		;;
+	*-sequent)
+		os=-ptx
+		;;
+	*-crds)
+		os=-unos
+		;;
+	*-ns)
+		os=-genix
+		;;
+	i370-*)
+		os=-mvs
+		;;
+	*-next)
+		os=-nextstep3
+		;;
+	*-gould)
+		os=-sysv
+		;;
+	*-highlevel)
+		os=-bsd
+		;;
+	*-encore)
+		os=-bsd
+		;;
+	*-sgi)
+		os=-irix
+		;;
+	*-siemens)
+		os=-sysv4
+		;;
+	*-masscomp)
+		os=-rtu
+		;;
+	f30[01]-fujitsu | f700-fujitsu)
+		os=-uxpv
+		;;
+	*-rom68k)
+		os=-coff
+		;;
+	*-*bug)
+		os=-coff
+		;;
+	*-apple)
+		os=-macos
+		;;
+	*-atari*)
+		os=-mint
+		;;
+	*)
+		os=-none
+		;;
+esac
+fi
+
+# Here we handle the case where we know the os, and the CPU type, but not the
+# manufacturer.  We pick the logical manufacturer.
+vendor=unknown
+case $basic_machine in
+	*-unknown)
+		case $os in
+			-riscix*)
+				vendor=acorn
+				;;
+			-sunos*)
+				vendor=sun
+				;;
+			-aix*)
+				vendor=ibm
+				;;
+			-beos*)
+				vendor=be
+				;;
+			-hpux*)
+				vendor=hp
+				;;
+			-mpeix*)
+				vendor=hp
+				;;
+			-hiux*)
+				vendor=hitachi
+				;;
+			-unos*)
+				vendor=crds
+				;;
+			-dgux*)
+				vendor=dg
+				;;
+			-luna*)
+				vendor=omron
+				;;
+			-genix*)
+				vendor=ns
+				;;
+			-mvs* | -opened*)
+				vendor=ibm
+				;;
+			-ptx*)
+				vendor=sequent
+				;;
+			-vxsim* | -vxworks* | -windiss*)
+				vendor=wrs
+				;;
+			-aux*)
+				vendor=apple
+				;;
+			-hms*)
+				vendor=hitachi
+				;;
+			-mpw* | -macos*)
+				vendor=apple
+				;;
+			-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+				vendor=atari
+				;;
+			-vos*)
+				vendor=stratus
+				;;
+		esac
+		basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
+		;;
+esac
+
+echo $basic_machine$os
+exit 0
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/external-libs/pcre/configure b/external-libs/pcre/configure
new file mode 100644
index 00000000..da706e01
--- /dev/null
+++ b/external-libs/pcre/configure
@@ -0,0 +1,8927 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.57.
+#
+# Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
+# Free Software Foundation, Inc.
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## --------------------- ##
+## M4sh Initialization.  ##
+## --------------------- ##
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
+  set -o posix
+fi
+
+# Support unset when possible.
+if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+
+# Work around bugs in pre-3.0 UWIN ksh.
+$as_unset ENV MAIL MAILPATH
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+for as_var in \
+  LANG LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE LC_IDENTIFICATION \
+  LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER \
+  LC_TELEPHONE LC_TIME
+do
+  if (set +x; test -n "`(eval $as_var=C; export $as_var) 2>&1`"); then
+    eval $as_var=C; export $as_var
+  else
+    $as_unset $as_var
+  fi
+done
+
+# Required to use basename.
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename /) >/dev/null 2>&1 && test "X`basename / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+
+# Name of the executable.
+as_me=`$as_basename "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)$' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{ s//\1/; q; }
+  	  /^X\/\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\/\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+
+
+# PATH needs CR, and LINENO needs CR and PATH.
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  echo "#! /bin/sh" >conf$$.sh
+  echo  "exit 0"   >>conf$$.sh
+  chmod +x conf$$.sh
+  if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
+    PATH_SEPARATOR=';'
+  else
+    PATH_SEPARATOR=:
+  fi
+  rm -f conf$$.sh
+fi
+
+
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2"  || {
+  # Find who we are.  Look in the path if we contain no path at all
+  # relative or not.
+  case $0 in
+    *[\\/]* ) as_myself=$0 ;;
+    *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+done
+
+       ;;
+  esac
+  # We did not find ourselves, most probably we were run as `sh COMMAND'
+  # in which case we are not to be found in the path.
+  if test "x$as_myself" = x; then
+    as_myself=$0
+  fi
+  if test ! -f "$as_myself"; then
+    { echo "$as_me: error: cannot find myself; rerun with an absolute path" >&2
+   { (exit 1); exit 1; }; }
+  fi
+  case $CONFIG_SHELL in
+  '')
+    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for as_base in sh bash ksh sh5; do
+	 case $as_dir in
+	 /*)
+	   if ("$as_dir/$as_base" -c '
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2" ') 2>/dev/null; then
+	     $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { BASH_ENV=; export BASH_ENV; }
+	     $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; }
+	     CONFIG_SHELL=$as_dir/$as_base
+	     export CONFIG_SHELL
+	     exec "$CONFIG_SHELL" "$0" ${1+"$@"}
+	   fi;;
+	 esac
+       done
+done
+;;
+  esac
+
+  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
+  # uniformly replaced by the line number.  The first 'sed' inserts a
+  # line-number line before each line; the second 'sed' does the real
+  # work.  The second script uses 'N' to pair each line-number line
+  # with the numbered line, and appends trailing '-' during
+  # substitution so that $LINENO is not a special case at line end.
+  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
+  # second 'sed' script.  Blame Lee E. McMahon for sed's syntax.  :-)
+  sed '=' <$as_myself |
+    sed '
+      N
+      s,$,-,
+      : loop
+      s,^\(['$as_cr_digits']*\)\(.*\)[$]LINENO\([^'$as_cr_alnum'_]\),\1\2\1\3,
+      t loop
+      s,-$,,
+      s,^['$as_cr_digits']*\n,,
+    ' >$as_me.lineno &&
+  chmod +x $as_me.lineno ||
+    { echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2
+   { (exit 1); exit 1; }; }
+
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensible to this).
+  . ./$as_me.lineno
+  # Exit status is that of the last command.
+  exit
+}
+
+
+case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
+  *c*,-n*) ECHO_N= ECHO_C='
+' ECHO_T='	' ;;
+  *c*,*  ) ECHO_N=-n ECHO_C= ECHO_T= ;;
+  *)       ECHO_N= ECHO_C='\c' ECHO_T= ;;
+esac
+
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+rm -f conf$$ conf$$.exe conf$$.file
+echo >conf$$.file
+if ln -s conf$$.file conf$$ 2>/dev/null; then
+  # We could just check for DJGPP; but this test a) works b) is more generic
+  # and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
+  if test -f conf$$.exe; then
+    # Don't use ln at all; we don't have any links
+    as_ln_s='cp -p'
+  else
+    as_ln_s='ln -s'
+  fi
+elif ln conf$$.file conf$$ 2>/dev/null; then
+  as_ln_s=ln
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.file
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p=:
+else
+  as_mkdir_p=false
+fi
+
+as_executable_p="test -f"
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="sed y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="sed y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.
+as_nl='
+'
+IFS=" 	$as_nl"
+
+# CDPATH.
+$as_unset CDPATH
+
+
+# Find the correct PATH separator.  Usually this is `:', but
+# DJGPP uses `;' like DOS.
+if test "X${PATH_SEPARATOR+set}" != Xset; then
+  UNAME=${UNAME-`uname 2>/dev/null`}
+  case X$UNAME in
+    *-DOS) lt_cv_sys_path_separator=';' ;;
+    *)     lt_cv_sys_path_separator=':' ;;
+  esac
+fi
+
+
+# Check that we are running under the correct shell.
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+case X$ECHO in
+X*--fallback-echo)
+  # Remove one level of quotation (which was required for Make).
+  ECHO=`echo "$ECHO" | sed 's,\\\\\$\\$0,'$0','`
+  ;;
+esac
+
+echo=${ECHO-echo}
+if test "X$1" = X--no-reexec; then
+  # Discard the --no-reexec flag, and continue.
+  shift
+elif test "X$1" = X--fallback-echo; then
+  # Avoid inline document here, it may be left over
+  :
+elif test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then
+  # Yippee, $echo works!
+  :
+else
+  # Restart under the correct shell.
+  exec $SHELL "$0" --no-reexec ${1+"$@"}
+fi
+
+if test "X$1" = X--fallback-echo; then
+  # used as fallback echo
+  shift
+  cat <<EOF
+
+EOF
+  exit 0
+fi
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+if test "X${CDPATH+set}" = Xset; then CDPATH=:; export CDPATH; fi
+
+if test -z "$ECHO"; then
+if test "X${echo_test_string+set}" != Xset; then
+# find a string as large as possible, as long as the shell can cope with it
+  for cmd in 'sed 50q "$0"' 'sed 20q "$0"' 'sed 10q "$0"' 'sed 2q "$0"' 'echo test'; do
+    # expected sizes: less than 2Kb, 1Kb, 512 bytes, 16 bytes, ...
+    if (echo_test_string="`eval $cmd`") 2>/dev/null &&
+       echo_test_string="`eval $cmd`" &&
+       (test "X$echo_test_string" = "X$echo_test_string") 2>/dev/null
+    then
+      break
+    fi
+  done
+fi
+
+if test "X`($echo '\t') 2>/dev/null`" = 'X\t' &&
+   echo_testing_string=`($echo "$echo_test_string") 2>/dev/null` &&
+   test "X$echo_testing_string" = "X$echo_test_string"; then
+  :
+else
+  # The Solaris, AIX, and Digital Unix default echo programs unquote
+  # backslashes.  This makes it impossible to quote backslashes using
+  #   echo "$something" | sed 's/\\/\\\\/g'
+  #
+  # So, first we look for a working echo in the user's PATH.
+
+  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR}"
+  for dir in $PATH /usr/ucb; do
+    if (test -f $dir/echo || test -f $dir/echo$ac_exeext) &&
+       test "X`($dir/echo '\t') 2>/dev/null`" = 'X\t' &&
+       echo_testing_string=`($dir/echo "$echo_test_string") 2>/dev/null` &&
+       test "X$echo_testing_string" = "X$echo_test_string"; then
+      echo="$dir/echo"
+      break
+    fi
+  done
+  IFS="$save_ifs"
+
+  if test "X$echo" = Xecho; then
+    # We didn't find a better echo, so look for alternatives.
+    if test "X`(print -r '\t') 2>/dev/null`" = 'X\t' &&
+       echo_testing_string=`(print -r "$echo_test_string") 2>/dev/null` &&
+       test "X$echo_testing_string" = "X$echo_test_string"; then
+      # This shell has a builtin print -r that does the trick.
+      echo='print -r'
+    elif (test -f /bin/ksh || test -f /bin/ksh$ac_exeext) &&
+	 test "X$CONFIG_SHELL" != X/bin/ksh; then
+      # If we have ksh, try running configure again with it.
+      ORIGINAL_CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+      export ORIGINAL_CONFIG_SHELL
+      CONFIG_SHELL=/bin/ksh
+      export CONFIG_SHELL
+      exec $CONFIG_SHELL "$0" --no-reexec ${1+"$@"}
+    else
+      # Try using printf.
+      echo='printf %s\n'
+      if test "X`($echo '\t') 2>/dev/null`" = 'X\t' &&
+	 echo_testing_string=`($echo "$echo_test_string") 2>/dev/null` &&
+	 test "X$echo_testing_string" = "X$echo_test_string"; then
+	# Cool, printf works
+	:
+      elif echo_testing_string=`($ORIGINAL_CONFIG_SHELL "$0" --fallback-echo '\t') 2>/dev/null` &&
+	   test "X$echo_testing_string" = 'X\t' &&
+	   echo_testing_string=`($ORIGINAL_CONFIG_SHELL "$0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	   test "X$echo_testing_string" = "X$echo_test_string"; then
+	CONFIG_SHELL=$ORIGINAL_CONFIG_SHELL
+	export CONFIG_SHELL
+	SHELL="$CONFIG_SHELL"
+	export SHELL
+	echo="$CONFIG_SHELL $0 --fallback-echo"
+      elif echo_testing_string=`($CONFIG_SHELL "$0" --fallback-echo '\t') 2>/dev/null` &&
+	   test "X$echo_testing_string" = 'X\t' &&
+	   echo_testing_string=`($CONFIG_SHELL "$0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	   test "X$echo_testing_string" = "X$echo_test_string"; then
+	echo="$CONFIG_SHELL $0 --fallback-echo"
+      else
+	# maybe with a smaller string...
+	prev=:
+
+	for cmd in 'echo test' 'sed 2q "$0"' 'sed 10q "$0"' 'sed 20q "$0"' 'sed 50q "$0"'; do
+	  if (test "X$echo_test_string" = "X`eval $cmd`") 2>/dev/null
+	  then
+	    break
+	  fi
+	  prev="$cmd"
+	done
+
+	if test "$prev" != 'sed 50q "$0"'; then
+	  echo_test_string=`eval $prev`
+	  export echo_test_string
+	  exec ${ORIGINAL_CONFIG_SHELL-${CONFIG_SHELL-/bin/sh}} "$0" ${1+"$@"}
+	else
+	  # Oops.  We lost completely, so just stick with echo.
+	  echo=echo
+	fi
+      fi
+    fi
+  fi
+fi
+fi
+
+# Copy echo and quote the copy suitably for passing to libtool from
+# the Makefile, instead of quoting the original, which is used later.
+ECHO=$echo
+if test "X$ECHO" = "X$CONFIG_SHELL $0 --fallback-echo"; then
+   ECHO="$CONFIG_SHELL \\\$\$0 --fallback-echo"
+fi
+
+
+
+# Name of the host.
+# hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+exec 6>&1
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_config_libobj_dir=.
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+# Maximum number of lines to put in a shell here document.
+# This variable seems obsolete.  It should probably be removed, and
+# only ac_max_sed_lines should be used.
+: ${ac_max_here_lines=38}
+
+# Identity of this package.
+PACKAGE_NAME=
+PACKAGE_TARNAME=
+PACKAGE_VERSION=
+PACKAGE_STRING=
+PACKAGE_BUGREPORT=
+
+ac_unique_file="dftables.c"
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stdio.h>
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#if HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#if STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# if HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif
+#if HAVE_STRING_H
+# if !STDC_HEADERS && HAVE_MEMORY_H
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif
+#if HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#if HAVE_INTTYPES_H
+# include <inttypes.h>
+#else
+# if HAVE_STDINT_H
+#  include <stdint.h>
+# endif
+#endif
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA build build_cpu build_vendor build_os host host_cpu host_vendor host_os LN_S ECHO RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP CPP EGREP LIBTOOL BUILD_EXEEXT BUILD_OBJEXT CC_FOR_BUILD CFLAGS_FOR_BUILD EBCDIC HAVE_MEMMOVE HAVE_STRERROR LINK_SIZE MATCH_LIMIT NEWLINE NO_RECURSE PCRE_MAJOR PCRE_MINOR PCRE_DATE PCRE_VERSION PCRE_LIB_VERSION PCRE_POSIXLIB_VERSION POSIX_MALLOC_THRESHOLD UTF8 WIN_PREFIX ON_WINDOWS NOT_ON_WINDOWS POSIX_OBJ POSIX_LOBJ POSIX_LIB LIBOBJS LTLIBOBJS'
+ac_subst_files=''
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datadir='${prefix}/share'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+libdir='${exec_prefix}/lib'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+infodir='${prefix}/info'
+mandir='${prefix}/man'
+
+ac_prev=
+for ac_option
+do
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval "$ac_prev=\$ac_option"
+    ac_prev=
+    continue
+  fi
+
+  ac_optarg=`expr "x$ac_option" : 'x[^=]*=\(.*\)'`
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case $ac_option in
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir=$ac_optarg ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build_alias ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build_alias=$ac_optarg ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file=$ac_optarg ;;
+
+  --config-cache | -C)
+    cache_file=config.cache ;;
+
+  -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+  | --da=*)
+    datadir=$ac_optarg ;;
+
+  -disable-* | --disable-*)
+    ac_feature=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_feature" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid feature name: $ac_feature" >&2
+   { (exit 1); exit 1; }; }
+    ac_feature=`echo $ac_feature | sed 's/-/_/g'`
+    eval "enable_$ac_feature=no" ;;
+
+  -enable-* | --enable-*)
+    ac_feature=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_feature" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid feature name: $ac_feature" >&2
+   { (exit 1); exit 1; }; }
+    ac_feature=`echo $ac_feature | sed 's/-/_/g'`
+    case $ac_option in
+      *=*) ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "enable_$ac_feature='$ac_optarg'" ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix=$ac_optarg ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he | -h)
+    ac_init_help=long ;;
+  -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
+    ac_init_help=recursive ;;
+  -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
+    ac_init_help=short ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host_alias ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host_alias=$ac_optarg ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir=$ac_optarg ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir=$ac_optarg ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir=$ac_optarg ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir=$ac_optarg ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst \
+  | --locals | --local | --loca | --loc | --lo)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+  | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+    localstatedir=$ac_optarg ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir=$ac_optarg ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c | -n)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_package=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_package" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid package name: $ac_package" >&2
+   { (exit 1); exit 1; }; }
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    case $ac_option in
+      *=*) ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "with_$ac_package='$ac_optarg'" ;;
+
+  -without-* | --without-*)
+    ac_package=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_package" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid package name: $ac_package" >&2
+   { (exit 1); exit 1; }; }
+    ac_package=`echo $ac_package | sed 's/-/_/g'`
+    eval "with_$ac_package=no" ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) { echo "$as_me: error: unrecognized option: $ac_option
+Try \`$0 --help' for more information." >&2
+   { (exit 1); exit 1; }; }
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_envvar" : ".*[^_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid variable name: $ac_envvar" >&2
+   { (exit 1); exit 1; }; }
+    ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`
+    eval "$ac_envvar='$ac_optarg'"
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      echo "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  { echo "$as_me: error: missing argument to $ac_option" >&2
+   { (exit 1); exit 1; }; }
+fi
+
+# Be sure to have absolute paths.
+for ac_var in exec_prefix prefix
+do
+  eval ac_val=$`echo $ac_var`
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* | NONE | '' ) ;;
+    *)  { echo "$as_me: error: expected an absolute directory name for --$ac_var: $ac_val" >&2
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# Be sure to have absolute paths.
+for ac_var in bindir sbindir libexecdir datadir sysconfdir sharedstatedir \
+              localstatedir libdir includedir oldincludedir infodir mandir
+do
+  eval ac_val=$`echo $ac_var`
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* ) ;;
+    *)  { echo "$as_me: error: expected an absolute directory name for --$ac_var: $ac_val" >&2
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+    echo "$as_me: WARNING: If you wanted to set the --build type, don't use --host.
+    If a cross compiler is detected then cross compile mode will be used." >&2
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then its parent.
+  ac_confdir=`(dirname "$0") 2>/dev/null ||
+$as_expr X"$0" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$0" : 'X\(//\)[^/]' \| \
+         X"$0" : 'X\(//\)$' \| \
+         X"$0" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$0" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r $srcdir/$ac_unique_file; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+  if test "$ac_srcdir_defaulted" = yes; then
+    { echo "$as_me: error: cannot find sources ($ac_unique_file) in $ac_confdir or .." >&2
+   { (exit 1); exit 1; }; }
+  else
+    { echo "$as_me: error: cannot find sources ($ac_unique_file) in $srcdir" >&2
+   { (exit 1); exit 1; }; }
+  fi
+fi
+(cd $srcdir && test -r ./$ac_unique_file) 2>/dev/null ||
+  { echo "$as_me: error: sources are in $srcdir, but \`cd $srcdir' does not work" >&2
+   { (exit 1); exit 1; }; }
+srcdir=`echo "$srcdir" | sed 's%\([^\\/]\)[\\/]*$%\1%'`
+ac_env_build_alias_set=${build_alias+set}
+ac_env_build_alias_value=$build_alias
+ac_cv_env_build_alias_set=${build_alias+set}
+ac_cv_env_build_alias_value=$build_alias
+ac_env_host_alias_set=${host_alias+set}
+ac_env_host_alias_value=$host_alias
+ac_cv_env_host_alias_set=${host_alias+set}
+ac_cv_env_host_alias_value=$host_alias
+ac_env_target_alias_set=${target_alias+set}
+ac_env_target_alias_value=$target_alias
+ac_cv_env_target_alias_set=${target_alias+set}
+ac_cv_env_target_alias_value=$target_alias
+ac_env_CC_set=${CC+set}
+ac_env_CC_value=$CC
+ac_cv_env_CC_set=${CC+set}
+ac_cv_env_CC_value=$CC
+ac_env_CFLAGS_set=${CFLAGS+set}
+ac_env_CFLAGS_value=$CFLAGS
+ac_cv_env_CFLAGS_set=${CFLAGS+set}
+ac_cv_env_CFLAGS_value=$CFLAGS
+ac_env_LDFLAGS_set=${LDFLAGS+set}
+ac_env_LDFLAGS_value=$LDFLAGS
+ac_cv_env_LDFLAGS_set=${LDFLAGS+set}
+ac_cv_env_LDFLAGS_value=$LDFLAGS
+ac_env_CPPFLAGS_set=${CPPFLAGS+set}
+ac_env_CPPFLAGS_value=$CPPFLAGS
+ac_cv_env_CPPFLAGS_set=${CPPFLAGS+set}
+ac_cv_env_CPPFLAGS_value=$CPPFLAGS
+ac_env_CPP_set=${CPP+set}
+ac_env_CPP_value=$CPP
+ac_cv_env_CPP_set=${CPP+set}
+ac_cv_env_CPP_value=$CPP
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+    # The list generated by autoconf has been trimmed to remove many
+    # options that are totally irrelevant to PCRE (e.g. relating to X),
+    # or are not supported by its Makefile.
+    # The list generated by autoconf has been trimmed to remove many
+    # options that are totally irrelevant to PCRE (e.g. relating to X),
+    # or are not supported by its Makefile.
+    # The list generated by autoconf has been trimmed to remove many
+    # options that are totally irrelevant to PCRE (e.g. relating to X),
+    # or are not supported by its Makefile.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures this package to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+_ACEOF
+
+  cat <<_ACEOF
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR           user executables [EPREFIX/bin]
+  --libdir=DIR           object code libraries [EPREFIX/lib]
+  --includedir=DIR       C header files [PREFIX/include]
+  --mandir=DIR           man documentation [PREFIX/man]
+_ACEOF
+
+  cat <<\_ACEOF
+
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+
+  cat <<\_ACEOF
+
+Optional Features:
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-shared       build shared libraries default=yes
+  --enable-static       build static libraries default=yes
+  --enable-fast-install       optimize for fast installation default=yes
+  --disable-libtool-lock  avoid locking (might break parallel builds)
+  --enable-utf8           enable UTF8 support
+  --enable-newline-is-cr  use CR as the newline character
+  --enable-newline-is-lf  use LF as the newline character
+  --enable-ebcdic         assume EBCDIC coding rather than ASCII
+  --disable-stack-for-recursion  disable use of stack recursion when matching
+
+Optional Packages:
+  --with-gnu-ld           assume the C compiler uses GNU ld default=no
+  --with-pic              try to use only PIC/non-PIC objects default=use both
+  --with-posix-malloc-threshold=5  threshold for POSIX malloc usage
+  --with-link-size=2    internal link size (2, 3, or 4 allowed)
+  --with-match-limit=10000000      default limit on internal looping)
+
+Some influential environment variables:
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
+              headers in a nonstandard directory <include dir>
+  CPP         C preprocessor
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+_ACEOF
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  ac_popdir=`pwd`
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d $ac_dir || continue
+    ac_builddir=.
+
+if test "$ac_dir" != .; then
+  ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'`
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'`
+else
+  ac_dir_suffix= ac_top_builddir=
+fi
+
+case $srcdir in
+  .)  # No --srcdir option.  We are building in place.
+    ac_srcdir=.
+    if test -z "$ac_top_builddir"; then
+       ac_top_srcdir=.
+    else
+       ac_top_srcdir=`echo $ac_top_builddir | sed 's,/$,,'`
+    fi ;;
+  [\\/]* | ?:[\\/]* )  # Absolute path.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir ;;
+  *) # Relative path.
+    ac_srcdir=$ac_top_builddir$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_builddir$srcdir ;;
+esac
+# Don't blindly perform a `cd "$ac_dir"/$ac_foo && pwd` since $ac_foo can be
+# absolute.
+ac_abs_builddir=`cd "$ac_dir" && cd $ac_builddir && pwd`
+ac_abs_top_builddir=`cd "$ac_dir" && cd ${ac_top_builddir}. && pwd`
+ac_abs_srcdir=`cd "$ac_dir" && cd $ac_srcdir && pwd`
+ac_abs_top_srcdir=`cd "$ac_dir" && cd $ac_top_srcdir && pwd`
+
+    cd $ac_dir
+    # Check for guested configure; otherwise get Cygnus style configure.
+    if test -f $ac_srcdir/configure.gnu; then
+      echo
+      $SHELL $ac_srcdir/configure.gnu  --help=recursive
+    elif test -f $ac_srcdir/configure; then
+      echo
+      $SHELL $ac_srcdir/configure  --help=recursive
+    elif test -f $ac_srcdir/configure.ac ||
+           test -f $ac_srcdir/configure.in; then
+      echo
+      $ac_configure --help
+    else
+      echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi
+    cd $ac_popdir
+  done
+fi
+
+test -n "$ac_init_help" && exit 0
+if $ac_init_version; then
+  cat <<\_ACEOF
+
+Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
+Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit 0
+fi
+exec 5>config.log
+cat >&5 <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by $as_me, which was
+generated by GNU Autoconf 2.57.  Invocation command line was
+
+  $ $0 $@
+
+_ACEOF
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+hostinfo               = `(hostinfo) 2>/dev/null               || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  echo "PATH: $as_dir"
+done
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_sep=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)
+      ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) ac_configure_args0="$ac_configure_args0 '$ac_arg'" ;;
+    2)
+      ac_configure_args1="$ac_configure_args1 '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+        ac_must_keep_next=false # Got value, back to normal.
+      else
+        case $ac_arg in
+          *=* | --config-cache | -C | -disable-* | --disable-* \
+          | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+          | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+          | -with-* | --with-* | -without-* | --without-* | --x)
+            case "$ac_configure_args0 " in
+              "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+            esac
+            ;;
+          -* ) ac_must_keep_next=true ;;
+        esac
+      fi
+      ac_configure_args="$ac_configure_args$ac_sep'$ac_arg'"
+      # Get rid of the leading space.
+      ac_sep=" "
+      ;;
+    esac
+  done
+done
+$as_unset ac_configure_args0 || test "${ac_configure_args0+set}" != set || { ac_configure_args0=; export ac_configure_args0; }
+$as_unset ac_configure_args1 || test "${ac_configure_args1+set}" != set || { ac_configure_args1=; export ac_configure_args1; }
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Be sure not to use single quotes in there, as some shells,
+# such as our DU 5.0 friend, will then `close' the trap.
+trap 'exit_status=$?
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    cat <<\_ASBOX
+## ---------------- ##
+## Cache variables. ##
+## ---------------- ##
+_ASBOX
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+{
+  (set) 2>&1 |
+    case `(ac_space='"'"' '"'"'; set | grep ac_space) 2>&1` in
+    *ac_space=\ *)
+      sed -n \
+        "s/'"'"'/'"'"'\\\\'"'"''"'"'/g;
+    	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='"'"'\\2'"'"'/p"
+      ;;
+    *)
+      sed -n \
+        "s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p"
+      ;;
+    esac;
+}
+    echo
+
+    cat <<\_ASBOX
+## ----------------- ##
+## Output variables. ##
+## ----------------- ##
+_ASBOX
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=$`echo $ac_var`
+      echo "$ac_var='"'"'$ac_val'"'"'"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      cat <<\_ASBOX
+## ------------- ##
+## Output files. ##
+## ------------- ##
+_ASBOX
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=$`echo $ac_var`
+        echo "$ac_var='"'"'$ac_val'"'"'"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      cat <<\_ASBOX
+## ----------- ##
+## confdefs.h. ##
+## ----------- ##
+_ASBOX
+      echo
+      sed "/^$/d" confdefs.h | sort
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      echo "$as_me: caught signal $ac_signal"
+    echo "$as_me: exit $exit_status"
+  } >&5
+  rm -f core core.* *.core &&
+  rm -rf conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+     ' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; { (exit 1); exit 1; }' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo >confdefs.h
+
+# Predefined preprocessor variables.
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_NAME "$PACKAGE_NAME"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_STRING "$PACKAGE_STRING"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+_ACEOF
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer explicitly selected file to automatically selected ones.
+if test -z "$CONFIG_SITE"; then
+  if test "x$prefix" != xNONE; then
+    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+  else
+    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+  fi
+fi
+for ac_site_file in $CONFIG_SITE; do
+  if test -r "$ac_site_file"; then
+    { echo "$as_me:$LINENO: loading site script $ac_site_file" >&5
+echo "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file"
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special
+  # files actually), so we avoid doing that.
+  if test -f "$cache_file"; then
+    { echo "$as_me:$LINENO: loading cache $cache_file" >&5
+echo "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . $cache_file;;
+      *)                      . ./$cache_file;;
+    esac
+  fi
+else
+  { echo "$as_me:$LINENO: creating cache $cache_file" >&5
+echo "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in `(set) 2>&1 |
+               sed -n 's/^ac_env_\([a-zA-Z_0-9]*\)_set=.*/\1/p'`; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val="\$ac_cv_env_${ac_var}_value"
+  eval ac_new_val="\$ac_env_${ac_var}_value"
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { echo "$as_me:$LINENO: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { echo "$as_me:$LINENO: error: \`$ac_var' was not set in the previous run" >&5
+echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+        { echo "$as_me:$LINENO: error: \`$ac_var' has changed since the previous run:" >&5
+echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+        { echo "$as_me:$LINENO:   former value:  $ac_old_val" >&5
+echo "$as_me:   former value:  $ac_old_val" >&2;}
+        { echo "$as_me:$LINENO:   current value: $ac_new_val" >&5
+echo "$as_me:   current value: $ac_new_val" >&2;}
+        ac_cache_corrupted=:
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)
+      ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { echo "$as_me:$LINENO: error: changes in the environment can compromise the build" >&5
+echo "$as_me: error: changes in the environment can compromise the build" >&2;}
+  { { echo "$as_me:$LINENO: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&5
+echo "$as_me: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+          ac_config_headers="$ac_config_headers config.h:config.in"
+
+
+
+PCRE_MAJOR=4
+PCRE_MINOR=5
+PCRE_DATE=01-December-2003
+PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}
+
+
+POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10
+
+
+PCRE_LIB_VERSION=0:1:0
+PCRE_POSIXLIB_VERSION=0:0:0
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  CC=$ac_ct_CC
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  CC=$ac_ct_CC
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  test -n "$ac_ct_CC" && break
+done
+
+  CC=$ac_ct_CC
+fi
+
+fi
+
+
+test -z "$CC" && { { echo "$as_me:$LINENO: error: no acceptable C compiler found in \$PATH
+See \`config.log' for more details." >&5
+echo "$as_me: error: no acceptable C compiler found in \$PATH
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+
+# Provide some information about the compiler.
+echo "$as_me:$LINENO:" \
+     "checking for C compiler version" >&5
+ac_compiler=`set X $ac_compile; echo $2`
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
+  (eval $ac_compiler --version </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -v </dev/null >&5\"") >&5
+  (eval $ac_compiler -v </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -V </dev/null >&5\"") >&5
+  (eval $ac_compiler -V </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+echo "$as_me:$LINENO: checking for C compiler default output" >&5
+echo $ECHO_N "checking for C compiler default output... $ECHO_C" >&6
+ac_link_default=`echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+if { (eval echo "$as_me:$LINENO: \"$ac_link_default\"") >&5
+  (eval $ac_link_default) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  # Find the output, starting from the most likely.  This scheme is
+# not robust to junk in `.', hence go to wildcards (a.*) only as a last
+# resort.
+
+# Be careful to initialize this variable, since it used to be cached.
+# Otherwise an old cache value of `no' led to `EXEEXT = no' in a Makefile.
+ac_cv_exeext=
+# b.out is created by i960 compilers.
+for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.* b.out
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj )
+        ;;
+    conftest.$ac_ext )
+        # This is the source file.
+        ;;
+    [ab].out )
+        # We found the default executable, but exeext='' is most
+        # certainly right.
+        break;;
+    *.* )
+        ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+        # FIXME: I believe we export ac_cv_exeext for Libtool,
+        # but it would be cool to find out if it's true.  Does anybody
+        # maintain Libtool? --akim.
+        export ac_cv_exeext
+        break;;
+    * )
+        break;;
+  esac
+done
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { echo "$as_me:$LINENO: error: C compiler cannot create executables
+See \`config.log' for more details." >&5
+echo "$as_me: error: C compiler cannot create executables
+See \`config.log' for more details." >&2;}
+   { (exit 77); exit 77; }; }
+fi
+
+ac_exeext=$ac_cv_exeext
+echo "$as_me:$LINENO: result: $ac_file" >&5
+echo "${ECHO_T}$ac_file" >&6
+
+# Check the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+echo "$as_me:$LINENO: checking whether the C compiler works" >&5
+echo $ECHO_N "checking whether the C compiler works... $ECHO_C" >&6
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+  if { ac_try='./$ac_file'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { echo "$as_me:$LINENO: error: cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+    fi
+  fi
+fi
+echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+rm -f a.out a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+# Check the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+echo "$as_me:$LINENO: checking whether we are cross compiling" >&5
+echo $ECHO_N "checking whether we are cross compiling... $ECHO_C" >&6
+echo "$as_me:$LINENO: result: $cross_compiling" >&5
+echo "${ECHO_T}$cross_compiling" >&6
+
+echo "$as_me:$LINENO: checking for suffix of executables" >&5
+echo $ECHO_N "checking for suffix of executables... $ECHO_C" >&6
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+          export ac_cv_exeext
+          break;;
+    * ) break;;
+  esac
+done
+else
+  { { echo "$as_me:$LINENO: error: cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+rm -f conftest$ac_cv_exeext
+echo "$as_me:$LINENO: result: $ac_cv_exeext" >&5
+echo "${ECHO_T}$ac_cv_exeext" >&6
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+echo "$as_me:$LINENO: checking for suffix of object files" >&5
+echo $ECHO_N "checking for suffix of object files... $ECHO_C" >&6
+if test "${ac_cv_objext+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  for ac_file in `(ls conftest.o conftest.obj; ls conftest.*) 2>/dev/null`; do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { echo "$as_me:$LINENO: error: cannot compute suffix of object files: cannot compile
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot compute suffix of object files: cannot compile
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_objext" >&5
+echo "${ECHO_T}$ac_cv_objext" >&6
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+echo "$as_me:$LINENO: checking whether we are using the GNU C compiler" >&5
+echo $ECHO_N "checking whether we are using the GNU C compiler... $ECHO_C" >&6
+if test "${ac_cv_c_compiler_gnu+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_compiler_gnu=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_compiler_gnu=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+echo "$as_me:$LINENO: result: $ac_cv_c_compiler_gnu" >&5
+echo "${ECHO_T}$ac_cv_c_compiler_gnu" >&6
+GCC=`test $ac_compiler_gnu = yes && echo yes`
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+CFLAGS="-g"
+echo "$as_me:$LINENO: checking whether $CC accepts -g" >&5
+echo $ECHO_N "checking whether $CC accepts -g... $ECHO_C" >&6
+if test "${ac_cv_prog_cc_g+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_prog_cc_g=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_prog_cc_g=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5
+echo "${ECHO_T}$ac_cv_prog_cc_g" >&6
+if test "$ac_test_CFLAGS" = set; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+echo "$as_me:$LINENO: checking for $CC option to accept ANSI C" >&5
+echo $ECHO_N "checking for $CC option to accept ANSI C... $ECHO_C" >&6
+if test "${ac_cv_prog_cc_stdc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_prog_cc_stdc=no
+ac_save_CC=$CC
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+# Don't try gcc -ansi; that turns off useful extensions and
+# breaks some systems' header files.
+# AIX			-qlanglvl=ansi
+# Ultrix and OSF/1	-std1
+# HP-UX 10.20 and later	-Ae
+# HP-UX older versions	-Aa -D_HPUX_SOURCE
+# SVR4			-Xc -D__EXTENSIONS__
+for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_prog_cc_stdc=$ac_arg
+break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext
+done
+rm -f conftest.$ac_ext conftest.$ac_objext
+CC=$ac_save_CC
+
+fi
+
+case "x$ac_cv_prog_cc_stdc" in
+  x|xno)
+    echo "$as_me:$LINENO: result: none needed" >&5
+echo "${ECHO_T}none needed" >&6 ;;
+  *)
+    echo "$as_me:$LINENO: result: $ac_cv_prog_cc_stdc" >&5
+echo "${ECHO_T}$ac_cv_prog_cc_stdc" >&6
+    CC="$CC $ac_cv_prog_cc_stdc" ;;
+esac
+
+# Some people use a C++ compiler to compile C.  Since we use `exit',
+# in C++ we need to declare it.  In case someone uses the same compiler
+# for both compiling C and C++ we need to have the C++ compiler decide
+# the declaration of exit, since it's the most demanding environment.
+cat >conftest.$ac_ext <<_ACEOF
+#ifndef __cplusplus
+  choke me
+#endif
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  for ac_declaration in \
+   ''\
+   '#include <stdlib.h>' \
+   'extern "C" void std::exit (int) throw (); using std::exit;' \
+   'extern "C" void std::exit (int); using std::exit;' \
+   'extern "C" void exit (int) throw ();' \
+   'extern "C" void exit (int);' \
+   'void exit (int);'
+do
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+$ac_declaration
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+continue
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_declaration
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+done
+rm -f conftest*
+if test -n "$ac_declaration"; then
+  echo '#ifdef __cplusplus' >>confdefs.h
+  echo $ac_declaration      >>confdefs.h
+  echo '#endif'             >>confdefs.h
+fi
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ac_aux_dir=
+for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
+  if test -f $ac_dir/install-sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f $ac_dir/install.sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  elif test -f $ac_dir/shtool; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/shtool install -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  { { echo "$as_me:$LINENO: error: cannot find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." >&5
+echo "$as_me: error: cannot find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+ac_config_guess="$SHELL $ac_aux_dir/config.guess"
+ac_config_sub="$SHELL $ac_aux_dir/config.sub"
+ac_configure="$SHELL $ac_aux_dir/configure" # This should be Cygnus configure.
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# ./install, which can be erroneously created by make from ./install.sh.
+echo "$as_me:$LINENO: checking for a BSD-compatible install" >&5
+echo $ECHO_N "checking for a BSD-compatible install... $ECHO_C" >&6
+if test -z "$INSTALL"; then
+if test "${ac_cv_path_install+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in
+  ./ | .// | /cC/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+        if $as_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+          if test $ac_prog = install &&
+            grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+            # AIX install.  It has an incompatible calling convention.
+            :
+          elif test $ac_prog = install &&
+            grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+            # program-specific install script used by HP pwplus--don't use.
+            :
+          else
+            ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+            break 3
+          fi
+        fi
+      done
+    done
+    ;;
+esac
+done
+
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  We don't cache a
+    # path for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the path is relative.
+    INSTALL=$ac_install_sh
+  fi
+fi
+echo "$as_me:$LINENO: result: $INSTALL" >&5
+echo "${ECHO_T}$INSTALL" >&6
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+
+# Check whether --enable-shared or --disable-shared was given.
+if test "${enable_shared+set}" = set; then
+  enableval="$enable_shared"
+  p=${PACKAGE-default}
+case $enableval in
+yes) enable_shared=yes ;;
+no) enable_shared=no ;;
+*)
+  enable_shared=no
+  # Look at the argument we got.  We use all the common list separators.
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+  for pkg in $enableval; do
+    if test "X$pkg" = "X$p"; then
+      enable_shared=yes
+    fi
+  done
+  IFS="$ac_save_ifs"
+  ;;
+esac
+else
+  enable_shared=yes
+fi;
+# Check whether --enable-static or --disable-static was given.
+if test "${enable_static+set}" = set; then
+  enableval="$enable_static"
+  p=${PACKAGE-default}
+case $enableval in
+yes) enable_static=yes ;;
+no) enable_static=no ;;
+*)
+  enable_static=no
+  # Look at the argument we got.  We use all the common list separators.
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+  for pkg in $enableval; do
+    if test "X$pkg" = "X$p"; then
+      enable_static=yes
+    fi
+  done
+  IFS="$ac_save_ifs"
+  ;;
+esac
+else
+  enable_static=yes
+fi;
+# Check whether --enable-fast-install or --disable-fast-install was given.
+if test "${enable_fast_install+set}" = set; then
+  enableval="$enable_fast_install"
+  p=${PACKAGE-default}
+case $enableval in
+yes) enable_fast_install=yes ;;
+no) enable_fast_install=no ;;
+*)
+  enable_fast_install=no
+  # Look at the argument we got.  We use all the common list separators.
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+  for pkg in $enableval; do
+    if test "X$pkg" = "X$p"; then
+      enable_fast_install=yes
+    fi
+  done
+  IFS="$ac_save_ifs"
+  ;;
+esac
+else
+  enable_fast_install=yes
+fi;
+# Make sure we can run config.sub.
+$ac_config_sub sun4 >/dev/null 2>&1 ||
+  { { echo "$as_me:$LINENO: error: cannot run $ac_config_sub" >&5
+echo "$as_me: error: cannot run $ac_config_sub" >&2;}
+   { (exit 1); exit 1; }; }
+
+echo "$as_me:$LINENO: checking build system type" >&5
+echo $ECHO_N "checking build system type... $ECHO_C" >&6
+if test "${ac_cv_build+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_build_alias=$build_alias
+test -z "$ac_cv_build_alias" &&
+  ac_cv_build_alias=`$ac_config_guess`
+test -z "$ac_cv_build_alias" &&
+  { { echo "$as_me:$LINENO: error: cannot guess build type; you must specify one" >&5
+echo "$as_me: error: cannot guess build type; you must specify one" >&2;}
+   { (exit 1); exit 1; }; }
+ac_cv_build=`$ac_config_sub $ac_cv_build_alias` ||
+  { { echo "$as_me:$LINENO: error: $ac_config_sub $ac_cv_build_alias failed" >&5
+echo "$as_me: error: $ac_config_sub $ac_cv_build_alias failed" >&2;}
+   { (exit 1); exit 1; }; }
+
+fi
+echo "$as_me:$LINENO: result: $ac_cv_build" >&5
+echo "${ECHO_T}$ac_cv_build" >&6
+build=$ac_cv_build
+build_cpu=`echo $ac_cv_build | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
+build_vendor=`echo $ac_cv_build | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
+build_os=`echo $ac_cv_build | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
+
+
+echo "$as_me:$LINENO: checking host system type" >&5
+echo $ECHO_N "checking host system type... $ECHO_C" >&6
+if test "${ac_cv_host+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_host_alias=$host_alias
+test -z "$ac_cv_host_alias" &&
+  ac_cv_host_alias=$ac_cv_build_alias
+ac_cv_host=`$ac_config_sub $ac_cv_host_alias` ||
+  { { echo "$as_me:$LINENO: error: $ac_config_sub $ac_cv_host_alias failed" >&5
+echo "$as_me: error: $ac_config_sub $ac_cv_host_alias failed" >&2;}
+   { (exit 1); exit 1; }; }
+
+fi
+echo "$as_me:$LINENO: result: $ac_cv_host" >&5
+echo "${ECHO_T}$ac_cv_host" >&6
+host=$ac_cv_host
+host_cpu=`echo $ac_cv_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
+host_vendor=`echo $ac_cv_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
+host_os=`echo $ac_cv_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
+
+
+
+# Check whether --with-gnu-ld or --without-gnu-ld was given.
+if test "${with_gnu_ld+set}" = set; then
+  withval="$with_gnu_ld"
+  test "$withval" = no || with_gnu_ld=yes
+else
+  with_gnu_ld=no
+fi;
+ac_prog=ld
+if test "$GCC" = yes; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  echo "$as_me:$LINENO: checking for ld used by GCC" >&5
+echo $ECHO_N "checking for ld used by GCC... $ECHO_C" >&6
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [\\/]* | [A-Za-z]:[\\/]*)
+      re_direlt='/[^/][^/]*/\.\./'
+      # Canonicalize the path of ld
+      ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
+      while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD="$ac_prog"
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test "$with_gnu_ld" = yes; then
+  echo "$as_me:$LINENO: checking for GNU ld" >&5
+echo $ECHO_N "checking for GNU ld... $ECHO_C" >&6
+else
+  echo "$as_me:$LINENO: checking for non-GNU ld" >&5
+echo $ECHO_N "checking for non-GNU ld... $ECHO_C" >&6
+fi
+if test "${lt_cv_path_LD+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -z "$LD"; then
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD="$ac_dir/$ac_prog"
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some GNU ld's only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      if "$lt_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
+	test "$with_gnu_ld" != no && break
+      else
+	test "$with_gnu_ld" != yes && break
+      fi
+    fi
+  done
+  IFS="$ac_save_ifs"
+else
+  lt_cv_path_LD="$LD" # Let the user override the test with a path.
+fi
+fi
+
+LD="$lt_cv_path_LD"
+if test -n "$LD"; then
+  echo "$as_me:$LINENO: result: $LD" >&5
+echo "${ECHO_T}$LD" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+test -z "$LD" && { { echo "$as_me:$LINENO: error: no acceptable ld found in \$PATH" >&5
+echo "$as_me: error: no acceptable ld found in \$PATH" >&2;}
+   { (exit 1); exit 1; }; }
+echo "$as_me:$LINENO: checking if the linker ($LD) is GNU ld" >&5
+echo $ECHO_N "checking if the linker ($LD) is GNU ld... $ECHO_C" >&6
+if test "${lt_cv_prog_gnu_ld+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  # I'd rather use --version here, but apparently some GNU ld's only accept -v.
+if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
+  lt_cv_prog_gnu_ld=yes
+else
+  lt_cv_prog_gnu_ld=no
+fi
+fi
+echo "$as_me:$LINENO: result: $lt_cv_prog_gnu_ld" >&5
+echo "${ECHO_T}$lt_cv_prog_gnu_ld" >&6
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+
+echo "$as_me:$LINENO: checking for $LD option to reload object files" >&5
+echo $ECHO_N "checking for $LD option to reload object files... $ECHO_C" >&6
+if test "${lt_cv_ld_reload_flag+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  lt_cv_ld_reload_flag='-r'
+fi
+echo "$as_me:$LINENO: result: $lt_cv_ld_reload_flag" >&5
+echo "${ECHO_T}$lt_cv_ld_reload_flag" >&6
+reload_flag=$lt_cv_ld_reload_flag
+test -n "$reload_flag" && reload_flag=" $reload_flag"
+
+echo "$as_me:$LINENO: checking for BSD-compatible nm" >&5
+echo $ECHO_N "checking for BSD-compatible nm... $ECHO_C" >&6
+if test "${lt_cv_path_NM+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$NM"; then
+  # Let the user override the test.
+  lt_cv_path_NM="$NM"
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
+  for ac_dir in $PATH /usr/ccs/bin /usr/ucb /bin; do
+    test -z "$ac_dir" && ac_dir=.
+    tmp_nm=$ac_dir/${ac_tool_prefix}nm
+    if test -f $tmp_nm || test -f $tmp_nm$ac_exeext ; then
+      # Check to see if the nm accepts a BSD-compat flag.
+      # Adding the `sed 1q' prevents false positives on HP-UX, which says:
+      #   nm: unknown option "B" ignored
+      # Tru64's nm complains that /dev/null is an invalid object file
+      if ($tmp_nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep '(/dev/null|Invalid file or object type)' >/dev/null; then
+	lt_cv_path_NM="$tmp_nm -B"
+	break
+      elif ($tmp_nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
+	lt_cv_path_NM="$tmp_nm -p"
+	break
+      else
+	lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
+	continue # so that we can try to find one that supports BSD flags
+      fi
+    fi
+  done
+  IFS="$ac_save_ifs"
+  test -z "$lt_cv_path_NM" && lt_cv_path_NM=nm
+fi
+fi
+
+NM="$lt_cv_path_NM"
+echo "$as_me:$LINENO: result: $NM" >&5
+echo "${ECHO_T}$NM" >&6
+
+echo "$as_me:$LINENO: checking whether ln -s works" >&5
+echo $ECHO_N "checking whether ln -s works... $ECHO_C" >&6
+LN_S=$as_ln_s
+if test "$LN_S" = "ln -s"; then
+  echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+else
+  echo "$as_me:$LINENO: result: no, using $LN_S" >&5
+echo "${ECHO_T}no, using $LN_S" >&6
+fi
+
+echo "$as_me:$LINENO: checking how to recognise dependant libraries" >&5
+echo $ECHO_N "checking how to recognise dependant libraries... $ECHO_C" >&6
+if test "${lt_cv_deplibs_check_method+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  lt_cv_file_magic_cmd='$MAGIC_CMD'
+lt_cv_file_magic_test_file=
+lt_cv_deplibs_check_method='unknown'
+# Need to set the preceding variable on all platforms that support
+# interlibrary dependencies.
+# 'none' -- dependencies not supported.
+# `unknown' -- same as none, but documents that we really don't know.
+# 'pass_all' -- all dependencies passed with no checks.
+# 'test_compile' -- check by making test program.
+# ['file_magic [regex]'] -- check by looking for files in library path
+# which responds to the $file_magic_cmd with a given egrep regex.
+# If you have `file' or equivalent on your system and you're not sure
+# whether `pass_all' will *always* work, you probably want this one.
+
+case $host_os in
+aix4* | aix5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+beos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+bsdi4*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  ;;
+
+cygwin* | mingw* | pw32*)
+  lt_cv_deplibs_check_method='file_magic file format pei*-i386(.*architecture: i386)?'
+  lt_cv_file_magic_cmd='$OBJDUMP -f'
+  ;;
+
+darwin* | rhapsody*)
+  lt_cv_deplibs_check_method='file_magic Mach-O dynamically linked shared library'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  case "$host_os" in
+  rhapsody* | darwin1.012)
+    lt_cv_file_magic_test_file=`echo /System/Library/Frameworks/System.framework/Versions/*/System | head -1`
+    ;;
+  *) # Darwin 1.3 on
+    lt_cv_file_magic_test_file='/usr/lib/libSystem.dylib'
+    ;;
+  esac
+  ;;
+
+freebsd*)
+  if echo __ELF__ | $CC -E - | grep __ELF__ > /dev/null; then
+    case $host_cpu in
+    i*86 )
+      # Not sure whether the presence of OpenBSD here was a mistake.
+      # Let's accept both of them until this is cleared up.
+      lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD)/i[3-9]86 (compact )?demand paged shared library'
+      lt_cv_file_magic_cmd=/usr/bin/file
+      lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*`
+      ;;
+    esac
+  else
+    lt_cv_deplibs_check_method=pass_all
+  fi
+  ;;
+
+gnu*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+hpux10.20*|hpux11*)
+  lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9].[0-9]) shared library'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libc.sl
+  ;;
+
+irix5* | irix6*)
+  case $host_os in
+  irix5*)
+    # this will be overridden with pass_all, but let us keep it just in case
+    lt_cv_deplibs_check_method="file_magic ELF 32-bit MSB dynamic lib MIPS - version 1"
+    ;;
+  *)
+    case $LD in
+    *-32|*"-32 ") libmagic=32-bit;;
+    *-n32|*"-n32 ") libmagic=N32;;
+    *-64|*"-64 ") libmagic=64-bit;;
+    *) libmagic=never-match;;
+    esac
+    # this will be overridden with pass_all, but let us keep it just in case
+    lt_cv_deplibs_check_method="file_magic ELF ${libmagic} MSB mips-[1234] dynamic lib MIPS - version 1"
+    ;;
+  esac
+  lt_cv_file_magic_test_file=`echo /lib${libsuff}/libc.so*`
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+# This must be Linux ELF.
+linux-gnu*)
+  case $host_cpu in
+  alpha* | i*86 | powerpc* | sparc* | ia64* )
+    lt_cv_deplibs_check_method=pass_all ;;
+  *)
+    # glibc up to 2.1.1 does not perform some relocations on ARM
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )' ;;
+  esac
+  lt_cv_file_magic_test_file=`echo /lib/libc.so* /lib/libc-*.so`
+  ;;
+
+netbsd*)
+  if echo __ELF__ | $CC -E - | grep __ELF__ > /dev/null; then
+    lt_cv_deplibs_check_method='match_pattern /lib[^/\.]+\.so\.[0-9]+\.[0-9]+$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[^/\.]+\.so$'
+  fi
+  ;;
+
+newos6*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libnls.so
+  ;;
+
+osf3* | osf4* | osf5*)
+  # this will be overridden with pass_all, but let us keep it just in case
+  lt_cv_deplibs_check_method='file_magic COFF format alpha shared library'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sco3.2v5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+solaris*)
+  lt_cv_deplibs_check_method=pass_all
+  lt_cv_file_magic_test_file=/lib/libc.so
+  ;;
+
+sysv5uw[78]* | sysv4*uw2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+  case $host_vendor in
+  motorola)
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]'
+    lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*`
+    ;;
+  ncr)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  sequent)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )'
+    ;;
+  sni)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib"
+    lt_cv_file_magic_test_file=/lib/libc.so
+    ;;
+  esac
+  ;;
+esac
+
+fi
+echo "$as_me:$LINENO: result: $lt_cv_deplibs_check_method" >&5
+echo "${ECHO_T}$lt_cv_deplibs_check_method" >&6
+file_magic_cmd=$lt_cv_file_magic_cmd
+deplibs_check_method=$lt_cv_deplibs_check_method
+
+
+
+
+
+
+
+
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+echo "$as_me:$LINENO: checking command to parse $NM output" >&5
+echo $ECHO_N "checking command to parse $NM output... $ECHO_C" >&6
+if test "${lt_cv_sys_global_symbol_pipe+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+# These are sane defaults that work on at least a few old systems.
+# [They come from Ultrix.  What could be older than Ultrix?!! ;)]
+
+# Character class describing NM global symbol codes.
+symcode='[BCDEGRST]'
+
+# Regexp to match symbols that can be accessed directly from C.
+sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
+
+# Transform the above into a raw symbol and a C symbol.
+symxfrm='\1 \2\3 \3'
+
+# Transform an extracted symbol line into a proper C declaration
+lt_cv_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'"
+
+# Define system-specific variables.
+case $host_os in
+aix*)
+  symcode='[BCDT]'
+  ;;
+cygwin* | mingw* | pw32*)
+  symcode='[ABCDGISTW]'
+  ;;
+hpux*) # Its linker distinguishes data from code symbols
+  lt_cv_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'"
+  ;;
+irix*)
+  symcode='[BCDEGRST]'
+  ;;
+solaris* | sysv5*)
+  symcode='[BDT]'
+  ;;
+sysv4)
+  symcode='[DFNSTU]'
+  ;;
+esac
+
+# Handle CRLF in mingw tool chain
+opt_cr=
+case $host_os in
+mingw*)
+  opt_cr=`echo 'x\{0,1\}' | tr x '\015'` # option cr in regexp
+  ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
+  symcode='[ABCDGISTW]'
+fi
+
+# Try without a prefix undercore, then with it.
+for ac_symprfx in "" "_"; do
+
+  # Write the raw and C identifiers.
+lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ 	]\($symcode$symcode*\)[ 	][ 	]*\($ac_symprfx\)$sympat$opt_cr$/$symxfrm/p'"
+
+  # Check to see that the pipe works correctly.
+  pipe_works=no
+  rm -f conftest*
+  cat > conftest.$ac_ext <<EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func();return(0);}
+EOF
+
+  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+    # Now try to grab the symbols.
+    nlist=conftest.nm
+    if { (eval echo "$as_me:$LINENO: \"$NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist\"") >&5
+  (eval $NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && test -s "$nlist"; then
+      # Try sorting and uniquifying the output.
+      if sort "$nlist" | uniq > "$nlist"T; then
+	mv -f "$nlist"T "$nlist"
+      else
+	rm -f "$nlist"T
+      fi
+
+      # Make sure that we snagged all the symbols we need.
+      if egrep ' nm_test_var$' "$nlist" >/dev/null; then
+	if egrep ' nm_test_func$' "$nlist" >/dev/null; then
+	  cat <<EOF > conftest.$ac_ext
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+EOF
+	  # Now generate the symbol file.
+	  eval "$lt_cv_global_symbol_to_cdecl"' < "$nlist" >> conftest.$ac_ext'
+
+	  cat <<EOF >> conftest.$ac_ext
+#if defined (__STDC__) && __STDC__
+# define lt_ptr_t void *
+#else
+# define lt_ptr_t char *
+# define const
+#endif
+
+/* The mapping between symbol names and symbols. */
+const struct {
+  const char *name;
+  lt_ptr_t address;
+}
+lt_preloaded_symbols[] =
+{
+EOF
+	  sed "s/^$symcode$symcode* \(.*\) \(.*\)$/  {\"\2\", (lt_ptr_t) \&\2},/" < "$nlist" >> conftest.$ac_ext
+	  cat <<\EOF >> conftest.$ac_ext
+  {0, (lt_ptr_t) 0}
+};
+
+#ifdef __cplusplus
+}
+#endif
+EOF
+	  # Now try linking the two files.
+	  mv conftest.$ac_objext conftstm.$ac_objext
+	  save_LIBS="$LIBS"
+	  save_CFLAGS="$CFLAGS"
+	  LIBS="conftstm.$ac_objext"
+	  CFLAGS="$CFLAGS$no_builtin_flag"
+	  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && test -s conftest; then
+	    pipe_works=yes
+	  fi
+	  LIBS="$save_LIBS"
+	  CFLAGS="$save_CFLAGS"
+	else
+	  echo "cannot find nm_test_func in $nlist" >&5
+	fi
+      else
+	echo "cannot find nm_test_var in $nlist" >&5
+      fi
+    else
+      echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5
+    fi
+  else
+    echo "$progname: failed program was:" >&5
+    cat conftest.$ac_ext >&5
+  fi
+  rm -f conftest* conftst*
+
+  # Do not use the global_symbol_pipe unless it works.
+  if test "$pipe_works" = yes; then
+    break
+  else
+    lt_cv_sys_global_symbol_pipe=
+  fi
+done
+
+fi
+
+global_symbol_pipe="$lt_cv_sys_global_symbol_pipe"
+if test -z "$lt_cv_sys_global_symbol_pipe"; then
+  global_symbol_to_cdecl=
+else
+  global_symbol_to_cdecl="$lt_cv_global_symbol_to_cdecl"
+fi
+if test -z "$global_symbol_pipe$global_symbol_to_cdecl"; then
+  echo "$as_me:$LINENO: result: failed" >&5
+echo "${ECHO_T}failed" >&6
+else
+  echo "$as_me:$LINENO: result: ok" >&5
+echo "${ECHO_T}ok" >&6
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+echo "$as_me:$LINENO: checking how to run the C preprocessor" >&5
+echo $ECHO_N "checking how to run the C preprocessor... $ECHO_C" >&6
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if test "${ac_cv_prog_CPP+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+      # Double quotes because CPP needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+                     Syntax error
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether non-existent headers
+  # can be detected and how.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  # Broken: success on invalid input.
+continue
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then
+  break
+fi
+
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
+else
+  ac_cv_prog_CPP=$CPP
+fi
+echo "$as_me:$LINENO: result: $CPP" >&5
+echo "${ECHO_T}$CPP" >&6
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+                     Syntax error
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether non-existent headers
+  # can be detected and how.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  # Broken: success on invalid input.
+continue
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then
+  :
+else
+  { { echo "$as_me:$LINENO: error: C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details." >&5
+echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+echo "$as_me:$LINENO: checking for egrep" >&5
+echo $ECHO_N "checking for egrep... $ECHO_C" >&6
+if test "${ac_cv_prog_egrep+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if echo a | (grep -E '(a|b)') >/dev/null 2>&1
+    then ac_cv_prog_egrep='grep -E'
+    else ac_cv_prog_egrep='egrep'
+    fi
+fi
+echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5
+echo "${ECHO_T}$ac_cv_prog_egrep" >&6
+ EGREP=$ac_cv_prog_egrep
+
+
+echo "$as_me:$LINENO: checking for ANSI C header files" >&5
+echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
+if test "${ac_cv_header_stdc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_header_stdc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_header_stdc=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then
+  :
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ctype.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+                   (('a' <= (c) && (c) <= 'i') \
+                     || ('j' <= (c) && (c) <= 'r') \
+                     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+        || toupper (i) != TOUPPER (i))
+      exit(2);
+  exit (0);
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+ac_cv_header_stdc=no
+fi
+rm -f core core.* *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
+echo "${ECHO_T}$ac_cv_header_stdc" >&6
+if test $ac_cv_header_stdc = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define STDC_HEADERS 1
+_ACEOF
+
+fi
+
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+
+
+
+
+
+
+
+
+
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+                  inttypes.h stdint.h unistd.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_Header=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+eval "$as_ac_Header=no"
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
+for ac_header in dlfcn.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
+
+
+# Only perform the check for file, if the check method requires it
+case $deplibs_check_method in
+file_magic*)
+  if test "$file_magic_cmd" = '$MAGIC_CMD'; then
+    echo "$as_me:$LINENO: checking for ${ac_tool_prefix}file" >&5
+echo $ECHO_N "checking for ${ac_tool_prefix}file... $ECHO_C" >&6
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $MAGIC_CMD in
+  /*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path.
+  ;;
+  ?:/*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a dos path.
+  ;;
+  *)
+  ac_save_MAGIC_CMD="$MAGIC_CMD"
+  IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS=":"
+  ac_dummy="/usr/bin:$PATH"
+  for ac_dir in $ac_dummy; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/${ac_tool_prefix}file; then
+      lt_cv_path_MAGIC_CMD="$ac_dir/${ac_tool_prefix}file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex="`expr \"$deplibs_check_method\" : \"file_magic \(.*\)\"`"
+	  MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    egrep "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+  MAGIC_CMD="$ac_save_MAGIC_CMD"
+  ;;
+esac
+fi
+
+MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+if test -n "$MAGIC_CMD"; then
+  echo "$as_me:$LINENO: result: $MAGIC_CMD" >&5
+echo "${ECHO_T}$MAGIC_CMD" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+if test -z "$lt_cv_path_MAGIC_CMD"; then
+  if test -n "$ac_tool_prefix"; then
+    echo "$as_me:$LINENO: checking for file" >&5
+echo $ECHO_N "checking for file... $ECHO_C" >&6
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $MAGIC_CMD in
+  /*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path.
+  ;;
+  ?:/*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a dos path.
+  ;;
+  *)
+  ac_save_MAGIC_CMD="$MAGIC_CMD"
+  IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS=":"
+  ac_dummy="/usr/bin:$PATH"
+  for ac_dir in $ac_dummy; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/file; then
+      lt_cv_path_MAGIC_CMD="$ac_dir/file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex="`expr \"$deplibs_check_method\" : \"file_magic \(.*\)\"`"
+	  MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    egrep "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+  MAGIC_CMD="$ac_save_MAGIC_CMD"
+  ;;
+esac
+fi
+
+MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+if test -n "$MAGIC_CMD"; then
+  echo "$as_me:$LINENO: result: $MAGIC_CMD" >&5
+echo "${ECHO_T}$MAGIC_CMD" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  else
+    MAGIC_CMD=:
+  fi
+fi
+
+  fi
+  ;;
+esac
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_RANLIB+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  echo "$as_me:$LINENO: result: $RANLIB" >&5
+echo "${ECHO_T}$RANLIB" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  test -z "$ac_cv_prog_ac_ct_RANLIB" && ac_cv_prog_ac_ct_RANLIB=":"
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  echo "$as_me:$LINENO: result: $ac_ct_RANLIB" >&5
+echo "${ECHO_T}$ac_ct_RANLIB" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  RANLIB=$ac_ct_RANLIB
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_STRIP+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  echo "$as_me:$LINENO: result: $STRIP" >&5
+echo "${ECHO_T}$STRIP" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  test -z "$ac_cv_prog_ac_ct_STRIP" && ac_cv_prog_ac_ct_STRIP=":"
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  echo "$as_me:$LINENO: result: $ac_ct_STRIP" >&5
+echo "${ECHO_T}$ac_ct_STRIP" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  STRIP=$ac_ct_STRIP
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+
+enable_dlopen=no
+enable_win32_dll=no
+
+# Check whether --enable-libtool-lock or --disable-libtool-lock was given.
+if test "${enable_libtool_lock+set}" = set; then
+  enableval="$enable_libtool_lock"
+
+fi;
+test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
+
+# Some flags need to be propagated to the compiler or linker for good
+# libtool support.
+case $host in
+*-*-irix6*)
+  # Find out which ABI we are using.
+  echo '#line 4014 "configure"' > conftest.$ac_ext
+  if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+    case `/usr/bin/file conftest.$ac_objext` in
+    *32-bit*)
+      LD="${LD-ld} -32"
+      ;;
+    *N32*)
+      LD="${LD-ld} -n32"
+      ;;
+    *64-bit*)
+      LD="${LD-ld} -64"
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+*-*-sco3.2v5*)
+  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
+  SAVE_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -belf"
+  echo "$as_me:$LINENO: checking whether the C compiler needs -belf" >&5
+echo $ECHO_N "checking whether the C compiler needs -belf... $ECHO_C" >&6
+if test "${lt_cv_cc_needs_belf+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+
+     ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+     cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  lt_cv_cc_needs_belf=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+lt_cv_cc_needs_belf=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+     ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+fi
+echo "$as_me:$LINENO: result: $lt_cv_cc_needs_belf" >&5
+echo "${ECHO_T}$lt_cv_cc_needs_belf" >&6
+  if test x"$lt_cv_cc_needs_belf" != x"yes"; then
+    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
+    CFLAGS="$SAVE_CFLAGS"
+  fi
+  ;;
+
+
+esac
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+Xsed='sed -e s/^X//'
+sed_quote_subst='s/\([\\"\\`$\\\\]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\([\\"\\`\\\\]\)/\\\1/g'
+
+# Sed substitution to delay expansion of an escaped shell variable in a
+# double_quote_subst'ed string.
+delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g'
+
+# Constants:
+rm="rm -f"
+
+# Global variables:
+default_ofile=libtool
+can_build_shared=yes
+
+# All known linkers require a `.a' archive for static linking (except M$VC,
+# which needs '.lib').
+libext=a
+ltmain="$ac_aux_dir/ltmain.sh"
+ofile="$default_ofile"
+with_gnu_ld="$lt_cv_prog_gnu_ld"
+need_locks="$enable_libtool_lock"
+
+old_CC="$CC"
+old_CFLAGS="$CFLAGS"
+
+# Set sane defaults for various variables
+test -z "$AR" && AR=ar
+test -z "$AR_FLAGS" && AR_FLAGS=cru
+test -z "$AS" && AS=as
+test -z "$CC" && CC=cc
+test -z "$DLLTOOL" && DLLTOOL=dlltool
+test -z "$LD" && LD=ld
+test -z "$LN_S" && LN_S="ln -s"
+test -z "$MAGIC_CMD" && MAGIC_CMD=file
+test -z "$NM" && NM=nm
+test -z "$OBJDUMP" && OBJDUMP=objdump
+test -z "$RANLIB" && RANLIB=:
+test -z "$STRIP" && STRIP=:
+test -z "$ac_objext" && ac_objext=o
+
+if test x"$host" != x"$build"; then
+  ac_tool_prefix=${host_alias}-
+else
+  ac_tool_prefix=
+fi
+
+# Transform linux* to *-*-linux-gnu*, to support old configure scripts.
+case $host_os in
+linux-gnu*) ;;
+linux*) host=`echo $host | sed 's/^\(.*-.*-linux\)\(.*\)$/\1-gnu\2/'`
+esac
+
+case $host_os in
+aix3*)
+  # AIX sometimes has problems with the GCC collect2 program.  For some
+  # reason, if we set the COLLECT_NAMES environment variable, the problems
+  # vanish in a puff of smoke.
+  if test "X${COLLECT_NAMES+set}" != Xset; then
+    COLLECT_NAMES=
+    export COLLECT_NAMES
+  fi
+  ;;
+esac
+
+# Determine commands to create old-style static archives.
+old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs$old_deplibs'
+old_postinstall_cmds='chmod 644 $oldlib'
+old_postuninstall_cmds=
+
+if test -n "$RANLIB"; then
+  old_archive_cmds="$old_archive_cmds~\$RANLIB \$oldlib"
+  old_postinstall_cmds="\$RANLIB \$oldlib~$old_postinstall_cmds"
+fi
+
+# Allow CC to be a program name with arguments.
+set dummy $CC
+compiler="$2"
+
+## FIXME: this should be a separate macro
+##
+echo "$as_me:$LINENO: checking for objdir" >&5
+echo $ECHO_N "checking for objdir... $ECHO_C" >&6
+rm -f .libs 2>/dev/null
+mkdir .libs 2>/dev/null
+if test -d .libs; then
+  objdir=.libs
+else
+  # MS-DOS does not allow filenames that begin with a dot.
+  objdir=_libs
+fi
+rmdir .libs 2>/dev/null
+echo "$as_me:$LINENO: result: $objdir" >&5
+echo "${ECHO_T}$objdir" >&6
+##
+## END FIXME
+
+
+## FIXME: this should be a separate macro
+##
+
+# Check whether --with-pic or --without-pic was given.
+if test "${with_pic+set}" = set; then
+  withval="$with_pic"
+  pic_mode="$withval"
+else
+  pic_mode=default
+fi;
+test -z "$pic_mode" && pic_mode=default
+
+# We assume here that the value for lt_cv_prog_cc_pic will not be cached
+# in isolation, and that seeing it set (from the cache) indicates that
+# the associated values are set (in the cache) correctly too.
+echo "$as_me:$LINENO: checking for $compiler option to produce PIC" >&5
+echo $ECHO_N "checking for $compiler option to produce PIC... $ECHO_C" >&6
+if test "${lt_cv_prog_cc_pic+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+   lt_cv_prog_cc_pic=
+  lt_cv_prog_cc_shlib=
+  lt_cv_prog_cc_wl=
+  lt_cv_prog_cc_static=
+  lt_cv_prog_cc_no_builtin=
+  lt_cv_prog_cc_can_build_shared=$can_build_shared
+
+  if test "$GCC" = yes; then
+    lt_cv_prog_cc_wl='-Wl,'
+    lt_cv_prog_cc_static='-static'
+
+    case $host_os in
+    aix*)
+      # Below there is a dirty hack to force normal static linking with -ldl
+      # The problem is because libdl dynamically linked with both libc and
+      # libC (AIX C++ library), which obviously doesn't included in libraries
+      # list by gcc. This cause undefined symbols with -static flags.
+      # This hack allows C programs to be linked with "-static -ldl", but
+      # we not sure about C++ programs.
+      lt_cv_prog_cc_static="$lt_cv_prog_cc_static ${lt_cv_prog_cc_wl}-lC"
+      ;;
+    amigaos*)
+      # FIXME: we need at least 68020 code to build shared libraries, but
+      # adding the `-m68020' flag to GCC prevents building anything better,
+      # like `-m68040'.
+      lt_cv_prog_cc_pic='-m68020 -resident32 -malways-restore-a4'
+      ;;
+    beos* | irix5* | irix6* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      lt_cv_prog_cc_pic='-fno-common'
+      ;;
+    cygwin* | mingw* | pw32* | os2*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      lt_cv_prog_cc_pic='-DDLL_EXPORT'
+      ;;
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	 lt_cv_prog_cc_pic=-Kconform_pic
+      fi
+      ;;
+    *)
+      lt_cv_prog_cc_pic='-fPIC'
+      ;;
+    esac
+  else
+    # PORTME Check for PIC flags for the system compiler.
+    case $host_os in
+    aix3* | aix4* | aix5*)
+      # All AIX code is PIC.
+      if test "$host_cpu" = ia64; then
+        # AIX 5 now supports IA64 processor
+        lt_cv_prog_cc_static='-Bstatic'
+        lt_cv_prog_cc_wl='-Wl,'
+      else
+        lt_cv_prog_cc_static='-bnso -bI:/lib/syscalls.exp'
+      fi
+      ;;
+
+    hpux9* | hpux10* | hpux11*)
+      # Is there a better lt_cv_prog_cc_static that works with the bundled CC?
+      lt_cv_prog_cc_wl='-Wl,'
+      lt_cv_prog_cc_static="${lt_cv_prog_cc_wl}-a ${lt_cv_prog_cc_wl}archive"
+      lt_cv_prog_cc_pic='+Z'
+      ;;
+
+    irix5* | irix6*)
+      lt_cv_prog_cc_wl='-Wl,'
+      lt_cv_prog_cc_static='-non_shared'
+      # PIC (with -KPIC) is the default.
+      ;;
+
+    cygwin* | mingw* | pw32* | os2*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      lt_cv_prog_cc_pic='-DDLL_EXPORT'
+      ;;
+
+    newsos6)
+      lt_cv_prog_cc_pic='-KPIC'
+      lt_cv_prog_cc_static='-Bstatic'
+      ;;
+
+    osf3* | osf4* | osf5*)
+      # All OSF/1 code is PIC.
+      lt_cv_prog_cc_wl='-Wl,'
+      lt_cv_prog_cc_static='-non_shared'
+      ;;
+
+    sco3.2v5*)
+      lt_cv_prog_cc_pic='-Kpic'
+      lt_cv_prog_cc_static='-dn'
+      lt_cv_prog_cc_shlib='-belf'
+      ;;
+
+    solaris*)
+      lt_cv_prog_cc_pic='-KPIC'
+      lt_cv_prog_cc_static='-Bstatic'
+      lt_cv_prog_cc_wl='-Wl,'
+      ;;
+
+    sunos4*)
+      lt_cv_prog_cc_pic='-PIC'
+      lt_cv_prog_cc_static='-Bstatic'
+      lt_cv_prog_cc_wl='-Qoption ld '
+      ;;
+
+    sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+      lt_cv_prog_cc_pic='-KPIC'
+      lt_cv_prog_cc_static='-Bstatic'
+      if test "x$host_vendor" = xsni; then
+        lt_cv_prog_cc_wl='-LD'
+      else
+        lt_cv_prog_cc_wl='-Wl,'
+      fi
+      ;;
+
+    uts4*)
+      lt_cv_prog_cc_pic='-pic'
+      lt_cv_prog_cc_static='-Bstatic'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec ;then
+	lt_cv_prog_cc_pic='-Kconform_pic'
+	lt_cv_prog_cc_static='-Bstatic'
+      fi
+      ;;
+
+    *)
+      lt_cv_prog_cc_can_build_shared=no
+      ;;
+    esac
+  fi
+
+fi
+
+if test -z "$lt_cv_prog_cc_pic"; then
+  echo "$as_me:$LINENO: result: none" >&5
+echo "${ECHO_T}none" >&6
+else
+  echo "$as_me:$LINENO: result: $lt_cv_prog_cc_pic" >&5
+echo "${ECHO_T}$lt_cv_prog_cc_pic" >&6
+
+  # Check to make sure the pic_flag actually works.
+  echo "$as_me:$LINENO: checking if $compiler PIC flag $lt_cv_prog_cc_pic works" >&5
+echo $ECHO_N "checking if $compiler PIC flag $lt_cv_prog_cc_pic works... $ECHO_C" >&6
+  if test "${lt_cv_prog_cc_pic_works+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+      save_CFLAGS="$CFLAGS"
+    CFLAGS="$CFLAGS $lt_cv_prog_cc_pic -DPIC"
+    cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+        case $host_os in
+      hpux9* | hpux10* | hpux11*)
+	# On HP-UX, both CC and GCC only warn that PIC is supported... then
+	# they create non-PIC objects.  So, if there were any warnings, we
+	# assume that PIC is not supported.
+	if test -s conftest.err; then
+	  lt_cv_prog_cc_pic_works=no
+	else
+	  lt_cv_prog_cc_pic_works=yes
+	fi
+	;;
+      *)
+	lt_cv_prog_cc_pic_works=yes
+	;;
+      esac
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+      lt_cv_prog_cc_pic_works=no
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+    CFLAGS="$save_CFLAGS"
+
+fi
+
+
+  if test "X$lt_cv_prog_cc_pic_works" = Xno; then
+    lt_cv_prog_cc_pic=
+    lt_cv_prog_cc_can_build_shared=no
+  else
+    lt_cv_prog_cc_pic=" $lt_cv_prog_cc_pic"
+  fi
+
+  echo "$as_me:$LINENO: result: $lt_cv_prog_cc_pic_works" >&5
+echo "${ECHO_T}$lt_cv_prog_cc_pic_works" >&6
+fi
+##
+## END FIXME
+
+# Check for any special shared library compilation flags.
+if test -n "$lt_cv_prog_cc_shlib"; then
+  { echo "$as_me:$LINENO: WARNING: \`$CC' requires \`$lt_cv_prog_cc_shlib' to build shared libraries" >&5
+echo "$as_me: WARNING: \`$CC' requires \`$lt_cv_prog_cc_shlib' to build shared libraries" >&2;}
+  if echo "$old_CC $old_CFLAGS " | egrep -e "[ 	]$lt_cv_prog_cc_shlib[ 	]" >/dev/null; then :
+  else
+   { echo "$as_me:$LINENO: WARNING: add \`$lt_cv_prog_cc_shlib' to the CC or CFLAGS env variable and reconfigure" >&5
+echo "$as_me: WARNING: add \`$lt_cv_prog_cc_shlib' to the CC or CFLAGS env variable and reconfigure" >&2;}
+    lt_cv_prog_cc_can_build_shared=no
+  fi
+fi
+
+## FIXME: this should be a separate macro
+##
+echo "$as_me:$LINENO: checking if $compiler static flag $lt_cv_prog_cc_static works" >&5
+echo $ECHO_N "checking if $compiler static flag $lt_cv_prog_cc_static works... $ECHO_C" >&6
+if test "${lt_cv_prog_cc_static_works+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+    lt_cv_prog_cc_static_works=no
+  save_LDFLAGS="$LDFLAGS"
+  LDFLAGS="$LDFLAGS $lt_cv_prog_cc_static"
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  lt_cv_prog_cc_static_works=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+  LDFLAGS="$save_LDFLAGS"
+
+fi
+
+
+# Belt *and* braces to stop my trousers falling down:
+test "X$lt_cv_prog_cc_static_works" = Xno && lt_cv_prog_cc_static=
+echo "$as_me:$LINENO: result: $lt_cv_prog_cc_static_works" >&5
+echo "${ECHO_T}$lt_cv_prog_cc_static_works" >&6
+
+pic_flag="$lt_cv_prog_cc_pic"
+special_shlib_compile_flags="$lt_cv_prog_cc_shlib"
+wl="$lt_cv_prog_cc_wl"
+link_static_flag="$lt_cv_prog_cc_static"
+no_builtin_flag="$lt_cv_prog_cc_no_builtin"
+can_build_shared="$lt_cv_prog_cc_can_build_shared"
+##
+## END FIXME
+
+
+## FIXME: this should be a separate macro
+##
+# Check to see if options -o and -c are simultaneously supported by compiler
+echo "$as_me:$LINENO: checking if $compiler supports -c -o file.$ac_objext" >&5
+echo $ECHO_N "checking if $compiler supports -c -o file.$ac_objext... $ECHO_C" >&6
+if test "${lt_cv_compiler_c_o+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+$rm -r conftest 2>/dev/null
+mkdir conftest
+cd conftest
+echo "int some_variable = 0;" > conftest.$ac_ext
+mkdir out
+# According to Tom Tromey, Ian Lance Taylor reported there are C compilers
+# that will create temporary files in the current directory regardless of
+# the output directory.  Thus, making CWD read-only will cause this test
+# to fail, enabling locking or at least warning the user not to do parallel
+# builds.
+chmod -w .
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -o out/conftest2.$ac_objext"
+compiler_c_o=no
+if { (eval echo configure:4554: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>out/conftest.err; } && test -s out/conftest2.$ac_objext; then
+  # The compiler can only warn and ignore the option if not recognized
+  # So say no if there are warnings
+  if test -s out/conftest.err; then
+    lt_cv_compiler_c_o=no
+  else
+    lt_cv_compiler_c_o=yes
+  fi
+else
+  # Append any errors to the config.log.
+  cat out/conftest.err 1>&5
+  lt_cv_compiler_c_o=no
+fi
+CFLAGS="$save_CFLAGS"
+chmod u+w .
+$rm conftest* out/*
+rmdir out
+cd ..
+rmdir conftest
+$rm -r conftest 2>/dev/null
+
+fi
+
+compiler_c_o=$lt_cv_compiler_c_o
+echo "$as_me:$LINENO: result: $compiler_c_o" >&5
+echo "${ECHO_T}$compiler_c_o" >&6
+
+if test x"$compiler_c_o" = x"yes"; then
+  # Check to see if we can write to a .lo
+  echo "$as_me:$LINENO: checking if $compiler supports -c -o file.lo" >&5
+echo $ECHO_N "checking if $compiler supports -c -o file.lo... $ECHO_C" >&6
+  if test "${lt_cv_compiler_o_lo+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+  lt_cv_compiler_o_lo=no
+  save_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -c -o conftest.lo"
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+int some_variable = 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+      # The compiler can only warn and ignore the option if not recognized
+    # So say no if there are warnings
+    if test -s conftest.err; then
+      lt_cv_compiler_o_lo=no
+    else
+      lt_cv_compiler_o_lo=yes
+    fi
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$save_CFLAGS"
+
+fi
+
+  compiler_o_lo=$lt_cv_compiler_o_lo
+  echo "$as_me:$LINENO: result: $compiler_c_lo" >&5
+echo "${ECHO_T}$compiler_c_lo" >&6
+else
+  compiler_o_lo=no
+fi
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+# Check to see if we can do hard links to lock some files if needed
+hard_links="nottested"
+if test "$compiler_c_o" = no && test "$need_locks" != no; then
+  # do not overwrite the value of need_locks provided by the user
+  echo "$as_me:$LINENO: checking if we can lock with hard links" >&5
+echo $ECHO_N "checking if we can lock with hard links... $ECHO_C" >&6
+  hard_links=yes
+  $rm conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  echo "$as_me:$LINENO: result: $hard_links" >&5
+echo "${ECHO_T}$hard_links" >&6
+  if test "$hard_links" = no; then
+    { echo "$as_me:$LINENO: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&5
+echo "$as_me: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&2;}
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+if test "$GCC" = yes; then
+  # Check to see if options -fno-rtti -fno-exceptions are supported by compiler
+  echo "$as_me:$LINENO: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+echo $ECHO_N "checking if $compiler supports -fno-rtti -fno-exceptions... $ECHO_C" >&6
+  echo "int some_variable = 0;" > conftest.$ac_ext
+  save_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -fno-rtti -fno-exceptions -c conftest.$ac_ext"
+  compiler_rtti_exceptions=no
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+int some_variable = 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+      # The compiler can only warn and ignore the option if not recognized
+    # So say no if there are warnings
+    if test -s conftest.err; then
+      compiler_rtti_exceptions=no
+    else
+      compiler_rtti_exceptions=yes
+    fi
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$save_CFLAGS"
+  echo "$as_me:$LINENO: result: $compiler_rtti_exceptions" >&5
+echo "${ECHO_T}$compiler_rtti_exceptions" >&6
+
+  if test "$compiler_rtti_exceptions" = "yes"; then
+    no_builtin_flag=' -fno-builtin -fno-rtti -fno-exceptions'
+  else
+    no_builtin_flag=' -fno-builtin'
+  fi
+fi
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+# See if the linker supports building shared libraries.
+echo "$as_me:$LINENO: checking whether the linker ($LD) supports shared libraries" >&5
+echo $ECHO_N "checking whether the linker ($LD) supports shared libraries... $ECHO_C" >&6
+
+allow_undefined_flag=
+no_undefined_flag=
+need_lib_prefix=unknown
+need_version=unknown
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+archive_cmds=
+archive_expsym_cmds=
+old_archive_from_new_cmds=
+old_archive_from_expsyms_cmds=
+export_dynamic_flag_spec=
+whole_archive_flag_spec=
+thread_safe_flag_spec=
+hardcode_into_libs=no
+hardcode_libdir_flag_spec=
+hardcode_libdir_separator=
+hardcode_direct=no
+hardcode_minus_L=no
+hardcode_shlibpath_var=unsupported
+runpath_var=
+link_all_deplibs=unknown
+always_export_symbols=no
+export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | sed '\''s/.* //'\'' | sort | uniq > $export_symbols'
+# include_expsyms should be a list of space-separated symbols to be *always*
+# included in the symbol list
+include_expsyms=
+# exclude_expsyms can be an egrep regular expression of symbols to exclude
+# it will be wrapped by ` (' and `)$', so one must not match beginning or
+# end of line.  Example: `a|bc|.*d.*' will exclude the symbols `a' and `bc',
+# as well as any symbol that contains `d'.
+exclude_expsyms="_GLOBAL_OFFSET_TABLE_"
+# Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out
+# platforms (ab)use it in PIC code, but their linkers get confused if
+# the symbol is explicitly referenced.  Since portable code cannot
+# rely on this symbol name, it's probably fine to never include it in
+# preloaded symbol tables.
+extract_expsyms_cmds=
+
+case $host_os in
+cygwin* | mingw* | pw32* )
+  # FIXME: the MSVC++ port hasn't been tested in a loooong time
+  # When not using gcc, we currently assume that we are using
+  # Microsoft Visual C++.
+  if test "$GCC" != yes; then
+    with_gnu_ld=no
+  fi
+  ;;
+
+esac
+
+ld_shlibs=yes
+if test "$with_gnu_ld" = yes; then
+  # If archive_cmds runs LD, not CC, wlarc should be empty
+  wlarc='${wl}'
+
+  # See if GNU ld supports shared libraries.
+  case $host_os in
+  aix3* | aix4* | aix5*)
+    # On AIX, the GNU linker is very broken
+    # Note:Check GNU linker on AIX 5-IA64 when/if it becomes available.
+    ld_shlibs=no
+    cat <<EOF 1>&2
+
+*** Warning: the GNU linker, at least up to release 2.9.1, is reported
+*** to be unable to reliably create shared libraries on AIX.
+*** Therefore, libtool is disabling shared libraries support.  If you
+*** really care for shared libraries, you may want to modify your PATH
+*** so that a non-GNU linker is found, and then restart.
+
+EOF
+    ;;
+
+  amigaos*)
+    archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_minus_L=yes
+
+    # Samuel A. Falvo II <kc5tja@dolphin.openprojects.net> reports
+    # that the semantics of dynamic libraries on AmigaOS, at least up
+    # to version 4, is to share data among multiple programs linked
+    # with the same dynamic library.  Since this doesn't match the
+    # behavior of shared libraries on other platforms, we can use
+    # them.
+    ld_shlibs=no
+    ;;
+
+  beos*)
+    if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
+      allow_undefined_flag=unsupported
+      # Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+      # support --undefined.  This deserves some investigation.  FIXME
+      archive_cmds='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+    else
+      ld_shlibs=no
+    fi
+    ;;
+
+  cygwin* | mingw* | pw32*)
+    # hardcode_libdir_flag_spec is actually meaningless, as there is
+    # no search path for DLLs.
+    hardcode_libdir_flag_spec='-L$libdir'
+    allow_undefined_flag=unsupported
+    always_export_symbols=yes
+
+    extract_expsyms_cmds='test -f $output_objdir/impgen.c || \
+      sed -e "/^# \/\* impgen\.c starts here \*\//,/^# \/\* impgen.c ends here \*\// { s/^# //;s/^# *$//; p; }" -e d < $''0 > $output_objdir/impgen.c~
+      test -f $output_objdir/impgen.exe || (cd $output_objdir && \
+      if test "x$HOST_CC" != "x" ; then $HOST_CC -o impgen impgen.c ; \
+      else $CC -o impgen impgen.c ; fi)~
+      $output_objdir/impgen $dir/$soroot > $output_objdir/$soname-def'
+
+    old_archive_from_expsyms_cmds='$DLLTOOL --as=$AS --dllname $soname --def $output_objdir/$soname-def --output-lib $output_objdir/$newlib'
+
+    # cygwin and mingw dlls have different entry points and sets of symbols
+    # to exclude.
+    # FIXME: what about values for MSVC?
+    dll_entry=__cygwin_dll_entry@12
+    dll_exclude_symbols=DllMain@12,_cygwin_dll_entry@12,_cygwin_noncygwin_dll_entry@12~
+    case $host_os in
+    mingw*)
+      # mingw values
+      dll_entry=_DllMainCRTStartup@12
+      dll_exclude_symbols=DllMain@12,DllMainCRTStartup@12,DllEntryPoint@12~
+      ;;
+    esac
+
+    # mingw and cygwin differ, and it's simplest to just exclude the union
+    # of the two symbol sets.
+    dll_exclude_symbols=DllMain@12,_cygwin_dll_entry@12,_cygwin_noncygwin_dll_entry@12,DllMainCRTStartup@12,DllEntryPoint@12
+
+    # recent cygwin and mingw systems supply a stub DllMain which the user
+    # can override, but on older systems we have to supply one (in ltdll.c)
+    if test "x$lt_cv_need_dllmain" = "xyes"; then
+      ltdll_obj='$output_objdir/$soname-ltdll.'"$ac_objext "
+      ltdll_cmds='test -f $output_objdir/$soname-ltdll.c || sed -e "/^# \/\* ltdll\.c starts here \*\//,/^# \/\* ltdll.c ends here \*\// { s/^# //; p; }" -e d < [$]0 > $output_objdir/$soname-ltdll.c~
+	test -f $output_objdir/$soname-ltdll.$ac_objext || (cd $output_objdir && $CC -c $soname-ltdll.c)~'
+    else
+      ltdll_obj=
+      ltdll_cmds=
+    fi
+
+    # Extract the symbol export list from an `--export-all' def file,
+    # then regenerate the def file from the symbol export list, so that
+    # the compiled dll only exports the symbol export list.
+    # Be careful not to strip the DATA tag left be newer dlltools.
+    export_symbols_cmds="$ltdll_cmds"'
+      $DLLTOOL --export-all --exclude-symbols '$dll_exclude_symbols' --output-def $output_objdir/$soname-def '$ltdll_obj'$libobjs $convenience~
+      sed -e "1,/EXPORTS/d" -e "s/ @ [0-9]*//" -e "s/ *;.*$//" < $output_objdir/$soname-def > $export_symbols'
+
+    # If the export-symbols file already is a .def file (1st line
+    # is EXPORTS), use it as is.
+    # If DATA tags from a recent dlltool are present, honour them!
+    archive_expsym_cmds='if test "x`head -1 $export_symbols`" = xEXPORTS; then
+        cp $export_symbols $output_objdir/$soname-def;
+      else
+        echo EXPORTS > $output_objdir/$soname-def;
+        _lt_hint=1;
+        cat $export_symbols | while read symbol; do
+         set dummy \$symbol;
+         case \$# in
+           2) echo "   \$2 @ \$_lt_hint ; " >> $output_objdir/$soname-def;;
+           *) echo "     \$2 @ \$_lt_hint \$3 ; " >> $output_objdir/$soname-def;;
+         esac;
+         _lt_hint=`expr 1 + \$_lt_hint`;
+        done;
+      fi~
+      '"$ltdll_cmds"'
+      $CC -Wl,--base-file,$output_objdir/$soname-base '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $output_objdir/$soname '$ltdll_obj'$libobjs $deplibs $compiler_flags~
+      $DLLTOOL --as=$AS --dllname $soname --exclude-symbols '$dll_exclude_symbols' --def $output_objdir/$soname-def --base-file $output_objdir/$soname-base --output-exp $output_objdir/$soname-exp~
+      $CC -Wl,--base-file,$output_objdir/$soname-base $output_objdir/$soname-exp '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $output_objdir/$soname '$ltdll_obj'$libobjs $deplibs $compiler_flags~
+      $DLLTOOL --as=$AS --dllname $soname --exclude-symbols '$dll_exclude_symbols' --def $output_objdir/$soname-def --base-file $output_objdir/$soname-base --output-exp $output_objdir/$soname-exp --output-lib $output_objdir/$libname.dll.a~
+      $CC $output_objdir/$soname-exp '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $output_objdir/$soname '$ltdll_obj'$libobjs $deplibs $compiler_flags'
+    ;;
+
+  netbsd*)
+    if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
+      archive_cmds='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
+      wlarc=
+    else
+      archive_cmds='$CC -shared -nodefaultlibs $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      archive_expsym_cmds='$CC -shared -nodefaultlibs $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+    fi
+    ;;
+
+  solaris* | sysv5*)
+    if $LD -v 2>&1 | egrep 'BFD 2\.8' > /dev/null; then
+      ld_shlibs=no
+      cat <<EOF 1>&2
+
+*** Warning: The releases 2.8.* of the GNU linker cannot reliably
+*** create shared libraries on Solaris systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.9.1 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+EOF
+    elif $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
+      archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+    else
+      ld_shlibs=no
+    fi
+    ;;
+
+  sunos4*)
+    archive_cmds='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+    wlarc=
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  *)
+    if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
+      archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+    else
+      ld_shlibs=no
+    fi
+    ;;
+  esac
+
+  if test "$ld_shlibs" = yes; then
+    runpath_var=LD_RUN_PATH
+    hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
+    export_dynamic_flag_spec='${wl}--export-dynamic'
+    case $host_os in
+    cygwin* | mingw* | pw32*)
+      # dlltool doesn't understand --whole-archive et. al.
+      whole_archive_flag_spec=
+      ;;
+    *)
+      # ancient GNU ld didn't support --whole-archive et. al.
+      if $LD --help 2>&1 | egrep 'no-whole-archive' > /dev/null; then
+	whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
+      else
+	whole_archive_flag_spec=
+      fi
+      ;;
+    esac
+  fi
+else
+  # PORTME fill in a description of your system's linker (not GNU ld)
+  case $host_os in
+  aix3*)
+    allow_undefined_flag=unsupported
+    always_export_symbols=yes
+    archive_expsym_cmds='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
+    # Note: this linker hardcodes the directories in LIBPATH if there
+    # are no directories specified by -L.
+    hardcode_minus_L=yes
+    if test "$GCC" = yes && test -z "$link_static_flag"; then
+      # Neither direct hardcoding nor static linking is supported with a
+      # broken collect2.
+      hardcode_direct=unsupported
+    fi
+    ;;
+
+  aix4* | aix5*)
+    # When large executables or shared objects are built, AIX ld can
+    # have problems creating the table of contents.  If linking a library
+    # or program results in "error TOC overflow" add -mminimal-toc to
+    # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+    # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+    archive_cmds=''
+    hardcode_libdir_separator=':'
+    if test "$GCC" = yes; then
+      collect2name=`${CC} -print-prog-name=collect2`
+      if test -f "$collect2name" && \
+	 strings "$collect2name" | grep resolve_lib_name >/dev/null
+      then
+	# We have reworked collect2
+	hardcode_direct=yes
+      else
+        # We have old collect2
+        hardcode_direct=unsupported
+        # It fails to find uninstalled libraries when the uninstalled
+        # path is not listed in the libpath.  Setting hardcode_minus_L
+        # to unsupported forces relinking
+        hardcode_minus_L=yes
+        hardcode_libdir_flag_spec='-L$libdir'
+        hardcode_libdir_separator=
+      fi
+      shared_flag='-shared'
+    else
+      if test "$host_cpu" = ia64; then
+        shared_flag='-G'
+      else
+        shared_flag='${wl}-bM:SRE'
+      fi
+      hardcode_direct=yes
+    fi
+
+    if test "$host_cpu" = ia64; then
+      # On IA64, the linker does run time linking by default, so we don't
+      # have to do anything special.
+      aix_use_runtimelinking=no
+      exp_sym_flag='-Bexport'
+      no_entry_flag=""
+    else
+      # Test if we are trying to use run time linking, or normal AIX style linking.
+      # If -brtl is somewhere in LDFLAGS, we need to do run time linking.
+      aix_use_runtimelinking=no
+      for ld_flag in $LDFLAGS; do
+        if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl" ); then
+          aix_use_runtimelinking=yes
+          break
+        fi
+      done
+      exp_sym_flag='-bexport'
+      no_entry_flag='-bnoentry'
+    fi
+    # It seems that -bexpall can do strange things, so it is better to
+    # generate a list of symbols to export.
+    always_export_symbols=yes
+    if test "$aix_use_runtimelinking" = yes; then
+      hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:/usr/lib:/lib'
+      allow_undefined_flag=' -Wl,-G'
+      archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}$exp_sym_flag:\$export_symbols"
+    else
+      if test "$host_cpu" = ia64; then
+        hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
+       allow_undefined_flag="-znodefs"
+        archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname ${wl}-h$soname $libobjs $deplibs $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}$exp_sym_flag:\$export_symbols"
+      else
+        hardcode_libdir_flag_spec='${wl}-bnolibpath ${wl}-blibpath:$libdir:/usr/lib:/lib'
+        # Warning - without using the other run time loading flags, -berok will
+        #           link without error, but may produce a broken library.
+        allow_undefined_flag='${wl}-berok"
+        # This is a bit strange, but is similar to how AIX traditionally builds
+        # it's shared libraries.
+        archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}$exp_sym_flag:\$export_symbols"' ~$AR -crlo $objdir/$libname$release.a $objdir/$soname'
+      fi
+    fi
+    ;;
+
+  amigaos*)
+    archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_minus_L=yes
+    # see comment about different semantics on the GNU ld section
+    ld_shlibs=no
+    ;;
+
+  cygwin* | mingw* | pw32*)
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    # hardcode_libdir_flag_spec is actually meaningless, as there is
+    # no search path for DLLs.
+    hardcode_libdir_flag_spec=' '
+    allow_undefined_flag=unsupported
+    # Tell ltmain to make .lib files, not .a files.
+    libext=lib
+    # FIXME: Setting linknames here is a bad hack.
+    archive_cmds='$CC -o $lib $libobjs $compiler_flags `echo "$deplibs" | sed -e '\''s/ -lc$//'\''` -link -dll~linknames='
+    # The linker will automatically build a .lib file if we build a DLL.
+    old_archive_from_new_cmds='true'
+    # FIXME: Should let the user specify the lib program.
+    old_archive_cmds='lib /OUT:$oldlib$oldobjs$old_deplibs'
+    fix_srcfile_path='`cygpath -w "$srcfile"`'
+    ;;
+
+  darwin* | rhapsody*)
+    # This patch put in by hand by PH (10-Dec-2003) for Darwin 1.3. 
+    case "$host_os" in
+      rhapsody* | darwin1.[[012]])
+       allow_undefined_flag='-undefined suppress'
+       ;;
+      *) # Darwin 1.3 on
+       allow_undefined_flag='-flat_namespace -undefined suppress'
+       ;;
+    esac
+    # End of hand-inserted patch
+
+    # FIXME: Relying on posixy $() will cause problems for
+    #        cross-compilation, but unfortunately the echo tests do not
+    #        yet detect zsh echo's removal of \ escapes.
+    archive_cmds='$CC $(test .$module = .yes && echo -bundle || echo -dynamiclib) $allow_undefined_flag -o $lib $libobjs $deplibs$linkopts -install_name $rpath/$soname $(test -n "$verstring" -a x$verstring != x0.0 && echo $verstring)'
+    # We need to add '_' to the symbols in $export_symbols first
+    #archive_expsym_cmds="$archive_cmds"' && strip -s $export_symbols'
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    whole_archive_flag_spec='-all_load $convenience'
+    ;;
+
+  freebsd1*)
+    ld_shlibs=no
+    ;;
+
+  # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
+  # support.  Future versions do this automatically, but an explicit c++rt0.o
+  # does not break anything, and helps significantly (at the cost of a little
+  # extra space).
+  freebsd2.2*)
+    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
+    hardcode_libdir_flag_spec='-R$libdir'
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  # Unfortunately, older versions of FreeBSD 2 do not have this feature.
+  freebsd2*)
+    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_direct=yes
+    hardcode_minus_L=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
+  freebsd*)
+    archive_cmds='$CC -shared -o $lib $libobjs $deplibs $compiler_flags'
+    hardcode_libdir_flag_spec='-R$libdir'
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  hpux9* | hpux10* | hpux11*)
+    case $host_os in
+    hpux9*) archive_cmds='$rm $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' ;;
+    *) archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags' ;;
+    esac
+    hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+    hardcode_libdir_separator=:
+    hardcode_direct=yes
+    hardcode_minus_L=yes # Not in the search PATH, but as the default
+			 # location of the library.
+    export_dynamic_flag_spec='${wl}-E'
+    ;;
+
+  irix5* | irix6*)
+    if test "$GCC" = yes; then
+      archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+    else
+      archive_cmds='$LD -shared $libobjs $deplibs $linker_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${output_objdir}/so_locations -o $lib'
+    fi
+    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+    hardcode_libdir_separator=:
+    link_all_deplibs=yes
+    ;;
+
+  netbsd*)
+    if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
+      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
+    else
+      archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
+    fi
+    hardcode_libdir_flag_spec='-R$libdir'
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  newsos6)
+    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
+    hardcode_direct=yes
+    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+    hardcode_libdir_separator=:
+    hardcode_shlibpath_var=no
+    ;;
+
+  openbsd*)
+    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_libdir_flag_spec='-R$libdir'
+    hardcode_direct=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  os2*)
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_minus_L=yes
+    allow_undefined_flag=unsupported
+    archive_cmds='$echo "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$echo "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~$echo DATA >> $output_objdir/$libname.def~$echo " SINGLE NONSHARED" >> $output_objdir/$libname.def~$echo EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def'
+    old_archive_from_new_cmds='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def'
+    ;;
+
+  osf3*)
+    if test "$GCC" = yes; then
+      allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
+      archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+    else
+      allow_undefined_flag=' -expect_unresolved \*'
+      archive_cmds='$LD -shared${allow_undefined_flag} $libobjs $deplibs $linker_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${output_objdir}/so_locations -o $lib'
+    fi
+    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+    hardcode_libdir_separator=:
+    ;;
+
+  osf4* | osf5*)	# as osf3* with the addition of -msym flag
+    if test "$GCC" = yes; then
+      allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
+      archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+    else
+      allow_undefined_flag=' -expect_unresolved \*'
+      archive_cmds='$LD -shared${allow_undefined_flag} $libobjs $deplibs $linker_flags -msym -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${output_objdir}/so_locations -o $lib'
+      archive_expsym_cmds='for i in `cat $export_symbols`; do printf "-exported_symbol " >> $lib.exp; echo "\$i" >> $lib.exp; done; echo "-hidden">> $lib.exp~
+      $LD -shared${allow_undefined_flag} -input $lib.exp $linker_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib~$rm $lib.exp'
+
+      #Both c and cxx compiler support -rpath directly
+      hardcode_libdir_flag_spec='-rpath $libdir'
+    fi
+    hardcode_libdir_separator=:
+    ;;
+
+  sco3.2v5*)
+    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_shlibpath_var=no
+    runpath_var=LD_RUN_PATH
+    hardcode_runpath_var=yes
+    ;;
+
+  solaris*)
+    no_undefined_flag=' -z defs'
+    # $CC -shared without GNU ld will not create a library from C++
+    # object files and a static libstdc++, better avoid it by now
+    archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
+		$LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$rm $lib.exp'
+    hardcode_libdir_flag_spec='-R$libdir'
+    hardcode_shlibpath_var=no
+    case $host_os in
+    solaris2.[0-5] | solaris2.[0-5].*) ;;
+    *) # Supported since Solaris 2.6 (maybe 2.5.1?)
+      whole_archive_flag_spec='-z allextract$convenience -z defaultextract' ;;
+    esac
+    link_all_deplibs=yes
+    ;;
+
+  sunos4*)
+    if test "x$host_vendor" = xsequent; then
+      # Use $CC to link under sequent, because it throws in some extra .o
+      # files that make .init and .fini sections work.
+      archive_cmds='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags'
+    else
+      archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
+    fi
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_direct=yes
+    hardcode_minus_L=yes
+    hardcode_shlibpath_var=no
+    ;;
+
+  sysv4)
+    if test "x$host_vendor" = xsno; then
+      archive_cmds='$LD -G -Bsymbolic -h $soname -o $lib $libobjs $deplibs $linkopts'
+      hardcode_direct=yes # is this really true???
+    else
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_direct=no #Motorola manual says yes, but my tests say they lie
+    fi
+    runpath_var='LD_RUN_PATH'
+    hardcode_shlibpath_var=no
+    ;;
+
+  sysv4.3*)
+    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_shlibpath_var=no
+    export_dynamic_flag_spec='-Bexport'
+    ;;
+
+  sysv5*)
+    no_undefined_flag=' -z text'
+    # $CC -shared without GNU ld will not create a library from C++
+    # object files and a static libstdc++, better avoid it by now
+    archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
+		$LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$rm $lib.exp'
+    hardcode_libdir_flag_spec=
+    hardcode_shlibpath_var=no
+    runpath_var='LD_RUN_PATH'
+    ;;
+
+  uts4*)
+    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_shlibpath_var=no
+    ;;
+
+  dgux*)
+    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_libdir_flag_spec='-L$libdir'
+    hardcode_shlibpath_var=no
+    ;;
+
+  sysv4*MP*)
+    if test -d /usr/nec; then
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_shlibpath_var=no
+      runpath_var=LD_RUN_PATH
+      hardcode_runpath_var=yes
+      ld_shlibs=yes
+    fi
+    ;;
+
+  sysv4.2uw2*)
+    archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags'
+    hardcode_direct=yes
+    hardcode_minus_L=no
+    hardcode_shlibpath_var=no
+    hardcode_runpath_var=yes
+    runpath_var=LD_RUN_PATH
+    ;;
+
+  sysv5uw7* | unixware7*)
+    no_undefined_flag='${wl}-z ${wl}text'
+    if test "$GCC" = yes; then
+      archive_cmds='$CC -shared ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+    else
+      archive_cmds='$CC -G ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+    fi
+    runpath_var='LD_RUN_PATH'
+    hardcode_shlibpath_var=no
+    ;;
+
+  *)
+    ld_shlibs=no
+    ;;
+  esac
+fi
+echo "$as_me:$LINENO: result: $ld_shlibs" >&5
+echo "${ECHO_T}$ld_shlibs" >&6
+test "$ld_shlibs" = no && can_build_shared=no
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+# Check hardcoding attributes.
+echo "$as_me:$LINENO: checking how to hardcode library paths into programs" >&5
+echo $ECHO_N "checking how to hardcode library paths into programs... $ECHO_C" >&6
+hardcode_action=
+if test -n "$hardcode_libdir_flag_spec" || \
+   test -n "$runpath_var"; then
+
+  # We can hardcode non-existant directories.
+  if test "$hardcode_direct" != no &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test "$hardcode_shlibpath_var" != no &&
+     test "$hardcode_minus_L" != no; then
+    # Linking always hardcodes the temporary library directory.
+    hardcode_action=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    hardcode_action=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  hardcode_action=unsupported
+fi
+echo "$as_me:$LINENO: result: $hardcode_action" >&5
+echo "${ECHO_T}$hardcode_action" >&6
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+striplib=
+old_striplib=
+echo "$as_me:$LINENO: checking whether stripping libraries is possible" >&5
+echo $ECHO_N "checking whether stripping libraries is possible... $ECHO_C" >&6
+if test -n "$STRIP" && $STRIP -V 2>&1 | grep "GNU strip" >/dev/null; then
+  test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
+  test -z "$striplib" && striplib="$STRIP --strip-unneeded"
+  echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+##
+## END FIXME
+
+reload_cmds='$LD$reload_flag -o $output$reload_objs'
+test -z "$deplibs_check_method" && deplibs_check_method=unknown
+
+## FIXME: this should be a separate macro
+##
+# PORTME Fill in your ld.so characteristics
+echo "$as_me:$LINENO: checking dynamic linker characteristics" >&5
+echo $ECHO_N "checking dynamic linker characteristics... $ECHO_C" >&6
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+
+case $host_os in
+aix3*)
+  version_type=linux
+  library_names_spec='${libname}${release}.so$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX has no versioning support, so we append a major version to the name.
+  soname_spec='${libname}${release}.so$major'
+  ;;
+
+aix4* | aix5*)
+  version_type=linux
+  if test "$host_cpu" = ia64; then
+    # AIX 5 supports IA64
+    library_names_spec='${libname}${release}.so$major ${libname}${release}.so$versuffix $libname.so'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line `#! .'.  This would cause the generated library to
+    # depend on `.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+       aix4 | aix4.[01] | aix4.[01].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+           echo ' yes '
+           echo '#endif'; } | ${CC} -E - | grep yes > /dev/null; then
+        :
+      else
+        can_build_shared=no
+      fi
+      ;;
+    esac
+    # AIX (on Power*) has no versioning support, so currently we can not hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    if test "$aix_use_runtimelinking" = yes; then
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so instead of
+      # lib<name>.a to let people know that these are not typical AIX shared libraries.
+      library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+    else
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='${libname}${release}.a $libname.a'
+      soname_spec='${libname}${release}.so$major'
+    fi
+    shlibpath_var=LIBPATH
+    deplibs_check_method=pass_all
+  fi
+  ;;
+
+amigaos*)
+  library_names_spec='$libname.ixlibrary $libname.a'
+  # Create ${libname}_ixlibrary.a entries in /sys/libs.
+  finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$echo "X$lib" | $Xsed -e '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $rm /sys/libs/${libname}_ixlibrary.a; $show "(cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a)"; (cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a) || exit 1; done'
+  ;;
+
+beos*)
+  library_names_spec='${libname}.so'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi4*)
+  version_type=linux
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  export_dynamic_flag_spec=-rdynamic
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32*)
+  version_type=windows
+  need_version=no
+  need_lib_prefix=no
+  case $GCC,$host_os in
+  yes,cygwin*)
+    library_names_spec='$libname.dll.a'
+    soname_spec='`echo ${libname} | sed -e 's/^lib/cyg/'``echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll'
+    postinstall_cmds='dlpath=`bash 2>&1 -c '\''. $dir/${file}i;echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog .libs/$dlname \$dldir/$dlname'
+    postuninstall_cmds='dldll=`bash 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $rm \$dlpath'
+    ;;
+  yes,mingw*)
+    library_names_spec='${libname}`echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll'
+    sys_lib_search_path_spec=`$CC -print-search-dirs | grep "^libraries:" | sed -e "s/^libraries://" -e "s/;/ /g"`
+    ;;
+  yes,pw32*)
+    library_names_spec='`echo ${libname} | sed -e 's/^lib/pw/'``echo ${release} | sed -e 's/./-/g'`${versuffix}.dll'
+    ;;
+  *)
+    library_names_spec='${libname}`echo ${release} | sed -e 's/[.]/-/g'`${versuffix}.dll $libname.lib'
+    ;;
+  esac
+  dynamic_linker='Win32 ld.exe'
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  # FIXME: Relying on posixy $() will cause problems for
+  #        cross-compilation, but unfortunately the echo tests do not
+  #        yet detect zsh echo's removal of \ escapes.
+  library_names_spec='${libname}${release}${versuffix}.$(test .$module = .yes && echo so || echo dylib) ${libname}${release}${major}.$(test .$module = .yes && echo so || echo dylib) ${libname}.$(test .$module = .yes && echo so || echo dylib)'
+  soname_spec='${libname}${release}${major}.$(test .$module = .yes && echo so || echo dylib)'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  ;;
+
+freebsd1*)
+  dynamic_linker=no
+  ;;
+
+freebsd*)
+  objformat=`test -x /usr/bin/objformat && /usr/bin/objformat || echo aout`
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so $libname.so'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='${libname}${release}.so$versuffix $libname.so$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  *)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+gnu*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so${major} ${libname}.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  dynamic_linker="$host_os dld.sl"
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  shlibpath_var=SHLIB_PATH
+  shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+  library_names_spec='${libname}${release}.sl$versuffix ${libname}${release}.sl$major $libname.sl'
+  soname_spec='${libname}${release}.sl$major'
+  # HP-UX runs *really* slowly unless shared libraries are mode 555.
+  postinstall_cmds='chmod 555 $lib'
+  ;;
+
+irix5* | irix6*)
+  version_type=irix
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='${libname}${release}.so$major'
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major ${libname}${release}.so $libname.so'
+  case $host_os in
+  irix5*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 ") libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 ") libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 ") libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}"
+  sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}"
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux-gnuoldld* | linux-gnuaout* | linux-gnucoff*)
+  dynamic_linker=no
+  ;;
+
+# This must be Linux ELF.
+linux-gnu*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
+    library_names_spec='${libname}${release}.so$versuffix ${libname}.so$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major ${libname}${release}.so ${libname}.so'
+    soname_spec='${libname}${release}.so$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+openbsd*)
+  version_type=sunos
+  if test "$with_gnu_ld" = yes; then
+    need_lib_prefix=no
+    need_version=no
+  fi
+  library_names_spec='${libname}${release}.so$versuffix ${libname}.so$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+os2*)
+  libname_spec='$name'
+  need_lib_prefix=no
+  library_names_spec='$libname.dll $libname.a'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=LIBPATH
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_version=no
+  soname_spec='${libname}${release}.so'
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so $libname.so'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec"
+  ;;
+
+sco3.2v5*)
+  version_type=osf
+  soname_spec='${libname}${release}.so$major'
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+solaris*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='${libname}${release}.so$versuffix ${libname}.so$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test "$with_gnu_ld" = yes; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+  version_type=linux
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+uts4*)
+  version_type=linux
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+dgux*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+  soname_spec='${libname}${release}.so$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec ;then
+    version_type=linux
+    library_names_spec='$libname.so.$versuffix $libname.so.$major $libname.so'
+    soname_spec='$libname.so.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+echo "$as_me:$LINENO: result: $dynamic_linker" >&5
+echo "${ECHO_T}$dynamic_linker" >&6
+test "$dynamic_linker" = no && can_build_shared=no
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+# Report the final consequences.
+echo "$as_me:$LINENO: checking if libtool supports shared libraries" >&5
+echo $ECHO_N "checking if libtool supports shared libraries... $ECHO_C" >&6
+echo "$as_me:$LINENO: result: $can_build_shared" >&5
+echo "${ECHO_T}$can_build_shared" >&6
+##
+## END FIXME
+
+if test "$hardcode_action" = relink; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test "$shlibpath_overrides_runpath" = yes ||
+     test "$enable_shared" = no; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test "$GCC" = yes; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test "x$enable_dlopen" != xyes; then
+  enable_dlopen=unknown
+  enable_dlopen_self=unknown
+  enable_dlopen_self_static=unknown
+else
+  lt_cv_dlopen=no
+  lt_cv_dlopen_libs=
+
+  case $host_os in
+  beos*)
+    lt_cv_dlopen="load_add_on"
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ;;
+
+  cygwin* | mingw* | pw32*)
+    lt_cv_dlopen="LoadLibrary"
+    lt_cv_dlopen_libs=
+   ;;
+
+  *)
+    echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
+echo $ECHO_N "checking for dlopen in -ldl... $ECHO_C" >&6
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dlopen ();
+int
+main ()
+{
+dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_dl_dlopen=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_dl_dlopen=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_dl_dlopen" >&5
+echo "${ECHO_T}$ac_cv_lib_dl_dlopen" >&6
+if test $ac_cv_lib_dl_dlopen = yes; then
+  lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"
+else
+  echo "$as_me:$LINENO: checking for dlopen" >&5
+echo $ECHO_N "checking for dlopen... $ECHO_C" >&6
+if test "${ac_cv_func_dlopen+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char dlopen (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dlopen ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_dlopen) || defined (__stub___dlopen)
+choke me
+#else
+char (*f) () = dlopen;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != dlopen;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_dlopen=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_dlopen=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_dlopen" >&5
+echo "${ECHO_T}$ac_cv_func_dlopen" >&6
+if test $ac_cv_func_dlopen = yes; then
+  lt_cv_dlopen="dlopen"
+else
+  echo "$as_me:$LINENO: checking for shl_load" >&5
+echo $ECHO_N "checking for shl_load... $ECHO_C" >&6
+if test "${ac_cv_func_shl_load+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char shl_load (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char shl_load ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_shl_load) || defined (__stub___shl_load)
+choke me
+#else
+char (*f) () = shl_load;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != shl_load;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_shl_load=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_shl_load=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_shl_load" >&5
+echo "${ECHO_T}$ac_cv_func_shl_load" >&6
+if test $ac_cv_func_shl_load = yes; then
+  lt_cv_dlopen="shl_load"
+else
+  echo "$as_me:$LINENO: checking for dlopen in -lsvld" >&5
+echo $ECHO_N "checking for dlopen in -lsvld... $ECHO_C" >&6
+if test "${ac_cv_lib_svld_dlopen+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsvld  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dlopen ();
+int
+main ()
+{
+dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_svld_dlopen=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_svld_dlopen=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_svld_dlopen" >&5
+echo "${ECHO_T}$ac_cv_lib_svld_dlopen" >&6
+if test $ac_cv_lib_svld_dlopen = yes; then
+  lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld"
+else
+  echo "$as_me:$LINENO: checking for shl_load in -ldld" >&5
+echo $ECHO_N "checking for shl_load in -ldld... $ECHO_C" >&6
+if test "${ac_cv_lib_dld_shl_load+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldld  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char shl_load ();
+int
+main ()
+{
+shl_load ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_dld_shl_load=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_dld_shl_load=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_dld_shl_load" >&5
+echo "${ECHO_T}$ac_cv_lib_dld_shl_load" >&6
+if test $ac_cv_lib_dld_shl_load = yes; then
+  lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-dld"
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+    ;;
+  esac
+
+  if test "x$lt_cv_dlopen" != xno; then
+    enable_dlopen=yes
+  else
+    enable_dlopen=no
+  fi
+
+  case $lt_cv_dlopen in
+  dlopen)
+    save_CPPFLAGS="$CPPFLAGS"
+        test "x$ac_cv_header_dlfcn_h" = xyes && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"
+
+    save_LDFLAGS="$LDFLAGS"
+    eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"
+
+    save_LIBS="$LIBS"
+    LIBS="$lt_cv_dlopen_libs $LIBS"
+
+    echo "$as_me:$LINENO: checking whether a program can dlopen itself" >&5
+echo $ECHO_N "checking whether a program can dlopen itself... $ECHO_C" >&6
+if test "${lt_cv_dlopen_self+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  	  if test "$cross_compiling" = yes; then :
+  lt_cv_dlopen_self=cross
+else
+    lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<EOF
+#line 6214 "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+#ifdef __cplusplus
+extern "C" void exit (int);
+#endif
+
+void fnord() { int i=42;}
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;
+      /* dlclose (self); */
+    }
+
+    exit (status);
+}
+EOF
+  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && test -s conftest${ac_exeext} 2>/dev/null; then
+    (./conftest; exit; ) 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_unknown|x*) lt_cv_dlopen_self=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+echo "$as_me:$LINENO: result: $lt_cv_dlopen_self" >&5
+echo "${ECHO_T}$lt_cv_dlopen_self" >&6
+
+    if test "x$lt_cv_dlopen_self" = xyes; then
+      LDFLAGS="$LDFLAGS $link_static_flag"
+      echo "$as_me:$LINENO: checking whether a statically linked program can dlopen itself" >&5
+echo $ECHO_N "checking whether a statically linked program can dlopen itself... $ECHO_C" >&6
+if test "${lt_cv_dlopen_self_static+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  	  if test "$cross_compiling" = yes; then :
+  lt_cv_dlopen_self_static=cross
+else
+    lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<EOF
+#line 6312 "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+#ifdef __cplusplus
+extern "C" void exit (int);
+#endif
+
+void fnord() { int i=42;}
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;
+      /* dlclose (self); */
+    }
+
+    exit (status);
+}
+EOF
+  if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && test -s conftest${ac_exeext} 2>/dev/null; then
+    (./conftest; exit; ) 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_unknown|x*) lt_cv_dlopen_self_static=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self_static=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+echo "$as_me:$LINENO: result: $lt_cv_dlopen_self_static" >&5
+echo "${ECHO_T}$lt_cv_dlopen_self_static" >&6
+    fi
+
+    CPPFLAGS="$save_CPPFLAGS"
+    LDFLAGS="$save_LDFLAGS"
+    LIBS="$save_LIBS"
+    ;;
+  esac
+
+  case $lt_cv_dlopen_self in
+  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
+  *) enable_dlopen_self=unknown ;;
+  esac
+
+  case $lt_cv_dlopen_self_static in
+  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
+  *) enable_dlopen_self_static=unknown ;;
+  esac
+fi
+
+
+## FIXME: this should be a separate macro
+##
+if test "$enable_shared" = yes && test "$GCC" = yes; then
+  case $archive_cmds in
+  *'~'*)
+    # FIXME: we may have to deal with multi-command sequences.
+    ;;
+  '$CC '*)
+    # Test whether the compiler implicitly links with -lc since on some
+    # systems, -lgcc has to come before -lc. If gcc already passes -lc
+    # to ld, don't add -lc before -lgcc.
+    echo "$as_me:$LINENO: checking whether -lc should be explicitly linked in" >&5
+echo $ECHO_N "checking whether -lc should be explicitly linked in... $ECHO_C" >&6
+    if test "${lt_cv_archive_cmds_need_lc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  $rm conftest*
+    echo 'static int dummy;' > conftest.$ac_ext
+
+    if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+      soname=conftest
+      lib=conftest
+      libobjs=conftest.$ac_objext
+      deplibs=
+      wl=$lt_cv_prog_cc_wl
+      compiler_flags=-v
+      linker_flags=-v
+      verstring=
+      output_objdir=.
+      libname=conftest
+      save_allow_undefined_flag=$allow_undefined_flag
+      allow_undefined_flag=
+      if { (eval echo "$as_me:$LINENO: \"$archive_cmds 2\>\&1 \| grep \" -lc \" \>/dev/null 2\>\&1\"") >&5
+  (eval $archive_cmds 2\>\&1 \| grep \" -lc \" \>/dev/null 2\>\&1) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+      then
+	lt_cv_archive_cmds_need_lc=no
+      else
+	lt_cv_archive_cmds_need_lc=yes
+      fi
+      allow_undefined_flag=$save_allow_undefined_flag
+    else
+      cat conftest.err 1>&5
+    fi
+fi
+
+    echo "$as_me:$LINENO: result: $lt_cv_archive_cmds_need_lc" >&5
+echo "${ECHO_T}$lt_cv_archive_cmds_need_lc" >&6
+    ;;
+  esac
+fi
+need_lc=${lt_cv_archive_cmds_need_lc-yes}
+##
+## END FIXME
+
+## FIXME: this should be a separate macro
+##
+# The second clause should only fire when bootstrapping the
+# libtool distribution, otherwise you forgot to ship ltmain.sh
+# with your package, and you will get complaints that there are
+# no rules to generate ltmain.sh.
+if test -f "$ltmain"; then
+  :
+else
+  # If there is no Makefile yet, we rely on a make rule to execute
+  # `config.status --recheck' to rerun these tests and create the
+  # libtool script then.
+  test -f Makefile && make "$ltmain"
+fi
+
+if test -f "$ltmain"; then
+  trap "$rm \"${ofile}T\"; exit 1" 1 2 15
+  $rm -f "${ofile}T"
+
+  echo creating $ofile
+
+  # Now quote all the things that may contain metacharacters while being
+  # careful not to overquote the AC_SUBSTed values.  We take copies of the
+  # variables and quote the copies for generation of the libtool script.
+  for var in echo old_CC old_CFLAGS \
+    AR AR_FLAGS CC LD LN_S NM SHELL \
+    reload_flag reload_cmds wl \
+    pic_flag link_static_flag no_builtin_flag export_dynamic_flag_spec \
+    thread_safe_flag_spec whole_archive_flag_spec libname_spec \
+    library_names_spec soname_spec \
+    RANLIB old_archive_cmds old_archive_from_new_cmds old_postinstall_cmds \
+    old_postuninstall_cmds archive_cmds archive_expsym_cmds postinstall_cmds \
+    postuninstall_cmds extract_expsyms_cmds old_archive_from_expsyms_cmds \
+    old_striplib striplib file_magic_cmd export_symbols_cmds \
+    deplibs_check_method allow_undefined_flag no_undefined_flag \
+    finish_cmds finish_eval global_symbol_pipe global_symbol_to_cdecl \
+    hardcode_libdir_flag_spec hardcode_libdir_separator  \
+    sys_lib_search_path_spec sys_lib_dlsearch_path_spec \
+    compiler_c_o compiler_o_lo need_locks exclude_expsyms include_expsyms; do
+
+    case $var in
+    reload_cmds | old_archive_cmds | old_archive_from_new_cmds | \
+    old_postinstall_cmds | old_postuninstall_cmds | \
+    export_symbols_cmds | archive_cmds | archive_expsym_cmds | \
+    extract_expsyms_cmds | old_archive_from_expsyms_cmds | \
+    postinstall_cmds | postuninstall_cmds | \
+    finish_cmds | sys_lib_search_path_spec | sys_lib_dlsearch_path_spec)
+      # Double-quote double-evaled strings.
+      eval "lt_$var=\\\"\`\$echo \"X\$$var\" | \$Xsed -e \"\$double_quote_subst\" -e \"\$sed_quote_subst\" -e \"\$delay_variable_subst\"\`\\\""
+      ;;
+    *)
+      eval "lt_$var=\\\"\`\$echo \"X\$$var\" | \$Xsed -e \"\$sed_quote_subst\"\`\\\""
+      ;;
+    esac
+  done
+
+  cat <<__EOF__ > "${ofile}T"
+#! $SHELL
+
+# `$echo "$ofile" | sed 's%^.*/%%'` - Provide generalized library-building support services.
+# Generated automatically by $PROGRAM (GNU $PACKAGE $VERSION$TIMESTAMP)
+# NOTE: Changes made to this file will be lost: look at ltmain.sh.
+#
+# Copyright (C) 1996-2000 Free Software Foundation, Inc.
+# Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Sed that helps us avoid accidentally triggering echo(1) options like -n.
+Xsed="sed -e s/^X//"
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+if test "X\${CDPATH+set}" = Xset; then CDPATH=:; export CDPATH; fi
+
+# ### BEGIN LIBTOOL CONFIG
+
+# Libtool was configured on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+
+# Shell to use when invoking shell scripts.
+SHELL=$lt_SHELL
+
+# Whether or not to build shared libraries.
+build_libtool_libs=$enable_shared
+
+# Whether or not to add -lc for building shared libraries.
+build_libtool_need_lc=$need_lc
+
+# Whether or not to build static libraries.
+build_old_libs=$enable_static
+
+# Whether or not to optimize for fast installation.
+fast_install=$enable_fast_install
+
+# The host system.
+host_alias=$host_alias
+host=$host
+
+# An echo program that does not interpret backslashes.
+echo=$lt_echo
+
+# The archiver.
+AR=$lt_AR
+AR_FLAGS=$lt_AR_FLAGS
+
+# The default C compiler.
+CC=$lt_CC
+
+# Is the compiler the GNU C compiler?
+with_gcc=$GCC
+
+# The linker used to build libraries.
+LD=$lt_LD
+
+# Whether we need hard or soft links.
+LN_S=$lt_LN_S
+
+# A BSD-compatible nm program.
+NM=$lt_NM
+
+# A symbol stripping program
+STRIP=$STRIP
+
+# Used to examine libraries when file_magic_cmd begins "file"
+MAGIC_CMD=$MAGIC_CMD
+
+# Used on cygwin: DLL creation program.
+DLLTOOL="$DLLTOOL"
+
+# Used on cygwin: object dumper.
+OBJDUMP="$OBJDUMP"
+
+# Used on cygwin: assembler.
+AS="$AS"
+
+# The name of the directory that contains temporary libtool files.
+objdir=$objdir
+
+# How to create reloadable object files.
+reload_flag=$lt_reload_flag
+reload_cmds=$lt_reload_cmds
+
+# How to pass a linker flag through the compiler.
+wl=$lt_wl
+
+# Object file suffix (normally "o").
+objext="$ac_objext"
+
+# Old archive suffix (normally "a").
+libext="$libext"
+
+# Executable file suffix (normally "").
+exeext="$exeext"
+
+# Additional compiler flags for building library objects.
+pic_flag=$lt_pic_flag
+pic_mode=$pic_mode
+
+# Does compiler simultaneously support -c and -o options?
+compiler_c_o=$lt_compiler_c_o
+
+# Can we write directly to a .lo ?
+compiler_o_lo=$lt_compiler_o_lo
+
+# Must we lock files when doing compilation ?
+need_locks=$lt_need_locks
+
+# Do we need the lib prefix for modules?
+need_lib_prefix=$need_lib_prefix
+
+# Do we need a version for libraries?
+need_version=$need_version
+
+# Whether dlopen is supported.
+dlopen_support=$enable_dlopen
+
+# Whether dlopen of programs is supported.
+dlopen_self=$enable_dlopen_self
+
+# Whether dlopen of statically linked programs is supported.
+dlopen_self_static=$enable_dlopen_self_static
+
+# Compiler flag to prevent dynamic linking.
+link_static_flag=$lt_link_static_flag
+
+# Compiler flag to turn off builtin functions.
+no_builtin_flag=$lt_no_builtin_flag
+
+# Compiler flag to allow reflexive dlopens.
+export_dynamic_flag_spec=$lt_export_dynamic_flag_spec
+
+# Compiler flag to generate shared objects directly from archives.
+whole_archive_flag_spec=$lt_whole_archive_flag_spec
+
+# Compiler flag to generate thread-safe objects.
+thread_safe_flag_spec=$lt_thread_safe_flag_spec
+
+# Library versioning type.
+version_type=$version_type
+
+# Format of library name prefix.
+libname_spec=$lt_libname_spec
+
+# List of archive names.  First name is the real one, the rest are links.
+# The last name is the one that the linker finds with -lNAME.
+library_names_spec=$lt_library_names_spec
+
+# The coded name of the library, if different from the real name.
+soname_spec=$lt_soname_spec
+
+# Commands used to build and install an old-style archive.
+RANLIB=$lt_RANLIB
+old_archive_cmds=$lt_old_archive_cmds
+old_postinstall_cmds=$lt_old_postinstall_cmds
+old_postuninstall_cmds=$lt_old_postuninstall_cmds
+
+# Create an old-style archive from a shared archive.
+old_archive_from_new_cmds=$lt_old_archive_from_new_cmds
+
+# Create a temporary old-style archive to link instead of a shared archive.
+old_archive_from_expsyms_cmds=$lt_old_archive_from_expsyms_cmds
+
+# Commands used to build and install a shared archive.
+archive_cmds=$lt_archive_cmds
+archive_expsym_cmds=$lt_archive_expsym_cmds
+postinstall_cmds=$lt_postinstall_cmds
+postuninstall_cmds=$lt_postuninstall_cmds
+
+# Commands to strip libraries.
+old_striplib=$lt_old_striplib
+striplib=$lt_striplib
+
+# Method to check whether dependent libraries are shared objects.
+deplibs_check_method=$lt_deplibs_check_method
+
+# Command to use when deplibs_check_method == file_magic.
+file_magic_cmd=$lt_file_magic_cmd
+
+# Flag that allows shared libraries with undefined symbols to be built.
+allow_undefined_flag=$lt_allow_undefined_flag
+
+# Flag that forces no undefined symbols.
+no_undefined_flag=$lt_no_undefined_flag
+
+# Commands used to finish a libtool library installation in a directory.
+finish_cmds=$lt_finish_cmds
+
+# Same as above, but a single script fragment to be evaled but not shown.
+finish_eval=$lt_finish_eval
+
+# Take the output of nm and produce a listing of raw symbols and C names.
+global_symbol_pipe=$lt_global_symbol_pipe
+
+# Transform the output of nm in a proper C declaration
+global_symbol_to_cdecl=$lt_global_symbol_to_cdecl
+
+# This is the shared library runtime path variable.
+runpath_var=$runpath_var
+
+# This is the shared library path variable.
+shlibpath_var=$shlibpath_var
+
+# Is shlibpath searched before the hard-coded library search path?
+shlibpath_overrides_runpath=$shlibpath_overrides_runpath
+
+# How to hardcode a shared library path into an executable.
+hardcode_action=$hardcode_action
+
+# Whether we should hardcode library paths into libraries.
+hardcode_into_libs=$hardcode_into_libs
+
+# Flag to hardcode \$libdir into a binary during linking.
+# This must work even if \$libdir does not exist.
+hardcode_libdir_flag_spec=$lt_hardcode_libdir_flag_spec
+
+# Whether we need a single -rpath flag with a separated argument.
+hardcode_libdir_separator=$lt_hardcode_libdir_separator
+
+# Set to yes if using DIR/libNAME.so during linking hardcodes DIR into the
+# resulting binary.
+hardcode_direct=$hardcode_direct
+
+# Set to yes if using the -LDIR flag during linking hardcodes DIR into the
+# resulting binary.
+hardcode_minus_L=$hardcode_minus_L
+
+# Set to yes if using SHLIBPATH_VAR=DIR during linking hardcodes DIR into
+# the resulting binary.
+hardcode_shlibpath_var=$hardcode_shlibpath_var
+
+# Variables whose values should be saved in libtool wrapper scripts and
+# restored at relink time.
+variables_saved_for_relink="$variables_saved_for_relink"
+
+# Whether libtool must link a program against all its dependency libraries.
+link_all_deplibs=$link_all_deplibs
+
+# Compile-time system search path for libraries
+sys_lib_search_path_spec=$lt_sys_lib_search_path_spec
+
+# Run-time system search path for libraries
+sys_lib_dlsearch_path_spec=$lt_sys_lib_dlsearch_path_spec
+
+# Fix the shell variable \$srcfile for the compiler.
+fix_srcfile_path="$fix_srcfile_path"
+
+# Set to yes if exported symbols are required.
+always_export_symbols=$always_export_symbols
+
+# The commands to list exported symbols.
+export_symbols_cmds=$lt_export_symbols_cmds
+
+# The commands to extract the exported symbol list from a shared archive.
+extract_expsyms_cmds=$lt_extract_expsyms_cmds
+
+# Symbols that should not be listed in the preloaded symbols.
+exclude_expsyms=$lt_exclude_expsyms
+
+# Symbols that must always be exported.
+include_expsyms=$lt_include_expsyms
+
+# ### END LIBTOOL CONFIG
+
+__EOF__
+
+  case $host_os in
+  aix3*)
+    cat <<\EOF >> "${ofile}T"
+
+# AIX sometimes has problems with the GCC collect2 program.  For some
+# reason, if we set the COLLECT_NAMES environment variable, the problems
+# vanish in a puff of smoke.
+if test "X${COLLECT_NAMES+set}" != Xset; then
+  COLLECT_NAMES=
+  export COLLECT_NAMES
+fi
+EOF
+    ;;
+  esac
+
+  case $host_os in
+  cygwin* | mingw* | pw32* | os2*)
+    cat <<'EOF' >> "${ofile}T"
+      # This is a source program that is used to create dlls on Windows
+      # Don't remove nor modify the starting and closing comments
+# /* ltdll.c starts here */
+# #define WIN32_LEAN_AND_MEAN
+# #include <windows.h>
+# #undef WIN32_LEAN_AND_MEAN
+# #include <stdio.h>
+#
+# #ifndef __CYGWIN__
+# #  ifdef __CYGWIN32__
+# #    define __CYGWIN__ __CYGWIN32__
+# #  endif
+# #endif
+#
+# #ifdef __cplusplus
+# extern "C" {
+# #endif
+# BOOL APIENTRY DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved);
+# #ifdef __cplusplus
+# }
+# #endif
+#
+# #ifdef __CYGWIN__
+# #include <cygwin/cygwin_dll.h>
+# DECLARE_CYGWIN_DLL( DllMain );
+# #endif
+# HINSTANCE __hDllInstance_base;
+#
+# BOOL APIENTRY
+# DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
+# {
+#   __hDllInstance_base = hInst;
+#   return TRUE;
+# }
+# /* ltdll.c ends here */
+        # This is a source program that is used to create import libraries
+        # on Windows for dlls which lack them. Don't remove nor modify the
+        # starting and closing comments
+# /* impgen.c starts here */
+# /*   Copyright (C) 1999-2000 Free Software Foundation, Inc.
+#
+#  This file is part of GNU libtool.
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#  */
+#
+# #include <stdio.h>		/* for printf() */
+# #include <unistd.h>		/* for open(), lseek(), read() */
+# #include <fcntl.h>		/* for O_RDONLY, O_BINARY */
+# #include <string.h>		/* for strdup() */
+#
+# /* O_BINARY isn't required (or even defined sometimes) under Unix */
+# #ifndef O_BINARY
+# #define O_BINARY 0
+# #endif
+#
+# static unsigned int
+# pe_get16 (fd, offset)
+#      int fd;
+#      int offset;
+# {
+#   unsigned char b[2];
+#   lseek (fd, offset, SEEK_SET);
+#   read (fd, b, 2);
+#   return b[0] + (b[1]<<8);
+# }
+#
+# static unsigned int
+# pe_get32 (fd, offset)
+#     int fd;
+#     int offset;
+# {
+#   unsigned char b[4];
+#   lseek (fd, offset, SEEK_SET);
+#   read (fd, b, 4);
+#   return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24);
+# }
+#
+# static unsigned int
+# pe_as32 (ptr)
+#      void *ptr;
+# {
+#   unsigned char *b = ptr;
+#   return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24);
+# }
+#
+# int
+# main (argc, argv)
+#     int argc;
+#     char *argv[];
+# {
+#     int dll;
+#     unsigned long pe_header_offset, opthdr_ofs, num_entries, i;
+#     unsigned long export_rva, export_size, nsections, secptr, expptr;
+#     unsigned long name_rvas, nexp;
+#     unsigned char *expdata, *erva;
+#     char *filename, *dll_name;
+#
+#     filename = argv[1];
+#
+#     dll = open(filename, O_RDONLY|O_BINARY);
+#     if (dll < 1)
+# 	return 1;
+#
+#     dll_name = filename;
+#
+#     for (i=0; filename[i]; i++)
+# 	if (filename[i] == '/' || filename[i] == '\\'  || filename[i] == ':')
+# 	    dll_name = filename + i +1;
+#
+#     pe_header_offset = pe_get32 (dll, 0x3c);
+#     opthdr_ofs = pe_header_offset + 4 + 20;
+#     num_entries = pe_get32 (dll, opthdr_ofs + 92);
+#
+#     if (num_entries < 1) /* no exports */
+# 	return 1;
+#
+#     export_rva = pe_get32 (dll, opthdr_ofs + 96);
+#     export_size = pe_get32 (dll, opthdr_ofs + 100);
+#     nsections = pe_get16 (dll, pe_header_offset + 4 +2);
+#     secptr = (pe_header_offset + 4 + 20 +
+# 	      pe_get16 (dll, pe_header_offset + 4 + 16));
+#
+#     expptr = 0;
+#     for (i = 0; i < nsections; i++)
+#     {
+# 	char sname[8];
+# 	unsigned long secptr1 = secptr + 40 * i;
+# 	unsigned long vaddr = pe_get32 (dll, secptr1 + 12);
+# 	unsigned long vsize = pe_get32 (dll, secptr1 + 16);
+# 	unsigned long fptr = pe_get32 (dll, secptr1 + 20);
+# 	lseek(dll, secptr1, SEEK_SET);
+# 	read(dll, sname, 8);
+# 	if (vaddr <= export_rva && vaddr+vsize > export_rva)
+# 	{
+# 	    expptr = fptr + (export_rva - vaddr);
+# 	    if (export_rva + export_size > vaddr + vsize)
+# 		export_size = vsize - (export_rva - vaddr);
+# 	    break;
+# 	}
+#     }
+#
+#     expdata = (unsigned char*)malloc(export_size);
+#     lseek (dll, expptr, SEEK_SET);
+#     read (dll, expdata, export_size);
+#     erva = expdata - export_rva;
+#
+#     nexp = pe_as32 (expdata+24);
+#     name_rvas = pe_as32 (expdata+32);
+#
+#     printf ("EXPORTS\n");
+#     for (i = 0; i<nexp; i++)
+#     {
+# 	unsigned long name_rva = pe_as32 (erva+name_rvas+i*4);
+# 	printf ("\t%s @ %ld ;\n", erva+name_rva, 1+ i);
+#     }
+#
+#     return 0;
+# }
+# /* impgen.c ends here */
+
+EOF
+    ;;
+  esac
+
+  # We use sed instead of cat because bash on DJGPP gets confused if
+  # if finds mixed CR/LF and LF-only lines.  Since sed operates in
+  # text mode, it properly converts lines to CR/LF.  This bash problem
+  # is reportedly fixed, but why not run on old versions too?
+  sed '$q' "$ltmain" >> "${ofile}T" || (rm -f "${ofile}T"; exit 1)
+
+  mv -f "${ofile}T" "$ofile" || \
+    (rm -f "$ofile" && cp "${ofile}T" "$ofile" && rm -f "${ofile}T")
+  chmod +x "$ofile"
+fi
+##
+## END FIXME
+
+
+
+
+
+# This can be used to rebuild libtool when needed
+LIBTOOL_DEPS="$ac_aux_dir/ltmain.sh"
+
+# Always use our own libtool.
+LIBTOOL='$(SHELL) $(top_builddir)/libtool'
+
+# Prevent multiple expansion
+
+
+
+
+CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}
+CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}
+BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}
+BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}
+
+
+echo "$as_me:$LINENO: checking for ANSI C header files" >&5
+echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
+if test "${ac_cv_header_stdc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_header_stdc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_header_stdc=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then
+  :
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then
+  :
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ctype.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+                   (('a' <= (c) && (c) <= 'i') \
+                     || ('j' <= (c) && (c) <= 'r') \
+                     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+        || toupper (i) != TOUPPER (i))
+      exit(2);
+  exit (0);
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+ac_cv_header_stdc=no
+fi
+rm -f core core.* *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
+echo "${ECHO_T}$ac_cv_header_stdc" >&6
+if test $ac_cv_header_stdc = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define STDC_HEADERS 1
+_ACEOF
+
+fi
+
+
+for ac_header in limits.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------ ##
+## Report this to bug-autoconf@gnu.org. ##
+## ------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
+echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5
+echo $ECHO_N "checking for an ANSI C-conforming const... $ECHO_C" >&6
+if test "${ac_cv_c_const+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+/* FIXME: Include the comments suggested by Paul. */
+#ifndef __cplusplus
+  /* Ultrix mips cc rejects this.  */
+  typedef int charset[2];
+  const charset x;
+  /* SunOS 4.1.1 cc rejects this.  */
+  char const *const *ccp;
+  char **p;
+  /* NEC SVR4.0.2 mips cc rejects this.  */
+  struct point {int x, y;};
+  static struct point const zero = {0,0};
+  /* AIX XL C 1.02.0.0 rejects this.
+     It does not let you subtract one const X* pointer from another in
+     an arm of an if-expression whose if-part is not a constant
+     expression */
+  const char *g = "string";
+  ccp = &g + (g ? g-g : 0);
+  /* HPUX 7.0 cc rejects these. */
+  ++ccp;
+  p = (char**) ccp;
+  ccp = (char const *const *) p;
+  { /* SCO 3.2v4 cc rejects this.  */
+    char *t;
+    char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+    *t++ = 0;
+  }
+  { /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
+    int x[] = {25, 17};
+    const int *foo = &x[0];
+    ++foo;
+  }
+  { /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+    typedef const int *iptr;
+    iptr p = 0;
+    ++p;
+  }
+  { /* AIX XL C 1.02.0.0 rejects this saying
+       "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+    struct s { int j; const int *ap[3]; };
+    struct s *b; b->j = 5;
+  }
+  { /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+    const int foo = 10;
+  }
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_c_const=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_c_const=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_c_const" >&5
+echo "${ECHO_T}$ac_cv_c_const" >&6
+if test $ac_cv_c_const = no; then
+
+cat >>confdefs.h <<\_ACEOF
+#define const
+_ACEOF
+
+fi
+
+echo "$as_me:$LINENO: checking for size_t" >&5
+echo $ECHO_N "checking for size_t... $ECHO_C" >&6
+if test "${ac_cv_type_size_t+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main ()
+{
+if ((size_t *) 0)
+  return 0;
+if (sizeof (size_t))
+  return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_type_size_t=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_type_size_t=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_type_size_t" >&5
+echo "${ECHO_T}$ac_cv_type_size_t" >&6
+if test $ac_cv_type_size_t = yes; then
+  :
+else
+
+cat >>confdefs.h <<_ACEOF
+#define size_t unsigned
+_ACEOF
+
+fi
+
+
+
+
+
+
+for ac_func in bcopy memmove strerror
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
+if eval "test \"\${$as_ac_var+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+char (*f) () = $ac_func;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != $ac_func;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+eval "$as_ac_var=no"
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+
+# Check whether --enable-utf8 or --disable-utf8 was given.
+if test "${enable_utf8+set}" = set; then
+  enableval="$enable_utf8"
+  if test "$enableval" = "yes"; then
+  UTF8=-DSUPPORT_UTF8
+fi
+
+fi;
+
+
+# Check whether --enable-newline-is-cr or --disable-newline-is-cr was given.
+if test "${enable_newline_is_cr+set}" = set; then
+  enableval="$enable_newline_is_cr"
+  if test "$enableval" = "yes"; then
+  NEWLINE=-DNEWLINE=13
+fi
+
+fi;
+
+
+# Check whether --enable-newline-is-lf or --disable-newline-is-lf was given.
+if test "${enable_newline_is_lf+set}" = set; then
+  enableval="$enable_newline_is_lf"
+  if test "$enableval" = "yes"; then
+  NEWLINE=-DNEWLINE=10
+fi
+
+fi;
+
+
+# Check whether --enable-ebcdic or --disable-ebcdic was given.
+if test "${enable_ebcdic+set}" = set; then
+  enableval="$enable_ebcdic"
+  if test "$enableval" == "yes"; then
+  EBCDIC=-DEBCDIC=1
+fi
+
+fi;
+
+# Check whether --enable-recursion or --disable-recursion was given.
+if test "${enable_recursion+set}" = set; then
+  enableval="$enable_recursion"
+  if test "$enableval" = "no"; then
+  NO_RECURSE=-DNO_RECURSE
+fi
+
+fi;
+
+
+
+
+# Check whether --with-posix-malloc-threshold or --without-posix-malloc-threshold was given.
+if test "${with_posix_malloc_threshold+set}" = set; then
+  withval="$with_posix_malloc_threshold"
+  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval
+
+fi;
+
+
+
+# Check whether --with-link-size or --without-link-size was given.
+if test "${with_link_size+set}" = set; then
+  withval="$with_link_size"
+  LINK_SIZE=-DLINK_SIZE=$withval
+
+fi;
+
+
+
+# Check whether --with-match-limit or --without-match-limit was given.
+if test "${with_match_limit+set}" = set; then
+  withval="$with_match_limit"
+  MATCH_LIMIT=-DMATCH_LIMIT=$withval
+
+fi;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+case $host_os in
+mingw* )
+    POSIX_OBJ=pcreposix.o
+    POSIX_LOBJ=pcreposix.lo
+    POSIX_LIB=
+    ON_WINDOWS=
+    NOT_ON_WINDOWS="#"
+    WIN_PREFIX=
+    ;;
+* )
+    ON_WINDOWS="#"
+    NOT_ON_WINDOWS=
+    POSIX_OBJ=
+    POSIX_LOBJ=
+    POSIX_LIB=libpcreposix.la
+    WIN_PREFIX=
+    ;;
+esac
+
+
+
+
+
+
+
+if test "x$enable_shared" = "xno" ; then
+
+cat >>confdefs.h <<\_ACEOF
+#define PCRE_STATIC 1
+_ACEOF
+
+fi
+
+                                        ac_config_files="$ac_config_files Makefile pcre.h:pcre.in pcre-config:pcre-config.in RunTest:RunTest.in"
+          ac_config_commands="$ac_config_commands default"
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, don't put newlines in cache variables' values.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+{
+  (set) 2>&1 |
+    case `(ac_space=' '; set | grep ac_space) 2>&1` in
+    *ac_space=\ *)
+      # `set' does not quote correctly, so add quotes (double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \).
+      sed -n \
+        "s/'/'\\\\''/g;
+    	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;;
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n \
+        "s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p"
+      ;;
+    esac;
+} |
+  sed '
+     t clear
+     : clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+     t end
+     /^ac_cv_env/!s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     : end' >>confcache
+if diff $cache_file confcache >/dev/null 2>&1; then :; else
+  if test -w $cache_file; then
+    test "x$cache_file" != "x/dev/null" && echo "updating cache $cache_file"
+    cat confcache >$cache_file
+  else
+    echo "not updating unwritable cache $cache_file"
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+# VPATH may cause trouble with some makes, so we remove $(srcdir),
+# ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[ 	]*VPATH[ 	]*=/{
+s/:*\$(srcdir):*/:/;
+s/:*\${srcdir}:*/:/;
+s/:*@srcdir@:*/:/;
+s/^\([^=]*=[ 	]*\):*/\1/;
+s/:*$//;
+s/^[^=]*=[ 	]*$//;
+}'
+fi
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_i=`echo "$ac_i" |
+         sed 's/\$U\././;s/\.o$//;s/\.obj$//'`
+  # 2. Add them.
+  ac_libobjs="$ac_libobjs $ac_i\$U.$ac_objext"
+  ac_ltlibobjs="$ac_ltlibobjs $ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+
+: ${CONFIG_STATUS=./config.status}
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ echo "$as_me:$LINENO: creating $CONFIG_STATUS" >&5
+echo "$as_me: creating $CONFIG_STATUS" >&6;}
+cat >$CONFIG_STATUS <<_ACEOF
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+SHELL=\${CONFIG_SHELL-$SHELL}
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+## --------------------- ##
+## M4sh Initialization.  ##
+## --------------------- ##
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
+  set -o posix
+fi
+
+# Support unset when possible.
+if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+
+# Work around bugs in pre-3.0 UWIN ksh.
+$as_unset ENV MAIL MAILPATH
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+for as_var in \
+  LANG LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE LC_IDENTIFICATION \
+  LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER \
+  LC_TELEPHONE LC_TIME
+do
+  if (set +x; test -n "`(eval $as_var=C; export $as_var) 2>&1`"); then
+    eval $as_var=C; export $as_var
+  else
+    $as_unset $as_var
+  fi
+done
+
+# Required to use basename.
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename /) >/dev/null 2>&1 && test "X`basename / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+
+# Name of the executable.
+as_me=`$as_basename "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)$' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{ s//\1/; q; }
+  	  /^X\/\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\/\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+
+
+# PATH needs CR, and LINENO needs CR and PATH.
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  echo "#! /bin/sh" >conf$$.sh
+  echo  "exit 0"   >>conf$$.sh
+  chmod +x conf$$.sh
+  if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
+    PATH_SEPARATOR=';'
+  else
+    PATH_SEPARATOR=:
+  fi
+  rm -f conf$$.sh
+fi
+
+
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2"  || {
+  # Find who we are.  Look in the path if we contain no path at all
+  # relative or not.
+  case $0 in
+    *[\\/]* ) as_myself=$0 ;;
+    *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+done
+
+       ;;
+  esac
+  # We did not find ourselves, most probably we were run as `sh COMMAND'
+  # in which case we are not to be found in the path.
+  if test "x$as_myself" = x; then
+    as_myself=$0
+  fi
+  if test ! -f "$as_myself"; then
+    { { echo "$as_me:$LINENO: error: cannot find myself; rerun with an absolute path" >&5
+echo "$as_me: error: cannot find myself; rerun with an absolute path" >&2;}
+   { (exit 1); exit 1; }; }
+  fi
+  case $CONFIG_SHELL in
+  '')
+    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for as_base in sh bash ksh sh5; do
+	 case $as_dir in
+	 /*)
+	   if ("$as_dir/$as_base" -c '
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2" ') 2>/dev/null; then
+	     $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { BASH_ENV=; export BASH_ENV; }
+	     $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; }
+	     CONFIG_SHELL=$as_dir/$as_base
+	     export CONFIG_SHELL
+	     exec "$CONFIG_SHELL" "$0" ${1+"$@"}
+	   fi;;
+	 esac
+       done
+done
+;;
+  esac
+
+  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
+  # uniformly replaced by the line number.  The first 'sed' inserts a
+  # line-number line before each line; the second 'sed' does the real
+  # work.  The second script uses 'N' to pair each line-number line
+  # with the numbered line, and appends trailing '-' during
+  # substitution so that $LINENO is not a special case at line end.
+  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
+  # second 'sed' script.  Blame Lee E. McMahon for sed's syntax.  :-)
+  sed '=' <$as_myself |
+    sed '
+      N
+      s,$,-,
+      : loop
+      s,^\(['$as_cr_digits']*\)\(.*\)[$]LINENO\([^'$as_cr_alnum'_]\),\1\2\1\3,
+      t loop
+      s,-$,,
+      s,^['$as_cr_digits']*\n,,
+    ' >$as_me.lineno &&
+  chmod +x $as_me.lineno ||
+    { { echo "$as_me:$LINENO: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&5
+echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2;}
+   { (exit 1); exit 1; }; }
+
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensible to this).
+  . ./$as_me.lineno
+  # Exit status is that of the last command.
+  exit
+}
+
+
+case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
+  *c*,-n*) ECHO_N= ECHO_C='
+' ECHO_T='	' ;;
+  *c*,*  ) ECHO_N=-n ECHO_C= ECHO_T= ;;
+  *)       ECHO_N= ECHO_C='\c' ECHO_T= ;;
+esac
+
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+rm -f conf$$ conf$$.exe conf$$.file
+echo >conf$$.file
+if ln -s conf$$.file conf$$ 2>/dev/null; then
+  # We could just check for DJGPP; but this test a) works b) is more generic
+  # and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
+  if test -f conf$$.exe; then
+    # Don't use ln at all; we don't have any links
+    as_ln_s='cp -p'
+  else
+    as_ln_s='ln -s'
+  fi
+elif ln conf$$.file conf$$ 2>/dev/null; then
+  as_ln_s=ln
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.file
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p=:
+else
+  as_mkdir_p=false
+fi
+
+as_executable_p="test -f"
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="sed y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="sed y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.
+as_nl='
+'
+IFS=" 	$as_nl"
+
+# CDPATH.
+$as_unset CDPATH
+
+exec 6>&1
+
+# Open the log real soon, to keep \$[0] and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.  Logging --version etc. is OK.
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+} >&5
+cat >&5 <<_CSEOF
+
+This file was extended by $as_me, which was
+generated by GNU Autoconf 2.57.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+_CSEOF
+echo "on `(hostname || uname -n) 2>/dev/null | sed 1q`" >&5
+echo >&5
+_ACEOF
+
+# Files that config.status was made for.
+if test -n "$ac_config_files"; then
+  echo "config_files=\"$ac_config_files\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_headers"; then
+  echo "config_headers=\"$ac_config_headers\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_links"; then
+  echo "config_links=\"$ac_config_links\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_commands"; then
+  echo "config_commands=\"$ac_config_commands\"" >>$CONFIG_STATUS
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+ac_cs_usage="\
+\`$as_me' instantiates files from templates according to the
+current configuration.
+
+Usage: $0 [OPTIONS] [FILE]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number, then exit
+  -q, --quiet      do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+  --file=FILE[:TEMPLATE]
+                   instantiate the configuration file FILE
+  --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Configuration commands:
+$config_commands
+
+Report bugs to <bug-autoconf@gnu.org>."
+_ACEOF
+
+cat >>$CONFIG_STATUS <<_ACEOF
+ac_cs_version="\\
+config.status
+configured by $0, generated by GNU Autoconf 2.57,
+  with options \\"`echo "$ac_configure_args" | sed 's/[\\""\`\$]/\\\\&/g'`\\"
+
+Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
+Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+srcdir=$srcdir
+INSTALL="$INSTALL"
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+# If no file are specified by the user, then we need to provide default
+# value.  By we need to know if files were specified by the user.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=*)
+    ac_option=`expr "x$1" : 'x\([^=]*\)='`
+    ac_optarg=`expr "x$1" : 'x[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  -*)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  *) # This is not an option, so the user has probably given explicit
+     # arguments.
+     ac_option=$1
+     ac_need_defaults=false;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --vers* | -V )
+    echo "$ac_cs_version"; exit 0 ;;
+  --he | --h)
+    # Conflict between --help and --header
+    { { echo "$as_me:$LINENO: error: ambiguous option: $1
+Try \`$0 --help' for more information." >&5
+echo "$as_me: error: ambiguous option: $1
+Try \`$0 --help' for more information." >&2;}
+   { (exit 1); exit 1; }; };;
+  --help | --hel | -h )
+    echo "$ac_cs_usage"; exit 0 ;;
+  --debug | --d* | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    CONFIG_FILES="$CONFIG_FILES $ac_optarg"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    CONFIG_HEADERS="$CONFIG_HEADERS $ac_optarg"
+    ac_need_defaults=false;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) { { echo "$as_me:$LINENO: error: unrecognized option: $1
+Try \`$0 --help' for more information." >&5
+echo "$as_me: error: unrecognized option: $1
+Try \`$0 --help' for more information." >&2;}
+   { (exit 1); exit 1; }; } ;;
+
+  *) ac_config_targets="$ac_config_targets $1" ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF
+if \$ac_cs_recheck; then
+  echo "running $SHELL $0 " $ac_configure_args \$ac_configure_extra_args " --no-create --no-recursion" >&6
+  exec $SHELL $0 $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+fi
+
+_ACEOF
+
+
+
+
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+for ac_config_target in $ac_config_targets
+do
+  case "$ac_config_target" in
+  # Handling of arguments.
+  "Makefile" ) CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+  "pcre.h" ) CONFIG_FILES="$CONFIG_FILES pcre.h:pcre.in" ;;
+  "pcre-config" ) CONFIG_FILES="$CONFIG_FILES pcre-config:pcre-config.in" ;;
+  "RunTest" ) CONFIG_FILES="$CONFIG_FILES RunTest:RunTest.in" ;;
+  "default" ) CONFIG_COMMANDS="$CONFIG_COMMANDS default" ;;
+  "config.h" ) CONFIG_HEADERS="$CONFIG_HEADERS config.h:config.in" ;;
+  *) { { echo "$as_me:$LINENO: error: invalid argument: $ac_config_target" >&5
+echo "$as_me: error: invalid argument: $ac_config_target" >&2;}
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+  test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
+  test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason to put it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Create a temporary directory, and hook for its removal unless debugging.
+$debug ||
+{
+  trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0
+  trap '{ (exit 1); exit 1; }' 1 2 13 15
+}
+
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d -q "./confstatXXXXXX") 2>/dev/null` &&
+  test -n "$tmp" && test -d "$tmp"
+}  ||
+{
+  tmp=./confstat$$-$RANDOM
+  (umask 077 && mkdir $tmp)
+} ||
+{
+   echo "$me: cannot create a temporary directory in ." >&2
+   { (exit 1); exit 1; }
+}
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<_ACEOF
+
+#
+# CONFIG_FILES section.
+#
+
+# No need to generate the scripts if there are no CONFIG_FILES.
+# This happens for instance when ./config.status config.h
+if test -n "\$CONFIG_FILES"; then
+  # Protect against being on the right side of a sed subst in config.status.
+  sed 's/,@/@@/; s/@,/@@/; s/,;t t\$/@;t t/; /@;t t\$/s/[\\\\&,]/\\\\&/g;
+   s/@@/,@/; s/@@/@,/; s/@;t t\$/,;t t/' >\$tmp/subs.sed <<\\CEOF
+s,@SHELL@,$SHELL,;t t
+s,@PATH_SEPARATOR@,$PATH_SEPARATOR,;t t
+s,@PACKAGE_NAME@,$PACKAGE_NAME,;t t
+s,@PACKAGE_TARNAME@,$PACKAGE_TARNAME,;t t
+s,@PACKAGE_VERSION@,$PACKAGE_VERSION,;t t
+s,@PACKAGE_STRING@,$PACKAGE_STRING,;t t
+s,@PACKAGE_BUGREPORT@,$PACKAGE_BUGREPORT,;t t
+s,@exec_prefix@,$exec_prefix,;t t
+s,@prefix@,$prefix,;t t
+s,@program_transform_name@,$program_transform_name,;t t
+s,@bindir@,$bindir,;t t
+s,@sbindir@,$sbindir,;t t
+s,@libexecdir@,$libexecdir,;t t
+s,@datadir@,$datadir,;t t
+s,@sysconfdir@,$sysconfdir,;t t
+s,@sharedstatedir@,$sharedstatedir,;t t
+s,@localstatedir@,$localstatedir,;t t
+s,@libdir@,$libdir,;t t
+s,@includedir@,$includedir,;t t
+s,@oldincludedir@,$oldincludedir,;t t
+s,@infodir@,$infodir,;t t
+s,@mandir@,$mandir,;t t
+s,@build_alias@,$build_alias,;t t
+s,@host_alias@,$host_alias,;t t
+s,@target_alias@,$target_alias,;t t
+s,@DEFS@,$DEFS,;t t
+s,@ECHO_C@,$ECHO_C,;t t
+s,@ECHO_N@,$ECHO_N,;t t
+s,@ECHO_T@,$ECHO_T,;t t
+s,@LIBS@,$LIBS,;t t
+s,@CC@,$CC,;t t
+s,@CFLAGS@,$CFLAGS,;t t
+s,@LDFLAGS@,$LDFLAGS,;t t
+s,@CPPFLAGS@,$CPPFLAGS,;t t
+s,@ac_ct_CC@,$ac_ct_CC,;t t
+s,@EXEEXT@,$EXEEXT,;t t
+s,@OBJEXT@,$OBJEXT,;t t
+s,@INSTALL_PROGRAM@,$INSTALL_PROGRAM,;t t
+s,@INSTALL_SCRIPT@,$INSTALL_SCRIPT,;t t
+s,@INSTALL_DATA@,$INSTALL_DATA,;t t
+s,@build@,$build,;t t
+s,@build_cpu@,$build_cpu,;t t
+s,@build_vendor@,$build_vendor,;t t
+s,@build_os@,$build_os,;t t
+s,@host@,$host,;t t
+s,@host_cpu@,$host_cpu,;t t
+s,@host_vendor@,$host_vendor,;t t
+s,@host_os@,$host_os,;t t
+s,@LN_S@,$LN_S,;t t
+s,@ECHO@,$ECHO,;t t
+s,@RANLIB@,$RANLIB,;t t
+s,@ac_ct_RANLIB@,$ac_ct_RANLIB,;t t
+s,@STRIP@,$STRIP,;t t
+s,@ac_ct_STRIP@,$ac_ct_STRIP,;t t
+s,@CPP@,$CPP,;t t
+s,@EGREP@,$EGREP,;t t
+s,@LIBTOOL@,$LIBTOOL,;t t
+s,@BUILD_EXEEXT@,$BUILD_EXEEXT,;t t
+s,@BUILD_OBJEXT@,$BUILD_OBJEXT,;t t
+s,@CC_FOR_BUILD@,$CC_FOR_BUILD,;t t
+s,@CFLAGS_FOR_BUILD@,$CFLAGS_FOR_BUILD,;t t
+s,@EBCDIC@,$EBCDIC,;t t
+s,@HAVE_MEMMOVE@,$HAVE_MEMMOVE,;t t
+s,@HAVE_STRERROR@,$HAVE_STRERROR,;t t
+s,@LINK_SIZE@,$LINK_SIZE,;t t
+s,@MATCH_LIMIT@,$MATCH_LIMIT,;t t
+s,@NEWLINE@,$NEWLINE,;t t
+s,@NO_RECURSE@,$NO_RECURSE,;t t
+s,@PCRE_MAJOR@,$PCRE_MAJOR,;t t
+s,@PCRE_MINOR@,$PCRE_MINOR,;t t
+s,@PCRE_DATE@,$PCRE_DATE,;t t
+s,@PCRE_VERSION@,$PCRE_VERSION,;t t
+s,@PCRE_LIB_VERSION@,$PCRE_LIB_VERSION,;t t
+s,@PCRE_POSIXLIB_VERSION@,$PCRE_POSIXLIB_VERSION,;t t
+s,@POSIX_MALLOC_THRESHOLD@,$POSIX_MALLOC_THRESHOLD,;t t
+s,@UTF8@,$UTF8,;t t
+s,@WIN_PREFIX@,$WIN_PREFIX,;t t
+s,@ON_WINDOWS@,$ON_WINDOWS,;t t
+s,@NOT_ON_WINDOWS@,$NOT_ON_WINDOWS,;t t
+s,@POSIX_OBJ@,$POSIX_OBJ,;t t
+s,@POSIX_LOBJ@,$POSIX_LOBJ,;t t
+s,@POSIX_LIB@,$POSIX_LIB,;t t
+s,@LIBOBJS@,$LIBOBJS,;t t
+s,@LTLIBOBJS@,$LTLIBOBJS,;t t
+CEOF
+
+_ACEOF
+
+  cat >>$CONFIG_STATUS <<\_ACEOF
+  # Split the substitutions into bite-sized pieces for seds with
+  # small command number limits, like on Digital OSF/1 and HP-UX.
+  ac_max_sed_lines=48
+  ac_sed_frag=1 # Number of current file.
+  ac_beg=1 # First line for current file.
+  ac_end=$ac_max_sed_lines # Line after last line for current file.
+  ac_more_lines=:
+  ac_sed_cmds=
+  while $ac_more_lines; do
+    if test $ac_beg -gt 1; then
+      sed "1,${ac_beg}d; ${ac_end}q" $tmp/subs.sed >$tmp/subs.frag
+    else
+      sed "${ac_end}q" $tmp/subs.sed >$tmp/subs.frag
+    fi
+    if test ! -s $tmp/subs.frag; then
+      ac_more_lines=false
+    else
+      # The purpose of the label and of the branching condition is to
+      # speed up the sed processing (if there are no `@' at all, there
+      # is no need to browse any of the substitutions).
+      # These are the two extra sed commands mentioned above.
+      (echo ':t
+  /@[a-zA-Z_][a-zA-Z_0-9]*@/!b' && cat $tmp/subs.frag) >$tmp/subs-$ac_sed_frag.sed
+      if test -z "$ac_sed_cmds"; then
+  	ac_sed_cmds="sed -f $tmp/subs-$ac_sed_frag.sed"
+      else
+  	ac_sed_cmds="$ac_sed_cmds | sed -f $tmp/subs-$ac_sed_frag.sed"
+      fi
+      ac_sed_frag=`expr $ac_sed_frag + 1`
+      ac_beg=$ac_end
+      ac_end=`expr $ac_end + $ac_max_sed_lines`
+    fi
+  done
+  if test -z "$ac_sed_cmds"; then
+    ac_sed_cmds=cat
+  fi
+fi # test -n "$CONFIG_FILES"
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+for ac_file in : $CONFIG_FILES; do test "x$ac_file" = x: && continue
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case $ac_file in
+  - | *:- | *:-:* ) # input from stdin
+        cat >$tmp/stdin
+        ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+        ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  *:* ) ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+        ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  * )   ac_file_in=$ac_file.in ;;
+  esac
+
+  # Compute @srcdir@, @top_srcdir@, and @INSTALL@ for subdirectories.
+  ac_dir=`(dirname "$ac_file") 2>/dev/null ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$ac_file" : 'X\(//\)[^/]' \| \
+         X"$ac_file" : 'X\(//\)$' \| \
+         X"$ac_file" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+  { if $as_mkdir_p; then
+    mkdir -p "$ac_dir"
+  else
+    as_dir="$ac_dir"
+    as_dirs=
+    while test ! -d "$as_dir"; do
+      as_dirs="$as_dir $as_dirs"
+      as_dir=`(dirname "$as_dir") 2>/dev/null ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$as_dir" : 'X\(//\)[^/]' \| \
+         X"$as_dir" : 'X\(//\)$' \| \
+         X"$as_dir" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+    done
+    test ! -n "$as_dirs" || mkdir $as_dirs
+  fi || { { echo "$as_me:$LINENO: error: cannot create directory \"$ac_dir\"" >&5
+echo "$as_me: error: cannot create directory \"$ac_dir\"" >&2;}
+   { (exit 1); exit 1; }; }; }
+
+  ac_builddir=.
+
+if test "$ac_dir" != .; then
+  ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'`
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'`
+else
+  ac_dir_suffix= ac_top_builddir=
+fi
+
+case $srcdir in
+  .)  # No --srcdir option.  We are building in place.
+    ac_srcdir=.
+    if test -z "$ac_top_builddir"; then
+       ac_top_srcdir=.
+    else
+       ac_top_srcdir=`echo $ac_top_builddir | sed 's,/$,,'`
+    fi ;;
+  [\\/]* | ?:[\\/]* )  # Absolute path.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir ;;
+  *) # Relative path.
+    ac_srcdir=$ac_top_builddir$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_builddir$srcdir ;;
+esac
+# Don't blindly perform a `cd "$ac_dir"/$ac_foo && pwd` since $ac_foo can be
+# absolute.
+ac_abs_builddir=`cd "$ac_dir" && cd $ac_builddir && pwd`
+ac_abs_top_builddir=`cd "$ac_dir" && cd ${ac_top_builddir}. && pwd`
+ac_abs_srcdir=`cd "$ac_dir" && cd $ac_srcdir && pwd`
+ac_abs_top_srcdir=`cd "$ac_dir" && cd $ac_top_srcdir && pwd`
+
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_builddir$INSTALL ;;
+  esac
+
+  if test x"$ac_file" != x-; then
+    { echo "$as_me:$LINENO: creating $ac_file" >&5
+echo "$as_me: creating $ac_file" >&6;}
+    rm -f "$ac_file"
+  fi
+  # Let's still pretend it is `configure' which instantiates (i.e., don't
+  # use $as_me), people would be surprised to read:
+  #    /* config.h.  Generated by config.status.  */
+  if test x"$ac_file" = x-; then
+    configure_input=
+  else
+    configure_input="$ac_file.  "
+  fi
+  configure_input=$configure_input"Generated from `echo $ac_file_in |
+                                     sed 's,.*/,,'` by configure."
+
+  # First look for the input files in the build tree, otherwise in the
+  # src tree.
+  ac_file_inputs=`IFS=:
+    for f in $ac_file_in; do
+      case $f in
+      -) echo $tmp/stdin ;;
+      [\\/$]*)
+         # Absolute (can't be DOS-style, as IFS=:)
+         test -f "$f" || { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+         echo $f;;
+      *) # Relative
+         if test -f "$f"; then
+           # Build tree
+           echo $f
+         elif test -f "$srcdir/$f"; then
+           # Source tree
+           echo $srcdir/$f
+         else
+           # /dev/null tree
+           { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+         fi;;
+      esac
+    done` || { (exit 1); exit 1; }
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF
+  sed "$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s,@configure_input@,$configure_input,;t t
+s,@srcdir@,$ac_srcdir,;t t
+s,@abs_srcdir@,$ac_abs_srcdir,;t t
+s,@top_srcdir@,$ac_top_srcdir,;t t
+s,@abs_top_srcdir@,$ac_abs_top_srcdir,;t t
+s,@builddir@,$ac_builddir,;t t
+s,@abs_builddir@,$ac_abs_builddir,;t t
+s,@top_builddir@,$ac_top_builddir,;t t
+s,@abs_top_builddir@,$ac_abs_top_builddir,;t t
+s,@INSTALL@,$ac_INSTALL,;t t
+" $ac_file_inputs | (eval "$ac_sed_cmds") >$tmp/out
+  rm -f $tmp/stdin
+  if test x"$ac_file" != x-; then
+    mv $tmp/out $ac_file
+  else
+    cat $tmp/out
+    rm -f $tmp/out
+  fi
+
+done
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+#
+# CONFIG_HEADER section.
+#
+
+# These sed commands are passed to sed as "A NAME B NAME C VALUE D", where
+# NAME is the cpp macro being defined and VALUE is the value it is being given.
+#
+# ac_d sets the value in "#define NAME VALUE" lines.
+ac_dA='s,^\([ 	]*\)#\([ 	]*define[ 	][ 	]*\)'
+ac_dB='[ 	].*$,\1#\2'
+ac_dC=' '
+ac_dD=',;t'
+# ac_u turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
+ac_uA='s,^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_uB='$,\1#\2define\3'
+ac_uC=' '
+ac_uD=',;t'
+
+for ac_file in : $CONFIG_HEADERS; do test "x$ac_file" = x: && continue
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case $ac_file in
+  - | *:- | *:-:* ) # input from stdin
+        cat >$tmp/stdin
+        ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+        ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  *:* ) ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+        ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  * )   ac_file_in=$ac_file.in ;;
+  esac
+
+  test x"$ac_file" != x- && { echo "$as_me:$LINENO: creating $ac_file" >&5
+echo "$as_me: creating $ac_file" >&6;}
+
+  # First look for the input files in the build tree, otherwise in the
+  # src tree.
+  ac_file_inputs=`IFS=:
+    for f in $ac_file_in; do
+      case $f in
+      -) echo $tmp/stdin ;;
+      [\\/$]*)
+         # Absolute (can't be DOS-style, as IFS=:)
+         test -f "$f" || { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+         echo $f;;
+      *) # Relative
+         if test -f "$f"; then
+           # Build tree
+           echo $f
+         elif test -f "$srcdir/$f"; then
+           # Source tree
+           echo $srcdir/$f
+         else
+           # /dev/null tree
+           { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+         fi;;
+      esac
+    done` || { (exit 1); exit 1; }
+  # Remove the trailing spaces.
+  sed 's/[ 	]*$//' $ac_file_inputs >$tmp/in
+
+_ACEOF
+
+# Transform confdefs.h into two sed scripts, `conftest.defines' and
+# `conftest.undefs', that substitutes the proper values into
+# config.h.in to produce config.h.  The first handles `#define'
+# templates, and the second `#undef' templates.
+# And first: Protect against being on the right side of a sed subst in
+# config.status.  Protect against being in an unquoted here document
+# in config.status.
+rm -f conftest.defines conftest.undefs
+# Using a here document instead of a string reduces the quoting nightmare.
+# Putting comments in sed scripts is not portable.
+#
+# `end' is used to avoid that the second main sed command (meant for
+# 0-ary CPP macros) applies to n-ary macro definitions.
+# See the Autoconf documentation for `clear'.
+cat >confdef2sed.sed <<\_ACEOF
+s/[\\&,]/\\&/g
+s,[\\$`],\\&,g
+t clear
+: clear
+s,^[ 	]*#[ 	]*define[ 	][ 	]*\([^ 	(][^ 	(]*\)\(([^)]*)\)[ 	]*\(.*\)$,${ac_dA}\1${ac_dB}\1\2${ac_dC}\3${ac_dD},gp
+t end
+s,^[ 	]*#[ 	]*define[ 	][ 	]*\([^ 	][^ 	]*\)[ 	]*\(.*\)$,${ac_dA}\1${ac_dB}\1${ac_dC}\2${ac_dD},gp
+: end
+_ACEOF
+# If some macros were called several times there might be several times
+# the same #defines, which is useless.  Nevertheless, we may not want to
+# sort them, since we want the *last* AC-DEFINE to be honored.
+uniq confdefs.h | sed -n -f confdef2sed.sed >conftest.defines
+sed 's/ac_d/ac_u/g' conftest.defines >conftest.undefs
+rm -f confdef2sed.sed
+
+# This sed command replaces #undef with comments.  This is necessary, for
+# example, in the case of _POSIX_SOURCE, which is predefined and required
+# on some systems where configure will not decide to define it.
+cat >>conftest.undefs <<\_ACEOF
+s,^[ 	]*#[ 	]*undef[ 	][ 	]*[a-zA-Z_][a-zA-Z_0-9]*,/* & */,
+_ACEOF
+
+# Break up conftest.defines because some shells have a limit on the size
+# of here documents, and old seds have small limits too (100 cmds).
+echo '  # Handle all the #define templates only if necessary.' >>$CONFIG_STATUS
+echo '  if grep "^[ 	]*#[ 	]*define" $tmp/in >/dev/null; then' >>$CONFIG_STATUS
+echo '  # If there are no defines, we may have an empty if/fi' >>$CONFIG_STATUS
+echo '  :' >>$CONFIG_STATUS
+rm -f conftest.tail
+while grep . conftest.defines >/dev/null
+do
+  # Write a limited-size here document to $tmp/defines.sed.
+  echo '  cat >$tmp/defines.sed <<CEOF' >>$CONFIG_STATUS
+  # Speed up: don't consider the non `#define' lines.
+  echo '/^[ 	]*#[ 	]*define/!b' >>$CONFIG_STATUS
+  # Work around the forget-to-reset-the-flag bug.
+  echo 't clr' >>$CONFIG_STATUS
+  echo ': clr' >>$CONFIG_STATUS
+  sed ${ac_max_here_lines}q conftest.defines >>$CONFIG_STATUS
+  echo 'CEOF
+  sed -f $tmp/defines.sed $tmp/in >$tmp/out
+  rm -f $tmp/in
+  mv $tmp/out $tmp/in
+' >>$CONFIG_STATUS
+  sed 1,${ac_max_here_lines}d conftest.defines >conftest.tail
+  rm -f conftest.defines
+  mv conftest.tail conftest.defines
+done
+rm -f conftest.defines
+echo '  fi # grep' >>$CONFIG_STATUS
+echo >>$CONFIG_STATUS
+
+# Break up conftest.undefs because some shells have a limit on the size
+# of here documents, and old seds have small limits too (100 cmds).
+echo '  # Handle all the #undef templates' >>$CONFIG_STATUS
+rm -f conftest.tail
+while grep . conftest.undefs >/dev/null
+do
+  # Write a limited-size here document to $tmp/undefs.sed.
+  echo '  cat >$tmp/undefs.sed <<CEOF' >>$CONFIG_STATUS
+  # Speed up: don't consider the non `#undef'
+  echo '/^[ 	]*#[ 	]*undef/!b' >>$CONFIG_STATUS
+  # Work around the forget-to-reset-the-flag bug.
+  echo 't clr' >>$CONFIG_STATUS
+  echo ': clr' >>$CONFIG_STATUS
+  sed ${ac_max_here_lines}q conftest.undefs >>$CONFIG_STATUS
+  echo 'CEOF
+  sed -f $tmp/undefs.sed $tmp/in >$tmp/out
+  rm -f $tmp/in
+  mv $tmp/out $tmp/in
+' >>$CONFIG_STATUS
+  sed 1,${ac_max_here_lines}d conftest.undefs >conftest.tail
+  rm -f conftest.undefs
+  mv conftest.tail conftest.undefs
+done
+rm -f conftest.undefs
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+  # Let's still pretend it is `configure' which instantiates (i.e., don't
+  # use $as_me), people would be surprised to read:
+  #    /* config.h.  Generated by config.status.  */
+  if test x"$ac_file" = x-; then
+    echo "/* Generated by configure.  */" >$tmp/config.h
+  else
+    echo "/* $ac_file.  Generated by configure.  */" >$tmp/config.h
+  fi
+  cat $tmp/in >>$tmp/config.h
+  rm -f $tmp/in
+  if test x"$ac_file" != x-; then
+    if diff $ac_file $tmp/config.h >/dev/null 2>&1; then
+      { echo "$as_me:$LINENO: $ac_file is unchanged" >&5
+echo "$as_me: $ac_file is unchanged" >&6;}
+    else
+      ac_dir=`(dirname "$ac_file") 2>/dev/null ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$ac_file" : 'X\(//\)[^/]' \| \
+         X"$ac_file" : 'X\(//\)$' \| \
+         X"$ac_file" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+      { if $as_mkdir_p; then
+    mkdir -p "$ac_dir"
+  else
+    as_dir="$ac_dir"
+    as_dirs=
+    while test ! -d "$as_dir"; do
+      as_dirs="$as_dir $as_dirs"
+      as_dir=`(dirname "$as_dir") 2>/dev/null ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$as_dir" : 'X\(//\)[^/]' \| \
+         X"$as_dir" : 'X\(//\)$' \| \
+         X"$as_dir" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+    done
+    test ! -n "$as_dirs" || mkdir $as_dirs
+  fi || { { echo "$as_me:$LINENO: error: cannot create directory \"$ac_dir\"" >&5
+echo "$as_me: error: cannot create directory \"$ac_dir\"" >&2;}
+   { (exit 1); exit 1; }; }; }
+
+      rm -f $ac_file
+      mv $tmp/config.h $ac_file
+    fi
+  else
+    cat $tmp/config.h
+    rm -f $tmp/config.h
+  fi
+done
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+#
+# CONFIG_COMMANDS section.
+#
+for ac_file in : $CONFIG_COMMANDS; do test "x$ac_file" = x: && continue
+  ac_dest=`echo "$ac_file" | sed 's,:.*,,'`
+  ac_source=`echo "$ac_file" | sed 's,[^:]*:,,'`
+  ac_dir=`(dirname "$ac_dest") 2>/dev/null ||
+$as_expr X"$ac_dest" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+         X"$ac_dest" : 'X\(//\)[^/]' \| \
+         X"$ac_dest" : 'X\(//\)$' \| \
+         X"$ac_dest" : 'X\(/\)' \| \
+         .     : '\(.\)' 2>/dev/null ||
+echo X"$ac_dest" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+  ac_builddir=.
+
+if test "$ac_dir" != .; then
+  ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'`
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'`
+else
+  ac_dir_suffix= ac_top_builddir=
+fi
+
+case $srcdir in
+  .)  # No --srcdir option.  We are building in place.
+    ac_srcdir=.
+    if test -z "$ac_top_builddir"; then
+       ac_top_srcdir=.
+    else
+       ac_top_srcdir=`echo $ac_top_builddir | sed 's,/$,,'`
+    fi ;;
+  [\\/]* | ?:[\\/]* )  # Absolute path.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir ;;
+  *) # Relative path.
+    ac_srcdir=$ac_top_builddir$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_builddir$srcdir ;;
+esac
+# Don't blindly perform a `cd "$ac_dir"/$ac_foo && pwd` since $ac_foo can be
+# absolute.
+ac_abs_builddir=`cd "$ac_dir" && cd $ac_builddir && pwd`
+ac_abs_top_builddir=`cd "$ac_dir" && cd ${ac_top_builddir}. && pwd`
+ac_abs_srcdir=`cd "$ac_dir" && cd $ac_srcdir && pwd`
+ac_abs_top_srcdir=`cd "$ac_dir" && cd $ac_top_srcdir && pwd`
+
+
+  { echo "$as_me:$LINENO: executing $ac_dest commands" >&5
+echo "$as_me: executing $ac_dest commands" >&6;}
+  case $ac_dest in
+    default ) chmod a+x RunTest pcre-config ;;
+  esac
+done
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+{ (exit 0); exit 0; }
+_ACEOF
+chmod +x $CONFIG_STATUS
+ac_clean_files=$ac_clean_files_save
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || { (exit 1); exit 1; }
+fi
+
diff --git a/external-libs/pcre/configure.in b/external-libs/pcre/configure.in
new file mode 100644
index 00000000..d32b301d
--- /dev/null
+++ b/external-libs/pcre/configure.in
@@ -0,0 +1,201 @@
+dnl Process this file with autoconf to produce a configure script.
+
+dnl This is required at the start; the name is the name of a file
+dnl it should be seeing, to verify it is in the same directory.
+
+AC_INIT(dftables.c)
+
+dnl A safety precaution
+
+AC_PREREQ(2.57)
+
+dnl Arrange to build config.h from config.in. Note that pcre.h is
+dnl built differently, as it is just a "substitution" file.
+dnl Manual says this macro should come right after AC_INIT.
+AC_CONFIG_HEADER(config.h:config.in)
+
+dnl Provide the current PCRE version information. Do not use numbers
+dnl with leading zeros for the minor version, as they end up in a C
+dnl macro, and may be treated as octal constants. Stick to single
+dnl digits for minor numbers less than 10. There are unlikely to be
+dnl that many releases anyway.
+
+PCRE_MAJOR=4
+PCRE_MINOR=5
+PCRE_DATE=01-December-2003
+PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}
+
+dnl Default values for miscellaneous macros
+
+POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10
+
+dnl Provide versioning information for libtool shared libraries that
+dnl are built by default on Unix systems.
+
+PCRE_LIB_VERSION=0:1:0
+PCRE_POSIXLIB_VERSION=0:0:0
+
+dnl Checks for programs.
+
+AC_PROG_CC
+AC_PROG_INSTALL
+AC_LIBTOOL_WIN32_DLL
+AC_PROG_LIBTOOL
+
+dnl We need to find a compiler for compiling a program to run on the local host
+dnl while building. It needs to be different from CC when cross-compiling.
+dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for
+dnl figuring this out automatically. Unfortunately, it does not work with the
+dnl latest versions of autoconf. So for the moment, we just default to the
+dnl same values as the "main" compiler. People who are corss-compiling will
+dnl just have to adjust the Makefile by hand or set these values when they
+dnl run "configure".
+
+CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}
+CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}
+BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}
+BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}
+
+dnl Checks for header files.
+
+AC_HEADER_STDC
+AC_CHECK_HEADERS(limits.h)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+
+AC_C_CONST
+AC_TYPE_SIZE_T
+
+dnl Checks for library functions.
+
+AC_CHECK_FUNCS(bcopy memmove strerror)
+
+dnl Handle --enable-utf8
+
+AC_ARG_ENABLE(utf8,
+[  --enable-utf8           enable UTF8 support],
+if test "$enableval" = "yes"; then
+  UTF8=-DSUPPORT_UTF8
+fi
+)
+
+dnl Handle --enable-newline-is-cr
+
+AC_ARG_ENABLE(newline-is-cr,
+[  --enable-newline-is-cr  use CR as the newline character],
+if test "$enableval" = "yes"; then
+  NEWLINE=-DNEWLINE=13
+fi
+)
+
+dnl Handle --enable-newline-is-lf
+
+AC_ARG_ENABLE(newline-is-lf,
+[  --enable-newline-is-lf  use LF as the newline character],
+if test "$enableval" = "yes"; then
+  NEWLINE=-DNEWLINE=10
+fi
+)
+
+dnl Handle --enable-ebcdic
+
+AC_ARG_ENABLE(ebcdic,
+[  --enable-ebcdic         assume EBCDIC coding rather than ASCII],
+if test "$enableval" == "yes"; then
+  EBCDIC=-DEBCDIC=1
+fi
+)
+
+dnl Handle --disable-stack-for-recursion
+AC_ARG_ENABLE(recursion,
+[  --disable-stack-for-recursion  disable use of stack recursion when matching],
+if test "$enableval" = "no"; then
+  NO_RECURSE=-DNO_RECURSE
+fi
+)
+
+dnl There doesn't seem to be a straightforward way of having parameters
+dnl that set values, other than fudging the --with thing. So that's what
+dnl I've done.
+
+dnl Handle --with-posix-malloc-threshold=n
+
+AC_ARG_WITH(posix-malloc-threshold,
+[  --with-posix-malloc-threshold=5  threshold for POSIX malloc usage],
+  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval
+)
+
+dnl Handle --with-link-size=n
+
+AC_ARG_WITH(link-size,
+[  --with-link-size=2    internal link size (2, 3, or 4 allowed)],
+  LINK_SIZE=-DLINK_SIZE=$withval
+)
+
+dnl Handle --with-match_limit=n
+
+AC_ARG_WITH(match-limit,
+[  --with-match-limit=10000000      default limit on internal looping)],
+  MATCH_LIMIT=-DMATCH_LIMIT=$withval
+)
+
+dnl Now arrange to build libtool
+
+AC_PROG_LIBTOOL
+
+dnl "Export" these variables
+
+AC_SUBST(BUILD_EXEEXT)
+AC_SUBST(BUILD_OBJEXT)
+AC_SUBST(CC_FOR_BUILD)
+AC_SUBST(CFLAGS_FOR_BUILD)
+AC_SUBST(EBCDIC)
+AC_SUBST(HAVE_MEMMOVE)
+AC_SUBST(HAVE_STRERROR)
+AC_SUBST(LINK_SIZE)
+AC_SUBST(MATCH_LIMIT)
+AC_SUBST(NEWLINE)
+AC_SUBST(NO_RECURSE)
+AC_SUBST(PCRE_MAJOR)
+AC_SUBST(PCRE_MINOR)
+AC_SUBST(PCRE_DATE)
+AC_SUBST(PCRE_VERSION)
+AC_SUBST(PCRE_LIB_VERSION)
+AC_SUBST(PCRE_POSIXLIB_VERSION)
+AC_SUBST(POSIX_MALLOC_THRESHOLD)
+AC_SUBST(UTF8)
+
+dnl Stuff to make MinGW work better. Special treatment is no longer
+dnl needed for Cygwin.
+
+case $host_os in
+mingw* )
+    POSIX_OBJ=pcreposix.o
+    POSIX_LOBJ=pcreposix.lo
+    POSIX_LIB=
+    ON_WINDOWS=
+    NOT_ON_WINDOWS="#"
+    WIN_PREFIX=
+    ;;
+* )
+    ON_WINDOWS="#"
+    NOT_ON_WINDOWS=
+    POSIX_OBJ=
+    POSIX_LOBJ=
+    POSIX_LIB=libpcreposix.la
+    WIN_PREFIX=
+    ;;
+esac
+AC_SUBST(WIN_PREFIX)
+AC_SUBST(ON_WINDOWS)
+AC_SUBST(NOT_ON_WINDOWS)
+AC_SUBST(POSIX_OBJ)
+AC_SUBST(POSIX_LOBJ)
+AC_SUBST(POSIX_LIB)
+
+if test "x$enable_shared" = "xno" ; then
+    AC_DEFINE([PCRE_STATIC],[1],[to link statically])
+fi
+
+dnl This must be last; it determines what files are written as well as config.h
+AC_OUTPUT(Makefile pcre.h:pcre.in pcre-config:pcre-config.in RunTest:RunTest.in,[chmod a+x RunTest pcre-config])
diff --git a/external-libs/pcre/dftables.c b/external-libs/pcre/dftables.c
new file mode 100644
index 00000000..0c9f9a12
--- /dev/null
+++ b/external-libs/pcre/dftables.c
@@ -0,0 +1,167 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+
+See the file Tech.Notes for some information on the internals.
+*/
+
+
+/* This is a support program to generate the file chartables.c, containing
+character tables of various kinds. They are built according to the default C
+locale and used as the default tables by PCRE. Now that pcre_maketables is
+a function visible to the outside world, we make use of its code from here in
+order to be consistent. */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "internal.h"
+
+#define DFTABLES          /* maketables.c notices this */
+#include "maketables.c"
+
+
+int main(int argc, char **argv)
+{
+int i;
+FILE *f;
+const unsigned char *tables = pcre_maketables();
+
+if (argc != 2)
+  {
+  fprintf(stderr, "dftables: one filename argument is required\n");
+  return 1;
+  }
+
+f = fopen(argv[1], "w");
+if (f == NULL)
+  {
+  fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
+  return 1;
+  }
+
+/* There are two fprintf() calls here, because gcc in pedantic mode complains
+about the very long string otherwise. */
+
+fprintf(f,
+  "/*************************************************\n"
+  "*      Perl-Compatible Regular Expressions       *\n"
+  "*************************************************/\n\n"
+  "/* This file is automatically written by the dftables auxiliary \n"
+  "program. If you edit it by hand, you might like to edit the Makefile to \n"
+  "prevent its ever being regenerated.\n\n");
+fprintf(f,
+  "This file is #included in the compilation of pcre.c to build the default\n"
+  "character tables which are used when no tables are passed to the compile\n"
+  "function. */\n\n"
+  "static unsigned char pcre_default_tables[] = {\n\n"
+  "/* This table is a lower casing table. */\n\n");
+
+fprintf(f, "  ");
+for (i = 0; i < 256; i++)
+  {
+  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
+  fprintf(f, "%3d", *tables++);
+  if (i != 255) fprintf(f, ",");
+  }
+fprintf(f, ",\n\n");
+
+fprintf(f, "/* This table is a case flipping table. */\n\n");
+
+fprintf(f, "  ");
+for (i = 0; i < 256; i++)
+  {
+  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
+  fprintf(f, "%3d", *tables++);
+  if (i != 255) fprintf(f, ",");
+  }
+fprintf(f, ",\n\n");
+
+fprintf(f,
+  "/* This table contains bit maps for various character classes.\n"
+  "Each map is 32 bytes long and the bits run from the least\n"
+  "significant end of each byte. The classes that have their own\n"
+  "maps are: space, xdigit, digit, upper, lower, word, graph\n"
+  "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
+
+fprintf(f, "  ");
+for (i = 0; i < cbit_length; i++)
+  {
+  if ((i & 7) == 0 && i != 0)
+    {
+    if ((i & 31) == 0) fprintf(f, "\n");
+    fprintf(f, "\n  ");
+    }
+  fprintf(f, "0x%02x", *tables++);
+  if (i != cbit_length - 1) fprintf(f, ",");
+  }
+fprintf(f, ",\n\n");
+
+fprintf(f,
+  "/* This table identifies various classes of character by individual bits:\n"
+  "  0x%02x   white space character\n"
+  "  0x%02x   letter\n"
+  "  0x%02x   decimal digit\n"
+  "  0x%02x   hexadecimal digit\n"
+  "  0x%02x   alphanumeric or '_'\n"
+  "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
+  ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
+  ctype_meta);
+
+fprintf(f, "  ");
+for (i = 0; i < 256; i++)
+  {
+  if ((i & 7) == 0 && i != 0)
+    {
+    fprintf(f, " /* ");
+    if (isprint(i-8)) fprintf(f, " %c -", i-8);
+      else fprintf(f, "%3d-", i-8);
+    if (isprint(i-1)) fprintf(f, " %c ", i-1);
+      else fprintf(f, "%3d", i-1);
+    fprintf(f, " */\n  ");
+    }
+  fprintf(f, "0x%02x", *tables++);
+  if (i != 255) fprintf(f, ",");
+  }
+
+fprintf(f, "};/* ");
+if (isprint(i-8)) fprintf(f, " %c -", i-8);
+  else fprintf(f, "%3d-", i-8);
+if (isprint(i-1)) fprintf(f, " %c ", i-1);
+  else fprintf(f, "%3d", i-1);
+fprintf(f, " */\n\n/* End of chartables.c */\n");
+
+fclose(f);
+return 0;
+}
+
+/* End of dftables.c */
diff --git a/external-libs/pcre/dftables/Abuild.conf b/external-libs/pcre/dftables/Abuild.conf
new file mode 100755
index 00000000..3e33ffff
--- /dev/null
+++ b/external-libs/pcre/dftables/Abuild.conf
@@ -0,0 +1,2 @@
+name: dftables

+platform-types: native

diff --git a/external-libs/pcre/dftables/Abuild.interface b/external-libs/pcre/dftables/Abuild.interface
new file mode 100755
index 00000000..e8efa9cf
--- /dev/null
+++ b/external-libs/pcre/dftables/Abuild.interface
@@ -0,0 +1 @@
+declare DFTABLES_DIR filename = $(ABUILD_OUTPUT_DIR)

diff --git a/external-libs/pcre/dftables/Abuild.mk b/external-libs/pcre/dftables/Abuild.mk
new file mode 100755
index 00000000..c2cfcaa7
--- /dev/null
+++ b/external-libs/pcre/dftables/Abuild.mk
@@ -0,0 +1,4 @@
+TARGETS_bin := dftables

+SRCS_bin_dftables := dftables.c

+VPATH := ../..

+RULES := ccxx

diff --git a/external-libs/pcre/doc/Tech.Notes b/external-libs/pcre/doc/Tech.Notes
new file mode 100644
index 00000000..73c31c7c
--- /dev/null
+++ b/external-libs/pcre/doc/Tech.Notes
@@ -0,0 +1,281 @@
+Technical Notes about PCRE
+--------------------------
+
+Many years ago I implemented some regular expression functions to an algorithm
+suggested by Martin Richards. These were not Unix-like in form, and were quite
+restricted in what they could do by comparison with Perl. The interesting part
+about the algorithm was that the amount of space required to hold the compiled
+form of an expression was known in advance. The code to apply an expression did
+not operate by backtracking, as the original Henry Spencer code and current
+Perl code does, but instead checked all possibilities simultaneously by keeping
+a list of current states and checking all of them as it advanced through the
+subject string. (In the terminology of Jeffrey Friedl's book, it was a "DFA
+algorithm".) When the pattern was all used up, all remaining states were
+possible matches, and the one matching the longest subset of the subject string
+was chosen. This did not necessarily maximize the individual wild portions of
+the pattern, as is expected in Unix and Perl-style regular expressions.
+
+By contrast, the code originally written by Henry Spencer and subsequently
+heavily modified for Perl actually compiles the expression twice: once in a
+dummy mode in order to find out how much store will be needed, and then for
+real. The execution function operates by backtracking and maximizing (or,
+optionally, minimizing in Perl) the amount of the subject that matches
+individual wild portions of the pattern. This is an "NFA algorithm" in Friedl's
+terminology.
+
+For the set of functions that forms PCRE (which are unrelated to those
+mentioned above), I tried at first to invent an algorithm that used an amount
+of store bounded by a multiple of the number of characters in the pattern, to
+save on compiling time. However, because of the greater complexity in Perl
+regular expressions, I couldn't do this. In any case, a first pass through the
+pattern is needed, for a number of reasons. PCRE works by running a very
+degenerate first pass to calculate a maximum store size, and then a second pass
+to do the real compile - which may use a bit less than the predicted amount of
+store. The idea is that this is going to turn out faster because the first pass
+is degenerate and the second pass can just store stuff straight into the
+vector. It does make the compiling functions bigger, of course, but they have
+got quite big anyway to handle all the Perl stuff.
+
+The compiled form of a pattern is a vector of bytes, containing items of
+variable length. The first byte in an item is an opcode, and the length of the
+item is either implicit in the opcode or contained in the data bytes which
+follow it. A list of all the opcodes follows:
+
+Opcodes with no following data
+------------------------------
+
+These items are all just one byte long
+
+  OP_END                 end of pattern
+  OP_ANY                 match any character
+  OP_ANYBYTE             match any single byte, even in UTF-8 mode 
+  OP_SOD                 match start of data: \A
+  OP_SOM,                start of match (subject + offset): \G
+  OP_CIRC                ^ (start of data, or after \n in multiline)
+  OP_NOT_WORD_BOUNDARY   \W
+  OP_WORD_BOUNDARY       \w
+  OP_NOT_DIGIT           \D
+  OP_DIGIT               \d
+  OP_NOT_WHITESPACE      \S
+  OP_WHITESPACE          \s
+  OP_NOT_WORDCHAR        \W
+  OP_WORDCHAR            \w
+  OP_EODN                match end of data or \n at end: \Z
+  OP_EOD                 match end of data: \z
+  OP_DOLL                $ (end of data, or before \n in multiline)
+
+
+Repeating single characters
+---------------------------
+
+The common repeats (*, +, ?) when applied to a single character appear as
+two-byte items using the following opcodes:
+
+  OP_STAR
+  OP_MINSTAR
+  OP_PLUS
+  OP_MINPLUS
+  OP_QUERY
+  OP_MINQUERY
+
+Those with "MIN" in their name are the minimizing versions. Each is followed by
+the character that is to be repeated. Other repeats make use of
+
+  OP_UPTO
+  OP_MINUPTO
+  OP_EXACT
+
+which are followed by a two-byte count (most significant first) and the
+repeated character. OP_UPTO matches from 0 to the given number. A repeat with a
+non-zero minimum and a fixed maximum is coded as an OP_EXACT followed by an
+OP_UPTO (or OP_MINUPTO).
+
+
+Repeating character types
+-------------------------
+
+Repeats of things like \d are done exactly as for single characters, except
+that instead of a character, the opcode for the type is stored in the data
+byte. The opcodes are:
+
+  OP_TYPESTAR
+  OP_TYPEMINSTAR
+  OP_TYPEPLUS
+  OP_TYPEMINPLUS
+  OP_TYPEQUERY
+  OP_TYPEMINQUERY
+  OP_TYPEUPTO
+  OP_TYPEMINUPTO
+  OP_TYPEEXACT
+
+
+Matching a character string
+---------------------------
+
+The OP_CHARS opcode is followed by a one-byte count and then that number of
+characters. If there are more than 255 characters in sequence, successive
+instances of OP_CHARS are used.
+
+
+Character classes
+-----------------
+
+If there is only one character, OP_CHARS is used for a positive class,
+and OP_NOT for a negative one (that is, for something like [^a]). However, in 
+UTF-8 mode, this applies only to characters with values < 128, because OP_NOT 
+is confined to single bytes.
+
+Another set of repeating opcodes (OP_NOTSTAR etc.) are used for a repeated,
+negated, single-character class. The normal ones (OP_STAR etc.) are used for a
+repeated positive single-character class.
+
+When there's more than one character in a class and all the characters are less
+than 256, OP_CLASS is used for a positive class, and OP_NCLASS for a negative 
+one. In either case, the opcode is followed by a 32-byte bit map containing a 1
+bit for every character that is acceptable. The bits are counted from the least
+significant end of each byte.
+
+The reason for having both OP_CLASS and OP_NCLASS is so that, in UTF-8 mode, 
+subject characters with values greater than 256 can be handled correctly. For 
+OP_CLASS they don't match, whereas for OP_NCLASS they do.
+
+For classes containing characters with values > 255, OP_XCLASS is used. It
+optionally uses a bit map (if any characters lie within it), followed by a list
+of pairs and single characters. There is a flag character than indicates 
+whether it's a positive or a negative class.
+
+
+Back references
+---------------
+
+OP_REF is followed by two bytes containing the reference number.
+
+
+Repeating character classes and back references
+-----------------------------------------------
+
+Single-character classes are handled specially (see above). This applies to
+OP_CLASS and OP_REF. In both cases, the repeat information follows the base
+item. The matching code looks at the following opcode to see if it is one of
+
+  OP_CRSTAR
+  OP_CRMINSTAR
+  OP_CRPLUS
+  OP_CRMINPLUS
+  OP_CRQUERY
+  OP_CRMINQUERY
+  OP_CRRANGE
+  OP_CRMINRANGE
+
+All but the last two are just single-byte items. The others are followed by
+four bytes of data, comprising the minimum and maximum repeat counts.
+
+
+Brackets and alternation
+------------------------
+
+A pair of non-capturing (round) brackets is wrapped round each expression at
+compile time, so alternation always happens in the context of brackets.
+
+Non-capturing brackets use the opcode OP_BRA, while capturing brackets use
+OP_BRA+1, OP_BRA+2, etc. [Note for North Americans: "bracket" to some English
+speakers, including myself, can be round, square, curly, or pointy. Hence this
+usage.]
+
+Originally PCRE was limited to 99 capturing brackets (so as not to use up all
+the opcodes). From release 3.5, there is no limit. What happens is that the
+first ones, up to EXTRACT_BASIC_MAX are handled with separate opcodes, as
+above. If there are more, the opcode is set to EXTRACT_BASIC_MAX+1, and the
+first operation in the bracket is OP_BRANUMBER, followed by a 2-byte bracket
+number. This opcode is ignored while matching, but is fished out when handling
+the bracket itself. (They could have all been done like this, but I was making
+minimal changes.)
+
+A bracket opcode is followed by two bytes which give the offset to the next
+alternative OP_ALT or, if there aren't any branches, to the matching KET
+opcode. Each OP_ALT is followed by two bytes giving the offset to the next one,
+or to the KET opcode.
+
+OP_KET is used for subpatterns that do not repeat indefinitely, while
+OP_KETRMIN and OP_KETRMAX are used for indefinite repetitions, minimally or
+maximally respectively. All three are followed by two bytes giving (as a
+positive number) the offset back to the matching BRA opcode.
+
+If a subpattern is quantified such that it is permitted to match zero times, it
+is preceded by one of OP_BRAZERO or OP_BRAMINZERO. These are single-byte
+opcodes which tell the matcher that skipping this subpattern entirely is a
+valid branch.
+
+A subpattern with an indefinite maximum repetition is replicated in the
+compiled data its minimum number of times (or once with a BRAZERO if the
+minimum is zero), with the final copy terminating with a KETRMIN or KETRMAX as
+appropriate.
+
+A subpattern with a bounded maximum repetition is replicated in a nested
+fashion up to the maximum number of times, with BRAZERO or BRAMINZERO before
+each replication after the minimum, so that, for example, (abc){2,5} is
+compiled as (abc)(abc)((abc)((abc)(abc)?)?)?. The 99 and 200 bracket limits do
+not apply to these internally generated brackets.
+
+
+Assertions
+----------
+
+Forward assertions are just like other subpatterns, but starting with one of
+the opcodes OP_ASSERT or OP_ASSERT_NOT. Backward assertions use the opcodes
+OP_ASSERTBACK and OP_ASSERTBACK_NOT, and the first opcode inside the assertion
+is OP_REVERSE, followed by a two byte count of the number of characters to move
+back the pointer in the subject string. When operating in UTF-8 mode, the count
+is a character count rather than a byte count. A separate count is present in
+each alternative of a lookbehind assertion, allowing them to have different
+fixed lengths.
+
+
+Once-only subpatterns
+---------------------
+
+These are also just like other subpatterns, but they start with the opcode
+OP_ONCE.
+
+
+Conditional subpatterns
+-----------------------
+
+These are like other subpatterns, but they start with the opcode OP_COND. If
+the condition is a back reference, this is stored at the start of the
+subpattern using the opcode OP_CREF followed by two bytes containing the
+reference number. If the condition is "in recursion" (coded as "(?(R)"), the
+same scheme is used, with a "reference number" of 0xffff. Otherwise, a
+conditional subpattern always starts with one of the assertions.
+
+
+Recursion
+---------
+
+Recursion either matches the current regex, or some subexpression. The opcode
+OP_RECURSE is followed by an value which is the offset to the starting bracket
+from the start of the whole pattern.
+
+
+Callout
+-------
+
+OP_CALLOUT is followed by one byte of data that holds a callout number in the 
+range 0 to 255.
+
+
+Changing options
+----------------
+
+If any of the /i, /m, or /s options are changed within a pattern, an OP_OPT
+opcode is compiled, followed by one byte containing the new settings of these
+flags. If there are several alternatives, there is an occurrence of OP_OPT at
+the start of all those following the first options change, to set appropriate
+options for the start of the alternative. Immediately after the end of the
+group there is another such item to reset the flags to their previous values. A
+change of flag right at the very start of the pattern can be handled entirely
+at compile time, and so does not cause anything to be put into the compiled
+data.
+
+Philip Hazel
+August 2003
diff --git a/external-libs/pcre/doc/html/index.html b/external-libs/pcre/doc/html/index.html
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--- /dev/null
+++ b/external-libs/pcre/doc/html/index.html
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+<html>
+<head>
+<title>PCRE specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+<h1>Perl-compatible Regular Expressions (PCRE)</h1>
+<p>
+The HTML documentation for PCRE comprises the following pages:
+</p>
+
+<table>
+<tr><td><a href="pcre.html">pcre</a></td>
+    <td>&nbsp;&nbsp;Introductory page</td></tr>
+
+<tr><td><a href="pcreapi.html">pcreapi</a></td>
+    <td>&nbsp;&nbsp;PCRE's native API</td></tr>
+
+<tr><td><a href="pcrebuild.html">pcrebuild</a></td>
+    <td>&nbsp;&nbsp;Options for building PCRE</td></tr>
+
+<tr><td><a href="pcrecallout.html">pcrecallout</a></td>
+    <td>&nbsp;&nbsp;The <i>callout</i> facility</td></tr>
+
+<tr><td><a href="pcrecompat.html">pcrecompat</a></td>
+    <td>&nbsp;&nbsp;Compability with Perl</td></tr>
+
+<tr><td><a href="pcregrep.html">pcregrep</a></td>
+    <td>&nbsp;&nbsp;The <b>pcregrep</b> command</td></tr>
+
+<tr><td><a href="pcrepattern.html">pcrepattern</a></td>
+    <td>&nbsp;&nbsp;Regular expressions supported by PCRE</td></tr>
+
+<tr><td><a href="pcreperform.html">pcreperform</a></td>
+    <td>&nbsp;&nbsp;Some comments on performance</td></tr>
+
+<tr><td><a href="pcreposix.html">pcreposix</a></td>
+    <td>&nbsp;&nbsp;The POSIX API to the PCRE library</td></tr>
+
+<tr><td><a href="pcresample.html">pcresample</a></td>
+    <td>&nbsp;&nbsp;Description of the sample program</td></tr>
+
+<tr><td><a href="pcretest.html">pcretest</a></td>
+    <td>&nbsp;&nbsp;The <b>pcretest</b> command for testing PCRE</td></tr>
+</table>
+
+<p>
+There are also individual pages that summarize the interface for each function
+in the library:
+</p>
+
+<table>
+
+<tr><td><a href="pcre_compile.html">pcre_compile</a></td>
+    <td>&nbsp;&nbsp;Compile a regular expression</td></tr>
+
+<tr><td><a href="pcre_config.html">pcre_config</a></td>
+    <td>&nbsp;&nbsp;Show build-time configuration options</td></tr>
+
+<tr><td><a href="pcre_copy_named_substring.html">pcre_copy_named_substring</a></td>
+    <td>&nbsp;&nbsp;Extract named substring into given buffer</td></tr>
+
+<tr><td><a href="pcre_copy_substring.html">pcre_copy_substring</a></td>
+    <td>&nbsp;&nbsp;Extract numbered substring into given buffer</td></tr>
+
+<tr><td><a href="pcre_exec.html">pcre_exec</a></td>
+    <td>&nbsp;&nbsp;Match a compiled pattern to a subject string</td></tr>
+
+<tr><td><a href="pcre_free_substring.html">pcre_free_substring</a></td>
+    <td>&nbsp;&nbsp;Free extracted substring</td></tr>
+
+<tr><td><a href="pcre_free_substring_list.html">pcre_free_substring_list</a></td>
+    <td>&nbsp;&nbsp;Free list of extracted substrings</td></tr>
+
+<tr><td><a href="pcre_fullinfo.html">pcre_fullinfo</a></td>
+    <td>&nbsp;&nbsp;Extract information about a pattern</td></tr>
+
+<tr><td><a href="pcre_get_named_substring.html">pcre_get_named_substring</a></td>
+    <td>&nbsp;&nbsp;Extract named substring into new memory</td></tr>
+
+<tr><td><a href="pcre_get_stringnumber.html">pcre_get_stringnumber</a></td>
+    <td>&nbsp;&nbsp;Convert captured string name to number</td></tr>
+
+<tr><td><a href="pcre_get_substring.html">pcre_get_substring</a></td>
+    <td>&nbsp;&nbsp;Extract numbered substring into new memory</td></tr>
+
+<tr><td><a href="pcre_get_substring_list.html">pcre_get_substring_list</a></td>
+    <td>&nbsp;&nbsp;Extract all substrings into new memory</td></tr>
+
+<tr><td><a href="pcre_info.html">pcre_info</a></td>
+    <td>&nbsp;&nbsp;Obsolete information extraction function</td></tr>
+
+<tr><td><a href="pcre_maketables.html">pcre_maketables</a></td>
+    <td>&nbsp;&nbsp;Build character tables in current locale</td></tr>
+
+<tr><td><a href="pcre_study.html">pcre_study</a></td>
+    <td>&nbsp;&nbsp;Study a compiled pattern</td></tr>
+
+<tr><td><a href="pcre_version.html">pcre_version</a></td>
+    <td>&nbsp;&nbsp;Return PCRE version and release date</td></tr>
+</table>
+
+</html>
diff --git a/external-libs/pcre/doc/html/pcre.html b/external-libs/pcre/doc/html/pcre.html
new file mode 100644
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--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre.html
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+<html>
+<head>
+<title>pcre specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">DESCRIPTION</a>
+<li><a name="TOC2" href="#SEC2">USER DOCUMENTATION</a>
+<li><a name="TOC3" href="#SEC3">LIMITATIONS</a>
+<li><a name="TOC4" href="#SEC4">UTF-8 SUPPORT</a>
+<li><a name="TOC5" href="#SEC5">AUTHOR</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">DESCRIPTION</a><br>
+<P>
+The PCRE library is a set of functions that implement regular expression
+pattern matching using the same syntax and semantics as Perl, with just a few
+differences. The current implementation of PCRE (release 4.x) corresponds
+approximately with Perl 5.8, including support for UTF-8 encoded strings.
+However, this support has to be explicitly enabled; it is not the default.
+</P>
+<P>
+PCRE is written in C and released as a C library. However, a number of people
+have written wrappers and interfaces of various kinds. A C++ class is included
+in these contributions, which can be found in the <i>Contrib</i> directory at
+the primary FTP site, which is:
+</P>
+<a href="ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre">ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre</a>
+<P>
+Details of exactly which Perl regular expression features are and are not
+supported by PCRE are given in separate documents. See the
+<a href="pcrepattern.html"><b>pcrepattern</b></a>
+and
+<a href="pcrecompat.html"><b>pcrecompat</b></a>
+pages.
+</P>
+<P>
+Some features of PCRE can be included, excluded, or changed when the library is
+built. The
+<a href="pcre_config.html"><b>pcre_config()</b></a>
+function makes it possible for a client to discover which features are
+available. Documentation about building PCRE for various operating systems can
+be found in the <b>README</b> file in the source distribution.
+</P>
+<br><a name="SEC2" href="#TOC1">USER DOCUMENTATION</a><br>
+<P>
+The user documentation for PCRE has been split up into a number of different
+sections. In the "man" format, each of these is a separate "man page". In the
+HTML format, each is a separate page, linked from the index page. In the plain
+text format, all the sections are concatenated, for ease of searching. The
+sections are as follows:
+</P>
+<P>
+<pre>
+  pcre              this document
+  pcreapi           details of PCRE's native API
+  pcrebuild         options for building PCRE
+  pcrecallout       details of the callout feature
+  pcrecompat        discussion of Perl compatibility
+  pcregrep          description of the <b>pcregrep</b> command
+  pcrepattern       syntax and semantics of supported
+                      regular expressions
+  pcreperform       discussion of performance issues
+  pcreposix         the POSIX-compatible API
+  pcresample        discussion of the sample program
+  pcretest          the <b>pcretest</b> testing command
+</PRE>
+</P>
+<P>
+In addition, in the "man" and HTML formats, there is a short page for each
+library function, listing its arguments and results.
+</P>
+<br><a name="SEC3" href="#TOC1">LIMITATIONS</a><br>
+<P>
+There are some size limitations in PCRE but it is hoped that they will never in
+practice be relevant.
+</P>
+<P>
+The maximum length of a compiled pattern is 65539 (sic) bytes if PCRE is
+compiled with the default internal linkage size of 2. If you want to process
+regular expressions that are truly enormous, you can compile PCRE with an
+internal linkage size of 3 or 4 (see the <b>README</b> file in the source
+distribution and the
+<a href="pcrebuild.html"><b>pcrebuild</b></a>
+documentation for details). If these cases the limit is substantially larger.
+However, the speed of execution will be slower.
+</P>
+<P>
+All values in repeating quantifiers must be less than 65536.
+The maximum number of capturing subpatterns is 65535.
+</P>
+<P>
+There is no limit to the number of non-capturing subpatterns, but the maximum
+depth of nesting of all kinds of parenthesized subpattern, including capturing
+subpatterns, assertions, and other types of subpattern, is 200.
+</P>
+<P>
+The maximum length of a subject string is the largest positive number that an
+integer variable can hold. However, PCRE uses recursion to handle subpatterns
+and indefinite repetition. This means that the available stack space may limit
+the size of a subject string that can be processed by certain patterns.
+</P>
+<a name="utf8support"></a><br><a name="SEC4" href="#TOC1">UTF-8 SUPPORT</a><br>
+<P>
+Starting at release 3.3, PCRE has had some support for character strings
+encoded in the UTF-8 format. For release 4.0 this has been greatly extended to
+cover most common requirements.
+</P>
+<P>
+In order process UTF-8 strings, you must build PCRE to include UTF-8 support in
+the code, and, in addition, you must call
+<a href="pcre_compile.html"><b>pcre_compile()</b></a>
+with the PCRE_UTF8 option flag. When you do this, both the pattern and any
+subject strings that are matched against it are treated as UTF-8 strings
+instead of just strings of bytes.
+</P>
+<P>
+If you compile PCRE with UTF-8 support, but do not use it at run time, the
+library will be a bit bigger, but the additional run time overhead is limited
+to testing the PCRE_UTF8 flag in several places, so should not be very large.
+</P>
+<P>
+The following comments apply when PCRE is running in UTF-8 mode:
+</P>
+<P>
+1. When you set the PCRE_UTF8 flag, the strings passed as patterns and subjects
+are checked for validity on entry to the relevant functions. If an invalid
+UTF-8 string is passed, an error return is given. In some situations, you may
+already know that your strings are valid, and therefore want to skip these
+checks in order to improve performance. If you set the PCRE_NO_UTF8_CHECK flag
+at compile time or at run time, PCRE assumes that the pattern or subject it
+is given (respectively) contains only valid UTF-8 codes. In this case, it does
+not diagnose an invalid UTF-8 string. If you pass an invalid UTF-8 string to
+PCRE when PCRE_NO_UTF8_CHECK is set, the results are undefined. Your program
+may crash.
+</P>
+<P>
+2. In a pattern, the escape sequence \x{...}, where the contents of the braces
+is a string of hexadecimal digits, is interpreted as a UTF-8 character whose
+code number is the given hexadecimal number, for example: \x{1234}. If a
+non-hexadecimal digit appears between the braces, the item is not recognized.
+This escape sequence can be used either as a literal, or within a character
+class.
+</P>
+<P>
+3. The original hexadecimal escape sequence, \xhh, matches a two-byte UTF-8
+character if the value is greater than 127.
+</P>
+<P>
+4. Repeat quantifiers apply to complete UTF-8 characters, not to individual
+bytes, for example: \x{100}{3}.
+</P>
+<P>
+5. The dot metacharacter matches one UTF-8 character instead of a single byte.
+</P>
+<P>
+6. The escape sequence \C can be used to match a single byte in UTF-8 mode,
+but its use can lead to some strange effects.
+</P>
+<P>
+7. The character escapes \b, \B, \d, \D, \s, \S, \w, and \W correctly
+test characters of any code value, but the characters that PCRE recognizes as
+digits, spaces, or word characters remain the same set as before, all with
+values less than 256.
+</P>
+<P>
+8. Case-insensitive matching applies only to characters whose values are less
+than 256. PCRE does not support the notion of "case" for higher-valued
+characters.
+</P>
+<P>
+9. PCRE does not support the use of Unicode tables and properties or the Perl
+escapes \p, \P, and \X.
+</P>
+<br><a name="SEC5" href="#TOC1">AUTHOR</a><br>
+<P>
+Philip Hazel &#60;ph10@cam.ac.uk&#62;
+<br>
+University Computing Service,
+<br>
+Cambridge CB2 3QG, England.
+<br>
+Phone: +44 1223 334714
+</P>
+<P>
+Last updated: 20 August 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcre_compile.html b/external-libs/pcre/doc/html/pcre_compile.html
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@@ -0,0 +1,71 @@
+<html>
+<head>
+<title>pcre_compile specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>pcre *pcre_compile(const char *<i>pattern</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>, int *<i>erroffset</i>,</b>
+<b>const unsigned char *<i>tableptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function compiles a regular expression into an internal form. Its
+arguments are:
+</P>
+<P>
+<pre>
+  <i>pattern</i>       A zero-terminated string containing the
+                  regular expression to be compiled
+  <i>options</i>       Zero or more option bits
+  <i>errptr</i>        Where to put an error message
+  <i>erroffset</i>     Offset in pattern where error was found
+  <i>tableptr</i>      Pointer to character tables, or NULL to
+                  use the built-in default
+</PRE>
+</P>
+<P>
+The option bits are:
+</P>
+<P>
+<pre>
+  PCRE_ANCHORED         Force pattern anchoring
+  PCRE_CASELESS         Do caseless matching
+  PCRE_DOLLAR_ENDONLY   $ not to match newline at end
+  PCRE_DOTALL           . matches anything including NL
+  PCRE_EXTENDED         Ignore whitespace and # comments
+  PCRE_EXTRA            PCRE extra features
+                          (not much use currently)
+  PCRE_MULTILINE        ^ and $ match newlines within data
+  PCRE_NO_AUTO_CAPTURE  Disable numbered capturing paren-
+                          theses (named ones available)
+  PCRE_UNGREEDY         Invert greediness of quantifiers
+  PCRE_UTF8             Run in UTF-8 mode
+  PCRE_NO_UTF8_CHECK    Do not check the pattern for UTF-8
+                          validity (only relevant if
+                          PCRE_UTF8 is set)
+</PRE>
+</P>
+<P>
+PCRE must be compiled with UTF-8 support in order to use PCRE_UTF8
+(or PCRE_NO_UTF8_CHECK).
+</P>
+<P>
+The yield of the function is a pointer to a private data structure that
+contains the compiled pattern, or NULL if an error was detected.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_config.html b/external-libs/pcre/doc/html/pcre_config.html
new file mode 100644
index 00000000..3328b792
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_config.html
@@ -0,0 +1,56 @@
+<html>
+<head>
+<title>pcre_config specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_config(int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function makes it possible for a client program to find out which optional
+features are available in the version of the PCRE library it is using. Its
+arguments are as follows:
+</P>
+<P>
+<pre>
+  <i>what</i>     A code specifying what information is required
+  <i>where</i>    Points to where to put the data
+</PRE>
+</P>
+<P>
+The available codes are:
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_LINK_SIZE     Internal link size: 2, 3, or 4
+  PCRE_CONFIG_MATCH_LIMIT   Internal resource limit
+  PCRE_CONFIG_NEWLINE       Value of the newline character
+  PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+                            Threshold of return slots, above
+                              which <b>malloc()</b> is used by
+                              the POSIX API
+  PCRE_CONFIG_STACKRECURSE  Recursion implementation (1=stack 0=heap)
+  PCRE_CONFIG_UTF8          Availability of UTF-8 support (1=yes 0=no)
+</PRE>
+</P>
+<P>
+The function yields 0 on success or PCRE_ERROR_BADOPTION otherwise.
+</P>
+<P>
+There is a complete description of the PCRE native API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page, and a description of the POSIX API in the
+<a href="pcreposix.html"><b>pcreposix</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_copy_named_substring.html b/external-libs/pcre/doc/html/pcre_copy_named_substring.html
new file mode 100644
index 00000000..3b1da364
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_copy_named_substring.html
@@ -0,0 +1,46 @@
+<html>
+<head>
+<title>pcre_copy_named_substring specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_copy_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>char *<i>buffer</i>, int <i>buffersize</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for extracting a captured substring, identified
+by name, into a given buffer. The arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>          Pattern that was successfully matched
+  <i>subject</i>       Subject that has been successfully matched
+  <i>ovector</i>       Offset vector that <b>pcre_exec()</b> used
+  <i>stringcount</i>   Value returned by <b>pcre_exec()</b>
+  <i>stringname</i>    Name of the required substring
+  <i>buffer</i>        Buffer to receive the string
+  <i>buffersize</i>    Size of buffer
+</PRE>
+</P>
+<P>
+The yield is the length of the substring, PCRE_ERROR_NOMEMORY if the buffer was
+too small, or PCRE_ERROR_NOSUBSTRING if the string name is invalid.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_copy_substring.html b/external-libs/pcre/doc/html/pcre_copy_substring.html
new file mode 100644
index 00000000..f5b9b553
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_copy_substring.html
@@ -0,0 +1,44 @@
+<html>
+<head>
+<title>pcre_copy_substring specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_copy_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>, char *<i>buffer</i>,</b>
+<b>int <i>buffersize</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for extracting a captured substring into a given
+buffer. The arguments are:
+</P>
+<P>
+<pre>
+  <i>subject</i>       Subject that has been successfully matched
+  <i>ovector</i>       Offset vector that <b>pcre_exec()</b> used
+  <i>stringcount</i>   Value returned by <b>pcre_exec()</b>
+  <i>stringnumber</i>  Number of the required substring
+  <i>buffer</i>        Buffer to receive the string
+  <i>buffersize</i>    Size of buffer
+</PRE>
+</P>
+<P>
+The yield is the legnth of the string, PCRE_ERROR_NOMEMORY if the buffer was
+too small, or PCRE_ERROR_NOSUBSTRING if the string number is invalid.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_exec.html b/external-libs/pcre/doc/html/pcre_exec.html
new file mode 100644
index 00000000..cf86dfda
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_exec.html
@@ -0,0 +1,58 @@
+<html>
+<head>
+<title>pcre_exec specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_exec(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>const char *<i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
+<b>int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function matches a compiled regular expression against a given subject
+string, and returns offsets to capturing subexpressions. Its arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>         Points to the compiled pattern
+  <i>extra</i>        Points to an associated <b>pcre_extra</b> structure,
+                 or is NULL
+  <i>subject</i>      Points to the subject string
+  <i>length</i>       Length of the subject string, in bytes
+  <i>startoffset</i>  Offset in bytes in the subject at which to
+                 start matching
+  <i>options</i>      Option bits
+  <i>ovector</i>      Points to a vector of ints for result offsets
+  <i>ovecsize</i>     Size of the vector (a multiple of 3)
+</PRE>
+</P>
+<P>
+The options are:
+</P>
+<P>
+<pre>
+  PCRE_ANCHORED      Match only at the first position
+  PCRE_NOTBOL        Subject is not the beginning of a line
+  PCRE_NOTEOL        Subject is not the end of a line
+  PCRE_NOTEMPTY      An empty string is not a valid match
+  PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
+                       validity (only relevant if PCRE_UTF8
+                       was set at compile time)
+</PRE>
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_free_substring.html b/external-libs/pcre/doc/html/pcre_free_substring.html
new file mode 100644
index 00000000..08b16078
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_free_substring.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>pcre_free_substring specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>void pcre_free_substring(const char *<i>stringptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for freeing the store obtained by a previous
+call to <b>pcre_get_substring()</b> or <b>pcre_get_named_substring()</b>. Its
+only argument is a pointer to the string.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_free_substring_list.html b/external-libs/pcre/doc/html/pcre_free_substring_list.html
new file mode 100644
index 00000000..c130f281
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_free_substring_list.html
@@ -0,0 +1,29 @@
+<html>
+<head>
+<title>pcre_free_substring_list specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>void pcre_free_substring_list(const char **<i>stringptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for freeing the store obtained by a previous
+call to <b>pcre_get_substring_list()</b>. Its only argument is a pointer to the
+list of string pointers.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_fullinfo.html b/external-libs/pcre/doc/html/pcre_fullinfo.html
new file mode 100644
index 00000000..f43fa65f
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_fullinfo.html
@@ -0,0 +1,68 @@
+<html>
+<head>
+<title>pcre_fullinfo specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_fullinfo(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function returns information about a compiled pattern. Its arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>    Compiled regular expression
+  <i>extra</i>   Result of <b>pcre_study()</b> or NULL
+  <i>what</i>    What information is required
+  <i>where</i>   Where to put the information
+</PRE>
+</P>
+<P>
+The following information is available:
+</P>
+<P>
+<pre>
+  PCRE_INFO_BACKREFMAX     Number of highest back reference
+  PCRE_INFO_CAPTURECOUNT   Number of capturing subpatterns
+  PCRE_INFO_FIRSTBYTE      Fixed first byte for a match, or
+                             -1 for start of string
+                                or after newline, or
+                             -2 otherwise
+  PCRE_INFO_FIRSTTABLE     Table of first bytes
+                             (after studying)
+  PCRE_INFO_LASTLITERAL    Literal last byte required
+  PCRE_INFO_NAMECOUNT      Number of named subpatterns
+  PCRE_INFO_NAMEENTRYSIZE  Size of name table entry
+  PCRE_INFO_NAMETABLE      Pointer to name table
+  PCRE_INFO_OPTIONS        Options used for compilation
+  PCRE_INFO_SIZE           Size of compiled pattern
+</PRE>
+</P>
+<P>
+The yield of the function is zero on success or:
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NULL       the argument <i>code</i> was NULL
+                        the argument <i>where</i> was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+  PCRE_ERROR_BADOPTION  the value of <i>what</i> was invalid
+</PRE>
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_get_named_substring.html b/external-libs/pcre/doc/html/pcre_get_named_substring.html
new file mode 100644
index 00000000..89a2beeb
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_get_named_substring.html
@@ -0,0 +1,46 @@
+<html>
+<head>
+<title>pcre_get_named_substring specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_get_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for extracting a captured substring by name. The
+arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>          Compiled pattern
+  <i>subject</i>       Subject that has been successfully matched
+  <i>ovector</i>       Offset vector that <b>pcre_exec()</b> used
+  <i>stringcount</i>   Value returned by <b>pcre_exec()</b>
+  <i>stringname</i>    Name of the required substring
+  <i>stringptr</i>     Where to put the string pointer
+</PRE>
+</P>
+<P>
+The yield is the length of the extracted substring, PCRE_ERROR_NOMEMORY if
+sufficient memory could not be obtained, or PCRE_ERROR_NOSUBSTRING if the
+string name is invalid.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_get_stringnumber.html b/external-libs/pcre/doc/html/pcre_get_stringnumber.html
new file mode 100644
index 00000000..ee1c0a9c
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_get_stringnumber.html
@@ -0,0 +1,39 @@
+<html>
+<head>
+<title>pcre_get_stringnumber specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_get_stringnumber(const pcre *<i>code</i>,</b>
+<b>const char *<i>name</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This convenience function finds the number of a named substring capturing
+parenthesis in a compiled pattern. Its arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>    Compiled regular expression
+  <i>name</i>    Name whose number is required
+</PRE>
+</P>
+<P>
+The yield of the function is the number of the parenthesis if the name is
+found, or PCRE_ERROR_NOSUBSTRING otherwise.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_get_substring.html b/external-libs/pcre/doc/html/pcre_get_substring.html
new file mode 100644
index 00000000..2a55c10f
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_get_substring.html
@@ -0,0 +1,44 @@
+<html>
+<head>
+<title>pcre_get_substring specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_get_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for extracting a captured substring. The
+arguments are:
+</P>
+<P>
+<pre>
+  <i>subject</i>       Subject that has been successfully matched
+  <i>ovector</i>       Offset vector that <b>pcre_exec()</b> used
+  <i>stringcount</i>   Value returned by <b>pcre_exec()</b>
+  <i>stringnumber</i>  Number of the required substring
+  <i>stringptr</i>     Where to put the string pointer
+</PRE>
+</P>
+<P>
+The yield is the length of the substring, PCRE_ERROR_NOMEMORY if sufficient
+memory could not be obtained, or PCRE_ERROR_NOSUBSTRING if the string number is
+invalid.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_get_substring_list.html b/external-libs/pcre/doc/html/pcre_get_substring_list.html
new file mode 100644
index 00000000..7e91f56b
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_get_substring_list.html
@@ -0,0 +1,41 @@
+<html>
+<head>
+<title>pcre_get_substring_list specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_get_substring_list(const char *<i>subject</i>,</b>
+<b>int *<i>ovector</i>, int <i>stringcount</i>, const char ***<i>listptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This is a convenience function for extracting a list of all the captured
+substrings. The arguments are:
+</P>
+<P>
+<pre>
+  <i>subject</i>       Subject that has been successfully matched
+  <i>ovector</i>       Offset vector that <b>pcre_exec</b> used
+  <i>stringcount</i>   Value returned by <b>pcre_exec</b>
+  <i>listptr</i>       Where to put a pointer to the list
+</PRE>
+</P>
+<P>
+The yield is zero on success or PCRE_ERROR_NOMEMORY if sufficient memory could
+not be obtained.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_info.html b/external-libs/pcre/doc/html/pcre_info.html
new file mode 100644
index 00000000..97fc59b4
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_info.html
@@ -0,0 +1,28 @@
+<html>
+<head>
+<title>pcre_info specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>int pcre_info(const pcre *<i>code</i>, int *<i>optptr</i>, int</b>
+<b>*<i>firstcharptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function is obsolete. You should be using <b>pcre_fullinfo()</b> instead.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_maketables.html b/external-libs/pcre/doc/html/pcre_maketables.html
new file mode 100644
index 00000000..ba3e026b
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_maketables.html
@@ -0,0 +1,31 @@
+<html>
+<head>
+<title>pcre_maketables specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>const unsigned char *pcre_maketables(void);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function builds a set of character tables which can be passed to
+<b>pcre_compile()</b> to override PCRE's internal, built-in tables (which were
+made by <b>pcre_maketables()</b> when PCRE was compiled). You might want to do
+this if you are using a non-standard locale. The function yields a pointer to
+the tables.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_study.html b/external-libs/pcre/doc/html/pcre_study.html
new file mode 100644
index 00000000..f3727d1f
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_study.html
@@ -0,0 +1,45 @@
+<html>
+<head>
+<title>pcre_study specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>pcre_extra *pcre_study(const pcre *<i>code</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function studies a compiled pattern, to see if additional information can
+be extracted that might speed up matching. Its arguments are:
+</P>
+<P>
+<pre>
+  <i>code</i>       A compiled regular expression
+  <i>options</i>    Options for <b>pcre_study()</b>
+  <i>errptr</i>     Where to put an error message
+</PRE>
+</P>
+<P>
+If the function returns NULL, either it could not find any additional
+information, or there was an error. You can tell the difference by looking at
+the error value. It is NULL in first case.
+</P>
+<P>
+There are currently no options defined; the value of the second argument should
+always be zero.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcre_version.html b/external-libs/pcre/doc/html/pcre_version.html
new file mode 100644
index 00000000..35c47cd6
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcre_version.html
@@ -0,0 +1,28 @@
+<html>
+<head>
+<title>pcre_version specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<br><b>
+SYNOPSIS
+</b><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>char *pcre_version(void);</b>
+</P>
+<br><b>
+DESCRIPTION
+</b><br>
+<P>
+This function returns a character string that gives the version number of the
+PCRE library, and its date of release.
+</P>
+<P>
+There is a complete description of the PCRE API in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page.
diff --git a/external-libs/pcre/doc/html/pcreapi.html b/external-libs/pcre/doc/html/pcreapi.html
new file mode 100644
index 00000000..8ae6fb1e
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcreapi.html
@@ -0,0 +1,1346 @@
+<html>
+<head>
+<title>pcreapi specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">SYNOPSIS OF PCRE API</a>
+<li><a name="TOC2" href="#SEC2">PCRE API</a>
+<li><a name="TOC3" href="#SEC3">MULTITHREADING</a>
+<li><a name="TOC4" href="#SEC4">CHECKING BUILD-TIME OPTIONS</a>
+<li><a name="TOC5" href="#SEC5">COMPILING A PATTERN</a>
+<li><a name="TOC6" href="#SEC6">STUDYING A PATTERN</a>
+<li><a name="TOC7" href="#SEC7">LOCALE SUPPORT</a>
+<li><a name="TOC8" href="#SEC8">INFORMATION ABOUT A PATTERN</a>
+<li><a name="TOC9" href="#SEC9">OBSOLETE INFO FUNCTION</a>
+<li><a name="TOC10" href="#SEC10">MATCHING A PATTERN</a>
+<li><a name="TOC11" href="#SEC11">EXTRACTING CAPTURED SUBSTRINGS BY NUMBER</a>
+<li><a name="TOC12" href="#SEC12">EXTRACTING CAPTURED SUBSTRINGS BY NAME</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">SYNOPSIS OF PCRE API</a><br>
+<P>
+<b>#include &#60;pcre.h&#62;</b>
+</P>
+<P>
+<b>pcre *pcre_compile(const char *<i>pattern</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>, int *<i>erroffset</i>,</b>
+<b>const unsigned char *<i>tableptr</i>);</b>
+</P>
+<P>
+<b>pcre_extra *pcre_study(const pcre *<i>code</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>);</b>
+</P>
+<P>
+<b>int pcre_exec(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>const char *<i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
+<b>int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>);</b>
+</P>
+<P>
+<b>int pcre_copy_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>char *<i>buffer</i>, int <i>buffersize</i>);</b>
+</P>
+<P>
+<b>int pcre_copy_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>, char *<i>buffer</i>,</b>
+<b>int <i>buffersize</i>);</b>
+</P>
+<P>
+<b>int pcre_get_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<P>
+<b>int pcre_get_stringnumber(const pcre *<i>code</i>,</b>
+<b>const char *<i>name</i>);</b>
+</P>
+<P>
+<b>int pcre_get_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<P>
+<b>int pcre_get_substring_list(const char *<i>subject</i>,</b>
+<b>int *<i>ovector</i>, int <i>stringcount</i>, const char ***<i>listptr</i>);</b>
+</P>
+<P>
+<b>void pcre_free_substring(const char *<i>stringptr</i>);</b>
+</P>
+<P>
+<b>void pcre_free_substring_list(const char **<i>stringptr</i>);</b>
+</P>
+<P>
+<b>const unsigned char *pcre_maketables(void);</b>
+</P>
+<P>
+<b>int pcre_fullinfo(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<P>
+<b>int pcre_info(const pcre *<i>code</i>, int *<i>optptr</i>, int</b>
+<b>*<i>firstcharptr</i>);</b>
+</P>
+<P>
+<b>int pcre_config(int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<P>
+<b>char *pcre_version(void);</b>
+</P>
+<P>
+<b>void *(*pcre_malloc)(size_t);</b>
+</P>
+<P>
+<b>void (*pcre_free)(void *);</b>
+</P>
+<P>
+<b>void *(*pcre_stack_malloc)(size_t);</b>
+</P>
+<P>
+<b>void (*pcre_stack_free)(void *);</b>
+</P>
+<P>
+<b>int (*pcre_callout)(pcre_callout_block *);</b>
+</P>
+<br><a name="SEC2" href="#TOC1">PCRE API</a><br>
+<P>
+PCRE has its own native API, which is described in this document. There is also
+a set of wrapper functions that correspond to the POSIX regular expression API.
+These are described in the <b>pcreposix</b> documentation.
+</P>
+<P>
+The native API function prototypes are defined in the header file <b>pcre.h</b>,
+and on Unix systems the library itself is called <b>libpcre.a</b>, so can be
+accessed by adding <b>-lpcre</b> to the command for linking an application which
+calls it. The header file defines the macros PCRE_MAJOR and PCRE_MINOR to
+contain the major and minor release numbers for the library. Applications can
+use these to include support for different releases.
+</P>
+<P>
+The functions <b>pcre_compile()</b>, <b>pcre_study()</b>, and <b>pcre_exec()</b>
+are used for compiling and matching regular expressions. A sample program that
+demonstrates the simplest way of using them is given in the file
+<i>pcredemo.c</i>. The <b>pcresample</b> documentation describes how to run it.
+</P>
+<P>
+There are convenience functions for extracting captured substrings from a
+matched subject string. They are:
+</P>
+<P>
+<pre>
+  <b>pcre_copy_substring()</b>
+  <b>pcre_copy_named_substring()</b>
+  <b>pcre_get_substring()</b>
+  <b>pcre_get_named_substring()</b>
+  <b>pcre_get_substring_list()</b>
+</PRE>
+</P>
+<P>
+<b>pcre_free_substring()</b> and <b>pcre_free_substring_list()</b> are also
+provided, to free the memory used for extracted strings.
+</P>
+<P>
+The function <b>pcre_maketables()</b> is used (optionally) to build a set of
+character tables in the current locale for passing to <b>pcre_compile()</b>.
+</P>
+<P>
+The function <b>pcre_fullinfo()</b> is used to find out information about a
+compiled pattern; <b>pcre_info()</b> is an obsolete version which returns only
+some of the available information, but is retained for backwards compatibility.
+The function <b>pcre_version()</b> returns a pointer to a string containing the
+version of PCRE and its date of release.
+</P>
+<P>
+The global variables <b>pcre_malloc</b> and <b>pcre_free</b> initially contain
+the entry points of the standard <b>malloc()</b> and <b>free()</b> functions
+respectively. PCRE calls the memory management functions via these variables,
+so a calling program can replace them if it wishes to intercept the calls. This
+should be done before calling any PCRE functions.
+</P>
+<P>
+The global variables <b>pcre_stack_malloc</b> and <b>pcre_stack_free</b> are also
+indirections to memory management functions. These special functions are used
+only when PCRE is compiled to use the heap for remembering data, instead of
+recursive function calls. This is a non-standard way of building PCRE, for use
+in environments that have limited stacks. Because of the greater use of memory
+management, it runs more slowly. Separate functions are provided so that
+special-purpose external code can be used for this case. When used, these
+functions are always called in a stack-like manner (last obtained, first
+freed), and always for memory blocks of the same size.
+</P>
+<P>
+The global variable <b>pcre_callout</b> initially contains NULL. It can be set
+by the caller to a "callout" function, which PCRE will then call at specified
+points during a matching operation. Details are given in the <b>pcrecallout</b>
+documentation.
+</P>
+<br><a name="SEC3" href="#TOC1">MULTITHREADING</a><br>
+<P>
+The PCRE functions can be used in multi-threading applications, with the
+proviso that the memory management functions pointed to by <b>pcre_malloc</b>,
+<b>pcre_free</b>, <b>pcre_stack_malloc</b>, and <b>pcre_stack_free</b>, and the
+callout function pointed to by <b>pcre_callout</b>, are shared by all threads.
+</P>
+<P>
+The compiled form of a regular expression is not altered during matching, so
+the same compiled pattern can safely be used by several threads at once.
+</P>
+<br><a name="SEC4" href="#TOC1">CHECKING BUILD-TIME OPTIONS</a><br>
+<P>
+<b>int pcre_config(int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<P>
+The function <b>pcre_config()</b> makes it possible for a PCRE client to
+discover which optional features have been compiled into the PCRE library. The
+<a href="pcrebuild.html"><b>pcrebuild</b></a>
+documentation has more details about these optional features.
+</P>
+<P>
+The first argument for <b>pcre_config()</b> is an integer, specifying which
+information is required; the second argument is a pointer to a variable into
+which the information is placed. The following information is available:
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_UTF8
+</PRE>
+</P>
+<P>
+The output is an integer that is set to one if UTF-8 support is available;
+otherwise it is set to zero.
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_NEWLINE
+</PRE>
+</P>
+<P>
+The output is an integer that is set to the value of the code that is used for
+the newline character. It is either linefeed (10) or carriage return (13), and
+should normally be the standard character for your operating system.
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_LINK_SIZE
+</PRE>
+</P>
+<P>
+The output is an integer that contains the number of bytes used for internal
+linkage in compiled regular expressions. The value is 2, 3, or 4. Larger values
+allow larger regular expressions to be compiled, at the expense of slower
+matching. The default value of 2 is sufficient for all but the most massive
+patterns, since it allows the compiled pattern to be up to 64K in size.
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+</PRE>
+</P>
+<P>
+The output is an integer that contains the threshold above which the POSIX
+interface uses <b>malloc()</b> for output vectors. Further details are given in
+the <b>pcreposix</b> documentation.
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_MATCH_LIMIT
+</PRE>
+</P>
+<P>
+The output is an integer that gives the default limit for the number of
+internal matching function calls in a <b>pcre_exec()</b> execution. Further
+details are given with <b>pcre_exec()</b> below.
+</P>
+<P>
+<pre>
+  PCRE_CONFIG_STACKRECURSE
+</PRE>
+</P>
+<P>
+The output is an integer that is set to one if internal recursion is
+implemented by recursive function calls that use the stack to remember their
+state. This is the usual way that PCRE is compiled. The output is zero if PCRE
+was compiled to use blocks of data on the heap instead of recursive function
+calls. In this case, <b>pcre_stack_malloc</b> and <b>pcre_stack_free</b> are
+called to manage memory blocks on the heap, thus avoiding the use of the stack.
+</P>
+<br><a name="SEC5" href="#TOC1">COMPILING A PATTERN</a><br>
+<P>
+<b>pcre *pcre_compile(const char *<i>pattern</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>, int *<i>erroffset</i>,</b>
+<b>const unsigned char *<i>tableptr</i>);</b>
+</P>
+<P>
+The function <b>pcre_compile()</b> is called to compile a pattern into an
+internal form. The pattern is a C string terminated by a binary zero, and
+is passed in the argument <i>pattern</i>. A pointer to a single block of memory
+that is obtained via <b>pcre_malloc</b> is returned. This contains the compiled
+code and related data. The <b>pcre</b> type is defined for the returned block;
+this is a typedef for a structure whose contents are not externally defined. It
+is up to the caller to free the memory when it is no longer required.
+</P>
+<P>
+Although the compiled code of a PCRE regex is relocatable, that is, it does not
+depend on memory location, the complete <b>pcre</b> data block is not
+fully relocatable, because it contains a copy of the <i>tableptr</i> argument,
+which is an address (see below).
+</P>
+<P>
+The <i>options</i> argument contains independent bits that affect the
+compilation. It should be zero if no options are required. Some of the options,
+in particular, those that are compatible with Perl, can also be set and unset
+from within the pattern (see the detailed description of regular expressions
+in the <b>pcrepattern</b> documentation). For these options, the contents of the
+<i>options</i> argument specifies their initial settings at the start of
+compilation and execution. The PCRE_ANCHORED option can be set at the time of
+matching as well as at compile time.
+</P>
+<P>
+If <i>errptr</i> is NULL, <b>pcre_compile()</b> returns NULL immediately.
+Otherwise, if compilation of a pattern fails, <b>pcre_compile()</b> returns
+NULL, and sets the variable pointed to by <i>errptr</i> to point to a textual
+error message. The offset from the start of the pattern to the character where
+the error was discovered is placed in the variable pointed to by
+<i>erroffset</i>, which must not be NULL. If it is, an immediate error is given.
+</P>
+<P>
+If the final argument, <i>tableptr</i>, is NULL, PCRE uses a default set of
+character tables which are built when it is compiled, using the default C
+locale. Otherwise, <i>tableptr</i> must be the result of a call to
+<b>pcre_maketables()</b>. See the section on locale support below.
+</P>
+<P>
+This code fragment shows a typical straightforward call to <b>pcre_compile()</b>:
+</P>
+<P>
+<pre>
+  pcre *re;
+  const char *error;
+  int erroffset;
+  re = pcre_compile(
+    "^A.*Z",          /* the pattern */
+    0,                /* default options */
+    &error,           /* for error message */
+    &erroffset,       /* for error offset */
+    NULL);            /* use default character tables */
+</PRE>
+</P>
+<P>
+The following option bits are defined:
+</P>
+<P>
+<pre>
+  PCRE_ANCHORED
+</PRE>
+</P>
+<P>
+If this bit is set, the pattern is forced to be "anchored", that is, it is
+constrained to match only at the first matching point in the string which is
+being searched (the "subject string"). This effect can also be achieved by
+appropriate constructs in the pattern itself, which is the only way to do it in
+Perl.
+</P>
+<P>
+<pre>
+  PCRE_CASELESS
+</PRE>
+</P>
+<P>
+If this bit is set, letters in the pattern match both upper and lower case
+letters. It is equivalent to Perl's /i option, and it can be changed within a
+pattern by a (?i) option setting.
+</P>
+<P>
+<pre>
+  PCRE_DOLLAR_ENDONLY
+</PRE>
+</P>
+<P>
+If this bit is set, a dollar metacharacter in the pattern matches only at the
+end of the subject string. Without this option, a dollar also matches
+immediately before the final character if it is a newline (but not before any
+other newlines). The PCRE_DOLLAR_ENDONLY option is ignored if PCRE_MULTILINE is
+set. There is no equivalent to this option in Perl, and no way to set it within
+a pattern.
+</P>
+<P>
+<pre>
+  PCRE_DOTALL
+</PRE>
+</P>
+<P>
+If this bit is set, a dot metacharater in the pattern matches all characters,
+including newlines. Without it, newlines are excluded. This option is
+equivalent to Perl's /s option, and it can be changed within a pattern by a
+(?s) option setting. A negative class such as [^a] always matches a newline
+character, independent of the setting of this option.
+</P>
+<P>
+<pre>
+  PCRE_EXTENDED
+</PRE>
+</P>
+<P>
+If this bit is set, whitespace data characters in the pattern are totally
+ignored except when escaped or inside a character class. Whitespace does not
+include the VT character (code 11). In addition, characters between an
+unescaped # outside a character class and the next newline character,
+inclusive, are also ignored. This is equivalent to Perl's /x option, and it can
+be changed within a pattern by a (?x) option setting.
+</P>
+<P>
+This option makes it possible to include comments inside complicated patterns.
+Note, however, that this applies only to data characters. Whitespace characters
+may never appear within special character sequences in a pattern, for example
+within the sequence (?( which introduces a conditional subpattern.
+</P>
+<P>
+<pre>
+  PCRE_EXTRA
+</PRE>
+</P>
+<P>
+This option was invented in order to turn on additional functionality of PCRE
+that is incompatible with Perl, but it is currently of very little use. When
+set, any backslash in a pattern that is followed by a letter that has no
+special meaning causes an error, thus reserving these combinations for future
+expansion. By default, as in Perl, a backslash followed by a letter with no
+special meaning is treated as a literal. There are at present no other features
+controlled by this option. It can also be set by a (?X) option setting within a
+pattern.
+</P>
+<P>
+<pre>
+  PCRE_MULTILINE
+</PRE>
+</P>
+<P>
+By default, PCRE treats the subject string as consisting of a single "line" of
+characters (even if it actually contains several newlines). The "start of line"
+metacharacter (^) matches only at the start of the string, while the "end of
+line" metacharacter ($) matches only at the end of the string, or before a
+terminating newline (unless PCRE_DOLLAR_ENDONLY is set). This is the same as
+Perl.
+</P>
+<P>
+When PCRE_MULTILINE it is set, the "start of line" and "end of line" constructs
+match immediately following or immediately before any newline in the subject
+string, respectively, as well as at the very start and end. This is equivalent
+to Perl's /m option, and it can be changed within a pattern by a (?m) option
+setting. If there are no "\n" characters in a subject string, or no
+occurrences of ^ or $ in a pattern, setting PCRE_MULTILINE has no effect.
+</P>
+<P>
+<pre>
+  PCRE_NO_AUTO_CAPTURE
+</PRE>
+</P>
+<P>
+If this option is set, it disables the use of numbered capturing parentheses in
+the pattern. Any opening parenthesis that is not followed by ? behaves as if it
+were followed by ?: but named parentheses can still be used for capturing (and
+they acquire numbers in the usual way). There is no equivalent of this option
+in Perl.
+</P>
+<P>
+<pre>
+  PCRE_UNGREEDY
+</PRE>
+</P>
+<P>
+This option inverts the "greediness" of the quantifiers so that they are not
+greedy by default, but become greedy if followed by "?". It is not compatible
+with Perl. It can also be set by a (?U) option setting within the pattern.
+</P>
+<P>
+<pre>
+  PCRE_UTF8
+</PRE>
+</P>
+<P>
+This option causes PCRE to regard both the pattern and the subject as strings
+of UTF-8 characters instead of single-byte character strings. However, it is
+available only if PCRE has been built to include UTF-8 support. If not, the use
+of this option provokes an error. Details of how this option changes the
+behaviour of PCRE are given in the
+<a href="pcre.html#utf8support">section on UTF-8 support</a>
+in the main
+<a href="pcre.html"><b>pcre</b></a>
+page.
+</P>
+<P>
+<pre>
+  PCRE_NO_UTF8_CHECK
+</PRE>
+</P>
+<P>
+When PCRE_UTF8 is set, the validity of the pattern as a UTF-8 string is
+automatically checked. If an invalid UTF-8 sequence of bytes is found,
+<b>pcre_compile()</b> returns an error. If you already know that your pattern is
+valid, and you want to skip this check for performance reasons, you can set the
+PCRE_NO_UTF8_CHECK option. When it is set, the effect of passing an invalid
+UTF-8 string as a pattern is undefined. It may cause your program to crash.
+Note that there is a similar option for suppressing the checking of subject
+strings passed to <b>pcre_exec()</b>.
+</P>
+<br><a name="SEC6" href="#TOC1">STUDYING A PATTERN</a><br>
+<P>
+<b>pcre_extra *pcre_study(const pcre *<i>code</i>, int <i>options</i>,</b>
+<b>const char **<i>errptr</i>);</b>
+</P>
+<P>
+When a pattern is going to be used several times, it is worth spending more
+time analyzing it in order to speed up the time taken for matching. The
+function <b>pcre_study()</b> takes a pointer to a compiled pattern as its first
+argument. If studing the pattern produces additional information that will help
+speed up matching, <b>pcre_study()</b> returns a pointer to a <b>pcre_extra</b>
+block, in which the <i>study_data</i> field points to the results of the study.
+</P>
+<P>
+The returned value from a <b>pcre_study()</b> can be passed directly to
+<b>pcre_exec()</b>. However, the <b>pcre_extra</b> block also contains other
+fields that can be set by the caller before the block is passed; these are
+described below. If studying the pattern does not produce any additional
+information, <b>pcre_study()</b> returns NULL. In that circumstance, if the
+calling program wants to pass some of the other fields to <b>pcre_exec()</b>, it
+must set up its own <b>pcre_extra</b> block.
+</P>
+<P>
+The second argument contains option bits. At present, no options are defined
+for <b>pcre_study()</b>, and this argument should always be zero.
+</P>
+<P>
+The third argument for <b>pcre_study()</b> is a pointer for an error message. If
+studying succeeds (even if no data is returned), the variable it points to is
+set to NULL. Otherwise it points to a textual error message. You should
+therefore test the error pointer for NULL after calling <b>pcre_study()</b>, to
+be sure that it has run successfully.
+</P>
+<P>
+This is a typical call to <b>pcre_study</b>():
+</P>
+<P>
+<pre>
+  pcre_extra *pe;
+  pe = pcre_study(
+    re,             /* result of pcre_compile() */
+    0,              /* no options exist */
+    &error);        /* set to NULL or points to a message */
+</PRE>
+</P>
+<P>
+At present, studying a pattern is useful only for non-anchored patterns that do
+not have a single fixed starting character. A bitmap of possible starting
+characters is created.
+</P>
+<a name="localesupport"></a><br><a name="SEC7" href="#TOC1">LOCALE SUPPORT</a><br>
+<P>
+PCRE handles caseless matching, and determines whether characters are letters,
+digits, or whatever, by reference to a set of tables. When running in UTF-8
+mode, this applies only to characters with codes less than 256. The library
+contains a default set of tables that is created in the default C locale when
+PCRE is compiled. This is used when the final argument of <b>pcre_compile()</b>
+is NULL, and is sufficient for many applications.
+</P>
+<P>
+An alternative set of tables can, however, be supplied. Such tables are built
+by calling the <b>pcre_maketables()</b> function, which has no arguments, in the
+relevant locale. The result can then be passed to <b>pcre_compile()</b> as often
+as necessary. For example, to build and use tables that are appropriate for the
+French locale (where accented characters with codes greater than 128 are
+treated as letters), the following code could be used:
+</P>
+<P>
+<pre>
+  setlocale(LC_CTYPE, "fr");
+  tables = pcre_maketables();
+  re = pcre_compile(..., tables);
+</PRE>
+</P>
+<P>
+The tables are built in memory that is obtained via <b>pcre_malloc</b>. The
+pointer that is passed to <b>pcre_compile</b> is saved with the compiled
+pattern, and the same tables are used via this pointer by <b>pcre_study()</b>
+and <b>pcre_exec()</b>. Thus, for any single pattern, compilation, studying and
+matching all happen in the same locale, but different patterns can be compiled
+in different locales. It is the caller's responsibility to ensure that the
+memory containing the tables remains available for as long as it is needed.
+</P>
+<br><a name="SEC8" href="#TOC1">INFORMATION ABOUT A PATTERN</a><br>
+<P>
+<b>int pcre_fullinfo(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>int <i>what</i>, void *<i>where</i>);</b>
+</P>
+<P>
+The <b>pcre_fullinfo()</b> function returns information about a compiled
+pattern. It replaces the obsolete <b>pcre_info()</b> function, which is
+nevertheless retained for backwards compability (and is documented below).
+</P>
+<P>
+The first argument for <b>pcre_fullinfo()</b> is a pointer to the compiled
+pattern. The second argument is the result of <b>pcre_study()</b>, or NULL if
+the pattern was not studied. The third argument specifies which piece of
+information is required, and the fourth argument is a pointer to a variable
+to receive the data. The yield of the function is zero for success, or one of
+the following negative numbers:
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NULL       the argument <i>code</i> was NULL
+                        the argument <i>where</i> was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+  PCRE_ERROR_BADOPTION  the value of <i>what</i> was invalid
+</PRE>
+</P>
+<P>
+Here is a typical call of <b>pcre_fullinfo()</b>, to obtain the length of the
+compiled pattern:
+</P>
+<P>
+<pre>
+  int rc;
+  unsigned long int length;
+  rc = pcre_fullinfo(
+    re,               /* result of pcre_compile() */
+    pe,               /* result of pcre_study(), or NULL */
+    PCRE_INFO_SIZE,   /* what is required */
+    &length);         /* where to put the data */
+</PRE>
+</P>
+<P>
+The possible values for the third argument are defined in <b>pcre.h</b>, and are
+as follows:
+</P>
+<P>
+<pre>
+  PCRE_INFO_BACKREFMAX
+</PRE>
+</P>
+<P>
+Return the number of the highest back reference in the pattern. The fourth
+argument should point to an <b>int</b> variable. Zero is returned if there are
+no back references.
+</P>
+<P>
+<pre>
+  PCRE_INFO_CAPTURECOUNT
+</PRE>
+</P>
+<P>
+Return the number of capturing subpatterns in the pattern. The fourth argument
+should point to an \fbint\fR variable.
+</P>
+<P>
+<pre>
+  PCRE_INFO_FIRSTBYTE
+</PRE>
+</P>
+<P>
+Return information about the first byte of any matched string, for a
+non-anchored pattern. (This option used to be called PCRE_INFO_FIRSTCHAR; the
+old name is still recognized for backwards compatibility.)
+</P>
+<P>
+If there is a fixed first byte, e.g. from a pattern such as (cat|cow|coyote),
+it is returned in the integer pointed to by <i>where</i>. Otherwise, if either
+</P>
+<P>
+(a) the pattern was compiled with the PCRE_MULTILINE option, and every branch
+starts with "^", or
+</P>
+<P>
+(b) every branch of the pattern starts with ".*" and PCRE_DOTALL is not set
+(if it were set, the pattern would be anchored),
+</P>
+<P>
+-1 is returned, indicating that the pattern matches only at the start of a
+subject string or after any newline within the string. Otherwise -2 is
+returned. For anchored patterns, -2 is returned.
+</P>
+<P>
+<pre>
+  PCRE_INFO_FIRSTTABLE
+</PRE>
+</P>
+<P>
+If the pattern was studied, and this resulted in the construction of a 256-bit
+table indicating a fixed set of bytes for the first byte in any matching
+string, a pointer to the table is returned. Otherwise NULL is returned. The
+fourth argument should point to an <b>unsigned char *</b> variable.
+</P>
+<P>
+<pre>
+  PCRE_INFO_LASTLITERAL
+</PRE>
+</P>
+<P>
+Return the value of the rightmost literal byte that must exist in any matched
+string, other than at its start, if such a byte has been recorded. The fourth
+argument should point to an <b>int</b> variable. If there is no such byte, -1 is
+returned. For anchored patterns, a last literal byte is recorded only if it
+follows something of variable length. For example, for the pattern
+/^a\d+z\d+/ the returned value is "z", but for /^a\dz\d/ the returned value
+is -1.
+</P>
+<P>
+<pre>
+  PCRE_INFO_NAMECOUNT
+  PCRE_INFO_NAMEENTRYSIZE
+  PCRE_INFO_NAMETABLE
+</PRE>
+</P>
+<P>
+PCRE supports the use of named as well as numbered capturing parentheses. The
+names are just an additional way of identifying the parentheses, which still
+acquire a number. A caller that wants to extract data from a named subpattern
+must convert the name to a number in order to access the correct pointers in
+the output vector (described with <b>pcre_exec()</b> below). In order to do
+this, it must first use these three values to obtain the name-to-number mapping
+table for the pattern.
+</P>
+<P>
+The map consists of a number of fixed-size entries. PCRE_INFO_NAMECOUNT gives
+the number of entries, and PCRE_INFO_NAMEENTRYSIZE gives the size of each
+entry; both of these return an <b>int</b> value. The entry size depends on the
+length of the longest name. PCRE_INFO_NAMETABLE returns a pointer to the first
+entry of the table (a pointer to <b>char</b>). The first two bytes of each entry
+are the number of the capturing parenthesis, most significant byte first. The
+rest of the entry is the corresponding name, zero terminated. The names are in
+alphabetical order. For example, consider the following pattern (assume
+PCRE_EXTENDED is set, so white space - including newlines - is ignored):
+</P>
+<P>
+<pre>
+  (?P&#60;date&#62; (?P&#60;year&#62;(\d\d)?\d\d) -
+  (?P&#60;month&#62;\d\d) - (?P&#60;day&#62;\d\d) )
+</PRE>
+</P>
+<P>
+There are four named subpatterns, so the table has four entries, and each entry
+in the table is eight bytes long. The table is as follows, with non-printing
+bytes shows in hex, and undefined bytes shown as ??:
+</P>
+<P>
+<pre>
+  00 01 d  a  t  e  00 ??
+  00 05 d  a  y  00 ?? ??
+  00 04 m  o  n  t  h  00
+  00 02 y  e  a  r  00 ??
+</PRE>
+</P>
+<P>
+When writing code to extract data from named subpatterns, remember that the
+length of each entry may be different for each compiled pattern.
+</P>
+<P>
+<pre>
+  PCRE_INFO_OPTIONS
+</PRE>
+</P>
+<P>
+Return a copy of the options with which the pattern was compiled. The fourth
+argument should point to an <b>unsigned long int</b> variable. These option bits
+are those specified in the call to <b>pcre_compile()</b>, modified by any
+top-level option settings within the pattern itself.
+</P>
+<P>
+A pattern is automatically anchored by PCRE if all of its top-level
+alternatives begin with one of the following:
+</P>
+<P>
+<pre>
+  ^     unless PCRE_MULTILINE is set
+  \A    always
+  \G    always
+  .*    if PCRE_DOTALL is set and there are no back
+          references to the subpattern in which .* appears
+</PRE>
+</P>
+<P>
+For such patterns, the PCRE_ANCHORED bit is set in the options returned by
+<b>pcre_fullinfo()</b>.
+</P>
+<P>
+<pre>
+  PCRE_INFO_SIZE
+</PRE>
+</P>
+<P>
+Return the size of the compiled pattern, that is, the value that was passed as
+the argument to <b>pcre_malloc()</b> when PCRE was getting memory in which to
+place the compiled data. The fourth argument should point to a <b>size_t</b>
+variable.
+</P>
+<P>
+<pre>
+  PCRE_INFO_STUDYSIZE
+</PRE>
+</P>
+<P>
+Returns the size of the data block pointed to by the <i>study_data</i> field in
+a <b>pcre_extra</b> block. That is, it is the value that was passed to
+<b>pcre_malloc()</b> when PCRE was getting memory into which to place the data
+created by <b>pcre_study()</b>. The fourth argument should point to a
+<b>size_t</b> variable.
+</P>
+<br><a name="SEC9" href="#TOC1">OBSOLETE INFO FUNCTION</a><br>
+<P>
+<b>int pcre_info(const pcre *<i>code</i>, int *<i>optptr</i>, int</b>
+<b>*<i>firstcharptr</i>);</b>
+</P>
+<P>
+The <b>pcre_info()</b> function is now obsolete because its interface is too
+restrictive to return all the available data about a compiled pattern. New
+programs should use <b>pcre_fullinfo()</b> instead. The yield of
+<b>pcre_info()</b> is the number of capturing subpatterns, or one of the
+following negative numbers:
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NULL       the argument <i>code</i> was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+</PRE>
+</P>
+<P>
+If the <i>optptr</i> argument is not NULL, a copy of the options with which the
+pattern was compiled is placed in the integer it points to (see
+PCRE_INFO_OPTIONS above).
+</P>
+<P>
+If the pattern is not anchored and the <i>firstcharptr</i> argument is not NULL,
+it is used to pass back information about the first character of any matched
+string (see PCRE_INFO_FIRSTBYTE above).
+</P>
+<br><a name="SEC10" href="#TOC1">MATCHING A PATTERN</a><br>
+<P>
+<b>int pcre_exec(const pcre *<i>code</i>, const pcre_extra *<i>extra</i>,</b>
+<b>const char *<i>subject</i>, int <i>length</i>, int <i>startoffset</i>,</b>
+<b>int <i>options</i>, int *<i>ovector</i>, int <i>ovecsize</i>);</b>
+</P>
+<P>
+The function <b>pcre_exec()</b> is called to match a subject string against a
+pre-compiled pattern, which is passed in the <i>code</i> argument. If the
+pattern has been studied, the result of the study should be passed in the
+<i>extra</i> argument.
+</P>
+<P>
+Here is an example of a simple call to <b>pcre_exec()</b>:
+</P>
+<P>
+<pre>
+  int rc;
+  int ovector[30];
+  rc = pcre_exec(
+    re,             /* result of pcre_compile() */
+    NULL,           /* we didn't study the pattern */
+    "some string",  /* the subject string */
+    11,             /* the length of the subject string */
+    0,              /* start at offset 0 in the subject */
+    0,              /* default options */
+    ovector,        /* vector for substring information */
+    30);            /* number of elements in the vector */
+</PRE>
+</P>
+<P>
+If the <i>extra</i> argument is not NULL, it must point to a <b>pcre_extra</b>
+data block. The <b>pcre_study()</b> function returns such a block (when it
+doesn't return NULL), but you can also create one for yourself, and pass
+additional information in it. The fields in the block are as follows:
+</P>
+<P>
+<pre>
+  unsigned long int <i>flags</i>;
+  void *<i>study_data</i>;
+  unsigned long int <i>match_limit</i>;
+  void *<i>callout_data</i>;
+</PRE>
+</P>
+<P>
+The <i>flags</i> field is a bitmap that specifies which of the other fields
+are set. The flag bits are:
+</P>
+<P>
+<pre>
+  PCRE_EXTRA_STUDY_DATA
+  PCRE_EXTRA_MATCH_LIMIT
+  PCRE_EXTRA_CALLOUT_DATA
+</PRE>
+</P>
+<P>
+Other flag bits should be set to zero. The <i>study_data</i> field is set in the
+<b>pcre_extra</b> block that is returned by <b>pcre_study()</b>, together with
+the appropriate flag bit. You should not set this yourself, but you can add to
+the block by setting the other fields.
+</P>
+<P>
+The <i>match_limit</i> field provides a means of preventing PCRE from using up a
+vast amount of resources when running patterns that are not going to match,
+but which have a very large number of possibilities in their search trees. The
+classic example is the use of nested unlimited repeats. Internally, PCRE uses a
+function called <b>match()</b> which it calls repeatedly (sometimes
+recursively). The limit is imposed on the number of times this function is
+called during a match, which has the effect of limiting the amount of recursion
+and backtracking that can take place. For patterns that are not anchored, the
+count starts from zero for each position in the subject string.
+</P>
+<P>
+The default limit for the library can be set when PCRE is built; the default
+default is 10 million, which handles all but the most extreme cases. You can
+reduce the default by suppling <b>pcre_exec()</b> with a \fRpcre_extra\fR block
+in which <i>match_limit</i> is set to a smaller value, and
+PCRE_EXTRA_MATCH_LIMIT is set in the <i>flags</i> field. If the limit is
+exceeded, <b>pcre_exec()</b> returns PCRE_ERROR_MATCHLIMIT.
+</P>
+<P>
+The <i>pcre_callout</i> field is used in conjunction with the "callout" feature,
+which is described in the <b>pcrecallout</b> documentation.
+</P>
+<P>
+The PCRE_ANCHORED option can be passed in the <i>options</i> argument, whose
+unused bits must be zero. This limits <b>pcre_exec()</b> to matching at the
+first matching position. However, if a pattern was compiled with PCRE_ANCHORED,
+or turned out to be anchored by virtue of its contents, it cannot be made
+unachored at matching time.
+</P>
+<P>
+When PCRE_UTF8 was set at compile time, the validity of the subject as a UTF-8
+string is automatically checked, and the value of <i>startoffset</i> is also
+checked to ensure that it points to the start of a UTF-8 character. If an
+invalid UTF-8 sequence of bytes is found, <b>pcre_exec()</b> returns the error
+PCRE_ERROR_BADUTF8. If <i>startoffset</i> contains an invalid value,
+PCRE_ERROR_BADUTF8_OFFSET is returned.
+</P>
+<P>
+If you already know that your subject is valid, and you want to skip these
+checks for performance reasons, you can set the PCRE_NO_UTF8_CHECK option when
+calling <b>pcre_exec()</b>. You might want to do this for the second and
+subsequent calls to <b>pcre_exec()</b> if you are making repeated calls to find
+all the matches in a single subject string. However, you should be sure that
+the value of <i>startoffset</i> points to the start of a UTF-8 character. When
+PCRE_NO_UTF8_CHECK is set, the effect of passing an invalid UTF-8 string as a
+subject, or a value of <i>startoffset</i> that does not point to the start of a
+UTF-8 character, is undefined. Your program may crash.
+</P>
+<P>
+There are also three further options that can be set only at matching time:
+</P>
+<P>
+<pre>
+  PCRE_NOTBOL
+</PRE>
+</P>
+<P>
+The first character of the string is not the beginning of a line, so the
+circumflex metacharacter should not match before it. Setting this without
+PCRE_MULTILINE (at compile time) causes circumflex never to match.
+</P>
+<P>
+<pre>
+  PCRE_NOTEOL
+</PRE>
+</P>
+<P>
+The end of the string is not the end of a line, so the dollar metacharacter
+should not match it nor (except in multiline mode) a newline immediately before
+it. Setting this without PCRE_MULTILINE (at compile time) causes dollar never
+to match.
+</P>
+<P>
+<pre>
+  PCRE_NOTEMPTY
+</PRE>
+</P>
+<P>
+An empty string is not considered to be a valid match if this option is set. If
+there are alternatives in the pattern, they are tried. If all the alternatives
+match the empty string, the entire match fails. For example, if the pattern
+</P>
+<P>
+<pre>
+  a?b?
+</PRE>
+</P>
+<P>
+is applied to a string not beginning with "a" or "b", it matches the empty
+string at the start of the subject. With PCRE_NOTEMPTY set, this match is not
+valid, so PCRE searches further into the string for occurrences of "a" or "b".
+</P>
+<P>
+Perl has no direct equivalent of PCRE_NOTEMPTY, but it does make a special case
+of a pattern match of the empty string within its <b>split()</b> function, and
+when using the /g modifier. It is possible to emulate Perl's behaviour after
+matching a null string by first trying the match again at the same offset with
+PCRE_NOTEMPTY set, and then if that fails by advancing the starting offset (see
+below) and trying an ordinary match again.
+</P>
+<P>
+The subject string is passed to <b>pcre_exec()</b> as a pointer in
+<i>subject</i>, a length in <i>length</i>, and a starting byte offset in
+<i>startoffset</i>. Unlike the pattern string, the subject may contain binary
+zero bytes. When the starting offset is zero, the search for a match starts at
+the beginning of the subject, and this is by far the most common case.
+</P>
+<P>
+If the pattern was compiled with the PCRE_UTF8 option, the subject must be a
+sequence of bytes that is a valid UTF-8 string, and the starting offset must
+point to the beginning of a UTF-8 character. If an invalid UTF-8 string or
+offset is passed, an error (either PCRE_ERROR_BADUTF8 or
+PCRE_ERROR_BADUTF8_OFFSET) is returned, unless the option PCRE_NO_UTF8_CHECK is
+set, in which case PCRE's behaviour is not defined.
+</P>
+<P>
+A non-zero starting offset is useful when searching for another match in the
+same subject by calling <b>pcre_exec()</b> again after a previous success.
+Setting <i>startoffset</i> differs from just passing over a shortened string and
+setting PCRE_NOTBOL in the case of a pattern that begins with any kind of
+lookbehind. For example, consider the pattern
+</P>
+<P>
+<pre>
+  \Biss\B
+</PRE>
+</P>
+<P>
+which finds occurrences of "iss" in the middle of words. (\B matches only if
+the current position in the subject is not a word boundary.) When applied to
+the string "Mississipi" the first call to <b>pcre_exec()</b> finds the first
+occurrence. If <b>pcre_exec()</b> is called again with just the remainder of the
+subject, namely "issipi", it does not match, because \B is always false at the
+start of the subject, which is deemed to be a word boundary. However, if
+<b>pcre_exec()</b> is passed the entire string again, but with <i>startoffset</i>
+set to 4, it finds the second occurrence of "iss" because it is able to look
+behind the starting point to discover that it is preceded by a letter.
+</P>
+<P>
+If a non-zero starting offset is passed when the pattern is anchored, one
+attempt to match at the given offset is tried. This can only succeed if the
+pattern does not require the match to be at the start of the subject.
+</P>
+<P>
+In general, a pattern matches a certain portion of the subject, and in
+addition, further substrings from the subject may be picked out by parts of the
+pattern. Following the usage in Jeffrey Friedl's book, this is called
+"capturing" in what follows, and the phrase "capturing subpattern" is used for
+a fragment of a pattern that picks out a substring. PCRE supports several other
+kinds of parenthesized subpattern that do not cause substrings to be captured.
+</P>
+<P>
+Captured substrings are returned to the caller via a vector of integer offsets
+whose address is passed in <i>ovector</i>. The number of elements in the vector
+is passed in <i>ovecsize</i>. The first two-thirds of the vector is used to pass
+back captured substrings, each substring using a pair of integers. The
+remaining third of the vector is used as workspace by <b>pcre_exec()</b> while
+matching capturing subpatterns, and is not available for passing back
+information. The length passed in <i>ovecsize</i> should always be a multiple of
+three. If it is not, it is rounded down.
+</P>
+<P>
+When a match has been successful, information about captured substrings is
+returned in pairs of integers, starting at the beginning of <i>ovector</i>, and
+continuing up to two-thirds of its length at the most. The first element of a
+pair is set to the offset of the first character in a substring, and the second
+is set to the offset of the first character after the end of a substring. The
+first pair, <i>ovector[0]</i> and <i>ovector[1]</i>, identify the portion of the
+subject string matched by the entire pattern. The next pair is used for the
+first capturing subpattern, and so on. The value returned by <b>pcre_exec()</b>
+is the number of pairs that have been set. If there are no capturing
+subpatterns, the return value from a successful match is 1, indicating that
+just the first pair of offsets has been set.
+</P>
+<P>
+Some convenience functions are provided for extracting the captured substrings
+as separate strings. These are described in the following section.
+</P>
+<P>
+It is possible for an capturing subpattern number <i>n+1</i> to match some
+part of the subject when subpattern <i>n</i> has not been used at all. For
+example, if the string "abc" is matched against the pattern (a|(z))(bc)
+subpatterns 1 and 3 are matched, but 2 is not. When this happens, both offset
+values corresponding to the unused subpattern are set to -1.
+</P>
+<P>
+If a capturing subpattern is matched repeatedly, it is the last portion of the
+string that it matched that gets returned.
+</P>
+<P>
+If the vector is too small to hold all the captured substrings, it is used as
+far as possible (up to two-thirds of its length), and the function returns a
+value of zero. In particular, if the substring offsets are not of interest,
+<b>pcre_exec()</b> may be called with <i>ovector</i> passed as NULL and
+<i>ovecsize</i> as zero. However, if the pattern contains back references and
+the <i>ovector</i> isn't big enough to remember the related substrings, PCRE has
+to get additional memory for use during matching. Thus it is usually advisable
+to supply an <i>ovector</i>.
+</P>
+<P>
+Note that <b>pcre_info()</b> can be used to find out how many capturing
+subpatterns there are in a compiled pattern. The smallest size for
+<i>ovector</i> that will allow for <i>n</i> captured substrings, in addition to
+the offsets of the substring matched by the whole pattern, is (<i>n</i>+1)*3.
+</P>
+<P>
+If <b>pcre_exec()</b> fails, it returns a negative number. The following are
+defined in the header file:
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOMATCH        (-1)
+</PRE>
+</P>
+<P>
+The subject string did not match the pattern.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NULL           (-2)
+</PRE>
+</P>
+<P>
+Either <i>code</i> or <i>subject</i> was passed as NULL, or <i>ovector</i> was
+NULL and <i>ovecsize</i> was not zero.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_BADOPTION      (-3)
+</PRE>
+</P>
+<P>
+An unrecognized bit was set in the <i>options</i> argument.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_BADMAGIC       (-4)
+</PRE>
+</P>
+<P>
+PCRE stores a 4-byte "magic number" at the start of the compiled code, to catch
+the case when it is passed a junk pointer. This is the error it gives when the
+magic number isn't present.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_UNKNOWN_NODE   (-5)
+</PRE>
+</P>
+<P>
+While running the pattern match, an unknown item was encountered in the
+compiled pattern. This error could be caused by a bug in PCRE or by overwriting
+of the compiled pattern.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOMEMORY       (-6)
+</PRE>
+</P>
+<P>
+If a pattern contains back references, but the <i>ovector</i> that is passed to
+<b>pcre_exec()</b> is not big enough to remember the referenced substrings, PCRE
+gets a block of memory at the start of matching to use for this purpose. If the
+call via <b>pcre_malloc()</b> fails, this error is given. The memory is freed at
+the end of matching.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOSUBSTRING    (-7)
+</PRE>
+</P>
+<P>
+This error is used by the <b>pcre_copy_substring()</b>,
+<b>pcre_get_substring()</b>, and <b>pcre_get_substring_list()</b> functions (see
+below). It is never returned by <b>pcre_exec()</b>.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_MATCHLIMIT     (-8)
+</PRE>
+</P>
+<P>
+The recursion and backtracking limit, as specified by the <i>match_limit</i>
+field in a <b>pcre_extra</b> structure (or defaulted) was reached. See the
+description above.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_CALLOUT        (-9)
+</PRE>
+</P>
+<P>
+This error is never generated by <b>pcre_exec()</b> itself. It is provided for
+use by callout functions that want to yield a distinctive error code. See the
+<b>pcrecallout</b> documentation for details.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_BADUTF8        (-10)
+</PRE>
+</P>
+<P>
+A string that contains an invalid UTF-8 byte sequence was passed as a subject.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_BADUTF8_OFFSET (-11)
+</PRE>
+</P>
+<P>
+The UTF-8 byte sequence that was passed as a subject was valid, but the value
+of <i>startoffset</i> did not point to the beginning of a UTF-8 character.
+</P>
+<br><a name="SEC11" href="#TOC1">EXTRACTING CAPTURED SUBSTRINGS BY NUMBER</a><br>
+<P>
+<b>int pcre_copy_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>, char *<i>buffer</i>,</b>
+<b>int <i>buffersize</i>);</b>
+</P>
+<P>
+<b>int pcre_get_substring(const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, int <i>stringnumber</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<P>
+<b>int pcre_get_substring_list(const char *<i>subject</i>,</b>
+<b>int *<i>ovector</i>, int <i>stringcount</i>, const char ***<i>listptr</i>);</b>
+</P>
+<P>
+Captured substrings can be accessed directly by using the offsets returned by
+<b>pcre_exec()</b> in <i>ovector</i>. For convenience, the functions
+<b>pcre_copy_substring()</b>, <b>pcre_get_substring()</b>, and
+<b>pcre_get_substring_list()</b> are provided for extracting captured substrings
+as new, separate, zero-terminated strings. These functions identify substrings
+by number. The next section describes functions for extracting named
+substrings. A substring that contains a binary zero is correctly extracted and
+has a further zero added on the end, but the result is not, of course,
+a C string.
+</P>
+<P>
+The first three arguments are the same for all three of these functions:
+<i>subject</i> is the subject string which has just been successfully matched,
+<i>ovector</i> is a pointer to the vector of integer offsets that was passed to
+<b>pcre_exec()</b>, and <i>stringcount</i> is the number of substrings that were
+captured by the match, including the substring that matched the entire regular
+expression. This is the value returned by <b>pcre_exec</b> if it is greater than
+zero. If <b>pcre_exec()</b> returned zero, indicating that it ran out of space
+in <i>ovector</i>, the value passed as <i>stringcount</i> should be the size of
+the vector divided by three.
+</P>
+<P>
+The functions <b>pcre_copy_substring()</b> and <b>pcre_get_substring()</b>
+extract a single substring, whose number is given as <i>stringnumber</i>. A
+value of zero extracts the substring that matched the entire pattern, while
+higher values extract the captured substrings. For <b>pcre_copy_substring()</b>,
+the string is placed in <i>buffer</i>, whose length is given by
+<i>buffersize</i>, while for <b>pcre_get_substring()</b> a new block of memory is
+obtained via <b>pcre_malloc</b>, and its address is returned via
+<i>stringptr</i>. The yield of the function is the length of the string, not
+including the terminating zero, or one of
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOMEMORY       (-6)
+</PRE>
+</P>
+<P>
+The buffer was too small for <b>pcre_copy_substring()</b>, or the attempt to get
+memory failed for <b>pcre_get_substring()</b>.
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOSUBSTRING    (-7)
+</PRE>
+</P>
+<P>
+There is no substring whose number is <i>stringnumber</i>.
+</P>
+<P>
+The <b>pcre_get_substring_list()</b> function extracts all available substrings
+and builds a list of pointers to them. All this is done in a single block of
+memory which is obtained via <b>pcre_malloc</b>. The address of the memory block
+is returned via <i>listptr</i>, which is also the start of the list of string
+pointers. The end of the list is marked by a NULL pointer. The yield of the
+function is zero if all went well, or
+</P>
+<P>
+<pre>
+  PCRE_ERROR_NOMEMORY       (-6)
+</PRE>
+</P>
+<P>
+if the attempt to get the memory block failed.
+</P>
+<P>
+When any of these functions encounter a substring that is unset, which can
+happen when capturing subpattern number <i>n+1</i> matches some part of the
+subject, but subpattern <i>n</i> has not been used at all, they return an empty
+string. This can be distinguished from a genuine zero-length substring by
+inspecting the appropriate offset in <i>ovector</i>, which is negative for unset
+substrings.
+</P>
+<P>
+The two convenience functions <b>pcre_free_substring()</b> and
+<b>pcre_free_substring_list()</b> can be used to free the memory returned by
+a previous call of <b>pcre_get_substring()</b> or
+<b>pcre_get_substring_list()</b>, respectively. They do nothing more than call
+the function pointed to by <b>pcre_free</b>, which of course could be called
+directly from a C program. However, PCRE is used in some situations where it is
+linked via a special interface to another programming language which cannot use
+<b>pcre_free</b> directly; it is for these cases that the functions are
+provided.
+</P>
+<br><a name="SEC12" href="#TOC1">EXTRACTING CAPTURED SUBSTRINGS BY NAME</a><br>
+<P>
+<b>int pcre_copy_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>char *<i>buffer</i>, int <i>buffersize</i>);</b>
+</P>
+<P>
+<b>int pcre_get_stringnumber(const pcre *<i>code</i>,</b>
+<b>const char *<i>name</i>);</b>
+</P>
+<P>
+<b>int pcre_get_named_substring(const pcre *<i>code</i>,</b>
+<b>const char *<i>subject</i>, int *<i>ovector</i>,</b>
+<b>int <i>stringcount</i>, const char *<i>stringname</i>,</b>
+<b>const char **<i>stringptr</i>);</b>
+</P>
+<P>
+To extract a substring by name, you first have to find associated number. This
+can be done by calling <b>pcre_get_stringnumber()</b>. The first argument is the
+compiled pattern, and the second is the name. For example, for this pattern
+</P>
+<P>
+<pre>
+  ab(?&#60;xxx&#62;\d+)...
+</PRE>
+</P>
+<P>
+the number of the subpattern called "xxx" is 1. Given the number, you can then
+extract the substring directly, or use one of the functions described in the
+previous section. For convenience, there are also two functions that do the
+whole job.
+</P>
+<P>
+Most of the arguments of <i>pcre_copy_named_substring()</i> and
+<i>pcre_get_named_substring()</i> are the same as those for the functions that
+extract by number, and so are not re-described here. There are just two
+differences.
+</P>
+<P>
+First, instead of a substring number, a substring name is given. Second, there
+is an extra argument, given at the start, which is a pointer to the compiled
+pattern. This is needed in order to gain access to the name-to-number
+translation table.
+</P>
+<P>
+These functions call <b>pcre_get_stringnumber()</b>, and if it succeeds, they
+then call <i>pcre_copy_substring()</i> or <i>pcre_get_substring()</i>, as
+appropriate.
+</P>
+<P>
+Last updated: 09 December 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcrebuild.html b/external-libs/pcre/doc/html/pcrebuild.html
new file mode 100644
index 00000000..c70f8221
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcrebuild.html
@@ -0,0 +1,189 @@
+<html>
+<head>
+<title>pcrebuild specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">PCRE BUILD-TIME OPTIONS</a>
+<li><a name="TOC2" href="#SEC2">UTF-8 SUPPORT</a>
+<li><a name="TOC3" href="#SEC3">CODE VALUE OF NEWLINE</a>
+<li><a name="TOC4" href="#SEC4">BUILDING SHARED AND STATIC LIBRARIES</a>
+<li><a name="TOC5" href="#SEC5">POSIX MALLOC USAGE</a>
+<li><a name="TOC6" href="#SEC6">LIMITING PCRE RESOURCE USAGE</a>
+<li><a name="TOC7" href="#SEC7">HANDLING VERY LARGE PATTERNS</a>
+<li><a name="TOC8" href="#SEC8">AVOIDING EXCESSIVE STACK USAGE</a>
+<li><a name="TOC9" href="#SEC9">USING EBCDIC CODE</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">PCRE BUILD-TIME OPTIONS</a><br>
+<P>
+This document describes the optional features of PCRE that can be selected when
+the library is compiled. They are all selected, or deselected, by providing
+options to the <b>configure</b> script which is run before the <b>make</b>
+command. The complete list of options for <b>configure</b> (which includes the
+standard ones such as the selection of the installation directory) can be
+obtained by running
+</P>
+<P>
+<pre>
+  ./configure --help
+</PRE>
+</P>
+<P>
+The following sections describe certain options whose names begin with --enable
+or --disable. These settings specify changes to the defaults for the
+<b>configure</b> command. Because of the way that <b>configure</b> works,
+--enable and --disable always come in pairs, so the complementary option always
+exists as well, but as it specifies the default, it is not described.
+</P>
+<br><a name="SEC2" href="#TOC1">UTF-8 SUPPORT</a><br>
+<P>
+To build PCRE with support for UTF-8 character strings, add
+</P>
+<P>
+<pre>
+  --enable-utf8
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command. Of itself, this does not make PCRE treat
+strings as UTF-8. As well as compiling PCRE with this option, you also have
+have to set the PCRE_UTF8 option when you call the <b>pcre_compile()</b>
+function.
+</P>
+<br><a name="SEC3" href="#TOC1">CODE VALUE OF NEWLINE</a><br>
+<P>
+By default, PCRE treats character 10 (linefeed) as the newline character. This
+is the normal newline character on Unix-like systems. You can compile PCRE to
+use character 13 (carriage return) instead by adding
+</P>
+<P>
+<pre>
+  --enable-newline-is-cr
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command. For completeness there is also a
+--enable-newline-is-lf option, which explicitly specifies linefeed as the
+newline character.
+</P>
+<br><a name="SEC4" href="#TOC1">BUILDING SHARED AND STATIC LIBRARIES</a><br>
+<P>
+The PCRE building process uses <b>libtool</b> to build both shared and static
+Unix libraries by default. You can suppress one of these by adding one of
+</P>
+<P>
+<pre>
+  --disable-shared
+  --disable-static
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command, as required.
+</P>
+<br><a name="SEC5" href="#TOC1">POSIX MALLOC USAGE</a><br>
+<P>
+When PCRE is called through the POSIX interface (see the <b>pcreposix</b>
+documentation), additional working storage is required for holding the pointers
+to capturing substrings because PCRE requires three integers per substring,
+whereas the POSIX interface provides only two. If the number of expected
+substrings is small, the wrapper function uses space on the stack, because this
+is faster than using <b>malloc()</b> for each call. The default threshold above
+which the stack is no longer used is 10; it can be changed by adding a setting
+such as
+</P>
+<P>
+<pre>
+  --with-posix-malloc-threshold=20
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command.
+</P>
+<br><a name="SEC6" href="#TOC1">LIMITING PCRE RESOURCE USAGE</a><br>
+<P>
+Internally, PCRE has a function called <b>match()</b> which it calls repeatedly
+(possibly recursively) when performing a matching operation. By limiting the
+number of times this function may be called, a limit can be placed on the
+resources used by a single call to <b>pcre_exec()</b>. The limit can be changed
+at run time, as described in the <b>pcreapi</b> documentation. The default is 10
+million, but this can be changed by adding a setting such as
+</P>
+<P>
+<pre>
+  --with-match-limit=500000
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command.
+</P>
+<br><a name="SEC7" href="#TOC1">HANDLING VERY LARGE PATTERNS</a><br>
+<P>
+Within a compiled pattern, offset values are used to point from one part to
+another (for example, from an opening parenthesis to an alternation
+metacharacter). By default two-byte values are used for these offsets, leading
+to a maximum size for a compiled pattern of around 64K. This is sufficient to
+handle all but the most gigantic patterns. Nevertheless, some people do want to
+process enormous patterns, so it is possible to compile PCRE to use three-byte
+or four-byte offsets by adding a setting such as
+</P>
+<P>
+<pre>
+  --with-link-size=3
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command. The value given must be 2, 3, or 4. Using
+longer offsets slows down the operation of PCRE because it has to load
+additional bytes when handling them.
+</P>
+<P>
+If you build PCRE with an increased link size, test 2 (and test 5 if you are
+using UTF-8) will fail. Part of the output of these tests is a representation
+of the compiled pattern, and this changes with the link size.
+</P>
+<br><a name="SEC8" href="#TOC1">AVOIDING EXCESSIVE STACK USAGE</a><br>
+<P>
+PCRE implements backtracking while matching by making recursive calls to an
+internal function called <b>match()</b>. In environments where the size of the
+stack is limited, this can severely limit PCRE's operation. (The Unix
+environment does not usually suffer from this problem.) An alternative approach
+that uses memory from the heap to remember data, instead of using recursive
+function calls, has been implemented to work round this problem. If you want to
+build a version of PCRE that works this way, add
+</P>
+<P>
+<pre>
+  --disable-stack-for-recursion
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command. With this configuration, PCRE will use the
+<b>pcre_stack_malloc</b> and <b>pcre_stack_free</b> variables to call memory
+management functions. Separate functions are provided because the usage is very
+predictable: the block sizes requested are always the same, and the blocks are
+always freed in reverse order. A calling program might be able to implement
+optimized functions that perform better than the standard <b>malloc()</b> and
+<b>free()</b> functions. PCRE runs noticeably more slowly when built in this
+way.
+</P>
+<br><a name="SEC9" href="#TOC1">USING EBCDIC CODE</a><br>
+<P>
+PCRE assumes by default that it will run in an environment where the character
+code is ASCII (or UTF-8, which is a superset of ASCII). PCRE can, however, be
+compiled to run in an EBCDIC environment by adding
+</P>
+<P>
+<pre>
+  --enable-ebcdic
+</PRE>
+</P>
+<P>
+to the <b>configure</b> command.
+</P>
+<P>
+Last updated: 09 December 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcrecallout.html b/external-libs/pcre/doc/html/pcrecallout.html
new file mode 100644
index 00000000..f4b7104e
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcrecallout.html
@@ -0,0 +1,117 @@
+<html>
+<head>
+<title>pcrecallout specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">PCRE CALLOUTS</a>
+<li><a name="TOC2" href="#SEC2">RETURN VALUES</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">PCRE CALLOUTS</a><br>
+<P>
+<b>int (*pcre_callout)(pcre_callout_block *);</b>
+</P>
+<P>
+PCRE provides a feature called "callout", which is a means of temporarily
+passing control to the caller of PCRE in the middle of pattern matching. The
+caller of PCRE provides an external function by putting its entry point in the
+global variable <i>pcre_callout</i>. By default, this variable contains NULL,
+which disables all calling out.
+</P>
+<P>
+Within a regular expression, (?C) indicates the points at which the external
+function is to be called. Different callout points can be identified by putting
+a number less than 256 after the letter C. The default value is zero.
+For example, this pattern has two callout points:
+</P>
+<P>
+<pre>
+  (?C1)\dabc(?C2)def
+</PRE>
+</P>
+<P>
+During matching, when PCRE reaches a callout point (and <i>pcre_callout</i> is
+set), the external function is called. Its only argument is a pointer to a
+<b>pcre_callout</b> block. This contains the following variables:
+</P>
+<P>
+<pre>
+  int          <i>version</i>;
+  int          <i>callout_number</i>;
+  int         *<i>offset_vector</i>;
+  const char  *<i>subject</i>;
+  int          <i>subject_length</i>;
+  int          <i>start_match</i>;
+  int          <i>current_position</i>;
+  int          <i>capture_top</i>;
+  int          <i>capture_last</i>;
+  void        *<i>callout_data</i>;
+</PRE>
+</P>
+<P>
+The <i>version</i> field is an integer containing the version number of the
+block format. The current version is zero. The version number may change in
+future if additional fields are added, but the intention is never to remove any
+of the existing fields.
+</P>
+<P>
+The <i>callout_number</i> field contains the number of the callout, as compiled
+into the pattern (that is, the number after ?C).
+</P>
+<P>
+The <i>offset_vector</i> field is a pointer to the vector of offsets that was
+passed by the caller to <b>pcre_exec()</b>. The contents can be inspected in
+order to extract substrings that have been matched so far, in the same way as
+for extracting substrings after a match has completed.
+</P>
+<P>
+The <i>subject</i> and <i>subject_length</i> fields contain copies the values
+that were passed to <b>pcre_exec()</b>.
+</P>
+<P>
+The <i>start_match</i> field contains the offset within the subject at which the
+current match attempt started. If the pattern is not anchored, the callout
+function may be called several times for different starting points.
+</P>
+<P>
+The <i>current_position</i> field contains the offset within the subject of the
+current match pointer.
+</P>
+<P>
+The <i>capture_top</i> field contains one more than the number of the highest
+numbered captured substring so far. If no substrings have been captured,
+the value of <i>capture_top</i> is one.
+</P>
+<P>
+The <i>capture_last</i> field contains the number of the most recently captured
+substring.
+</P>
+<P>
+The <i>callout_data</i> field contains a value that is passed to
+<b>pcre_exec()</b> by the caller specifically so that it can be passed back in
+callouts. It is passed in the <i>pcre_callout</i> field of the <b>pcre_extra</b>
+data structure. If no such data was passed, the value of <i>callout_data</i> in
+a <b>pcre_callout</b> block is NULL. There is a description of the
+<b>pcre_extra</b> structure in the <b>pcreapi</b> documentation.
+</P>
+<br><a name="SEC2" href="#TOC1">RETURN VALUES</a><br>
+<P>
+The callout function returns an integer. If the value is zero, matching
+proceeds as normal. If the value is greater than zero, matching fails at the
+current point, but backtracking to test other possibilities goes ahead, just as
+if a lookahead assertion had failed. If the value is less than zero, the match
+is abandoned, and <b>pcre_exec()</b> returns the value.
+</P>
+<P>
+Negative values should normally be chosen from the set of PCRE_ERROR_xxx
+values. In particular, PCRE_ERROR_NOMATCH forces a standard "no match" failure.
+The error number PCRE_ERROR_CALLOUT is reserved for use by callout functions;
+it will never be used by PCRE itself.
+</P>
+<P>
+Last updated: 21 January 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcrecompat.html b/external-libs/pcre/doc/html/pcrecompat.html
new file mode 100644
index 00000000..1ec22038
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcrecompat.html
@@ -0,0 +1,136 @@
+<html>
+<head>
+<title>pcrecompat specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">DIFFERENCES FROM PERL</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">DIFFERENCES FROM PERL</a><br>
+<P>
+This document describes the differences in the ways that PCRE and Perl handle
+regular expressions. The differences described here are with respect to Perl
+5.8.
+</P>
+<P>
+1. PCRE does not have full UTF-8 support. Details of what it does have are
+given in the
+<a href="pcre.html#utf8support">section on UTF-8 support</a>
+in the main
+<a href="pcre.html"><b>pcre</b></a>
+page.
+</P>
+<P>
+2. PCRE does not allow repeat quantifiers on lookahead assertions. Perl permits
+them, but they do not mean what you might think. For example, (?!a){3} does
+not assert that the next three characters are not "a". It just asserts that the
+next character is not "a" three times.
+</P>
+<P>
+3. Capturing subpatterns that occur inside negative lookahead assertions are
+counted, but their entries in the offsets vector are never set. Perl sets its
+numerical variables from any such patterns that are matched before the
+assertion fails to match something (thereby succeeding), but only if the
+negative lookahead assertion contains just one branch.
+</P>
+<P>
+4. Though binary zero characters are supported in the subject string, they are
+not allowed in a pattern string because it is passed as a normal C string,
+terminated by zero. The escape sequence "\0" can be used in the pattern to
+represent a binary zero.
+</P>
+<P>
+5. The following Perl escape sequences are not supported: \l, \u, \L,
+\U, \P, \p, \N, and \X. In fact these are implemented by Perl's general
+string-handling and are not part of its pattern matching engine. If any of
+these are encountered by PCRE, an error is generated.
+</P>
+<P>
+6. PCRE does support the \Q...\E escape for quoting substrings. Characters in
+between are treated as literals. This is slightly different from Perl in that $
+and @ are also handled as literals inside the quotes. In Perl, they cause
+variable interpolation (but of course PCRE does not have variables). Note the
+following examples:
+</P>
+<P>
+<pre>
+    Pattern            PCRE matches      Perl matches
+</PRE>
+</P>
+<P>
+<pre>
+    \Qabc$xyz\E        abc$xyz           abc followed by the
+                                           contents of $xyz
+    \Qabc\$xyz\E       abc\$xyz          abc\$xyz
+    \Qabc\E\$\Qxyz\E   abc$xyz           abc$xyz
+</PRE>
+</P>
+<P>
+The \Q...\E sequence is recognized both inside and outside character classes.
+</P>
+<P>
+7. Fairly obviously, PCRE does not support the (?{code}) and (?p{code})
+constructions. However, there is some experimental support for recursive
+patterns using the non-Perl items (?R), (?number) and (?P&#62;name). Also, the PCRE
+"callout" feature allows an external function to be called during pattern
+matching.
+</P>
+<P>
+8. There are some differences that are concerned with the settings of captured
+strings when part of a pattern is repeated. For example, matching "aba" against
+the pattern /^(a(b)?)+$/ in Perl leaves $2 unset, but in PCRE it is set to "b".
+</P>
+<P>
+9. PCRE provides some extensions to the Perl regular expression facilities:
+</P>
+<P>
+(a) Although lookbehind assertions must match fixed length strings, each
+alternative branch of a lookbehind assertion can match a different length of
+string. Perl requires them all to have the same length.
+</P>
+<P>
+(b) If PCRE_DOLLAR_ENDONLY is set and PCRE_MULTILINE is not set, the $
+meta-character matches only at the very end of the string.
+</P>
+<P>
+&copy; If PCRE_EXTRA is set, a backslash followed by a letter with no special
+meaning is faulted.
+</P>
+<P>
+(d) If PCRE_UNGREEDY is set, the greediness of the repetition quantifiers is
+inverted, that is, by default they are not greedy, but if followed by a
+question mark they are.
+</P>
+<P>
+(e) PCRE_ANCHORED can be used to force a pattern to be tried only at the first
+matching position in the subject string.
+</P>
+<P>
+(f) The PCRE_NOTBOL, PCRE_NOTEOL, PCRE_NOTEMPTY, and PCRE_NO_AUTO_CAPTURE
+options for <b>pcre_exec()</b> have no Perl equivalents.
+</P>
+<P>
+(g) The (?R), (?number), and (?P&#62;name) constructs allows for recursive pattern
+matching (Perl can do this using the (?p{code}) construct, which PCRE cannot
+support.)
+</P>
+<P>
+(h) PCRE supports named capturing substrings, using the Python syntax.
+</P>
+<P>
+(i) PCRE supports the possessive quantifier "++" syntax, taken from Sun's Java
+package.
+</P>
+<P>
+(j) The (R) condition, for testing recursion, is a PCRE extension.
+</P>
+<P>
+(k) The callout facility is PCRE-specific.
+</P>
+<P>
+Last updated: 09 December 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcregrep.html b/external-libs/pcre/doc/html/pcregrep.html
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,153 @@
+<html>
+<head>
+<title>pcregrep specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">SYNOPSIS</a>
+<li><a name="TOC2" href="#SEC2">DESCRIPTION</a>
+<li><a name="TOC3" href="#SEC3">OPTIONS</a>
+<li><a name="TOC4" href="#SEC4">LONG OPTIONS</a>
+<li><a name="TOC5" href="#SEC5">DIAGNOSTICS</a>
+<li><a name="TOC6" href="#SEC6">AUTHOR</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">SYNOPSIS</a><br>
+<P>
+<b>pcregrep [-Vcfhilnrsuvx] [long options] [pattern] [file1 file2 ...]</b>
+</P>
+<br><a name="SEC2" href="#TOC1">DESCRIPTION</a><br>
+<P>
+<b>pcregrep</b> searches files for character patterns, in the same way as other
+grep commands do, but it uses the PCRE regular expression library to support
+patterns that are compatible with the regular expressions of Perl 5. See
+<a href="pcrepattern.html"><b>pcrepattern</b></a>
+for a full description of syntax and semantics of the regular expressions that
+PCRE supports.
+</P>
+<P>
+A pattern must be specified on the command line unless the <b>-f</b> option is
+used (see below).
+</P>
+<P>
+If no files are specified, <b>pcregrep</b> reads the standard input. By default,
+each line that matches the pattern is copied to the standard output, and if
+there is more than one file, the file name is printed before each line of
+output. However, there are options that can change how <b>pcregrep</b> behaves.
+</P>
+<P>
+Lines are limited to BUFSIZ characters. BUFSIZ is defined in <b>&#60;stdio.h&#62;</b>.
+The newline character is removed from the end of each line before it is matched
+against the pattern.
+</P>
+<br><a name="SEC3" href="#TOC1">OPTIONS</a><br>
+<P>
+<b>-V</b>
+Write the version number of the PCRE library being used to the standard error
+stream.
+</P>
+<P>
+<b>-c</b>
+Do not print individual lines; instead just print a count of the number of
+lines that would otherwise have been printed. If several files are given, a
+count is printed for each of them.
+</P>
+<P>
+<b>-f</b><i>filename</i>
+Read a number of patterns from the file, one per line, and match all of them
+against each line of input. A line is output if any of the patterns match it.
+When <b>-f</b> is used, no pattern is taken from the command line; all arguments
+are treated as file names. There is a maximum of 100 patterns. Trailing white
+space is removed, and blank lines are ignored. An empty file contains no
+patterns and therefore matches nothing.
+</P>
+<P>
+<b>-h</b>
+Suppress printing of filenames when searching multiple files.
+</P>
+<P>
+<b>-i</b>
+Ignore upper/lower case distinctions during comparisons.
+</P>
+<P>
+<b>-l</b>
+Instead of printing lines from the files, just print the names of the files
+containing lines that would have been printed. Each file name is printed
+once, on a separate line.
+</P>
+<P>
+<b>-n</b>
+Precede each line by its line number in the file.
+</P>
+<P>
+<b>-r</b>
+If any file is a directory, recursively scan the files it contains. Without
+<b>-r</b> a directory is scanned as a normal file.
+</P>
+<P>
+<b>-s</b>
+Work silently, that is, display nothing except error messages.
+The exit status indicates whether any matches were found.
+</P>
+<P>
+<b>-u</b>
+Operate in UTF-8 mode. This option is available only if PCRE has been compiled
+with UTF-8 support. Both the pattern and each subject line are assumed to be
+valid strings of UTF-8 characters.
+</P>
+<P>
+<b>-v</b>
+Invert the sense of the match, so that lines which do <i>not</i> match the
+pattern are now the ones that are found.
+</P>
+<P>
+<b>-x</b>
+Force the pattern to be anchored (it must start matching at the beginning of
+the line) and in addition, require it to match the entire line. This is
+equivalent to having ^ and $ characters at the start and end of each
+alternative branch in the regular expression.
+</P>
+<br><a name="SEC4" href="#TOC1">LONG OPTIONS</a><br>
+<P>
+Long forms of all the options are available, as in GNU grep. They are shown in
+the following table:
+</P>
+<P>
+<pre>
+  -c   --count
+  -h   --no-filename
+  -i   --ignore-case
+  -l   --files-with-matches
+  -n   --line-number
+  -r   --recursive
+  -s   --no-messages
+  -u   --utf-8
+  -V   --version
+  -v   --invert-match
+  -x   --line-regex
+  -x   --line-regexp
+</PRE>
+</P>
+<P>
+In addition, --file=<i>filename</i> is equivalent to -f<i>filename</i>, and
+--help shows the list of options and then exits.
+</P>
+<br><a name="SEC5" href="#TOC1">DIAGNOSTICS</a><br>
+<P>
+Exit status is 0 if any matches were found, 1 if no matches were found, and 2
+for syntax errors or inacessible files (even if matches were found).
+</P>
+<br><a name="SEC6" href="#TOC1">AUTHOR</a><br>
+<P>
+Philip Hazel &#60;ph10@cam.ac.uk&#62;
+<br>
+University Computing Service
+<br>
+Cambridge CB2 3QG, England.
+</P>
+<P>
+Last updated: 03 February 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcrepattern.html b/external-libs/pcre/doc/html/pcrepattern.html
new file mode 100644
index 00000000..65abcc21
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcrepattern.html
@@ -0,0 +1,1607 @@
+<html>
+<head>
+<title>pcrepattern specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">PCRE REGULAR EXPRESSION DETAILS</a>
+<li><a name="TOC2" href="#SEC2">BACKSLASH</a>
+<li><a name="TOC3" href="#SEC3">CIRCUMFLEX AND DOLLAR</a>
+<li><a name="TOC4" href="#SEC4">FULL STOP (PERIOD, DOT)</a>
+<li><a name="TOC5" href="#SEC5">MATCHING A SINGLE BYTE</a>
+<li><a name="TOC6" href="#SEC6">SQUARE BRACKETS</a>
+<li><a name="TOC7" href="#SEC7">POSIX CHARACTER CLASSES</a>
+<li><a name="TOC8" href="#SEC8">VERTICAL BAR</a>
+<li><a name="TOC9" href="#SEC9">INTERNAL OPTION SETTING</a>
+<li><a name="TOC10" href="#SEC10">SUBPATTERNS</a>
+<li><a name="TOC11" href="#SEC11">NAMED SUBPATTERNS</a>
+<li><a name="TOC12" href="#SEC12">REPETITION</a>
+<li><a name="TOC13" href="#SEC13">ATOMIC GROUPING AND POSSESSIVE QUANTIFIERS</a>
+<li><a name="TOC14" href="#SEC14">BACK REFERENCES</a>
+<li><a name="TOC15" href="#SEC15">ASSERTIONS</a>
+<li><a name="TOC16" href="#SEC16">CONDITIONAL SUBPATTERNS</a>
+<li><a name="TOC17" href="#SEC17">COMMENTS</a>
+<li><a name="TOC18" href="#SEC18">RECURSIVE PATTERNS</a>
+<li><a name="TOC19" href="#SEC19">SUBPATTERNS AS SUBROUTINES</a>
+<li><a name="TOC20" href="#SEC20">CALLOUTS</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">PCRE REGULAR EXPRESSION DETAILS</a><br>
+<P>
+The syntax and semantics of the regular expressions supported by PCRE are
+described below. Regular expressions are also described in the Perl
+documentation and in a number of other books, some of which have copious
+examples. Jeffrey Friedl's "Mastering Regular Expressions", published by
+O'Reilly, covers them in great detail. The description here is intended as
+reference documentation.
+</P>
+<P>
+The basic operation of PCRE is on strings of bytes. However, there is also
+support for UTF-8 character strings. To use this support you must build PCRE to
+include UTF-8 support, and then call <b>pcre_compile()</b> with the PCRE_UTF8
+option. How this affects the pattern matching is mentioned in several places
+below. There is also a summary of UTF-8 features in the
+<a href="pcre.html#utf8support">section on UTF-8 support</a>
+in the main
+<a href="pcre.html"><b>pcre</b></a>
+page.
+</P>
+<P>
+A regular expression is a pattern that is matched against a subject string from
+left to right. Most characters stand for themselves in a pattern, and match the
+corresponding characters in the subject. As a trivial example, the pattern
+</P>
+<P>
+<pre>
+  The quick brown fox
+</PRE>
+</P>
+<P>
+matches a portion of a subject string that is identical to itself. The power of
+regular expressions comes from the ability to include alternatives and
+repetitions in the pattern. These are encoded in the pattern by the use of
+<i>meta-characters</i>, which do not stand for themselves but instead are
+interpreted in some special way.
+</P>
+<P>
+There are two different sets of meta-characters: those that are recognized
+anywhere in the pattern except within square brackets, and those that are
+recognized in square brackets. Outside square brackets, the meta-characters are
+as follows:
+</P>
+<P>
+<pre>
+  \      general escape character with several uses
+  ^      assert start of string (or line, in multiline mode)
+  $      assert end of string (or line, in multiline mode)
+  .      match any character except newline (by default)
+  [      start character class definition
+  |      start of alternative branch
+  (      start subpattern
+  )      end subpattern
+  ?      extends the meaning of (
+         also 0 or 1 quantifier
+         also quantifier minimizer
+  *      0 or more quantifier
+  +      1 or more quantifier
+         also "possessive quantifier"
+  {      start min/max quantifier
+</PRE>
+</P>
+<P>
+Part of a pattern that is in square brackets is called a "character class". In
+a character class the only meta-characters are:
+</P>
+<P>
+<pre>
+  \      general escape character
+  ^      negate the class, but only if the first character
+  -      indicates character range
+  [      POSIX character class (only if followed by POSIX
+           syntax)
+  ]      terminates the character class
+</PRE>
+</P>
+<P>
+The following sections describe the use of each of the meta-characters.
+</P>
+<br><a name="SEC2" href="#TOC1">BACKSLASH</a><br>
+<P>
+The backslash character has several uses. Firstly, if it is followed by a
+non-alphameric character, it takes away any special meaning that character may
+have. This use of backslash as an escape character applies both inside and
+outside character classes.
+</P>
+<P>
+For example, if you want to match a * character, you write \* in the pattern.
+This escaping action applies whether or not the following character would
+otherwise be interpreted as a meta-character, so it is always safe to precede a
+non-alphameric with backslash to specify that it stands for itself. In
+particular, if you want to match a backslash, you write \\.
+</P>
+<P>
+If a pattern is compiled with the PCRE_EXTENDED option, whitespace in the
+pattern (other than in a character class) and characters between a # outside
+a character class and the next newline character are ignored. An escaping
+backslash can be used to include a whitespace or # character as part of the
+pattern.
+</P>
+<P>
+If you want to remove the special meaning from a sequence of characters, you
+can do so by putting them between \Q and \E. This is different from Perl in
+that $ and @ are handled as literals in \Q...\E sequences in PCRE, whereas in
+Perl, $ and @ cause variable interpolation. Note the following examples:
+</P>
+<P>
+<pre>
+  Pattern            PCRE matches   Perl matches
+</PRE>
+</P>
+<P>
+<pre>
+  \Qabc$xyz\E        abc$xyz        abc followed by the
+                                      contents of $xyz
+  \Qabc\$xyz\E       abc\$xyz       abc\$xyz
+  \Qabc\E\$\Qxyz\E   abc$xyz        abc$xyz
+</PRE>
+</P>
+<P>
+The \Q...\E sequence is recognized both inside and outside character classes.
+</P>
+<P>
+A second use of backslash provides a way of encoding non-printing characters
+in patterns in a visible manner. There is no restriction on the appearance of
+non-printing characters, apart from the binary zero that terminates a pattern,
+but when a pattern is being prepared by text editing, it is usually easier to
+use one of the following escape sequences than the binary character it
+represents:
+</P>
+<P>
+<pre>
+  \a        alarm, that is, the BEL character (hex 07)
+  \cx       "control-x", where x is any character
+  \e        escape (hex 1B)
+  \f        formfeed (hex 0C)
+  \n        newline (hex 0A)
+  \r        carriage return (hex 0D)
+  \t        tab (hex 09)
+  \ddd      character with octal code ddd, or backreference
+  \xhh      character with hex code hh
+  \x{hhh..} character with hex code hhh... (UTF-8 mode only)
+</PRE>
+</P>
+<P>
+The precise effect of \cx is as follows: if x is a lower case letter, it
+is converted to upper case. Then bit 6 of the character (hex 40) is inverted.
+Thus \cz becomes hex 1A, but \c{ becomes hex 3B, while \c; becomes hex
+7B.
+</P>
+<P>
+After \x, from zero to two hexadecimal digits are read (letters can be in
+upper or lower case). In UTF-8 mode, any number of hexadecimal digits may
+appear between \x{ and }, but the value of the character code must be less
+than 2**31 (that is, the maximum hexadecimal value is 7FFFFFFF). If characters
+other than hexadecimal digits appear between \x{ and }, or if there is no
+terminating }, this form of escape is not recognized. Instead, the initial
+\x will be interpreted as a basic hexadecimal escape, with no following
+digits, giving a byte whose value is zero.
+</P>
+<P>
+Characters whose value is less than 256 can be defined by either of the two
+syntaxes for \x when PCRE is in UTF-8 mode. There is no difference in the
+way they are handled. For example, \xdc is exactly the same as \x{dc}.
+</P>
+<P>
+After \0 up to two further octal digits are read. In both cases, if there
+are fewer than two digits, just those that are present are used. Thus the
+sequence \0\x\07 specifies two binary zeros followed by a BEL character
+(code value 7). Make sure you supply two digits after the initial zero if the
+character that follows is itself an octal digit.
+</P>
+<P>
+The handling of a backslash followed by a digit other than 0 is complicated.
+Outside a character class, PCRE reads it and any following digits as a decimal
+number. If the number is less than 10, or if there have been at least that many
+previous capturing left parentheses in the expression, the entire sequence is
+taken as a <i>back reference</i>. A description of how this works is given
+later, following the discussion of parenthesized subpatterns.
+</P>
+<P>
+Inside a character class, or if the decimal number is greater than 9 and there
+have not been that many capturing subpatterns, PCRE re-reads up to three octal
+digits following the backslash, and generates a single byte from the least
+significant 8 bits of the value. Any subsequent digits stand for themselves.
+For example:
+</P>
+<P>
+<pre>
+  \040   is another way of writing a space
+  \40    is the same, provided there are fewer than 40
+            previous capturing subpatterns
+  \7     is always a back reference
+  \11    might be a back reference, or another way of
+            writing a tab
+  \011   is always a tab
+  \0113  is a tab followed by the character "3"
+  \113   might be a back reference, otherwise the
+            character with octal code 113
+  \377   might be a back reference, otherwise
+            the byte consisting entirely of 1 bits
+  \81    is either a back reference, or a binary zero
+            followed by the two characters "8" and "1"
+</PRE>
+</P>
+<P>
+Note that octal values of 100 or greater must not be introduced by a leading
+zero, because no more than three octal digits are ever read.
+</P>
+<P>
+All the sequences that define a single byte value or a single UTF-8 character
+(in UTF-8 mode) can be used both inside and outside character classes. In
+addition, inside a character class, the sequence \b is interpreted as the
+backspace character (hex 08). Outside a character class it has a different
+meaning (see below).
+</P>
+<P>
+The third use of backslash is for specifying generic character types:
+</P>
+<P>
+<pre>
+  \d     any decimal digit
+  \D     any character that is not a decimal digit
+  \s     any whitespace character
+  \S     any character that is not a whitespace character
+  \w     any "word" character
+  \W     any "non-word" character
+</PRE>
+</P>
+<P>
+Each pair of escape sequences partitions the complete set of characters into
+two disjoint sets. Any given character matches one, and only one, of each pair.
+</P>
+<P>
+In UTF-8 mode, characters with values greater than 255 never match \d, \s, or
+\w, and always match \D, \S, and \W.
+</P>
+<P>
+For compatibility with Perl, \s does not match the VT character (code 11).
+This makes it different from the the POSIX "space" class. The \s characters
+are HT (9), LF (10), FF (12), CR (13), and space (32).
+</P>
+<P>
+A "word" character is any letter or digit or the underscore character, that is,
+any character which can be part of a Perl "word". The definition of letters and
+digits is controlled by PCRE's character tables, and may vary if locale-
+specific matching is taking place (see
+<a href="pcreapi.html#localesupport">"Locale support"</a>
+in the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+page). For example, in the "fr" (French) locale, some character codes greater
+than 128 are used for accented letters, and these are matched by \w.
+</P>
+<P>
+These character type sequences can appear both inside and outside character
+classes. They each match one character of the appropriate type. If the current
+matching point is at the end of the subject string, all of them fail, since
+there is no character to match.
+</P>
+<P>
+The fourth use of backslash is for certain simple assertions. An assertion
+specifies a condition that has to be met at a particular point in a match,
+without consuming any characters from the subject string. The use of
+subpatterns for more complicated assertions is described below. The backslashed
+assertions are
+</P>
+<P>
+<pre>
+  \b     matches at a word boundary
+  \B     matches when not at a word boundary
+  \A     matches at start of subject
+  \Z     matches at end of subject or before newline at end
+  \z     matches at end of subject
+  \G     matches at first matching position in subject
+</PRE>
+</P>
+<P>
+These assertions may not appear in character classes (but note that \b has a
+different meaning, namely the backspace character, inside a character class).
+</P>
+<P>
+A word boundary is a position in the subject string where the current character
+and the previous character do not both match \w or \W (i.e. one matches
+\w and the other matches \W), or the start or end of the string if the
+first or last character matches \w, respectively.
+</P>
+<P>
+The \A, \Z, and \z assertions differ from the traditional circumflex and
+dollar (described below) in that they only ever match at the very start and end
+of the subject string, whatever options are set. Thus, they are independent of
+multiline mode.
+</P>
+<P>
+They are not affected by the PCRE_NOTBOL or PCRE_NOTEOL options. If the
+<i>startoffset</i> argument of <b>pcre_exec()</b> is non-zero, indicating that
+matching is to start at a point other than the beginning of the subject, \A
+can never match. The difference between \Z and \z is that \Z matches before
+a newline that is the last character of the string as well as at the end of the
+string, whereas \z matches only at the end.
+</P>
+<P>
+The \G assertion is true only when the current matching position is at the
+start point of the match, as specified by the <i>startoffset</i> argument of
+<b>pcre_exec()</b>. It differs from \A when the value of <i>startoffset</i> is
+non-zero. By calling <b>pcre_exec()</b> multiple times with appropriate
+arguments, you can mimic Perl's /g option, and it is in this kind of
+implementation where \G can be useful.
+</P>
+<P>
+Note, however, that PCRE's interpretation of \G, as the start of the current
+match, is subtly different from Perl's, which defines it as the end of the
+previous match. In Perl, these can be different when the previously matched
+string was empty. Because PCRE does just one match at a time, it cannot
+reproduce this behaviour.
+</P>
+<P>
+If all the alternatives of a pattern begin with \G, the expression is anchored
+to the starting match position, and the "anchored" flag is set in the compiled
+regular expression.
+</P>
+<br><a name="SEC3" href="#TOC1">CIRCUMFLEX AND DOLLAR</a><br>
+<P>
+Outside a character class, in the default matching mode, the circumflex
+character is an assertion which is true only if the current matching point is
+at the start of the subject string. If the <i>startoffset</i> argument of
+<b>pcre_exec()</b> is non-zero, circumflex can never match if the PCRE_MULTILINE
+option is unset. Inside a character class, circumflex has an entirely different
+meaning (see below).
+</P>
+<P>
+Circumflex need not be the first character of the pattern if a number of
+alternatives are involved, but it should be the first thing in each alternative
+in which it appears if the pattern is ever to match that branch. If all
+possible alternatives start with a circumflex, that is, if the pattern is
+constrained to match only at the start of the subject, it is said to be an
+"anchored" pattern. (There are also other constructs that can cause a pattern
+to be anchored.)
+</P>
+<P>
+A dollar character is an assertion which is true only if the current matching
+point is at the end of the subject string, or immediately before a newline
+character that is the last character in the string (by default). Dollar need
+not be the last character of the pattern if a number of alternatives are
+involved, but it should be the last item in any branch in which it appears.
+Dollar has no special meaning in a character class.
+</P>
+<P>
+The meaning of dollar can be changed so that it matches only at the very end of
+the string, by setting the PCRE_DOLLAR_ENDONLY option at compile time. This
+does not affect the \Z assertion.
+</P>
+<P>
+The meanings of the circumflex and dollar characters are changed if the
+PCRE_MULTILINE option is set. When this is the case, they match immediately
+after and immediately before an internal newline character, respectively, in
+addition to matching at the start and end of the subject string. For example,
+the pattern /^abc$/ matches the subject string "def\nabc" in multiline mode,
+but not otherwise. Consequently, patterns that are anchored in single line mode
+because all branches start with ^ are not anchored in multiline mode, and a
+match for circumflex is possible when the <i>startoffset</i> argument of
+<b>pcre_exec()</b> is non-zero. The PCRE_DOLLAR_ENDONLY option is ignored if
+PCRE_MULTILINE is set.
+</P>
+<P>
+Note that the sequences \A, \Z, and \z can be used to match the start and
+end of the subject in both modes, and if all branches of a pattern start with
+\A it is always anchored, whether PCRE_MULTILINE is set or not.
+</P>
+<br><a name="SEC4" href="#TOC1">FULL STOP (PERIOD, DOT)</a><br>
+<P>
+Outside a character class, a dot in the pattern matches any one character in
+the subject, including a non-printing character, but not (by default) newline.
+In UTF-8 mode, a dot matches any UTF-8 character, which might be more than one
+byte long, except (by default) for newline. If the PCRE_DOTALL option is set,
+dots match newlines as well. The handling of dot is entirely independent of the
+handling of circumflex and dollar, the only relationship being that they both
+involve newline characters. Dot has no special meaning in a character class.
+</P>
+<br><a name="SEC5" href="#TOC1">MATCHING A SINGLE BYTE</a><br>
+<P>
+Outside a character class, the escape sequence \C matches any one byte, both
+in and out of UTF-8 mode. Unlike a dot, it always matches a newline. The
+feature is provided in Perl in order to match individual bytes in UTF-8 mode.
+Because it breaks up UTF-8 characters into individual bytes, what remains in
+the string may be a malformed UTF-8 string. For this reason it is best avoided.
+</P>
+<P>
+PCRE does not allow \C to appear in lookbehind assertions (see below), because
+in UTF-8 mode it makes it impossible to calculate the length of the lookbehind.
+</P>
+<br><a name="SEC6" href="#TOC1">SQUARE BRACKETS</a><br>
+<P>
+An opening square bracket introduces a character class, terminated by a closing
+square bracket. A closing square bracket on its own is not special. If a
+closing square bracket is required as a member of the class, it should be the
+first data character in the class (after an initial circumflex, if present) or
+escaped with a backslash.
+</P>
+<P>
+A character class matches a single character in the subject. In UTF-8 mode, the
+character may occupy more than one byte. A matched character must be in the set
+of characters defined by the class, unless the first character in the class
+definition is a circumflex, in which case the subject character must not be in
+the set defined by the class. If a circumflex is actually required as a member
+of the class, ensure it is not the first character, or escape it with a
+backslash.
+</P>
+<P>
+For example, the character class [aeiou] matches any lower case vowel, while
+[^aeiou] matches any character that is not a lower case vowel. Note that a
+circumflex is just a convenient notation for specifying the characters which
+are in the class by enumerating those that are not. It is not an assertion: it
+still consumes a character from the subject string, and fails if the current
+pointer is at the end of the string.
+</P>
+<P>
+In UTF-8 mode, characters with values greater than 255 can be included in a
+class as a literal string of bytes, or by using the \x{ escaping mechanism.
+</P>
+<P>
+When caseless matching is set, any letters in a class represent both their
+upper case and lower case versions, so for example, a caseless [aeiou] matches
+"A" as well as "a", and a caseless [^aeiou] does not match "A", whereas a
+caseful version would. PCRE does not support the concept of case for characters
+with values greater than 255.
+</P>
+<P>
+The newline character is never treated in any special way in character classes,
+whatever the setting of the PCRE_DOTALL or PCRE_MULTILINE options is. A class
+such as [^a] will always match a newline.
+</P>
+<P>
+The minus (hyphen) character can be used to specify a range of characters in a
+character class. For example, [d-m] matches any letter between d and m,
+inclusive. If a minus character is required in a class, it must be escaped with
+a backslash or appear in a position where it cannot be interpreted as
+indicating a range, typically as the first or last character in the class.
+</P>
+<P>
+It is not possible to have the literal character "]" as the end character of a
+range. A pattern such as [W-]46] is interpreted as a class of two characters
+("W" and "-") followed by a literal string "46]", so it would match "W46]" or
+"-46]". However, if the "]" is escaped with a backslash it is interpreted as
+the end of range, so [W-\]46] is interpreted as a single class containing a
+range followed by two separate characters. The octal or hexadecimal
+representation of "]" can also be used to end a range.
+</P>
+<P>
+Ranges operate in the collating sequence of character values. They can also be
+used for characters specified numerically, for example [\000-\037]. In UTF-8
+mode, ranges can include characters whose values are greater than 255, for
+example [\x{100}-\x{2ff}].
+</P>
+<P>
+If a range that includes letters is used when caseless matching is set, it
+matches the letters in either case. For example, [W-c] is equivalent to
+[][\^_`wxyzabc], matched caselessly, and if character tables for the "fr"
+locale are in use, [\xc8-\xcb] matches accented E characters in both cases.
+</P>
+<P>
+The character types \d, \D, \s, \S, \w, and \W may also appear in a
+character class, and add the characters that they match to the class. For
+example, [\dABCDEF] matches any hexadecimal digit. A circumflex can
+conveniently be used with the upper case character types to specify a more
+restricted set of characters than the matching lower case type. For example,
+the class [^\W_] matches any letter or digit, but not underscore.
+</P>
+<P>
+All non-alphameric characters other than \, -, ^ (at the start) and the
+terminating ] are non-special in character classes, but it does no harm if they
+are escaped.
+</P>
+<br><a name="SEC7" href="#TOC1">POSIX CHARACTER CLASSES</a><br>
+<P>
+Perl supports the POSIX notation for character classes, which uses names
+enclosed by [: and :] within the enclosing square brackets. PCRE also supports
+this notation. For example,
+</P>
+<P>
+<pre>
+  [01[:alpha:]%]
+</PRE>
+</P>
+<P>
+matches "0", "1", any alphabetic character, or "%". The supported class names
+are
+</P>
+<P>
+<pre>
+  alnum    letters and digits
+  alpha    letters
+  ascii    character codes 0 - 127
+  blank    space or tab only
+  cntrl    control characters
+  digit    decimal digits (same as \d)
+  graph    printing characters, excluding space
+  lower    lower case letters
+  print    printing characters, including space
+  punct    printing characters, excluding letters and digits
+  space    white space (not quite the same as \s)
+  upper    upper case letters
+  word     "word" characters (same as \w)
+  xdigit   hexadecimal digits
+</PRE>
+</P>
+<P>
+The "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13), and
+space (32). Notice that this list includes the VT character (code 11). This
+makes "space" different to \s, which does not include VT (for Perl
+compatibility).
+</P>
+<P>
+The name "word" is a Perl extension, and "blank" is a GNU extension from Perl
+5.8. Another Perl extension is negation, which is indicated by a ^ character
+after the colon. For example,
+</P>
+<P>
+<pre>
+  [12[:^digit:]]
+</PRE>
+</P>
+<P>
+matches "1", "2", or any non-digit. PCRE (and Perl) also recognize the POSIX
+syntax [.ch.] and [=ch=] where "ch" is a "collating element", but these are not
+supported, and an error is given if they are encountered.
+</P>
+<P>
+In UTF-8 mode, characters with values greater than 255 do not match any of
+the POSIX character classes.
+</P>
+<br><a name="SEC8" href="#TOC1">VERTICAL BAR</a><br>
+<P>
+Vertical bar characters are used to separate alternative patterns. For example,
+the pattern
+</P>
+<P>
+<pre>
+  gilbert|sullivan
+</PRE>
+</P>
+<P>
+matches either "gilbert" or "sullivan". Any number of alternatives may appear,
+and an empty alternative is permitted (matching the empty string).
+The matching process tries each alternative in turn, from left to right,
+and the first one that succeeds is used. If the alternatives are within a
+subpattern (defined below), "succeeds" means matching the rest of the main
+pattern as well as the alternative in the subpattern.
+</P>
+<br><a name="SEC9" href="#TOC1">INTERNAL OPTION SETTING</a><br>
+<P>
+The settings of the PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, and
+PCRE_EXTENDED options can be changed from within the pattern by a sequence of
+Perl option letters enclosed between "(?" and ")". The option letters are
+</P>
+<P>
+<pre>
+  i  for PCRE_CASELESS
+  m  for PCRE_MULTILINE
+  s  for PCRE_DOTALL
+  x  for PCRE_EXTENDED
+</PRE>
+</P>
+<P>
+For example, (?im) sets caseless, multiline matching. It is also possible to
+unset these options by preceding the letter with a hyphen, and a combined
+setting and unsetting such as (?im-sx), which sets PCRE_CASELESS and
+PCRE_MULTILINE while unsetting PCRE_DOTALL and PCRE_EXTENDED, is also
+permitted. If a letter appears both before and after the hyphen, the option is
+unset.
+</P>
+<P>
+When an option change occurs at top level (that is, not inside subpattern
+parentheses), the change applies to the remainder of the pattern that follows.
+If the change is placed right at the start of a pattern, PCRE extracts it into
+the global options (and it will therefore show up in data extracted by the
+<b>pcre_fullinfo()</b> function).
+</P>
+<P>
+An option change within a subpattern affects only that part of the current
+pattern that follows it, so
+</P>
+<P>
+<pre>
+  (a(?i)b)c
+</PRE>
+</P>
+<P>
+matches abc and aBc and no other strings (assuming PCRE_CASELESS is not used).
+By this means, options can be made to have different settings in different
+parts of the pattern. Any changes made in one alternative do carry on
+into subsequent branches within the same subpattern. For example,
+</P>
+<P>
+<pre>
+  (a(?i)b|c)
+</PRE>
+</P>
+<P>
+matches "ab", "aB", "c", and "C", even though when matching "C" the first
+branch is abandoned before the option setting. This is because the effects of
+option settings happen at compile time. There would be some very weird
+behaviour otherwise.
+</P>
+<P>
+The PCRE-specific options PCRE_UNGREEDY and PCRE_EXTRA can be changed in the
+same way as the Perl-compatible options by using the characters U and X
+respectively. The (?X) flag setting is special in that it must always occur
+earlier in the pattern than any of the additional features it turns on, even
+when it is at top level. It is best put at the start.
+</P>
+<br><a name="SEC10" href="#TOC1">SUBPATTERNS</a><br>
+<P>
+Subpatterns are delimited by parentheses (round brackets), which can be nested.
+Marking part of a pattern as a subpattern does two things:
+</P>
+<P>
+1. It localizes a set of alternatives. For example, the pattern
+</P>
+<P>
+<pre>
+  cat(aract|erpillar|)
+</PRE>
+</P>
+<P>
+matches one of the words "cat", "cataract", or "caterpillar". Without the
+parentheses, it would match "cataract", "erpillar" or the empty string.
+</P>
+<P>
+2. It sets up the subpattern as a capturing subpattern (as defined above).
+When the whole pattern matches, that portion of the subject string that matched
+the subpattern is passed back to the caller via the <i>ovector</i> argument of
+<b>pcre_exec()</b>. Opening parentheses are counted from left to right (starting
+from 1) to obtain the numbers of the capturing subpatterns.
+</P>
+<P>
+For example, if the string "the red king" is matched against the pattern
+</P>
+<P>
+<pre>
+  the ((red|white) (king|queen))
+</PRE>
+</P>
+<P>
+the captured substrings are "red king", "red", and "king", and are numbered 1,
+2, and 3, respectively.
+</P>
+<P>
+The fact that plain parentheses fulfil two functions is not always helpful.
+There are often times when a grouping subpattern is required without a
+capturing requirement. If an opening parenthesis is followed by a question mark
+and a colon, the subpattern does not do any capturing, and is not counted when
+computing the number of any subsequent capturing subpatterns. For example, if
+the string "the white queen" is matched against the pattern
+</P>
+<P>
+<pre>
+  the ((?:red|white) (king|queen))
+</PRE>
+</P>
+<P>
+the captured substrings are "white queen" and "queen", and are numbered 1 and
+2. The maximum number of capturing subpatterns is 65535, and the maximum depth
+of nesting of all subpatterns, both capturing and non-capturing, is 200.
+</P>
+<P>
+As a convenient shorthand, if any option settings are required at the start of
+a non-capturing subpattern, the option letters may appear between the "?" and
+the ":". Thus the two patterns
+</P>
+<P>
+<pre>
+  (?i:saturday|sunday)
+  (?:(?i)saturday|sunday)
+</PRE>
+</P>
+<P>
+match exactly the same set of strings. Because alternative branches are tried
+from left to right, and options are not reset until the end of the subpattern
+is reached, an option setting in one branch does affect subsequent branches, so
+the above patterns match "SUNDAY" as well as "Saturday".
+</P>
+<br><a name="SEC11" href="#TOC1">NAMED SUBPATTERNS</a><br>
+<P>
+Identifying capturing parentheses by number is simple, but it can be very hard
+to keep track of the numbers in complicated regular expressions. Furthermore,
+if an expression is modified, the numbers may change. To help with the
+difficulty, PCRE supports the naming of subpatterns, something that Perl does
+not provide. The Python syntax (?P&#60;name&#62;...) is used. Names consist of
+alphanumeric characters and underscores, and must be unique within a pattern.
+</P>
+<P>
+Named capturing parentheses are still allocated numbers as well as names. The
+PCRE API provides function calls for extracting the name-to-number translation
+table from a compiled pattern. For further details see the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+documentation.
+</P>
+<br><a name="SEC12" href="#TOC1">REPETITION</a><br>
+<P>
+Repetition is specified by quantifiers, which can follow any of the following
+items:
+</P>
+<P>
+<pre>
+  a literal data character
+  the . metacharacter
+  the \C escape sequence
+  escapes such as \d that match single characters
+  a character class
+  a back reference (see next section)
+  a parenthesized subpattern (unless it is an assertion)
+</PRE>
+</P>
+<P>
+The general repetition quantifier specifies a minimum and maximum number of
+permitted matches, by giving the two numbers in curly brackets (braces),
+separated by a comma. The numbers must be less than 65536, and the first must
+be less than or equal to the second. For example:
+</P>
+<P>
+<pre>
+  z{2,4}
+</PRE>
+</P>
+<P>
+matches "zz", "zzz", or "zzzz". A closing brace on its own is not a special
+character. If the second number is omitted, but the comma is present, there is
+no upper limit; if the second number and the comma are both omitted, the
+quantifier specifies an exact number of required matches. Thus
+</P>
+<P>
+<pre>
+  [aeiou]{3,}
+</PRE>
+</P>
+<P>
+matches at least 3 successive vowels, but may match many more, while
+</P>
+<P>
+<pre>
+  \d{8}
+</PRE>
+</P>
+<P>
+matches exactly 8 digits. An opening curly bracket that appears in a position
+where a quantifier is not allowed, or one that does not match the syntax of a
+quantifier, is taken as a literal character. For example, {,6} is not a
+quantifier, but a literal string of four characters.
+</P>
+<P>
+In UTF-8 mode, quantifiers apply to UTF-8 characters rather than to individual
+bytes. Thus, for example, \x{100}{2} matches two UTF-8 characters, each of
+which is represented by a two-byte sequence.
+</P>
+<P>
+The quantifier {0} is permitted, causing the expression to behave as if the
+previous item and the quantifier were not present.
+</P>
+<P>
+For convenience (and historical compatibility) the three most common
+quantifiers have single-character abbreviations:
+</P>
+<P>
+<pre>
+  *    is equivalent to {0,}
+  +    is equivalent to {1,}
+  ?    is equivalent to {0,1}
+</PRE>
+</P>
+<P>
+It is possible to construct infinite loops by following a subpattern that can
+match no characters with a quantifier that has no upper limit, for example:
+</P>
+<P>
+<pre>
+  (a?)*
+</PRE>
+</P>
+<P>
+Earlier versions of Perl and PCRE used to give an error at compile time for
+such patterns. However, because there are cases where this can be useful, such
+patterns are now accepted, but if any repetition of the subpattern does in fact
+match no characters, the loop is forcibly broken.
+</P>
+<P>
+By default, the quantifiers are "greedy", that is, they match as much as
+possible (up to the maximum number of permitted times), without causing the
+rest of the pattern to fail. The classic example of where this gives problems
+is in trying to match comments in C programs. These appear between the
+sequences /* and */ and within the sequence, individual * and / characters may
+appear. An attempt to match C comments by applying the pattern
+</P>
+<P>
+<pre>
+  /\*.*\*/
+</PRE>
+</P>
+<P>
+to the string
+</P>
+<P>
+<pre>
+  /* first command */  not comment  /* second comment */
+</PRE>
+</P>
+<P>
+fails, because it matches the entire string owing to the greediness of the .*
+item.
+</P>
+<P>
+However, if a quantifier is followed by a question mark, it ceases to be
+greedy, and instead matches the minimum number of times possible, so the
+pattern
+</P>
+<P>
+<pre>
+  /\*.*?\*/
+</PRE>
+</P>
+<P>
+does the right thing with the C comments. The meaning of the various
+quantifiers is not otherwise changed, just the preferred number of matches.
+Do not confuse this use of question mark with its use as a quantifier in its
+own right. Because it has two uses, it can sometimes appear doubled, as in
+</P>
+<P>
+<pre>
+  \d??\d
+</PRE>
+</P>
+<P>
+which matches one digit by preference, but can match two if that is the only
+way the rest of the pattern matches.
+</P>
+<P>
+If the PCRE_UNGREEDY option is set (an option which is not available in Perl),
+the quantifiers are not greedy by default, but individual ones can be made
+greedy by following them with a question mark. In other words, it inverts the
+default behaviour.
+</P>
+<P>
+When a parenthesized subpattern is quantified with a minimum repeat count that
+is greater than 1 or with a limited maximum, more store is required for the
+compiled pattern, in proportion to the size of the minimum or maximum.
+</P>
+<P>
+If a pattern starts with .* or .{0,} and the PCRE_DOTALL option (equivalent
+to Perl's /s) is set, thus allowing the . to match newlines, the pattern is
+implicitly anchored, because whatever follows will be tried against every
+character position in the subject string, so there is no point in retrying the
+overall match at any position after the first. PCRE normally treats such a
+pattern as though it were preceded by \A.
+</P>
+<P>
+In cases where it is known that the subject string contains no newlines, it is
+worth setting PCRE_DOTALL in order to obtain this optimization, or
+alternatively using ^ to indicate anchoring explicitly.
+</P>
+<P>
+However, there is one situation where the optimization cannot be used. When .*
+is inside capturing parentheses that are the subject of a backreference
+elsewhere in the pattern, a match at the start may fail, and a later one
+succeed. Consider, for example:
+</P>
+<P>
+<pre>
+  (.*)abc\1
+</PRE>
+</P>
+<P>
+If the subject is "xyz123abc123" the match point is the fourth character. For
+this reason, such a pattern is not implicitly anchored.
+</P>
+<P>
+When a capturing subpattern is repeated, the value captured is the substring
+that matched the final iteration. For example, after
+</P>
+<P>
+<pre>
+  (tweedle[dume]{3}\s*)+
+</PRE>
+</P>
+<P>
+has matched "tweedledum tweedledee" the value of the captured substring is
+"tweedledee". However, if there are nested capturing subpatterns, the
+corresponding captured values may have been set in previous iterations. For
+example, after
+</P>
+<P>
+<pre>
+  /(a|(b))+/
+</PRE>
+</P>
+<P>
+matches "aba" the value of the second captured substring is "b".
+</P>
+<br><a name="SEC13" href="#TOC1">ATOMIC GROUPING AND POSSESSIVE QUANTIFIERS</a><br>
+<P>
+With both maximizing and minimizing repetition, failure of what follows
+normally causes the repeated item to be re-evaluated to see if a different
+number of repeats allows the rest of the pattern to match. Sometimes it is
+useful to prevent this, either to change the nature of the match, or to cause
+it fail earlier than it otherwise might, when the author of the pattern knows
+there is no point in carrying on.
+</P>
+<P>
+Consider, for example, the pattern \d+foo when applied to the subject line
+</P>
+<P>
+<pre>
+  123456bar
+</PRE>
+</P>
+<P>
+After matching all 6 digits and then failing to match "foo", the normal
+action of the matcher is to try again with only 5 digits matching the \d+
+item, and then with 4, and so on, before ultimately failing. "Atomic grouping"
+(a term taken from Jeffrey Friedl's book) provides the means for specifying
+that once a subpattern has matched, it is not to be re-evaluated in this way.
+</P>
+<P>
+If we use atomic grouping for the previous example, the matcher would give up
+immediately on failing to match "foo" the first time. The notation is a kind of
+special parenthesis, starting with (?&#62; as in this example:
+</P>
+<P>
+<pre>
+  (?&#62;\d+)foo
+</PRE>
+</P>
+<P>
+This kind of parenthesis "locks up" the  part of the pattern it contains once
+it has matched, and a failure further into the pattern is prevented from
+backtracking into it. Backtracking past it to previous items, however, works as
+normal.
+</P>
+<P>
+An alternative description is that a subpattern of this type matches the string
+of characters that an identical standalone pattern would match, if anchored at
+the current point in the subject string.
+</P>
+<P>
+Atomic grouping subpatterns are not capturing subpatterns. Simple cases such as
+the above example can be thought of as a maximizing repeat that must swallow
+everything it can. So, while both \d+ and \d+? are prepared to adjust the
+number of digits they match in order to make the rest of the pattern match,
+(?&#62;\d+) can only match an entire sequence of digits.
+</P>
+<P>
+Atomic groups in general can of course contain arbitrarily complicated
+subpatterns, and can be nested. However, when the subpattern for an atomic
+group is just a single repeated item, as in the example above, a simpler
+notation, called a "possessive quantifier" can be used. This consists of an
+additional + character following a quantifier. Using this notation, the
+previous example can be rewritten as
+</P>
+<P>
+<pre>
+  \d++bar
+</PRE>
+</P>
+<P>
+Possessive quantifiers are always greedy; the setting of the PCRE_UNGREEDY
+option is ignored. They are a convenient notation for the simpler forms of
+atomic group. However, there is no difference in the meaning or processing of a
+possessive quantifier and the equivalent atomic group.
+</P>
+<P>
+The possessive quantifier syntax is an extension to the Perl syntax. It
+originates in Sun's Java package.
+</P>
+<P>
+When a pattern contains an unlimited repeat inside a subpattern that can itself
+be repeated an unlimited number of times, the use of an atomic group is the
+only way to avoid some failing matches taking a very long time indeed. The
+pattern
+</P>
+<P>
+<pre>
+  (\D+|&#60;\d+&#62;)*[!?]
+</PRE>
+</P>
+<P>
+matches an unlimited number of substrings that either consist of non-digits, or
+digits enclosed in &#60;&#62;, followed by either ! or ?. When it matches, it runs
+quickly. However, if it is applied to
+</P>
+<P>
+<pre>
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+</PRE>
+</P>
+<P>
+it takes a long time before reporting failure. This is because the string can
+be divided between the two repeats in a large number of ways, and all have to
+be tried. (The example used [!?] rather than a single character at the end,
+because both PCRE and Perl have an optimization that allows for fast failure
+when a single character is used. They remember the last single character that
+is required for a match, and fail early if it is not present in the string.)
+If the pattern is changed to
+</P>
+<P>
+<pre>
+  ((?&#62;\D+)|&#60;\d+&#62;)*[!?]
+</PRE>
+</P>
+<P>
+sequences of non-digits cannot be broken, and failure happens quickly.
+</P>
+<br><a name="SEC14" href="#TOC1">BACK REFERENCES</a><br>
+<P>
+Outside a character class, a backslash followed by a digit greater than 0 (and
+possibly further digits) is a back reference to a capturing subpattern earlier
+(that is, to its left) in the pattern, provided there have been that many
+previous capturing left parentheses.
+</P>
+<P>
+However, if the decimal number following the backslash is less than 10, it is
+always taken as a back reference, and causes an error only if there are not
+that many capturing left parentheses in the entire pattern. In other words, the
+parentheses that are referenced need not be to the left of the reference for
+numbers less than 10. See the section entitled "Backslash" above for further
+details of the handling of digits following a backslash.
+</P>
+<P>
+A back reference matches whatever actually matched the capturing subpattern in
+the current subject string, rather than anything matching the subpattern
+itself (see
+<a href="#subpatternsassubroutines">"Subpatterns as subroutines"</a>
+below for a way of doing that). So the pattern
+</P>
+<P>
+<pre>
+  (sens|respons)e and \1ibility
+</PRE>
+</P>
+<P>
+matches "sense and sensibility" and "response and responsibility", but not
+"sense and responsibility". If caseful matching is in force at the time of the
+back reference, the case of letters is relevant. For example,
+</P>
+<P>
+<pre>
+  ((?i)rah)\s+\1
+</PRE>
+</P>
+<P>
+matches "rah rah" and "RAH RAH", but not "RAH rah", even though the original
+capturing subpattern is matched caselessly.
+</P>
+<P>
+Back references to named subpatterns use the Python syntax (?P=name). We could
+rewrite the above example as follows:
+</P>
+<P>
+<pre>
+  (?&#60;p1&#62;(?i)rah)\s+(?P=p1)
+</PRE>
+</P>
+<P>
+There may be more than one back reference to the same subpattern. If a
+subpattern has not actually been used in a particular match, any back
+references to it always fail. For example, the pattern
+</P>
+<P>
+<pre>
+  (a|(bc))\2
+</PRE>
+</P>
+<P>
+always fails if it starts to match "a" rather than "bc". Because there may be
+many capturing parentheses in a pattern, all digits following the backslash are
+taken as part of a potential back reference number. If the pattern continues
+with a digit character, some delimiter must be used to terminate the back
+reference. If the PCRE_EXTENDED option is set, this can be whitespace.
+Otherwise an empty comment can be used.
+</P>
+<P>
+A back reference that occurs inside the parentheses to which it refers fails
+when the subpattern is first used, so, for example, (a\1) never matches.
+However, such references can be useful inside repeated subpatterns. For
+example, the pattern
+</P>
+<P>
+<pre>
+  (a|b\1)+
+</PRE>
+</P>
+<P>
+matches any number of "a"s and also "aba", "ababbaa" etc. At each iteration of
+the subpattern, the back reference matches the character string corresponding
+to the previous iteration. In order for this to work, the pattern must be such
+that the first iteration does not need to match the back reference. This can be
+done using alternation, as in the example above, or by a quantifier with a
+minimum of zero.
+</P>
+<br><a name="SEC15" href="#TOC1">ASSERTIONS</a><br>
+<P>
+An assertion is a test on the characters following or preceding the current
+matching point that does not actually consume any characters. The simple
+assertions coded as \b, \B, \A, \G, \Z, \z, ^ and $ are described above.
+More complicated assertions are coded as subpatterns. There are two kinds:
+those that look ahead of the current position in the subject string, and those
+that look behind it.
+</P>
+<P>
+An assertion subpattern is matched in the normal way, except that it does not
+cause the current matching position to be changed. Lookahead assertions start
+with (?= for positive assertions and (?! for negative assertions. For example,
+</P>
+<P>
+<pre>
+  \w+(?=;)
+</PRE>
+</P>
+<P>
+matches a word followed by a semicolon, but does not include the semicolon in
+the match, and
+</P>
+<P>
+<pre>
+  foo(?!bar)
+</PRE>
+</P>
+<P>
+matches any occurrence of "foo" that is not followed by "bar". Note that the
+apparently similar pattern
+</P>
+<P>
+<pre>
+  (?!foo)bar
+</PRE>
+</P>
+<P>
+does not find an occurrence of "bar" that is preceded by something other than
+"foo"; it finds any occurrence of "bar" whatsoever, because the assertion
+(?!foo) is always true when the next three characters are "bar". A
+lookbehind assertion is needed to achieve this effect.
+</P>
+<P>
+If you want to force a matching failure at some point in a pattern, the most
+convenient way to do it is with (?!) because an empty string always matches, so
+an assertion that requires there not to be an empty string must always fail.
+</P>
+<P>
+Lookbehind assertions start with (?&#60;= for positive assertions and (?&#60;! for
+negative assertions. For example,
+</P>
+<P>
+<pre>
+  (?&#60;!foo)bar
+</PRE>
+</P>
+<P>
+does find an occurrence of "bar" that is not preceded by "foo". The contents of
+a lookbehind assertion are restricted such that all the strings it matches must
+have a fixed length. However, if there are several alternatives, they do not
+all have to have the same fixed length. Thus
+</P>
+<P>
+<pre>
+  (?&#60;=bullock|donkey)
+</PRE>
+</P>
+<P>
+is permitted, but
+</P>
+<P>
+<pre>
+  (?&#60;!dogs?|cats?)
+</PRE>
+</P>
+<P>
+causes an error at compile time. Branches that match different length strings
+are permitted only at the top level of a lookbehind assertion. This is an
+extension compared with Perl (at least for 5.8), which requires all branches to
+match the same length of string. An assertion such as
+</P>
+<P>
+<pre>
+  (?&#60;=ab(c|de))
+</PRE>
+</P>
+<P>
+is not permitted, because its single top-level branch can match two different
+lengths, but it is acceptable if rewritten to use two top-level branches:
+</P>
+<P>
+<pre>
+  (?&#60;=abc|abde)
+</PRE>
+</P>
+<P>
+The implementation of lookbehind assertions is, for each alternative, to
+temporarily move the current position back by the fixed width and then try to
+match. If there are insufficient characters before the current position, the
+match is deemed to fail.
+</P>
+<P>
+PCRE does not allow the \C escape (which matches a single byte in UTF-8 mode)
+to appear in lookbehind assertions, because it makes it impossible to calculate
+the length of the lookbehind.
+</P>
+<P>
+Atomic groups can be used in conjunction with lookbehind assertions to specify
+efficient matching at the end of the subject string. Consider a simple pattern
+such as
+</P>
+<P>
+<pre>
+  abcd$
+</PRE>
+</P>
+<P>
+when applied to a long string that does not match. Because matching proceeds
+from left to right, PCRE will look for each "a" in the subject and then see if
+what follows matches the rest of the pattern. If the pattern is specified as
+</P>
+<P>
+<pre>
+  ^.*abcd$
+</PRE>
+</P>
+<P>
+the initial .* matches the entire string at first, but when this fails (because
+there is no following "a"), it backtracks to match all but the last character,
+then all but the last two characters, and so on. Once again the search for "a"
+covers the entire string, from right to left, so we are no better off. However,
+if the pattern is written as
+</P>
+<P>
+<pre>
+  ^(?&#62;.*)(?&#60;=abcd)
+</PRE>
+</P>
+<P>
+or, equivalently,
+</P>
+<P>
+<pre>
+  ^.*+(?&#60;=abcd)
+</PRE>
+</P>
+<P>
+there can be no backtracking for the .* item; it can match only the entire
+string. The subsequent lookbehind assertion does a single test on the last four
+characters. If it fails, the match fails immediately. For long strings, this
+approach makes a significant difference to the processing time.
+</P>
+<P>
+Several assertions (of any sort) may occur in succession. For example,
+</P>
+<P>
+<pre>
+  (?&#60;=\d{3})(?&#60;!999)foo
+</PRE>
+</P>
+<P>
+matches "foo" preceded by three digits that are not "999". Notice that each of
+the assertions is applied independently at the same point in the subject
+string. First there is a check that the previous three characters are all
+digits, and then there is a check that the same three characters are not "999".
+This pattern does <i>not</i> match "foo" preceded by six characters, the first
+of which are digits and the last three of which are not "999". For example, it
+doesn't match "123abcfoo". A pattern to do that is
+</P>
+<P>
+<pre>
+  (?&#60;=\d{3}...)(?&#60;!999)foo
+</PRE>
+</P>
+<P>
+This time the first assertion looks at the preceding six characters, checking
+that the first three are digits, and then the second assertion checks that the
+preceding three characters are not "999".
+</P>
+<P>
+Assertions can be nested in any combination. For example,
+</P>
+<P>
+<pre>
+  (?&#60;=(?&#60;!foo)bar)baz
+</PRE>
+</P>
+<P>
+matches an occurrence of "baz" that is preceded by "bar" which in turn is not
+preceded by "foo", while
+</P>
+<P>
+<pre>
+  (?&#60;=\d{3}(?!999)...)foo
+</PRE>
+</P>
+<P>
+is another pattern which matches "foo" preceded by three digits and any three
+characters that are not "999".
+</P>
+<P>
+Assertion subpatterns are not capturing subpatterns, and may not be repeated,
+because it makes no sense to assert the same thing several times. If any kind
+of assertion contains capturing subpatterns within it, these are counted for
+the purposes of numbering the capturing subpatterns in the whole pattern.
+However, substring capturing is carried out only for positive assertions,
+because it does not make sense for negative assertions.
+</P>
+<br><a name="SEC16" href="#TOC1">CONDITIONAL SUBPATTERNS</a><br>
+<P>
+It is possible to cause the matching process to obey a subpattern
+conditionally or to choose between two alternative subpatterns, depending on
+the result of an assertion, or whether a previous capturing subpattern matched
+or not. The two possible forms of conditional subpattern are
+</P>
+<P>
+<pre>
+  (?(condition)yes-pattern)
+  (?(condition)yes-pattern|no-pattern)
+</PRE>
+</P>
+<P>
+If the condition is satisfied, the yes-pattern is used; otherwise the
+no-pattern (if present) is used. If there are more than two alternatives in the
+subpattern, a compile-time error occurs.
+</P>
+<P>
+There are three kinds of condition. If the text between the parentheses
+consists of a sequence of digits, the condition is satisfied if the capturing
+subpattern of that number has previously matched. The number must be greater
+than zero. Consider the following pattern, which contains non-significant white
+space to make it more readable (assume the PCRE_EXTENDED option) and to divide
+it into three parts for ease of discussion:
+</P>
+<P>
+<pre>
+  ( \( )?    [^()]+    (?(1) \) )
+</PRE>
+</P>
+<P>
+The first part matches an optional opening parenthesis, and if that
+character is present, sets it as the first captured substring. The second part
+matches one or more characters that are not parentheses. The third part is a
+conditional subpattern that tests whether the first set of parentheses matched
+or not. If they did, that is, if subject started with an opening parenthesis,
+the condition is true, and so the yes-pattern is executed and a closing
+parenthesis is required. Otherwise, since no-pattern is not present, the
+subpattern matches nothing. In other words, this pattern matches a sequence of
+non-parentheses, optionally enclosed in parentheses.
+</P>
+<P>
+If the condition is the string (R), it is satisfied if a recursive call to the
+pattern or subpattern has been made. At "top level", the condition is false.
+This is a PCRE extension. Recursive patterns are described in the next section.
+</P>
+<P>
+If the condition is not a sequence of digits or (R), it must be an assertion.
+This may be a positive or negative lookahead or lookbehind assertion. Consider
+this pattern, again containing non-significant white space, and with the two
+alternatives on the second line:
+</P>
+<P>
+<pre>
+  (?(?=[^a-z]*[a-z])
+  \d{2}-[a-z]{3}-\d{2}  |  \d{2}-\d{2}-\d{2} )
+</PRE>
+</P>
+<P>
+The condition is a positive lookahead assertion that matches an optional
+sequence of non-letters followed by a letter. In other words, it tests for the
+presence of at least one letter in the subject. If a letter is found, the
+subject is matched against the first alternative; otherwise it is matched
+against the second. This pattern matches strings in one of the two forms
+dd-aaa-dd or dd-dd-dd, where aaa are letters and dd are digits.
+</P>
+<br><a name="SEC17" href="#TOC1">COMMENTS</a><br>
+<P>
+The sequence (?# marks the start of a comment which continues up to the next
+closing parenthesis. Nested parentheses are not permitted. The characters
+that make up a comment play no part in the pattern matching at all.
+</P>
+<P>
+If the PCRE_EXTENDED option is set, an unescaped # character outside a
+character class introduces a comment that continues up to the next newline
+character in the pattern.
+</P>
+<br><a name="SEC18" href="#TOC1">RECURSIVE PATTERNS</a><br>
+<P>
+Consider the problem of matching a string in parentheses, allowing for
+unlimited nested parentheses. Without the use of recursion, the best that can
+be done is to use a pattern that matches up to some fixed depth of nesting. It
+is not possible to handle an arbitrary nesting depth. Perl has provided an
+experimental facility that allows regular expressions to recurse (amongst other
+things). It does this by interpolating Perl code in the expression at run time,
+and the code can refer to the expression itself. A Perl pattern to solve the
+parentheses problem can be created like this:
+</P>
+<P>
+<pre>
+  $re = qr{\( (?: (?&#62;[^()]+) | (?p{$re}) )* \)}x;
+</PRE>
+</P>
+<P>
+The (?p{...}) item interpolates Perl code at run time, and in this case refers
+recursively to the pattern in which it appears. Obviously, PCRE cannot support
+the interpolation of Perl code. Instead, it supports some special syntax for
+recursion of the entire pattern, and also for individual subpattern recursion.
+</P>
+<P>
+The special item that consists of (? followed by a number greater than zero and
+a closing parenthesis is a recursive call of the subpattern of the given
+number, provided that it occurs inside that subpattern. (If not, it is a
+"subroutine" call, which is described in the next section.) The special item
+(?R) is a recursive call of the entire regular expression.
+</P>
+<P>
+For example, this PCRE pattern solves the nested parentheses problem (assume
+the PCRE_EXTENDED option is set so that white space is ignored):
+</P>
+<P>
+<pre>
+  \( ( (?&#62;[^()]+) | (?R) )* \)
+</PRE>
+</P>
+<P>
+First it matches an opening parenthesis. Then it matches any number of
+substrings which can either be a sequence of non-parentheses, or a recursive
+match of the pattern itself (that is a correctly parenthesized substring).
+Finally there is a closing parenthesis.
+</P>
+<P>
+If this were part of a larger pattern, you would not want to recurse the entire
+pattern, so instead you could use this:
+</P>
+<P>
+<pre>
+  ( \( ( (?&#62;[^()]+) | (?1) )* \) )
+</PRE>
+</P>
+<P>
+We have put the pattern into parentheses, and caused the recursion to refer to
+them instead of the whole pattern. In a larger pattern, keeping track of
+parenthesis numbers can be tricky. It may be more convenient to use named
+parentheses instead. For this, PCRE uses (?P&#62;name), which is an extension to
+the Python syntax that PCRE uses for named parentheses (Perl does not provide
+named parentheses). We could rewrite the above example as follows:
+</P>
+<P>
+<pre>
+  (?P&#60;pn&#62; \( ( (?&#62;[^()]+) | (?P&#62;pn) )* \) )
+</PRE>
+</P>
+<P>
+This particular example pattern contains nested unlimited repeats, and so the
+use of atomic grouping for matching strings of non-parentheses is important
+when applying the pattern to strings that do not match. For example, when this
+pattern is applied to
+</P>
+<P>
+<pre>
+  (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
+</PRE>
+</P>
+<P>
+it yields "no match" quickly. However, if atomic grouping is not used,
+the match runs for a very long time indeed because there are so many different
+ways the + and * repeats can carve up the subject, and all have to be tested
+before failure can be reported.
+</P>
+<P>
+At the end of a match, the values set for any capturing subpatterns are those
+from the outermost level of the recursion at which the subpattern value is set.
+If you want to obtain intermediate values, a callout function can be used (see
+below and the
+<a href="pcrecallout.html"><b>pcrecallout</b></a>
+documentation). If the pattern above is matched against
+</P>
+<P>
+<pre>
+  (ab(cd)ef)
+</PRE>
+</P>
+<P>
+the value for the capturing parentheses is "ef", which is the last value taken
+on at the top level. If additional parentheses are added, giving
+</P>
+<P>
+<pre>
+  \( ( ( (?&#62;[^()]+) | (?R) )* ) \)
+     ^                        ^
+     ^                        ^
+</PRE>
+</P>
+<P>
+the string they capture is "ab(cd)ef", the contents of the top level
+parentheses. If there are more than 15 capturing parentheses in a pattern, PCRE
+has to obtain extra memory to store data during a recursion, which it does by
+using <b>pcre_malloc</b>, freeing it via <b>pcre_free</b> afterwards. If no
+memory can be obtained, the match fails with the PCRE_ERROR_NOMEMORY error.
+</P>
+<P>
+Do not confuse the (?R) item with the condition (R), which tests for recursion.
+Consider this pattern, which matches text in angle brackets, allowing for
+arbitrary nesting. Only digits are allowed in nested brackets (that is, when
+recursing), whereas any characters are permitted at the outer level.
+</P>
+<P>
+<pre>
+  &#60; (?: (?(R) \d++  | [^&#60;&#62;]*+) | (?R)) * &#62;
+</PRE>
+</P>
+<P>
+In this pattern, (?(R) is the start of a conditional subpattern, with two
+different alternatives for the recursive and non-recursive cases. The (?R) item
+is the actual recursive call.
+</P>
+<a name="subpatternsassubroutines"></a><br><a name="SEC19" href="#TOC1">SUBPATTERNS AS SUBROUTINES</a><br>
+<P>
+If the syntax for a recursive subpattern reference (either by number or by
+name) is used outside the parentheses to which it refers, it operates like a
+subroutine in a programming language. An earlier example pointed out that the
+pattern
+</P>
+<P>
+<pre>
+  (sens|respons)e and \1ibility
+</PRE>
+</P>
+<P>
+matches "sense and sensibility" and "response and responsibility", but not
+"sense and responsibility". If instead the pattern
+</P>
+<P>
+<pre>
+  (sens|respons)e and (?1)ibility
+</PRE>
+</P>
+<P>
+is used, it does match "sense and responsibility" as well as the other two
+strings. Such references must, however, follow the subpattern to which they
+refer.
+</P>
+<br><a name="SEC20" href="#TOC1">CALLOUTS</a><br>
+<P>
+Perl has a feature whereby using the sequence (?{...}) causes arbitrary Perl
+code to be obeyed in the middle of matching a regular expression. This makes it
+possible, amongst other things, to extract different substrings that match the
+same pair of parentheses when there is a repetition.
+</P>
+<P>
+PCRE provides a similar feature, but of course it cannot obey arbitrary Perl
+code. The feature is called "callout". The caller of PCRE provides an external
+function by putting its entry point in the global variable <i>pcre_callout</i>.
+By default, this variable contains NULL, which disables all calling out.
+</P>
+<P>
+Within a regular expression, (?C) indicates the points at which the external
+function is to be called. If you want to identify different callout points, you
+can put a number less than 256 after the letter C. The default value is zero.
+For example, this pattern has two callout points:
+</P>
+<P>
+<pre>
+  (?C1)\dabc(?C2)def
+</PRE>
+</P>
+<P>
+During matching, when PCRE reaches a callout point (and <i>pcre_callout</i> is
+set), the external function is called. It is provided with the number of the
+callout, and, optionally, one item of data originally supplied by the caller of
+<b>pcre_exec()</b>. The callout function may cause matching to backtrack, or to
+fail altogether. A complete description of the interface to the callout
+function is given in the
+<a href="pcrecallout.html"><b>pcrecallout</b></a>
+documentation.
+</P>
+<P>
+Last updated: 03 February 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcreperform.html b/external-libs/pcre/doc/html/pcreperform.html
new file mode 100644
index 00000000..418ac6d4
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcreperform.html
@@ -0,0 +1,93 @@
+<html>
+<head>
+<title>pcreperform specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">PCRE PERFORMANCE</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">PCRE PERFORMANCE</a><br>
+<P>
+Certain items that may appear in regular expression patterns are more efficient
+than others. It is more efficient to use a character class like [aeiou] than a
+set of alternatives such as (a|e|i|o|u). In general, the simplest construction
+that provides the required behaviour is usually the most efficient. Jeffrey
+Friedl's book contains a lot of discussion about optimizing regular expressions
+for efficient performance.
+</P>
+<P>
+When a pattern begins with .* not in parentheses, or in parentheses that are
+not the subject of a backreference, and the PCRE_DOTALL option is set, the
+pattern is implicitly anchored by PCRE, since it can match only at the start of
+a subject string. However, if PCRE_DOTALL is not set, PCRE cannot make this
+optimization, because the . metacharacter does not then match a newline, and if
+the subject string contains newlines, the pattern may match from the character
+immediately following one of them instead of from the very start. For example,
+the pattern
+</P>
+<P>
+<pre>
+  .*second
+</PRE>
+</P>
+<P>
+matches the subject "first\nand second" (where \n stands for a newline
+character), with the match starting at the seventh character. In order to do
+this, PCRE has to retry the match starting after every newline in the subject.
+</P>
+<P>
+If you are using such a pattern with subject strings that do not contain
+newlines, the best performance is obtained by setting PCRE_DOTALL, or starting
+the pattern with ^.* to indicate explicit anchoring. That saves PCRE from
+having to scan along the subject looking for a newline to restart at.
+</P>
+<P>
+Beware of patterns that contain nested indefinite repeats. These can take a
+long time to run when applied to a string that does not match. Consider the
+pattern fragment
+</P>
+<P>
+<pre>
+  (a+)*
+</PRE>
+</P>
+<P>
+This can match "aaaa" in 33 different ways, and this number increases very
+rapidly as the string gets longer. (The * repeat can match 0, 1, 2, 3, or 4
+times, and for each of those cases other than 0, the + repeats can match
+different numbers of times.) When the remainder of the pattern is such that the
+entire match is going to fail, PCRE has in principle to try every possible
+variation, and this can take an extremely long time.
+</P>
+<P>
+An optimization catches some of the more simple cases such as
+</P>
+<P>
+<pre>
+  (a+)*b
+</PRE>
+</P>
+<P>
+where a literal character follows. Before embarking on the standard matching
+procedure, PCRE checks that there is a "b" later in the subject string, and if
+there is not, it fails the match immediately. However, when there is no
+following literal this optimization cannot be used. You can see the difference
+by comparing the behaviour of
+</P>
+<P>
+<pre>
+  (a+)*\d
+</PRE>
+</P>
+<P>
+with the pattern above. The former gives a failure almost instantly when
+applied to a whole line of "a" characters, whereas the latter takes an
+appreciable time with strings longer than about 20 characters.
+</P>
+<P>
+Last updated: 03 February 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcreposix.html b/external-libs/pcre/doc/html/pcreposix.html
new file mode 100644
index 00000000..d0a5e127
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcreposix.html
@@ -0,0 +1,237 @@
+<html>
+<head>
+<title>pcreposix specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">SYNOPSIS OF POSIX API</a>
+<li><a name="TOC2" href="#SEC2">DESCRIPTION</a>
+<li><a name="TOC3" href="#SEC3">COMPILING A PATTERN</a>
+<li><a name="TOC4" href="#SEC4">MATCHING NEWLINE CHARACTERS</a>
+<li><a name="TOC5" href="#SEC5">MATCHING A PATTERN</a>
+<li><a name="TOC6" href="#SEC6">ERROR MESSAGES</a>
+<li><a name="TOC7" href="#SEC7">STORAGE</a>
+<li><a name="TOC8" href="#SEC8">AUTHOR</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">SYNOPSIS OF POSIX API</a><br>
+<P>
+<b>#include &#60;pcreposix.h&#62;</b>
+</P>
+<P>
+<b>int regcomp(regex_t *<i>preg</i>, const char *<i>pattern</i>,</b>
+<b>int <i>cflags</i>);</b>
+</P>
+<P>
+<b>int regexec(regex_t *<i>preg</i>, const char *<i>string</i>,</b>
+<b>size_t <i>nmatch</i>, regmatch_t <i>pmatch</i>[], int <i>eflags</i>);</b>
+</P>
+<P>
+<b>size_t regerror(int <i>errcode</i>, const regex_t *<i>preg</i>,</b>
+<b>char *<i>errbuf</i>, size_t <i>errbuf_size</i>);</b>
+</P>
+<P>
+<b>void regfree(regex_t *<i>preg</i>);</b>
+</P>
+<br><a name="SEC2" href="#TOC1">DESCRIPTION</a><br>
+<P>
+This set of functions provides a POSIX-style API to the PCRE regular expression
+package. See the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+documentation for a description of the native API, which contains additional
+functionality.
+</P>
+<P>
+The functions described here are just wrapper functions that ultimately call
+the PCRE native API. Their prototypes are defined in the <b>pcreposix.h</b>
+header file, and on Unix systems the library itself is called
+<b>pcreposix.a</b>, so can be accessed by adding <b>-lpcreposix</b> to the
+command for linking an application which uses them. Because the POSIX functions
+call the native ones, it is also necessary to add \fR-lpcre\fR.
+</P>
+<P>
+I have implemented only those option bits that can be reasonably mapped to PCRE
+native options. In addition, the options REG_EXTENDED and REG_NOSUB are defined
+with the value zero. They have no effect, but since programs that are written
+to the POSIX interface often use them, this makes it easier to slot in PCRE as
+a replacement library. Other POSIX options are not even defined.
+</P>
+<P>
+When PCRE is called via these functions, it is only the API that is POSIX-like
+in style. The syntax and semantics of the regular expressions themselves are
+still those of Perl, subject to the setting of various PCRE options, as
+described below. "POSIX-like in style" means that the API approximates to the
+POSIX definition; it is not fully POSIX-compatible, and in multi-byte encoding
+domains it is probably even less compatible.
+</P>
+<P>
+The header for these functions is supplied as <b>pcreposix.h</b> to avoid any
+potential clash with other POSIX libraries. It can, of course, be renamed or
+aliased as <b>regex.h</b>, which is the "correct" name. It provides two
+structure types, <i>regex_t</i> for compiled internal forms, and
+<i>regmatch_t</i> for returning captured substrings. It also defines some
+constants whose names start with "REG_"; these are used for setting options and
+identifying error codes.
+</P>
+<br><a name="SEC3" href="#TOC1">COMPILING A PATTERN</a><br>
+<P>
+The function <b>regcomp()</b> is called to compile a pattern into an
+internal form. The pattern is a C string terminated by a binary zero, and
+is passed in the argument <i>pattern</i>. The <i>preg</i> argument is a pointer
+to a regex_t structure which is used as a base for storing information about
+the compiled expression.
+</P>
+<P>
+The argument <i>cflags</i> is either zero, or contains one or more of the bits
+defined by the following macros:
+</P>
+<P>
+<pre>
+  REG_ICASE
+</PRE>
+</P>
+<P>
+The PCRE_CASELESS option is set when the expression is passed for compilation
+to the native function.
+</P>
+<P>
+<pre>
+  REG_NEWLINE
+</PRE>
+</P>
+<P>
+The PCRE_MULTILINE option is set when the expression is passed for compilation
+to the native function. Note that this does <i>not</i> mimic the defined POSIX
+behaviour for REG_NEWLINE (see the following section).
+</P>
+<P>
+In the absence of these flags, no options are passed to the native function.
+This means the the regex is compiled with PCRE default semantics. In
+particular, the way it handles newline characters in the subject string is the
+Perl way, not the POSIX way. Note that setting PCRE_MULTILINE has only
+<i>some</i> of the effects specified for REG_NEWLINE. It does not affect the way
+newlines are matched by . (they aren't) or by a negative class such as [^a]
+(they are).
+</P>
+<P>
+The yield of <b>regcomp()</b> is zero on success, and non-zero otherwise. The
+<i>preg</i> structure is filled in on success, and one member of the structure
+is public: <i>re_nsub</i> contains the number of capturing subpatterns in
+the regular expression. Various error codes are defined in the header file.
+</P>
+<br><a name="SEC4" href="#TOC1">MATCHING NEWLINE CHARACTERS</a><br>
+<P>
+This area is not simple, because POSIX and Perl take different views of things.
+It is not possible to get PCRE to obey POSIX semantics, but then PCRE was never
+intended to be a POSIX engine. The following table lists the different
+possibilities for matching newline characters in PCRE:
+</P>
+<P>
+<pre>
+                          Default   Change with
+</PRE>
+</P>
+<P>
+<pre>
+  . matches newline          no     PCRE_DOTALL
+  newline matches [^a]       yes    not changeable
+  $ matches \n at end        yes    PCRE_DOLLARENDONLY
+  $ matches \n in middle     no     PCRE_MULTILINE
+  ^ matches \n in middle     no     PCRE_MULTILINE
+</PRE>
+</P>
+<P>
+This is the equivalent table for POSIX:
+</P>
+<P>
+<pre>
+                          Default   Change with
+</PRE>
+</P>
+<P>
+<pre>
+  . matches newline          yes      REG_NEWLINE
+  newline matches [^a]       yes      REG_NEWLINE
+  $ matches \n at end        no       REG_NEWLINE
+  $ matches \n in middle     no       REG_NEWLINE
+  ^ matches \n in middle     no       REG_NEWLINE
+</PRE>
+</P>
+<P>
+PCRE's behaviour is the same as Perl's, except that there is no equivalent for
+PCRE_DOLLARENDONLY in Perl. In both PCRE and Perl, there is no way to stop
+newline from matching [^a].
+</P>
+<P>
+The default POSIX newline handling can be obtained by setting PCRE_DOTALL and
+PCRE_DOLLARENDONLY, but there is no way to make PCRE behave exactly as for the
+REG_NEWLINE action.
+</P>
+<br><a name="SEC5" href="#TOC1">MATCHING A PATTERN</a><br>
+<P>
+The function <b>regexec()</b> is called to match a pre-compiled pattern
+<i>preg</i> against a given <i>string</i>, which is terminated by a zero byte,
+subject to the options in <i>eflags</i>. These can be:
+</P>
+<P>
+<pre>
+  REG_NOTBOL
+</PRE>
+</P>
+<P>
+The PCRE_NOTBOL option is set when calling the underlying PCRE matching
+function.
+</P>
+<P>
+<pre>
+  REG_NOTEOL
+</PRE>
+</P>
+<P>
+The PCRE_NOTEOL option is set when calling the underlying PCRE matching
+function.
+</P>
+<P>
+The portion of the string that was matched, and also any captured substrings,
+are returned via the <i>pmatch</i> argument, which points to an array of
+<i>nmatch</i> structures of type <i>regmatch_t</i>, containing the members
+<i>rm_so</i> and <i>rm_eo</i>. These contain the offset to the first character of
+each substring and the offset to the first character after the end of each
+substring, respectively. The 0th element of the vector relates to the entire
+portion of <i>string</i> that was matched; subsequent elements relate to the
+capturing subpatterns of the regular expression. Unused entries in the array
+have both structure members set to -1.
+</P>
+<P>
+A successful match yields a zero return; various error codes are defined in the
+header file, of which REG_NOMATCH is the "expected" failure code.
+</P>
+<br><a name="SEC6" href="#TOC1">ERROR MESSAGES</a><br>
+<P>
+The <b>regerror()</b> function maps a non-zero errorcode from either
+<b>regcomp()</b> or <b>regexec()</b> to a printable message. If <i>preg</i> is not
+NULL, the error should have arisen from the use of that structure. A message
+terminated by a binary zero is placed in <i>errbuf</i>. The length of the
+message, including the zero, is limited to <i>errbuf_size</i>. The yield of the
+function is the size of buffer needed to hold the whole message.
+</P>
+<br><a name="SEC7" href="#TOC1">STORAGE</a><br>
+<P>
+Compiling a regular expression causes memory to be allocated and associated
+with the <i>preg</i> structure. The function <b>regfree()</b> frees all such
+memory, after which <i>preg</i> may no longer be used as a compiled expression.
+</P>
+<br><a name="SEC8" href="#TOC1">AUTHOR</a><br>
+<P>
+Philip Hazel &#60;ph10@cam.ac.uk&#62;
+<br>
+University Computing Service,
+<br>
+Cambridge CB2 3QG, England.
+</P>
+<P>
+Last updated: 03 February 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcresample.html b/external-libs/pcre/doc/html/pcresample.html
new file mode 100644
index 00000000..fed41f62
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcresample.html
@@ -0,0 +1,79 @@
+<html>
+<head>
+<title>pcresample specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">PCRE SAMPLE PROGRAM</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">PCRE SAMPLE PROGRAM</a><br>
+<P>
+A simple, complete demonstration program, to get you started with using PCRE,
+is supplied in the file <i>pcredemo.c</i> in the PCRE distribution.
+</P>
+<P>
+The program compiles the regular expression that is its first argument, and
+matches it against the subject string in its second argument. No PCRE options
+are set, and default character tables are used. If matching succeeds, the
+program outputs the portion of the subject that matched, together with the
+contents of any captured substrings.
+</P>
+<P>
+If the -g option is given on the command line, the program then goes on to
+check for further matches of the same regular expression in the same subject
+string. The logic is a little bit tricky because of the possibility of matching
+an empty string. Comments in the code explain what is going on.
+</P>
+<P>
+On a Unix system that has PCRE installed in <i>/usr/local</i>, you can compile
+the demonstration program using a command like this:
+</P>
+<P>
+<pre>
+  gcc -o pcredemo pcredemo.c -I/usr/local/include \
+      -L/usr/local/lib -lpcre
+</PRE>
+</P>
+<P>
+Then you can run simple tests like this:
+</P>
+<P>
+<pre>
+  ./pcredemo 'cat|dog' 'the cat sat on the mat'
+  ./pcredemo -g 'cat|dog' 'the dog sat on the cat'
+</PRE>
+</P>
+<P>
+Note that there is a much more comprehensive test program, called
+<b>pcretest</b>, which supports many more facilities for testing regular
+expressions and the PCRE library. The <b>pcredemo</b> program is provided as a
+simple coding example.
+</P>
+<P>
+On some operating systems (e.g. Solaris) you may get an error like this when
+you try to run <b>pcredemo</b>:
+</P>
+<P>
+<pre>
+  ld.so.1: a.out: fatal: libpcre.so.0: open failed: No such file or directory
+</PRE>
+</P>
+<P>
+This is caused by the way shared library support works on those systems. You
+need to add
+</P>
+<P>
+<pre>
+  -R/usr/local/lib
+</PRE>
+</P>
+<P>
+to the compile command to get round this problem.
+</P>
+<P>
+Last updated: 28 January 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/html/pcretest.html b/external-libs/pcre/doc/html/pcretest.html
new file mode 100644
index 00000000..2ba9893d
--- /dev/null
+++ b/external-libs/pcre/doc/html/pcretest.html
@@ -0,0 +1,443 @@
+<html>
+<head>
+<title>pcretest specification</title>
+</head>
+<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
+This HTML document has been generated automatically from the original man page.
+If there is any nonsense in it, please consult the man page, in case the
+conversion went wrong.<br>
+<ul>
+<li><a name="TOC1" href="#SEC1">SYNOPSIS</a>
+<li><a name="TOC2" href="#SEC2">OPTIONS</a>
+<li><a name="TOC3" href="#SEC3">DESCRIPTION</a>
+<li><a name="TOC4" href="#SEC4">PATTERN MODIFIERS</a>
+<li><a name="TOC5" href="#SEC5">CALLOUTS</a>
+<li><a name="TOC6" href="#SEC6">DATA LINES</a>
+<li><a name="TOC7" href="#SEC7">OUTPUT FROM PCRETEST</a>
+<li><a name="TOC8" href="#SEC8">AUTHOR</a>
+</ul>
+<br><a name="SEC1" href="#TOC1">SYNOPSIS</a><br>
+<P>
+<b>pcretest [-d] [-i] [-m] [-o osize] [-p] [-t] [source] [destination]</b>
+</P>
+<P>
+<b>pcretest</b> was written as a test program for the PCRE regular expression
+library itself, but it can also be used for experimenting with regular
+expressions. This document describes the features of the test program; for
+details of the regular expressions themselves, see the
+<a href="pcrepattern.html"><b>pcrepattern</b></a>
+documentation. For details of PCRE and its options, see the
+<a href="pcreapi.html"><b>pcreapi</b></a>
+documentation.
+</P>
+<br><a name="SEC2" href="#TOC1">OPTIONS</a><br>
+<P>
+<b>-C</b>
+Output the version number of the PCRE library, and all available information
+about the optional features that are included, and then exit.
+</P>
+<P>
+<b>-d</b>
+Behave as if each regex had the <b>/D</b> modifier (see below); the internal
+form is output after compilation.
+</P>
+<P>
+<b>-i</b>
+Behave as if each regex had the <b>/I</b> modifier; information about the
+compiled pattern is given after compilation.
+</P>
+<P>
+<b>-m</b>
+Output the size of each compiled pattern after it has been compiled. This is
+equivalent to adding /M to each regular expression. For compatibility with
+earlier versions of pcretest, <b>-s</b> is a synonym for <b>-m</b>.
+</P>
+<P>
+<b>-o</b> <i>osize</i>
+Set the number of elements in the output vector that is used when calling PCRE
+to be <i>osize</i>. The default value is 45, which is enough for 14 capturing
+subexpressions. The vector size can be changed for individual matching calls by
+including \O in the data line (see below).
+</P>
+<P>
+<b>-p</b>
+Behave as if each regex has <b>/P</b> modifier; the POSIX wrapper API is used
+to call PCRE. None of the other options has any effect when <b>-p</b> is set.
+</P>
+<P>
+<b>-t</b>
+Run each compile, study, and match many times with a timer, and output
+resulting time per compile or match (in milliseconds). Do not set <b>-t</b> with
+<b>-m</b>, because you will then get the size output 20000 times and the timing
+will be distorted.
+</P>
+<br><a name="SEC3" href="#TOC1">DESCRIPTION</a><br>
+<P>
+If <b>pcretest</b> is given two filename arguments, it reads from the first and
+writes to the second. If it is given only one filename argument, it reads from
+that file and writes to stdout. Otherwise, it reads from stdin and writes to
+stdout, and prompts for each line of input, using "re&#62;" to prompt for regular
+expressions, and "data&#62;" to prompt for data lines.
+</P>
+<P>
+The program handles any number of sets of input on a single input file. Each
+set starts with a regular expression, and continues with any number of data
+lines to be matched against the pattern.
+</P>
+<P>
+Each line is matched separately and independently. If you want to do
+multiple-line matches, you have to use the \n escape sequence in a single line
+of input to encode the newline characters. The maximum length of data line is
+30,000 characters.
+</P>
+<P>
+An empty line signals the end of the data lines, at which point a new regular
+expression is read. The regular expressions are given enclosed in any
+non-alphameric delimiters other than backslash, for example
+</P>
+<P>
+<pre>
+  /(a|bc)x+yz/
+</PRE>
+</P>
+<P>
+White space before the initial delimiter is ignored. A regular expression may
+be continued over several input lines, in which case the newline characters are
+included within it. It is possible to include the delimiter within the pattern
+by escaping it, for example
+</P>
+<P>
+<pre>
+  /abc\/def/
+</PRE>
+</P>
+<P>
+If you do so, the escape and the delimiter form part of the pattern, but since
+delimiters are always non-alphameric, this does not affect its interpretation.
+If the terminating delimiter is immediately followed by a backslash, for
+example,
+</P>
+<P>
+<pre>
+  /abc/\
+</PRE>
+</P>
+<P>
+then a backslash is added to the end of the pattern. This is done to provide a
+way of testing the error condition that arises if a pattern finishes with a
+backslash, because
+</P>
+<P>
+<pre>
+  /abc\/
+</PRE>
+</P>
+<P>
+is interpreted as the first line of a pattern that starts with "abc/", causing
+pcretest to read the next line as a continuation of the regular expression.
+</P>
+<br><a name="SEC4" href="#TOC1">PATTERN MODIFIERS</a><br>
+<P>
+The pattern may be followed by <b>i</b>, <b>m</b>, <b>s</b>, or <b>x</b> to set the
+PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, or PCRE_EXTENDED options,
+respectively. For example:
+</P>
+<P>
+<pre>
+  /caseless/i
+</PRE>
+</P>
+<P>
+These modifier letters have the same effect as they do in Perl. There are
+others that set PCRE options that do not correspond to anything in Perl:
+<b>/A</b>, <b>/E</b>, <b>/N</b>, <b>/U</b>, and <b>/X</b> set PCRE_ANCHORED,
+PCRE_DOLLAR_ENDONLY, PCRE_NO_AUTO_CAPTURE, PCRE_UNGREEDY, and PCRE_EXTRA
+respectively.
+</P>
+<P>
+Searching for all possible matches within each subject string can be requested
+by the <b>/g</b> or <b>/G</b> modifier. After finding a match, PCRE is called
+again to search the remainder of the subject string. The difference between
+<b>/g</b> and <b>/G</b> is that the former uses the <i>startoffset</i> argument to
+<b>pcre_exec()</b> to start searching at a new point within the entire string
+(which is in effect what Perl does), whereas the latter passes over a shortened
+substring. This makes a difference to the matching process if the pattern
+begins with a lookbehind assertion (including \b or \B).
+</P>
+<P>
+If any call to <b>pcre_exec()</b> in a <b>/g</b> or <b>/G</b> sequence matches an
+empty string, the next call is done with the PCRE_NOTEMPTY and PCRE_ANCHORED
+flags set in order to search for another, non-empty, match at the same point.
+If this second match fails, the start offset is advanced by one, and the normal
+match is retried. This imitates the way Perl handles such cases when using the
+<b>/g</b> modifier or the <b>split()</b> function.
+</P>
+<P>
+There are a number of other modifiers for controlling the way <b>pcretest</b>
+operates.
+</P>
+<P>
+The <b>/+</b> modifier requests that as well as outputting the substring that
+matched the entire pattern, pcretest should in addition output the remainder of
+the subject string. This is useful for tests where the subject contains
+multiple copies of the same substring.
+</P>
+<P>
+The <b>/L</b> modifier must be followed directly by the name of a locale, for
+example,
+</P>
+<P>
+<pre>
+  /pattern/Lfr
+</PRE>
+</P>
+<P>
+For this reason, it must be the last modifier letter. The given locale is set,
+<b>pcre_maketables()</b> is called to build a set of character tables for the
+locale, and this is then passed to <b>pcre_compile()</b> when compiling the
+regular expression. Without an <b>/L</b> modifier, NULL is passed as the tables
+pointer; that is, <b>/L</b> applies only to the expression on which it appears.
+</P>
+<P>
+The <b>/I</b> modifier requests that <b>pcretest</b> output information about the
+compiled expression (whether it is anchored, has a fixed first character, and
+so on). It does this by calling <b>pcre_fullinfo()</b> after compiling an
+expression, and outputting the information it gets back. If the pattern is
+studied, the results of that are also output.
+</P>
+<P>
+The <b>/D</b> modifier is a PCRE debugging feature, which also assumes <b>/I</b>.
+It causes the internal form of compiled regular expressions to be output after
+compilation. If the pattern was studied, the information returned is also
+output.
+</P>
+<P>
+The <b>/S</b> modifier causes <b>pcre_study()</b> to be called after the
+expression has been compiled, and the results used when the expression is
+matched.
+</P>
+<P>
+The <b>/M</b> modifier causes the size of memory block used to hold the compiled
+pattern to be output.
+</P>
+<P>
+The <b>/P</b> modifier causes <b>pcretest</b> to call PCRE via the POSIX wrapper
+API rather than its native API. When this is done, all other modifiers except
+<b>/i</b>, <b>/m</b>, and <b>/+</b> are ignored. REG_ICASE is set if <b>/i</b> is
+present, and REG_NEWLINE is set if <b>/m</b> is present. The wrapper functions
+force PCRE_DOLLAR_ENDONLY always, and PCRE_DOTALL unless REG_NEWLINE is set.
+</P>
+<P>
+The <b>/8</b> modifier causes <b>pcretest</b> to call PCRE with the PCRE_UTF8
+option set. This turns on support for UTF-8 character handling in PCRE,
+provided that it was compiled with this support enabled. This modifier also
+causes any non-printing characters in output strings to be printed using the
+\x{hh...} notation if they are valid UTF-8 sequences.
+</P>
+<P>
+If the <b>/?</b> modifier is used with <b>/8</b>, it causes <b>pcretest</b> to
+call <b>pcre_compile()</b> with the PCRE_NO_UTF8_CHECK option, to suppress the
+checking of the string for UTF-8 validity.
+</P>
+<br><a name="SEC5" href="#TOC1">CALLOUTS</a><br>
+<P>
+If the pattern contains any callout requests, <b>pcretest</b>'s callout function
+will be called. By default, it displays the callout number, and the start and
+current positions in the text at the callout time. For example, the output
+</P>
+<P>
+<pre>
+  ---&#62;pqrabcdef
+    0    ^  ^
+</PRE>
+</P>
+<P>
+indicates that callout number 0 occurred for a match attempt starting at the
+fourth character of the subject string, when the pointer was at the seventh
+character. The callout function returns zero (carry on matching) by default.
+</P>
+<P>
+Inserting callouts may be helpful when using <b>pcretest</b> to check
+complicated regular expressions. For further information about callouts, see
+the
+<a href="pcrecallout.html"><b>pcrecallout</b></a>
+documentation.
+</P>
+<P>
+For testing the PCRE library, additional control of callout behaviour is
+available via escape sequences in the data, as described in the following
+section. In particular, it is possible to pass in a number as callout data (the
+default is zero). If the callout function receives a non-zero number, it
+returns that value instead of zero.
+</P>
+<br><a name="SEC6" href="#TOC1">DATA LINES</a><br>
+<P>
+Before each data line is passed to <b>pcre_exec()</b>, leading and trailing
+whitespace is removed, and it is then scanned for \ escapes. Some of these are
+pretty esoteric features, intended for checking out some of the more
+complicated features of PCRE. If you are just testing "ordinary" regular
+expressions, you probably don't need any of these. The following escapes are
+recognized:
+</P>
+<P>
+<pre>
+  \a         alarm (= BEL)
+  \b         backspace
+  \e         escape
+  \f         formfeed
+  \n         newline
+  \r         carriage return
+  \t         tab
+  \v         vertical tab
+  \nnn       octal character (up to 3 octal digits)
+  \xhh       hexadecimal character (up to 2 hex digits)
+  \x{hh...}  hexadecimal character, any number of digits
+               in UTF-8 mode
+  \A         pass the PCRE_ANCHORED option to <b>pcre_exec()</b>
+  \B         pass the PCRE_NOTBOL option to <b>pcre_exec()</b>
+  \Cdd       call pcre_copy_substring() for substring dd
+               after a successful match (any decimal number
+               less than 32)
+  \Cname     call pcre_copy_named_substring() for substring
+               "name" after a successful match (name termin-
+               ated by next non alphanumeric character)
+  \C+        show the current captured substrings at callout
+               time
+  \C-        do not supply a callout function
+  \C!n       return 1 instead of 0 when callout number n is
+               reached
+  \C!n!m     return 1 instead of 0 when callout number n is
+               reached for the nth time
+  \C*n       pass the number n (may be negative) as callout
+               data
+  \Gdd       call pcre_get_substring() for substring dd
+               after a successful match (any decimal number
+               less than 32)
+  \Gname     call pcre_get_named_substring() for substring
+               "name" after a successful match (name termin-
+               ated by next non-alphanumeric character)
+  \L         call pcre_get_substringlist() after a
+               successful match
+  \M         discover the minimum MATCH_LIMIT setting
+  \N         pass the PCRE_NOTEMPTY option to <b>pcre_exec()</b>
+  \Odd       set the size of the output vector passed to
+               <b>pcre_exec()</b> to dd (any number of decimal
+               digits)
+  \S         output details of memory get/free calls during matching
+  \Z         pass the PCRE_NOTEOL option to <b>pcre_exec()</b>
+  \?         pass the PCRE_NO_UTF8_CHECK option to
+               <b>pcre_exec()</b>
+</PRE>
+</P>
+<P>
+If \M is present, <b>pcretest</b> calls <b>pcre_exec()</b> several times, with
+different values in the <i>match_limit</i> field of the <b>pcre_extra</b> data
+structure, until it finds the minimum number that is needed for
+<b>pcre_exec()</b> to complete. This number is a measure of the amount of
+recursion and backtracking that takes place, and checking it out can be
+instructive. For most simple matches, the number is quite small, but for
+patterns with very large numbers of matching possibilities, it can become large
+very quickly with increasing length of subject string.
+</P>
+<P>
+When \O is used, it may be higher or lower than the size set by the <b>-O</b>
+option (or defaulted to 45); \O applies only to the call of <b>pcre_exec()</b>
+for the line in which it appears.
+</P>
+<P>
+A backslash followed by anything else just escapes the anything else. If the
+very last character is a backslash, it is ignored. This gives a way of passing
+an empty line as data, since a real empty line terminates the data input.
+</P>
+<P>
+If <b>/P</b> was present on the regex, causing the POSIX wrapper API to be used,
+only <b>\B</b>, and <b>\Z</b> have any effect, causing REG_NOTBOL and REG_NOTEOL
+to be passed to <b>regexec()</b> respectively.
+</P>
+<P>
+The use of \x{hh...} to represent UTF-8 characters is not dependent on the use
+of the <b>/8</b> modifier on the pattern. It is recognized always. There may be
+any number of hexadecimal digits inside the braces. The result is from one to
+six bytes, encoded according to the UTF-8 rules.
+</P>
+<br><a name="SEC7" href="#TOC1">OUTPUT FROM PCRETEST</a><br>
+<P>
+When a match succeeds, pcretest outputs the list of captured substrings that
+<b>pcre_exec()</b> returns, starting with number 0 for the string that matched
+the whole pattern. Here is an example of an interactive pcretest run.
+</P>
+<P>
+<pre>
+  $ pcretest
+  PCRE version 4.00 08-Jan-2003
+</PRE>
+</P>
+<P>
+<pre>
+    re&#62; /^abc(\d+)/
+  data&#62; abc123
+   0: abc123
+   1: 123
+  data&#62; xyz
+  No match
+</PRE>
+</P>
+<P>
+If the strings contain any non-printing characters, they are output as \0x
+escapes, or as \x{...} escapes if the <b>/8</b> modifier was present on the
+pattern. If the pattern has the <b>/+</b> modifier, then the output for
+substring 0 is followed by the the rest of the subject string, identified by
+"0+" like this:
+</P>
+<P>
+<pre>
+    re&#62; /cat/+
+  data&#62; cataract
+   0: cat
+   0+ aract
+</PRE>
+</P>
+<P>
+If the pattern has the <b>/g</b> or <b>/G</b> modifier, the results of successive
+matching attempts are output in sequence, like this:
+</P>
+<P>
+<pre>
+    re&#62; /\Bi(\w\w)/g
+  data&#62; Mississippi
+   0: iss
+   1: ss
+   0: iss
+   1: ss
+   0: ipp
+   1: pp
+</PRE>
+</P>
+<P>
+"No match" is output only if the first match attempt fails.
+</P>
+<P>
+If any of the sequences <b>\C</b>, <b>\G</b>, or <b>\L</b> are present in a
+data line that is successfully matched, the substrings extracted by the
+convenience functions are output with C, G, or L after the string number
+instead of a colon. This is in addition to the normal full list. The string
+length (that is, the return from the extraction function) is given in
+parentheses after each string for <b>\C</b> and <b>\G</b>.
+</P>
+<P>
+Note that while patterns can be continued over several lines (a plain "&#62;"
+prompt is used for continuations), data lines may not. However newlines can be
+included in data by means of the \n escape.
+</P>
+<br><a name="SEC8" href="#TOC1">AUTHOR</a><br>
+<P>
+Philip Hazel &#60;ph10@cam.ac.uk&#62;
+<br>
+University Computing Service,
+<br>
+Cambridge CB2 3QG, England.
+</P>
+<P>
+Last updated: 09 December 2003
+<br>
+Copyright &copy; 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcre.3 b/external-libs/pcre/doc/pcre.3
new file mode 100644
index 00000000..c0c71419
--- /dev/null
+++ b/external-libs/pcre/doc/pcre.3
@@ -0,0 +1,174 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH DESCRIPTION
+.rs
+.sp
+The PCRE library is a set of functions that implement regular expression
+pattern matching using the same syntax and semantics as Perl, with just a few
+differences. The current implementation of PCRE (release 4.x) corresponds
+approximately with Perl 5.8, including support for UTF-8 encoded strings.
+However, this support has to be explicitly enabled; it is not the default.
+
+PCRE is written in C and released as a C library. However, a number of people
+have written wrappers and interfaces of various kinds. A C++ class is included
+in these contributions, which can be found in the \fIContrib\fR directory at
+the primary FTP site, which is:
+
+.\" HTML <a href="ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre">
+.\" </a>
+ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre
+
+Details of exactly which Perl regular expression features are and are not
+supported by PCRE are given in separate documents. See the
+.\" HREF
+\fBpcrepattern\fR
+.\"
+and
+.\" HREF
+\fBpcrecompat\fR
+.\"
+pages.
+
+Some features of PCRE can be included, excluded, or changed when the library is
+built. The
+.\" HREF
+\fBpcre_config()\fR
+.\"
+function makes it possible for a client to discover which features are
+available. Documentation about building PCRE for various operating systems can
+be found in the \fBREADME\fR file in the source distribution.
+
+.SH USER DOCUMENTATION
+.rs
+.sp
+The user documentation for PCRE has been split up into a number of different
+sections. In the "man" format, each of these is a separate "man page". In the
+HTML format, each is a separate page, linked from the index page. In the plain
+text format, all the sections are concatenated, for ease of searching. The
+sections are as follows:
+
+  pcre              this document
+  pcreapi           details of PCRE's native API
+  pcrebuild         options for building PCRE
+  pcrecallout       details of the callout feature
+  pcrecompat        discussion of Perl compatibility
+  pcregrep          description of the \fBpcregrep\fR command
+  pcrepattern       syntax and semantics of supported
+                      regular expressions
+  pcreperform       discussion of performance issues
+  pcreposix         the POSIX-compatible API
+  pcresample        discussion of the sample program
+  pcretest          the \fBpcretest\fR testing command
+
+In addition, in the "man" and HTML formats, there is a short page for each
+library function, listing its arguments and results.
+
+.SH LIMITATIONS
+.rs
+.sp
+There are some size limitations in PCRE but it is hoped that they will never in
+practice be relevant.
+
+The maximum length of a compiled pattern is 65539 (sic) bytes if PCRE is
+compiled with the default internal linkage size of 2. If you want to process
+regular expressions that are truly enormous, you can compile PCRE with an
+internal linkage size of 3 or 4 (see the \fBREADME\fR file in the source
+distribution and the
+.\" HREF
+\fBpcrebuild\fR
+.\"
+documentation for details). If these cases the limit is substantially larger.
+However, the speed of execution will be slower.
+
+All values in repeating quantifiers must be less than 65536.
+The maximum number of capturing subpatterns is 65535.
+
+There is no limit to the number of non-capturing subpatterns, but the maximum
+depth of nesting of all kinds of parenthesized subpattern, including capturing
+subpatterns, assertions, and other types of subpattern, is 200.
+
+The maximum length of a subject string is the largest positive number that an
+integer variable can hold. However, PCRE uses recursion to handle subpatterns
+and indefinite repetition. This means that the available stack space may limit
+the size of a subject string that can be processed by certain patterns.
+
+.\" HTML <a name="utf8support"></a>
+.SH UTF-8 SUPPORT
+.rs
+.sp
+Starting at release 3.3, PCRE has had some support for character strings
+encoded in the UTF-8 format. For release 4.0 this has been greatly extended to
+cover most common requirements.
+
+In order process UTF-8 strings, you must build PCRE to include UTF-8 support in
+the code, and, in addition, you must call
+.\" HREF
+\fBpcre_compile()\fR
+.\"
+with the PCRE_UTF8 option flag. When you do this, both the pattern and any
+subject strings that are matched against it are treated as UTF-8 strings
+instead of just strings of bytes.
+
+If you compile PCRE with UTF-8 support, but do not use it at run time, the
+library will be a bit bigger, but the additional run time overhead is limited
+to testing the PCRE_UTF8 flag in several places, so should not be very large.
+
+The following comments apply when PCRE is running in UTF-8 mode:
+
+1. When you set the PCRE_UTF8 flag, the strings passed as patterns and subjects
+are checked for validity on entry to the relevant functions. If an invalid
+UTF-8 string is passed, an error return is given. In some situations, you may
+already know that your strings are valid, and therefore want to skip these
+checks in order to improve performance. If you set the PCRE_NO_UTF8_CHECK flag
+at compile time or at run time, PCRE assumes that the pattern or subject it
+is given (respectively) contains only valid UTF-8 codes. In this case, it does
+not diagnose an invalid UTF-8 string. If you pass an invalid UTF-8 string to
+PCRE when PCRE_NO_UTF8_CHECK is set, the results are undefined. Your program
+may crash.
+
+2. In a pattern, the escape sequence \\x{...}, where the contents of the braces
+is a string of hexadecimal digits, is interpreted as a UTF-8 character whose
+code number is the given hexadecimal number, for example: \\x{1234}. If a
+non-hexadecimal digit appears between the braces, the item is not recognized.
+This escape sequence can be used either as a literal, or within a character
+class.
+
+3. The original hexadecimal escape sequence, \\xhh, matches a two-byte UTF-8
+character if the value is greater than 127.
+
+4. Repeat quantifiers apply to complete UTF-8 characters, not to individual
+bytes, for example: \\x{100}{3}.
+
+5. The dot metacharacter matches one UTF-8 character instead of a single byte.
+
+6. The escape sequence \\C can be used to match a single byte in UTF-8 mode,
+but its use can lead to some strange effects.
+
+7. The character escapes \\b, \\B, \\d, \\D, \\s, \\S, \\w, and \\W correctly
+test characters of any code value, but the characters that PCRE recognizes as
+digits, spaces, or word characters remain the same set as before, all with
+values less than 256.
+
+8. Case-insensitive matching applies only to characters whose values are less
+than 256. PCRE does not support the notion of "case" for higher-valued
+characters.
+
+9. PCRE does not support the use of Unicode tables and properties or the Perl
+escapes \\p, \\P, and \\X.
+
+.SH AUTHOR
+.rs
+.sp
+Philip Hazel <ph10@cam.ac.uk>
+.br
+University Computing Service,
+.br
+Cambridge CB2 3QG, England.
+.br
+Phone: +44 1223 334714
+
+.in 0
+Last updated: 20 August 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcre.txt b/external-libs/pcre/doc/pcre.txt
new file mode 100644
index 00000000..698baa52
--- /dev/null
+++ b/external-libs/pcre/doc/pcre.txt
@@ -0,0 +1,3169 @@
+This file contains a concatenation of the PCRE man pages, converted to plain
+text format for ease of searching with a text editor, or for use on systems
+that do not have a man page processor. The small individual files that give
+synopses of each function in the library have not been included. There are
+separate text files for the pcregrep and pcretest commands.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+DESCRIPTION
+
+       The  PCRE  library is a set of functions that implement regular expres-
+       sion pattern matching using the same syntax and semantics as Perl, with
+       just  a  few  differences.  The current implementation of PCRE (release
+       4.x) corresponds approximately with Perl  5.8,  including  support  for
+       UTF-8  encoded  strings.   However,  this  support has to be explicitly
+       enabled; it is not the default.
+
+       PCRE is written in C and released as a C library. However, a number  of
+       people  have  written  wrappers  and interfaces of various kinds. A C++
+       class is included in these contributions, which can  be  found  in  the
+       Contrib directory at the primary FTP site, which is:
+
+       ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre
+
+       Details  of  exactly which Perl regular expression features are and are
+       not supported by PCRE are given in separate documents. See the pcrepat-
+       tern and pcrecompat pages.
+
+       Some  features  of  PCRE can be included, excluded, or changed when the
+       library is built. The pcre_config() function makes it  possible  for  a
+       client  to  discover  which features are available. Documentation about
+       building PCRE for various operating systems can be found in the  README
+       file in the source distribution.
+
+
+USER DOCUMENTATION
+
+       The user documentation for PCRE has been split up into a number of dif-
+       ferent sections. In the "man" format, each of these is a separate  "man
+       page".  In  the  HTML  format, each is a separate page, linked from the
+       index page. In the plain text format, all  the  sections  are  concate-
+       nated, for ease of searching. The sections are as follows:
+
+         pcre              this document
+         pcreapi           details of PCRE's native API
+         pcrebuild         options for building PCRE
+         pcrecallout       details of the callout feature
+         pcrecompat        discussion of Perl compatibility
+         pcregrep          description of the pcregrep command
+         pcrepattern       syntax and semantics of supported
+                             regular expressions
+         pcreperform       discussion of performance issues
+         pcreposix         the POSIX-compatible API
+         pcresample        discussion of the sample program
+         pcretest          the pcretest testing command
+
+       In  addition,  in the "man" and HTML formats, there is a short page for
+       each library function, listing its arguments and results.
+
+
+LIMITATIONS
+
+       There are some size limitations in PCRE but it is hoped that they  will
+       never in practice be relevant.
+
+       The  maximum  length of a compiled pattern is 65539 (sic) bytes if PCRE
+       is compiled with the default internal linkage size of 2. If you want to
+       process  regular  expressions  that are truly enormous, you can compile
+       PCRE with an internal linkage size of 3 or 4 (see the  README  file  in
+       the  source  distribution and the pcrebuild documentation for details).
+       If these cases the limit is substantially larger.  However,  the  speed
+       of execution will be slower.
+
+       All values in repeating quantifiers must be less than 65536.  The maxi-
+       mum number of capturing subpatterns is 65535.
+
+       There is no limit to the number of non-capturing subpatterns,  but  the
+       maximum  depth  of  nesting  of  all kinds of parenthesized subpattern,
+       including capturing subpatterns, assertions, and other types of subpat-
+       tern, is 200.
+
+       The  maximum  length of a subject string is the largest positive number
+       that an integer variable can hold. However, PCRE uses recursion to han-
+       dle  subpatterns  and indefinite repetition. This means that the avail-
+       able stack space may limit the size of a subject  string  that  can  be
+       processed by certain patterns.
+
+
+UTF-8 SUPPORT
+
+       Starting  at  release  3.3,  PCRE  has  had  some support for character
+       strings encoded in the UTF-8 format. For  release  4.0  this  has  been
+       greatly extended to cover most common requirements.
+
+       In  order  process  UTF-8 strings, you must build PCRE to include UTF-8
+       support in the code, and, in addition,  you  must  call  pcre_compile()
+       with  the PCRE_UTF8 option flag. When you do this, both the pattern and
+       any subject strings that are matched against it are  treated  as  UTF-8
+       strings instead of just strings of bytes.
+
+       If  you compile PCRE with UTF-8 support, but do not use it at run time,
+       the library will be a bit bigger, but the additional run time  overhead
+       is  limited  to testing the PCRE_UTF8 flag in several places, so should
+       not be very large.
+
+       The following comments apply when PCRE is running in UTF-8 mode:
+
+       1. When you set the PCRE_UTF8 flag, the strings passed as patterns  and
+       subjects  are  checked for validity on entry to the relevant functions.
+       If an invalid UTF-8 string is passed, an error return is given. In some
+       situations,  you  may  already  know  that  your strings are valid, and
+       therefore want to skip these checks in order to improve performance. If
+       you  set  the  PCRE_NO_UTF8_CHECK  flag at compile time or at run time,
+       PCRE assumes that the pattern or subject  it  is  given  (respectively)
+       contains  only valid UTF-8 codes. In this case, it does not diagnose an
+       invalid UTF-8 string. If you pass an invalid UTF-8 string to PCRE  when
+       PCRE_NO_UTF8_CHECK  is set, the results are undefined. Your program may
+       crash.
+
+       2. In a pattern, the escape sequence \x{...}, where the contents of the
+       braces  is  a  string  of hexadecimal digits, is interpreted as a UTF-8
+       character whose code number is the given hexadecimal number, for  exam-
+       ple:  \x{1234}.  If a non-hexadecimal digit appears between the braces,
+       the item is not recognized.  This escape sequence can be used either as
+       a literal, or within a character class.
+
+       3.  The  original hexadecimal escape sequence, \xhh, matches a two-byte
+       UTF-8 character if the value is greater than 127.
+
+       4. Repeat quantifiers apply to complete UTF-8 characters, not to  indi-
+       vidual bytes, for example: \x{100}{3}.
+
+       5.  The  dot  metacharacter  matches  one  UTF-8 character instead of a
+       single byte.
+
+       6. The escape sequence \C can be used to match a single byte  in  UTF-8
+       mode, but its use can lead to some strange effects.
+
+       7.  The  character escapes \b, \B, \d, \D, \s, \S, \w, and \W correctly
+       test characters of any code value, but the characters that PCRE  recog-
+       nizes  as  digits,  spaces,  or  word characters remain the same set as
+       before, all with values less than 256.
+
+       8. Case-insensitive matching applies only to  characters  whose  values
+       are  less  than  256.  PCRE  does  not support the notion of "case" for
+       higher-valued characters.
+
+       9. PCRE does not support the use of Unicode tables  and  properties  or
+       the Perl escapes \p, \P, and \X.
+
+
+AUTHOR
+
+       Philip Hazel <ph10@cam.ac.uk>
+       University Computing Service,
+       Cambridge CB2 3QG, England.
+       Phone: +44 1223 334714
+
+Last updated: 20 August 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+PCRE BUILD-TIME OPTIONS
+
+       This  document  describes  the  optional  features  of PCRE that can be
+       selected when the library is compiled. They are all selected, or  dese-
+       lected,  by  providing  options  to  the  configure script which is run
+       before the make command. The complete list  of  options  for  configure
+       (which  includes the standard ones such as the selection of the instal-
+       lation directory) can be obtained by running
+
+         ./configure --help
+
+       The following sections describe certain options whose names begin  with
+       --enable  or  --disable. These settings specify changes to the defaults
+       for the configure command. Because of the  way  that  configure  works,
+       --enable  and  --disable  always  come  in  pairs, so the complementary
+       option always exists as well, but as it specifies the  default,  it  is
+       not described.
+
+
+UTF-8 SUPPORT
+
+       To build PCRE with support for UTF-8 character strings, add
+
+         --enable-utf8
+
+       to  the  configure  command.  Of  itself, this does not make PCRE treat
+       strings as UTF-8. As well as compiling PCRE with this option, you  also
+       have  have to set the PCRE_UTF8 option when you call the pcre_compile()
+       function.
+
+
+CODE VALUE OF NEWLINE
+
+       By default, PCRE treats character 10 (linefeed) as the newline  charac-
+       ter. This is the normal newline character on Unix-like systems. You can
+       compile PCRE to use character 13 (carriage return) instead by adding
+
+         --enable-newline-is-cr
+
+       to the configure command. For completeness there is  also  a  --enable-
+       newline-is-lf  option,  which explicitly specifies linefeed as the new-
+       line character.
+
+
+BUILDING SHARED AND STATIC LIBRARIES
+
+       The PCRE building process uses libtool to build both shared and  static
+       Unix  libraries by default. You can suppress one of these by adding one
+       of
+
+         --disable-shared
+         --disable-static
+
+       to the configure command, as required.
+
+
+POSIX MALLOC USAGE
+
+       When PCRE is called through the  POSIX  interface  (see  the  pcreposix
+       documentation),  additional working storage is required for holding the
+       pointers to capturing substrings because PCRE requires  three  integers
+       per  substring,  whereas  the POSIX interface provides only two. If the
+       number of expected substrings is small, the wrapper function uses space
+       on the stack, because this is faster than using malloc() for each call.
+       The default threshold above which the stack is no longer used is 10; it
+       can be changed by adding a setting such as
+
+         --with-posix-malloc-threshold=20
+
+       to the configure command.
+
+
+LIMITING PCRE RESOURCE USAGE
+
+       Internally,  PCRE  has a function called match() which it calls repeat-
+       edly (possibly recursively) when performing a  matching  operation.  By
+       limiting  the  number of times this function may be called, a limit can
+       be placed on the resources used by a single call  to  pcre_exec().  The
+       limit  can be changed at run time, as described in the pcreapi documen-
+       tation. The default is 10 million, but this can be changed by adding  a
+       setting such as
+
+         --with-match-limit=500000
+
+       to the configure command.
+
+
+HANDLING VERY LARGE PATTERNS
+
+       Within  a  compiled  pattern,  offset values are used to point from one
+       part to another (for example, from an opening parenthesis to an  alter-
+       nation  metacharacter).  By  default two-byte values are used for these
+       offsets, leading to a maximum size for a  compiled  pattern  of  around
+       64K.  This  is sufficient to handle all but the most gigantic patterns.
+       Nevertheless, some people do want to process enormous patterns,  so  it
+       is  possible  to compile PCRE to use three-byte or four-byte offsets by
+       adding a setting such as
+
+         --with-link-size=3
+
+       to the configure command. The value given must be 2,  3,  or  4.  Using
+       longer  offsets slows down the operation of PCRE because it has to load
+       additional bytes when handling them.
+
+       If you build PCRE with an increased link size, test 2 (and  test  5  if
+       you  are using UTF-8) will fail. Part of the output of these tests is a
+       representation of the compiled pattern, and this changes with the  link
+       size.
+
+
+AVOIDING EXCESSIVE STACK USAGE
+
+       PCRE  implements  backtracking while matching by making recursive calls
+       to an internal function called match(). In environments where the  size
+       of the stack is limited, this can severely limit PCRE's operation. (The
+       Unix environment does not usually suffer from this problem.) An  alter-
+       native  approach  that  uses  memory  from  the  heap to remember data,
+       instead of using recursive function calls, has been implemented to work
+       round  this  problem. If you want to build a version of PCRE that works
+       this way, add
+
+         --disable-stack-for-recursion
+
+       to the configure command. With this configuration, PCRE  will  use  the
+       pcre_stack_malloc   and   pcre_stack_free   variables  to  call  memory
+       management functions. Separate functions are provided because the usage
+       is very predictable: the block sizes requested are always the same, and
+       the blocks are always freed in reverse order. A calling  program  might
+       be  able  to implement optimized functions that perform better than the
+       standard malloc() and  free()  functions.  PCRE  runs  noticeably  more
+       slowly when built in this way.
+
+
+USING EBCDIC CODE
+
+       PCRE  assumes  by  default that it will run in an environment where the
+       character code is ASCII (or UTF-8, which is a superset of ASCII).  PCRE
+       can, however, be compiled to run in an EBCDIC environment by adding
+
+         --enable-ebcdic
+
+       to the configure command.
+
+Last updated: 09 December 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+SYNOPSIS OF PCRE API
+
+       #include <pcre.h>
+
+       pcre *pcre_compile(const char *pattern, int options,
+            const char **errptr, int *erroffset,
+            const unsigned char *tableptr);
+
+       pcre_extra *pcre_study(const pcre *code, int options,
+            const char **errptr);
+
+       int pcre_exec(const pcre *code, const pcre_extra *extra,
+            const char *subject, int length, int startoffset,
+            int options, int *ovector, int ovecsize);
+
+       int pcre_copy_named_substring(const pcre *code,
+            const char *subject, int *ovector,
+            int stringcount, const char *stringname,
+            char *buffer, int buffersize);
+
+       int pcre_copy_substring(const char *subject, int *ovector,
+            int stringcount, int stringnumber, char *buffer,
+            int buffersize);
+
+       int pcre_get_named_substring(const pcre *code,
+            const char *subject, int *ovector,
+            int stringcount, const char *stringname,
+            const char **stringptr);
+
+       int pcre_get_stringnumber(const pcre *code,
+            const char *name);
+
+       int pcre_get_substring(const char *subject, int *ovector,
+            int stringcount, int stringnumber,
+            const char **stringptr);
+
+       int pcre_get_substring_list(const char *subject,
+            int *ovector, int stringcount, const char ***listptr);
+
+       void pcre_free_substring(const char *stringptr);
+
+       void pcre_free_substring_list(const char **stringptr);
+
+       const unsigned char *pcre_maketables(void);
+
+       int pcre_fullinfo(const pcre *code, const pcre_extra *extra,
+            int what, void *where);
+
+       int pcre_info(const pcre *code, int *optptr, int *firstcharptr);
+
+       int pcre_config(int what, void *where);
+
+       char *pcre_version(void);
+
+       void *(*pcre_malloc)(size_t);
+
+       void (*pcre_free)(void *);
+
+       void *(*pcre_stack_malloc)(size_t);
+
+       void (*pcre_stack_free)(void *);
+
+       int (*pcre_callout)(pcre_callout_block *);
+
+
+PCRE API
+
+       PCRE has its own native API, which is described in this document. There
+       is also a set of wrapper functions that correspond to the POSIX regular
+       expression API.  These are described in the pcreposix documentation.
+
+       The  native  API  function  prototypes  are  defined in the header file
+       pcre.h, and on Unix systems the library itself is called libpcre.a,  so
+       can be accessed by adding -lpcre to the command for linking an applica-
+       tion which calls it. The header file defines the macros PCRE_MAJOR  and
+       PCRE_MINOR  to  contain  the  major  and  minor release numbers for the
+       library. Applications can use these to include  support  for  different
+       releases.
+
+       The  functions  pcre_compile(),  pcre_study(), and pcre_exec() are used
+       for compiling and matching regular expressions. A sample  program  that
+       demonstrates  the simplest way of using them is given in the file pcre-
+       demo.c. The pcresample documentation describes how to run it.
+
+       There are convenience functions for extracting captured substrings from
+       a matched subject string. They are:
+
+         pcre_copy_substring()
+         pcre_copy_named_substring()
+         pcre_get_substring()
+         pcre_get_named_substring()
+         pcre_get_substring_list()
+
+       pcre_free_substring() and pcre_free_substring_list() are also provided,
+       to free the memory used for extracted strings.
+
+       The function pcre_maketables() is used (optionally) to build a  set  of
+       character tables in the current locale for passing to pcre_compile().
+
+       The  function  pcre_fullinfo()  is used to find out information about a
+       compiled pattern; pcre_info() is an obsolete version which returns only
+       some  of  the available information, but is retained for backwards com-
+       patibility.  The function pcre_version() returns a pointer to a  string
+       containing the version of PCRE and its date of release.
+
+       The  global  variables  pcre_malloc and pcre_free initially contain the
+       entry points of the standard  malloc()  and  free()  functions  respec-
+       tively. PCRE calls the memory management functions via these variables,
+       so a calling program can replace them if it  wishes  to  intercept  the
+       calls. This should be done before calling any PCRE functions.
+
+       The  global  variables  pcre_stack_malloc  and pcre_stack_free are also
+       indirections to memory management functions.  These  special  functions
+       are  used  only  when  PCRE is compiled to use the heap for remembering
+       data, instead of recursive function calls. This is a  non-standard  way
+       of  building  PCRE,  for  use in environments that have limited stacks.
+       Because of the greater use of memory management, it runs  more  slowly.
+       Separate  functions  are provided so that special-purpose external code
+       can be used for this case. When used, these functions are always called
+       in  a  stack-like  manner  (last obtained, first freed), and always for
+       memory blocks of the same size.
+
+       The global variable pcre_callout initially contains NULL. It can be set
+       by  the  caller  to  a "callout" function, which PCRE will then call at
+       specified points during a matching operation. Details are given in  the
+       pcrecallout documentation.
+
+
+MULTITHREADING
+
+       The  PCRE  functions  can be used in multi-threading applications, with
+       the  proviso  that  the  memory  management  functions  pointed  to  by
+       pcre_malloc, pcre_free, pcre_stack_malloc, and pcre_stack_free, and the
+       callout function pointed to by pcre_callout, are shared by all threads.
+
+       The  compiled form of a regular expression is not altered during match-
+       ing, so the same compiled pattern can safely be used by several threads
+       at once.
+
+
+CHECKING BUILD-TIME OPTIONS
+
+       int pcre_config(int what, void *where);
+
+       The  function pcre_config() makes it possible for a PCRE client to dis-
+       cover which optional features have been compiled into the PCRE library.
+       The  pcrebuild documentation has more details about these optional fea-
+       tures.
+
+       The first argument for pcre_config() is an  integer,  specifying  which
+       information is required; the second argument is a pointer to a variable
+       into which the information is  placed.  The  following  information  is
+       available:
+
+         PCRE_CONFIG_UTF8
+
+       The  output is an integer that is set to one if UTF-8 support is avail-
+       able; otherwise it is set to zero.
+
+         PCRE_CONFIG_NEWLINE
+
+       The output is an integer that is set to the value of the code  that  is
+       used  for the newline character. It is either linefeed (10) or carriage
+       return (13), and should normally be the  standard  character  for  your
+       operating system.
+
+         PCRE_CONFIG_LINK_SIZE
+
+       The  output  is  an  integer that contains the number of bytes used for
+       internal linkage in compiled regular expressions. The value is 2, 3, or
+       4.  Larger  values  allow larger regular expressions to be compiled, at
+       the expense of slower matching. The default value of  2  is  sufficient
+       for  all  but  the  most massive patterns, since it allows the compiled
+       pattern to be up to 64K in size.
+
+         PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+
+       The output is an integer that contains the threshold  above  which  the
+       POSIX  interface  uses malloc() for output vectors. Further details are
+       given in the pcreposix documentation.
+
+         PCRE_CONFIG_MATCH_LIMIT
+
+       The output is an integer that gives the default limit for the number of
+       internal  matching  function  calls in a pcre_exec() execution. Further
+       details are given with pcre_exec() below.
+
+         PCRE_CONFIG_STACKRECURSE
+
+       The output is an integer that is set to one if  internal  recursion  is
+       implemented  by recursive function calls that use the stack to remember
+       their state. This is the usual way that PCRE is compiled. The output is
+       zero  if PCRE was compiled to use blocks of data on the heap instead of
+       recursive  function  calls.  In  this   case,   pcre_stack_malloc   and
+       pcre_stack_free  are  called  to manage memory blocks on the heap, thus
+       avoiding the use of the stack.
+
+
+COMPILING A PATTERN
+
+       pcre *pcre_compile(const char *pattern, int options,
+            const char **errptr, int *erroffset,
+            const unsigned char *tableptr);
+
+
+       The function pcre_compile() is called to  compile  a  pattern  into  an
+       internal  form.  The pattern is a C string terminated by a binary zero,
+       and is passed in the argument pattern. A pointer to a single  block  of
+       memory  that is obtained via pcre_malloc is returned. This contains the
+       compiled code and related data.  The  pcre  type  is  defined  for  the
+       returned  block;  this  is a typedef for a structure whose contents are
+       not externally defined. It is up to the caller to free the memory  when
+       it is no longer required.
+
+       Although  the compiled code of a PCRE regex is relocatable, that is, it
+       does not depend on memory location, the complete pcre data block is not
+       fully relocatable, because it contains a copy of the tableptr argument,
+       which is an address (see below).
+
+       The options argument contains independent bits that affect the compila-
+       tion.  It  should  be  zero  if  no  options  are required. Some of the
+       options, in particular, those that are compatible with Perl,  can  also
+       be  set and unset from within the pattern (see the detailed description
+       of regular expressions in the  pcrepattern  documentation).  For  these
+       options,  the  contents of the options argument specifies their initial
+       settings at the start of compilation and execution.  The  PCRE_ANCHORED
+       option can be set at the time of matching as well as at compile time.
+
+       If errptr is NULL, pcre_compile() returns NULL immediately.  Otherwise,
+       if compilation of a pattern fails,  pcre_compile()  returns  NULL,  and
+       sets the variable pointed to by errptr to point to a textual error mes-
+       sage. The offset from the start of the pattern to the  character  where
+       the  error  was  discovered  is  placed  in  the variable pointed to by
+       erroffset, which must not be NULL. If it  is,  an  immediate  error  is
+       given.
+
+       If  the  final  argument, tableptr, is NULL, PCRE uses a default set of
+       character tables which are built when it is compiled, using the default
+       C  locale.  Otherwise,  tableptr  must  be  the  result  of  a  call to
+       pcre_maketables(). See the section on locale support below.
+
+       This code fragment shows a typical straightforward  call  to  pcre_com-
+       pile():
+
+         pcre *re;
+         const char *error;
+         int erroffset;
+         re = pcre_compile(
+           "^A.*Z",          /* the pattern */
+           0,                /* default options */
+           &error,           /* for error message */
+           &erroffset,       /* for error offset */
+           NULL);            /* use default character tables */
+
+       The following option bits are defined:
+
+         PCRE_ANCHORED
+
+       If this bit is set, the pattern is forced to be "anchored", that is, it
+       is constrained to match only at the first matching point in the  string
+       which is being searched (the "subject string"). This effect can also be
+       achieved by appropriate constructs in the pattern itself, which is  the
+       only way to do it in Perl.
+
+         PCRE_CASELESS
+
+       If  this  bit is set, letters in the pattern match both upper and lower
+       case letters. It is equivalent to Perl's  /i  option,  and  it  can  be
+       changed within a pattern by a (?i) option setting.
+
+         PCRE_DOLLAR_ENDONLY
+
+       If  this bit is set, a dollar metacharacter in the pattern matches only
+       at the end of the subject string. Without this option,  a  dollar  also
+       matches  immediately before the final character if it is a newline (but
+       not before any  other  newlines).  The  PCRE_DOLLAR_ENDONLY  option  is
+       ignored if PCRE_MULTILINE is set. There is no equivalent to this option
+       in Perl, and no way to set it within a pattern.
+
+         PCRE_DOTALL
+
+       If this bit is set, a dot metacharater in the pattern matches all char-
+       acters,  including  newlines.  Without  it, newlines are excluded. This
+       option is equivalent to Perl's /s option, and it can be changed  within
+       a  pattern  by  a  (?s)  option  setting. A negative class such as [^a]
+       always matches a newline character, independent of the setting of  this
+       option.
+
+         PCRE_EXTENDED
+
+       If  this  bit  is  set,  whitespace  data characters in the pattern are
+       totally ignored except  when  escaped  or  inside  a  character  class.
+       Whitespace  does  not  include the VT character (code 11). In addition,
+       characters between an unescaped # outside a  character  class  and  the
+       next newline character, inclusive, are also ignored. This is equivalent
+       to Perl's /x option, and it can be changed within a pattern by  a  (?x)
+       option setting.
+
+       This  option  makes  it possible to include comments inside complicated
+       patterns.  Note, however, that this applies only  to  data  characters.
+       Whitespace   characters  may  never  appear  within  special  character
+       sequences in a pattern, for  example  within  the  sequence  (?(  which
+       introduces a conditional subpattern.
+
+         PCRE_EXTRA
+
+       This  option  was invented in order to turn on additional functionality
+       of PCRE that is incompatible with Perl, but it  is  currently  of  very
+       little  use. When set, any backslash in a pattern that is followed by a
+       letter that has no special meaning  causes  an  error,  thus  reserving
+       these  combinations  for  future  expansion.  By default, as in Perl, a
+       backslash followed by a letter with no special meaning is treated as  a
+       literal.  There  are  at  present  no other features controlled by this
+       option. It can also be set by a (?X) option setting within a pattern.
+
+         PCRE_MULTILINE
+
+       By default, PCRE treats the subject string as consisting  of  a  single
+       "line"  of  characters (even if it actually contains several newlines).
+       The "start of line" metacharacter (^) matches only at the start of  the
+       string,  while  the "end of line" metacharacter ($) matches only at the
+       end of the string, or before a terminating  newline  (unless  PCRE_DOL-
+       LAR_ENDONLY is set). This is the same as Perl.
+
+       When  PCRE_MULTILINE  it  is set, the "start of line" and "end of line"
+       constructs match immediately following or immediately before  any  new-
+       line  in the subject string, respectively, as well as at the very start
+       and end. This is equivalent to Perl's /m option, and it can be  changed
+       within a pattern by a (?m) option setting. If there are no "\n" charac-
+       ters in a subject string, or no occurrences of ^ or  $  in  a  pattern,
+       setting PCRE_MULTILINE has no effect.
+
+         PCRE_NO_AUTO_CAPTURE
+
+       If this option is set, it disables the use of numbered capturing paren-
+       theses in the pattern. Any opening parenthesis that is not followed  by
+       ?  behaves as if it were followed by ?: but named parentheses can still
+       be used for capturing (and they acquire  numbers  in  the  usual  way).
+       There is no equivalent of this option in Perl.
+
+         PCRE_UNGREEDY
+
+       This  option  inverts  the "greediness" of the quantifiers so that they
+       are not greedy by default, but become greedy if followed by "?". It  is
+       not  compatible  with Perl. It can also be set by a (?U) option setting
+       within the pattern.
+
+         PCRE_UTF8
+
+       This option causes PCRE to regard both the pattern and the  subject  as
+       strings  of  UTF-8 characters instead of single-byte character strings.
+       However, it is available only if PCRE has been built to  include  UTF-8
+       support.  If  not, the use of this option provokes an error. Details of
+       how this option changes the behaviour of PCRE are given in the  section
+       on UTF-8 support in the main pcre page.
+
+         PCRE_NO_UTF8_CHECK
+
+       When PCRE_UTF8 is set, the validity of the pattern as a UTF-8 string is
+       automatically checked. If an invalid UTF-8 sequence of bytes is  found,
+       pcre_compile()  returns an error. If you already know that your pattern
+       is valid, and you want to skip this check for performance reasons,  you
+       can  set  the  PCRE_NO_UTF8_CHECK option. When it is set, the effect of
+       passing an invalid UTF-8 string as a pattern is undefined. It may cause
+       your  program  to  crash.  Note that there is a similar option for sup-
+       pressing the checking of subject strings passed to pcre_exec().
+
+
+
+STUDYING A PATTERN
+
+       pcre_extra *pcre_study(const pcre *code, int options,
+            const char **errptr);
+
+       When a pattern is going to be used several times, it is worth  spending
+       more  time  analyzing it in order to speed up the time taken for match-
+       ing. The function pcre_study() takes a pointer to a compiled pattern as
+       its first argument. If studing the pattern produces additional informa-
+       tion that will help speed up matching, pcre_study() returns  a  pointer
+       to  a  pcre_extra  block,  in  which the study_data field points to the
+       results of the study.
+
+       The returned value from  a  pcre_study()  can  be  passed  directly  to
+       pcre_exec().  However,  the pcre_extra block also contains other fields
+       that can be set by the caller before the block  is  passed;  these  are
+       described  below.  If  studying  the pattern does not produce any addi-
+       tional information, pcre_study() returns NULL. In that circumstance, if
+       the  calling  program  wants  to  pass  some  of  the  other  fields to
+       pcre_exec(), it must set up its own pcre_extra block.
+
+       The second argument contains option bits. At present,  no  options  are
+       defined for pcre_study(), and this argument should always be zero.
+
+       The  third argument for pcre_study() is a pointer for an error message.
+       If studying succeeds (even if no data is  returned),  the  variable  it
+       points  to  is set to NULL. Otherwise it points to a textual error mes-
+       sage. You should therefore test the error pointer for NULL after  call-
+       ing pcre_study(), to be sure that it has run successfully.
+
+       This is a typical call to pcre_study():
+
+         pcre_extra *pe;
+         pe = pcre_study(
+           re,             /* result of pcre_compile() */
+           0,              /* no options exist */
+           &error);        /* set to NULL or points to a message */
+
+       At present, studying a pattern is useful only for non-anchored patterns
+       that do not have a single fixed starting character. A bitmap of  possi-
+       ble starting characters is created.
+
+
+LOCALE SUPPORT
+
+       PCRE  handles  caseless matching, and determines whether characters are
+       letters, digits, or whatever, by reference to a  set  of  tables.  When
+       running  in UTF-8 mode, this applies only to characters with codes less
+       than 256. The library contains a default set of tables that is  created
+       in  the  default  C locale when PCRE is compiled. This is used when the
+       final argument of pcre_compile() is NULL, and is  sufficient  for  many
+       applications.
+
+       An alternative set of tables can, however, be supplied. Such tables are
+       built by calling the pcre_maketables() function,  which  has  no  argu-
+       ments,  in  the  relevant  locale.  The  result  can  then be passed to
+       pcre_compile() as often as necessary. For example,  to  build  and  use
+       tables that are appropriate for the French locale (where accented char-
+       acters with codes greater than 128 are treated as letters), the follow-
+       ing code could be used:
+
+         setlocale(LC_CTYPE, "fr");
+         tables = pcre_maketables();
+         re = pcre_compile(..., tables);
+
+       The  tables  are  built in memory that is obtained via pcre_malloc. The
+       pointer that is passed to pcre_compile is saved with the compiled  pat-
+       tern, and the same tables are used via this pointer by pcre_study() and
+       pcre_exec(). Thus, for any single pattern,  compilation,  studying  and
+       matching  all  happen in the same locale, but different patterns can be
+       compiled in different locales. It is  the  caller's  responsibility  to
+       ensure  that  the memory containing the tables remains available for as
+       long as it is needed.
+
+
+INFORMATION ABOUT A PATTERN
+
+       int pcre_fullinfo(const pcre *code, const pcre_extra *extra,
+            int what, void *where);
+
+       The pcre_fullinfo() function returns information about a compiled  pat-
+       tern. It replaces the obsolete pcre_info() function, which is neverthe-
+       less retained for backwards compability (and is documented below).
+
+       The first argument for pcre_fullinfo() is a  pointer  to  the  compiled
+       pattern.  The second argument is the result of pcre_study(), or NULL if
+       the pattern was not studied. The third argument specifies  which  piece
+       of  information  is required, and the fourth argument is a pointer to a
+       variable to receive the data. The yield of the  function  is  zero  for
+       success, or one of the following negative numbers:
+
+         PCRE_ERROR_NULL       the argument code was NULL
+                               the argument where was NULL
+         PCRE_ERROR_BADMAGIC   the "magic number" was not found
+         PCRE_ERROR_BADOPTION  the value of what was invalid
+
+       Here  is a typical call of pcre_fullinfo(), to obtain the length of the
+       compiled pattern:
+
+         int rc;
+         unsigned long int length;
+         rc = pcre_fullinfo(
+           re,               /* result of pcre_compile() */
+           pe,               /* result of pcre_study(), or NULL */
+           PCRE_INFO_SIZE,   /* what is required */
+           &length);         /* where to put the data */
+
+       The possible values for the third argument are defined in  pcre.h,  and
+       are as follows:
+
+         PCRE_INFO_BACKREFMAX
+
+       Return  the  number  of  the highest back reference in the pattern. The
+       fourth argument should point to an int variable. Zero  is  returned  if
+       there are no back references.
+
+         PCRE_INFO_CAPTURECOUNT
+
+       Return  the  number of capturing subpatterns in the pattern. The fourth
+       argument should point to an int variable.
+
+         PCRE_INFO_FIRSTBYTE
+
+       Return information about the first byte of any matched  string,  for  a
+       non-anchored    pattern.    (This    option    used    to   be   called
+       PCRE_INFO_FIRSTCHAR; the old name is  still  recognized  for  backwards
+       compatibility.)
+
+       If  there  is  a  fixed  first  byte,  e.g.  from  a  pattern  such  as
+       (cat|cow|coyote), it is returned in the integer pointed  to  by  where.
+       Otherwise, if either
+
+       (a)  the pattern was compiled with the PCRE_MULTILINE option, and every
+       branch starts with "^", or
+
+       (b) every branch of the pattern starts with ".*" and PCRE_DOTALL is not
+       set (if it were set, the pattern would be anchored),
+
+       -1  is  returned, indicating that the pattern matches only at the start
+       of a subject string or after any newline within the  string.  Otherwise
+       -2 is returned. For anchored patterns, -2 is returned.
+
+         PCRE_INFO_FIRSTTABLE
+
+       If  the pattern was studied, and this resulted in the construction of a
+       256-bit table indicating a fixed set of bytes for the first byte in any
+       matching  string, a pointer to the table is returned. Otherwise NULL is
+       returned. The fourth argument should point to an unsigned char *  vari-
+       able.
+
+         PCRE_INFO_LASTLITERAL
+
+       Return  the  value of the rightmost literal byte that must exist in any
+       matched string, other than at its  start,  if  such  a  byte  has  been
+       recorded. The fourth argument should point to an int variable. If there
+       is no such byte, -1 is returned. For anchored patterns, a last  literal
+       byte  is  recorded only if it follows something of variable length. For
+       example, for the pattern /^a\d+z\d+/ the returned value is "z", but for
+       /^a\dz\d/ the returned value is -1.
+
+         PCRE_INFO_NAMECOUNT
+         PCRE_INFO_NAMEENTRYSIZE
+         PCRE_INFO_NAMETABLE
+
+       PCRE  supports the use of named as well as numbered capturing parenthe-
+       ses. The names are just an additional way of identifying the  parenthe-
+       ses,  which still acquire a number. A caller that wants to extract data
+       from a named subpattern must convert the name to a number in  order  to
+       access  the  correct  pointers  in  the  output  vector (described with
+       pcre_exec() below). In order to do this, it must first use these  three
+       values to obtain the name-to-number mapping table for the pattern.
+
+       The map consists of a number of fixed-size entries. PCRE_INFO_NAMECOUNT
+       gives the number of entries, and PCRE_INFO_NAMEENTRYSIZE gives the size
+       of  each  entry;  both  of  these  return  an int value. The entry size
+       depends on the length of the longest name. PCRE_INFO_NAMETABLE  returns
+       a  pointer  to  the  first  entry of the table (a pointer to char). The
+       first two bytes of each entry are the number of the capturing parenthe-
+       sis,  most  significant byte first. The rest of the entry is the corre-
+       sponding name, zero terminated. The names are  in  alphabetical  order.
+       For  example,  consider  the following pattern (assume PCRE_EXTENDED is
+       set, so white space - including newlines - is ignored):
+
+         (?P<date> (?P<year>(\d\d)?\d\d) -
+         (?P<month>\d\d) - (?P<day>\d\d) )
+
+       There are four named subpatterns, so the table has  four  entries,  and
+       each  entry  in the table is eight bytes long. The table is as follows,
+       with non-printing bytes shows in hex, and undefined bytes shown as ??:
+
+         00 01 d  a  t  e  00 ??
+         00 05 d  a  y  00 ?? ??
+         00 04 m  o  n  t  h  00
+         00 02 y  e  a  r  00 ??
+
+       When writing code to extract data from named subpatterns, remember that
+       the length of each entry may be different for each compiled pattern.
+
+         PCRE_INFO_OPTIONS
+
+       Return  a  copy of the options with which the pattern was compiled. The
+       fourth argument should point to an unsigned long  int  variable.  These
+       option bits are those specified in the call to pcre_compile(), modified
+       by any top-level option settings within the pattern itself.
+
+       A pattern is automatically anchored by PCRE if  all  of  its  top-level
+       alternatives begin with one of the following:
+
+         ^     unless PCRE_MULTILINE is set
+         \A    always
+         \G    always
+         .*    if PCRE_DOTALL is set and there are no back
+                 references to the subpattern in which .* appears
+
+       For such patterns, the PCRE_ANCHORED bit is set in the options returned
+       by pcre_fullinfo().
+
+         PCRE_INFO_SIZE
+
+       Return the size of the compiled pattern, that is, the  value  that  was
+       passed as the argument to pcre_malloc() when PCRE was getting memory in
+       which to place the compiled data. The fourth argument should point to a
+       size_t variable.
+
+         PCRE_INFO_STUDYSIZE
+
+       Returns  the  size of the data block pointed to by the study_data field
+       in a pcre_extra block. That is, it is the  value  that  was  passed  to
+       pcre_malloc() when PCRE was getting memory into which to place the data
+       created by pcre_study(). The fourth argument should point to  a  size_t
+       variable.
+
+
+OBSOLETE INFO FUNCTION
+
+       int pcre_info(const pcre *code, int *optptr, int *firstcharptr);
+
+       The  pcre_info()  function is now obsolete because its interface is too
+       restrictive to return all the available data about a compiled  pattern.
+       New   programs   should  use  pcre_fullinfo()  instead.  The  yield  of
+       pcre_info() is the number of capturing subpatterns, or one of the  fol-
+       lowing negative numbers:
+
+         PCRE_ERROR_NULL       the argument code was NULL
+         PCRE_ERROR_BADMAGIC   the "magic number" was not found
+
+       If  the  optptr  argument is not NULL, a copy of the options with which
+       the pattern was compiled is placed in the integer  it  points  to  (see
+       PCRE_INFO_OPTIONS above).
+
+       If  the  pattern  is  not anchored and the firstcharptr argument is not
+       NULL, it is used to pass back information about the first character  of
+       any matched string (see PCRE_INFO_FIRSTBYTE above).
+
+
+MATCHING A PATTERN
+
+       int pcre_exec(const pcre *code, const pcre_extra *extra,
+            const char *subject, int length, int startoffset,
+            int options, int *ovector, int ovecsize);
+
+       The  function pcre_exec() is called to match a subject string against a
+       pre-compiled pattern, which is passed in the code argument. If the pat-
+       tern  has been studied, the result of the study should be passed in the
+       extra argument.
+
+       Here is an example of a simple call to pcre_exec():
+
+         int rc;
+         int ovector[30];
+         rc = pcre_exec(
+           re,             /* result of pcre_compile() */
+           NULL,           /* we didn't study the pattern */
+           "some string",  /* the subject string */
+           11,             /* the length of the subject string */
+           0,              /* start at offset 0 in the subject */
+           0,              /* default options */
+           ovector,        /* vector for substring information */
+           30);            /* number of elements in the vector */
+
+       If the extra argument is not NULL, it must point to a  pcre_extra  data
+       block.  The pcre_study() function returns such a block (when it doesn't
+       return NULL), but you can also create one for yourself, and pass  addi-
+       tional information in it. The fields in the block are as follows:
+
+         unsigned long int flags;
+         void *study_data;
+         unsigned long int match_limit;
+         void *callout_data;
+
+       The  flags  field  is a bitmap that specifies which of the other fields
+       are set. The flag bits are:
+
+         PCRE_EXTRA_STUDY_DATA
+         PCRE_EXTRA_MATCH_LIMIT
+         PCRE_EXTRA_CALLOUT_DATA
+
+       Other flag bits should be set to zero. The study_data field is  set  in
+       the  pcre_extra  block  that is returned by pcre_study(), together with
+       the appropriate flag bit. You should not set this yourself, but you can
+       add to the block by setting the other fields.
+
+       The match_limit field provides a means of preventing PCRE from using up
+       a vast amount of resources when running patterns that are not going  to
+       match,  but  which  have  a very large number of possibilities in their
+       search trees. The classic  example  is  the  use  of  nested  unlimited
+       repeats. Internally, PCRE uses a function called match() which it calls
+       repeatedly (sometimes recursively). The limit is imposed on the  number
+       of  times  this function is called during a match, which has the effect
+       of limiting the amount of recursion  and  backtracking  that  can  take
+       place.  For  patterns that are not anchored, the count starts from zero
+       for each position in the subject string.
+
+       The default limit for the library can be set when PCRE  is  built;  the
+       default  default  is 10 million, which handles all but the most extreme
+       cases. You can reduce  the  default  by  suppling  pcre_exec()  with  a
+       pcre_extra  block  in  which match_limit is set to a smaller value, and
+       PCRE_EXTRA_MATCH_LIMIT is set in the  flags  field.  If  the  limit  is
+       exceeded, pcre_exec() returns PCRE_ERROR_MATCHLIMIT.
+
+       The  pcre_callout  field is used in conjunction with the "callout" fea-
+       ture, which is described in the pcrecallout documentation.
+
+       The PCRE_ANCHORED option can be passed in the options  argument,  whose
+       unused  bits  must  be zero. This limits pcre_exec() to matching at the
+       first matching position.  However,  if  a  pattern  was  compiled  with
+       PCRE_ANCHORED,  or turned out to be anchored by virtue of its contents,
+       it cannot be made unachored at matching time.
+
+       When PCRE_UTF8 was set at compile time, the validity of the subject  as
+       a  UTF-8  string is automatically checked, and the value of startoffset
+       is also checked to ensure that it points to the start of a UTF-8  char-
+       acter.  If  an  invalid  UTF-8  sequence of bytes is found, pcre_exec()
+       returns  the  error  PCRE_ERROR_BADUTF8.  If  startoffset  contains  an
+       invalid value, PCRE_ERROR_BADUTF8_OFFSET is returned.
+
+       If  you  already  know that your subject is valid, and you want to skip
+       these   checks   for   performance   reasons,   you   can    set    the
+       PCRE_NO_UTF8_CHECK  option  when calling pcre_exec(). You might want to
+       do this for the second and subsequent calls to pcre_exec() if  you  are
+       making  repeated  calls  to  find  all  the matches in a single subject
+       string. However, you should be  sure  that  the  value  of  startoffset
+       points  to  the  start of a UTF-8 character. When PCRE_NO_UTF8_CHECK is
+       set, the effect of passing an invalid UTF-8 string as a subject,  or  a
+       value  of startoffset that does not point to the start of a UTF-8 char-
+       acter, is undefined. Your program may crash.
+
+       There are also three further options that can be set only  at  matching
+       time:
+
+         PCRE_NOTBOL
+
+       The  first  character  of the string is not the beginning of a line, so
+       the circumflex metacharacter should not match before it.  Setting  this
+       without  PCRE_MULTILINE  (at  compile  time) causes circumflex never to
+       match.
+
+         PCRE_NOTEOL
+
+       The end of the string is not the end of a line, so the dollar metachar-
+       acter  should  not  match  it  nor (except in multiline mode) a newline
+       immediately before it. Setting this without PCRE_MULTILINE (at  compile
+       time) causes dollar never to match.
+
+         PCRE_NOTEMPTY
+
+       An empty string is not considered to be a valid match if this option is
+       set. If there are alternatives in the pattern, they are tried.  If  all
+       the  alternatives  match  the empty string, the entire match fails. For
+       example, if the pattern
+
+         a?b?
+
+       is applied to a string not beginning with "a" or "b",  it  matches  the
+       empty  string at the start of the subject. With PCRE_NOTEMPTY set, this
+       match is not valid, so PCRE searches further into the string for occur-
+       rences of "a" or "b".
+
+       Perl has no direct equivalent of PCRE_NOTEMPTY, but it does make a spe-
+       cial case of a pattern match of the empty  string  within  its  split()
+       function,  and  when  using  the /g modifier. It is possible to emulate
+       Perl's behaviour after matching a null string by first trying the match
+       again at the same offset with PCRE_NOTEMPTY set, and then if that fails
+       by advancing the starting offset (see below)  and  trying  an  ordinary
+       match again.
+
+       The  subject string is passed to pcre_exec() as a pointer in subject, a
+       length in length, and a starting byte offset in startoffset. Unlike the
+       pattern  string,  the  subject  may contain binary zero bytes. When the
+       starting offset is zero, the search for a match starts at the beginning
+       of the subject, and this is by far the most common case.
+
+       If the pattern was compiled with the PCRE_UTF8 option, the subject must
+       be a sequence of bytes that is a valid UTF-8 string, and  the  starting
+       offset  must point to the beginning of a UTF-8 character. If an invalid
+       UTF-8 string or offset is passed, an error  (either  PCRE_ERROR_BADUTF8
+       or   PCRE_ERROR_BADUTF8_OFFSET)   is   returned,   unless   the  option
+       PCRE_NO_UTF8_CHECK is set,  in  which  case  PCRE's  behaviour  is  not
+       defined.
+
+       A  non-zero  starting offset is useful when searching for another match
+       in the same subject by calling pcre_exec() again after a previous  suc-
+       cess.   Setting  startoffset differs from just passing over a shortened
+       string and setting PCRE_NOTBOL in the case of  a  pattern  that  begins
+       with any kind of lookbehind. For example, consider the pattern
+
+         \Biss\B
+
+       which  finds  occurrences  of "iss" in the middle of words. (\B matches
+       only if the current position in the subject is not  a  word  boundary.)
+       When  applied  to the string "Mississipi" the first call to pcre_exec()
+       finds the first occurrence. If pcre_exec() is called  again  with  just
+       the  remainder  of  the  subject,  namely  "issipi", it does not match,
+       because \B is always false at the start of the subject, which is deemed
+       to  be  a  word  boundary. However, if pcre_exec() is passed the entire
+       string again, but with startoffset  set  to  4,  it  finds  the  second
+       occurrence  of  "iss"  because  it  is able to look behind the starting
+       point to discover that it is preceded by a letter.
+
+       If a non-zero starting offset is passed when the pattern  is  anchored,
+       one  attempt  to match at the given offset is tried. This can only suc-
+       ceed if the pattern does not require the match to be at  the  start  of
+       the subject.
+
+       In  general, a pattern matches a certain portion of the subject, and in
+       addition, further substrings from the subject  may  be  picked  out  by
+       parts  of  the  pattern.  Following the usage in Jeffrey Friedl's book,
+       this is called "capturing" in what follows, and the  phrase  "capturing
+       subpattern"  is  used for a fragment of a pattern that picks out a sub-
+       string. PCRE supports several other kinds of  parenthesized  subpattern
+       that do not cause substrings to be captured.
+
+       Captured  substrings are returned to the caller via a vector of integer
+       offsets whose address is passed in ovector. The number of  elements  in
+       the vector is passed in ovecsize. The first two-thirds of the vector is
+       used to pass back captured substrings, each substring using a  pair  of
+       integers.  The  remaining  third  of the vector is used as workspace by
+       pcre_exec() while matching capturing subpatterns, and is not  available
+       for  passing  back  information.  The  length passed in ovecsize should
+       always be a multiple of three. If it is not, it is rounded down.
+
+       When a match has been successful, information about captured substrings
+       is returned in pairs of integers, starting at the beginning of ovector,
+       and continuing up to two-thirds of its length at the  most.  The  first
+       element of a pair is set to the offset of the first character in a sub-
+       string, and the second is set to the  offset  of  the  first  character
+       after  the  end  of  a  substring. The first pair, ovector[0] and ovec-
+       tor[1], identify the portion of  the  subject  string  matched  by  the
+       entire  pattern.  The next pair is used for the first capturing subpat-
+       tern, and so on. The value returned by pcre_exec()  is  the  number  of
+       pairs  that  have  been set. If there are no capturing subpatterns, the
+       return value from a successful match is 1,  indicating  that  just  the
+       first pair of offsets has been set.
+
+       Some  convenience  functions  are  provided for extracting the captured
+       substrings as separate strings. These are described  in  the  following
+       section.
+
+       It  is  possible  for  an capturing subpattern number n+1 to match some
+       part of the subject when subpattern n has not been  used  at  all.  For
+       example, if the string "abc" is matched against the pattern (a|(z))(bc)
+       subpatterns 1 and 3 are matched, but 2 is not. When this happens,  both
+       offset values corresponding to the unused subpattern are set to -1.
+
+       If a capturing subpattern is matched repeatedly, it is the last portion
+       of the string that it matched that gets returned.
+
+       If the vector is too small to hold all the captured substrings,  it  is
+       used as far as possible (up to two-thirds of its length), and the func-
+       tion returns a value of zero. In particular, if the  substring  offsets
+       are  not  of interest, pcre_exec() may be called with ovector passed as
+       NULL and ovecsize as zero. However, if the pattern contains back refer-
+       ences  and  the  ovector  isn't big enough to remember the related sub-
+       strings, PCRE has to get additional memory  for  use  during  matching.
+       Thus it is usually advisable to supply an ovector.
+
+       Note  that  pcre_info() can be used to find out how many capturing sub-
+       patterns there are in a compiled pattern. The smallest size for ovector
+       that  will  allow for n captured substrings, in addition to the offsets
+       of the substring matched by the whole pattern, is (n+1)*3.
+
+       If pcre_exec() fails, it returns a negative number. The  following  are
+       defined in the header file:
+
+         PCRE_ERROR_NOMATCH        (-1)
+
+       The subject string did not match the pattern.
+
+         PCRE_ERROR_NULL           (-2)
+
+       Either  code  or  subject  was  passed as NULL, or ovector was NULL and
+       ovecsize was not zero.
+
+         PCRE_ERROR_BADOPTION      (-3)
+
+       An unrecognized bit was set in the options argument.
+
+         PCRE_ERROR_BADMAGIC       (-4)
+
+       PCRE stores a 4-byte "magic number" at the start of the compiled  code,
+       to  catch  the case when it is passed a junk pointer. This is the error
+       it gives when the magic number isn't present.
+
+         PCRE_ERROR_UNKNOWN_NODE   (-5)
+
+       While running the pattern match, an unknown item was encountered in the
+       compiled  pattern.  This  error  could be caused by a bug in PCRE or by
+       overwriting of the compiled pattern.
+
+         PCRE_ERROR_NOMEMORY       (-6)
+
+       If a pattern contains back references, but the ovector that  is  passed
+       to pcre_exec() is not big enough to remember the referenced substrings,
+       PCRE gets a block of memory at the start of matching to  use  for  this
+       purpose.  If the call via pcre_malloc() fails, this error is given. The
+       memory is freed at the end of matching.
+
+         PCRE_ERROR_NOSUBSTRING    (-7)
+
+       This error is used by the pcre_copy_substring(),  pcre_get_substring(),
+       and  pcre_get_substring_list()  functions  (see  below).  It  is  never
+       returned by pcre_exec().
+
+         PCRE_ERROR_MATCHLIMIT     (-8)
+
+       The recursion and backtracking limit, as specified by  the  match_limit
+       field  in  a  pcre_extra  structure (or defaulted) was reached. See the
+       description above.
+
+         PCRE_ERROR_CALLOUT        (-9)
+
+       This error is never generated by pcre_exec() itself. It is provided for
+       use  by  callout functions that want to yield a distinctive error code.
+       See the pcrecallout documentation for details.
+
+         PCRE_ERROR_BADUTF8        (-10)
+
+       A string that contains an invalid UTF-8 byte sequence was passed  as  a
+       subject.
+
+         PCRE_ERROR_BADUTF8_OFFSET (-11)
+
+       The UTF-8 byte sequence that was passed as a subject was valid, but the
+       value of startoffset did not point to the beginning of a UTF-8  charac-
+       ter.
+
+
+EXTRACTING CAPTURED SUBSTRINGS BY NUMBER
+
+       int pcre_copy_substring(const char *subject, int *ovector,
+            int stringcount, int stringnumber, char *buffer,
+            int buffersize);
+
+       int pcre_get_substring(const char *subject, int *ovector,
+            int stringcount, int stringnumber,
+            const char **stringptr);
+
+       int pcre_get_substring_list(const char *subject,
+            int *ovector, int stringcount, const char ***listptr);
+
+       Captured  substrings  can  be  accessed  directly  by using the offsets
+       returned by pcre_exec() in  ovector.  For  convenience,  the  functions
+       pcre_copy_substring(),    pcre_get_substring(),    and    pcre_get_sub-
+       string_list() are provided for extracting captured substrings  as  new,
+       separate,  zero-terminated strings. These functions identify substrings
+       by number. The next section describes functions  for  extracting  named
+       substrings.  A  substring  that  contains  a  binary  zero is correctly
+       extracted and has a further zero added on the end, but  the  result  is
+       not, of course, a C string.
+
+       The  first  three  arguments  are the same for all three of these func-
+       tions: subject is the subject string which has just  been  successfully
+       matched, ovector is a pointer to the vector of integer offsets that was
+       passed to pcre_exec(), and stringcount is the number of substrings that
+       were  captured  by  the match, including the substring that matched the
+       entire regular expression. This is the value returned by  pcre_exec  if
+       it  is greater than zero. If pcre_exec() returned zero, indicating that
+       it ran out of space in ovector, the value passed as stringcount  should
+       be the size of the vector divided by three.
+
+       The  functions pcre_copy_substring() and pcre_get_substring() extract a
+       single substring, whose number is given as  stringnumber.  A  value  of
+       zero  extracts  the  substring  that  matched the entire pattern, while
+       higher values  extract  the  captured  substrings.  For  pcre_copy_sub-
+       string(),  the  string  is  placed  in buffer, whose length is given by
+       buffersize, while for pcre_get_substring() a new  block  of  memory  is
+       obtained  via  pcre_malloc,  and its address is returned via stringptr.
+       The yield of the function is the length of the  string,  not  including
+       the terminating zero, or one of
+
+         PCRE_ERROR_NOMEMORY       (-6)
+
+       The  buffer  was too small for pcre_copy_substring(), or the attempt to
+       get memory failed for pcre_get_substring().
+
+         PCRE_ERROR_NOSUBSTRING    (-7)
+
+       There is no substring whose number is stringnumber.
+
+       The pcre_get_substring_list()  function  extracts  all  available  sub-
+       strings  and  builds  a list of pointers to them. All this is done in a
+       single block of memory which is obtained via pcre_malloc.  The  address
+       of the memory block is returned via listptr, which is also the start of
+       the list of string pointers. The end of the list is marked  by  a  NULL
+       pointer. The yield of the function is zero if all went well, or
+
+         PCRE_ERROR_NOMEMORY       (-6)
+
+       if the attempt to get the memory block failed.
+
+       When  any of these functions encounter a substring that is unset, which
+       can happen when capturing subpattern number n+1 matches  some  part  of
+       the  subject, but subpattern n has not been used at all, they return an
+       empty string. This can be distinguished from a genuine zero-length sub-
+       string  by inspecting the appropriate offset in ovector, which is nega-
+       tive for unset substrings.
+
+       The    two    convenience    functions    pcre_free_substring()     and
+       pcre_free_substring_list() can be used to free the memory returned by a
+       previous call  of  pcre_get_substring()  or  pcre_get_substring_list(),
+       respectively. They do nothing more than call the function pointed to by
+       pcre_free, which of course could be called directly from a  C  program.
+       However,  PCRE is used in some situations where it is linked via a spe-
+       cial  interface  to  another  programming  language  which  cannot  use
+       pcre_free  directly;  it is for these cases that the functions are pro-
+       vided.
+
+
+EXTRACTING CAPTURED SUBSTRINGS BY NAME
+
+       int pcre_copy_named_substring(const pcre *code,
+            const char *subject, int *ovector,
+            int stringcount, const char *stringname,
+            char *buffer, int buffersize);
+
+       int pcre_get_stringnumber(const pcre *code,
+            const char *name);
+
+       int pcre_get_named_substring(const pcre *code,
+            const char *subject, int *ovector,
+            int stringcount, const char *stringname,
+            const char **stringptr);
+
+       To extract a substring by name, you first have to find associated  num-
+       ber.  This  can  be  done by calling pcre_get_stringnumber(). The first
+       argument is the compiled pattern, and the second is the name. For exam-
+       ple, for this pattern
+
+         ab(?<xxx>\d+)...
+
+       the  number  of the subpattern called "xxx" is 1. Given the number, you
+       can then extract the substring directly, or use one  of  the  functions
+       described  in the previous section. For convenience, there are also two
+       functions that do the whole job.
+
+       Most   of   the   arguments    of    pcre_copy_named_substring()    and
+       pcre_get_named_substring() are the same as those for the functions that
+       extract by number, and so are not re-described here. There are just two
+       differences.
+
+       First,  instead  of a substring number, a substring name is given. Sec-
+       ond, there is an extra argument, given at the start, which is a pointer
+       to  the compiled pattern. This is needed in order to gain access to the
+       name-to-number translation table.
+
+       These functions call pcre_get_stringnumber(), and if it succeeds,  they
+       then  call  pcre_copy_substring() or pcre_get_substring(), as appropri-
+       ate.
+
+Last updated: 09 December 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+PCRE CALLOUTS
+
+       int (*pcre_callout)(pcre_callout_block *);
+
+       PCRE provides a feature called "callout", which is a means of temporar-
+       ily passing control to the caller of PCRE  in  the  middle  of  pattern
+       matching.  The  caller of PCRE provides an external function by putting
+       its entry point in the global variable pcre_callout. By  default,  this
+       variable contains NULL, which disables all calling out.
+
+       Within  a  regular  expression,  (?C) indicates the points at which the
+       external function is to be called.  Different  callout  points  can  be
+       identified  by  putting  a number less than 256 after the letter C. The
+       default value is zero.  For  example,  this  pattern  has  two  callout
+       points:
+
+         (?C1)abc(?C2)def
+
+       During matching, when PCRE reaches a callout point (and pcre_callout is
+       set), the external function is called. Its only argument is  a  pointer
+       to a pcre_callout block. This contains the following variables:
+
+         int          version;
+         int          callout_number;
+         int         *offset_vector;
+         const char  *subject;
+         int          subject_length;
+         int          start_match;
+         int          current_position;
+         int          capture_top;
+         int          capture_last;
+         void        *callout_data;
+
+       The  version  field  is an integer containing the version number of the
+       block format. The current version  is  zero.  The  version  number  may
+       change  in  future if additional fields are added, but the intention is
+       never to remove any of the existing fields.
+
+       The callout_number field contains the number of the  callout,  as  com-
+       piled into the pattern (that is, the number after ?C).
+
+       The  offset_vector field is a pointer to the vector of offsets that was
+       passed by the caller to pcre_exec(). The contents can be  inspected  in
+       order  to extract substrings that have been matched so far, in the same
+       way as for extracting substrings after a match has completed.
+
+       The subject and subject_length fields contain copies  the  values  that
+       were passed to pcre_exec().
+
+       The  start_match  field contains the offset within the subject at which
+       the current match attempt started. If the pattern is not anchored,  the
+       callout  function  may  be  called several times for different starting
+       points.
+
+       The current_position field contains the offset within  the  subject  of
+       the current match pointer.
+
+       The  capture_top field contains one more than the number of the highest
+       numbered  captured  substring  so  far.  If  no  substrings  have  been
+       captured, the value of capture_top is one.
+
+       The  capture_last  field  contains the number of the most recently cap-
+       tured substring.
+
+       The callout_data field contains a value that is passed  to  pcre_exec()
+       by  the  caller specifically so that it can be passed back in callouts.
+       It is passed in the pcre_callout field of the  pcre_extra  data  struc-
+       ture.  If  no  such  data  was  passed,  the value of callout_data in a
+       pcre_callout block is NULL. There is a description  of  the  pcre_extra
+       structure in the pcreapi documentation.
+
+
+
+RETURN VALUES
+
+       The callout function returns an integer. If the value is zero, matching
+       proceeds as normal. If the value is greater than zero,  matching  fails
+       at the current point, but backtracking to test other possibilities goes
+       ahead, just as if a lookahead assertion had failed.  If  the  value  is
+       less  than  zero,  the  match is abandoned, and pcre_exec() returns the
+       value.
+
+       Negative  values  should  normally  be   chosen   from   the   set   of
+       PCRE_ERROR_xxx values. In particular, PCRE_ERROR_NOMATCH forces a stan-
+       dard "no  match"  failure.   The  error  number  PCRE_ERROR_CALLOUT  is
+       reserved  for  use  by callout functions; it will never be used by PCRE
+       itself.
+
+Last updated: 21 January 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+DIFFERENCES FROM PERL
+
+       This  document describes the differences in the ways that PCRE and Perl
+       handle regular expressions. The differences  described  here  are  with
+       respect to Perl 5.8.
+
+       1.  PCRE does not have full UTF-8 support. Details of what it does have
+       are given in the section on UTF-8 support in the main pcre page.
+
+       2. PCRE does not allow repeat quantifiers on lookahead assertions. Perl
+       permits  them,  but they do not mean what you might think. For example,
+       (?!a){3} does not assert that the next three characters are not "a". It
+       just asserts that the next character is not "a" three times.
+
+       3.  Capturing  subpatterns  that occur inside negative lookahead asser-
+       tions are counted, but their entries in the offsets  vector  are  never
+       set.  Perl sets its numerical variables from any such patterns that are
+       matched before the assertion fails to match something (thereby succeed-
+       ing),  but  only  if the negative lookahead assertion contains just one
+       branch.
+
+       4. Though binary zero characters are supported in the  subject  string,
+       they are not allowed in a pattern string because it is passed as a nor-
+       mal C string, terminated by zero. The escape sequence "\0" can be  used
+       in the pattern to represent a binary zero.
+
+       5.  The  following Perl escape sequences are not supported: \l, \u, \L,
+       \U, \P, \p, \N, and \X. In fact these are implemented by Perl's general
+       string-handling and are not part of its pattern matching engine. If any
+       of these are encountered by PCRE, an error is generated.
+
+       6. PCRE does support the \Q...\E escape for quoting substrings. Charac-
+       ters  in  between  are  treated as literals. This is slightly different
+       from Perl in that $ and @ are  also  handled  as  literals  inside  the
+       quotes.  In Perl, they cause variable interpolation (but of course PCRE
+       does not have variables). Note the following examples:
+
+           Pattern            PCRE matches      Perl matches
+
+           \Qabc$xyz\E        abc$xyz           abc followed by the
+                                                  contents of $xyz
+           \Qabc\$xyz\E       abc\$xyz          abc\$xyz
+           \Qabc\E\$\Qxyz\E   abc$xyz           abc$xyz
+
+       The \Q...\E sequence is recognized both inside  and  outside  character
+       classes.
+
+       7. Fairly obviously, PCRE does not support the (?{code}) and (?p{code})
+       constructions. However, there is some experimental support  for  recur-
+       sive  patterns  using the non-Perl items (?R), (?number) and (?P>name).
+       Also, the PCRE "callout" feature allows  an  external  function  to  be
+       called during pattern matching.
+
+       8.  There  are some differences that are concerned with the settings of
+       captured strings when part of  a  pattern  is  repeated.  For  example,
+       matching  "aba"  against  the  pattern  /^(a(b)?)+$/  in Perl leaves $2
+       unset, but in PCRE it is set to "b".
+
+       9. PCRE  provides  some  extensions  to  the  Perl  regular  expression
+       facilities:
+
+       (a)  Although  lookbehind  assertions  must match fixed length strings,
+       each alternative branch of a lookbehind assertion can match a different
+       length of string. Perl requires them all to have the same length.
+
+       (b)  If PCRE_DOLLAR_ENDONLY is set and PCRE_MULTILINE is not set, the $
+       meta-character matches only at the very end of the string.
+
+       (c) If PCRE_EXTRA is set, a backslash followed by a letter with no spe-
+       cial meaning is faulted.
+
+       (d)  If  PCRE_UNGREEDY is set, the greediness of the repetition quanti-
+       fiers is inverted, that is, by default they are not greedy, but if fol-
+       lowed by a question mark they are.
+
+       (e)  PCRE_ANCHORED  can  be used to force a pattern to be tried only at
+       the first matching position in the subject string.
+
+       (f) The PCRE_NOTBOL, PCRE_NOTEOL, PCRE_NOTEMPTY, and  PCRE_NO_AUTO_CAP-
+       TURE options for pcre_exec() have no Perl equivalents.
+
+       (g)  The (?R), (?number), and (?P>name) constructs allows for recursive
+       pattern matching (Perl can do  this  using  the  (?p{code})  construct,
+       which PCRE cannot support.)
+
+       (h)  PCRE supports named capturing substrings, using the Python syntax.
+
+       (i) PCRE supports the possessive quantifier  "++"  syntax,  taken  from
+       Sun's Java package.
+
+       (j) The (R) condition, for testing recursion, is a PCRE extension.
+
+       (k) The callout facility is PCRE-specific.
+
+Last updated: 09 December 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+PCRE REGULAR EXPRESSION DETAILS
+
+       The  syntax  and semantics of the regular expressions supported by PCRE
+       are described below. Regular expressions are also described in the Perl
+       documentation  and in a number of other books, some of which have copi-
+       ous examples. Jeffrey Friedl's "Mastering  Regular  Expressions",  pub-
+       lished  by  O'Reilly, covers them in great detail. The description here
+       is intended as reference documentation.
+
+       The basic operation of PCRE is on strings of bytes. However,  there  is
+       also  support for UTF-8 character strings. To use this support you must
+       build PCRE to include UTF-8 support, and then call pcre_compile()  with
+       the  PCRE_UTF8  option.  How  this affects the pattern matching is men-
+       tioned in several places below. There is also a summary of  UTF-8  fea-
+       tures in the section on UTF-8 support in the main pcre page.
+
+       A  regular  expression  is  a pattern that is matched against a subject
+       string from left to right. Most characters stand for  themselves  in  a
+       pattern,  and  match  the corresponding characters in the subject. As a
+       trivial example, the pattern
+
+         The quick brown fox
+
+       matches a portion of a subject string that is identical to itself.  The
+       power of regular expressions comes from the ability to include alterna-
+       tives and repetitions in the pattern. These are encoded in the  pattern
+       by  the  use  of meta-characters, which do not stand for themselves but
+       instead are interpreted in some special way.
+
+       There are two different sets of meta-characters: those that are  recog-
+       nized  anywhere in the pattern except within square brackets, and those
+       that are recognized in square brackets. Outside  square  brackets,  the
+       meta-characters are as follows:
+
+         \      general escape character with several uses
+         ^      assert start of string (or line, in multiline mode)
+         $      assert end of string (or line, in multiline mode)
+         .      match any character except newline (by default)
+         [      start character class definition
+         |      start of alternative branch
+         (      start subpattern
+         )      end subpattern
+         ?      extends the meaning of (
+                also 0 or 1 quantifier
+                also quantifier minimizer
+         *      0 or more quantifier
+         +      1 or more quantifier
+                also "possessive quantifier"
+         {      start min/max quantifier
+
+       Part  of  a  pattern  that is in square brackets is called a "character
+       class". In a character class the only meta-characters are:
+
+         \      general escape character
+         ^      negate the class, but only if the first character
+         -      indicates character range
+         [      POSIX character class (only if followed by POSIX
+                  syntax)
+         ]      terminates the character class
+
+       The following sections describe the use of each of the meta-characters.
+
+
+BACKSLASH
+
+       The backslash character has several uses. Firstly, if it is followed by
+       a non-alphameric character, it takes  away  any  special  meaning  that
+       character  may  have.  This  use  of  backslash  as an escape character
+       applies both inside and outside character classes.
+
+       For example, if you want to match a * character, you write  \*  in  the
+       pattern.   This  escaping  action  applies whether or not the following
+       character would otherwise be interpreted as a meta-character, so it  is
+       always  safe to precede a non-alphameric with backslash to specify that
+       it stands for itself. In particular, if you want to match a  backslash,
+       you write \\.
+
+       If  a  pattern is compiled with the PCRE_EXTENDED option, whitespace in
+       the pattern (other than in a character class) and characters between  a
+       # outside a character class and the next newline character are ignored.
+       An escaping backslash can be used to include a whitespace or #  charac-
+       ter as part of the pattern.
+
+       If  you  want  to remove the special meaning from a sequence of charac-
+       ters, you can do so by putting them between \Q and \E. This is  differ-
+       ent  from  Perl  in  that  $  and  @ are handled as literals in \Q...\E
+       sequences in PCRE, whereas in Perl, $ and @ cause  variable  interpola-
+       tion. Note the following examples:
+
+         Pattern            PCRE matches   Perl matches
+
+         \Qabc$xyz\E        abc$xyz        abc followed by the
+                                             contents of $xyz
+         \Qabc\$xyz\E       abc\$xyz       abc\$xyz
+         \Qabc\E\$\Qxyz\E   abc$xyz        abc$xyz
+
+       The  \Q...\E  sequence  is recognized both inside and outside character
+       classes.
+
+       A second use of backslash provides a way of encoding non-printing char-
+       acters  in patterns in a visible manner. There is no restriction on the
+       appearance of non-printing characters, apart from the binary zero  that
+       terminates  a  pattern,  but  when  a pattern is being prepared by text
+       editing, it is usually easier  to  use  one  of  the  following  escape
+       sequences than the binary character it represents:
+
+         \a        alarm, that is, the BEL character (hex 07)
+         \cx       "control-x", where x is any character
+         \e        escape (hex 1B)
+         \f        formfeed (hex 0C)
+         \n        newline (hex 0A)
+         \r        carriage return (hex 0D)
+         \t        tab (hex 09)
+         \ddd      character with octal code ddd, or backreference
+         \xhh      character with hex code hh
+         \x{hhh..} character with hex code hhh... (UTF-8 mode only)
+
+       The  precise  effect of \cx is as follows: if x is a lower case letter,
+       it is converted to upper case. Then bit 6 of the character (hex 40)  is
+       inverted.   Thus  \cz becomes hex 1A, but \c{ becomes hex 3B, while \c;
+       becomes hex 7B.
+
+       After \x, from zero to two hexadecimal digits are read (letters can  be
+       in  upper or lower case). In UTF-8 mode, any number of hexadecimal dig-
+       its may appear between \x{ and }, but the value of the  character  code
+       must  be  less  than  2**31  (that is, the maximum hexadecimal value is
+       7FFFFFFF). If characters other than hexadecimal digits  appear  between
+       \x{  and }, or if there is no terminating }, this form of escape is not
+       recognized. Instead, the initial \x will be interpreted as a basic hex-
+       adecimal escape, with no following digits, giving a byte whose value is
+       zero.
+
+       Characters whose value is less than 256 can be defined by either of the
+       two  syntaxes for \x when PCRE is in UTF-8 mode. There is no difference
+       in the way they are handled. For example, \xdc is exactly the  same  as
+       \x{dc}.
+
+       After  \0  up  to  two further octal digits are read. In both cases, if
+       there are fewer than two digits, just those that are present are  used.
+       Thus  the sequence \0\x\07 specifies two binary zeros followed by a BEL
+       character (code value 7). Make sure you supply  two  digits  after  the
+       initial zero if the character that follows is itself an octal digit.
+
+       The handling of a backslash followed by a digit other than 0 is compli-
+       cated.  Outside a character class, PCRE reads it and any following dig-
+       its  as  a  decimal  number. If the number is less than 10, or if there
+       have been at least that many previous capturing left parentheses in the
+       expression,  the  entire  sequence  is  taken  as  a  back reference. A
+       description of how this works is given later, following the  discussion
+       of parenthesized subpatterns.
+
+       Inside  a  character  class, or if the decimal number is greater than 9
+       and there have not been that many capturing subpatterns, PCRE  re-reads
+       up  to three octal digits following the backslash, and generates a sin-
+       gle byte from the least significant 8 bits of the value. Any subsequent
+       digits stand for themselves.  For example:
+
+         \040   is another way of writing a space
+         \40    is the same, provided there are fewer than 40
+                   previous capturing subpatterns
+         \7     is always a back reference
+         \11    might be a back reference, or another way of
+                   writing a tab
+         \011   is always a tab
+         \0113  is a tab followed by the character "3"
+         \113   might be a back reference, otherwise the
+                   character with octal code 113
+         \377   might be a back reference, otherwise
+                   the byte consisting entirely of 1 bits
+         \81    is either a back reference, or a binary zero
+                   followed by the two characters "8" and "1"
+
+       Note  that  octal  values of 100 or greater must not be introduced by a
+       leading zero, because no more than three octal digits are ever read.
+
+       All the sequences that define a single byte value  or  a  single  UTF-8
+       character (in UTF-8 mode) can be used both inside and outside character
+       classes. In addition, inside a character  class,  the  sequence  \b  is
+       interpreted  as  the  backspace character (hex 08). Outside a character
+       class it has a different meaning (see below).
+
+       The third use of backslash is for specifying generic character types:
+
+         \d     any decimal digit
+         \D     any character that is not a decimal digit
+         \s     any whitespace character
+         \S     any character that is not a whitespace character
+         \w     any "word" character
+         \W     any "non-word" character
+
+       Each pair of escape sequences partitions the complete set of characters
+       into  two disjoint sets. Any given character matches one, and only one,
+       of each pair.
+
+       In UTF-8 mode, characters with values greater than 255 never match  \d,
+       \s, or \w, and always match \D, \S, and \W.
+
+       For  compatibility  with Perl, \s does not match the VT character (code
+       11).  This makes it different from the the POSIX "space" class. The  \s
+       characters are HT (9), LF (10), FF (12), CR (13), and space (32).
+
+       A  "word" character is any letter or digit or the underscore character,
+       that is, any character which can be part of a Perl "word". The  defini-
+       tion  of  letters  and digits is controlled by PCRE's character tables,
+       and may vary if locale- specific matching is taking place (see  "Locale
+       support"  in  the  pcreapi  page).  For  example,  in the "fr" (French)
+       locale, some character codes greater than 128  are  used  for  accented
+       letters, and these are matched by \w.
+
+       These character type sequences can appear both inside and outside char-
+       acter classes. They each match one character of the  appropriate  type.
+       If  the current matching point is at the end of the subject string, all
+       of them fail, since there is no character to match.
+
+       The fourth use of backslash is for certain simple assertions. An asser-
+       tion  specifies a condition that has to be met at a particular point in
+       a match, without consuming any characters from the subject string.  The
+       use  of subpatterns for more complicated assertions is described below.
+       The backslashed assertions are
+
+         \b     matches at a word boundary
+         \B     matches when not at a word boundary
+         \A     matches at start of subject
+         \Z     matches at end of subject or before newline at end
+         \z     matches at end of subject
+         \G     matches at first matching position in subject
+
+       These assertions may not appear in character classes (but note that  \b
+       has a different meaning, namely the backspace character, inside a char-
+       acter class).
+
+       A word boundary is a position in the subject string where  the  current
+       character  and  the previous character do not both match \w or \W (i.e.
+       one matches \w and the other matches \W), or the start or  end  of  the
+       string if the first or last character matches \w, respectively.
+
+       The  \A,  \Z,  and \z assertions differ from the traditional circumflex
+       and dollar (described below) in that they only ever match at  the  very
+       start  and  end  of the subject string, whatever options are set. Thus,
+       they are independent of multiline mode.
+
+       They are not affected by the PCRE_NOTBOL or PCRE_NOTEOL options. If the
+       startoffset argument of pcre_exec() is non-zero, indicating that match-
+       ing is to start at a point other than the beginning of the subject,  \A
+       can  never  match.  The difference between \Z and \z is that \Z matches
+       before a newline that is the last character of the string as well as at
+       the end of the string, whereas \z matches only at the end.
+
+       The  \G assertion is true only when the current matching position is at
+       the start point of the match, as specified by the startoffset  argument
+       of  pcre_exec().  It  differs  from \A when the value of startoffset is
+       non-zero. By calling pcre_exec() multiple times with appropriate  argu-
+       ments, you can mimic Perl's /g option, and it is in this kind of imple-
+       mentation where \G can be useful.
+
+       Note, however, that PCRE's interpretation of \G, as the  start  of  the
+       current match, is subtly different from Perl's, which defines it as the
+       end of the previous match. In Perl, these can  be  different  when  the
+       previously  matched  string was empty. Because PCRE does just one match
+       at a time, it cannot reproduce this behaviour.
+
+       If all the alternatives of a pattern begin with \G, the  expression  is
+       anchored to the starting match position, and the "anchored" flag is set
+       in the compiled regular expression.
+
+
+CIRCUMFLEX AND DOLLAR
+
+       Outside a character class, in the default matching mode, the circumflex
+       character  is  an  assertion which is true only if the current matching
+       point is at the start of the subject string. If the  startoffset  argu-
+       ment  of  pcre_exec()  is  non-zero,  circumflex can never match if the
+       PCRE_MULTILINE option is unset. Inside a  character  class,  circumflex
+       has an entirely different meaning (see below).
+
+       Circumflex  need  not be the first character of the pattern if a number
+       of alternatives are involved, but it should be the first thing in  each
+       alternative  in  which  it appears if the pattern is ever to match that
+       branch. If all possible alternatives start with a circumflex, that  is,
+       if  the  pattern  is constrained to match only at the start of the sub-
+       ject, it is said to be an "anchored" pattern.  (There  are  also  other
+       constructs that can cause a pattern to be anchored.)
+
+       A  dollar  character  is an assertion which is true only if the current
+       matching point is at the end of  the  subject  string,  or  immediately
+       before a newline character that is the last character in the string (by
+       default). Dollar need not be the last character of  the  pattern  if  a
+       number  of alternatives are involved, but it should be the last item in
+       any branch in which it appears.  Dollar has no  special  meaning  in  a
+       character class.
+
+       The  meaning  of  dollar  can be changed so that it matches only at the
+       very end of the string, by setting the  PCRE_DOLLAR_ENDONLY  option  at
+       compile time. This does not affect the \Z assertion.
+
+       The meanings of the circumflex and dollar characters are changed if the
+       PCRE_MULTILINE option is set. When this is the case, they match immedi-
+       ately  after  and  immediately  before  an  internal newline character,
+       respectively, in addition to matching at the start and end of the  sub-
+       ject  string.  For  example,  the  pattern  /^abc$/ matches the subject
+       string "def\nabc" in multiline mode, but not  otherwise.  Consequently,
+       patterns  that  are  anchored  in single line mode because all branches
+       start with ^ are not anchored in multiline mode, and a match  for  cir-
+       cumflex  is  possible  when  the startoffset argument of pcre_exec() is
+       non-zero. The PCRE_DOLLAR_ENDONLY option is ignored  if  PCRE_MULTILINE
+       is set.
+
+       Note  that  the sequences \A, \Z, and \z can be used to match the start
+       and end of the subject in both modes, and if all branches of a  pattern
+       start  with  \A it is always anchored, whether PCRE_MULTILINE is set or
+       not.
+
+
+FULL STOP (PERIOD, DOT)
+
+       Outside a character class, a dot in the pattern matches any one charac-
+       ter  in  the  subject,  including a non-printing character, but not (by
+       default) newline.  In UTF-8 mode, a dot matches  any  UTF-8  character,
+       which  might  be  more than one byte long, except (by default) for new-
+       line. If the PCRE_DOTALL option is set, dots match  newlines  as  well.
+       The  handling of dot is entirely independent of the handling of circum-
+       flex and dollar, the only relationship being  that  they  both  involve
+       newline characters. Dot has no special meaning in a character class.
+
+
+MATCHING A SINGLE BYTE
+
+       Outside a character class, the escape sequence \C matches any one byte,
+       both in and out of UTF-8 mode. Unlike a dot, it always matches  a  new-
+       line.  The  feature  is  provided  in Perl in order to match individual
+       bytes in UTF-8 mode.  Because it breaks up UTF-8 characters into  indi-
+       vidual  bytes,  what  remains  in  the  string may be a malformed UTF-8
+       string. For this reason it is best avoided.
+
+       PCRE does not allow \C to appear in lookbehind assertions (see  below),
+       because in UTF-8 mode it makes it impossible to calculate the length of
+       the lookbehind.
+
+
+SQUARE BRACKETS
+
+       An opening square bracket introduces a character class, terminated by a
+       closing square bracket. A closing square bracket on its own is not spe-
+       cial. If a closing square bracket is required as a member of the class,
+       it  should  be  the first data character in the class (after an initial
+       circumflex, if present) or escaped with a backslash.
+
+       A character class matches a single character in the subject.  In  UTF-8
+       mode,  the character may occupy more than one byte. A matched character
+       must be in the set of characters defined by the class, unless the first
+       character  in  the  class definition is a circumflex, in which case the
+       subject character must not be in the set defined by  the  class.  If  a
+       circumflex  is actually required as a member of the class, ensure it is
+       not the first character, or escape it with a backslash.
+
+       For example, the character class [aeiou] matches any lower case  vowel,
+       while  [^aeiou]  matches  any character that is not a lower case vowel.
+       Note that a circumflex is just a convenient notation for specifying the
+       characters which are in the class by enumerating those that are not. It
+       is not an assertion: it still consumes a  character  from  the  subject
+       string, and fails if the current pointer is at the end of the string.
+
+       In  UTF-8 mode, characters with values greater than 255 can be included
+       in a class as a literal string of bytes, or by using the  \x{  escaping
+       mechanism.
+
+       When  caseless  matching  is set, any letters in a class represent both
+       their upper case and lower case versions, so for  example,  a  caseless
+       [aeiou]  matches  "A"  as well as "a", and a caseless [^aeiou] does not
+       match "A", whereas a caseful version would. PCRE does not  support  the
+       concept of case for characters with values greater than 255.
+
+       The  newline character is never treated in any special way in character
+       classes, whatever the setting  of  the  PCRE_DOTALL  or  PCRE_MULTILINE
+       options is. A class such as [^a] will always match a newline.
+
+       The  minus (hyphen) character can be used to specify a range of charac-
+       ters in a character  class.  For  example,  [d-m]  matches  any  letter
+       between  d  and  m,  inclusive.  If  a minus character is required in a
+       class, it must be escaped with a backslash  or  appear  in  a  position
+       where  it cannot be interpreted as indicating a range, typically as the
+       first or last character in the class.
+
+       It is not possible to have the literal character "]" as the end charac-
+       ter  of a range. A pattern such as [W-]46] is interpreted as a class of
+       two characters ("W" and "-") followed by a literal string "46]", so  it
+       would  match  "W46]"  or  "-46]". However, if the "]" is escaped with a
+       backslash it is interpreted as the end of range, so [W-\]46] is  inter-
+       preted  as  a  single class containing a range followed by two separate
+       characters. The octal or hexadecimal representation of "]" can also  be
+       used to end a range.
+
+       Ranges  operate in the collating sequence of character values. They can
+       also  be  used  for  characters  specified  numerically,  for   example
+       [\000-\037].  In UTF-8 mode, ranges can include characters whose values
+       are greater than 255, for example [\x{100}-\x{2ff}].
+
+       If a range that includes letters is used when caseless matching is set,
+       it matches the letters in either case. For example, [W-c] is equivalent
+       to [][\^_`wxyzabc], matched caselessly, and if character tables for the
+       "fr"  locale  are  in use, [\xc8-\xcb] matches accented E characters in
+       both cases.
+
+       The character types \d, \D, \s, \S, \w, and \W may  also  appear  in  a
+       character  class,  and add the characters that they match to the class.
+       For example, [\dABCDEF] matches any hexadecimal digit. A circumflex can
+       conveniently  be  used with the upper case character types to specify a
+       more restricted set of characters than the matching  lower  case  type.
+       For  example,  the  class  [^\W_]  matches any letter or digit, but not
+       underscore.
+
+       All non-alphameric characters other than \, -, ^ (at the start) and the
+       terminating ] are non-special in character classes, but it does no harm
+       if they are escaped.
+
+
+POSIX CHARACTER CLASSES
+
+       Perl supports the POSIX notation  for  character  classes,  which  uses
+       names  enclosed by [: and :] within the enclosing square brackets. PCRE
+       also supports this notation. For example,
+
+         [01[:alpha:]%]
+
+       matches "0", "1", any alphabetic character, or "%". The supported class
+       names are
+
+         alnum    letters and digits
+         alpha    letters
+         ascii    character codes 0 - 127
+         blank    space or tab only
+         cntrl    control characters
+         digit    decimal digits (same as \d)
+         graph    printing characters, excluding space
+         lower    lower case letters
+         print    printing characters, including space
+         punct    printing characters, excluding letters and digits
+         space    white space (not quite the same as \s)
+         upper    upper case letters
+         word     "word" characters (same as \w)
+         xdigit   hexadecimal digits
+
+       The  "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13),
+       and space (32). Notice that this list includes the VT  character  (code
+       11). This makes "space" different to \s, which does not include VT (for
+       Perl compatibility).
+
+       The name "word" is a Perl extension, and "blank"  is  a  GNU  extension
+       from  Perl  5.8. Another Perl extension is negation, which is indicated
+       by a ^ character after the colon. For example,
+
+         [12[:^digit:]]
+
+       matches "1", "2", or any non-digit. PCRE (and Perl) also recognize  the
+       POSIX syntax [.ch.] and [=ch=] where "ch" is a "collating element", but
+       these are not supported, and an error is given if they are encountered.
+
+       In UTF-8 mode, characters with values greater than 255 do not match any
+       of the POSIX character classes.
+
+
+VERTICAL BAR
+
+       Vertical bar characters are used to separate alternative patterns.  For
+       example, the pattern
+
+         gilbert|sullivan
+
+       matches  either "gilbert" or "sullivan". Any number of alternatives may
+       appear, and an empty  alternative  is  permitted  (matching  the  empty
+       string).   The  matching  process  tries each alternative in turn, from
+       left to right, and the first one that succeeds is used. If the alterna-
+       tives  are within a subpattern (defined below), "succeeds" means match-
+       ing the rest of the main pattern as well as the alternative in the sub-
+       pattern.
+
+
+INTERNAL OPTION SETTING
+
+       The  settings  of  the  PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, and
+       PCRE_EXTENDED options can be changed  from  within  the  pattern  by  a
+       sequence  of  Perl  option  letters  enclosed between "(?" and ")". The
+       option letters are
+
+         i  for PCRE_CASELESS
+         m  for PCRE_MULTILINE
+         s  for PCRE_DOTALL
+         x  for PCRE_EXTENDED
+
+       For example, (?im) sets caseless, multiline matching. It is also possi-
+       ble to unset these options by preceding the letter with a hyphen, and a
+       combined setting and unsetting such as (?im-sx), which sets  PCRE_CASE-
+       LESS  and PCRE_MULTILINE while unsetting PCRE_DOTALL and PCRE_EXTENDED,
+       is also permitted. If a  letter  appears  both  before  and  after  the
+       hyphen, the option is unset.
+
+       When  an option change occurs at top level (that is, not inside subpat-
+       tern parentheses), the change applies to the remainder of  the  pattern
+       that follows.  If the change is placed right at the start of a pattern,
+       PCRE extracts it into the global options (and it will therefore show up
+       in data extracted by the pcre_fullinfo() function).
+
+       An option change within a subpattern affects only that part of the cur-
+       rent pattern that follows it, so
+
+         (a(?i)b)c
+
+       matches abc and aBc and no other strings (assuming PCRE_CASELESS is not
+       used).   By  this means, options can be made to have different settings
+       in different parts of the pattern. Any changes made in one  alternative
+       do  carry  on  into subsequent branches within the same subpattern. For
+       example,
+
+         (a(?i)b|c)
+
+       matches "ab", "aB", "c", and "C", even though  when  matching  "C"  the
+       first  branch  is  abandoned before the option setting. This is because
+       the effects of option settings happen at compile time. There  would  be
+       some very weird behaviour otherwise.
+
+       The  PCRE-specific  options PCRE_UNGREEDY and PCRE_EXTRA can be changed
+       in the same way as the Perl-compatible options by using the  characters
+       U  and X respectively. The (?X) flag setting is special in that it must
+       always occur earlier in the pattern than any of the additional features
+       it turns on, even when it is at top level. It is best put at the start.
+
+
+SUBPATTERNS
+
+       Subpatterns are delimited by parentheses (round brackets), which can be
+       nested.  Marking part of a pattern as a subpattern does two things:
+
+       1. It localizes a set of alternatives. For example, the pattern
+
+         cat(aract|erpillar|)
+
+       matches  one  of the words "cat", "cataract", or "caterpillar". Without
+       the parentheses, it would match "cataract",  "erpillar"  or  the  empty
+       string.
+
+       2.  It  sets  up  the  subpattern as a capturing subpattern (as defined
+       above).  When the whole pattern matches, that portion  of  the  subject
+       string that matched the subpattern is passed back to the caller via the
+       ovector argument of pcre_exec(). Opening parentheses are  counted  from
+       left  to right (starting from 1) to obtain the numbers of the capturing
+       subpatterns.
+
+       For example, if the string "the red king" is matched against  the  pat-
+       tern
+
+         the ((red|white) (king|queen))
+
+       the captured substrings are "red king", "red", and "king", and are num-
+       bered 1, 2, and 3, respectively.
+
+       The fact that plain parentheses fulfil  two  functions  is  not  always
+       helpful.   There are often times when a grouping subpattern is required
+       without a capturing requirement. If an opening parenthesis is  followed
+       by  a question mark and a colon, the subpattern does not do any captur-
+       ing, and is not counted when computing the  number  of  any  subsequent
+       capturing  subpatterns. For example, if the string "the white queen" is
+       matched against the pattern
+
+         the ((?:red|white) (king|queen))
+
+       the captured substrings are "white queen" and "queen", and are numbered
+       1  and 2. The maximum number of capturing subpatterns is 65535, and the
+       maximum depth of nesting of all subpatterns, both  capturing  and  non-
+       capturing, is 200.
+
+       As  a  convenient shorthand, if any option settings are required at the
+       start of a non-capturing subpattern,  the  option  letters  may  appear
+       between the "?" and the ":". Thus the two patterns
+
+         (?i:saturday|sunday)
+         (?:(?i)saturday|sunday)
+
+       match exactly the same set of strings. Because alternative branches are
+       tried from left to right, and options are not reset until  the  end  of
+       the  subpattern is reached, an option setting in one branch does affect
+       subsequent branches, so the above patterns match "SUNDAY"  as  well  as
+       "Saturday".
+
+
+NAMED SUBPATTERNS
+
+       Identifying  capturing  parentheses  by number is simple, but it can be
+       very hard to keep track of the numbers in complicated  regular  expres-
+       sions.  Furthermore,  if  an  expression  is  modified, the numbers may
+       change. To help with the difficulty, PCRE supports the naming  of  sub-
+       patterns,  something  that  Perl  does  not  provide. The Python syntax
+       (?P<name>...) is used. Names consist  of  alphanumeric  characters  and
+       underscores, and must be unique within a pattern.
+
+       Named  capturing  parentheses  are  still  allocated numbers as well as
+       names. The PCRE API provides function calls for extracting the name-to-
+       number  translation  table from a compiled pattern. For further details
+       see the pcreapi documentation.
+
+
+REPETITION
+
+       Repetition is specified by quantifiers, which can  follow  any  of  the
+       following items:
+
+         a literal data character
+         the . metacharacter
+         the \C escape sequence
+         escapes such as \d that match single characters
+         a character class
+         a back reference (see next section)
+         a parenthesized subpattern (unless it is an assertion)
+
+       The  general repetition quantifier specifies a minimum and maximum num-
+       ber of permitted matches, by giving the two numbers in  curly  brackets
+       (braces),  separated  by  a comma. The numbers must be less than 65536,
+       and the first must be less than or equal to the second. For example:
+
+         z{2,4}
+
+       matches "zz", "zzz", or "zzzz". A closing brace on its  own  is  not  a
+       special  character.  If  the second number is omitted, but the comma is
+       present, there is no upper limit; if the second number  and  the  comma
+       are  both omitted, the quantifier specifies an exact number of required
+       matches. Thus
+
+         [aeiou]{3,}
+
+       matches at least 3 successive vowels, but may match many more, while
+
+         \d{8}
+
+       matches exactly 8 digits. An opening curly bracket that  appears  in  a
+       position  where a quantifier is not allowed, or one that does not match
+       the syntax of a quantifier, is taken as a literal character. For  exam-
+       ple, {,6} is not a quantifier, but a literal string of four characters.
+
+       In UTF-8 mode, quantifiers apply to UTF-8  characters  rather  than  to
+       individual bytes. Thus, for example, \x{100}{2} matches two UTF-8 char-
+       acters, each of which is represented by a two-byte sequence.
+
+       The quantifier {0} is permitted, causing the expression to behave as if
+       the previous item and the quantifier were not present.
+
+       For  convenience  (and  historical compatibility) the three most common
+       quantifiers have single-character abbreviations:
+
+         *    is equivalent to {0,}
+         +    is equivalent to {1,}
+         ?    is equivalent to {0,1}
+
+       It is possible to construct infinite loops by  following  a  subpattern
+       that can match no characters with a quantifier that has no upper limit,
+       for example:
+
+         (a?)*
+
+       Earlier versions of Perl and PCRE used to give an error at compile time
+       for  such  patterns. However, because there are cases where this can be
+       useful, such patterns are now accepted, but if any  repetition  of  the
+       subpattern  does in fact match no characters, the loop is forcibly bro-
+       ken.
+
+       By default, the quantifiers are "greedy", that is, they match  as  much
+       as  possible  (up  to  the  maximum number of permitted times), without
+       causing the rest of the pattern to fail. The classic example  of  where
+       this gives problems is in trying to match comments in C programs. These
+       appear between the sequences /* and */ and within the  sequence,  indi-
+       vidual * and / characters may appear. An attempt to match C comments by
+       applying the pattern
+
+         /\*.*\*/
+
+       to the string
+
+         /* first command */  not comment  /* second comment */
+
+       fails, because it matches the entire string owing to the greediness  of
+       the .*  item.
+
+       However,  if  a quantifier is followed by a question mark, it ceases to
+       be greedy, and instead matches the minimum number of times possible, so
+       the pattern
+
+         /\*.*?\*/
+
+       does  the  right  thing with the C comments. The meaning of the various
+       quantifiers is not otherwise changed,  just  the  preferred  number  of
+       matches.   Do  not  confuse this use of question mark with its use as a
+       quantifier in its own right. Because it has two uses, it can  sometimes
+       appear doubled, as in
+
+         \d??\d
+
+       which matches one digit by preference, but can match two if that is the
+       only way the rest of the pattern matches.
+
+       If the PCRE_UNGREEDY option is set (an option which is not available in
+       Perl),  the  quantifiers are not greedy by default, but individual ones
+       can be made greedy by following them with a  question  mark.  In  other
+       words, it inverts the default behaviour.
+
+       When  a  parenthesized  subpattern  is quantified with a minimum repeat
+       count that is greater than 1 or with a limited maximum, more  store  is
+       required  for  the  compiled  pattern, in proportion to the size of the
+       minimum or maximum.
+
+       If a pattern starts with .* or .{0,} and the PCRE_DOTALL option (equiv-
+       alent  to Perl's /s) is set, thus allowing the . to match newlines, the
+       pattern is implicitly anchored, because whatever follows will be  tried
+       against  every character position in the subject string, so there is no
+       point in retrying the overall match at any position  after  the  first.
+       PCRE normally treats such a pattern as though it were preceded by \A.
+
+       In  cases  where  it  is known that the subject string contains no new-
+       lines, it is worth setting PCRE_DOTALL in order to  obtain  this  opti-
+       mization, or alternatively using ^ to indicate anchoring explicitly.
+
+       However,  there is one situation where the optimization cannot be used.
+       When .*  is inside capturing parentheses that  are  the  subject  of  a
+       backreference  elsewhere in the pattern, a match at the start may fail,
+       and a later one succeed. Consider, for example:
+
+         (.*)abc\1
+
+       If the subject is "xyz123abc123" the match point is the fourth  charac-
+       ter. For this reason, such a pattern is not implicitly anchored.
+
+       When a capturing subpattern is repeated, the value captured is the sub-
+       string that matched the final iteration. For example, after
+
+         (tweedle[dume]{3}\s*)+
+
+       has matched "tweedledum tweedledee" the value of the captured substring
+       is  "tweedledee".  However,  if there are nested capturing subpatterns,
+       the corresponding captured values may have been set in previous  itera-
+       tions. For example, after
+
+         /(a|(b))+/
+
+       matches "aba" the value of the second captured substring is "b".
+
+
+ATOMIC GROUPING AND POSSESSIVE QUANTIFIERS
+
+       With both maximizing and minimizing repetition, failure of what follows
+       normally causes the repeated item to be re-evaluated to see if  a  dif-
+       ferent number of repeats allows the rest of the pattern to match. Some-
+       times it is useful to prevent this, either to change the nature of  the
+       match,  or  to  cause it fail earlier than it otherwise might, when the
+       author of the pattern knows there is no point in carrying on.
+
+       Consider, for example, the pattern \d+foo when applied to  the  subject
+       line
+
+         123456bar
+
+       After matching all 6 digits and then failing to match "foo", the normal
+       action of the matcher is to try again with only 5 digits  matching  the
+       \d+  item,  and  then  with  4,  and  so on, before ultimately failing.
+       "Atomic grouping" (a term taken from Jeffrey  Friedl's  book)  provides
+       the  means for specifying that once a subpattern has matched, it is not
+       to be re-evaluated in this way.
+
+       If we use atomic grouping for the previous example, the  matcher  would
+       give up immediately on failing to match "foo" the first time. The nota-
+       tion is a kind of special parenthesis, starting with  (?>  as  in  this
+       example:
+
+         (?>\d+)foo
+
+       This  kind  of  parenthesis "locks up" the  part of the pattern it con-
+       tains once it has matched, and a failure further into  the  pattern  is
+       prevented  from  backtracking into it. Backtracking past it to previous
+       items, however, works as normal.
+
+       An alternative description is that a subpattern of  this  type  matches
+       the  string  of  characters  that an identical standalone pattern would
+       match, if anchored at the current point in the subject string.
+
+       Atomic grouping subpatterns are not capturing subpatterns. Simple cases
+       such as the above example can be thought of as a maximizing repeat that
+       must swallow everything it can. So, while both \d+ and  \d+?  are  pre-
+       pared  to  adjust  the number of digits they match in order to make the
+       rest of the pattern match, (?>\d+) can only match an entire sequence of
+       digits.
+
+       Atomic  groups in general can of course contain arbitrarily complicated
+       subpatterns, and can be nested. However, when  the  subpattern  for  an
+       atomic group is just a single repeated item, as in the example above, a
+       simpler notation, called a "possessive quantifier" can  be  used.  This
+       consists  of  an  additional  + character following a quantifier. Using
+       this notation, the previous example can be rewritten as
+
+         \d++bar
+
+       Possessive  quantifiers  are  always  greedy;  the   setting   of   the
+       PCRE_UNGREEDY option is ignored. They are a convenient notation for the
+       simpler forms of atomic group. However, there is no difference  in  the
+       meaning  or  processing  of  a possessive quantifier and the equivalent
+       atomic group.
+
+       The possessive quantifier syntax is an extension to the Perl syntax. It
+       originates in Sun's Java package.
+
+       When  a  pattern  contains an unlimited repeat inside a subpattern that
+       can itself be repeated an unlimited number of  times,  the  use  of  an
+       atomic  group  is  the  only way to avoid some failing matches taking a
+       very long time indeed. The pattern
+
+         (\D+|<\d+>)*[!?]
+
+       matches an unlimited number of substrings that either consist  of  non-
+       digits,  or  digits  enclosed in <>, followed by either ! or ?. When it
+       matches, it runs quickly. However, if it is applied to
+
+         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+
+       it takes a long time before reporting  failure.  This  is  because  the
+       string  can  be  divided  between  the two repeats in a large number of
+       ways, and all have to be tried. (The example used [!?]  rather  than  a
+       single  character  at the end, because both PCRE and Perl have an opti-
+       mization that allows for fast failure when a single character is  used.
+       They  remember  the last single character that is required for a match,
+       and fail early if it is not present in the string.)  If the pattern  is
+       changed to
+
+         ((?>\D+)|<\d+>)*[!?]
+
+       sequences  of non-digits cannot be broken, and failure happens quickly.
+
+
+BACK REFERENCES
+
+       Outside a character class, a backslash followed by a digit greater than
+       0 (and possibly further digits) is a back reference to a capturing sub-
+       pattern earlier (that is, to its left) in the pattern,  provided  there
+       have been that many previous capturing left parentheses.
+
+       However, if the decimal number following the backslash is less than 10,
+       it is always taken as a back reference, and causes  an  error  only  if
+       there  are  not that many capturing left parentheses in the entire pat-
+       tern. In other words, the parentheses that are referenced need  not  be
+       to  the left of the reference for numbers less than 10. See the section
+       entitled "Backslash" above for further details of the handling of  dig-
+       its following a backslash.
+
+       A  back  reference matches whatever actually matched the capturing sub-
+       pattern in the current subject string, rather  than  anything  matching
+       the subpattern itself (see "Subpatterns as subroutines" below for a way
+       of doing that). So the pattern
+
+         (sens|respons)e and \1ibility
+
+       matches "sense and sensibility" and "response and responsibility",  but
+       not  "sense and responsibility". If caseful matching is in force at the
+       time of the back reference, the case of letters is relevant. For  exam-
+       ple,
+
+         ((?i)rah)\s+\1
+
+       matches  "rah  rah"  and  "RAH RAH", but not "RAH rah", even though the
+       original capturing subpattern is matched caselessly.
+
+       Back references to named subpatterns use the Python  syntax  (?P=name).
+       We could rewrite the above example as follows:
+
+         (?<p1>(?i)rah)\s+(?P=p1)
+
+       There  may be more than one back reference to the same subpattern. If a
+       subpattern has not actually been used in a particular match,  any  back
+       references to it always fail. For example, the pattern
+
+         (a|(bc))\2
+
+       always  fails if it starts to match "a" rather than "bc". Because there
+       may be many capturing parentheses in a pattern,  all  digits  following
+       the  backslash  are taken as part of a potential back reference number.
+       If the pattern continues with a digit character, some delimiter must be
+       used  to  terminate  the back reference. If the PCRE_EXTENDED option is
+       set, this can be whitespace.  Otherwise an empty comment can be used.
+
+       A back reference that occurs inside the parentheses to which it  refers
+       fails  when  the subpattern is first used, so, for example, (a\1) never
+       matches.  However, such references can be useful inside  repeated  sub-
+       patterns. For example, the pattern
+
+         (a|b\1)+
+
+       matches any number of "a"s and also "aba", "ababbaa" etc. At each iter-
+       ation of the subpattern,  the  back  reference  matches  the  character
+       string  corresponding  to  the previous iteration. In order for this to
+       work, the pattern must be such that the first iteration does  not  need
+       to  match the back reference. This can be done using alternation, as in
+       the example above, or by a quantifier with a minimum of zero.
+
+
+ASSERTIONS
+
+       An assertion is a test on the characters  following  or  preceding  the
+       current  matching  point that does not actually consume any characters.
+       The simple assertions coded as \b, \B, \A, \G, \Z,  \z,  ^  and  $  are
+       described above.  More complicated assertions are coded as subpatterns.
+       There are two kinds: those that look ahead of the current  position  in
+       the subject string, and those that look behind it.
+
+       An  assertion  subpattern  is matched in the normal way, except that it
+       does not cause the current matching position to be  changed.  Lookahead
+       assertions  start with (?= for positive assertions and (?! for negative
+       assertions. For example,
+
+         \w+(?=;)
+
+       matches a word followed by a semicolon, but does not include the  semi-
+       colon in the match, and
+
+         foo(?!bar)
+
+       matches  any  occurrence  of  "foo" that is not followed by "bar". Note
+       that the apparently similar pattern
+
+         (?!foo)bar
+
+       does not find an occurrence of "bar"  that  is  preceded  by  something
+       other  than "foo"; it finds any occurrence of "bar" whatsoever, because
+       the assertion (?!foo) is always true when the next three characters are
+       "bar". A lookbehind assertion is needed to achieve this effect.
+
+       If you want to force a matching failure at some point in a pattern, the
+       most convenient way to do it is  with  (?!)  because  an  empty  string
+       always  matches, so an assertion that requires there not to be an empty
+       string must always fail.
+
+       Lookbehind assertions start with (?<= for positive assertions and  (?<!
+       for negative assertions. For example,
+
+         (?<!foo)bar
+
+       does  find  an  occurrence  of "bar" that is not preceded by "foo". The
+       contents of a lookbehind assertion are restricted  such  that  all  the
+       strings it matches must have a fixed length. However, if there are sev-
+       eral alternatives, they do not all have to have the same fixed  length.
+       Thus
+
+         (?<=bullock|donkey)
+
+       is permitted, but
+
+         (?<!dogs?|cats?)
+
+       causes  an  error at compile time. Branches that match different length
+       strings are permitted only at the top level of a lookbehind  assertion.
+       This  is  an  extension  compared  with  Perl (at least for 5.8), which
+       requires all branches to match the same length of string. An  assertion
+       such as
+
+         (?<=ab(c|de))
+
+       is  not  permitted,  because  its single top-level branch can match two
+       different lengths, but it is acceptable if rewritten to  use  two  top-
+       level branches:
+
+         (?<=abc|abde)
+
+       The  implementation  of lookbehind assertions is, for each alternative,
+       to temporarily move the current position back by the  fixed  width  and
+       then try to match. If there are insufficient characters before the cur-
+       rent position, the match is deemed to fail.
+
+       PCRE does not allow the \C escape (which matches a single byte in UTF-8
+       mode)  to appear in lookbehind assertions, because it makes it impossi-
+       ble to calculate the length of the lookbehind.
+
+       Atomic groups can be used in conjunction with lookbehind assertions  to
+       specify efficient matching at the end of the subject string. Consider a
+       simple pattern such as
+
+         abcd$
+
+       when applied to a long string that does  not  match.  Because  matching
+       proceeds from left to right, PCRE will look for each "a" in the subject
+       and then see if what follows matches the rest of the  pattern.  If  the
+       pattern is specified as
+
+         ^.*abcd$
+
+       the  initial .* matches the entire string at first, but when this fails
+       (because there is no following "a"), it backtracks to match all but the
+       last  character,  then all but the last two characters, and so on. Once
+       again the search for "a" covers the entire string, from right to  left,
+       so we are no better off. However, if the pattern is written as
+
+         ^(?>.*)(?<=abcd)
+
+       or, equivalently,
+
+         ^.*+(?<=abcd)
+
+       there  can  be  no  backtracking for the .* item; it can match only the
+       entire string. The subsequent lookbehind assertion does a  single  test
+       on  the last four characters. If it fails, the match fails immediately.
+       For long strings, this approach makes a significant difference  to  the
+       processing time.
+
+       Several assertions (of any sort) may occur in succession. For example,
+
+         (?<=\d{3})(?<!999)foo
+
+       matches  "foo" preceded by three digits that are not "999". Notice that
+       each of the assertions is applied independently at the  same  point  in
+       the  subject  string.  First  there  is a check that the previous three
+       characters are all digits, and then there is  a  check  that  the  same
+       three characters are not "999".  This pattern does not match "foo" pre-
+       ceded by six characters, the first of which are  digits  and  the  last
+       three  of  which  are not "999". For example, it doesn't match "123abc-
+       foo". A pattern to do that is
+
+         (?<=\d{3}...)(?<!999)foo
+
+       This time the first assertion looks at the  preceding  six  characters,
+       checking that the first three are digits, and then the second assertion
+       checks that the preceding three characters are not "999".
+
+       Assertions can be nested in any combination. For example,
+
+         (?<=(?<!foo)bar)baz
+
+       matches an occurrence of "baz" that is preceded by "bar" which in  turn
+       is not preceded by "foo", while
+
+         (?<=\d{3}(?!999)...)foo
+
+       is another pattern which matches "foo" preceded by three digits and any
+       three characters that are not "999".
+
+       Assertion subpatterns are not capturing subpatterns,  and  may  not  be
+       repeated,  because  it  makes no sense to assert the same thing several
+       times. If any kind of assertion contains capturing  subpatterns  within
+       it,  these are counted for the purposes of numbering the capturing sub-
+       patterns in the whole pattern.  However, substring capturing is carried
+       out  only  for  positive assertions, because it does not make sense for
+       negative assertions.
+
+
+CONDITIONAL SUBPATTERNS
+
+       It is possible to cause the matching process to obey a subpattern  con-
+       ditionally  or to choose between two alternative subpatterns, depending
+       on the  result  of  an  assertion,  or  whether  a  previous  capturing
+       subpattern  matched  or not. The two possible forms of conditional sub-
+       pattern are
+
+         (?(condition)yes-pattern)
+         (?(condition)yes-pattern|no-pattern)
+
+       If the condition is satisfied, the yes-pattern is used;  otherwise  the
+       no-pattern  (if  present)  is used. If there are more than two alterna-
+       tives in the subpattern, a compile-time error occurs.
+
+       There are three kinds of condition. If the text between the parentheses
+       consists  of  a  sequence  of digits, the condition is satisfied if the
+       capturing subpattern of that number has previously matched. The  number
+       must  be  greater than zero. Consider the following pattern, which con-
+       tains non-significant white space to make it more readable (assume  the
+       PCRE_EXTENDED  option)  and  to  divide it into three parts for ease of
+       discussion:
+
+         ( \( )?    [^()]+    (?(1) \) )
+
+       The first part matches an optional opening  parenthesis,  and  if  that
+       character is present, sets it as the first captured substring. The sec-
+       ond part matches one or more characters that are not  parentheses.  The
+       third part is a conditional subpattern that tests whether the first set
+       of parentheses matched or not. If they did, that is, if subject started
+       with an opening parenthesis, the condition is true, and so the yes-pat-
+       tern is executed and a  closing  parenthesis  is  required.  Otherwise,
+       since  no-pattern  is  not  present, the subpattern matches nothing. In
+       other words,  this  pattern  matches  a  sequence  of  non-parentheses,
+       optionally enclosed in parentheses.
+
+       If the condition is the string (R), it is satisfied if a recursive call
+       to the pattern or subpattern has been made. At "top level", the  condi-
+       tion  is  false.   This  is  a  PCRE  extension. Recursive patterns are
+       described in the next section.
+
+       If the condition is not a sequence of digits or  (R),  it  must  be  an
+       assertion.   This may be a positive or negative lookahead or lookbehind
+       assertion. Consider  this  pattern,  again  containing  non-significant
+       white space, and with the two alternatives on the second line:
+
+         (?(?=[^a-z]*[a-z])
+         \d{2}-[a-z]{3}-\d{2}  |  \d{2}-\d{2}-\d{2} )
+
+       The  condition  is  a  positive  lookahead  assertion  that  matches an
+       optional sequence of non-letters followed by a letter. In other  words,
+       it  tests  for the presence of at least one letter in the subject. If a
+       letter is found, the subject is matched against the first  alternative;
+       otherwise  it  is  matched  against  the  second.  This pattern matches
+       strings in one of the two forms dd-aaa-dd or dd-dd-dd,  where  aaa  are
+       letters and dd are digits.
+
+
+COMMENTS
+
+       The sequence (?# marks the start of a comment which continues up to the
+       next closing parenthesis. Nested parentheses  are  not  permitted.  The
+       characters  that make up a comment play no part in the pattern matching
+       at all.
+
+       If the PCRE_EXTENDED option is set, an unescaped # character outside  a
+       character class introduces a comment that continues up to the next new-
+       line character in the pattern.
+
+
+RECURSIVE PATTERNS
+
+       Consider the problem of matching a string in parentheses, allowing  for
+       unlimited  nested  parentheses.  Without the use of recursion, the best
+       that can be done is to use a pattern that  matches  up  to  some  fixed
+       depth  of  nesting.  It  is not possible to handle an arbitrary nesting
+       depth. Perl has provided an experimental facility that  allows  regular
+       expressions to recurse (amongst other things). It does this by interpo-
+       lating Perl code in the expression at run time, and the code can  refer
+       to the expression itself. A Perl pattern to solve the parentheses prob-
+       lem can be created like this:
+
+         $re = qr{\( (?: (?>[^()]+) | (?p{$re}) )* \)}x;
+
+       The (?p{...}) item interpolates Perl code at run time, and in this case
+       refers  recursively to the pattern in which it appears. Obviously, PCRE
+       cannot support the interpolation of Perl  code.  Instead,  it  supports
+       some  special  syntax for recursion of the entire pattern, and also for
+       individual subpattern recursion.
+
+       The special item that consists of (? followed by a number greater  than
+       zero and a closing parenthesis is a recursive call of the subpattern of
+       the given number, provided that it occurs inside that  subpattern.  (If
+       not,  it  is  a  "subroutine" call, which is described in the next sec-
+       tion.) The special item (?R) is a recursive call of the entire  regular
+       expression.
+
+       For  example,  this  PCRE pattern solves the nested parentheses problem
+       (assume the  PCRE_EXTENDED  option  is  set  so  that  white  space  is
+       ignored):
+
+         \( ( (?>[^()]+) | (?R) )* \)
+
+       First  it matches an opening parenthesis. Then it matches any number of
+       substrings which can either be a  sequence  of  non-parentheses,  or  a
+       recursive  match  of  the pattern itself (that is a correctly parenthe-
+       sized substring).  Finally there is a closing parenthesis.
+
+       If this were part of a larger pattern, you would not  want  to  recurse
+       the entire pattern, so instead you could use this:
+
+         ( \( ( (?>[^()]+) | (?1) )* \) )
+
+       We  have  put the pattern into parentheses, and caused the recursion to
+       refer to them instead of the whole pattern. In a larger pattern,  keep-
+       ing  track  of parenthesis numbers can be tricky. It may be more conve-
+       nient to use named parentheses instead. For this, PCRE uses  (?P>name),
+       which  is  an  extension  to the Python syntax that PCRE uses for named
+       parentheses (Perl does not provide named parentheses). We could rewrite
+       the above example as follows:
+
+         (?P<pn> \( ( (?>[^()]+) | (?P>pn) )* \) )
+
+       This  particular example pattern contains nested unlimited repeats, and
+       so the use of atomic grouping for matching strings  of  non-parentheses
+       is  important  when  applying the pattern to strings that do not match.
+       For example, when this pattern is applied to
+
+         (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
+
+       it yields "no match" quickly. However, if atomic grouping is not  used,
+       the  match  runs  for a very long time indeed because there are so many
+       different ways the + and * repeats can carve up the  subject,  and  all
+       have to be tested before failure can be reported.
+
+       At the end of a match, the values set for any capturing subpatterns are
+       those from the outermost level of the recursion at which the subpattern
+       value  is  set.   If  you want to obtain intermediate values, a callout
+       function can be used (see below and the pcrecallout documentation).  If
+       the pattern above is matched against
+
+         (ab(cd)ef)
+
+       the  value  for  the  capturing  parentheses is "ef", which is the last
+       value taken on at the top level. If additional parentheses  are  added,
+       giving
+
+         \( ( ( (?>[^()]+) | (?R) )* ) \)
+            ^                        ^
+            ^                        ^
+
+       the  string  they  capture is "ab(cd)ef", the contents of the top level
+       parentheses. If there are more than 15 capturing parentheses in a  pat-
+       tern, PCRE has to obtain extra memory to store data during a recursion,
+       which it does by using pcre_malloc, freeing  it  via  pcre_free  after-
+       wards.  If  no  memory  can  be  obtained,  the  match  fails  with the
+       PCRE_ERROR_NOMEMORY error.
+
+       Do not confuse the (?R) item with the condition (R),  which  tests  for
+       recursion.   Consider  this pattern, which matches text in angle brack-
+       ets, allowing for arbitrary nesting. Only digits are allowed in  nested
+       brackets  (that is, when recursing), whereas any characters are permit-
+       ted at the outer level.
+
+         < (?: (?(R) \d++  | [^<>]*+) | (?R)) * >
+
+       In this pattern, (?(R) is the start of a conditional  subpattern,  with
+       two  different  alternatives for the recursive and non-recursive cases.
+       The (?R) item is the actual recursive call.
+
+
+SUBPATTERNS AS SUBROUTINES
+
+       If the syntax for a recursive subpattern reference (either by number or
+       by  name)  is used outside the parentheses to which it refers, it oper-
+       ates like a subroutine in a programming language.  An  earlier  example
+       pointed out that the pattern
+
+         (sens|respons)e and \1ibility
+
+       matches  "sense and sensibility" and "response and responsibility", but
+       not "sense and responsibility". If instead the pattern
+
+         (sens|respons)e and (?1)ibility
+
+       is used, it does match "sense and responsibility" as well as the  other
+       two  strings.  Such  references must, however, follow the subpattern to
+       which they refer.
+
+
+CALLOUTS
+
+       Perl has a feature whereby using the sequence (?{...}) causes arbitrary
+       Perl  code to be obeyed in the middle of matching a regular expression.
+       This makes it possible, amongst other things, to extract different sub-
+       strings that match the same pair of parentheses when there is a repeti-
+       tion.
+
+       PCRE provides a similar feature, but of course it cannot obey arbitrary
+       Perl code. The feature is called "callout". The caller of PCRE provides
+       an external function by putting its entry point in the global  variable
+       pcre_callout.   By default, this variable contains NULL, which disables
+       all calling out.
+
+       Within a regular expression, (?C) indicates the  points  at  which  the
+       external  function  is  to be called. If you want to identify different
+       callout points, you can put a number less than 256 after the letter  C.
+       The  default  value is zero.  For example, this pattern has two callout
+       points:
+
+         (?C1)abc(?C2)def
+
+       During matching, when PCRE reaches a callout point (and pcre_callout is
+       set),  the  external function is called. It is provided with the number
+       of the callout, and, optionally, one item of data  originally  supplied
+       by  the  caller of pcre_exec(). The callout function may cause matching
+       to backtrack, or to fail altogether.  A  complete  description  of  the
+       interface  to the callout function is given in the pcrecallout documen-
+       tation.
+
+Last updated: 03 February 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+PCRE PERFORMANCE
+
+       Certain  items  that may appear in regular expression patterns are more
+       efficient than others. It is more efficient to use  a  character  class
+       like  [aeiou]  than  a set of alternatives such as (a|e|i|o|u). In gen-
+       eral, the simplest construction that provides the required behaviour is
+       usually  the  most  efficient.  Jeffrey Friedl's book contains a lot of
+       discussion about optimizing regular expressions for  efficient  perfor-
+       mance.
+
+       When  a  pattern  begins  with .* not in parentheses, or in parentheses
+       that are not the subject of a backreference, and the PCRE_DOTALL option
+       is  set, the pattern is implicitly anchored by PCRE, since it can match
+       only at the start of a subject string. However, if PCRE_DOTALL  is  not
+       set,  PCRE  cannot  make this optimization, because the . metacharacter
+       does not then match a newline, and if the subject string contains  new-
+       lines,  the  pattern may match from the character immediately following
+       one of them instead of from the very start. For example, the pattern
+
+         .*second
+
+       matches the subject "first\nand second" (where \n stands for a  newline
+       character),  with the match starting at the seventh character. In order
+       to do this, PCRE has to retry the match starting after every newline in
+       the subject.
+
+       If  you  are using such a pattern with subject strings that do not con-
+       tain newlines, the best performance is obtained by setting PCRE_DOTALL,
+       or  starting  the pattern with ^.* to indicate explicit anchoring. That
+       saves PCRE from having to scan along the subject looking for a  newline
+       to restart at.
+
+       Beware  of  patterns  that contain nested indefinite repeats. These can
+       take a long time to run when applied to a string that does  not  match.
+       Consider the pattern fragment
+
+         (a+)*
+
+       This  can  match "aaaa" in 33 different ways, and this number increases
+       very rapidly as the string gets longer. (The * repeat can match  0,  1,
+       2,  3,  or  4  times,  and  for each of those cases other than 0, the +
+       repeats can match different numbers of times.) When  the  remainder  of
+       the pattern is such that the entire match is going to fail, PCRE has in
+       principle to try  every  possible  variation,  and  this  can  take  an
+       extremely long time.
+
+       An optimization catches some of the more simple cases such as
+
+         (a+)*b
+
+       where  a  literal  character  follows. Before embarking on the standard
+       matching procedure, PCRE checks that there is a "b" later in  the  sub-
+       ject  string, and if there is not, it fails the match immediately. How-
+       ever, when there is no following literal this  optimization  cannot  be
+       used. You can see the difference by comparing the behaviour of
+
+         (a+)*\d
+
+       with  the  pattern  above.  The former gives a failure almost instantly
+       when applied to a whole line of  "a"  characters,  whereas  the  latter
+       takes an appreciable time with strings longer than about 20 characters.
+
+Last updated: 03 February 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions.
+
+SYNOPSIS OF POSIX API
+       #include <pcreposix.h>
+
+       int regcomp(regex_t *preg, const char *pattern,
+            int cflags);
+
+       int regexec(regex_t *preg, const char *string,
+            size_t nmatch, regmatch_t pmatch[], int eflags);
+
+       size_t regerror(int errcode, const regex_t *preg,
+            char *errbuf, size_t errbuf_size);
+
+       void regfree(regex_t *preg);
+
+
+DESCRIPTION
+
+       This  set  of  functions provides a POSIX-style API to the PCRE regular
+       expression package. See the pcreapi documentation for a description  of
+       the native API, which contains additional functionality.
+
+       The functions described here are just wrapper functions that ultimately
+       call  the  PCRE  native  API.  Their  prototypes  are  defined  in  the
+       pcreposix.h  header  file,  and  on  Unix systems the library itself is
+       called pcreposix.a, so can be accessed by  adding  -lpcreposix  to  the
+       command  for  linking an application which uses them. Because the POSIX
+       functions call the native ones, it is also necessary to add -lpcre.
+
+       I have implemented only those option bits that can be reasonably mapped
+       to  PCRE  native  options.  In  addition,  the options REG_EXTENDED and
+       REG_NOSUB are defined with the value zero. They  have  no  effect,  but
+       since  programs that are written to the POSIX interface often use them,
+       this makes it easier to slot in PCRE as a  replacement  library.  Other
+       POSIX options are not even defined.
+
+       When  PCRE  is  called  via these functions, it is only the API that is
+       POSIX-like in style. The syntax and semantics of  the  regular  expres-
+       sions  themselves  are  still  those of Perl, subject to the setting of
+       various PCRE options, as described below. "POSIX-like in  style"  means
+       that  the  API  approximates  to  the POSIX definition; it is not fully
+       POSIX-compatible, and in multi-byte encoding  domains  it  is  probably
+       even less compatible.
+
+       The  header for these functions is supplied as pcreposix.h to avoid any
+       potential clash with other POSIX  libraries.  It  can,  of  course,  be
+       renamed or aliased as regex.h, which is the "correct" name. It provides
+       two structure types, regex_t for  compiled  internal  forms,  and  reg-
+       match_t  for  returning  captured substrings. It also defines some con-
+       stants whose names start  with  "REG_";  these  are  used  for  setting
+       options and identifying error codes.
+
+
+COMPILING A PATTERN
+
+       The  function regcomp() is called to compile a pattern into an internal
+       form. The pattern is a C string terminated by a  binary  zero,  and  is
+       passed  in  the  argument  pattern. The preg argument is a pointer to a
+       regex_t structure which is used as a base for storing information about
+       the compiled expression.
+
+       The argument cflags is either zero, or contains one or more of the bits
+       defined by the following macros:
+
+         REG_ICASE
+
+       The PCRE_CASELESS option is set when the expression is passed for  com-
+       pilation to the native function.
+
+         REG_NEWLINE
+
+       The PCRE_MULTILINE option is set when the expression is passed for com-
+       pilation to the native function. Note that  this  does  not  mimic  the
+       defined POSIX behaviour for REG_NEWLINE (see the following section).
+
+       In  the  absence  of  these  flags, no options are passed to the native
+       function.  This means the the  regex  is  compiled  with  PCRE  default
+       semantics.  In particular, the way it handles newline characters in the
+       subject string is the Perl way, not the POSIX way.  Note  that  setting
+       PCRE_MULTILINE  has only some of the effects specified for REG_NEWLINE.
+       It does not affect the way newlines are matched by . (they  aren't)  or
+       by a negative class such as [^a] (they are).
+
+       The  yield of regcomp() is zero on success, and non-zero otherwise. The
+       preg structure is filled in on success, and one member of the structure
+       is  public: re_nsub contains the number of capturing subpatterns in the
+       regular expression. Various error codes are defined in the header file.
+
+
+MATCHING NEWLINE CHARACTERS
+
+       This area is not simple, because POSIX and Perl take different views of
+       things.  It is not possible to get PCRE to obey  POSIX  semantics,  but
+       then  PCRE was never intended to be a POSIX engine. The following table
+       lists the different possibilities for matching  newline  characters  in
+       PCRE:
+
+                                 Default   Change with
+
+         . matches newline          no     PCRE_DOTALL
+         newline matches [^a]       yes    not changeable
+         $ matches \n at end        yes    PCRE_DOLLARENDONLY
+         $ matches \n in middle     no     PCRE_MULTILINE
+         ^ matches \n in middle     no     PCRE_MULTILINE
+
+       This is the equivalent table for POSIX:
+
+                                 Default   Change with
+
+         . matches newline          yes      REG_NEWLINE
+         newline matches [^a]       yes      REG_NEWLINE
+         $ matches \n at end        no       REG_NEWLINE
+         $ matches \n in middle     no       REG_NEWLINE
+         ^ matches \n in middle     no       REG_NEWLINE
+
+       PCRE's behaviour is the same as Perl's, except that there is no equiva-
+       lent for PCRE_DOLLARENDONLY in Perl. In both PCRE and Perl, there is no
+       way to stop newline from matching [^a].
+
+       The   default  POSIX  newline  handling  can  be  obtained  by  setting
+       PCRE_DOTALL and PCRE_DOLLARENDONLY, but there is no way  to  make  PCRE
+       behave exactly as for the REG_NEWLINE action.
+
+
+MATCHING A PATTERN
+
+       The  function  regexec() is called to match a pre-compiled pattern preg
+       against a given string, which is terminated by a zero byte, subject  to
+       the options in eflags. These can be:
+
+         REG_NOTBOL
+
+       The PCRE_NOTBOL option is set when calling the underlying PCRE matching
+       function.
+
+         REG_NOTEOL
+
+       The PCRE_NOTEOL option is set when calling the underlying PCRE matching
+       function.
+
+       The  portion of the string that was matched, and also any captured sub-
+       strings, are returned via the pmatch argument, which points to an array
+       of  nmatch  structures of type regmatch_t, containing the members rm_so
+       and rm_eo. These contain the offset to the first character of each sub-
+       string and the offset to the first character after the end of each sub-
+       string, respectively. The 0th element of  the  vector  relates  to  the
+       entire  portion  of string that was matched; subsequent elements relate
+       to the capturing subpatterns of the regular expression. Unused  entries
+       in the array have both structure members set to -1.
+
+       A  successful  match  yields  a  zero  return;  various error codes are
+       defined in the header file, of  which  REG_NOMATCH  is  the  "expected"
+       failure code.
+
+
+ERROR MESSAGES
+
+       The regerror() function maps a non-zero errorcode from either regcomp()
+       or regexec() to a printable message. If preg is  not  NULL,  the  error
+       should have arisen from the use of that structure. A message terminated
+       by a binary zero is placed  in  errbuf.  The  length  of  the  message,
+       including  the  zero, is limited to errbuf_size. The yield of the func-
+       tion is the size of buffer needed to hold the whole message.
+
+
+STORAGE
+
+       Compiling a regular expression causes memory to be allocated and  asso-
+       ciated  with  the preg structure. The function regfree() frees all such
+       memory, after which preg may no longer be used as  a  compiled  expres-
+       sion.
+
+
+AUTHOR
+
+       Philip Hazel <ph10@cam.ac.uk>
+       University Computing Service,
+       Cambridge CB2 3QG, England.
+
+Last updated: 03 February 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
+PCRE(3)                                                                PCRE(3)
+
+
+
+NAME
+       PCRE - Perl-compatible regular expressions
+
+PCRE SAMPLE PROGRAM
+
+       A simple, complete demonstration program, to get you started with using
+       PCRE, is supplied in the file pcredemo.c in the PCRE distribution.
+
+       The program compiles the regular expression that is its first argument,
+       and  matches  it  against the subject string in its second argument. No
+       PCRE options are set, and default character tables are used. If  match-
+       ing  succeeds,  the  program  outputs  the  portion of the subject that
+       matched, together with the contents of any captured substrings.
+
+       If the -g option is given on the command line, the program then goes on
+       to check for further matches of the same regular expression in the same
+       subject string. The logic is a little bit tricky because of the  possi-
+       bility  of  matching an empty string. Comments in the code explain what
+       is going on.
+
+       On a Unix system that has PCRE installed in /usr/local, you can compile
+       the demonstration program using a command like this:
+
+         gcc -o pcredemo pcredemo.c -I/usr/local/include \
+             -L/usr/local/lib -lpcre
+
+       Then you can run simple tests like this:
+
+         ./pcredemo 'cat|dog' 'the cat sat on the mat'
+         ./pcredemo -g 'cat|dog' 'the dog sat on the cat'
+
+       Note  that  there  is  a  much  more comprehensive test program, called
+       pcretest, which supports  many  more  facilities  for  testing  regular
+       expressions and the PCRE library. The pcredemo program is provided as a
+       simple coding example.
+
+       On some operating systems (e.g. Solaris) you may get an error like this
+       when you try to run pcredemo:
+
+         ld.so.1:  a.out:  fatal:  libpcre.so.0:  open failed: No such file or
+       directory
+
+       This is caused by the way shared library support works  on  those  sys-
+       tems. You need to add
+
+         -R/usr/local/lib
+
+       to the compile command to get round this problem.
+
+Last updated: 28 January 2003
+Copyright (c) 1997-2003 University of Cambridge.
+-----------------------------------------------------------------------------
+
diff --git a/external-libs/pcre/doc/pcre_compile.3 b/external-libs/pcre/doc/pcre_compile.3
new file mode 100644
index 00000000..a8273151
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_compile.3
@@ -0,0 +1,59 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B pcre *pcre_compile(const char *\fIpattern\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR, int *\fIerroffset\fR,
+.ti +5n
+.B const unsigned char *\fItableptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function compiles a regular expression into an internal form. Its
+arguments are:
+
+  \fIpattern\fR       A zero-terminated string containing the
+                  regular expression to be compiled
+  \fIoptions\fR       Zero or more option bits
+  \fIerrptr\fR        Where to put an error message
+  \fIerroffset\fR     Offset in pattern where error was found
+  \fItableptr\fR      Pointer to character tables, or NULL to
+                  use the built-in default
+
+The option bits are:
+
+  PCRE_ANCHORED         Force pattern anchoring
+  PCRE_CASELESS         Do caseless matching
+  PCRE_DOLLAR_ENDONLY   $ not to match newline at end
+  PCRE_DOTALL           . matches anything including NL
+  PCRE_EXTENDED         Ignore whitespace and # comments
+  PCRE_EXTRA            PCRE extra features
+                          (not much use currently)
+  PCRE_MULTILINE        ^ and $ match newlines within data
+  PCRE_NO_AUTO_CAPTURE  Disable numbered capturing paren-
+                          theses (named ones available)
+  PCRE_UNGREEDY         Invert greediness of quantifiers
+  PCRE_UTF8             Run in UTF-8 mode
+  PCRE_NO_UTF8_CHECK    Do not check the pattern for UTF-8
+                          validity (only relevant if
+                          PCRE_UTF8 is set)
+
+PCRE must be compiled with UTF-8 support in order to use PCRE_UTF8
+(or PCRE_NO_UTF8_CHECK).
+
+The yield of the function is a pointer to a private data structure that
+contains the compiled pattern, or NULL if an error was detected.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_config.3 b/external-libs/pcre/doc/pcre_config.3
new file mode 100644
index 00000000..3a0e6998
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_config.3
@@ -0,0 +1,45 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_config(int \fIwhat\fR, void *\fIwhere\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function makes it possible for a client program to find out which optional
+features are available in the version of the PCRE library it is using. Its
+arguments are as follows:
+
+  \fIwhat\fR     A code specifying what information is required
+  \fIwhere\fR    Points to where to put the data
+
+The available codes are:
+
+  PCRE_CONFIG_LINK_SIZE     Internal link size: 2, 3, or 4
+  PCRE_CONFIG_MATCH_LIMIT   Internal resource limit
+  PCRE_CONFIG_NEWLINE       Value of the newline character
+  PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+                            Threshold of return slots, above
+                              which \fBmalloc()\fR is used by
+                              the POSIX API
+  PCRE_CONFIG_STACKRECURSE  Recursion implementation (1=stack 0=heap)
+  PCRE_CONFIG_UTF8          Availability of UTF-8 support (1=yes 0=no)
+
+The function yields 0 on success or PCRE_ERROR_BADOPTION otherwise.
+
+There is a complete description of the PCRE native API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page, and a description of the POSIX API in the
+.\" HREF
+\fBpcreposix\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_copy_named_substring.3 b/external-libs/pcre/doc/pcre_copy_named_substring.3
new file mode 100644
index 00000000..915bd0a5
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_copy_named_substring.3
@@ -0,0 +1,40 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_copy_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B char *\fIbuffer\fR, int \fIbuffersize\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a captured substring, identified
+by name, into a given buffer. The arguments are:
+
+  \fIcode\fR          Pattern that was successfully matched
+  \fIsubject\fR       Subject that has been successfully matched
+  \fIovector\fR       Offset vector that \fBpcre_exec()\fR used
+  \fIstringcount\fR   Value returned by \fBpcre_exec()\fR
+  \fIstringname\fR    Name of the required substring
+  \fIbuffer\fR        Buffer to receive the string
+  \fIbuffersize\fR    Size of buffer
+
+The yield is the length of the substring, PCRE_ERROR_NOMEMORY if the buffer was
+too small, or PCRE_ERROR_NOSUBSTRING if the string name is invalid.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_copy_substring.3 b/external-libs/pcre/doc/pcre_copy_substring.3
new file mode 100644
index 00000000..d61b99bf
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_copy_substring.3
@@ -0,0 +1,37 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_copy_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR, char *\fIbuffer\fR,
+.ti +5n
+.B int \fIbuffersize\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a captured substring into a given
+buffer. The arguments are:
+
+  \fIsubject\fR       Subject that has been successfully matched
+  \fIovector\fR       Offset vector that \fBpcre_exec()\fR used
+  \fIstringcount\fR   Value returned by \fBpcre_exec()\fR
+  \fIstringnumber\fR  Number of the required substring
+  \fIbuffer\fR        Buffer to receive the string
+  \fIbuffersize\fR    Size of buffer
+
+The yield is the legnth of the string, PCRE_ERROR_NOMEMORY if the buffer was
+too small, or PCRE_ERROR_NOSUBSTRING if the string number is invalid.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_exec.3 b/external-libs/pcre/doc/pcre_exec.3
new file mode 100644
index 00000000..0d6c3805
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_exec.3
@@ -0,0 +1,48 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_exec(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B "const char *\fIsubject\fR," int \fIlength\fR, int \fIstartoffset\fR,
+.ti +5n
+.B int \fIoptions\fR, int *\fIovector\fR, int \fIovecsize\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function matches a compiled regular expression against a given subject
+string, and returns offsets to capturing subexpressions. Its arguments are:
+
+  \fIcode\fR         Points to the compiled pattern
+  \fIextra\fR        Points to an associated \fBpcre_extra\fR structure,
+                 or is NULL
+  \fIsubject\fR      Points to the subject string
+  \fIlength\fR       Length of the subject string, in bytes
+  \fIstartoffset\fR  Offset in bytes in the subject at which to
+                 start matching
+  \fIoptions\fR      Option bits
+  \fIovector\fR      Points to a vector of ints for result offsets
+  \fIovecsize\fR     Size of the vector (a multiple of 3)
+
+The options are:
+
+  PCRE_ANCHORED      Match only at the first position
+  PCRE_NOTBOL        Subject is not the beginning of a line
+  PCRE_NOTEOL        Subject is not the end of a line
+  PCRE_NOTEMPTY      An empty string is not a valid match
+  PCRE_NO_UTF8_CHECK Do not check the subject for UTF-8
+                       validity (only relevant if PCRE_UTF8
+                       was set at compile time)
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_free_substring.3 b/external-libs/pcre/doc/pcre_free_substring.3
new file mode 100644
index 00000000..3fcaf117
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_free_substring.3
@@ -0,0 +1,24 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B void pcre_free_substring(const char *\fIstringptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for freeing the store obtained by a previous
+call to \fBpcre_get_substring()\fR or \fBpcre_get_named_substring()\fR. Its
+only argument is a pointer to the string.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_free_substring_list.3 b/external-libs/pcre/doc/pcre_free_substring_list.3
new file mode 100644
index 00000000..73d5993d
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_free_substring_list.3
@@ -0,0 +1,24 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B void pcre_free_substring_list(const char **\fIstringptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for freeing the store obtained by a previous
+call to \fBpcre_get_substring_list()\fR. Its only argument is a pointer to the
+list of string pointers.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_fullinfo.3 b/external-libs/pcre/doc/pcre_fullinfo.3
new file mode 100644
index 00000000..06de985f
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_fullinfo.3
@@ -0,0 +1,53 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_fullinfo(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B int \fIwhat\fR, void *\fIwhere\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function returns information about a compiled pattern. Its arguments are:
+
+  \fIcode\fR    Compiled regular expression
+  \fIextra\fR   Result of \fBpcre_study()\fR or NULL
+  \fIwhat\fR    What information is required
+  \fIwhere\fR   Where to put the information
+
+The following information is available:
+
+  PCRE_INFO_BACKREFMAX     Number of highest back reference
+  PCRE_INFO_CAPTURECOUNT   Number of capturing subpatterns
+  PCRE_INFO_FIRSTBYTE      Fixed first byte for a match, or
+                             -1 for start of string
+                                or after newline, or
+                             -2 otherwise
+  PCRE_INFO_FIRSTTABLE     Table of first bytes
+                             (after studying)
+  PCRE_INFO_LASTLITERAL    Literal last byte required
+  PCRE_INFO_NAMECOUNT      Number of named subpatterns
+  PCRE_INFO_NAMEENTRYSIZE  Size of name table entry
+  PCRE_INFO_NAMETABLE      Pointer to name table
+  PCRE_INFO_OPTIONS        Options used for compilation
+  PCRE_INFO_SIZE           Size of compiled pattern
+
+The yield of the function is zero on success or:
+
+  PCRE_ERROR_NULL       the argument \fIcode\fR was NULL
+                        the argument \fIwhere\fR was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+  PCRE_ERROR_BADOPTION  the value of \fIwhat\fR was invalid
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_get_named_substring.3 b/external-libs/pcre/doc/pcre_get_named_substring.3
new file mode 100644
index 00000000..6d3f80ea
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_get_named_substring.3
@@ -0,0 +1,40 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_get_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a captured substring by name. The
+arguments are:
+
+  \fIcode\fR          Compiled pattern
+  \fIsubject\fR       Subject that has been successfully matched
+  \fIovector\fR       Offset vector that \fBpcre_exec()\fR used
+  \fIstringcount\fR   Value returned by \fBpcre_exec()\fR
+  \fIstringname\fR    Name of the required substring
+  \fIstringptr\fR     Where to put the string pointer
+
+The yield is the length of the extracted substring, PCRE_ERROR_NOMEMORY if
+sufficient memory could not be obtained, or PCRE_ERROR_NOSUBSTRING if the
+string name is invalid.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_get_stringnumber.3 b/external-libs/pcre/doc/pcre_get_stringnumber.3
new file mode 100644
index 00000000..f6c9357f
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_get_stringnumber.3
@@ -0,0 +1,31 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_get_stringnumber(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIname\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This convenience function finds the number of a named substring capturing
+parenthesis in a compiled pattern. Its arguments are:
+
+  \fIcode\fR    Compiled regular expression
+  \fIname\fR    Name whose number is required
+
+The yield of the function is the number of the parenthesis if the name is
+found, or PCRE_ERROR_NOSUBSTRING otherwise.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_get_substring.3 b/external-libs/pcre/doc/pcre_get_substring.3
new file mode 100644
index 00000000..4c92c9c5
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_get_substring.3
@@ -0,0 +1,37 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_get_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a captured substring. The
+arguments are:
+
+  \fIsubject\fR       Subject that has been successfully matched
+  \fIovector\fR       Offset vector that \fBpcre_exec()\fR used
+  \fIstringcount\fR   Value returned by \fBpcre_exec()\fR
+  \fIstringnumber\fR  Number of the required substring
+  \fIstringptr\fR     Where to put the string pointer
+
+The yield is the length of the substring, PCRE_ERROR_NOMEMORY if sufficient
+memory could not be obtained, or PCRE_ERROR_NOSUBSTRING if the string number is
+invalid.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_get_substring_list.3 b/external-libs/pcre/doc/pcre_get_substring_list.3
new file mode 100644
index 00000000..69090e1b
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_get_substring_list.3
@@ -0,0 +1,33 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_get_substring_list(const char *\fIsubject\fR,
+.ti +5n
+.B int *\fIovector\fR, int \fIstringcount\fR, "const char ***\fIlistptr\fR);"
+
+.SH DESCRIPTION
+.rs
+.sp
+This is a convenience function for extracting a list of all the captured
+substrings. The arguments are:
+
+  \fIsubject\fR       Subject that has been successfully matched
+  \fIovector\fR       Offset vector that \fBpcre_exec\fR used
+  \fIstringcount\fR   Value returned by \fBpcre_exec\fR
+  \fIlistptr\fR       Where to put a pointer to the list
+
+The yield is zero on success or PCRE_ERROR_NOMEMORY if sufficient memory could
+not be obtained.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_info.3 b/external-libs/pcre/doc/pcre_info.3
new file mode 100644
index 00000000..c4970764
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_info.3
@@ -0,0 +1,23 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B int pcre_info(const pcre *\fIcode\fR, int *\fIoptptr\fR, int
+.B *\fIfirstcharptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function is obsolete. You should be using \fBpcre_fullinfo()\fR instead.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_maketables.3 b/external-libs/pcre/doc/pcre_maketables.3
new file mode 100644
index 00000000..7d459ed4
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_maketables.3
@@ -0,0 +1,26 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B const unsigned char *pcre_maketables(void);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function builds a set of character tables which can be passed to
+\fBpcre_compile()\fR to override PCRE's internal, built-in tables (which were
+made by \fBpcre_maketables()\fR when PCRE was compiled). You might want to do
+this if you are using a non-standard locale. The function yields a pointer to
+the tables.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_study.3 b/external-libs/pcre/doc/pcre_study.3
new file mode 100644
index 00000000..69ff20e4
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_study.3
@@ -0,0 +1,36 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B pcre_extra *pcre_study(const pcre *\fIcode\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function studies a compiled pattern, to see if additional information can
+be extracted that might speed up matching. Its arguments are:
+
+  \fIcode\fR       A compiled regular expression
+  \fIoptions\fR    Options for \fBpcre_study()\fR
+  \fIerrptr\fR     Where to put an error message
+
+If the function returns NULL, either it could not find any additional
+information, or there was an error. You can tell the difference by looking at
+the error value. It is NULL in first case.
+
+There are currently no options defined; the value of the second argument should
+always be zero.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcre_version.3 b/external-libs/pcre/doc/pcre_version.3
new file mode 100644
index 00000000..6f981224
--- /dev/null
+++ b/external-libs/pcre/doc/pcre_version.3
@@ -0,0 +1,23 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B char *pcre_version(void);
+
+.SH DESCRIPTION
+.rs
+.sp
+This function returns a character string that gives the version number of the
+PCRE library, and its date of release.
+
+There is a complete description of the PCRE API in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page.
diff --git a/external-libs/pcre/doc/pcreapi.3 b/external-libs/pcre/doc/pcreapi.3
new file mode 100644
index 00000000..4c7d43c3
--- /dev/null
+++ b/external-libs/pcre/doc/pcreapi.3
@@ -0,0 +1,1082 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH SYNOPSIS OF PCRE API
+.rs
+.sp
+.B #include <pcre.h>
+.PP
+.SM
+.br
+.B pcre *pcre_compile(const char *\fIpattern\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR, int *\fIerroffset\fR,
+.ti +5n
+.B const unsigned char *\fItableptr\fR);
+.PP
+.br
+.B pcre_extra *pcre_study(const pcre *\fIcode\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR);
+.PP
+.br
+.B int pcre_exec(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B "const char *\fIsubject\fR," int \fIlength\fR, int \fIstartoffset\fR,
+.ti +5n
+.B int \fIoptions\fR, int *\fIovector\fR, int \fIovecsize\fR);
+.PP
+.br
+.B int pcre_copy_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B char *\fIbuffer\fR, int \fIbuffersize\fR);
+.PP
+.br
+.B int pcre_copy_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR, char *\fIbuffer\fR,
+.ti +5n
+.B int \fIbuffersize\fR);
+.PP
+.br
+.B int pcre_get_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+.PP
+.br
+.B int pcre_get_stringnumber(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIname\fR);
+.PP
+.br
+.B int pcre_get_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+.PP
+.br
+.B int pcre_get_substring_list(const char *\fIsubject\fR,
+.ti +5n
+.B int *\fIovector\fR, int \fIstringcount\fR, "const char ***\fIlistptr\fR);"
+.PP
+.br
+.B void pcre_free_substring(const char *\fIstringptr\fR);
+.PP
+.br
+.B void pcre_free_substring_list(const char **\fIstringptr\fR);
+.PP
+.br
+.B const unsigned char *pcre_maketables(void);
+.PP
+.br
+.B int pcre_fullinfo(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B int \fIwhat\fR, void *\fIwhere\fR);
+.PP
+.br
+.B int pcre_info(const pcre *\fIcode\fR, int *\fIoptptr\fR, int
+.B *\fIfirstcharptr\fR);
+.PP
+.br
+.B int pcre_config(int \fIwhat\fR, void *\fIwhere\fR);
+.PP
+.br
+.B char *pcre_version(void);
+.PP
+.br
+.B void *(*pcre_malloc)(size_t);
+.PP
+.br
+.B void (*pcre_free)(void *);
+.PP
+.br
+.B void *(*pcre_stack_malloc)(size_t);
+.PP
+.br
+.B void (*pcre_stack_free)(void *);
+.PP
+.br
+.B int (*pcre_callout)(pcre_callout_block *);
+
+.SH PCRE API
+.rs
+.sp
+PCRE has its own native API, which is described in this document. There is also
+a set of wrapper functions that correspond to the POSIX regular expression API.
+These are described in the \fBpcreposix\fR documentation.
+
+The native API function prototypes are defined in the header file \fBpcre.h\fR,
+and on Unix systems the library itself is called \fBlibpcre.a\fR, so can be
+accessed by adding \fB-lpcre\fR to the command for linking an application which
+calls it. The header file defines the macros PCRE_MAJOR and PCRE_MINOR to
+contain the major and minor release numbers for the library. Applications can
+use these to include support for different releases.
+
+The functions \fBpcre_compile()\fR, \fBpcre_study()\fR, and \fBpcre_exec()\fR
+are used for compiling and matching regular expressions. A sample program that
+demonstrates the simplest way of using them is given in the file
+\fIpcredemo.c\fR. The \fBpcresample\fR documentation describes how to run it.
+
+There are convenience functions for extracting captured substrings from a
+matched subject string. They are:
+
+  \fBpcre_copy_substring()\fR
+  \fBpcre_copy_named_substring()\fR
+  \fBpcre_get_substring()\fR
+  \fBpcre_get_named_substring()\fR
+  \fBpcre_get_substring_list()\fR
+
+\fBpcre_free_substring()\fR and \fBpcre_free_substring_list()\fR are also
+provided, to free the memory used for extracted strings.
+
+The function \fBpcre_maketables()\fR is used (optionally) to build a set of
+character tables in the current locale for passing to \fBpcre_compile()\fR.
+
+The function \fBpcre_fullinfo()\fR is used to find out information about a
+compiled pattern; \fBpcre_info()\fR is an obsolete version which returns only
+some of the available information, but is retained for backwards compatibility.
+The function \fBpcre_version()\fR returns a pointer to a string containing the
+version of PCRE and its date of release.
+
+The global variables \fBpcre_malloc\fR and \fBpcre_free\fR initially contain
+the entry points of the standard \fBmalloc()\fR and \fBfree()\fR functions
+respectively. PCRE calls the memory management functions via these variables,
+so a calling program can replace them if it wishes to intercept the calls. This
+should be done before calling any PCRE functions.
+
+The global variables \fBpcre_stack_malloc\fR and \fBpcre_stack_free\fR are also
+indirections to memory management functions. These special functions are used
+only when PCRE is compiled to use the heap for remembering data, instead of
+recursive function calls. This is a non-standard way of building PCRE, for use
+in environments that have limited stacks. Because of the greater use of memory
+management, it runs more slowly. Separate functions are provided so that
+special-purpose external code can be used for this case. When used, these
+functions are always called in a stack-like manner (last obtained, first
+freed), and always for memory blocks of the same size.
+
+The global variable \fBpcre_callout\fR initially contains NULL. It can be set
+by the caller to a "callout" function, which PCRE will then call at specified
+points during a matching operation. Details are given in the \fBpcrecallout\fR
+documentation.
+
+.SH MULTITHREADING
+.rs
+.sp
+The PCRE functions can be used in multi-threading applications, with the
+proviso that the memory management functions pointed to by \fBpcre_malloc\fR,
+\fBpcre_free\fR, \fBpcre_stack_malloc\fR, and \fBpcre_stack_free\fR, and the
+callout function pointed to by \fBpcre_callout\fR, are shared by all threads.
+
+The compiled form of a regular expression is not altered during matching, so
+the same compiled pattern can safely be used by several threads at once.
+
+.SH CHECKING BUILD-TIME OPTIONS
+.rs
+.sp
+.B int pcre_config(int \fIwhat\fR, void *\fIwhere\fR);
+.PP
+The function \fBpcre_config()\fR makes it possible for a PCRE client to
+discover which optional features have been compiled into the PCRE library. The
+.\" HREF
+\fBpcrebuild\fR
+.\"
+documentation has more details about these optional features.
+
+The first argument for \fBpcre_config()\fR is an integer, specifying which
+information is required; the second argument is a pointer to a variable into
+which the information is placed. The following information is available:
+
+  PCRE_CONFIG_UTF8
+
+The output is an integer that is set to one if UTF-8 support is available;
+otherwise it is set to zero.
+
+  PCRE_CONFIG_NEWLINE
+
+The output is an integer that is set to the value of the code that is used for
+the newline character. It is either linefeed (10) or carriage return (13), and
+should normally be the standard character for your operating system.
+
+  PCRE_CONFIG_LINK_SIZE
+
+The output is an integer that contains the number of bytes used for internal
+linkage in compiled regular expressions. The value is 2, 3, or 4. Larger values
+allow larger regular expressions to be compiled, at the expense of slower
+matching. The default value of 2 is sufficient for all but the most massive
+patterns, since it allows the compiled pattern to be up to 64K in size.
+
+  PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
+
+The output is an integer that contains the threshold above which the POSIX
+interface uses \fBmalloc()\fR for output vectors. Further details are given in
+the \fBpcreposix\fR documentation.
+
+  PCRE_CONFIG_MATCH_LIMIT
+
+The output is an integer that gives the default limit for the number of
+internal matching function calls in a \fBpcre_exec()\fR execution. Further
+details are given with \fBpcre_exec()\fR below.
+
+  PCRE_CONFIG_STACKRECURSE
+
+The output is an integer that is set to one if internal recursion is
+implemented by recursive function calls that use the stack to remember their
+state. This is the usual way that PCRE is compiled. The output is zero if PCRE
+was compiled to use blocks of data on the heap instead of recursive function
+calls. In this case, \fBpcre_stack_malloc\fR and \fBpcre_stack_free\fR are
+called to manage memory blocks on the heap, thus avoiding the use of the stack.
+
+.SH COMPILING A PATTERN
+.rs
+.sp
+.B pcre *pcre_compile(const char *\fIpattern\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR, int *\fIerroffset\fR,
+.ti +5n
+.B const unsigned char *\fItableptr\fR);
+.PP
+
+The function \fBpcre_compile()\fR is called to compile a pattern into an
+internal form. The pattern is a C string terminated by a binary zero, and
+is passed in the argument \fIpattern\fR. A pointer to a single block of memory
+that is obtained via \fBpcre_malloc\fR is returned. This contains the compiled
+code and related data. The \fBpcre\fR type is defined for the returned block;
+this is a typedef for a structure whose contents are not externally defined. It
+is up to the caller to free the memory when it is no longer required.
+
+Although the compiled code of a PCRE regex is relocatable, that is, it does not
+depend on memory location, the complete \fBpcre\fR data block is not
+fully relocatable, because it contains a copy of the \fItableptr\fR argument,
+which is an address (see below).
+
+The \fIoptions\fR argument contains independent bits that affect the
+compilation. It should be zero if no options are required. Some of the options,
+in particular, those that are compatible with Perl, can also be set and unset
+from within the pattern (see the detailed description of regular expressions
+in the \fBpcrepattern\fR documentation). For these options, the contents of the
+\fIoptions\fR argument specifies their initial settings at the start of
+compilation and execution. The PCRE_ANCHORED option can be set at the time of
+matching as well as at compile time.
+
+If \fIerrptr\fR is NULL, \fBpcre_compile()\fR returns NULL immediately.
+Otherwise, if compilation of a pattern fails, \fBpcre_compile()\fR returns
+NULL, and sets the variable pointed to by \fIerrptr\fR to point to a textual
+error message. The offset from the start of the pattern to the character where
+the error was discovered is placed in the variable pointed to by
+\fIerroffset\fR, which must not be NULL. If it is, an immediate error is given.
+
+If the final argument, \fItableptr\fR, is NULL, PCRE uses a default set of
+character tables which are built when it is compiled, using the default C
+locale. Otherwise, \fItableptr\fR must be the result of a call to
+\fBpcre_maketables()\fR. See the section on locale support below.
+
+This code fragment shows a typical straightforward call to \fBpcre_compile()\fR:
+
+  pcre *re;
+  const char *error;
+  int erroffset;
+  re = pcre_compile(
+    "^A.*Z",          /* the pattern */
+    0,                /* default options */
+    &error,           /* for error message */
+    &erroffset,       /* for error offset */
+    NULL);            /* use default character tables */
+
+The following option bits are defined:
+
+  PCRE_ANCHORED
+
+If this bit is set, the pattern is forced to be "anchored", that is, it is
+constrained to match only at the first matching point in the string which is
+being searched (the "subject string"). This effect can also be achieved by
+appropriate constructs in the pattern itself, which is the only way to do it in
+Perl.
+
+  PCRE_CASELESS
+
+If this bit is set, letters in the pattern match both upper and lower case
+letters. It is equivalent to Perl's /i option, and it can be changed within a
+pattern by a (?i) option setting.
+
+  PCRE_DOLLAR_ENDONLY
+
+If this bit is set, a dollar metacharacter in the pattern matches only at the
+end of the subject string. Without this option, a dollar also matches
+immediately before the final character if it is a newline (but not before any
+other newlines). The PCRE_DOLLAR_ENDONLY option is ignored if PCRE_MULTILINE is
+set. There is no equivalent to this option in Perl, and no way to set it within
+a pattern.
+
+  PCRE_DOTALL
+
+If this bit is set, a dot metacharater in the pattern matches all characters,
+including newlines. Without it, newlines are excluded. This option is
+equivalent to Perl's /s option, and it can be changed within a pattern by a
+(?s) option setting. A negative class such as [^a] always matches a newline
+character, independent of the setting of this option.
+
+  PCRE_EXTENDED
+
+If this bit is set, whitespace data characters in the pattern are totally
+ignored except when escaped or inside a character class. Whitespace does not
+include the VT character (code 11). In addition, characters between an
+unescaped # outside a character class and the next newline character,
+inclusive, are also ignored. This is equivalent to Perl's /x option, and it can
+be changed within a pattern by a (?x) option setting.
+
+This option makes it possible to include comments inside complicated patterns.
+Note, however, that this applies only to data characters. Whitespace characters
+may never appear within special character sequences in a pattern, for example
+within the sequence (?( which introduces a conditional subpattern.
+
+  PCRE_EXTRA
+
+This option was invented in order to turn on additional functionality of PCRE
+that is incompatible with Perl, but it is currently of very little use. When
+set, any backslash in a pattern that is followed by a letter that has no
+special meaning causes an error, thus reserving these combinations for future
+expansion. By default, as in Perl, a backslash followed by a letter with no
+special meaning is treated as a literal. There are at present no other features
+controlled by this option. It can also be set by a (?X) option setting within a
+pattern.
+
+  PCRE_MULTILINE
+
+By default, PCRE treats the subject string as consisting of a single "line" of
+characters (even if it actually contains several newlines). The "start of line"
+metacharacter (^) matches only at the start of the string, while the "end of
+line" metacharacter ($) matches only at the end of the string, or before a
+terminating newline (unless PCRE_DOLLAR_ENDONLY is set). This is the same as
+Perl.
+
+When PCRE_MULTILINE it is set, the "start of line" and "end of line" constructs
+match immediately following or immediately before any newline in the subject
+string, respectively, as well as at the very start and end. This is equivalent
+to Perl's /m option, and it can be changed within a pattern by a (?m) option
+setting. If there are no "\\n" characters in a subject string, or no
+occurrences of ^ or $ in a pattern, setting PCRE_MULTILINE has no effect.
+
+  PCRE_NO_AUTO_CAPTURE
+
+If this option is set, it disables the use of numbered capturing parentheses in
+the pattern. Any opening parenthesis that is not followed by ? behaves as if it
+were followed by ?: but named parentheses can still be used for capturing (and
+they acquire numbers in the usual way). There is no equivalent of this option
+in Perl.
+
+  PCRE_UNGREEDY
+
+This option inverts the "greediness" of the quantifiers so that they are not
+greedy by default, but become greedy if followed by "?". It is not compatible
+with Perl. It can also be set by a (?U) option setting within the pattern.
+
+  PCRE_UTF8
+
+This option causes PCRE to regard both the pattern and the subject as strings
+of UTF-8 characters instead of single-byte character strings. However, it is
+available only if PCRE has been built to include UTF-8 support. If not, the use
+of this option provokes an error. Details of how this option changes the
+behaviour of PCRE are given in the
+.\" HTML <a href="pcre.html#utf8support">
+.\" </a>
+section on UTF-8 support
+.\"
+in the main
+.\" HREF
+\fBpcre\fR
+.\"
+page.
+
+  PCRE_NO_UTF8_CHECK
+
+When PCRE_UTF8 is set, the validity of the pattern as a UTF-8 string is
+automatically checked. If an invalid UTF-8 sequence of bytes is found,
+\fBpcre_compile()\fR returns an error. If you already know that your pattern is
+valid, and you want to skip this check for performance reasons, you can set the
+PCRE_NO_UTF8_CHECK option. When it is set, the effect of passing an invalid
+UTF-8 string as a pattern is undefined. It may cause your program to crash.
+Note that there is a similar option for suppressing the checking of subject
+strings passed to \fBpcre_exec()\fR.
+
+
+.SH STUDYING A PATTERN
+.rs
+.sp
+.B pcre_extra *pcre_study(const pcre *\fIcode\fR, int \fIoptions\fR,
+.ti +5n
+.B const char **\fIerrptr\fR);
+.PP
+When a pattern is going to be used several times, it is worth spending more
+time analyzing it in order to speed up the time taken for matching. The
+function \fBpcre_study()\fR takes a pointer to a compiled pattern as its first
+argument. If studing the pattern produces additional information that will help
+speed up matching, \fBpcre_study()\fR returns a pointer to a \fBpcre_extra\fR
+block, in which the \fIstudy_data\fR field points to the results of the study.
+
+The returned value from a \fBpcre_study()\fR can be passed directly to
+\fBpcre_exec()\fR. However, the \fBpcre_extra\fR block also contains other
+fields that can be set by the caller before the block is passed; these are
+described below. If studying the pattern does not produce any additional
+information, \fBpcre_study()\fR returns NULL. In that circumstance, if the
+calling program wants to pass some of the other fields to \fBpcre_exec()\fR, it
+must set up its own \fBpcre_extra\fR block.
+
+The second argument contains option bits. At present, no options are defined
+for \fBpcre_study()\fR, and this argument should always be zero.
+
+The third argument for \fBpcre_study()\fR is a pointer for an error message. If
+studying succeeds (even if no data is returned), the variable it points to is
+set to NULL. Otherwise it points to a textual error message. You should
+therefore test the error pointer for NULL after calling \fBpcre_study()\fR, to
+be sure that it has run successfully.
+
+This is a typical call to \fBpcre_study\fR():
+
+  pcre_extra *pe;
+  pe = pcre_study(
+    re,             /* result of pcre_compile() */
+    0,              /* no options exist */
+    &error);        /* set to NULL or points to a message */
+
+At present, studying a pattern is useful only for non-anchored patterns that do
+not have a single fixed starting character. A bitmap of possible starting
+characters is created.
+
+.\" HTML <a name="localesupport"></a>
+.SH LOCALE SUPPORT
+.rs
+.sp
+PCRE handles caseless matching, and determines whether characters are letters,
+digits, or whatever, by reference to a set of tables. When running in UTF-8
+mode, this applies only to characters with codes less than 256. The library
+contains a default set of tables that is created in the default C locale when
+PCRE is compiled. This is used when the final argument of \fBpcre_compile()\fR
+is NULL, and is sufficient for many applications.
+
+An alternative set of tables can, however, be supplied. Such tables are built
+by calling the \fBpcre_maketables()\fR function, which has no arguments, in the
+relevant locale. The result can then be passed to \fBpcre_compile()\fR as often
+as necessary. For example, to build and use tables that are appropriate for the
+French locale (where accented characters with codes greater than 128 are
+treated as letters), the following code could be used:
+
+  setlocale(LC_CTYPE, "fr");
+  tables = pcre_maketables();
+  re = pcre_compile(..., tables);
+
+The tables are built in memory that is obtained via \fBpcre_malloc\fR. The
+pointer that is passed to \fBpcre_compile\fR is saved with the compiled
+pattern, and the same tables are used via this pointer by \fBpcre_study()\fR
+and \fBpcre_exec()\fR. Thus, for any single pattern, compilation, studying and
+matching all happen in the same locale, but different patterns can be compiled
+in different locales. It is the caller's responsibility to ensure that the
+memory containing the tables remains available for as long as it is needed.
+
+.SH INFORMATION ABOUT A PATTERN
+.rs
+.sp
+.B int pcre_fullinfo(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B int \fIwhat\fR, void *\fIwhere\fR);
+.PP
+The \fBpcre_fullinfo()\fR function returns information about a compiled
+pattern. It replaces the obsolete \fBpcre_info()\fR function, which is
+nevertheless retained for backwards compability (and is documented below).
+
+The first argument for \fBpcre_fullinfo()\fR is a pointer to the compiled
+pattern. The second argument is the result of \fBpcre_study()\fR, or NULL if
+the pattern was not studied. The third argument specifies which piece of
+information is required, and the fourth argument is a pointer to a variable
+to receive the data. The yield of the function is zero for success, or one of
+the following negative numbers:
+
+  PCRE_ERROR_NULL       the argument \fIcode\fR was NULL
+                        the argument \fIwhere\fR was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+  PCRE_ERROR_BADOPTION  the value of \fIwhat\fR was invalid
+
+Here is a typical call of \fBpcre_fullinfo()\fR, to obtain the length of the
+compiled pattern:
+
+  int rc;
+  unsigned long int length;
+  rc = pcre_fullinfo(
+    re,               /* result of pcre_compile() */
+    pe,               /* result of pcre_study(), or NULL */
+    PCRE_INFO_SIZE,   /* what is required */
+    &length);         /* where to put the data */
+
+The possible values for the third argument are defined in \fBpcre.h\fR, and are
+as follows:
+
+  PCRE_INFO_BACKREFMAX
+
+Return the number of the highest back reference in the pattern. The fourth
+argument should point to an \fBint\fR variable. Zero is returned if there are
+no back references.
+
+  PCRE_INFO_CAPTURECOUNT
+
+Return the number of capturing subpatterns in the pattern. The fourth argument
+should point to an \fbint\fR variable.
+
+  PCRE_INFO_FIRSTBYTE
+
+Return information about the first byte of any matched string, for a
+non-anchored pattern. (This option used to be called PCRE_INFO_FIRSTCHAR; the
+old name is still recognized for backwards compatibility.)
+
+If there is a fixed first byte, e.g. from a pattern such as (cat|cow|coyote),
+it is returned in the integer pointed to by \fIwhere\fR. Otherwise, if either
+
+(a) the pattern was compiled with the PCRE_MULTILINE option, and every branch
+starts with "^", or
+
+(b) every branch of the pattern starts with ".*" and PCRE_DOTALL is not set
+(if it were set, the pattern would be anchored),
+
+-1 is returned, indicating that the pattern matches only at the start of a
+subject string or after any newline within the string. Otherwise -2 is
+returned. For anchored patterns, -2 is returned.
+
+  PCRE_INFO_FIRSTTABLE
+
+If the pattern was studied, and this resulted in the construction of a 256-bit
+table indicating a fixed set of bytes for the first byte in any matching
+string, a pointer to the table is returned. Otherwise NULL is returned. The
+fourth argument should point to an \fBunsigned char *\fR variable.
+
+  PCRE_INFO_LASTLITERAL
+
+Return the value of the rightmost literal byte that must exist in any matched
+string, other than at its start, if such a byte has been recorded. The fourth
+argument should point to an \fBint\fR variable. If there is no such byte, -1 is
+returned. For anchored patterns, a last literal byte is recorded only if it
+follows something of variable length. For example, for the pattern
+/^a\\d+z\\d+/ the returned value is "z", but for /^a\\dz\\d/ the returned value
+is -1.
+
+  PCRE_INFO_NAMECOUNT
+  PCRE_INFO_NAMEENTRYSIZE
+  PCRE_INFO_NAMETABLE
+
+PCRE supports the use of named as well as numbered capturing parentheses. The
+names are just an additional way of identifying the parentheses, which still
+acquire a number. A caller that wants to extract data from a named subpattern
+must convert the name to a number in order to access the correct pointers in
+the output vector (described with \fBpcre_exec()\fR below). In order to do
+this, it must first use these three values to obtain the name-to-number mapping
+table for the pattern.
+
+The map consists of a number of fixed-size entries. PCRE_INFO_NAMECOUNT gives
+the number of entries, and PCRE_INFO_NAMEENTRYSIZE gives the size of each
+entry; both of these return an \fBint\fR value. The entry size depends on the
+length of the longest name. PCRE_INFO_NAMETABLE returns a pointer to the first
+entry of the table (a pointer to \fBchar\fR). The first two bytes of each entry
+are the number of the capturing parenthesis, most significant byte first. The
+rest of the entry is the corresponding name, zero terminated. The names are in
+alphabetical order. For example, consider the following pattern (assume
+PCRE_EXTENDED is set, so white space - including newlines - is ignored):
+
+  (?P<date> (?P<year>(\\d\\d)?\\d\\d) -
+  (?P<month>\\d\\d) - (?P<day>\\d\\d) )
+
+There are four named subpatterns, so the table has four entries, and each entry
+in the table is eight bytes long. The table is as follows, with non-printing
+bytes shows in hex, and undefined bytes shown as ??:
+
+  00 01 d  a  t  e  00 ??
+  00 05 d  a  y  00 ?? ??
+  00 04 m  o  n  t  h  00
+  00 02 y  e  a  r  00 ??
+
+When writing code to extract data from named subpatterns, remember that the
+length of each entry may be different for each compiled pattern.
+
+  PCRE_INFO_OPTIONS
+
+Return a copy of the options with which the pattern was compiled. The fourth
+argument should point to an \fBunsigned long int\fR variable. These option bits
+are those specified in the call to \fBpcre_compile()\fR, modified by any
+top-level option settings within the pattern itself.
+
+A pattern is automatically anchored by PCRE if all of its top-level
+alternatives begin with one of the following:
+
+  ^     unless PCRE_MULTILINE is set
+  \\A    always
+  \\G    always
+  .*    if PCRE_DOTALL is set and there are no back
+          references to the subpattern in which .* appears
+
+For such patterns, the PCRE_ANCHORED bit is set in the options returned by
+\fBpcre_fullinfo()\fR.
+
+  PCRE_INFO_SIZE
+
+Return the size of the compiled pattern, that is, the value that was passed as
+the argument to \fBpcre_malloc()\fR when PCRE was getting memory in which to
+place the compiled data. The fourth argument should point to a \fBsize_t\fR
+variable.
+
+  PCRE_INFO_STUDYSIZE
+
+Returns the size of the data block pointed to by the \fIstudy_data\fR field in
+a \fBpcre_extra\fR block. That is, it is the value that was passed to
+\fBpcre_malloc()\fR when PCRE was getting memory into which to place the data
+created by \fBpcre_study()\fR. The fourth argument should point to a
+\fBsize_t\fR variable.
+
+.SH OBSOLETE INFO FUNCTION
+.rs
+.sp
+.B int pcre_info(const pcre *\fIcode\fR, int *\fIoptptr\fR, int
+.B *\fIfirstcharptr\fR);
+.PP
+The \fBpcre_info()\fR function is now obsolete because its interface is too
+restrictive to return all the available data about a compiled pattern. New
+programs should use \fBpcre_fullinfo()\fR instead. The yield of
+\fBpcre_info()\fR is the number of capturing subpatterns, or one of the
+following negative numbers:
+
+  PCRE_ERROR_NULL       the argument \fIcode\fR was NULL
+  PCRE_ERROR_BADMAGIC   the "magic number" was not found
+
+If the \fIoptptr\fR argument is not NULL, a copy of the options with which the
+pattern was compiled is placed in the integer it points to (see
+PCRE_INFO_OPTIONS above).
+
+If the pattern is not anchored and the \fIfirstcharptr\fR argument is not NULL,
+it is used to pass back information about the first character of any matched
+string (see PCRE_INFO_FIRSTBYTE above).
+
+.SH MATCHING A PATTERN
+.rs
+.sp
+.B int pcre_exec(const pcre *\fIcode\fR, "const pcre_extra *\fIextra\fR,"
+.ti +5n
+.B "const char *\fIsubject\fR," int \fIlength\fR, int \fIstartoffset\fR,
+.ti +5n
+.B int \fIoptions\fR, int *\fIovector\fR, int \fIovecsize\fR);
+.PP
+The function \fBpcre_exec()\fR is called to match a subject string against a
+pre-compiled pattern, which is passed in the \fIcode\fR argument. If the
+pattern has been studied, the result of the study should be passed in the
+\fIextra\fR argument.
+
+Here is an example of a simple call to \fBpcre_exec()\fR:
+
+  int rc;
+  int ovector[30];
+  rc = pcre_exec(
+    re,             /* result of pcre_compile() */
+    NULL,           /* we didn't study the pattern */
+    "some string",  /* the subject string */
+    11,             /* the length of the subject string */
+    0,              /* start at offset 0 in the subject */
+    0,              /* default options */
+    ovector,        /* vector for substring information */
+    30);            /* number of elements in the vector */
+
+If the \fIextra\fR argument is not NULL, it must point to a \fBpcre_extra\fR
+data block. The \fBpcre_study()\fR function returns such a block (when it
+doesn't return NULL), but you can also create one for yourself, and pass
+additional information in it. The fields in the block are as follows:
+
+  unsigned long int \fIflags\fR;
+  void *\fIstudy_data\fR;
+  unsigned long int \fImatch_limit\fR;
+  void *\fIcallout_data\fR;
+
+The \fIflags\fR field is a bitmap that specifies which of the other fields
+are set. The flag bits are:
+
+  PCRE_EXTRA_STUDY_DATA
+  PCRE_EXTRA_MATCH_LIMIT
+  PCRE_EXTRA_CALLOUT_DATA
+
+Other flag bits should be set to zero. The \fIstudy_data\fR field is set in the
+\fBpcre_extra\fR block that is returned by \fBpcre_study()\fR, together with
+the appropriate flag bit. You should not set this yourself, but you can add to
+the block by setting the other fields.
+
+The \fImatch_limit\fR field provides a means of preventing PCRE from using up a
+vast amount of resources when running patterns that are not going to match,
+but which have a very large number of possibilities in their search trees. The
+classic example is the use of nested unlimited repeats. Internally, PCRE uses a
+function called \fBmatch()\fR which it calls repeatedly (sometimes
+recursively). The limit is imposed on the number of times this function is
+called during a match, which has the effect of limiting the amount of recursion
+and backtracking that can take place. For patterns that are not anchored, the
+count starts from zero for each position in the subject string.
+
+The default limit for the library can be set when PCRE is built; the default
+default is 10 million, which handles all but the most extreme cases. You can
+reduce the default by suppling \fBpcre_exec()\fR with a \fRpcre_extra\fR block
+in which \fImatch_limit\fR is set to a smaller value, and
+PCRE_EXTRA_MATCH_LIMIT is set in the \fIflags\fR field. If the limit is
+exceeded, \fBpcre_exec()\fR returns PCRE_ERROR_MATCHLIMIT.
+
+The \fIpcre_callout\fR field is used in conjunction with the "callout" feature,
+which is described in the \fBpcrecallout\fR documentation.
+
+The PCRE_ANCHORED option can be passed in the \fIoptions\fR argument, whose
+unused bits must be zero. This limits \fBpcre_exec()\fR to matching at the
+first matching position. However, if a pattern was compiled with PCRE_ANCHORED,
+or turned out to be anchored by virtue of its contents, it cannot be made
+unachored at matching time.
+
+When PCRE_UTF8 was set at compile time, the validity of the subject as a UTF-8
+string is automatically checked, and the value of \fIstartoffset\fR is also
+checked to ensure that it points to the start of a UTF-8 character. If an
+invalid UTF-8 sequence of bytes is found, \fBpcre_exec()\fR returns the error
+PCRE_ERROR_BADUTF8. If \fIstartoffset\fR contains an invalid value,
+PCRE_ERROR_BADUTF8_OFFSET is returned.
+
+If you already know that your subject is valid, and you want to skip these
+checks for performance reasons, you can set the PCRE_NO_UTF8_CHECK option when
+calling \fBpcre_exec()\fR. You might want to do this for the second and
+subsequent calls to \fBpcre_exec()\fR if you are making repeated calls to find
+all the matches in a single subject string. However, you should be sure that
+the value of \fIstartoffset\fR points to the start of a UTF-8 character. When
+PCRE_NO_UTF8_CHECK is set, the effect of passing an invalid UTF-8 string as a
+subject, or a value of \fIstartoffset\fR that does not point to the start of a
+UTF-8 character, is undefined. Your program may crash.
+
+There are also three further options that can be set only at matching time:
+
+  PCRE_NOTBOL
+
+The first character of the string is not the beginning of a line, so the
+circumflex metacharacter should not match before it. Setting this without
+PCRE_MULTILINE (at compile time) causes circumflex never to match.
+
+  PCRE_NOTEOL
+
+The end of the string is not the end of a line, so the dollar metacharacter
+should not match it nor (except in multiline mode) a newline immediately before
+it. Setting this without PCRE_MULTILINE (at compile time) causes dollar never
+to match.
+
+  PCRE_NOTEMPTY
+
+An empty string is not considered to be a valid match if this option is set. If
+there are alternatives in the pattern, they are tried. If all the alternatives
+match the empty string, the entire match fails. For example, if the pattern
+
+  a?b?
+
+is applied to a string not beginning with "a" or "b", it matches the empty
+string at the start of the subject. With PCRE_NOTEMPTY set, this match is not
+valid, so PCRE searches further into the string for occurrences of "a" or "b".
+
+Perl has no direct equivalent of PCRE_NOTEMPTY, but it does make a special case
+of a pattern match of the empty string within its \fBsplit()\fR function, and
+when using the /g modifier. It is possible to emulate Perl's behaviour after
+matching a null string by first trying the match again at the same offset with
+PCRE_NOTEMPTY set, and then if that fails by advancing the starting offset (see
+below) and trying an ordinary match again.
+
+The subject string is passed to \fBpcre_exec()\fR as a pointer in
+\fIsubject\fR, a length in \fIlength\fR, and a starting byte offset in
+\fIstartoffset\fR. Unlike the pattern string, the subject may contain binary
+zero bytes. When the starting offset is zero, the search for a match starts at
+the beginning of the subject, and this is by far the most common case.
+
+If the pattern was compiled with the PCRE_UTF8 option, the subject must be a
+sequence of bytes that is a valid UTF-8 string, and the starting offset must
+point to the beginning of a UTF-8 character. If an invalid UTF-8 string or
+offset is passed, an error (either PCRE_ERROR_BADUTF8 or
+PCRE_ERROR_BADUTF8_OFFSET) is returned, unless the option PCRE_NO_UTF8_CHECK is
+set, in which case PCRE's behaviour is not defined.
+
+A non-zero starting offset is useful when searching for another match in the
+same subject by calling \fBpcre_exec()\fR again after a previous success.
+Setting \fIstartoffset\fR differs from just passing over a shortened string and
+setting PCRE_NOTBOL in the case of a pattern that begins with any kind of
+lookbehind. For example, consider the pattern
+
+  \\Biss\\B
+
+which finds occurrences of "iss" in the middle of words. (\\B matches only if
+the current position in the subject is not a word boundary.) When applied to
+the string "Mississipi" the first call to \fBpcre_exec()\fR finds the first
+occurrence. If \fBpcre_exec()\fR is called again with just the remainder of the
+subject, namely "issipi", it does not match, because \\B is always false at the
+start of the subject, which is deemed to be a word boundary. However, if
+\fBpcre_exec()\fR is passed the entire string again, but with \fIstartoffset\fR
+set to 4, it finds the second occurrence of "iss" because it is able to look
+behind the starting point to discover that it is preceded by a letter.
+
+If a non-zero starting offset is passed when the pattern is anchored, one
+attempt to match at the given offset is tried. This can only succeed if the
+pattern does not require the match to be at the start of the subject.
+
+In general, a pattern matches a certain portion of the subject, and in
+addition, further substrings from the subject may be picked out by parts of the
+pattern. Following the usage in Jeffrey Friedl's book, this is called
+"capturing" in what follows, and the phrase "capturing subpattern" is used for
+a fragment of a pattern that picks out a substring. PCRE supports several other
+kinds of parenthesized subpattern that do not cause substrings to be captured.
+
+Captured substrings are returned to the caller via a vector of integer offsets
+whose address is passed in \fIovector\fR. The number of elements in the vector
+is passed in \fIovecsize\fR. The first two-thirds of the vector is used to pass
+back captured substrings, each substring using a pair of integers. The
+remaining third of the vector is used as workspace by \fBpcre_exec()\fR while
+matching capturing subpatterns, and is not available for passing back
+information. The length passed in \fIovecsize\fR should always be a multiple of
+three. If it is not, it is rounded down.
+
+When a match has been successful, information about captured substrings is
+returned in pairs of integers, starting at the beginning of \fIovector\fR, and
+continuing up to two-thirds of its length at the most. The first element of a
+pair is set to the offset of the first character in a substring, and the second
+is set to the offset of the first character after the end of a substring. The
+first pair, \fIovector[0]\fR and \fIovector[1]\fR, identify the portion of the
+subject string matched by the entire pattern. The next pair is used for the
+first capturing subpattern, and so on. The value returned by \fBpcre_exec()\fR
+is the number of pairs that have been set. If there are no capturing
+subpatterns, the return value from a successful match is 1, indicating that
+just the first pair of offsets has been set.
+
+Some convenience functions are provided for extracting the captured substrings
+as separate strings. These are described in the following section.
+
+It is possible for an capturing subpattern number \fIn+1\fR to match some
+part of the subject when subpattern \fIn\fR has not been used at all. For
+example, if the string "abc" is matched against the pattern (a|(z))(bc)
+subpatterns 1 and 3 are matched, but 2 is not. When this happens, both offset
+values corresponding to the unused subpattern are set to -1.
+
+If a capturing subpattern is matched repeatedly, it is the last portion of the
+string that it matched that gets returned.
+
+If the vector is too small to hold all the captured substrings, it is used as
+far as possible (up to two-thirds of its length), and the function returns a
+value of zero. In particular, if the substring offsets are not of interest,
+\fBpcre_exec()\fR may be called with \fIovector\fR passed as NULL and
+\fIovecsize\fR as zero. However, if the pattern contains back references and
+the \fIovector\fR isn't big enough to remember the related substrings, PCRE has
+to get additional memory for use during matching. Thus it is usually advisable
+to supply an \fIovector\fR.
+
+Note that \fBpcre_info()\fR can be used to find out how many capturing
+subpatterns there are in a compiled pattern. The smallest size for
+\fIovector\fR that will allow for \fIn\fR captured substrings, in addition to
+the offsets of the substring matched by the whole pattern, is (\fIn\fR+1)*3.
+
+If \fBpcre_exec()\fR fails, it returns a negative number. The following are
+defined in the header file:
+
+  PCRE_ERROR_NOMATCH        (-1)
+
+The subject string did not match the pattern.
+
+  PCRE_ERROR_NULL           (-2)
+
+Either \fIcode\fR or \fIsubject\fR was passed as NULL, or \fIovector\fR was
+NULL and \fIovecsize\fR was not zero.
+
+  PCRE_ERROR_BADOPTION      (-3)
+
+An unrecognized bit was set in the \fIoptions\fR argument.
+
+  PCRE_ERROR_BADMAGIC       (-4)
+
+PCRE stores a 4-byte "magic number" at the start of the compiled code, to catch
+the case when it is passed a junk pointer. This is the error it gives when the
+magic number isn't present.
+
+  PCRE_ERROR_UNKNOWN_NODE   (-5)
+
+While running the pattern match, an unknown item was encountered in the
+compiled pattern. This error could be caused by a bug in PCRE or by overwriting
+of the compiled pattern.
+
+  PCRE_ERROR_NOMEMORY       (-6)
+
+If a pattern contains back references, but the \fIovector\fR that is passed to
+\fBpcre_exec()\fR is not big enough to remember the referenced substrings, PCRE
+gets a block of memory at the start of matching to use for this purpose. If the
+call via \fBpcre_malloc()\fR fails, this error is given. The memory is freed at
+the end of matching.
+
+  PCRE_ERROR_NOSUBSTRING    (-7)
+
+This error is used by the \fBpcre_copy_substring()\fR,
+\fBpcre_get_substring()\fR, and \fBpcre_get_substring_list()\fR functions (see
+below). It is never returned by \fBpcre_exec()\fR.
+
+  PCRE_ERROR_MATCHLIMIT     (-8)
+
+The recursion and backtracking limit, as specified by the \fImatch_limit\fR
+field in a \fBpcre_extra\fR structure (or defaulted) was reached. See the
+description above.
+
+  PCRE_ERROR_CALLOUT        (-9)
+
+This error is never generated by \fBpcre_exec()\fR itself. It is provided for
+use by callout functions that want to yield a distinctive error code. See the
+\fBpcrecallout\fR documentation for details.
+
+  PCRE_ERROR_BADUTF8        (-10)
+
+A string that contains an invalid UTF-8 byte sequence was passed as a subject.
+
+  PCRE_ERROR_BADUTF8_OFFSET (-11)
+
+The UTF-8 byte sequence that was passed as a subject was valid, but the value
+of \fIstartoffset\fR did not point to the beginning of a UTF-8 character.
+
+.SH EXTRACTING CAPTURED SUBSTRINGS BY NUMBER
+.rs
+.sp
+.B int pcre_copy_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR, char *\fIbuffer\fR,
+.ti +5n
+.B int \fIbuffersize\fR);
+.PP
+.br
+.B int pcre_get_substring(const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, int \fIstringnumber\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+.PP
+.br
+.B int pcre_get_substring_list(const char *\fIsubject\fR,
+.ti +5n
+.B int *\fIovector\fR, int \fIstringcount\fR, "const char ***\fIlistptr\fR);"
+.PP
+Captured substrings can be accessed directly by using the offsets returned by
+\fBpcre_exec()\fR in \fIovector\fR. For convenience, the functions
+\fBpcre_copy_substring()\fR, \fBpcre_get_substring()\fR, and
+\fBpcre_get_substring_list()\fR are provided for extracting captured substrings
+as new, separate, zero-terminated strings. These functions identify substrings
+by number. The next section describes functions for extracting named
+substrings. A substring that contains a binary zero is correctly extracted and
+has a further zero added on the end, but the result is not, of course,
+a C string.
+
+The first three arguments are the same for all three of these functions:
+\fIsubject\fR is the subject string which has just been successfully matched,
+\fIovector\fR is a pointer to the vector of integer offsets that was passed to
+\fBpcre_exec()\fR, and \fIstringcount\fR is the number of substrings that were
+captured by the match, including the substring that matched the entire regular
+expression. This is the value returned by \fBpcre_exec\fR if it is greater than
+zero. If \fBpcre_exec()\fR returned zero, indicating that it ran out of space
+in \fIovector\fR, the value passed as \fIstringcount\fR should be the size of
+the vector divided by three.
+
+The functions \fBpcre_copy_substring()\fR and \fBpcre_get_substring()\fR
+extract a single substring, whose number is given as \fIstringnumber\fR. A
+value of zero extracts the substring that matched the entire pattern, while
+higher values extract the captured substrings. For \fBpcre_copy_substring()\fR,
+the string is placed in \fIbuffer\fR, whose length is given by
+\fIbuffersize\fR, while for \fBpcre_get_substring()\fR a new block of memory is
+obtained via \fBpcre_malloc\fR, and its address is returned via
+\fIstringptr\fR. The yield of the function is the length of the string, not
+including the terminating zero, or one of
+
+  PCRE_ERROR_NOMEMORY       (-6)
+
+The buffer was too small for \fBpcre_copy_substring()\fR, or the attempt to get
+memory failed for \fBpcre_get_substring()\fR.
+
+  PCRE_ERROR_NOSUBSTRING    (-7)
+
+There is no substring whose number is \fIstringnumber\fR.
+
+The \fBpcre_get_substring_list()\fR function extracts all available substrings
+and builds a list of pointers to them. All this is done in a single block of
+memory which is obtained via \fBpcre_malloc\fR. The address of the memory block
+is returned via \fIlistptr\fR, which is also the start of the list of string
+pointers. The end of the list is marked by a NULL pointer. The yield of the
+function is zero if all went well, or
+
+  PCRE_ERROR_NOMEMORY       (-6)
+
+if the attempt to get the memory block failed.
+
+When any of these functions encounter a substring that is unset, which can
+happen when capturing subpattern number \fIn+1\fR matches some part of the
+subject, but subpattern \fIn\fR has not been used at all, they return an empty
+string. This can be distinguished from a genuine zero-length substring by
+inspecting the appropriate offset in \fIovector\fR, which is negative for unset
+substrings.
+
+The two convenience functions \fBpcre_free_substring()\fR and
+\fBpcre_free_substring_list()\fR can be used to free the memory returned by
+a previous call of \fBpcre_get_substring()\fR or
+\fBpcre_get_substring_list()\fR, respectively. They do nothing more than call
+the function pointed to by \fBpcre_free\fR, which of course could be called
+directly from a C program. However, PCRE is used in some situations where it is
+linked via a special interface to another programming language which cannot use
+\fBpcre_free\fR directly; it is for these cases that the functions are
+provided.
+
+.SH EXTRACTING CAPTURED SUBSTRINGS BY NAME
+.rs
+.sp
+.B int pcre_copy_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B char *\fIbuffer\fR, int \fIbuffersize\fR);
+.PP
+.br
+.B int pcre_get_stringnumber(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIname\fR);
+.PP
+.br
+.B int pcre_get_named_substring(const pcre *\fIcode\fR,
+.ti +5n
+.B const char *\fIsubject\fR, int *\fIovector\fR,
+.ti +5n
+.B int \fIstringcount\fR, const char *\fIstringname\fR,
+.ti +5n
+.B const char **\fIstringptr\fR);
+.PP
+To extract a substring by name, you first have to find associated number. This
+can be done by calling \fBpcre_get_stringnumber()\fR. The first argument is the
+compiled pattern, and the second is the name. For example, for this pattern
+
+  ab(?<xxx>\\d+)...
+
+the number of the subpattern called "xxx" is 1. Given the number, you can then
+extract the substring directly, or use one of the functions described in the
+previous section. For convenience, there are also two functions that do the
+whole job.
+
+Most of the arguments of \fIpcre_copy_named_substring()\fR and
+\fIpcre_get_named_substring()\fR are the same as those for the functions that
+extract by number, and so are not re-described here. There are just two
+differences.
+
+First, instead of a substring number, a substring name is given. Second, there
+is an extra argument, given at the start, which is a pointer to the compiled
+pattern. This is needed in order to gain access to the name-to-number
+translation table.
+
+These functions call \fBpcre_get_stringnumber()\fR, and if it succeeds, they
+then call \fIpcre_copy_substring()\fR or \fIpcre_get_substring()\fR, as
+appropriate.
+
+.in 0
+Last updated: 09 December 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcrebuild.3 b/external-libs/pcre/doc/pcrebuild.3
new file mode 100644
index 00000000..a91782c0
--- /dev/null
+++ b/external-libs/pcre/doc/pcrebuild.3
@@ -0,0 +1,145 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH PCRE BUILD-TIME OPTIONS
+.rs
+.sp
+This document describes the optional features of PCRE that can be selected when
+the library is compiled. They are all selected, or deselected, by providing
+options to the \fBconfigure\fR script which is run before the \fBmake\fR
+command. The complete list of options for \fBconfigure\fR (which includes the
+standard ones such as the selection of the installation directory) can be
+obtained by running
+
+  ./configure --help
+
+The following sections describe certain options whose names begin with --enable
+or --disable. These settings specify changes to the defaults for the
+\fBconfigure\fR command. Because of the way that \fBconfigure\fR works,
+--enable and --disable always come in pairs, so the complementary option always
+exists as well, but as it specifies the default, it is not described.
+
+.SH UTF-8 SUPPORT
+.rs
+.sp
+To build PCRE with support for UTF-8 character strings, add
+
+  --enable-utf8
+
+to the \fBconfigure\fR command. Of itself, this does not make PCRE treat
+strings as UTF-8. As well as compiling PCRE with this option, you also have
+have to set the PCRE_UTF8 option when you call the \fBpcre_compile()\fR
+function.
+
+.SH CODE VALUE OF NEWLINE
+.rs
+.sp
+By default, PCRE treats character 10 (linefeed) as the newline character. This
+is the normal newline character on Unix-like systems. You can compile PCRE to
+use character 13 (carriage return) instead by adding
+
+  --enable-newline-is-cr
+
+to the \fBconfigure\fR command. For completeness there is also a
+--enable-newline-is-lf option, which explicitly specifies linefeed as the
+newline character.
+
+.SH BUILDING SHARED AND STATIC LIBRARIES
+.rs
+.sp
+The PCRE building process uses \fBlibtool\fR to build both shared and static
+Unix libraries by default. You can suppress one of these by adding one of
+
+  --disable-shared
+  --disable-static
+
+to the \fBconfigure\fR command, as required.
+
+.SH POSIX MALLOC USAGE
+.rs
+.sp
+When PCRE is called through the POSIX interface (see the \fBpcreposix\fR
+documentation), additional working storage is required for holding the pointers
+to capturing substrings because PCRE requires three integers per substring,
+whereas the POSIX interface provides only two. If the number of expected
+substrings is small, the wrapper function uses space on the stack, because this
+is faster than using \fBmalloc()\fR for each call. The default threshold above
+which the stack is no longer used is 10; it can be changed by adding a setting
+such as
+
+  --with-posix-malloc-threshold=20
+
+to the \fBconfigure\fR command.
+
+.SH LIMITING PCRE RESOURCE USAGE
+.rs
+.sp
+Internally, PCRE has a function called \fBmatch()\fR which it calls repeatedly
+(possibly recursively) when performing a matching operation. By limiting the
+number of times this function may be called, a limit can be placed on the
+resources used by a single call to \fBpcre_exec()\fR. The limit can be changed
+at run time, as described in the \fBpcreapi\fR documentation. The default is 10
+million, but this can be changed by adding a setting such as
+
+  --with-match-limit=500000
+
+to the \fBconfigure\fR command.
+
+.SH HANDLING VERY LARGE PATTERNS
+.rs
+.sp
+Within a compiled pattern, offset values are used to point from one part to
+another (for example, from an opening parenthesis to an alternation
+metacharacter). By default two-byte values are used for these offsets, leading
+to a maximum size for a compiled pattern of around 64K. This is sufficient to
+handle all but the most gigantic patterns. Nevertheless, some people do want to
+process enormous patterns, so it is possible to compile PCRE to use three-byte
+or four-byte offsets by adding a setting such as
+
+  --with-link-size=3
+
+to the \fBconfigure\fR command. The value given must be 2, 3, or 4. Using
+longer offsets slows down the operation of PCRE because it has to load
+additional bytes when handling them.
+
+If you build PCRE with an increased link size, test 2 (and test 5 if you are
+using UTF-8) will fail. Part of the output of these tests is a representation
+of the compiled pattern, and this changes with the link size.
+
+.SH AVOIDING EXCESSIVE STACK USAGE
+.rs
+.sp
+PCRE implements backtracking while matching by making recursive calls to an
+internal function called \fBmatch()\fR. In environments where the size of the
+stack is limited, this can severely limit PCRE's operation. (The Unix
+environment does not usually suffer from this problem.) An alternative approach
+that uses memory from the heap to remember data, instead of using recursive
+function calls, has been implemented to work round this problem. If you want to
+build a version of PCRE that works this way, add
+
+  --disable-stack-for-recursion
+
+to the \fBconfigure\fR command. With this configuration, PCRE will use the
+\fBpcre_stack_malloc\fR and \fBpcre_stack_free\fR variables to call memory
+management functions. Separate functions are provided because the usage is very
+predictable: the block sizes requested are always the same, and the blocks are
+always freed in reverse order. A calling program might be able to implement
+optimized functions that perform better than the standard \fBmalloc()\fR and
+\fBfree()\fR functions. PCRE runs noticeably more slowly when built in this
+way.
+
+.SH USING EBCDIC CODE
+.rs
+.sp
+PCRE assumes by default that it will run in an environment where the character
+code is ASCII (or UTF-8, which is a superset of ASCII). PCRE can, however, be
+compiled to run in an EBCDIC environment by adding
+
+  --enable-ebcdic
+
+to the \fBconfigure\fR command.
+
+.in 0
+Last updated: 09 December 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcrecallout.3 b/external-libs/pcre/doc/pcrecallout.3
new file mode 100644
index 00000000..bfbb66b2
--- /dev/null
+++ b/external-libs/pcre/doc/pcrecallout.3
@@ -0,0 +1,92 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH PCRE CALLOUTS
+.rs
+.sp
+.B int (*pcre_callout)(pcre_callout_block *);
+.PP
+PCRE provides a feature called "callout", which is a means of temporarily
+passing control to the caller of PCRE in the middle of pattern matching. The
+caller of PCRE provides an external function by putting its entry point in the
+global variable \fIpcre_callout\fR. By default, this variable contains NULL,
+which disables all calling out.
+
+Within a regular expression, (?C) indicates the points at which the external
+function is to be called. Different callout points can be identified by putting
+a number less than 256 after the letter C. The default value is zero.
+For example, this pattern has two callout points:
+
+  (?C1)\dabc(?C2)def
+
+During matching, when PCRE reaches a callout point (and \fIpcre_callout\fR is
+set), the external function is called. Its only argument is a pointer to a
+\fBpcre_callout\fR block. This contains the following variables:
+
+  int          \fIversion\fR;
+  int          \fIcallout_number\fR;
+  int         *\fIoffset_vector\fR;
+  const char  *\fIsubject\fR;
+  int          \fIsubject_length\fR;
+  int          \fIstart_match\fR;
+  int          \fIcurrent_position\fR;
+  int          \fIcapture_top\fR;
+  int          \fIcapture_last\fR;
+  void        *\fIcallout_data\fR;
+
+The \fIversion\fR field is an integer containing the version number of the
+block format. The current version is zero. The version number may change in
+future if additional fields are added, but the intention is never to remove any
+of the existing fields.
+
+The \fIcallout_number\fR field contains the number of the callout, as compiled
+into the pattern (that is, the number after ?C).
+
+The \fIoffset_vector\fR field is a pointer to the vector of offsets that was
+passed by the caller to \fBpcre_exec()\fR. The contents can be inspected in
+order to extract substrings that have been matched so far, in the same way as
+for extracting substrings after a match has completed.
+
+The \fIsubject\fR and \fIsubject_length\fR fields contain copies the values
+that were passed to \fBpcre_exec()\fR.
+
+The \fIstart_match\fR field contains the offset within the subject at which the
+current match attempt started. If the pattern is not anchored, the callout
+function may be called several times for different starting points.
+
+The \fIcurrent_position\fR field contains the offset within the subject of the
+current match pointer.
+
+The \fIcapture_top\fR field contains one more than the number of the highest
+numbered captured substring so far. If no substrings have been captured,
+the value of \fIcapture_top\fR is one.
+
+The \fIcapture_last\fR field contains the number of the most recently captured
+substring.
+
+The \fIcallout_data\fR field contains a value that is passed to
+\fBpcre_exec()\fR by the caller specifically so that it can be passed back in
+callouts. It is passed in the \fIpcre_callout\fR field of the \fBpcre_extra\fR
+data structure. If no such data was passed, the value of \fIcallout_data\fR in
+a \fBpcre_callout\fR block is NULL. There is a description of the
+\fBpcre_extra\fR structure in the \fBpcreapi\fR documentation.
+
+
+.SH RETURN VALUES
+.rs
+.sp
+The callout function returns an integer. If the value is zero, matching
+proceeds as normal. If the value is greater than zero, matching fails at the
+current point, but backtracking to test other possibilities goes ahead, just as
+if a lookahead assertion had failed. If the value is less than zero, the match
+is abandoned, and \fBpcre_exec()\fR returns the value.
+
+Negative values should normally be chosen from the set of PCRE_ERROR_xxx
+values. In particular, PCRE_ERROR_NOMATCH forces a standard "no match" failure.
+The error number PCRE_ERROR_CALLOUT is reserved for use by callout functions;
+it will never be used by PCRE itself.
+
+.in 0
+Last updated: 21 January 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcrecompat.3 b/external-libs/pcre/doc/pcrecompat.3
new file mode 100644
index 00000000..e358f607
--- /dev/null
+++ b/external-libs/pcre/doc/pcrecompat.3
@@ -0,0 +1,107 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH DIFFERENCES FROM PERL
+.rs
+.sp
+This document describes the differences in the ways that PCRE and Perl handle
+regular expressions. The differences described here are with respect to Perl
+5.8.
+
+1. PCRE does not have full UTF-8 support. Details of what it does have are
+given in the
+.\" HTML <a href="pcre.html#utf8support">
+.\" </a>
+section on UTF-8 support
+.\"
+in the main
+.\" HREF
+\fBpcre\fR
+.\"
+page.
+
+2. PCRE does not allow repeat quantifiers on lookahead assertions. Perl permits
+them, but they do not mean what you might think. For example, (?!a){3} does
+not assert that the next three characters are not "a". It just asserts that the
+next character is not "a" three times.
+
+3. Capturing subpatterns that occur inside negative lookahead assertions are
+counted, but their entries in the offsets vector are never set. Perl sets its
+numerical variables from any such patterns that are matched before the
+assertion fails to match something (thereby succeeding), but only if the
+negative lookahead assertion contains just one branch.
+
+4. Though binary zero characters are supported in the subject string, they are
+not allowed in a pattern string because it is passed as a normal C string,
+terminated by zero. The escape sequence "\\0" can be used in the pattern to
+represent a binary zero.
+
+5. The following Perl escape sequences are not supported: \\l, \\u, \\L,
+\\U, \\P, \\p, \\N, and \\X. In fact these are implemented by Perl's general
+string-handling and are not part of its pattern matching engine. If any of
+these are encountered by PCRE, an error is generated.
+
+6. PCRE does support the \\Q...\\E escape for quoting substrings. Characters in
+between are treated as literals. This is slightly different from Perl in that $
+and @ are also handled as literals inside the quotes. In Perl, they cause
+variable interpolation (but of course PCRE does not have variables). Note the
+following examples:
+
+    Pattern            PCRE matches      Perl matches
+
+    \\Qabc$xyz\\E        abc$xyz           abc followed by the
+                                           contents of $xyz
+    \\Qabc\\$xyz\\E       abc\\$xyz          abc\\$xyz
+    \\Qabc\\E\\$\\Qxyz\\E   abc$xyz           abc$xyz
+
+The \\Q...\\E sequence is recognized both inside and outside character classes.
+
+7. Fairly obviously, PCRE does not support the (?{code}) and (?p{code})
+constructions. However, there is some experimental support for recursive
+patterns using the non-Perl items (?R), (?number) and (?P>name). Also, the PCRE
+"callout" feature allows an external function to be called during pattern
+matching.
+
+8. There are some differences that are concerned with the settings of captured
+strings when part of a pattern is repeated. For example, matching "aba" against
+the pattern /^(a(b)?)+$/ in Perl leaves $2 unset, but in PCRE it is set to "b".
+
+9. PCRE provides some extensions to the Perl regular expression facilities:
+
+(a) Although lookbehind assertions must match fixed length strings, each
+alternative branch of a lookbehind assertion can match a different length of
+string. Perl requires them all to have the same length.
+
+(b) If PCRE_DOLLAR_ENDONLY is set and PCRE_MULTILINE is not set, the $
+meta-character matches only at the very end of the string.
+
+(c) If PCRE_EXTRA is set, a backslash followed by a letter with no special
+meaning is faulted.
+
+(d) If PCRE_UNGREEDY is set, the greediness of the repetition quantifiers is
+inverted, that is, by default they are not greedy, but if followed by a
+question mark they are.
+
+(e) PCRE_ANCHORED can be used to force a pattern to be tried only at the first
+matching position in the subject string.
+
+(f) The PCRE_NOTBOL, PCRE_NOTEOL, PCRE_NOTEMPTY, and PCRE_NO_AUTO_CAPTURE
+options for \fBpcre_exec()\fR have no Perl equivalents.
+
+(g) The (?R), (?number), and (?P>name) constructs allows for recursive pattern
+matching (Perl can do this using the (?p{code}) construct, which PCRE cannot
+support.)
+
+(h) PCRE supports named capturing substrings, using the Python syntax.
+
+(i) PCRE supports the possessive quantifier "++" syntax, taken from Sun's Java
+package.
+
+(j) The (R) condition, for testing recursion, is a PCRE extension.
+
+(k) The callout facility is PCRE-specific.
+
+.in 0
+Last updated: 09 December 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcregrep.1 b/external-libs/pcre/doc/pcregrep.1
new file mode 100644
index 00000000..c40dc054
--- /dev/null
+++ b/external-libs/pcre/doc/pcregrep.1
@@ -0,0 +1,130 @@
+.TH PCREGREP 1
+.SH NAME
+pcregrep - a grep with Perl-compatible regular expressions.
+.SH SYNOPSIS
+.B pcregrep [-Vcfhilnrsuvx] [long options] [pattern] [file1 file2 ...]
+
+.SH DESCRIPTION
+.rs
+.sp
+\fBpcregrep\fR searches files for character patterns, in the same way as other
+grep commands do, but it uses the PCRE regular expression library to support
+patterns that are compatible with the regular expressions of Perl 5. See
+.\" HREF
+\fBpcrepattern\fR
+.\"
+for a full description of syntax and semantics of the regular expressions that
+PCRE supports.
+
+A pattern must be specified on the command line unless the \fB-f\fR option is
+used (see below).
+
+If no files are specified, \fBpcregrep\fR reads the standard input. By default,
+each line that matches the pattern is copied to the standard output, and if
+there is more than one file, the file name is printed before each line of
+output. However, there are options that can change how \fBpcregrep\fR behaves.
+
+Lines are limited to BUFSIZ characters. BUFSIZ is defined in \fB<stdio.h>\fR.
+The newline character is removed from the end of each line before it is matched
+against the pattern.
+
+.SH OPTIONS
+.rs
+.sp
+.TP 10
+\fB-V\fR
+Write the version number of the PCRE library being used to the standard error
+stream.
+.TP
+\fB-c\fR
+Do not print individual lines; instead just print a count of the number of
+lines that would otherwise have been printed. If several files are given, a
+count is printed for each of them.
+.TP
+\fB-f\fR\fIfilename\fR
+Read a number of patterns from the file, one per line, and match all of them
+against each line of input. A line is output if any of the patterns match it.
+When \fB-f\fR is used, no pattern is taken from the command line; all arguments
+are treated as file names. There is a maximum of 100 patterns. Trailing white
+space is removed, and blank lines are ignored. An empty file contains no
+patterns and therefore matches nothing.
+.TP
+\fB-h\fR
+Suppress printing of filenames when searching multiple files.
+.TP
+\fB-i\fR
+Ignore upper/lower case distinctions during comparisons.
+.TP
+\fB-l\fR
+Instead of printing lines from the files, just print the names of the files
+containing lines that would have been printed. Each file name is printed
+once, on a separate line.
+.TP
+\fB-n\fR
+Precede each line by its line number in the file.
+.TP
+\fB-r\fR
+If any file is a directory, recursively scan the files it contains. Without
+\fB-r\fR a directory is scanned as a normal file.
+.TP
+\fB-s\fR
+Work silently, that is, display nothing except error messages.
+The exit status indicates whether any matches were found.
+.TP
+\fB-u\fR
+Operate in UTF-8 mode. This option is available only if PCRE has been compiled
+with UTF-8 support. Both the pattern and each subject line are assumed to be
+valid strings of UTF-8 characters.
+.TP
+\fB-v\fR
+Invert the sense of the match, so that lines which do \fInot\fR match the
+pattern are now the ones that are found.
+.TP
+\fB-x\fR
+Force the pattern to be anchored (it must start matching at the beginning of
+the line) and in addition, require it to match the entire line. This is
+equivalent to having ^ and $ characters at the start and end of each
+alternative branch in the regular expression.
+
+.SH LONG OPTIONS
+.rs
+.sp
+Long forms of all the options are available, as in GNU grep. They are shown in
+the following table:
+
+  -c   --count
+  -h   --no-filename
+  -i   --ignore-case
+  -l   --files-with-matches
+  -n   --line-number
+  -r   --recursive
+  -s   --no-messages
+  -u   --utf-8
+  -V   --version
+  -v   --invert-match
+  -x   --line-regex
+  -x   --line-regexp
+
+In addition, --file=\fIfilename\fR is equivalent to -f\fIfilename\fR, and
+--help shows the list of options and then exits.
+
+.SH DIAGNOSTICS
+.rs
+.sp
+Exit status is 0 if any matches were found, 1 if no matches were found, and 2
+for syntax errors or inacessible files (even if matches were found).
+
+
+.SH AUTHOR
+.rs
+.sp
+Philip Hazel <ph10@cam.ac.uk>
+.br
+University Computing Service
+.br
+Cambridge CB2 3QG, England.
+
+.in 0
+Last updated: 03 February 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcregrep.txt b/external-libs/pcre/doc/pcregrep.txt
new file mode 100644
index 00000000..aae8928f
--- /dev/null
+++ b/external-libs/pcre/doc/pcregrep.txt
@@ -0,0 +1,124 @@
+PCREGREP(1)                                                        PCREGREP(1)
+
+
+
+NAME
+       pcregrep - a grep with Perl-compatible regular expressions.
+
+SYNOPSIS
+       pcregrep [-Vcfhilnrsuvx] [long options] [pattern] [file1 file2 ...]
+
+
+DESCRIPTION
+
+       pcregrep  searches  files  for  character  patterns, in the same way as
+       other grep commands do, but it uses the PCRE regular expression library
+       to support patterns that are compatible with the regular expressions of
+       Perl 5. See pcrepattern for a full description of syntax and  semantics
+       of the regular expressions that PCRE supports.
+
+       A pattern must be specified on the command line unless the -f option is
+       used (see below).
+
+       If no files are  specified,  pcregrep  reads  the  standard  input.  By
+       default,  each  line that matches the pattern is copied to the standard
+       output, and if there is more than one file, the file  name  is  printed
+       before  each line of output. However, there are options that can change
+       how pcregrep behaves.
+
+       Lines are limited to BUFSIZ characters. BUFSIZ is defined in <stdio.h>.
+       The newline character is removed from the end of each line before it is
+       matched against the pattern.
+
+
+OPTIONS
+
+
+       -V        Write the version number of the PCRE library  being  used  to
+                 the standard error stream.
+
+       -c        Do  not print individual lines; instead just print a count of
+                 the number of lines that would otherwise have  been  printed.
+                 If  several  files  are given, a count is printed for each of
+                 them.
+
+       -ffilename
+                 Read a number of patterns from the file, one  per  line,  and
+                 match  all of them against each line of input. A line is out-
+                 put if any of the patterns match it.  When  -f  is  used,  no
+                 pattern  is  taken  from  the command line; all arguments are
+                 treated as file names. There is a maximum  of  100  patterns.
+                 Trailing white space is removed, and blank lines are ignored.
+                 An empty file contains  no  patterns  and  therefore  matches
+                 nothing.
+
+       -h        Suppress printing of filenames when searching multiple files.
+
+       -i        Ignore upper/lower case distinctions during comparisons.
+
+       -l        Instead of printing lines from  the  files,  just  print  the
+                 names  of  the  files  containing  lines that would have been
+                 printed. Each file name is printed once, on a separate  line.
+
+       -n        Precede each line by its line number in the file.
+
+       -r        If  any  file  is  a directory, recursively scan the files it
+                 contains. Without -r a directory is scanned as a normal file.
+
+       -s        Work  silently,  that  is,  display nothing except error mes-
+                 sages.  The exit status indicates whether  any  matches  were
+                 found.
+
+       -u        Operate  in UTF-8 mode. This option is available only if PCRE
+                 has been compiled with UTF-8 support. Both  the  pattern  and
+                 each  subject  line  are assumed to be valid strings of UTF-8
+                 characters.
+
+       -v        Invert the sense of the match, so that  lines  which  do  not
+                 match the pattern are now the ones that are found.
+
+       -x        Force  the  pattern to be anchored (it must start matching at
+                 the beginning of the line) and in  addition,  require  it  to
+                 match  the  entire line. This is equivalent to having ^ and $
+                 characters at the start and end of each alternative branch in
+                 the regular expression.
+
+
+LONG OPTIONS
+
+       Long  forms  of all the options are available, as in GNU grep. They are
+       shown in the following table:
+
+         -c   --count
+         -h   --no-filename
+         -i   --ignore-case
+         -l   --files-with-matches
+         -n   --line-number
+         -r   --recursive
+         -s   --no-messages
+         -u   --utf-8
+         -V   --version
+         -v   --invert-match
+         -x   --line-regex
+         -x   --line-regexp
+
+       In addition, --file=filename is equivalent to  -ffilename,  and  --help
+       shows the list of options and then exits.
+
+
+DIAGNOSTICS
+
+       Exit status is 0 if any matches were found, 1 if no matches were found,
+       and 2 for syntax errors or inacessible  files  (even  if  matches  were
+       found).
+
+
+
+AUTHOR
+
+       Philip Hazel <ph10@cam.ac.uk>
+       University Computing Service
+       Cambridge CB2 3QG, England.
+
+Last updated: 03 February 2003
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcrepattern.3 b/external-libs/pcre/doc/pcrepattern.3
new file mode 100644
index 00000000..101aa311
--- /dev/null
+++ b/external-libs/pcre/doc/pcrepattern.3
@@ -0,0 +1,1231 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH PCRE REGULAR EXPRESSION DETAILS
+.rs
+.sp
+The syntax and semantics of the regular expressions supported by PCRE are
+described below. Regular expressions are also described in the Perl
+documentation and in a number of other books, some of which have copious
+examples. Jeffrey Friedl's "Mastering Regular Expressions", published by
+O'Reilly, covers them in great detail. The description here is intended as
+reference documentation.
+
+The basic operation of PCRE is on strings of bytes. However, there is also
+support for UTF-8 character strings. To use this support you must build PCRE to
+include UTF-8 support, and then call \fBpcre_compile()\fR with the PCRE_UTF8
+option. How this affects the pattern matching is mentioned in several places
+below. There is also a summary of UTF-8 features in the
+.\" HTML <a href="pcre.html#utf8support">
+.\" </a>
+section on UTF-8 support
+.\"
+in the main
+.\" HREF
+\fBpcre\fR
+.\"
+page.
+
+A regular expression is a pattern that is matched against a subject string from
+left to right. Most characters stand for themselves in a pattern, and match the
+corresponding characters in the subject. As a trivial example, the pattern
+
+  The quick brown fox
+
+matches a portion of a subject string that is identical to itself. The power of
+regular expressions comes from the ability to include alternatives and
+repetitions in the pattern. These are encoded in the pattern by the use of
+\fImeta-characters\fR, which do not stand for themselves but instead are
+interpreted in some special way.
+
+There are two different sets of meta-characters: those that are recognized
+anywhere in the pattern except within square brackets, and those that are
+recognized in square brackets. Outside square brackets, the meta-characters are
+as follows:
+
+  \\      general escape character with several uses
+  ^      assert start of string (or line, in multiline mode)
+  $      assert end of string (or line, in multiline mode)
+  .      match any character except newline (by default)
+  [      start character class definition
+  |      start of alternative branch
+  (      start subpattern
+  )      end subpattern
+  ?      extends the meaning of (
+         also 0 or 1 quantifier
+         also quantifier minimizer
+  *      0 or more quantifier
+  +      1 or more quantifier
+         also "possessive quantifier"
+  {      start min/max quantifier
+
+Part of a pattern that is in square brackets is called a "character class". In
+a character class the only meta-characters are:
+
+  \\      general escape character
+  ^      negate the class, but only if the first character
+  -      indicates character range
+  [      POSIX character class (only if followed by POSIX
+           syntax)
+  ]      terminates the character class
+
+The following sections describe the use of each of the meta-characters.
+
+.SH BACKSLASH
+.rs
+.sp
+The backslash character has several uses. Firstly, if it is followed by a
+non-alphameric character, it takes away any special meaning that character may
+have. This use of backslash as an escape character applies both inside and
+outside character classes.
+
+For example, if you want to match a * character, you write \\* in the pattern.
+This escaping action applies whether or not the following character would
+otherwise be interpreted as a meta-character, so it is always safe to precede a
+non-alphameric with backslash to specify that it stands for itself. In
+particular, if you want to match a backslash, you write \\\\.
+
+If a pattern is compiled with the PCRE_EXTENDED option, whitespace in the
+pattern (other than in a character class) and characters between a # outside
+a character class and the next newline character are ignored. An escaping
+backslash can be used to include a whitespace or # character as part of the
+pattern.
+
+If you want to remove the special meaning from a sequence of characters, you
+can do so by putting them between \\Q and \\E. This is different from Perl in
+that $ and @ are handled as literals in \\Q...\\E sequences in PCRE, whereas in
+Perl, $ and @ cause variable interpolation. Note the following examples:
+
+  Pattern            PCRE matches   Perl matches
+
+  \\Qabc$xyz\\E        abc$xyz        abc followed by the
+                                      contents of $xyz
+  \\Qabc\\$xyz\\E       abc\\$xyz       abc\\$xyz
+  \\Qabc\\E\\$\\Qxyz\\E   abc$xyz        abc$xyz
+
+The \\Q...\\E sequence is recognized both inside and outside character classes.
+
+A second use of backslash provides a way of encoding non-printing characters
+in patterns in a visible manner. There is no restriction on the appearance of
+non-printing characters, apart from the binary zero that terminates a pattern,
+but when a pattern is being prepared by text editing, it is usually easier to
+use one of the following escape sequences than the binary character it
+represents:
+
+  \\a        alarm, that is, the BEL character (hex 07)
+  \\cx       "control-x", where x is any character
+  \\e        escape (hex 1B)
+  \\f        formfeed (hex 0C)
+  \\n        newline (hex 0A)
+  \\r        carriage return (hex 0D)
+  \\t        tab (hex 09)
+  \\ddd      character with octal code ddd, or backreference
+  \\xhh      character with hex code hh
+  \\x{hhh..} character with hex code hhh... (UTF-8 mode only)
+
+The precise effect of \\cx is as follows: if x is a lower case letter, it
+is converted to upper case. Then bit 6 of the character (hex 40) is inverted.
+Thus \\cz becomes hex 1A, but \\c{ becomes hex 3B, while \\c; becomes hex
+7B.
+
+After \\x, from zero to two hexadecimal digits are read (letters can be in
+upper or lower case). In UTF-8 mode, any number of hexadecimal digits may
+appear between \\x{ and }, but the value of the character code must be less
+than 2**31 (that is, the maximum hexadecimal value is 7FFFFFFF). If characters
+other than hexadecimal digits appear between \\x{ and }, or if there is no
+terminating }, this form of escape is not recognized. Instead, the initial
+\\x will be interpreted as a basic hexadecimal escape, with no following
+digits, giving a byte whose value is zero.
+
+Characters whose value is less than 256 can be defined by either of the two
+syntaxes for \\x when PCRE is in UTF-8 mode. There is no difference in the
+way they are handled. For example, \\xdc is exactly the same as \\x{dc}.
+
+After \\0 up to two further octal digits are read. In both cases, if there
+are fewer than two digits, just those that are present are used. Thus the
+sequence \\0\\x\\07 specifies two binary zeros followed by a BEL character
+(code value 7). Make sure you supply two digits after the initial zero if the
+character that follows is itself an octal digit.
+
+The handling of a backslash followed by a digit other than 0 is complicated.
+Outside a character class, PCRE reads it and any following digits as a decimal
+number. If the number is less than 10, or if there have been at least that many
+previous capturing left parentheses in the expression, the entire sequence is
+taken as a \fIback reference\fR. A description of how this works is given
+later, following the discussion of parenthesized subpatterns.
+
+Inside a character class, or if the decimal number is greater than 9 and there
+have not been that many capturing subpatterns, PCRE re-reads up to three octal
+digits following the backslash, and generates a single byte from the least
+significant 8 bits of the value. Any subsequent digits stand for themselves.
+For example:
+
+  \\040   is another way of writing a space
+  \\40    is the same, provided there are fewer than 40
+            previous capturing subpatterns
+  \\7     is always a back reference
+  \\11    might be a back reference, or another way of
+            writing a tab
+  \\011   is always a tab
+  \\0113  is a tab followed by the character "3"
+  \\113   might be a back reference, otherwise the
+            character with octal code 113
+  \\377   might be a back reference, otherwise
+            the byte consisting entirely of 1 bits
+  \\81    is either a back reference, or a binary zero
+            followed by the two characters "8" and "1"
+
+Note that octal values of 100 or greater must not be introduced by a leading
+zero, because no more than three octal digits are ever read.
+
+All the sequences that define a single byte value or a single UTF-8 character
+(in UTF-8 mode) can be used both inside and outside character classes. In
+addition, inside a character class, the sequence \\b is interpreted as the
+backspace character (hex 08). Outside a character class it has a different
+meaning (see below).
+
+The third use of backslash is for specifying generic character types:
+
+  \\d     any decimal digit
+  \\D     any character that is not a decimal digit
+  \\s     any whitespace character
+  \\S     any character that is not a whitespace character
+  \\w     any "word" character
+  \\W     any "non-word" character
+
+Each pair of escape sequences partitions the complete set of characters into
+two disjoint sets. Any given character matches one, and only one, of each pair.
+
+In UTF-8 mode, characters with values greater than 255 never match \\d, \\s, or
+\\w, and always match \\D, \\S, and \\W.
+
+For compatibility with Perl, \\s does not match the VT character (code 11).
+This makes it different from the the POSIX "space" class. The \\s characters
+are HT (9), LF (10), FF (12), CR (13), and space (32).
+
+A "word" character is any letter or digit or the underscore character, that is,
+any character which can be part of a Perl "word". The definition of letters and
+digits is controlled by PCRE's character tables, and may vary if locale-
+specific matching is taking place (see
+.\" HTML <a href="pcreapi.html#localesupport">
+.\" </a>
+"Locale support"
+.\"
+in the
+.\" HREF
+\fBpcreapi\fR
+.\"
+page). For example, in the "fr" (French) locale, some character codes greater
+than 128 are used for accented letters, and these are matched by \\w.
+
+These character type sequences can appear both inside and outside character
+classes. They each match one character of the appropriate type. If the current
+matching point is at the end of the subject string, all of them fail, since
+there is no character to match.
+
+The fourth use of backslash is for certain simple assertions. An assertion
+specifies a condition that has to be met at a particular point in a match,
+without consuming any characters from the subject string. The use of
+subpatterns for more complicated assertions is described below. The backslashed
+assertions are
+
+  \\b     matches at a word boundary
+  \\B     matches when not at a word boundary
+  \\A     matches at start of subject
+  \\Z     matches at end of subject or before newline at end
+  \\z     matches at end of subject
+  \\G     matches at first matching position in subject
+
+These assertions may not appear in character classes (but note that \\b has a
+different meaning, namely the backspace character, inside a character class).
+
+A word boundary is a position in the subject string where the current character
+and the previous character do not both match \\w or \\W (i.e. one matches
+\\w and the other matches \\W), or the start or end of the string if the
+first or last character matches \\w, respectively.
+
+The \\A, \\Z, and \\z assertions differ from the traditional circumflex and
+dollar (described below) in that they only ever match at the very start and end
+of the subject string, whatever options are set. Thus, they are independent of
+multiline mode.
+
+They are not affected by the PCRE_NOTBOL or PCRE_NOTEOL options. If the
+\fIstartoffset\fR argument of \fBpcre_exec()\fR is non-zero, indicating that
+matching is to start at a point other than the beginning of the subject, \\A
+can never match. The difference between \\Z and \\z is that \\Z matches before
+a newline that is the last character of the string as well as at the end of the
+string, whereas \\z matches only at the end.
+
+The \\G assertion is true only when the current matching position is at the
+start point of the match, as specified by the \fIstartoffset\fR argument of
+\fBpcre_exec()\fR. It differs from \\A when the value of \fIstartoffset\fR is
+non-zero. By calling \fBpcre_exec()\fR multiple times with appropriate
+arguments, you can mimic Perl's /g option, and it is in this kind of
+implementation where \\G can be useful.
+
+Note, however, that PCRE's interpretation of \\G, as the start of the current
+match, is subtly different from Perl's, which defines it as the end of the
+previous match. In Perl, these can be different when the previously matched
+string was empty. Because PCRE does just one match at a time, it cannot
+reproduce this behaviour.
+
+If all the alternatives of a pattern begin with \\G, the expression is anchored
+to the starting match position, and the "anchored" flag is set in the compiled
+regular expression.
+
+.SH CIRCUMFLEX AND DOLLAR
+.rs
+.sp
+Outside a character class, in the default matching mode, the circumflex
+character is an assertion which is true only if the current matching point is
+at the start of the subject string. If the \fIstartoffset\fR argument of
+\fBpcre_exec()\fR is non-zero, circumflex can never match if the PCRE_MULTILINE
+option is unset. Inside a character class, circumflex has an entirely different
+meaning (see below).
+
+Circumflex need not be the first character of the pattern if a number of
+alternatives are involved, but it should be the first thing in each alternative
+in which it appears if the pattern is ever to match that branch. If all
+possible alternatives start with a circumflex, that is, if the pattern is
+constrained to match only at the start of the subject, it is said to be an
+"anchored" pattern. (There are also other constructs that can cause a pattern
+to be anchored.)
+
+A dollar character is an assertion which is true only if the current matching
+point is at the end of the subject string, or immediately before a newline
+character that is the last character in the string (by default). Dollar need
+not be the last character of the pattern if a number of alternatives are
+involved, but it should be the last item in any branch in which it appears.
+Dollar has no special meaning in a character class.
+
+The meaning of dollar can be changed so that it matches only at the very end of
+the string, by setting the PCRE_DOLLAR_ENDONLY option at compile time. This
+does not affect the \\Z assertion.
+
+The meanings of the circumflex and dollar characters are changed if the
+PCRE_MULTILINE option is set. When this is the case, they match immediately
+after and immediately before an internal newline character, respectively, in
+addition to matching at the start and end of the subject string. For example,
+the pattern /^abc$/ matches the subject string "def\\nabc" in multiline mode,
+but not otherwise. Consequently, patterns that are anchored in single line mode
+because all branches start with ^ are not anchored in multiline mode, and a
+match for circumflex is possible when the \fIstartoffset\fR argument of
+\fBpcre_exec()\fR is non-zero. The PCRE_DOLLAR_ENDONLY option is ignored if
+PCRE_MULTILINE is set.
+
+Note that the sequences \\A, \\Z, and \\z can be used to match the start and
+end of the subject in both modes, and if all branches of a pattern start with
+\\A it is always anchored, whether PCRE_MULTILINE is set or not.
+
+.SH FULL STOP (PERIOD, DOT)
+.rs
+.sp
+Outside a character class, a dot in the pattern matches any one character in
+the subject, including a non-printing character, but not (by default) newline.
+In UTF-8 mode, a dot matches any UTF-8 character, which might be more than one
+byte long, except (by default) for newline. If the PCRE_DOTALL option is set,
+dots match newlines as well. The handling of dot is entirely independent of the
+handling of circumflex and dollar, the only relationship being that they both
+involve newline characters. Dot has no special meaning in a character class.
+
+.SH MATCHING A SINGLE BYTE
+.rs
+.sp
+Outside a character class, the escape sequence \\C matches any one byte, both
+in and out of UTF-8 mode. Unlike a dot, it always matches a newline. The
+feature is provided in Perl in order to match individual bytes in UTF-8 mode.
+Because it breaks up UTF-8 characters into individual bytes, what remains in
+the string may be a malformed UTF-8 string. For this reason it is best avoided.
+
+PCRE does not allow \\C to appear in lookbehind assertions (see below), because
+in UTF-8 mode it makes it impossible to calculate the length of the lookbehind.
+
+.SH SQUARE BRACKETS
+.rs
+.sp
+An opening square bracket introduces a character class, terminated by a closing
+square bracket. A closing square bracket on its own is not special. If a
+closing square bracket is required as a member of the class, it should be the
+first data character in the class (after an initial circumflex, if present) or
+escaped with a backslash.
+
+A character class matches a single character in the subject. In UTF-8 mode, the
+character may occupy more than one byte. A matched character must be in the set
+of characters defined by the class, unless the first character in the class
+definition is a circumflex, in which case the subject character must not be in
+the set defined by the class. If a circumflex is actually required as a member
+of the class, ensure it is not the first character, or escape it with a
+backslash.
+
+For example, the character class [aeiou] matches any lower case vowel, while
+[^aeiou] matches any character that is not a lower case vowel. Note that a
+circumflex is just a convenient notation for specifying the characters which
+are in the class by enumerating those that are not. It is not an assertion: it
+still consumes a character from the subject string, and fails if the current
+pointer is at the end of the string.
+
+In UTF-8 mode, characters with values greater than 255 can be included in a
+class as a literal string of bytes, or by using the \\x{ escaping mechanism.
+
+When caseless matching is set, any letters in a class represent both their
+upper case and lower case versions, so for example, a caseless [aeiou] matches
+"A" as well as "a", and a caseless [^aeiou] does not match "A", whereas a
+caseful version would. PCRE does not support the concept of case for characters
+with values greater than 255.
+
+The newline character is never treated in any special way in character classes,
+whatever the setting of the PCRE_DOTALL or PCRE_MULTILINE options is. A class
+such as [^a] will always match a newline.
+
+The minus (hyphen) character can be used to specify a range of characters in a
+character class. For example, [d-m] matches any letter between d and m,
+inclusive. If a minus character is required in a class, it must be escaped with
+a backslash or appear in a position where it cannot be interpreted as
+indicating a range, typically as the first or last character in the class.
+
+It is not possible to have the literal character "]" as the end character of a
+range. A pattern such as [W-]46] is interpreted as a class of two characters
+("W" and "-") followed by a literal string "46]", so it would match "W46]" or
+"-46]". However, if the "]" is escaped with a backslash it is interpreted as
+the end of range, so [W-\\]46] is interpreted as a single class containing a
+range followed by two separate characters. The octal or hexadecimal
+representation of "]" can also be used to end a range.
+
+Ranges operate in the collating sequence of character values. They can also be
+used for characters specified numerically, for example [\\000-\\037]. In UTF-8
+mode, ranges can include characters whose values are greater than 255, for
+example [\\x{100}-\\x{2ff}].
+
+If a range that includes letters is used when caseless matching is set, it
+matches the letters in either case. For example, [W-c] is equivalent to
+[][\\^_`wxyzabc], matched caselessly, and if character tables for the "fr"
+locale are in use, [\\xc8-\\xcb] matches accented E characters in both cases.
+
+The character types \\d, \\D, \\s, \\S, \\w, and \\W may also appear in a
+character class, and add the characters that they match to the class. For
+example, [\\dABCDEF] matches any hexadecimal digit. A circumflex can
+conveniently be used with the upper case character types to specify a more
+restricted set of characters than the matching lower case type. For example,
+the class [^\\W_] matches any letter or digit, but not underscore.
+
+All non-alphameric characters other than \\, -, ^ (at the start) and the
+terminating ] are non-special in character classes, but it does no harm if they
+are escaped.
+
+.SH POSIX CHARACTER CLASSES
+.rs
+.sp
+Perl supports the POSIX notation for character classes, which uses names
+enclosed by [: and :] within the enclosing square brackets. PCRE also supports
+this notation. For example,
+
+  [01[:alpha:]%]
+
+matches "0", "1", any alphabetic character, or "%". The supported class names
+are
+
+  alnum    letters and digits
+  alpha    letters
+  ascii    character codes 0 - 127
+  blank    space or tab only
+  cntrl    control characters
+  digit    decimal digits (same as \\d)
+  graph    printing characters, excluding space
+  lower    lower case letters
+  print    printing characters, including space
+  punct    printing characters, excluding letters and digits
+  space    white space (not quite the same as \\s)
+  upper    upper case letters
+  word     "word" characters (same as \\w)
+  xdigit   hexadecimal digits
+
+The "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13), and
+space (32). Notice that this list includes the VT character (code 11). This
+makes "space" different to \\s, which does not include VT (for Perl
+compatibility).
+
+The name "word" is a Perl extension, and "blank" is a GNU extension from Perl
+5.8. Another Perl extension is negation, which is indicated by a ^ character
+after the colon. For example,
+
+  [12[:^digit:]]
+
+matches "1", "2", or any non-digit. PCRE (and Perl) also recognize the POSIX
+syntax [.ch.] and [=ch=] where "ch" is a "collating element", but these are not
+supported, and an error is given if they are encountered.
+
+In UTF-8 mode, characters with values greater than 255 do not match any of
+the POSIX character classes.
+
+.SH VERTICAL BAR
+.rs
+.sp
+Vertical bar characters are used to separate alternative patterns. For example,
+the pattern
+
+  gilbert|sullivan
+
+matches either "gilbert" or "sullivan". Any number of alternatives may appear,
+and an empty alternative is permitted (matching the empty string).
+The matching process tries each alternative in turn, from left to right,
+and the first one that succeeds is used. If the alternatives are within a
+subpattern (defined below), "succeeds" means matching the rest of the main
+pattern as well as the alternative in the subpattern.
+
+.SH INTERNAL OPTION SETTING
+.rs
+.sp
+The settings of the PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, and
+PCRE_EXTENDED options can be changed from within the pattern by a sequence of
+Perl option letters enclosed between "(?" and ")". The option letters are
+
+  i  for PCRE_CASELESS
+  m  for PCRE_MULTILINE
+  s  for PCRE_DOTALL
+  x  for PCRE_EXTENDED
+
+For example, (?im) sets caseless, multiline matching. It is also possible to
+unset these options by preceding the letter with a hyphen, and a combined
+setting and unsetting such as (?im-sx), which sets PCRE_CASELESS and
+PCRE_MULTILINE while unsetting PCRE_DOTALL and PCRE_EXTENDED, is also
+permitted. If a letter appears both before and after the hyphen, the option is
+unset.
+
+When an option change occurs at top level (that is, not inside subpattern
+parentheses), the change applies to the remainder of the pattern that follows.
+If the change is placed right at the start of a pattern, PCRE extracts it into
+the global options (and it will therefore show up in data extracted by the
+\fBpcre_fullinfo()\fR function).
+
+An option change within a subpattern affects only that part of the current
+pattern that follows it, so
+
+  (a(?i)b)c
+
+matches abc and aBc and no other strings (assuming PCRE_CASELESS is not used).
+By this means, options can be made to have different settings in different
+parts of the pattern. Any changes made in one alternative do carry on
+into subsequent branches within the same subpattern. For example,
+
+  (a(?i)b|c)
+
+matches "ab", "aB", "c", and "C", even though when matching "C" the first
+branch is abandoned before the option setting. This is because the effects of
+option settings happen at compile time. There would be some very weird
+behaviour otherwise.
+
+The PCRE-specific options PCRE_UNGREEDY and PCRE_EXTRA can be changed in the
+same way as the Perl-compatible options by using the characters U and X
+respectively. The (?X) flag setting is special in that it must always occur
+earlier in the pattern than any of the additional features it turns on, even
+when it is at top level. It is best put at the start.
+
+.SH SUBPATTERNS
+.rs
+.sp
+Subpatterns are delimited by parentheses (round brackets), which can be nested.
+Marking part of a pattern as a subpattern does two things:
+
+1. It localizes a set of alternatives. For example, the pattern
+
+  cat(aract|erpillar|)
+
+matches one of the words "cat", "cataract", or "caterpillar". Without the
+parentheses, it would match "cataract", "erpillar" or the empty string.
+
+2. It sets up the subpattern as a capturing subpattern (as defined above).
+When the whole pattern matches, that portion of the subject string that matched
+the subpattern is passed back to the caller via the \fIovector\fR argument of
+\fBpcre_exec()\fR. Opening parentheses are counted from left to right (starting
+from 1) to obtain the numbers of the capturing subpatterns.
+
+For example, if the string "the red king" is matched against the pattern
+
+  the ((red|white) (king|queen))
+
+the captured substrings are "red king", "red", and "king", and are numbered 1,
+2, and 3, respectively.
+
+The fact that plain parentheses fulfil two functions is not always helpful.
+There are often times when a grouping subpattern is required without a
+capturing requirement. If an opening parenthesis is followed by a question mark
+and a colon, the subpattern does not do any capturing, and is not counted when
+computing the number of any subsequent capturing subpatterns. For example, if
+the string "the white queen" is matched against the pattern
+
+  the ((?:red|white) (king|queen))
+
+the captured substrings are "white queen" and "queen", and are numbered 1 and
+2. The maximum number of capturing subpatterns is 65535, and the maximum depth
+of nesting of all subpatterns, both capturing and non-capturing, is 200.
+
+As a convenient shorthand, if any option settings are required at the start of
+a non-capturing subpattern, the option letters may appear between the "?" and
+the ":". Thus the two patterns
+
+  (?i:saturday|sunday)
+  (?:(?i)saturday|sunday)
+
+match exactly the same set of strings. Because alternative branches are tried
+from left to right, and options are not reset until the end of the subpattern
+is reached, an option setting in one branch does affect subsequent branches, so
+the above patterns match "SUNDAY" as well as "Saturday".
+
+.SH NAMED SUBPATTERNS
+.rs
+.sp
+Identifying capturing parentheses by number is simple, but it can be very hard
+to keep track of the numbers in complicated regular expressions. Furthermore,
+if an expression is modified, the numbers may change. To help with the
+difficulty, PCRE supports the naming of subpatterns, something that Perl does
+not provide. The Python syntax (?P<name>...) is used. Names consist of
+alphanumeric characters and underscores, and must be unique within a pattern.
+
+Named capturing parentheses are still allocated numbers as well as names. The
+PCRE API provides function calls for extracting the name-to-number translation
+table from a compiled pattern. For further details see the
+.\" HREF
+\fBpcreapi\fR
+.\"
+documentation.
+
+.SH REPETITION
+.rs
+.sp
+Repetition is specified by quantifiers, which can follow any of the following
+items:
+
+  a literal data character
+  the . metacharacter
+  the \\C escape sequence
+  escapes such as \\d that match single characters
+  a character class
+  a back reference (see next section)
+  a parenthesized subpattern (unless it is an assertion)
+
+The general repetition quantifier specifies a minimum and maximum number of
+permitted matches, by giving the two numbers in curly brackets (braces),
+separated by a comma. The numbers must be less than 65536, and the first must
+be less than or equal to the second. For example:
+
+  z{2,4}
+
+matches "zz", "zzz", or "zzzz". A closing brace on its own is not a special
+character. If the second number is omitted, but the comma is present, there is
+no upper limit; if the second number and the comma are both omitted, the
+quantifier specifies an exact number of required matches. Thus
+
+  [aeiou]{3,}
+
+matches at least 3 successive vowels, but may match many more, while
+
+  \\d{8}
+
+matches exactly 8 digits. An opening curly bracket that appears in a position
+where a quantifier is not allowed, or one that does not match the syntax of a
+quantifier, is taken as a literal character. For example, {,6} is not a
+quantifier, but a literal string of four characters.
+
+In UTF-8 mode, quantifiers apply to UTF-8 characters rather than to individual
+bytes. Thus, for example, \\x{100}{2} matches two UTF-8 characters, each of
+which is represented by a two-byte sequence.
+
+The quantifier {0} is permitted, causing the expression to behave as if the
+previous item and the quantifier were not present.
+
+For convenience (and historical compatibility) the three most common
+quantifiers have single-character abbreviations:
+
+  *    is equivalent to {0,}
+  +    is equivalent to {1,}
+  ?    is equivalent to {0,1}
+
+It is possible to construct infinite loops by following a subpattern that can
+match no characters with a quantifier that has no upper limit, for example:
+
+  (a?)*
+
+Earlier versions of Perl and PCRE used to give an error at compile time for
+such patterns. However, because there are cases where this can be useful, such
+patterns are now accepted, but if any repetition of the subpattern does in fact
+match no characters, the loop is forcibly broken.
+
+By default, the quantifiers are "greedy", that is, they match as much as
+possible (up to the maximum number of permitted times), without causing the
+rest of the pattern to fail. The classic example of where this gives problems
+is in trying to match comments in C programs. These appear between the
+sequences /* and */ and within the sequence, individual * and / characters may
+appear. An attempt to match C comments by applying the pattern
+
+  /\\*.*\\*/
+
+to the string
+
+  /* first command */  not comment  /* second comment */
+
+fails, because it matches the entire string owing to the greediness of the .*
+item.
+
+However, if a quantifier is followed by a question mark, it ceases to be
+greedy, and instead matches the minimum number of times possible, so the
+pattern
+
+  /\\*.*?\\*/
+
+does the right thing with the C comments. The meaning of the various
+quantifiers is not otherwise changed, just the preferred number of matches.
+Do not confuse this use of question mark with its use as a quantifier in its
+own right. Because it has two uses, it can sometimes appear doubled, as in
+
+  \\d??\\d
+
+which matches one digit by preference, but can match two if that is the only
+way the rest of the pattern matches.
+
+If the PCRE_UNGREEDY option is set (an option which is not available in Perl),
+the quantifiers are not greedy by default, but individual ones can be made
+greedy by following them with a question mark. In other words, it inverts the
+default behaviour.
+
+When a parenthesized subpattern is quantified with a minimum repeat count that
+is greater than 1 or with a limited maximum, more store is required for the
+compiled pattern, in proportion to the size of the minimum or maximum.
+
+If a pattern starts with .* or .{0,} and the PCRE_DOTALL option (equivalent
+to Perl's /s) is set, thus allowing the . to match newlines, the pattern is
+implicitly anchored, because whatever follows will be tried against every
+character position in the subject string, so there is no point in retrying the
+overall match at any position after the first. PCRE normally treats such a
+pattern as though it were preceded by \\A.
+
+In cases where it is known that the subject string contains no newlines, it is
+worth setting PCRE_DOTALL in order to obtain this optimization, or
+alternatively using ^ to indicate anchoring explicitly.
+
+However, there is one situation where the optimization cannot be used. When .*
+is inside capturing parentheses that are the subject of a backreference
+elsewhere in the pattern, a match at the start may fail, and a later one
+succeed. Consider, for example:
+
+  (.*)abc\\1
+
+If the subject is "xyz123abc123" the match point is the fourth character. For
+this reason, such a pattern is not implicitly anchored.
+
+When a capturing subpattern is repeated, the value captured is the substring
+that matched the final iteration. For example, after
+
+  (tweedle[dume]{3}\\s*)+
+
+has matched "tweedledum tweedledee" the value of the captured substring is
+"tweedledee". However, if there are nested capturing subpatterns, the
+corresponding captured values may have been set in previous iterations. For
+example, after
+
+  /(a|(b))+/
+
+matches "aba" the value of the second captured substring is "b".
+
+.SH ATOMIC GROUPING AND POSSESSIVE QUANTIFIERS
+.rs
+.sp
+With both maximizing and minimizing repetition, failure of what follows
+normally causes the repeated item to be re-evaluated to see if a different
+number of repeats allows the rest of the pattern to match. Sometimes it is
+useful to prevent this, either to change the nature of the match, or to cause
+it fail earlier than it otherwise might, when the author of the pattern knows
+there is no point in carrying on.
+
+Consider, for example, the pattern \\d+foo when applied to the subject line
+
+  123456bar
+
+After matching all 6 digits and then failing to match "foo", the normal
+action of the matcher is to try again with only 5 digits matching the \\d+
+item, and then with 4, and so on, before ultimately failing. "Atomic grouping"
+(a term taken from Jeffrey Friedl's book) provides the means for specifying
+that once a subpattern has matched, it is not to be re-evaluated in this way.
+
+If we use atomic grouping for the previous example, the matcher would give up
+immediately on failing to match "foo" the first time. The notation is a kind of
+special parenthesis, starting with (?> as in this example:
+
+  (?>\\d+)foo
+
+This kind of parenthesis "locks up" the  part of the pattern it contains once
+it has matched, and a failure further into the pattern is prevented from
+backtracking into it. Backtracking past it to previous items, however, works as
+normal.
+
+An alternative description is that a subpattern of this type matches the string
+of characters that an identical standalone pattern would match, if anchored at
+the current point in the subject string.
+
+Atomic grouping subpatterns are not capturing subpatterns. Simple cases such as
+the above example can be thought of as a maximizing repeat that must swallow
+everything it can. So, while both \\d+ and \\d+? are prepared to adjust the
+number of digits they match in order to make the rest of the pattern match,
+(?>\\d+) can only match an entire sequence of digits.
+
+Atomic groups in general can of course contain arbitrarily complicated
+subpatterns, and can be nested. However, when the subpattern for an atomic
+group is just a single repeated item, as in the example above, a simpler
+notation, called a "possessive quantifier" can be used. This consists of an
+additional + character following a quantifier. Using this notation, the
+previous example can be rewritten as
+
+  \\d++bar
+
+Possessive quantifiers are always greedy; the setting of the PCRE_UNGREEDY
+option is ignored. They are a convenient notation for the simpler forms of
+atomic group. However, there is no difference in the meaning or processing of a
+possessive quantifier and the equivalent atomic group.
+
+The possessive quantifier syntax is an extension to the Perl syntax. It
+originates in Sun's Java package.
+
+When a pattern contains an unlimited repeat inside a subpattern that can itself
+be repeated an unlimited number of times, the use of an atomic group is the
+only way to avoid some failing matches taking a very long time indeed. The
+pattern
+
+  (\\D+|<\\d+>)*[!?]
+
+matches an unlimited number of substrings that either consist of non-digits, or
+digits enclosed in <>, followed by either ! or ?. When it matches, it runs
+quickly. However, if it is applied to
+
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+
+it takes a long time before reporting failure. This is because the string can
+be divided between the two repeats in a large number of ways, and all have to
+be tried. (The example used [!?] rather than a single character at the end,
+because both PCRE and Perl have an optimization that allows for fast failure
+when a single character is used. They remember the last single character that
+is required for a match, and fail early if it is not present in the string.)
+If the pattern is changed to
+
+  ((?>\\D+)|<\\d+>)*[!?]
+
+sequences of non-digits cannot be broken, and failure happens quickly.
+
+.SH BACK REFERENCES
+.rs
+.sp
+Outside a character class, a backslash followed by a digit greater than 0 (and
+possibly further digits) is a back reference to a capturing subpattern earlier
+(that is, to its left) in the pattern, provided there have been that many
+previous capturing left parentheses.
+
+However, if the decimal number following the backslash is less than 10, it is
+always taken as a back reference, and causes an error only if there are not
+that many capturing left parentheses in the entire pattern. In other words, the
+parentheses that are referenced need not be to the left of the reference for
+numbers less than 10. See the section entitled "Backslash" above for further
+details of the handling of digits following a backslash.
+
+A back reference matches whatever actually matched the capturing subpattern in
+the current subject string, rather than anything matching the subpattern
+itself (see
+.\" HTML <a href="#subpatternsassubroutines">
+.\" </a>
+"Subpatterns as subroutines"
+.\"
+below for a way of doing that). So the pattern
+
+  (sens|respons)e and \\1ibility
+
+matches "sense and sensibility" and "response and responsibility", but not
+"sense and responsibility". If caseful matching is in force at the time of the
+back reference, the case of letters is relevant. For example,
+
+  ((?i)rah)\\s+\\1
+
+matches "rah rah" and "RAH RAH", but not "RAH rah", even though the original
+capturing subpattern is matched caselessly.
+
+Back references to named subpatterns use the Python syntax (?P=name). We could
+rewrite the above example as follows:
+
+  (?<p1>(?i)rah)\\s+(?P=p1)
+
+There may be more than one back reference to the same subpattern. If a
+subpattern has not actually been used in a particular match, any back
+references to it always fail. For example, the pattern
+
+  (a|(bc))\\2
+
+always fails if it starts to match "a" rather than "bc". Because there may be
+many capturing parentheses in a pattern, all digits following the backslash are
+taken as part of a potential back reference number. If the pattern continues
+with a digit character, some delimiter must be used to terminate the back
+reference. If the PCRE_EXTENDED option is set, this can be whitespace.
+Otherwise an empty comment can be used.
+
+A back reference that occurs inside the parentheses to which it refers fails
+when the subpattern is first used, so, for example, (a\\1) never matches.
+However, such references can be useful inside repeated subpatterns. For
+example, the pattern
+
+  (a|b\\1)+
+
+matches any number of "a"s and also "aba", "ababbaa" etc. At each iteration of
+the subpattern, the back reference matches the character string corresponding
+to the previous iteration. In order for this to work, the pattern must be such
+that the first iteration does not need to match the back reference. This can be
+done using alternation, as in the example above, or by a quantifier with a
+minimum of zero.
+
+.SH ASSERTIONS
+.rs
+.sp
+An assertion is a test on the characters following or preceding the current
+matching point that does not actually consume any characters. The simple
+assertions coded as \\b, \\B, \\A, \\G, \\Z, \\z, ^ and $ are described above.
+More complicated assertions are coded as subpatterns. There are two kinds:
+those that look ahead of the current position in the subject string, and those
+that look behind it.
+
+An assertion subpattern is matched in the normal way, except that it does not
+cause the current matching position to be changed. Lookahead assertions start
+with (?= for positive assertions and (?! for negative assertions. For example,
+
+  \\w+(?=;)
+
+matches a word followed by a semicolon, but does not include the semicolon in
+the match, and
+
+  foo(?!bar)
+
+matches any occurrence of "foo" that is not followed by "bar". Note that the
+apparently similar pattern
+
+  (?!foo)bar
+
+does not find an occurrence of "bar" that is preceded by something other than
+"foo"; it finds any occurrence of "bar" whatsoever, because the assertion
+(?!foo) is always true when the next three characters are "bar". A
+lookbehind assertion is needed to achieve this effect.
+
+If you want to force a matching failure at some point in a pattern, the most
+convenient way to do it is with (?!) because an empty string always matches, so
+an assertion that requires there not to be an empty string must always fail.
+
+Lookbehind assertions start with (?<= for positive assertions and (?<! for
+negative assertions. For example,
+
+  (?<!foo)bar
+
+does find an occurrence of "bar" that is not preceded by "foo". The contents of
+a lookbehind assertion are restricted such that all the strings it matches must
+have a fixed length. However, if there are several alternatives, they do not
+all have to have the same fixed length. Thus
+
+  (?<=bullock|donkey)
+
+is permitted, but
+
+  (?<!dogs?|cats?)
+
+causes an error at compile time. Branches that match different length strings
+are permitted only at the top level of a lookbehind assertion. This is an
+extension compared with Perl (at least for 5.8), which requires all branches to
+match the same length of string. An assertion such as
+
+  (?<=ab(c|de))
+
+is not permitted, because its single top-level branch can match two different
+lengths, but it is acceptable if rewritten to use two top-level branches:
+
+  (?<=abc|abde)
+
+The implementation of lookbehind assertions is, for each alternative, to
+temporarily move the current position back by the fixed width and then try to
+match. If there are insufficient characters before the current position, the
+match is deemed to fail.
+
+PCRE does not allow the \\C escape (which matches a single byte in UTF-8 mode)
+to appear in lookbehind assertions, because it makes it impossible to calculate
+the length of the lookbehind.
+
+Atomic groups can be used in conjunction with lookbehind assertions to specify
+efficient matching at the end of the subject string. Consider a simple pattern
+such as
+
+  abcd$
+
+when applied to a long string that does not match. Because matching proceeds
+from left to right, PCRE will look for each "a" in the subject and then see if
+what follows matches the rest of the pattern. If the pattern is specified as
+
+  ^.*abcd$
+
+the initial .* matches the entire string at first, but when this fails (because
+there is no following "a"), it backtracks to match all but the last character,
+then all but the last two characters, and so on. Once again the search for "a"
+covers the entire string, from right to left, so we are no better off. However,
+if the pattern is written as
+
+  ^(?>.*)(?<=abcd)
+
+or, equivalently,
+
+  ^.*+(?<=abcd)
+
+there can be no backtracking for the .* item; it can match only the entire
+string. The subsequent lookbehind assertion does a single test on the last four
+characters. If it fails, the match fails immediately. For long strings, this
+approach makes a significant difference to the processing time.
+
+Several assertions (of any sort) may occur in succession. For example,
+
+  (?<=\\d{3})(?<!999)foo
+
+matches "foo" preceded by three digits that are not "999". Notice that each of
+the assertions is applied independently at the same point in the subject
+string. First there is a check that the previous three characters are all
+digits, and then there is a check that the same three characters are not "999".
+This pattern does \fInot\fR match "foo" preceded by six characters, the first
+of which are digits and the last three of which are not "999". For example, it
+doesn't match "123abcfoo". A pattern to do that is
+
+  (?<=\\d{3}...)(?<!999)foo
+
+This time the first assertion looks at the preceding six characters, checking
+that the first three are digits, and then the second assertion checks that the
+preceding three characters are not "999".
+
+Assertions can be nested in any combination. For example,
+
+  (?<=(?<!foo)bar)baz
+
+matches an occurrence of "baz" that is preceded by "bar" which in turn is not
+preceded by "foo", while
+
+  (?<=\\d{3}(?!999)...)foo
+
+is another pattern which matches "foo" preceded by three digits and any three
+characters that are not "999".
+
+Assertion subpatterns are not capturing subpatterns, and may not be repeated,
+because it makes no sense to assert the same thing several times. If any kind
+of assertion contains capturing subpatterns within it, these are counted for
+the purposes of numbering the capturing subpatterns in the whole pattern.
+However, substring capturing is carried out only for positive assertions,
+because it does not make sense for negative assertions.
+
+.SH CONDITIONAL SUBPATTERNS
+.rs
+.sp
+It is possible to cause the matching process to obey a subpattern
+conditionally or to choose between two alternative subpatterns, depending on
+the result of an assertion, or whether a previous capturing subpattern matched
+or not. The two possible forms of conditional subpattern are
+
+  (?(condition)yes-pattern)
+  (?(condition)yes-pattern|no-pattern)
+
+If the condition is satisfied, the yes-pattern is used; otherwise the
+no-pattern (if present) is used. If there are more than two alternatives in the
+subpattern, a compile-time error occurs.
+
+There are three kinds of condition. If the text between the parentheses
+consists of a sequence of digits, the condition is satisfied if the capturing
+subpattern of that number has previously matched. The number must be greater
+than zero. Consider the following pattern, which contains non-significant white
+space to make it more readable (assume the PCRE_EXTENDED option) and to divide
+it into three parts for ease of discussion:
+
+  ( \\( )?    [^()]+    (?(1) \\) )
+
+The first part matches an optional opening parenthesis, and if that
+character is present, sets it as the first captured substring. The second part
+matches one or more characters that are not parentheses. The third part is a
+conditional subpattern that tests whether the first set of parentheses matched
+or not. If they did, that is, if subject started with an opening parenthesis,
+the condition is true, and so the yes-pattern is executed and a closing
+parenthesis is required. Otherwise, since no-pattern is not present, the
+subpattern matches nothing. In other words, this pattern matches a sequence of
+non-parentheses, optionally enclosed in parentheses.
+
+If the condition is the string (R), it is satisfied if a recursive call to the
+pattern or subpattern has been made. At "top level", the condition is false.
+This is a PCRE extension. Recursive patterns are described in the next section.
+
+If the condition is not a sequence of digits or (R), it must be an assertion.
+This may be a positive or negative lookahead or lookbehind assertion. Consider
+this pattern, again containing non-significant white space, and with the two
+alternatives on the second line:
+
+  (?(?=[^a-z]*[a-z])
+  \\d{2}-[a-z]{3}-\\d{2}  |  \\d{2}-\\d{2}-\\d{2} )
+
+The condition is a positive lookahead assertion that matches an optional
+sequence of non-letters followed by a letter. In other words, it tests for the
+presence of at least one letter in the subject. If a letter is found, the
+subject is matched against the first alternative; otherwise it is matched
+against the second. This pattern matches strings in one of the two forms
+dd-aaa-dd or dd-dd-dd, where aaa are letters and dd are digits.
+
+.SH COMMENTS
+.rs
+.sp
+The sequence (?# marks the start of a comment which continues up to the next
+closing parenthesis. Nested parentheses are not permitted. The characters
+that make up a comment play no part in the pattern matching at all.
+
+If the PCRE_EXTENDED option is set, an unescaped # character outside a
+character class introduces a comment that continues up to the next newline
+character in the pattern.
+
+.SH RECURSIVE PATTERNS
+.rs
+.sp
+Consider the problem of matching a string in parentheses, allowing for
+unlimited nested parentheses. Without the use of recursion, the best that can
+be done is to use a pattern that matches up to some fixed depth of nesting. It
+is not possible to handle an arbitrary nesting depth. Perl has provided an
+experimental facility that allows regular expressions to recurse (amongst other
+things). It does this by interpolating Perl code in the expression at run time,
+and the code can refer to the expression itself. A Perl pattern to solve the
+parentheses problem can be created like this:
+
+  $re = qr{\\( (?: (?>[^()]+) | (?p{$re}) )* \\)}x;
+
+The (?p{...}) item interpolates Perl code at run time, and in this case refers
+recursively to the pattern in which it appears. Obviously, PCRE cannot support
+the interpolation of Perl code. Instead, it supports some special syntax for
+recursion of the entire pattern, and also for individual subpattern recursion.
+
+The special item that consists of (? followed by a number greater than zero and
+a closing parenthesis is a recursive call of the subpattern of the given
+number, provided that it occurs inside that subpattern. (If not, it is a
+"subroutine" call, which is described in the next section.) The special item
+(?R) is a recursive call of the entire regular expression.
+
+For example, this PCRE pattern solves the nested parentheses problem (assume
+the PCRE_EXTENDED option is set so that white space is ignored):
+
+  \\( ( (?>[^()]+) | (?R) )* \\)
+
+First it matches an opening parenthesis. Then it matches any number of
+substrings which can either be a sequence of non-parentheses, or a recursive
+match of the pattern itself (that is a correctly parenthesized substring).
+Finally there is a closing parenthesis.
+
+If this were part of a larger pattern, you would not want to recurse the entire
+pattern, so instead you could use this:
+
+  ( \\( ( (?>[^()]+) | (?1) )* \\) )
+
+We have put the pattern into parentheses, and caused the recursion to refer to
+them instead of the whole pattern. In a larger pattern, keeping track of
+parenthesis numbers can be tricky. It may be more convenient to use named
+parentheses instead. For this, PCRE uses (?P>name), which is an extension to
+the Python syntax that PCRE uses for named parentheses (Perl does not provide
+named parentheses). We could rewrite the above example as follows:
+
+  (?P<pn> \\( ( (?>[^()]+) | (?P>pn) )* \\) )
+
+This particular example pattern contains nested unlimited repeats, and so the
+use of atomic grouping for matching strings of non-parentheses is important
+when applying the pattern to strings that do not match. For example, when this
+pattern is applied to
+
+  (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
+
+it yields "no match" quickly. However, if atomic grouping is not used,
+the match runs for a very long time indeed because there are so many different
+ways the + and * repeats can carve up the subject, and all have to be tested
+before failure can be reported.
+
+At the end of a match, the values set for any capturing subpatterns are those
+from the outermost level of the recursion at which the subpattern value is set.
+If you want to obtain intermediate values, a callout function can be used (see
+below and the
+.\" HREF
+\fBpcrecallout\fR
+.\"
+documentation). If the pattern above is matched against
+
+  (ab(cd)ef)
+
+the value for the capturing parentheses is "ef", which is the last value taken
+on at the top level. If additional parentheses are added, giving
+
+  \\( ( ( (?>[^()]+) | (?R) )* ) \\)
+     ^                        ^
+     ^                        ^
+
+the string they capture is "ab(cd)ef", the contents of the top level
+parentheses. If there are more than 15 capturing parentheses in a pattern, PCRE
+has to obtain extra memory to store data during a recursion, which it does by
+using \fBpcre_malloc\fR, freeing it via \fBpcre_free\fR afterwards. If no
+memory can be obtained, the match fails with the PCRE_ERROR_NOMEMORY error.
+
+Do not confuse the (?R) item with the condition (R), which tests for recursion.
+Consider this pattern, which matches text in angle brackets, allowing for
+arbitrary nesting. Only digits are allowed in nested brackets (that is, when
+recursing), whereas any characters are permitted at the outer level.
+
+  < (?: (?(R) \\d++  | [^<>]*+) | (?R)) * >
+
+In this pattern, (?(R) is the start of a conditional subpattern, with two
+different alternatives for the recursive and non-recursive cases. The (?R) item
+is the actual recursive call.
+
+.\" HTML <a name="subpatternsassubroutines"></a>
+.SH SUBPATTERNS AS SUBROUTINES
+.rs
+.sp
+If the syntax for a recursive subpattern reference (either by number or by
+name) is used outside the parentheses to which it refers, it operates like a
+subroutine in a programming language. An earlier example pointed out that the
+pattern
+
+  (sens|respons)e and \\1ibility
+
+matches "sense and sensibility" and "response and responsibility", but not
+"sense and responsibility". If instead the pattern
+
+  (sens|respons)e and (?1)ibility
+
+is used, it does match "sense and responsibility" as well as the other two
+strings. Such references must, however, follow the subpattern to which they
+refer.
+
+.SH CALLOUTS
+.rs
+.sp
+Perl has a feature whereby using the sequence (?{...}) causes arbitrary Perl
+code to be obeyed in the middle of matching a regular expression. This makes it
+possible, amongst other things, to extract different substrings that match the
+same pair of parentheses when there is a repetition.
+
+PCRE provides a similar feature, but of course it cannot obey arbitrary Perl
+code. The feature is called "callout". The caller of PCRE provides an external
+function by putting its entry point in the global variable \fIpcre_callout\fR.
+By default, this variable contains NULL, which disables all calling out.
+
+Within a regular expression, (?C) indicates the points at which the external
+function is to be called. If you want to identify different callout points, you
+can put a number less than 256 after the letter C. The default value is zero.
+For example, this pattern has two callout points:
+
+  (?C1)\dabc(?C2)def
+
+During matching, when PCRE reaches a callout point (and \fIpcre_callout\fR is
+set), the external function is called. It is provided with the number of the
+callout, and, optionally, one item of data originally supplied by the caller of
+\fBpcre_exec()\fR. The callout function may cause matching to backtrack, or to
+fail altogether. A complete description of the interface to the callout
+function is given in the
+.\" HREF
+\fBpcrecallout\fR
+.\"
+documentation.
+
+.in 0
+Last updated: 03 February 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcreperform.3 b/external-libs/pcre/doc/pcreperform.3
new file mode 100644
index 00000000..52a332fc
--- /dev/null
+++ b/external-libs/pcre/doc/pcreperform.3
@@ -0,0 +1,66 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH PCRE PERFORMANCE
+.rs
+.sp
+Certain items that may appear in regular expression patterns are more efficient
+than others. It is more efficient to use a character class like [aeiou] than a
+set of alternatives such as (a|e|i|o|u). In general, the simplest construction
+that provides the required behaviour is usually the most efficient. Jeffrey
+Friedl's book contains a lot of discussion about optimizing regular expressions
+for efficient performance.
+
+When a pattern begins with .* not in parentheses, or in parentheses that are
+not the subject of a backreference, and the PCRE_DOTALL option is set, the
+pattern is implicitly anchored by PCRE, since it can match only at the start of
+a subject string. However, if PCRE_DOTALL is not set, PCRE cannot make this
+optimization, because the . metacharacter does not then match a newline, and if
+the subject string contains newlines, the pattern may match from the character
+immediately following one of them instead of from the very start. For example,
+the pattern
+
+  .*second
+
+matches the subject "first\\nand second" (where \\n stands for a newline
+character), with the match starting at the seventh character. In order to do
+this, PCRE has to retry the match starting after every newline in the subject.
+
+If you are using such a pattern with subject strings that do not contain
+newlines, the best performance is obtained by setting PCRE_DOTALL, or starting
+the pattern with ^.* to indicate explicit anchoring. That saves PCRE from
+having to scan along the subject looking for a newline to restart at.
+
+Beware of patterns that contain nested indefinite repeats. These can take a
+long time to run when applied to a string that does not match. Consider the
+pattern fragment
+
+  (a+)*
+
+This can match "aaaa" in 33 different ways, and this number increases very
+rapidly as the string gets longer. (The * repeat can match 0, 1, 2, 3, or 4
+times, and for each of those cases other than 0, the + repeats can match
+different numbers of times.) When the remainder of the pattern is such that the
+entire match is going to fail, PCRE has in principle to try every possible
+variation, and this can take an extremely long time.
+
+An optimization catches some of the more simple cases such as
+
+  (a+)*b
+
+where a literal character follows. Before embarking on the standard matching
+procedure, PCRE checks that there is a "b" later in the subject string, and if
+there is not, it fails the match immediately. However, when there is no
+following literal this optimization cannot be used. You can see the difference
+by comparing the behaviour of
+
+  (a+)*\\d
+
+with the pattern above. The former gives a failure almost instantly when
+applied to a whole line of "a" characters, whereas the latter takes an
+appreciable time with strings longer than about 20 characters.
+
+.in 0
+Last updated: 03 February 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcreposix.3 b/external-libs/pcre/doc/pcreposix.3
new file mode 100644
index 00000000..5198630f
--- /dev/null
+++ b/external-libs/pcre/doc/pcreposix.3
@@ -0,0 +1,194 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions.
+.SH SYNOPSIS OF POSIX API
+.B #include <pcreposix.h>
+.PP
+.SM
+.br
+.B int regcomp(regex_t *\fIpreg\fR, const char *\fIpattern\fR,
+.ti +5n
+.B int \fIcflags\fR);
+.PP
+.br
+.B int regexec(regex_t *\fIpreg\fR, const char *\fIstring\fR,
+.ti +5n
+.B size_t \fInmatch\fR, regmatch_t \fIpmatch\fR[], int \fIeflags\fR);
+.PP
+.br
+.B size_t regerror(int \fIerrcode\fR, const regex_t *\fIpreg\fR,
+.ti +5n
+.B char *\fIerrbuf\fR, size_t \fIerrbuf_size\fR);
+.PP
+.br
+.B void regfree(regex_t *\fIpreg\fR);
+
+.SH DESCRIPTION
+.rs
+.sp
+This set of functions provides a POSIX-style API to the PCRE regular expression
+package. See the
+.\" HREF
+\fBpcreapi\fR
+.\"
+documentation for a description of the native API, which contains additional
+functionality.
+
+The functions described here are just wrapper functions that ultimately call
+the PCRE native API. Their prototypes are defined in the \fBpcreposix.h\fR
+header file, and on Unix systems the library itself is called
+\fBpcreposix.a\fR, so can be accessed by adding \fB-lpcreposix\fR to the
+command for linking an application which uses them. Because the POSIX functions
+call the native ones, it is also necessary to add \fR-lpcre\fR.
+
+I have implemented only those option bits that can be reasonably mapped to PCRE
+native options. In addition, the options REG_EXTENDED and REG_NOSUB are defined
+with the value zero. They have no effect, but since programs that are written
+to the POSIX interface often use them, this makes it easier to slot in PCRE as
+a replacement library. Other POSIX options are not even defined.
+
+When PCRE is called via these functions, it is only the API that is POSIX-like
+in style. The syntax and semantics of the regular expressions themselves are
+still those of Perl, subject to the setting of various PCRE options, as
+described below. "POSIX-like in style" means that the API approximates to the
+POSIX definition; it is not fully POSIX-compatible, and in multi-byte encoding
+domains it is probably even less compatible.
+
+The header for these functions is supplied as \fBpcreposix.h\fR to avoid any
+potential clash with other POSIX libraries. It can, of course, be renamed or
+aliased as \fBregex.h\fR, which is the "correct" name. It provides two
+structure types, \fIregex_t\fR for compiled internal forms, and
+\fIregmatch_t\fR for returning captured substrings. It also defines some
+constants whose names start with "REG_"; these are used for setting options and
+identifying error codes.
+
+.SH COMPILING A PATTERN
+.rs
+.sp
+The function \fBregcomp()\fR is called to compile a pattern into an
+internal form. The pattern is a C string terminated by a binary zero, and
+is passed in the argument \fIpattern\fR. The \fIpreg\fR argument is a pointer
+to a regex_t structure which is used as a base for storing information about
+the compiled expression.
+
+The argument \fIcflags\fR is either zero, or contains one or more of the bits
+defined by the following macros:
+
+  REG_ICASE
+
+The PCRE_CASELESS option is set when the expression is passed for compilation
+to the native function.
+
+  REG_NEWLINE
+
+The PCRE_MULTILINE option is set when the expression is passed for compilation
+to the native function. Note that this does \fInot\fR mimic the defined POSIX
+behaviour for REG_NEWLINE (see the following section).
+
+In the absence of these flags, no options are passed to the native function.
+This means the the regex is compiled with PCRE default semantics. In
+particular, the way it handles newline characters in the subject string is the
+Perl way, not the POSIX way. Note that setting PCRE_MULTILINE has only
+\fIsome\fR of the effects specified for REG_NEWLINE. It does not affect the way
+newlines are matched by . (they aren't) or by a negative class such as [^a]
+(they are).
+
+The yield of \fBregcomp()\fR is zero on success, and non-zero otherwise. The
+\fIpreg\fR structure is filled in on success, and one member of the structure
+is public: \fIre_nsub\fR contains the number of capturing subpatterns in
+the regular expression. Various error codes are defined in the header file.
+
+.SH MATCHING NEWLINE CHARACTERS
+.rs
+.sp
+This area is not simple, because POSIX and Perl take different views of things.
+It is not possible to get PCRE to obey POSIX semantics, but then PCRE was never
+intended to be a POSIX engine. The following table lists the different
+possibilities for matching newline characters in PCRE:
+
+                          Default   Change with
+
+  . matches newline          no     PCRE_DOTALL
+  newline matches [^a]       yes    not changeable
+  $ matches \\n at end        yes    PCRE_DOLLARENDONLY
+  $ matches \\n in middle     no     PCRE_MULTILINE
+  ^ matches \\n in middle     no     PCRE_MULTILINE
+
+This is the equivalent table for POSIX:
+
+                          Default   Change with
+
+  . matches newline          yes      REG_NEWLINE
+  newline matches [^a]       yes      REG_NEWLINE
+  $ matches \\n at end        no       REG_NEWLINE
+  $ matches \\n in middle     no       REG_NEWLINE
+  ^ matches \\n in middle     no       REG_NEWLINE
+
+PCRE's behaviour is the same as Perl's, except that there is no equivalent for
+PCRE_DOLLARENDONLY in Perl. In both PCRE and Perl, there is no way to stop
+newline from matching [^a].
+
+The default POSIX newline handling can be obtained by setting PCRE_DOTALL and
+PCRE_DOLLARENDONLY, but there is no way to make PCRE behave exactly as for the
+REG_NEWLINE action.
+
+.SH MATCHING A PATTERN
+.rs
+.sp
+The function \fBregexec()\fR is called to match a pre-compiled pattern
+\fIpreg\fR against a given \fIstring\fR, which is terminated by a zero byte,
+subject to the options in \fIeflags\fR. These can be:
+
+  REG_NOTBOL
+
+The PCRE_NOTBOL option is set when calling the underlying PCRE matching
+function.
+
+  REG_NOTEOL
+
+The PCRE_NOTEOL option is set when calling the underlying PCRE matching
+function.
+
+The portion of the string that was matched, and also any captured substrings,
+are returned via the \fIpmatch\fR argument, which points to an array of
+\fInmatch\fR structures of type \fIregmatch_t\fR, containing the members
+\fIrm_so\fR and \fIrm_eo\fR. These contain the offset to the first character of
+each substring and the offset to the first character after the end of each
+substring, respectively. The 0th element of the vector relates to the entire
+portion of \fIstring\fR that was matched; subsequent elements relate to the
+capturing subpatterns of the regular expression. Unused entries in the array
+have both structure members set to -1.
+
+A successful match yields a zero return; various error codes are defined in the
+header file, of which REG_NOMATCH is the "expected" failure code.
+
+.SH ERROR MESSAGES
+.rs
+.sp
+The \fBregerror()\fR function maps a non-zero errorcode from either
+\fBregcomp()\fR or \fBregexec()\fR to a printable message. If \fIpreg\fR is not
+NULL, the error should have arisen from the use of that structure. A message
+terminated by a binary zero is placed in \fIerrbuf\fR. The length of the
+message, including the zero, is limited to \fIerrbuf_size\fR. The yield of the
+function is the size of buffer needed to hold the whole message.
+
+.SH STORAGE
+.rs
+.sp
+Compiling a regular expression causes memory to be allocated and associated
+with the \fIpreg\fR structure. The function \fBregfree()\fR frees all such
+memory, after which \fIpreg\fR may no longer be used as a compiled expression.
+
+.SH AUTHOR
+.rs
+.sp
+Philip Hazel <ph10@cam.ac.uk>
+.br
+University Computing Service,
+.br
+Cambridge CB2 3QG, England.
+
+.in 0
+Last updated: 03 February 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcresample.3 b/external-libs/pcre/doc/pcresample.3
new file mode 100644
index 00000000..02a7a548
--- /dev/null
+++ b/external-libs/pcre/doc/pcresample.3
@@ -0,0 +1,52 @@
+.TH PCRE 3
+.SH NAME
+PCRE - Perl-compatible regular expressions
+.SH PCRE SAMPLE PROGRAM
+.rs
+.sp
+A simple, complete demonstration program, to get you started with using PCRE,
+is supplied in the file \fIpcredemo.c\fR in the PCRE distribution.
+
+The program compiles the regular expression that is its first argument, and
+matches it against the subject string in its second argument. No PCRE options
+are set, and default character tables are used. If matching succeeds, the
+program outputs the portion of the subject that matched, together with the
+contents of any captured substrings.
+
+If the -g option is given on the command line, the program then goes on to
+check for further matches of the same regular expression in the same subject
+string. The logic is a little bit tricky because of the possibility of matching
+an empty string. Comments in the code explain what is going on.
+
+On a Unix system that has PCRE installed in \fI/usr/local\fR, you can compile
+the demonstration program using a command like this:
+
+  gcc -o pcredemo pcredemo.c -I/usr/local/include \\
+      -L/usr/local/lib -lpcre
+
+Then you can run simple tests like this:
+
+  ./pcredemo 'cat|dog' 'the cat sat on the mat'
+  ./pcredemo -g 'cat|dog' 'the dog sat on the cat'
+
+Note that there is a much more comprehensive test program, called
+\fBpcretest\fR, which supports many more facilities for testing regular
+expressions and the PCRE library. The \fBpcredemo\fR program is provided as a
+simple coding example.
+
+On some operating systems (e.g. Solaris) you may get an error like this when
+you try to run \fBpcredemo\fR:
+
+  ld.so.1: a.out: fatal: libpcre.so.0: open failed: No such file or directory
+
+This is caused by the way shared library support works on those systems. You
+need to add
+
+  -R/usr/local/lib
+
+to the compile command to get round this problem.
+
+.in 0
+Last updated: 28 January 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcretest.1 b/external-libs/pcre/doc/pcretest.1
new file mode 100644
index 00000000..f3d69c83
--- /dev/null
+++ b/external-libs/pcre/doc/pcretest.1
@@ -0,0 +1,364 @@
+.TH PCRETEST 1
+.SH NAME
+pcretest - a program for testing Perl-compatible regular expressions.
+.SH SYNOPSIS
+.B pcretest "[-d] [-i] [-m] [-o osize] [-p] [-t] [source] [destination]"
+
+\fBpcretest\fR was written as a test program for the PCRE regular expression
+library itself, but it can also be used for experimenting with regular
+expressions. This document describes the features of the test program; for
+details of the regular expressions themselves, see the
+.\" HREF
+\fBpcrepattern\fR
+.\"
+documentation. For details of PCRE and its options, see the
+.\" HREF
+\fBpcreapi\fR
+.\"
+documentation.
+
+.SH OPTIONS
+.rs
+.sp
+.TP 10
+\fB-C\fR
+Output the version number of the PCRE library, and all available information
+about the optional features that are included, and then exit.
+.TP 10
+\fB-d\fR
+Behave as if each regex had the \fB/D\fR modifier (see below); the internal
+form is output after compilation.
+.TP 10
+\fB-i\fR
+Behave as if each regex had the \fB/I\fR modifier; information about the
+compiled pattern is given after compilation.
+.TP 10
+\fB-m\fR
+Output the size of each compiled pattern after it has been compiled. This is
+equivalent to adding /M to each regular expression. For compatibility with
+earlier versions of pcretest, \fB-s\fR is a synonym for \fB-m\fR.
+.TP 10
+\fB-o\fR \fIosize\fR
+Set the number of elements in the output vector that is used when calling PCRE
+to be \fIosize\fR. The default value is 45, which is enough for 14 capturing
+subexpressions. The vector size can be changed for individual matching calls by
+including \\O in the data line (see below).
+.TP 10
+\fB-p\fR
+Behave as if each regex has \fB/P\fR modifier; the POSIX wrapper API is used
+to call PCRE. None of the other options has any effect when \fB-p\fR is set.
+.TP 10
+\fB-t\fR
+Run each compile, study, and match many times with a timer, and output
+resulting time per compile or match (in milliseconds). Do not set \fB-t\fR with
+\fB-m\fR, because you will then get the size output 20000 times and the timing
+will be distorted.
+
+.SH DESCRIPTION
+.rs
+.sp
+If \fBpcretest\fR is given two filename arguments, it reads from the first and
+writes to the second. If it is given only one filename argument, it reads from
+that file and writes to stdout. Otherwise, it reads from stdin and writes to
+stdout, and prompts for each line of input, using "re>" to prompt for regular
+expressions, and "data>" to prompt for data lines.
+
+The program handles any number of sets of input on a single input file. Each
+set starts with a regular expression, and continues with any number of data
+lines to be matched against the pattern.
+
+Each line is matched separately and independently. If you want to do
+multiple-line matches, you have to use the \\n escape sequence in a single line
+of input to encode the newline characters. The maximum length of data line is
+30,000 characters.
+
+An empty line signals the end of the data lines, at which point a new regular
+expression is read. The regular expressions are given enclosed in any
+non-alphameric delimiters other than backslash, for example
+
+  /(a|bc)x+yz/
+
+White space before the initial delimiter is ignored. A regular expression may
+be continued over several input lines, in which case the newline characters are
+included within it. It is possible to include the delimiter within the pattern
+by escaping it, for example
+
+  /abc\\/def/
+
+If you do so, the escape and the delimiter form part of the pattern, but since
+delimiters are always non-alphameric, this does not affect its interpretation.
+If the terminating delimiter is immediately followed by a backslash, for
+example,
+
+  /abc/\\
+
+then a backslash is added to the end of the pattern. This is done to provide a
+way of testing the error condition that arises if a pattern finishes with a
+backslash, because
+
+  /abc\\/
+
+is interpreted as the first line of a pattern that starts with "abc/", causing
+pcretest to read the next line as a continuation of the regular expression.
+
+.SH PATTERN MODIFIERS
+.rs
+.sp
+The pattern may be followed by \fBi\fR, \fBm\fR, \fBs\fR, or \fBx\fR to set the
+PCRE_CASELESS, PCRE_MULTILINE, PCRE_DOTALL, or PCRE_EXTENDED options,
+respectively. For example:
+
+  /caseless/i
+
+These modifier letters have the same effect as they do in Perl. There are
+others that set PCRE options that do not correspond to anything in Perl:
+\fB/A\fR, \fB/E\fR, \fB/N\fR, \fB/U\fR, and \fB/X\fR set PCRE_ANCHORED,
+PCRE_DOLLAR_ENDONLY, PCRE_NO_AUTO_CAPTURE, PCRE_UNGREEDY, and PCRE_EXTRA
+respectively.
+
+Searching for all possible matches within each subject string can be requested
+by the \fB/g\fR or \fB/G\fR modifier. After finding a match, PCRE is called
+again to search the remainder of the subject string. The difference between
+\fB/g\fR and \fB/G\fR is that the former uses the \fIstartoffset\fR argument to
+\fBpcre_exec()\fR to start searching at a new point within the entire string
+(which is in effect what Perl does), whereas the latter passes over a shortened
+substring. This makes a difference to the matching process if the pattern
+begins with a lookbehind assertion (including \\b or \\B).
+
+If any call to \fBpcre_exec()\fR in a \fB/g\fR or \fB/G\fR sequence matches an
+empty string, the next call is done with the PCRE_NOTEMPTY and PCRE_ANCHORED
+flags set in order to search for another, non-empty, match at the same point.
+If this second match fails, the start offset is advanced by one, and the normal
+match is retried. This imitates the way Perl handles such cases when using the
+\fB/g\fR modifier or the \fBsplit()\fR function.
+
+There are a number of other modifiers for controlling the way \fBpcretest\fR
+operates.
+
+The \fB/+\fR modifier requests that as well as outputting the substring that
+matched the entire pattern, pcretest should in addition output the remainder of
+the subject string. This is useful for tests where the subject contains
+multiple copies of the same substring.
+
+The \fB/L\fR modifier must be followed directly by the name of a locale, for
+example,
+
+  /pattern/Lfr
+
+For this reason, it must be the last modifier letter. The given locale is set,
+\fBpcre_maketables()\fR is called to build a set of character tables for the
+locale, and this is then passed to \fBpcre_compile()\fR when compiling the
+regular expression. Without an \fB/L\fR modifier, NULL is passed as the tables
+pointer; that is, \fB/L\fR applies only to the expression on which it appears.
+
+The \fB/I\fR modifier requests that \fBpcretest\fR output information about the
+compiled expression (whether it is anchored, has a fixed first character, and
+so on). It does this by calling \fBpcre_fullinfo()\fR after compiling an
+expression, and outputting the information it gets back. If the pattern is
+studied, the results of that are also output.
+
+The \fB/D\fR modifier is a PCRE debugging feature, which also assumes \fB/I\fR.
+It causes the internal form of compiled regular expressions to be output after
+compilation. If the pattern was studied, the information returned is also
+output.
+
+The \fB/S\fR modifier causes \fBpcre_study()\fR to be called after the
+expression has been compiled, and the results used when the expression is
+matched.
+
+The \fB/M\fR modifier causes the size of memory block used to hold the compiled
+pattern to be output.
+
+The \fB/P\fR modifier causes \fBpcretest\fR to call PCRE via the POSIX wrapper
+API rather than its native API. When this is done, all other modifiers except
+\fB/i\fR, \fB/m\fR, and \fB/+\fR are ignored. REG_ICASE is set if \fB/i\fR is
+present, and REG_NEWLINE is set if \fB/m\fR is present. The wrapper functions
+force PCRE_DOLLAR_ENDONLY always, and PCRE_DOTALL unless REG_NEWLINE is set.
+
+The \fB/8\fR modifier causes \fBpcretest\fR to call PCRE with the PCRE_UTF8
+option set. This turns on support for UTF-8 character handling in PCRE,
+provided that it was compiled with this support enabled. This modifier also
+causes any non-printing characters in output strings to be printed using the
+\\x{hh...} notation if they are valid UTF-8 sequences.
+
+If the \fB/?\fR modifier is used with \fB/8\fR, it causes \fBpcretest\fR to
+call \fBpcre_compile()\fR with the PCRE_NO_UTF8_CHECK option, to suppress the
+checking of the string for UTF-8 validity.
+
+.SH CALLOUTS
+.rs
+.sp
+If the pattern contains any callout requests, \fBpcretest\fR's callout function
+will be called. By default, it displays the callout number, and the start and
+current positions in the text at the callout time. For example, the output
+
+  --->pqrabcdef
+    0    ^  ^
+
+indicates that callout number 0 occurred for a match attempt starting at the
+fourth character of the subject string, when the pointer was at the seventh
+character. The callout function returns zero (carry on matching) by default.
+
+Inserting callouts may be helpful when using \fBpcretest\fR to check
+complicated regular expressions. For further information about callouts, see
+the
+.\" HREF
+\fBpcrecallout\fR
+.\"
+documentation.
+
+For testing the PCRE library, additional control of callout behaviour is
+available via escape sequences in the data, as described in the following
+section. In particular, it is possible to pass in a number as callout data (the
+default is zero). If the callout function receives a non-zero number, it
+returns that value instead of zero.
+
+.SH DATA LINES
+.rs
+.sp
+Before each data line is passed to \fBpcre_exec()\fR, leading and trailing
+whitespace is removed, and it is then scanned for \\ escapes. Some of these are
+pretty esoteric features, intended for checking out some of the more
+complicated features of PCRE. If you are just testing "ordinary" regular
+expressions, you probably don't need any of these. The following escapes are
+recognized:
+
+  \\a         alarm (= BEL)
+  \\b         backspace
+  \\e         escape
+  \\f         formfeed
+  \\n         newline
+  \\r         carriage return
+  \\t         tab
+  \\v         vertical tab
+  \\nnn       octal character (up to 3 octal digits)
+  \\xhh       hexadecimal character (up to 2 hex digits)
+  \\x{hh...}  hexadecimal character, any number of digits
+               in UTF-8 mode
+  \\A         pass the PCRE_ANCHORED option to \fBpcre_exec()\fR
+  \\B         pass the PCRE_NOTBOL option to \fBpcre_exec()\fR
+  \\Cdd       call pcre_copy_substring() for substring dd
+               after a successful match (any decimal number
+               less than 32)
+  \\Cname     call pcre_copy_named_substring() for substring
+               "name" after a successful match (name termin-
+               ated by next non alphanumeric character)
+  \\C+        show the current captured substrings at callout
+               time
+  \\C-        do not supply a callout function
+  \\C!n       return 1 instead of 0 when callout number n is
+               reached
+  \\C!n!m     return 1 instead of 0 when callout number n is
+               reached for the nth time
+  \\C*n       pass the number n (may be negative) as callout
+               data
+  \\Gdd       call pcre_get_substring() for substring dd
+               after a successful match (any decimal number
+               less than 32)
+  \\Gname     call pcre_get_named_substring() for substring
+               "name" after a successful match (name termin-
+               ated by next non-alphanumeric character)
+  \\L         call pcre_get_substringlist() after a
+               successful match
+  \\M         discover the minimum MATCH_LIMIT setting
+  \\N         pass the PCRE_NOTEMPTY option to \fBpcre_exec()\fR
+  \\Odd       set the size of the output vector passed to
+               \fBpcre_exec()\fR to dd (any number of decimal
+               digits)
+  \\S         output details of memory get/free calls during matching
+  \\Z         pass the PCRE_NOTEOL option to \fBpcre_exec()\fR
+  \\?         pass the PCRE_NO_UTF8_CHECK option to
+               \fBpcre_exec()\fR
+
+If \\M is present, \fBpcretest\fR calls \fBpcre_exec()\fR several times, with
+different values in the \fImatch_limit\fR field of the \fBpcre_extra\fR data
+structure, until it finds the minimum number that is needed for
+\fBpcre_exec()\fR to complete. This number is a measure of the amount of
+recursion and backtracking that takes place, and checking it out can be
+instructive. For most simple matches, the number is quite small, but for
+patterns with very large numbers of matching possibilities, it can become large
+very quickly with increasing length of subject string.
+
+When \\O is used, it may be higher or lower than the size set by the \fB-O\fR
+option (or defaulted to 45); \\O applies only to the call of \fBpcre_exec()\fR
+for the line in which it appears.
+
+A backslash followed by anything else just escapes the anything else. If the
+very last character is a backslash, it is ignored. This gives a way of passing
+an empty line as data, since a real empty line terminates the data input.
+
+If \fB/P\fR was present on the regex, causing the POSIX wrapper API to be used,
+only \fB\B\fR, and \fB\Z\fR have any effect, causing REG_NOTBOL and REG_NOTEOL
+to be passed to \fBregexec()\fR respectively.
+
+The use of \\x{hh...} to represent UTF-8 characters is not dependent on the use
+of the \fB/8\fR modifier on the pattern. It is recognized always. There may be
+any number of hexadecimal digits inside the braces. The result is from one to
+six bytes, encoded according to the UTF-8 rules.
+
+.SH OUTPUT FROM PCRETEST
+.rs
+.sp
+When a match succeeds, pcretest outputs the list of captured substrings that
+\fBpcre_exec()\fR returns, starting with number 0 for the string that matched
+the whole pattern. Here is an example of an interactive pcretest run.
+
+  $ pcretest
+  PCRE version 4.00 08-Jan-2003
+
+    re> /^abc(\\d+)/
+  data> abc123
+   0: abc123
+   1: 123
+  data> xyz
+  No match
+
+If the strings contain any non-printing characters, they are output as \\0x
+escapes, or as \\x{...} escapes if the \fB/8\fR modifier was present on the
+pattern. If the pattern has the \fB/+\fR modifier, then the output for
+substring 0 is followed by the the rest of the subject string, identified by
+"0+" like this:
+
+    re> /cat/+
+  data> cataract
+   0: cat
+   0+ aract
+
+If the pattern has the \fB/g\fR or \fB/G\fR modifier, the results of successive
+matching attempts are output in sequence, like this:
+
+    re> /\\Bi(\\w\\w)/g
+  data> Mississippi
+   0: iss
+   1: ss
+   0: iss
+   1: ss
+   0: ipp
+   1: pp
+
+"No match" is output only if the first match attempt fails.
+
+If any of the sequences \fB\\C\fR, \fB\\G\fR, or \fB\\L\fR are present in a
+data line that is successfully matched, the substrings extracted by the
+convenience functions are output with C, G, or L after the string number
+instead of a colon. This is in addition to the normal full list. The string
+length (that is, the return from the extraction function) is given in
+parentheses after each string for \fB\\C\fR and \fB\\G\fR.
+
+Note that while patterns can be continued over several lines (a plain ">"
+prompt is used for continuations), data lines may not. However newlines can be
+included in data by means of the \\n escape.
+
+.SH AUTHOR
+.rs
+.sp
+Philip Hazel <ph10@cam.ac.uk>
+.br
+University Computing Service,
+.br
+Cambridge CB2 3QG, England.
+
+.in 0
+Last updated: 09 December 2003
+.br
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/pcretest.txt b/external-libs/pcre/doc/pcretest.txt
new file mode 100644
index 00000000..0e9cd138
--- /dev/null
+++ b/external-libs/pcre/doc/pcretest.txt
@@ -0,0 +1,357 @@
+PCRETEST(1)                                                        PCRETEST(1)
+
+
+
+NAME
+       pcretest - a program for testing Perl-compatible regular expressions.
+
+SYNOPSIS
+       pcretest [-d] [-i] [-m] [-o osize] [-p] [-t] [source] [destination]
+
+       pcretest  was written as a test program for the PCRE regular expression
+       library itself, but it can also be used for experimenting with  regular
+       expressions.  This document describes the features of the test program;
+       for details of the regular expressions themselves, see the  pcrepattern
+       documentation.  For  details  of  PCRE and its options, see the pcreapi
+       documentation.
+
+
+OPTIONS
+
+
+       -C        Output the version number of the PCRE library, and all avail-
+                 able   information  about  the  optional  features  that  are
+                 included, and then exit.
+
+       -d        Behave as if each regex had the /D modifier (see below);  the
+                 internal form is output after compilation.
+
+       -i        Behave  as  if  each  regex  had the /I modifier; information
+                 about the compiled pattern is given after compilation.
+
+       -m        Output the size of each compiled pattern after  it  has  been
+                 compiled.  This  is  equivalent  to adding /M to each regular
+                 expression.  For  compatibility  with  earlier  versions   of
+                 pcretest, -s is a synonym for -m.
+
+       -o osize  Set  the number of elements in the output vector that is used
+                 when calling PCRE to be osize. The default value is 45, which
+                 is  enough  for  14 capturing subexpressions. The vector size
+                 can be changed for individual matching calls by including  \O
+                 in the data line (see below).
+
+       -p        Behave  as  if  each regex has /P modifier; the POSIX wrapper
+                 API is used to call PCRE. None of the other options  has  any
+                 effect when -p is set.
+
+       -t        Run  each  compile, study, and match many times with a timer,
+                 and output resulting time per compile or match (in  millisec-
+                 onds).  Do  not set -t with -m, because you will then get the
+                 size output 20000 times and the timing will be distorted.
+
+
+DESCRIPTION
+
+       If pcretest is given two filename arguments, it reads  from  the  first
+       and writes to the second. If it is given only one filename argument, it
+       reads from that file and writes to stdout.  Otherwise,  it  reads  from
+       stdin  and  writes to stdout, and prompts for each line of input, using
+       "re>" to prompt for regular expressions, and "data>" to prompt for data
+       lines.
+
+       The program handles any number of sets of input on a single input file.
+       Each set starts with a regular expression, and continues with any  num-
+       ber of data lines to be matched against the pattern.
+
+       Each  line  is  matched separately and independently. If you want to do
+       multiple-line matches, you have to use the \n escape sequence in a sin-
+       gle  line of input to encode the newline characters. The maximum length
+       of data line is 30,000 characters.
+
+       An empty line signals the end of the data lines, at which point  a  new
+       regular  expression is read. The regular expressions are given enclosed
+       in any non-alphameric delimiters other than backslash, for example
+
+         /(a|bc)x+yz/
+
+       White space before the initial delimiter is ignored. A regular  expres-
+       sion  may be continued over several input lines, in which case the new-
+       line characters are included within it. It is possible to  include  the
+       delimiter within the pattern by escaping it, for example
+
+         /abc\/def/
+
+       If  you  do  so, the escape and the delimiter form part of the pattern,
+       but since delimiters are always non-alphameric, this  does  not  affect
+       its  interpretation.   If the terminating delimiter is immediately fol-
+       lowed by a backslash, for example,
+
+         /abc/\
+
+       then a backslash is added to the end of the pattern. This  is  done  to
+       provide  a  way of testing the error condition that arises if a pattern
+       finishes with a backslash, because
+
+         /abc\/
+
+       is interpreted as the first line of a pattern that starts with  "abc/",
+       causing pcretest to read the next line as a continuation of the regular
+       expression.
+
+
+PATTERN MODIFIERS
+
+       The pattern may be followed by i, m, s, or x to set the  PCRE_CASELESS,
+       PCRE_MULTILINE,  PCRE_DOTALL,  or  PCRE_EXTENDED options, respectively.
+       For example:
+
+         /caseless/i
+
+       These modifier letters have the same effect as they do in  Perl.  There
+       are  others that set PCRE options that do not correspond to anything in
+       Perl: /A, /E, /N, /U, and /X  set  PCRE_ANCHORED,  PCRE_DOLLAR_ENDONLY,
+       PCRE_NO_AUTO_CAPTURE, PCRE_UNGREEDY, and PCRE_EXTRA respectively.
+
+       Searching  for  all  possible matches within each subject string can be
+       requested by the /g or /G modifier. After  finding  a  match,  PCRE  is
+       called again to search the remainder of the subject string. The differ-
+       ence between /g and /G is that the former uses the startoffset argument
+       to  pcre_exec()  to  start  searching  at a new point within the entire
+       string (which is in effect what Perl does), whereas the  latter  passes
+       over  a  shortened  substring.  This makes a difference to the matching
+       process if the pattern begins with a lookbehind assertion (including \b
+       or \B).
+
+       If  any  call  to  pcre_exec()  in a /g or /G sequence matches an empty
+       string, the next call is done with the PCRE_NOTEMPTY and  PCRE_ANCHORED
+       flags  set in order to search for another, non-empty, match at the same
+       point.  If this second match fails, the start  offset  is  advanced  by
+       one,  and  the normal match is retried. This imitates the way Perl han-
+       dles such cases when using the /g modifier or the split() function.
+
+       There are a number of other modifiers for controlling the way  pcretest
+       operates.
+
+       The  /+ modifier requests that as well as outputting the substring that
+       matched the entire pattern, pcretest  should  in  addition  output  the
+       remainder  of  the  subject  string. This is useful for tests where the
+       subject contains multiple copies of the same substring.
+
+       The /L modifier must be followed directly by the name of a locale,  for
+       example,
+
+         /pattern/Lfr
+
+       For  this reason, it must be the last modifier letter. The given locale
+       is set, pcre_maketables() is called to build a set of character  tables
+       for  the locale, and this is then passed to pcre_compile() when compil-
+       ing the regular expression. Without an /L modifier, NULL is  passed  as
+       the tables pointer; that is, /L applies only to the expression on which
+       it appears.
+
+       The /I modifier requests that pcretest  output  information  about  the
+       compiled  expression (whether it is anchored, has a fixed first charac-
+       ter, and so on). It does this by calling pcre_fullinfo() after  compil-
+       ing  an expression, and outputting the information it gets back. If the
+       pattern is studied, the results of that are also output.
+
+       The /D modifier is a PCRE debugging feature, which also assumes /I.  It
+       causes  the  internal form of compiled regular expressions to be output
+       after compilation. If the pattern was studied, the information returned
+       is also output.
+
+       The  /S  modifier causes pcre_study() to be called after the expression
+       has been compiled, and the results used when the expression is matched.
+
+       The  /M  modifier causes the size of memory block used to hold the com-
+       piled pattern to be output.
+
+       The /P modifier causes pcretest to call PCRE via the POSIX wrapper  API
+       rather  than  its  native  API.  When this is done, all other modifiers
+       except /i, /m, and /+ are ignored. REG_ICASE is set if /i  is  present,
+       and  REG_NEWLINE  is  set if /m is present. The wrapper functions force
+       PCRE_DOLLAR_ENDONLY always, and PCRE_DOTALL unless REG_NEWLINE is  set.
+
+       The  /8 modifier causes pcretest to call PCRE with the PCRE_UTF8 option
+       set. This turns on support for UTF-8 character handling in  PCRE,  pro-
+       vided  that  it  was  compiled with this support enabled. This modifier
+       also causes any non-printing characters in output strings to be printed
+       using the \x{hh...} notation if they are valid UTF-8 sequences.
+
+       If  the  /?  modifier  is  used  with  /8,  it  causes pcretest to call
+       pcre_compile() with the  PCRE_NO_UTF8_CHECK  option,  to  suppress  the
+       checking of the string for UTF-8 validity.
+
+
+CALLOUTS
+
+       If  the pattern contains any callout requests, pcretest's callout func-
+       tion will be called. By default, it displays the  callout  number,  and
+       the  start  and  current positions in the text at the callout time. For
+       example, the output
+
+         --->pqrabcdef
+           0    ^  ^
+
+       indicates that callout number 0 occurred for a match  attempt  starting
+       at  the fourth character of the subject string, when the pointer was at
+       the seventh character. The callout  function  returns  zero  (carry  on
+       matching) by default.
+
+       Inserting  callouts may be helpful when using pcretest to check compli-
+       cated regular expressions. For further information about callouts,  see
+       the pcrecallout documentation.
+
+       For  testing  the PCRE library, additional control of callout behaviour
+       is available via escape sequences in the data, as described in the fol-
+       lowing  section.  In  particular, it is possible to pass in a number as
+       callout data (the default is zero). If the callout function receives  a
+       non-zero number, it returns that value instead of zero.
+
+
+DATA LINES
+
+       Before  each  data  line is passed to pcre_exec(), leading and trailing
+       whitespace is removed, and it is then scanned for \  escapes.  Some  of
+       these  are  pretty esoteric features, intended for checking out some of
+       the more complicated features of PCRE. If you are just  testing  "ordi-
+       nary"  regular  expressions,  you probably don't need any of these. The
+       following escapes are recognized:
+
+         \a         alarm (= BEL)
+         \b         backspace
+         \e         escape
+         \f         formfeed
+         \n         newline
+         \r         carriage return
+         \t         tab
+         \v         vertical tab
+         \nnn       octal character (up to 3 octal digits)
+         \xhh       hexadecimal character (up to 2 hex digits)
+         \x{hh...}  hexadecimal character, any number of digits
+                      in UTF-8 mode
+         \A         pass the PCRE_ANCHORED option to pcre_exec()
+         \B         pass the PCRE_NOTBOL option to pcre_exec()
+         \Cdd       call pcre_copy_substring() for substring dd
+                      after a successful match (any decimal number
+                      less than 32)
+         \Cname     call pcre_copy_named_substring() for substring
+                      "name" after a successful match (name termin-
+                      ated by next non alphanumeric character)
+         \C+        show the current captured substrings at callout
+                      time
+         \C-        do not supply a callout function
+         \C!n       return 1 instead of 0 when callout number n is
+                      reached
+         \C!n!m     return 1 instead of 0 when callout number n is
+                      reached for the nth time
+         \C*n       pass the number n (may be negative) as callout
+                      data
+         \Gdd       call pcre_get_substring() for substring dd
+                      after a successful match (any decimal number
+                      less than 32)
+         \Gname     call pcre_get_named_substring() for substring
+                      "name" after a successful match (name termin-
+                      ated by next non-alphanumeric character)
+         \L         call pcre_get_substringlist() after a
+                      successful match
+         \M         discover the minimum MATCH_LIMIT setting
+         \N         pass the PCRE_NOTEMPTY option to pcre_exec()
+         \Odd       set the size of the output vector passed to
+                      pcre_exec() to dd (any number of decimal
+                      digits)
+         \S         output details of memory get/free calls during matching
+         \Z         pass the PCRE_NOTEOL option to pcre_exec()
+         \?         pass the PCRE_NO_UTF8_CHECK option to
+                      pcre_exec()
+
+       If \M is present, pcretest calls pcre_exec() several times,  with  dif-
+       ferent  values  in  the match_limit field of the pcre_extra data struc-
+       ture, until it finds the minimum number that is needed for  pcre_exec()
+       to  complete.  This  number is a measure of the amount of recursion and
+       backtracking that takes place, and checking it out can be  instructive.
+       For  most  simple  matches, the number is quite small, but for patterns
+       with very large numbers of matching possibilities, it can become  large
+       very quickly with increasing length of subject string.
+
+       When  \O is used, it may be higher or lower than the size set by the -O
+       option (or defaulted to 45); \O applies only to the call of pcre_exec()
+       for the line in which it appears.
+
+       A  backslash  followed by anything else just escapes the anything else.
+       If the very last character is a backslash, it is ignored. This gives  a
+       way  of  passing  an empty line as data, since a real empty line termi-
+       nates the data input.
+
+       If /P was present on the regex, causing the POSIX  wrapper  API  to  be
+       used,  only  0  causing  REG_NOTBOL  and  REG_NOTEOL  to  be  passed to
+       regexec() respectively.
+
+       The use of \x{hh...} to represent UTF-8 characters is not dependent  on
+       the  use  of  the  /8 modifier on the pattern. It is recognized always.
+       There may be any number of hexadecimal digits inside  the  braces.  The
+       result  is from one to six bytes, encoded according to the UTF-8 rules.
+
+
+OUTPUT FROM PCRETEST
+
+       When a match succeeds, pcretest outputs the list of captured substrings
+       that  pcre_exec()  returns,  starting with number 0 for the string that
+       matched the whole  pattern.  Here  is  an  example  of  an  interactive
+       pcretest run.
+
+         $ pcretest
+         PCRE version 4.00 08-Jan-2003
+
+           re> /^abc(\d+)/
+         data> abc123
+          0: abc123
+          1: 123
+         data> xyz
+         No match
+
+       If  the strings contain any non-printing characters, they are output as
+       \0x escapes, or as \x{...} escapes if the /8 modifier  was  present  on
+       the  pattern.  If  the pattern has the /+ modifier, then the output for
+       substring 0 is followed by the the rest of the subject string,  identi-
+       fied by "0+" like this:
+
+           re> /cat/+
+         data> cataract
+          0: cat
+          0+ aract
+
+       If  the  pattern  has  the /g or /G modifier, the results of successive
+       matching attempts are output in sequence, like this:
+
+           re> /\Bi(\w\w)/g
+         data> Mississippi
+          0: iss
+          1: ss
+          0: iss
+          1: ss
+          0: ipp
+          1: pp
+
+       "No match" is output only if the first match attempt fails.
+
+       If any of the sequences \C, \G, or \L are present in a data  line  that
+       is  successfully  matched,  the substrings extracted by the convenience
+       functions are output with C, G, or L after the string number instead of
+       a colon. This is in addition to the normal full list. The string length
+       (that is, the return from the extraction function) is given  in  paren-
+       theses after each string for \C and \G.
+
+       Note  that  while patterns can be continued over several lines (a plain
+       ">" prompt is used for continuations), data lines may not. However new-
+       lines can be included in data by means of the \n escape.
+
+
+AUTHOR
+
+       Philip Hazel <ph10@cam.ac.uk>
+       University Computing Service,
+       Cambridge CB2 3QG, England.
+
+Last updated: 09 December 2003
+Copyright (c) 1997-2003 University of Cambridge.
diff --git a/external-libs/pcre/doc/perltest.txt b/external-libs/pcre/doc/perltest.txt
new file mode 100644
index 00000000..9ea9d932
--- /dev/null
+++ b/external-libs/pcre/doc/perltest.txt
@@ -0,0 +1,34 @@
+The perltest program
+--------------------
+
+The perltest program tests Perl's regular expressions; it has the same
+specification as pcretest, and so can be given identical input, except that
+input patterns can be followed only by Perl's lower case modifiers and /+ (as
+used by pcretest), which is recognized and handled by the program.
+
+The data lines are processed as Perl double-quoted strings, so if they contain
+" \ $ or @ characters, these have to be escaped. For this reason, all such
+characters in testinput1 and testinput3 are escaped so that they can be used
+for perltest as well as for pcretest, and the special upper case modifiers such
+as /A that pcretest recognizes are not used in these files. The output should
+be identical, apart from the initial identifying banner.
+
+The perltest script can also test UTF-8 features. It works as is for Perl 5.8
+or higher. It recognizes the special modifier /8 that pcretest uses to invoke
+UTF-8 functionality. The testinput5 file can be fed to perltest to run UTF-8
+tests.
+
+For Perl 5.6, perltest won't work unmodified for the UTF-8 tests. You need to
+uncomment the "use utf8" lines that it contains. It is best to do this on a
+copy of the script, because for non-UTF-8 tests, these lines should remain
+commented out.
+
+The testinput2 and testinput4 files are not suitable for feeding to perltest,
+since they do make use of the special upper case modifiers and escapes that
+pcretest uses to test some features of PCRE. The first of these files also
+contains malformed regular expressions, in order to check that PCRE diagnoses
+them correctly. Similarly, testinput6 tests UTF-8 features that do not relate
+to Perl.
+
+Philip Hazel <ph10@cam.ac.uk>
+August 2002
diff --git a/external-libs/pcre/get.c b/external-libs/pcre/get.c
new file mode 100644
index 00000000..a20473cf
--- /dev/null
+++ b/external-libs/pcre/get.c
@@ -0,0 +1,349 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+/* This module contains some convenience functions for extracting substrings
+from the subject string after a regex match has succeeded. The original idea
+for these functions came from Scott Wimer <scottw@cgibuilder.com>. */
+
+
+/* Include the internals header, which itself includes Standard C headers plus
+the external pcre header. */
+
+#include "internal.h"
+
+
+/*************************************************
+*           Find number for named string         *
+*************************************************/
+
+/* This function is used by the two extraction functions below, as well
+as being generally available.
+
+Arguments:
+  code        the compiled regex
+  stringname  the name whose number is required
+
+Returns:      the number of the named parentheses, or a negative number
+                (PCRE_ERROR_NOSUBSTRING) if not found
+*/
+
+int
+pcre_get_stringnumber(const pcre *code, const char *stringname)
+{
+int rc;
+int entrysize;
+int top, bot;
+uschar *nametable;
+
+if ((rc = pcre_fullinfo(code, NULL, PCRE_INFO_NAMECOUNT, &top)) != 0)
+  return rc;
+if (top <= 0) return PCRE_ERROR_NOSUBSTRING;
+
+if ((rc = pcre_fullinfo(code, NULL, PCRE_INFO_NAMEENTRYSIZE, &entrysize)) != 0)
+  return rc;
+if ((rc = pcre_fullinfo(code, NULL, PCRE_INFO_NAMETABLE, &nametable)) != 0)
+  return rc;
+
+bot = 0;
+while (top > bot)
+  {
+  int mid = (top + bot) / 2;
+  uschar *entry = nametable + entrysize*mid;
+  int c = strcmp(stringname, (char *)(entry + 2));
+  if (c == 0) return (entry[0] << 8) + entry[1];
+  if (c > 0) bot = mid + 1; else top = mid;
+  }
+
+return PCRE_ERROR_NOSUBSTRING;
+}
+
+
+
+/*************************************************
+*      Copy captured string to given buffer      *
+*************************************************/
+
+/* This function copies a single captured substring into a given buffer.
+Note that we use memcpy() rather than strncpy() in case there are binary zeros
+in the string.
+
+Arguments:
+  subject        the subject string that was matched
+  ovector        pointer to the offsets table
+  stringcount    the number of substrings that were captured
+                   (i.e. the yield of the pcre_exec call, unless
+                   that was zero, in which case it should be 1/3
+                   of the offset table size)
+  stringnumber   the number of the required substring
+  buffer         where to put the substring
+  size           the size of the buffer
+
+Returns:         if successful:
+                   the length of the copied string, not including the zero
+                   that is put on the end; can be zero
+                 if not successful:
+                   PCRE_ERROR_NOMEMORY (-6) buffer too small
+                   PCRE_ERROR_NOSUBSTRING (-7) no such captured substring
+*/
+
+int
+pcre_copy_substring(const char *subject, int *ovector, int stringcount,
+  int stringnumber, char *buffer, int size)
+{
+int yield;
+if (stringnumber < 0 || stringnumber >= stringcount)
+  return PCRE_ERROR_NOSUBSTRING;
+stringnumber *= 2;
+yield = ovector[stringnumber+1] - ovector[stringnumber];
+if (size < yield + 1) return PCRE_ERROR_NOMEMORY;
+memcpy(buffer, subject + ovector[stringnumber], yield);
+buffer[yield] = 0;
+return yield;
+}
+
+
+
+/*************************************************
+*   Copy named captured string to given buffer   *
+*************************************************/
+
+/* This function copies a single captured substring into a given buffer,
+identifying it by name.
+
+Arguments:
+  code           the compiled regex
+  subject        the subject string that was matched
+  ovector        pointer to the offsets table
+  stringcount    the number of substrings that were captured
+                   (i.e. the yield of the pcre_exec call, unless
+                   that was zero, in which case it should be 1/3
+                   of the offset table size)
+  stringname     the name of the required substring
+  buffer         where to put the substring
+  size           the size of the buffer
+
+Returns:         if successful:
+                   the length of the copied string, not including the zero
+                   that is put on the end; can be zero
+                 if not successful:
+                   PCRE_ERROR_NOMEMORY (-6) buffer too small
+                   PCRE_ERROR_NOSUBSTRING (-7) no such captured substring
+*/
+
+int
+pcre_copy_named_substring(const pcre *code, const char *subject, int *ovector,
+  int stringcount, const char *stringname, char *buffer, int size)
+{
+int n = pcre_get_stringnumber(code, stringname);
+if (n <= 0) return n;
+return pcre_copy_substring(subject, ovector, stringcount, n, buffer, size);
+}
+
+
+
+/*************************************************
+*      Copy all captured strings to new store    *
+*************************************************/
+
+/* This function gets one chunk of store and builds a list of pointers and all
+of the captured substrings in it. A NULL pointer is put on the end of the list.
+
+Arguments:
+  subject        the subject string that was matched
+  ovector        pointer to the offsets table
+  stringcount    the number of substrings that were captured
+                   (i.e. the yield of the pcre_exec call, unless
+                   that was zero, in which case it should be 1/3
+                   of the offset table size)
+  listptr        set to point to the list of pointers
+
+Returns:         if successful: 0
+                 if not successful:
+                   PCRE_ERROR_NOMEMORY (-6) failed to get store
+*/
+
+int
+pcre_get_substring_list(const char *subject, int *ovector, int stringcount,
+  const char ***listptr)
+{
+int i;
+int size = sizeof(char *);
+int double_count = stringcount * 2;
+char **stringlist;
+char *p;
+
+for (i = 0; i < double_count; i += 2)
+  size += sizeof(char *) + ovector[i+1] - ovector[i] + 1;
+
+stringlist = (char **)(pcre_malloc)(size);
+if (stringlist == NULL) return PCRE_ERROR_NOMEMORY;
+
+*listptr = (const char **)stringlist;
+p = (char *)(stringlist + stringcount + 1);
+
+for (i = 0; i < double_count; i += 2)
+  {
+  int len = ovector[i+1] - ovector[i];
+  memcpy(p, subject + ovector[i], len);
+  *stringlist++ = p;
+  p += len;
+  *p++ = 0;
+  }
+
+*stringlist = NULL;
+return 0;
+}
+
+
+
+/*************************************************
+*   Free store obtained by get_substring_list    *
+*************************************************/
+
+/* This function exists for the benefit of people calling PCRE from non-C
+programs that can call its functions, but not free() or (pcre_free)() directly.
+
+Argument:   the result of a previous pcre_get_substring_list()
+Returns:    nothing
+*/
+
+void
+pcre_free_substring_list(const char **pointer)
+{
+(pcre_free)((void *)pointer);
+}
+
+
+
+/*************************************************
+*      Copy captured string to new store         *
+*************************************************/
+
+/* This function copies a single captured substring into a piece of new
+store
+
+Arguments:
+  subject        the subject string that was matched
+  ovector        pointer to the offsets table
+  stringcount    the number of substrings that were captured
+                   (i.e. the yield of the pcre_exec call, unless
+                   that was zero, in which case it should be 1/3
+                   of the offset table size)
+  stringnumber   the number of the required substring
+  stringptr      where to put a pointer to the substring
+
+Returns:         if successful:
+                   the length of the string, not including the zero that
+                   is put on the end; can be zero
+                 if not successful:
+                   PCRE_ERROR_NOMEMORY (-6) failed to get store
+                   PCRE_ERROR_NOSUBSTRING (-7) substring not present
+*/
+
+int
+pcre_get_substring(const char *subject, int *ovector, int stringcount,
+  int stringnumber, const char **stringptr)
+{
+int yield;
+char *substring;
+if (stringnumber < 0 || stringnumber >= stringcount)
+  return PCRE_ERROR_NOSUBSTRING;
+stringnumber *= 2;
+yield = ovector[stringnumber+1] - ovector[stringnumber];
+substring = (char *)(pcre_malloc)(yield + 1);
+if (substring == NULL) return PCRE_ERROR_NOMEMORY;
+memcpy(substring, subject + ovector[stringnumber], yield);
+substring[yield] = 0;
+*stringptr = substring;
+return yield;
+}
+
+
+
+/*************************************************
+*   Copy named captured string to new store      *
+*************************************************/
+
+/* This function copies a single captured substring, identified by name, into
+new store.
+
+Arguments:
+  code           the compiled regex
+  subject        the subject string that was matched
+  ovector        pointer to the offsets table
+  stringcount    the number of substrings that were captured
+                   (i.e. the yield of the pcre_exec call, unless
+                   that was zero, in which case it should be 1/3
+                   of the offset table size)
+  stringname     the name of the required substring
+  stringptr      where to put the pointer
+
+Returns:         if successful:
+                   the length of the copied string, not including the zero
+                   that is put on the end; can be zero
+                 if not successful:
+                   PCRE_ERROR_NOMEMORY (-6) couldn't get memory
+                   PCRE_ERROR_NOSUBSTRING (-7) no such captured substring
+*/
+
+int
+pcre_get_named_substring(const pcre *code, const char *subject, int *ovector,
+  int stringcount, const char *stringname, const char **stringptr)
+{
+int n = pcre_get_stringnumber(code, stringname);
+if (n <= 0) return n;
+return pcre_get_substring(subject, ovector, stringcount, n, stringptr);
+}
+
+
+
+
+/*************************************************
+*       Free store obtained by get_substring     *
+*************************************************/
+
+/* This function exists for the benefit of people calling PCRE from non-C
+programs that can call its functions, but not free() or (pcre_free)() directly.
+
+Argument:   the result of a previous pcre_get_substring()
+Returns:    nothing
+*/
+
+void
+pcre_free_substring(const char *pointer)
+{
+(pcre_free)((void *)pointer);
+}
+
+/* End of get.c */
diff --git a/external-libs/pcre/install-sh b/external-libs/pcre/install-sh
new file mode 100644
index 00000000..e9de2384
--- /dev/null
+++ b/external-libs/pcre/install-sh
@@ -0,0 +1,251 @@
+#!/bin/sh
+#
+# install - install a program, script, or datafile
+# This comes from X11R5 (mit/util/scripts/install.sh).
+#
+# Copyright 1991 by the Massachusetts Institute of Technology
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission.  M.I.T. makes no representations about the
+# suitability of this software for any purpose.  It is provided "as is"
+# without express or implied warranty.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.  It can only install one file at a time, a restriction
+# shared with many OS's install programs.
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+mkdirprog="${MKDIRPROG-mkdir}"
+
+transformbasename=""
+transform_arg=""
+instcmd="$mvprog"
+chmodcmd="$chmodprog 0755"
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+dir_arg=""
+
+while [ x"$1" != x ]; do
+    case $1 in
+	-c) instcmd="$cpprog"
+	    shift
+	    continue;;
+
+	-d) dir_arg=true
+	    shift
+	    continue;;
+
+	-m) chmodcmd="$chmodprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-o) chowncmd="$chownprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-g) chgrpcmd="$chgrpprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-s) stripcmd="$stripprog"
+	    shift
+	    continue;;
+
+	-t=*) transformarg=`echo $1 | sed 's/-t=//'`
+	    shift
+	    continue;;
+
+	-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
+	    shift
+	    continue;;
+
+	*)  if [ x"$src" = x ]
+	    then
+		src=$1
+	    else
+		# this colon is to work around a 386BSD /bin/sh bug
+		:
+		dst=$1
+	    fi
+	    shift
+	    continue;;
+    esac
+done
+
+if [ x"$src" = x ]
+then
+	echo "install:	no input file specified"
+	exit 1
+else
+	true
+fi
+
+if [ x"$dir_arg" != x ]; then
+	dst=$src
+	src=""
+	
+	if [ -d $dst ]; then
+		instcmd=:
+		chmodcmd=""
+	else
+		instcmd=mkdir
+	fi
+else
+
+# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
+# might cause directories to be created, which would be especially bad 
+# if $src (and thus $dsttmp) contains '*'.
+
+	if [ -f $src -o -d $src ]
+	then
+		true
+	else
+		echo "install:  $src does not exist"
+		exit 1
+	fi
+	
+	if [ x"$dst" = x ]
+	then
+		echo "install:	no destination specified"
+		exit 1
+	else
+		true
+	fi
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+	if [ -d $dst ]
+	then
+		dst="$dst"/`basename $src`
+	else
+		true
+	fi
+fi
+
+## this sed command emulates the dirname command
+dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+
+# Make sure that the destination directory exists.
+#  this part is taken from Noah Friedman's mkinstalldirs script
+
+# Skip lots of stat calls in the usual case.
+if [ ! -d "$dstdir" ]; then
+defaultIFS='	
+'
+IFS="${IFS-${defaultIFS}}"
+
+oIFS="${IFS}"
+# Some sh's can't handle IFS=/ for some reason.
+IFS='%'
+set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
+IFS="${oIFS}"
+
+pathcomp=''
+
+while [ $# -ne 0 ] ; do
+	pathcomp="${pathcomp}${1}"
+	shift
+
+	if [ ! -d "${pathcomp}" ] ;
+        then
+		$mkdirprog "${pathcomp}"
+	else
+		true
+	fi
+
+	pathcomp="${pathcomp}/"
+done
+fi
+
+if [ x"$dir_arg" != x ]
+then
+	$doit $instcmd $dst &&
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
+else
+
+# If we're going to rename the final executable, determine the name now.
+
+	if [ x"$transformarg" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		dstfile=`basename $dst $transformbasename | 
+			sed $transformarg`$transformbasename
+	fi
+
+# don't allow the sed command to completely eliminate the filename
+
+	if [ x"$dstfile" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		true
+	fi
+
+# Make a temp file name in the proper directory.
+
+	dsttmp=$dstdir/#inst.$$#
+
+# Move or copy the file name to the temp name
+
+	$doit $instcmd $src $dsttmp &&
+
+	trap "rm -f ${dsttmp}" 0 &&
+
+# and set any options; do chmod last to preserve setuid bits
+
+# If any of these fail, we abort the whole thing.  If we want to
+# ignore errors from any of these, just make sure not to ignore
+# errors from the above "$doit $instcmd $src $dsttmp" command.
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
+
+# Now rename the file to the real destination.
+
+	$doit $rmcmd -f $dstdir/$dstfile &&
+	$doit $mvcmd $dsttmp $dstdir/$dstfile 
+
+fi &&
+
+
+exit 0
diff --git a/external-libs/pcre/internal.h b/external-libs/pcre/internal.h
new file mode 100644
index 00000000..d616b2dc
--- /dev/null
+++ b/external-libs/pcre/internal.h
@@ -0,0 +1,677 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+
+/* This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+/* This header contains definitions that are shared between the different
+modules, but which are not relevant to the outside. */
+
+/* Get the definitions provided by running "configure" */
+
+#include "config.h"
+
+/* Standard C headers plus the external interface definition. The only time
+setjmp and stdarg are used is when NO_RECURSE is set. */
+
+#include <ctype.h>
+#include <limits.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef PCRE_SPY
+#define PCRE_DEFINITION       /* Win32 __declspec(export) trigger for .dll */
+#endif
+
+#include "pcre.h"
+
+/* When compiling for use with the Virtual Pascal compiler, these functions
+need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
+option on the command line. */
+
+#ifdef VPCOMPAT
+#define strncmp(s1,s2,m) _strncmp(s1,s2,m)
+#define memcpy(d,s,n)    _memcpy(d,s,n)
+#define memmove(d,s,n)   _memmove(d,s,n)
+#define memset(s,c,n)    _memset(s,c,n)
+#else  /* VPCOMPAT */
+
+/* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
+define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
+is set. Otherwise, include an emulating function for those systems that have
+neither (there some non-Unix environments where this is the case). This assumes
+that all calls to memmove are moving strings upwards in store, which is the
+case in PCRE. */
+
+#if ! HAVE_MEMMOVE
+#undef  memmove        /* some systems may have a macro */
+#if HAVE_BCOPY
+#define memmove(a, b, c) bcopy(b, a, c)
+#else  /* HAVE_BCOPY */
+void *
+pcre_memmove(unsigned char *dest, const unsigned char *src, size_t n)
+{
+int i;
+dest += n;
+src += n;
+for (i = 0; i < n; ++i) *(--dest) =  *(--src);
+}
+#define memmove(a, b, c) pcre_memmove(a, b, c)
+#endif   /* not HAVE_BCOPY */
+#endif   /* not HAVE_MEMMOVE */
+#endif   /* not VPCOMPAT */
+
+
+/* PCRE keeps offsets in its compiled code as 2-byte quantities by default.
+These are used, for example, to link from the start of a subpattern to its
+alternatives and its end. The use of 2 bytes per offset limits the size of the
+compiled regex to around 64K, which is big enough for almost everybody.
+However, I received a request for an even bigger limit. For this reason, and
+also to make the code easier to maintain, the storing and loading of offsets
+from the byte string is now handled by the macros that are defined here.
+
+The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
+the config.h file, but can be overridden by using -D on the command line. This
+is automated on Unix systems via the "configure" command. */
+
+#if LINK_SIZE == 2
+
+#define PUT(a,n,d)   \
+  (a[n] = (d) >> 8), \
+  (a[(n)+1] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 8) | (a)[(n)+1])
+
+#define MAX_PATTERN_SIZE (1 << 16)
+
+
+#elif LINK_SIZE == 3
+
+#define PUT(a,n,d)       \
+  (a[n] = (d) >> 16),    \
+  (a[(n)+1] = (d) >> 8), \
+  (a[(n)+2] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
+
+#define MAX_PATTERN_SIZE (1 << 24)
+
+
+#elif LINK_SIZE == 4
+
+#define PUT(a,n,d)        \
+  (a[n] = (d) >> 24),     \
+  (a[(n)+1] = (d) >> 16), \
+  (a[(n)+2] = (d) >> 8),  \
+  (a[(n)+3] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
+
+#define MAX_PATTERN_SIZE (1 << 30)   /* Keep it positive */
+
+
+#else
+#error LINK_SIZE must be either 2, 3, or 4
+#endif
+
+
+/* Convenience macro defined in terms of the others */
+
+#define PUTINC(a,n,d)   PUT(a,n,d), a += LINK_SIZE
+
+
+/* PCRE uses some other 2-byte quantities that do not change when the size of
+offsets changes. There are used for repeat counts and for other things such as
+capturing parenthesis numbers in back references. */
+
+#define PUT2(a,n,d)   \
+  a[n] = (d) >> 8; \
+  a[(n)+1] = (d) & 255
+
+#define GET2(a,n) \
+  (((a)[n] << 8) | (a)[(n)+1])
+
+#define PUT2INC(a,n,d)  PUT2(a,n,d), a += 2
+
+
+/* In case there is no definition of offsetof() provided - though any proper
+Standard C system should have one. */
+
+#ifndef offsetof
+#define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
+#endif
+
+/* These are the public options that can change during matching. */
+
+#define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
+
+/* Private options flags start at the most significant end of the four bytes,
+but skip the top bit so we can use ints for convenience without getting tangled
+with negative values. The public options defined in pcre.h start at the least
+significant end. Make sure they don't overlap, though now that we have expanded
+to four bytes there is plenty of space. */
+
+#define PCRE_FIRSTSET      0x40000000  /* first_byte is set */
+#define PCRE_REQCHSET      0x20000000  /* req_byte is set */
+#define PCRE_STARTLINE     0x10000000  /* start after \n for multiline */
+#define PCRE_ICHANGED      0x08000000  /* i option changes within regex */
+
+/* Options for the "extra" block produced by pcre_study(). */
+
+#define PCRE_STUDY_MAPPED   0x01     /* a map of starting chars exists */
+
+/* Masks for identifying the public options which are permitted at compile
+time, run time or study time, respectively. */
+
+#define PUBLIC_OPTIONS \
+  (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
+   PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
+   PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK)
+
+#define PUBLIC_EXEC_OPTIONS \
+  (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK)
+
+#define PUBLIC_STUDY_OPTIONS 0   /* None defined */
+
+/* Magic number to provide a small check against being handed junk. */
+
+#define MAGIC_NUMBER  0x50435245UL   /* 'PCRE' */
+
+/* Negative values for the firstchar and reqchar variables */
+
+#define REQ_UNSET (-2)
+#define REQ_NONE  (-1)
+
+/* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
+variable-length repeat, or a anything other than literal characters. */
+
+#define REQ_CASELESS 0x0100    /* indicates caselessness */
+#define REQ_VARY     0x0200    /* reqbyte followed non-literal item */
+
+/* Miscellaneous definitions */
+
+typedef int BOOL;
+
+#define FALSE   0
+#define TRUE    1
+
+/* Escape items that are just an encoding of a particular data value. Note that
+ESC_n is defined as yet another macro, which is set in config.h to either \n
+(the default) or \r (which some people want). */
+
+#ifndef ESC_e
+#define ESC_e 27
+#endif
+
+#ifndef ESC_f
+#define ESC_f '\f'
+#endif
+
+#ifndef ESC_n
+#define ESC_n NEWLINE
+#endif
+
+#ifndef ESC_r
+#define ESC_r '\r'
+#endif
+
+/* We can't officially use ESC_t because it is a POSIX reserved identifier
+(presumably because of all the others like size_t). */
+
+#ifndef ESC_tee
+#define ESC_tee '\t'
+#endif
+
+/* These are escaped items that aren't just an encoding of a particular data
+value such as \n. They must have non-zero values, as check_escape() returns
+their negation. Also, they must appear in the same order as in the opcode
+definitions below, up to ESC_z. There's a dummy for OP_ANY because it
+corresponds to "." rather than an escape sequence. The final one must be
+ESC_REF as subsequent values are used for \1, \2, \3, etc. There is are two
+tests in the code for an escape greater than ESC_b and less than ESC_Z to
+detect the types that may be repeated. These are the types that consume a
+character. If any new escapes are put in between that don't consume a
+character, that code will have to change. */
+
+enum { ESC_A = 1, ESC_G, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s, ESC_W,
+       ESC_w, ESC_dum1, ESC_C, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_REF };
+
+/* Flag bits and data types for the extended class (OP_XCLASS) for classes that
+contain UTF-8 characters with values greater than 255. */
+
+#define XCL_NOT    0x01    /* Flag: this is a negative class */
+#define XCL_MAP    0x02    /* Flag: a 32-byte map is present */
+
+#define XCL_END       0    /* Marks end of individual items */
+#define XCL_SINGLE    1    /* Single item (one multibyte char) follows */
+#define XCL_RANGE     2    /* A range (two multibyte chars) follows */
+
+
+/* Opcode table: OP_BRA must be last, as all values >= it are used for brackets
+that extract substrings. Starting from 1 (i.e. after OP_END), the values up to
+OP_EOD must correspond in order to the list of escapes immediately above.
+Note that whenever this list is updated, the two macro definitions that follow
+must also be updated to match. */
+
+enum {
+  OP_END,            /* 0 End of pattern */
+
+  /* Values corresponding to backslashed metacharacters */
+
+  OP_SOD,            /* 1 Start of data: \A */
+  OP_SOM,            /* 2 Start of match (subject + offset): \G */
+  OP_NOT_WORD_BOUNDARY,  /*  3 \B */
+  OP_WORD_BOUNDARY,      /*  4 \b */
+  OP_NOT_DIGIT,          /*  5 \D */
+  OP_DIGIT,              /*  6 \d */
+  OP_NOT_WHITESPACE,     /*  7 \S */
+  OP_WHITESPACE,         /*  8 \s */
+  OP_NOT_WORDCHAR,       /*  9 \W */
+  OP_WORDCHAR,           /* 10 \w */
+  OP_ANY,            /* 11 Match any character */
+  OP_ANYBYTE,        /* 12 Match any byte (\C); different to OP_ANY for UTF-8 */
+  OP_EODN,           /* 13 End of data or \n at end of data: \Z. */
+  OP_EOD,            /* 14 End of data: \z */
+
+  OP_OPT,            /* 15 Set runtime options */
+  OP_CIRC,           /* 16 Start of line - varies with multiline switch */
+  OP_DOLL,           /* 17 End of line - varies with multiline switch */
+  OP_CHARS,          /* 18 Match string of characters */
+  OP_NOT,            /* 19 Match anything but the following char */
+
+  OP_STAR,           /* 20 The maximizing and minimizing versions of */
+  OP_MINSTAR,        /* 21 all these opcodes must come in pairs, with */
+  OP_PLUS,           /* 22 the minimizing one second. */
+  OP_MINPLUS,        /* 23 This first set applies to single characters */
+  OP_QUERY,          /* 24 */
+  OP_MINQUERY,       /* 25 */
+  OP_UPTO,           /* 26 From 0 to n matches */
+  OP_MINUPTO,        /* 27 */
+  OP_EXACT,          /* 28 Exactly n matches */
+
+  OP_NOTSTAR,        /* 29 The maximizing and minimizing versions of */
+  OP_NOTMINSTAR,     /* 30 all these opcodes must come in pairs, with */
+  OP_NOTPLUS,        /* 31 the minimizing one second. */
+  OP_NOTMINPLUS,     /* 32 This set applies to "not" single characters */
+  OP_NOTQUERY,       /* 33 */
+  OP_NOTMINQUERY,    /* 34 */
+  OP_NOTUPTO,        /* 35 From 0 to n matches */
+  OP_NOTMINUPTO,     /* 36 */
+  OP_NOTEXACT,       /* 37 Exactly n matches */
+
+  OP_TYPESTAR,       /* 38 The maximizing and minimizing versions of */
+  OP_TYPEMINSTAR,    /* 39 all these opcodes must come in pairs, with */
+  OP_TYPEPLUS,       /* 40 the minimizing one second. These codes must */
+  OP_TYPEMINPLUS,    /* 41 be in exactly the same order as those above. */
+  OP_TYPEQUERY,      /* 42 This set applies to character types such as \d */
+  OP_TYPEMINQUERY,   /* 43 */
+  OP_TYPEUPTO,       /* 44 From 0 to n matches */
+  OP_TYPEMINUPTO,    /* 45 */
+  OP_TYPEEXACT,      /* 46 Exactly n matches */
+
+  OP_CRSTAR,         /* 47 The maximizing and minimizing versions of */
+  OP_CRMINSTAR,      /* 48 all these opcodes must come in pairs, with */
+  OP_CRPLUS,         /* 49 the minimizing one second. These codes must */
+  OP_CRMINPLUS,      /* 50 be in exactly the same order as those above. */
+  OP_CRQUERY,        /* 51 These are for character classes and back refs */
+  OP_CRMINQUERY,     /* 52 */
+  OP_CRRANGE,        /* 53 These are different to the three seta above. */
+  OP_CRMINRANGE,     /* 54 */
+
+  OP_CLASS,          /* 55 Match a character class, chars < 256 only */
+  OP_NCLASS,         /* 56 Same, but the bitmap was created from a negative
+                           class - the difference is relevant only when a UTF-8
+                           character > 255 is encountered. */
+
+  OP_XCLASS,         /* 57 Extended class for handling UTF-8 chars within the
+                           class. This does both positive and negative. */
+
+  OP_REF,            /* 58 Match a back reference */
+  OP_RECURSE,        /* 59 Match a numbered subpattern (possibly recursive) */
+  OP_CALLOUT,        /* 60 Call out to external function if provided */
+
+  OP_ALT,            /* 61 Start of alternation */
+  OP_KET,            /* 62 End of group that doesn't have an unbounded repeat */
+  OP_KETRMAX,        /* 63 These two must remain together and in this */
+  OP_KETRMIN,        /* 64 order. They are for groups the repeat for ever. */
+
+  /* The assertions must come before ONCE and COND */
+
+  OP_ASSERT,         /* 65 Positive lookahead */
+  OP_ASSERT_NOT,     /* 66 Negative lookahead */
+  OP_ASSERTBACK,     /* 67 Positive lookbehind */
+  OP_ASSERTBACK_NOT, /* 68 Negative lookbehind */
+  OP_REVERSE,        /* 69 Move pointer back - used in lookbehind assertions */
+
+  /* ONCE and COND must come after the assertions, with ONCE first, as there's
+  a test for >= ONCE for a subpattern that isn't an assertion. */
+
+  OP_ONCE,           /* 70 Once matched, don't back up into the subpattern */
+  OP_COND,           /* 71 Conditional group */
+  OP_CREF,           /* 72 Used to hold an extraction string number (cond ref) */
+
+  OP_BRAZERO,        /* 73 These two must remain together and in this */
+  OP_BRAMINZERO,     /* 74 order. */
+
+  OP_BRANUMBER,      /* 75 Used for extracting brackets whose number is greater
+                           than can fit into an opcode. */
+
+  OP_BRA             /* 76 This and greater values are used for brackets that
+                           extract substrings up to a basic limit. After that,
+                           use is made of OP_BRANUMBER. */
+};
+
+/* WARNING: There is an implicit assumption in study.c that all opcodes are
+less than 128 in value. This makes handling UTF-8 character sequences easier.
+*/
+
+
+/* This macro defines textual names for all the opcodes. There are used only
+for debugging, in pcre.c when DEBUG is defined, and also in pcretest.c. The
+macro is referenced only in printint.c. */
+
+#define OP_NAME_LIST \
+  "End", "\\A", "\\G", "\\B", "\\b", "\\D", "\\d",                \
+  "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte", "\\Z", "\\z",     \
+  "Opt", "^", "$", "chars", "not",                                \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{",                      \
+  "class", "nclass", "xclass", "Ref", "Recurse", "Callout",       \
+  "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not",     \
+  "AssertB", "AssertB not", "Reverse", "Once", "Cond", "Cond ref",\
+  "Brazero", "Braminzero", "Branumber", "Bra"
+
+
+/* This macro defines the length of fixed length operations in the compiled
+regex. The lengths are used when searching for specific things, and also in the
+debugging printing of a compiled regex. We use a macro so that it can be
+incorporated both into pcre.c and pcretest.c without being publicly exposed.
+
+As things have been extended, some of these are no longer fixed lenths, but are
+minima instead. For example, the length of a single-character repeat may vary
+in UTF-8 mode. The code that uses this table must know about such things. */
+
+#define OP_LENGTHS \
+  1,                             /* End                                    */ \
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  /* \A, \G, \B, \B, \D, \d, \S, \s, \W, \w */ \
+  1, 1, 1, 1, 2, 1, 1,           /* Any, Anybyte, \Z, \z, Opt, ^, $        */ \
+  2,                             /* Chars - the minimum length             */ \
+  2,                             /* not                                    */ \
+  /* Positive single-char repeats                            ** These are  */ \
+  2, 2, 2, 2, 2, 2,              /* *, *?, +, +?, ?, ??      ** minima in  */ \
+  4, 4, 4,                       /* upto, minupto, exact     ** UTF-8 mode */ \
+  /* Negative single-char repeats - only for chars < 256                   */ \
+  2, 2, 2, 2, 2, 2,              /* NOT *, *?, +, +?, ?, ??                */ \
+  4, 4, 4,                       /* NOT upto, minupto, exact               */ \
+  /* Positive type repeats                                                 */ \
+  2, 2, 2, 2, 2, 2,              /* Type *, *?, +, +?, ?, ??               */ \
+  4, 4, 4,                       /* Type upto, minupto, exact              */ \
+  /* Character class & ref repeats                                         */ \
+  1, 1, 1, 1, 1, 1,              /* *, *?, +, +?, ?, ??                    */ \
+  5, 5,                          /* CRRANGE, CRMINRANGE                    */ \
+ 33,                             /* CLASS                                  */ \
+ 33,                             /* NCLASS                                 */ \
+  0,                             /* XCLASS - variable length               */ \
+  3,                             /* REF                                    */ \
+  1+LINK_SIZE,                   /* RECURSE                                */ \
+  2,                             /* CALLOUT                                */ \
+  1+LINK_SIZE,                   /* Alt                                    */ \
+  1+LINK_SIZE,                   /* Ket                                    */ \
+  1+LINK_SIZE,                   /* KetRmax                                */ \
+  1+LINK_SIZE,                   /* KetRmin                                */ \
+  1+LINK_SIZE,                   /* Assert                                 */ \
+  1+LINK_SIZE,                   /* Assert not                             */ \
+  1+LINK_SIZE,                   /* Assert behind                          */ \
+  1+LINK_SIZE,                   /* Assert behind not                      */ \
+  1+LINK_SIZE,                   /* Reverse                                */ \
+  1+LINK_SIZE,                   /* Once                                   */ \
+  1+LINK_SIZE,                   /* COND                                   */ \
+  3,                             /* CREF                                   */ \
+  1, 1,                          /* BRAZERO, BRAMINZERO                    */ \
+  3,                             /* BRANUMBER                              */ \
+  1+LINK_SIZE                    /* BRA                                    */ \
+
+
+/* The highest extraction number before we have to start using additional
+bytes. (Originally PCRE didn't have support for extraction counts highter than
+this number.) The value is limited by the number of opcodes left after OP_BRA,
+i.e. 255 - OP_BRA. We actually set it a bit lower to leave room for additional
+opcodes. */
+
+#define EXTRACT_BASIC_MAX  150
+
+/* A magic value for OP_CREF to indicate the "in recursion" condition. */
+
+#define CREF_RECURSE  0xffff
+
+/* The texts of compile-time error messages are defined as macros here so that
+they can be accessed by the POSIX wrapper and converted into error codes.  Yes,
+I could have used error codes in the first place, but didn't feel like changing
+just to accommodate the POSIX wrapper. */
+
+#define ERR1  "\\ at end of pattern"
+#define ERR2  "\\c at end of pattern"
+#define ERR3  "unrecognized character follows \\"
+#define ERR4  "numbers out of order in {} quantifier"
+#define ERR5  "number too big in {} quantifier"
+#define ERR6  "missing terminating ] for character class"
+#define ERR7  "invalid escape sequence in character class"
+#define ERR8  "range out of order in character class"
+#define ERR9  "nothing to repeat"
+#define ERR10 "operand of unlimited repeat could match the empty string"
+#define ERR11 "internal error: unexpected repeat"
+#define ERR12 "unrecognized character after (?"
+#define ERR13 "POSIX named classes are supported only within a class"
+#define ERR14 "missing )"
+#define ERR15 "reference to non-existent subpattern"
+#define ERR16 "erroffset passed as NULL"
+#define ERR17 "unknown option bit(s) set"
+#define ERR18 "missing ) after comment"
+#define ERR19 "parentheses nested too deeply"
+#define ERR20 "regular expression too large"
+#define ERR21 "failed to get memory"
+#define ERR22 "unmatched parentheses"
+#define ERR23 "internal error: code overflow"
+#define ERR24 "unrecognized character after (?<"
+#define ERR25 "lookbehind assertion is not fixed length"
+#define ERR26 "malformed number after (?("
+#define ERR27 "conditional group contains more than two branches"
+#define ERR28 "assertion expected after (?("
+#define ERR29 "(?R or (?digits must be followed by )"
+#define ERR30 "unknown POSIX class name"
+#define ERR31 "POSIX collating elements are not supported"
+#define ERR32 "this version of PCRE is not compiled with PCRE_UTF8 support"
+#define ERR33 "spare error"
+#define ERR34 "character value in \\x{...} sequence is too large"
+#define ERR35 "invalid condition (?(0)"
+#define ERR36 "\\C not allowed in lookbehind assertion"
+#define ERR37 "PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X"
+#define ERR38 "number after (?C is > 255"
+#define ERR39 "closing ) for (?C expected"
+#define ERR40 "recursive call could loop indefinitely"
+#define ERR41 "unrecognized character after (?P"
+#define ERR42 "syntax error after (?P"
+#define ERR43 "two named groups have the same name"
+#define ERR44 "invalid UTF-8 string"
+
+/* All character handling must be done as unsigned characters. Otherwise there
+are problems with top-bit-set characters and functions such as isspace().
+However, we leave the interface to the outside world as char *, because that
+should make things easier for callers. We define a short type for unsigned char
+to save lots of typing. I tried "uchar", but it causes problems on Digital
+Unix, where it is defined in sys/types, so use "uschar" instead. */
+
+typedef unsigned char uschar;
+
+/* The real format of the start of the pcre block; the index of names and the
+code vector run on as long as necessary after the end. */
+
+typedef struct real_pcre {
+  unsigned long int magic_number;
+  size_t size;                        /* Total that was malloced */
+  const unsigned char *tables;        /* Pointer to tables */
+  unsigned long int options;
+  unsigned short int top_bracket;
+  unsigned short int top_backref;
+  unsigned short int first_byte;
+  unsigned short int req_byte;
+  unsigned short int name_entry_size; /* Size of any name items; 0 => none */
+  unsigned short int name_count;      /* Number of name items */
+} real_pcre;
+
+/* The format of the block used to store data from pcre_study(). */
+
+typedef struct pcre_study_data {
+  size_t size;                        /* Total that was malloced */
+  uschar options;
+  uschar start_bits[32];
+} pcre_study_data;
+
+/* Structure for passing "static" information around between the functions
+doing the compiling, so that they are thread-safe. */
+
+typedef struct compile_data {
+  const uschar *lcc;            /* Points to lower casing table */
+  const uschar *fcc;            /* Points to case-flipping table */
+  const uschar *cbits;          /* Points to character type table */
+  const uschar *ctypes;         /* Points to table of type maps */
+  const uschar *start_code;     /* The start of the compiled code */
+  uschar *name_table;           /* The name/number table */
+  int  names_found;             /* Number of entries so far */
+  int  name_entry_size;         /* Size of each entry */
+  int  top_backref;             /* Maximum back reference */
+  unsigned int backref_map;     /* Bitmap of low back refs */
+  int  req_varyopt;             /* "After variable item" flag for reqbyte */
+} compile_data;
+
+/* Structure for maintaining a chain of pointers to the currently incomplete
+branches, for testing for left recursion. */
+
+typedef struct branch_chain {
+  struct branch_chain *outer;
+  uschar *current;
+} branch_chain;
+
+/* Structure for items in a linked list that represents an explicit recursive
+call within the pattern. */
+
+typedef struct recursion_info {
+  struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
+  int group_num;                /* Number of group that was called */
+  const uschar *after_call;     /* "Return value": points after the call in the expr */
+  const uschar *save_start;     /* Old value of md->start_match */
+  int *offset_save;             /* Pointer to start of saved offsets */
+  int saved_max;                /* Number of saved offsets */
+} recursion_info;
+
+/* When compiling in a mode that doesn't use recursive calls to match(),
+a structure is used to remember local variables on the heap. It is defined in
+pcre.c, close to the match() function, so that it is easy to keep it in step
+with any changes of local variable. However, the pointer to the current frame
+must be saved in some "static" place over a longjmp(). We declare the
+structure here so that we can put a pointer in the match_data structure.
+NOTE: This isn't used for a "normal" compilation of pcre. */
+
+struct heapframe;
+
+/* Structure for passing "static" information around between the functions
+doing the matching, so that they are thread-safe. */
+
+typedef struct match_data {
+  unsigned long int match_call_count; /* As it says */
+  unsigned long int match_limit;/* As it says */
+  int   *offset_vector;         /* Offset vector */
+  int    offset_end;            /* One past the end */
+  int    offset_max;            /* The maximum usable for return data */
+  const uschar *lcc;            /* Points to lower casing table */
+  const uschar *ctypes;         /* Points to table of type maps */
+  BOOL   offset_overflow;       /* Set if too many extractions */
+  BOOL   notbol;                /* NOTBOL flag */
+  BOOL   noteol;                /* NOTEOL flag */
+  BOOL   utf8;                  /* UTF8 flag */
+  BOOL   endonly;               /* Dollar not before final \n */
+  BOOL   notempty;              /* Empty string match not wanted */
+  const uschar *start_code;     /* For use when recursing */
+  const uschar *start_subject;  /* Start of the subject string */
+  const uschar *end_subject;    /* End of the subject string */
+  const uschar *start_match;    /* Start of this match attempt */
+  const uschar *end_match_ptr;  /* Subject position at end match */
+  int    end_offset_top;        /* Highwater mark at end of match */
+  int    capture_last;          /* Most recent capture number */
+  int    start_offset;          /* The start offset value */
+  recursion_info *recursive;    /* Linked list of recursion data */
+  void  *callout_data;          /* To pass back to callouts */
+  struct heapframe *thisframe;  /* Used only when compiling for no recursion */
+} match_data;
+
+/* Bit definitions for entries in the pcre_ctypes table. */
+
+#define ctype_space   0x01
+#define ctype_letter  0x02
+#define ctype_digit   0x04
+#define ctype_xdigit  0x08
+#define ctype_word    0x10   /* alphameric or '_' */
+#define ctype_meta    0x80   /* regexp meta char or zero (end pattern) */
+
+/* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
+of bits for a class map. Some classes are built by combining these tables. */
+
+#define cbit_space     0      /* [:space:] or \s */
+#define cbit_xdigit   32      /* [:xdigit:] */
+#define cbit_digit    64      /* [:digit:] or \d */
+#define cbit_upper    96      /* [:upper:] */
+#define cbit_lower   128      /* [:lower:] */
+#define cbit_word    160      /* [:word:] or \w */
+#define cbit_graph   192      /* [:graph:] */
+#define cbit_print   224      /* [:print:] */
+#define cbit_punct   256      /* [:punct:] */
+#define cbit_cntrl   288      /* [:cntrl:] */
+#define cbit_length  320      /* Length of the cbits table */
+
+/* Offsets of the various tables from the base tables pointer, and
+total length. */
+
+#define lcc_offset      0
+#define fcc_offset    256
+#define cbits_offset  512
+#define ctypes_offset (cbits_offset + cbit_length)
+#define tables_length (ctypes_offset + 256)
+
+/* End of internal.h */
diff --git a/external-libs/pcre/libpcre.def b/external-libs/pcre/libpcre.def
new file mode 100644
index 00000000..2b35d10b
--- /dev/null
+++ b/external-libs/pcre/libpcre.def
@@ -0,0 +1,19 @@
+LIBRARY libpcre
+EXPORTS
+pcre_malloc
+pcre_free
+pcre_config
+pcre_callout
+pcre_compile
+pcre_copy_substring
+pcre_exec
+pcre_get_substring
+pcre_get_stringnumber
+pcre_get_substring_list
+pcre_free_substring
+pcre_free_substring_list
+pcre_info
+pcre_fullinfo
+pcre_maketables
+pcre_study
+pcre_version
diff --git a/external-libs/pcre/libpcreposix.def b/external-libs/pcre/libpcreposix.def
new file mode 100644
index 00000000..57234400
--- /dev/null
+++ b/external-libs/pcre/libpcreposix.def
@@ -0,0 +1,24 @@
+LIBRARY libpcreposix
+EXPORTS
+pcre_malloc
+pcre_free
+pcre_config
+pcre_callout
+pcre_compile
+pcre_copy_substring
+pcre_exec
+pcre_get_substring
+pcre_get_stringnumber
+pcre_get_substring_list
+pcre_free_substring
+pcre_free_substring_list
+pcre_info
+pcre_fullinfo
+pcre_maketables
+pcre_study
+pcre_version
+
+regcomp
+regexec
+regerror
+regfree
diff --git a/external-libs/pcre/ltmain.sh b/external-libs/pcre/ltmain.sh
new file mode 100644
index 00000000..de848c62
--- /dev/null
+++ b/external-libs/pcre/ltmain.sh
@@ -0,0 +1,5069 @@
+# ltmain.sh - Provide generalized library-building support services.
+# NOTE: Changing this file will not affect anything until you rerun configure.
+#
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
+# Free Software Foundation, Inc.
+# Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Check that we have a working $echo.
+if test "X$1" = X--no-reexec; then
+  # Discard the --no-reexec flag, and continue.
+  shift
+elif test "X$1" = X--fallback-echo; then
+  # Avoid inline document here, it may be left over
+  :
+elif test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then
+  # Yippee, $echo works!
+  :
+else
+  # Restart under the correct shell, and then maybe $echo will work.
+  exec $SHELL "$0" --no-reexec ${1+"$@"}
+fi
+
+if test "X$1" = X--fallback-echo; then
+  # used as fallback echo
+  shift
+  cat <<EOF
+$*
+EOF
+  exit 0
+fi
+
+# Modification by PH (18-Feb-2003) to ensure that ${SED} is always set
+# (it is not set on my system).
+
+case "X${SED}" in
+  X) SED=sed ;;
+esac   
+
+# The name of this program.
+progname=`$echo "$0" | ${SED} 's%^.*/%%'`
+modename="$progname"
+
+# Constants.
+PROGRAM=ltmain.sh
+PACKAGE=libtool
+VERSION=1.4.3
+TIMESTAMP=" (1.922.2.110 2002/10/23 01:39:54)"
+
+default_mode=
+help="Try \`$progname --help' for more information."
+magic="%%%MAGIC variable%%%"
+mkdir="mkdir"
+mv="mv -f"
+rm="rm -f"
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+Xsed="${SED}"' -e 1s/^X//'
+sed_quote_subst='s/\([\\`\\"$\\\\]\)/\\\1/g'
+# test EBCDIC or ASCII                                                         
+case `echo A|od -x` in                                                         
+ *[Cc]1*) # EBCDIC based system                                                
+  SP2NL="tr '\100' '\n'"                                                       
+  NL2SP="tr '\r\n' '\100\100'"                                                 
+  ;;                                                                           
+ *) # Assume ASCII based system                                                
+  SP2NL="tr '\040' '\012'"                                                     
+  NL2SP="tr '\015\012' '\040\040'"                                             
+  ;;                                                                           
+esac                                                                           
+
+# NLS nuisances.
+# Only set LANG and LC_ALL to C if already set.
+# These must not be set unconditionally because not all systems understand
+# e.g. LANG=C (notably SCO).
+# We save the old values to restore during execute mode.
+if test "${LC_ALL+set}" = set; then
+  save_LC_ALL="$LC_ALL"; LC_ALL=C; export LC_ALL
+fi
+if test "${LANG+set}" = set; then
+  save_LANG="$LANG"; LANG=C; export LANG
+fi
+
+# Make sure IFS has a sensible default
+: ${IFS="	"}
+
+if test "$build_libtool_libs" != yes && test "$build_old_libs" != yes; then
+  echo "$modename: not configured to build any kind of library" 1>&2
+  echo "Fatal configuration error.  See the $PACKAGE docs for more information." 1>&2
+  exit 1
+fi
+
+# Global variables.
+mode=$default_mode
+nonopt=
+prev=
+prevopt=
+run=
+show="$echo"
+show_help=
+execute_dlfiles=
+lo2o="s/\\.lo\$/.${objext}/"
+o2lo="s/\\.${objext}\$/.lo/"
+
+# Parse our command line options once, thoroughly.
+while test $# -gt 0
+do
+  arg="$1"
+  shift
+
+  case $arg in
+  -*=*) optarg=`$echo "X$arg" | $Xsed -e 's/[-_a-zA-Z0-9]*=//'` ;;
+  *) optarg= ;;
+  esac
+
+  # If the previous option needs an argument, assign it.
+  if test -n "$prev"; then
+    case $prev in
+    execute_dlfiles)
+      execute_dlfiles="$execute_dlfiles $arg"
+      ;;
+    *)
+      eval "$prev=\$arg"
+      ;;
+    esac
+
+    prev=
+    prevopt=
+    continue
+  fi
+
+  # Have we seen a non-optional argument yet?
+  case $arg in
+  --help)
+    show_help=yes
+    ;;
+
+  --version)
+    echo "$PROGRAM (GNU $PACKAGE) $VERSION$TIMESTAMP"
+    exit 0
+    ;;
+
+  --config)
+    ${SED} -e '1,/^# ### BEGIN LIBTOOL CONFIG/d' -e '/^# ### END LIBTOOL CONFIG/,$d' $0
+    exit 0
+    ;;
+
+  --debug)
+    echo "$progname: enabling shell trace mode"
+    set -x
+    ;;
+
+  --dry-run | -n)
+    run=:
+    ;;
+
+  --features)
+    echo "host: $host"
+    if test "$build_libtool_libs" = yes; then
+      echo "enable shared libraries"
+    else
+      echo "disable shared libraries"
+    fi
+    if test "$build_old_libs" = yes; then
+      echo "enable static libraries"
+    else
+      echo "disable static libraries"
+    fi
+    exit 0
+    ;;
+
+  --finish) mode="finish" ;;
+
+  --mode) prevopt="--mode" prev=mode ;;
+  --mode=*) mode="$optarg" ;;
+
+  --preserve-dup-deps) duplicate_deps="yes" ;;
+
+  --quiet | --silent)
+    show=:
+    ;;
+
+  -dlopen)
+    prevopt="-dlopen"
+    prev=execute_dlfiles
+    ;;
+
+  -*)
+    $echo "$modename: unrecognized option \`$arg'" 1>&2
+    $echo "$help" 1>&2
+    exit 1
+    ;;
+
+  *)
+    nonopt="$arg"
+    break
+    ;;
+  esac
+done
+
+if test -n "$prevopt"; then
+  $echo "$modename: option \`$prevopt' requires an argument" 1>&2
+  $echo "$help" 1>&2
+  exit 1
+fi
+
+# If this variable is set in any of the actions, the command in it
+# will be execed at the end.  This prevents here-documents from being
+# left over by shells.
+exec_cmd=
+
+if test -z "$show_help"; then
+
+  # Infer the operation mode.
+  if test -z "$mode"; then
+    case $nonopt in
+    *cc | *++ | gcc* | *-gcc* | xlc*)
+      mode=link
+      for arg
+      do
+	case $arg in
+	-c)
+	   mode=compile
+	   break
+	   ;;
+	esac
+      done
+      ;;
+    *db | *dbx | *strace | *truss)
+      mode=execute
+      ;;
+    *install*|cp|mv)
+      mode=install
+      ;;
+    *rm)
+      mode=uninstall
+      ;;
+    *)
+      # If we have no mode, but dlfiles were specified, then do execute mode.
+      test -n "$execute_dlfiles" && mode=execute
+
+      # Just use the default operation mode.
+      if test -z "$mode"; then
+	if test -n "$nonopt"; then
+	  $echo "$modename: warning: cannot infer operation mode from \`$nonopt'" 1>&2
+	else
+	  $echo "$modename: warning: cannot infer operation mode without MODE-ARGS" 1>&2
+	fi
+      fi
+      ;;
+    esac
+  fi
+
+  # Only execute mode is allowed to have -dlopen flags.
+  if test -n "$execute_dlfiles" && test "$mode" != execute; then
+    $echo "$modename: unrecognized option \`-dlopen'" 1>&2
+    $echo "$help" 1>&2
+    exit 1
+  fi
+
+  # Change the help message to a mode-specific one.
+  generic_help="$help"
+  help="Try \`$modename --help --mode=$mode' for more information."
+
+  # These modes are in order of execution frequency so that they run quickly.
+  case $mode in
+  # libtool compile mode
+  compile)
+    modename="$modename: compile"
+    # Get the compilation command and the source file.
+    base_compile=
+    prev=
+    lastarg=
+    srcfile="$nonopt"
+    suppress_output=
+
+    user_target=no
+    for arg
+    do
+      case $prev in
+      "") ;;
+      xcompiler)
+	# Aesthetically quote the previous argument.
+	prev=
+	lastarg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
+
+	case $arg in
+	# Double-quote args containing other shell metacharacters.
+	# Many Bourne shells cannot handle close brackets correctly
+	# in scan sets, so we specify it separately.
+	*[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	  arg="\"$arg\""
+	  ;;
+	esac
+
+	# Add the previous argument to base_compile.
+	if test -z "$base_compile"; then
+	  base_compile="$lastarg"
+	else
+	  base_compile="$base_compile $lastarg"
+	fi
+	continue
+	;;
+      esac
+
+      # Accept any command-line options.
+      case $arg in
+      -o)
+	if test "$user_target" != "no"; then
+	  $echo "$modename: you cannot specify \`-o' more than once" 1>&2
+	  exit 1
+	fi
+	user_target=next
+	;;
+
+      -static)
+	build_old_libs=yes
+	continue
+	;;
+
+      -prefer-pic)
+	pic_mode=yes
+	continue
+	;;
+
+      -prefer-non-pic)
+	pic_mode=no
+	continue
+	;;
+
+      -Xcompiler)
+	prev=xcompiler
+	continue
+	;;
+
+      -Wc,*)
+	args=`$echo "X$arg" | $Xsed -e "s/^-Wc,//"`
+	lastarg=
+	save_ifs="$IFS"; IFS=','
+	for arg in $args; do
+	  IFS="$save_ifs"
+
+	  # Double-quote args containing other shell metacharacters.
+	  # Many Bourne shells cannot handle close brackets correctly
+	  # in scan sets, so we specify it separately.
+	  case $arg in
+	    *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	    arg="\"$arg\""
+	    ;;
+	  esac
+	  lastarg="$lastarg $arg"
+	done
+	IFS="$save_ifs"
+	lastarg=`$echo "X$lastarg" | $Xsed -e "s/^ //"`
+
+	# Add the arguments to base_compile.
+	if test -z "$base_compile"; then
+	  base_compile="$lastarg"
+	else
+	  base_compile="$base_compile $lastarg"
+	fi
+	continue
+	;;
+      esac
+
+      case $user_target in
+      next)
+	# The next one is the -o target name
+	user_target=yes
+	continue
+	;;
+      yes)
+	# We got the output file
+	user_target=set
+	libobj="$arg"
+	continue
+	;;
+      esac
+
+      # Accept the current argument as the source file.
+      lastarg="$srcfile"
+      srcfile="$arg"
+
+      # Aesthetically quote the previous argument.
+
+      # Backslashify any backslashes, double quotes, and dollar signs.
+      # These are the only characters that are still specially
+      # interpreted inside of double-quoted scrings.
+      lastarg=`$echo "X$lastarg" | $Xsed -e "$sed_quote_subst"`
+
+      # Double-quote args containing other shell metacharacters.
+      # Many Bourne shells cannot handle close brackets correctly
+      # in scan sets, so we specify it separately.
+      case $lastarg in
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	lastarg="\"$lastarg\""
+	;;
+      esac
+
+      # Add the previous argument to base_compile.
+      if test -z "$base_compile"; then
+	base_compile="$lastarg"
+      else
+	base_compile="$base_compile $lastarg"
+      fi
+    done
+
+    case $user_target in
+    set)
+      ;;
+    no)
+      # Get the name of the library object.
+      libobj=`$echo "X$srcfile" | $Xsed -e 's%^.*/%%'`
+      ;;
+    *)
+      $echo "$modename: you must specify a target with \`-o'" 1>&2
+      exit 1
+      ;;
+    esac
+
+    # Recognize several different file suffixes.
+    # If the user specifies -o file.o, it is replaced with file.lo
+    xform='[cCFSfmso]'
+    case $libobj in
+    *.ada) xform=ada ;;
+    *.adb) xform=adb ;;
+    *.ads) xform=ads ;;
+    *.asm) xform=asm ;;
+    *.c++) xform=c++ ;;
+    *.cc) xform=cc ;;
+    *.cpp) xform=cpp ;;
+    *.cxx) xform=cxx ;;
+    *.f90) xform=f90 ;;
+    *.for) xform=for ;;
+    esac
+
+    libobj=`$echo "X$libobj" | $Xsed -e "s/\.$xform$/.lo/"`
+
+    case $libobj in
+    *.lo) obj=`$echo "X$libobj" | $Xsed -e "$lo2o"` ;;
+    *)
+      $echo "$modename: cannot determine name of library object from \`$libobj'" 1>&2
+      exit 1
+      ;;
+    esac
+
+    if test -z "$base_compile"; then
+      $echo "$modename: you must specify a compilation command" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    # Delete any leftover library objects.
+    if test "$build_old_libs" = yes; then
+      removelist="$obj $libobj"
+    else
+      removelist="$libobj"
+    fi
+
+    $run $rm $removelist
+    trap "$run $rm $removelist; exit 1" 1 2 15
+
+    # On Cygwin there's no "real" PIC flag so we must build both object types
+    case $host_os in
+    cygwin* | mingw* | pw32* | os2*)
+      pic_mode=default
+      ;;
+    esac
+    if test "$pic_mode" = no && test "$deplibs_check_method" != pass_all; then
+      # non-PIC code in shared libraries is not supported
+      pic_mode=default
+    fi
+
+    # Calculate the filename of the output object if compiler does
+    # not support -o with -c
+    if test "$compiler_c_o" = no; then
+      output_obj=`$echo "X$srcfile" | $Xsed -e 's%^.*/%%' -e 's%\.[^.]*$%%'`.${objext}
+      lockfile="$output_obj.lock"
+      removelist="$removelist $output_obj $lockfile"
+      trap "$run $rm $removelist; exit 1" 1 2 15
+    else
+      need_locks=no
+      lockfile=
+    fi
+
+    # Lock this critical section if it is needed
+    # We use this script file to make the link, it avoids creating a new file
+    if test "$need_locks" = yes; then
+      until $run ln "$0" "$lockfile" 2>/dev/null; do
+	$show "Waiting for $lockfile to be removed"
+	sleep 2
+      done
+    elif test "$need_locks" = warn; then
+      if test -f "$lockfile"; then
+	echo "\
+*** ERROR, $lockfile exists and contains:
+`cat $lockfile 2>/dev/null`
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$run $rm $removelist
+	exit 1
+      fi
+      echo $srcfile > "$lockfile"
+    fi
+
+    if test -n "$fix_srcfile_path"; then
+      eval srcfile=\"$fix_srcfile_path\"
+    fi
+
+    # Only build a PIC object if we are building libtool libraries.
+    if test "$build_libtool_libs" = yes; then
+      # Without this assignment, base_compile gets emptied.
+      fbsd_hideous_sh_bug=$base_compile
+
+      if test "$pic_mode" != no; then
+	# All platforms use -DPIC, to notify preprocessed assembler code.
+	command="$base_compile $srcfile $pic_flag -DPIC"
+      else
+	# Don't build PIC code
+	command="$base_compile $srcfile"
+      fi
+      if test "$build_old_libs" = yes; then
+	lo_libobj="$libobj"
+	dir=`$echo "X$libobj" | $Xsed -e 's%/[^/]*$%%'`
+	if test "X$dir" = "X$libobj"; then
+	  dir="$objdir"
+	else
+	  dir="$dir/$objdir"
+	fi
+	libobj="$dir/"`$echo "X$libobj" | $Xsed -e 's%^.*/%%'`
+
+	if test -d "$dir"; then
+	  $show "$rm $libobj"
+	  $run $rm $libobj
+	else
+	  $show "$mkdir $dir"
+	  $run $mkdir $dir
+	  status=$?
+	  if test $status -ne 0 && test ! -d $dir; then
+	    exit $status
+	  fi
+	fi
+      fi
+      if test "$compiler_o_lo" = yes; then
+	output_obj="$libobj"
+	command="$command -o $output_obj"
+      elif test "$compiler_c_o" = yes; then
+	output_obj="$obj"
+	command="$command -o $output_obj"
+      fi
+
+      $run $rm "$output_obj"
+      $show "$command"
+      if $run eval "$command"; then :
+      else
+	test -n "$output_obj" && $run $rm $removelist
+	exit 1
+      fi
+
+      if test "$need_locks" = warn &&
+	 test x"`cat $lockfile 2>/dev/null`" != x"$srcfile"; then
+	echo "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$run $rm $removelist
+	exit 1
+      fi
+
+      # Just move the object if needed, then go on to compile the next one
+      if test x"$output_obj" != x"$libobj"; then
+	$show "$mv $output_obj $libobj"
+	if $run $mv $output_obj $libobj; then :
+	else
+	  error=$?
+	  $run $rm $removelist
+	  exit $error
+	fi
+      fi
+
+      # If we have no pic_flag, then copy the object into place and finish.
+      if (test -z "$pic_flag" || test "$pic_mode" != default) &&
+	 test "$build_old_libs" = yes; then
+	# Rename the .lo from within objdir to obj
+	if test -f $obj; then
+	  $show $rm $obj
+	  $run $rm $obj
+	fi
+
+	$show "$mv $libobj $obj"
+	if $run $mv $libobj $obj; then :
+	else
+	  error=$?
+	  $run $rm $removelist
+	  exit $error
+	fi
+
+	xdir=`$echo "X$obj" | $Xsed -e 's%/[^/]*$%%'`
+	if test "X$xdir" = "X$obj"; then
+	  xdir="."
+	else
+	  xdir="$xdir"
+	fi
+	baseobj=`$echo "X$obj" | $Xsed -e "s%.*/%%"`
+	libobj=`$echo "X$baseobj" | $Xsed -e "$o2lo"`
+	# Now arrange that obj and lo_libobj become the same file
+	$show "(cd $xdir && $LN_S $baseobj $libobj)"
+	if $run eval '(cd $xdir && $LN_S $baseobj $libobj)'; then
+	  # Unlock the critical section if it was locked
+	  if test "$need_locks" != no; then
+	    $run $rm "$lockfile"
+	  fi
+	  exit 0
+	else
+	  error=$?
+	  $run $rm $removelist
+	  exit $error
+	fi
+      fi
+
+      # Allow error messages only from the first compilation.
+      suppress_output=' >/dev/null 2>&1'
+    fi
+
+    # Only build a position-dependent object if we build old libraries.
+    if test "$build_old_libs" = yes; then
+      if test "$pic_mode" != yes; then
+	# Don't build PIC code
+	command="$base_compile $srcfile"
+      else
+	# All platforms use -DPIC, to notify preprocessed assembler code.
+	command="$base_compile $srcfile $pic_flag -DPIC"
+      fi
+      if test "$compiler_c_o" = yes; then
+	command="$command -o $obj"
+	output_obj="$obj"
+      fi
+
+      # Suppress compiler output if we already did a PIC compilation.
+      command="$command$suppress_output"
+      $run $rm "$output_obj"
+      $show "$command"
+      if $run eval "$command"; then :
+      else
+	$run $rm $removelist
+	exit 1
+      fi
+
+      if test "$need_locks" = warn &&
+	 test x"`cat $lockfile 2>/dev/null`" != x"$srcfile"; then
+	echo "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$run $rm $removelist
+	exit 1
+      fi
+
+      # Just move the object if needed
+      if test x"$output_obj" != x"$obj"; then
+	$show "$mv $output_obj $obj"
+	if $run $mv $output_obj $obj; then :
+	else
+	  error=$?
+	  $run $rm $removelist
+	  exit $error
+	fi
+      fi
+
+      # Create an invalid libtool object if no PIC, so that we do not
+      # accidentally link it into a program.
+      if test "$build_libtool_libs" != yes; then
+	$show "echo timestamp > $libobj"
+	$run eval "echo timestamp > \$libobj" || exit $?
+      else
+	# Move the .lo from within objdir
+	$show "$mv $libobj $lo_libobj"
+	if $run $mv $libobj $lo_libobj; then :
+	else
+	  error=$?
+	  $run $rm $removelist
+	  exit $error
+	fi
+      fi
+    fi
+
+    # Unlock the critical section if it was locked
+    if test "$need_locks" != no; then
+      $run $rm "$lockfile"
+    fi
+
+    exit 0
+    ;;
+
+  # libtool link mode
+  link | relink)
+    modename="$modename: link"
+    case $host in
+    *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*)
+      # It is impossible to link a dll without this setting, and
+      # we shouldn't force the makefile maintainer to figure out
+      # which system we are compiling for in order to pass an extra
+      # flag for every libtool invokation.
+      # allow_undefined=no
+
+      # FIXME: Unfortunately, there are problems with the above when trying
+      # to make a dll which has undefined symbols, in which case not
+      # even a static library is built.  For now, we need to specify
+      # -no-undefined on the libtool link line when we can be certain
+      # that all symbols are satisfied, otherwise we get a static library.
+      allow_undefined=yes
+      ;;
+    *)
+      allow_undefined=yes
+      ;;
+    esac
+    libtool_args="$nonopt"
+    compile_command="$nonopt"
+    finalize_command="$nonopt"
+
+    compile_rpath=
+    finalize_rpath=
+    compile_shlibpath=
+    finalize_shlibpath=
+    convenience=
+    old_convenience=
+    deplibs=
+    old_deplibs=
+    compiler_flags=
+    linker_flags=
+    dllsearchpath=
+    lib_search_path=`pwd`
+
+    avoid_version=no
+    dlfiles=
+    dlprefiles=
+    dlself=no
+    export_dynamic=no
+    export_symbols=
+    export_symbols_regex=
+    generated=
+    libobjs=
+    ltlibs=
+    module=no
+    no_install=no
+    objs=
+    prefer_static_libs=no
+    preload=no
+    prev=
+    prevarg=
+    release=
+    rpath=
+    xrpath=
+    perm_rpath=
+    temp_rpath=
+    thread_safe=no
+    vinfo=
+
+    # We need to know -static, to get the right output filenames.
+    for arg
+    do
+      case $arg in
+      -all-static | -static)
+	if test "X$arg" = "X-all-static"; then
+	  if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then
+	    $echo "$modename: warning: complete static linking is impossible in this configuration" 1>&2
+	  fi
+	  if test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	else
+	  if test -z "$pic_flag" && test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	fi
+	build_libtool_libs=no
+	build_old_libs=yes
+	prefer_static_libs=yes
+	break
+	;;
+      esac
+    done
+
+    # See if our shared archives depend on static archives.
+    test -n "$old_archive_from_new_cmds" && build_old_libs=yes
+
+    # Go through the arguments, transforming them on the way.
+    while test $# -gt 0; do
+      arg="$1"
+      shift
+      case $arg in
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	qarg=\"`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`\" ### testsuite: skip nested quoting test
+	;;
+      *) qarg=$arg ;;
+      esac
+      libtool_args="$libtool_args $qarg"
+
+      # If the previous option needs an argument, assign it.
+      if test -n "$prev"; then
+	case $prev in
+	output)
+	  compile_command="$compile_command @OUTPUT@"
+	  finalize_command="$finalize_command @OUTPUT@"
+	  ;;
+	esac
+
+	case $prev in
+	dlfiles|dlprefiles)
+	  if test "$preload" = no; then
+	    # Add the symbol object into the linking commands.
+	    compile_command="$compile_command @SYMFILE@"
+	    finalize_command="$finalize_command @SYMFILE@"
+	    preload=yes
+	  fi
+	  case $arg in
+	  *.la | *.lo) ;;  # We handle these cases below.
+	  force)
+	    if test "$dlself" = no; then
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  self)
+	    if test "$prev" = dlprefiles; then
+	      dlself=yes
+	    elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then
+	      dlself=yes
+	    else
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  *)
+	    if test "$prev" = dlfiles; then
+	      dlfiles="$dlfiles $arg"
+	    else
+	      dlprefiles="$dlprefiles $arg"
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  esac
+	  ;;
+	expsyms)
+	  export_symbols="$arg"
+	  if test ! -f "$arg"; then
+	    $echo "$modename: symbol file \`$arg' does not exist"
+	    exit 1
+	  fi
+	  prev=
+	  continue
+	  ;;
+	expsyms_regex)
+	  export_symbols_regex="$arg"
+	  prev=
+	  continue
+	  ;;
+	release)
+	  release="-$arg"
+	  prev=
+	  continue
+	  ;;
+	rpath | xrpath)
+	  # We need an absolute path.
+	  case $arg in
+	  [\\/]* | [A-Za-z]:[\\/]*) ;;
+	  *)
+	    $echo "$modename: only absolute run-paths are allowed" 1>&2
+	    exit 1
+	    ;;
+	  esac
+	  if test "$prev" = rpath; then
+	    case "$rpath " in
+	    *" $arg "*) ;;
+	    *) rpath="$rpath $arg" ;;
+	    esac
+	  else
+	    case "$xrpath " in
+	    *" $arg "*) ;;
+	    *) xrpath="$xrpath $arg" ;;
+	    esac
+	  fi
+	  prev=
+	  continue
+	  ;;
+	xcompiler)
+	  compiler_flags="$compiler_flags $qarg"
+	  prev=
+	  compile_command="$compile_command $qarg"
+	  finalize_command="$finalize_command $qarg"
+	  continue
+	  ;;
+	xlinker)
+	  linker_flags="$linker_flags $qarg"
+	  compiler_flags="$compiler_flags $wl$qarg"
+	  prev=
+	  compile_command="$compile_command $wl$qarg"
+	  finalize_command="$finalize_command $wl$qarg"
+	  continue
+	  ;;
+	*)
+	  eval "$prev=\"\$arg\""
+	  prev=
+	  continue
+	  ;;
+	esac
+      fi # test -n $prev
+
+      prevarg="$arg"
+
+      case $arg in
+      -all-static)
+	if test -n "$link_static_flag"; then
+	  compile_command="$compile_command $link_static_flag"
+	  finalize_command="$finalize_command $link_static_flag"
+	fi
+	continue
+	;;
+
+      -allow-undefined)
+	# FIXME: remove this flag sometime in the future.
+	$echo "$modename: \`-allow-undefined' is deprecated because it is the default" 1>&2
+	continue
+	;;
+
+      -avoid-version)
+	avoid_version=yes
+	continue
+	;;
+
+      -dlopen)
+	prev=dlfiles
+	continue
+	;;
+
+      -dlpreopen)
+	prev=dlprefiles
+	continue
+	;;
+
+      -export-dynamic)
+	export_dynamic=yes
+	continue
+	;;
+
+      -export-symbols | -export-symbols-regex)
+	if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
+	  $echo "$modename: more than one -exported-symbols argument is not allowed"
+	  exit 1
+	fi
+	if test "X$arg" = "X-export-symbols"; then
+	  prev=expsyms
+	else
+	  prev=expsyms_regex
+	fi
+	continue
+	;;
+
+      # The native IRIX linker understands -LANG:*, -LIST:* and -LNO:*
+      # so, if we see these flags be careful not to treat them like -L
+      -L[A-Z][A-Z]*:*)
+	case $with_gcc/$host in
+	no/*-*-irix* | no/*-*-nonstopux*)
+	  compile_command="$compile_command $arg"
+	  finalize_command="$finalize_command $arg"
+	  ;;
+	esac
+	continue
+	;;
+
+      -L*)
+	dir=`$echo "X$arg" | $Xsed -e 's/^-L//'`
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	*)
+	  absdir=`cd "$dir" && pwd`
+	  if test -z "$absdir"; then
+	    $echo "$modename: cannot determine absolute directory name of \`$dir'" 1>&2
+	    exit 1
+	  fi
+	  dir="$absdir"
+	  ;;
+	esac
+	case "$deplibs " in
+	*" -L$dir "*) ;;
+	*)
+	  deplibs="$deplibs -L$dir"
+	  lib_search_path="$lib_search_path $dir"
+	  ;;
+	esac
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*)
+	  case :$dllsearchpath: in
+	  *":$dir:"*) ;;
+	  *) dllsearchpath="$dllsearchpath:$dir";;
+	  esac
+	  ;;
+	esac
+	continue
+	;;
+
+      -l*)
+	if test "X$arg" = "X-lc" || test "X$arg" = "X-lm"; then
+	  case $host in
+	  *-*-cygwin* | *-*-pw32* | *-*-beos*)
+	    # These systems don't actually have a C or math library (as such)
+	    continue
+	    ;;
+	  *-*-mingw* | *-*-os2*)
+	    # These systems don't actually have a C library (as such)
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  *-*-openbsd* | *-*-freebsd*)
+	    # Do not include libc due to us having libc/libc_r.
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  esac
+	 elif test "X$arg" = "X-lc_r"; then
+	  case $host in
+	 *-*-openbsd* | *-*-freebsd*)
+	    # Do not include libc_r directly, use -pthread flag.
+	    continue
+	    ;;
+	  esac
+	fi
+	deplibs="$deplibs $arg"
+	continue
+	;;
+
+      -module)
+	module=yes
+	continue
+	;;
+
+      -no-fast-install)
+	fast_install=no
+	continue
+	;;
+
+      -no-install)
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*)
+	  # The PATH hackery in wrapper scripts is required on Windows
+	  # in order for the loader to find any dlls it needs.
+	  $echo "$modename: warning: \`-no-install' is ignored for $host" 1>&2
+	  $echo "$modename: warning: assuming \`-no-fast-install' instead" 1>&2
+	  fast_install=no
+	  ;;
+	*) no_install=yes ;;
+	esac
+	continue
+	;;
+
+      -no-undefined)
+	allow_undefined=no
+	continue
+	;;
+
+      -o) prev=output ;;
+
+      -release)
+	prev=release
+	continue
+	;;
+
+      -rpath)
+	prev=rpath
+	continue
+	;;
+
+      -R)
+	prev=xrpath
+	continue
+	;;
+
+      -R*)
+	dir=`$echo "X$arg" | $Xsed -e 's/^-R//'`
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	*)
+	  $echo "$modename: only absolute run-paths are allowed" 1>&2
+	  exit 1
+	  ;;
+	esac
+	case "$xrpath " in
+	*" $dir "*) ;;
+	*) xrpath="$xrpath $dir" ;;
+	esac
+	continue
+	;;
+
+      -static)
+	# The effects of -static are defined in a previous loop.
+	# We used to do the same as -all-static on platforms that
+	# didn't have a PIC flag, but the assumption that the effects
+	# would be equivalent was wrong.  It would break on at least
+	# Digital Unix and AIX.
+	continue
+	;;
+
+      -thread-safe)
+	thread_safe=yes
+	continue
+	;;
+
+      -version-info)
+	prev=vinfo
+	continue
+	;;
+
+      -Wc,*)
+	args=`$echo "X$arg" | $Xsed -e "$sed_quote_subst" -e 's/^-Wc,//'`
+	arg=
+	save_ifs="$IFS"; IFS=','
+	for flag in $args; do
+	  IFS="$save_ifs"
+	  case $flag in
+	    *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	    flag="\"$flag\""
+	    ;;
+	  esac
+	  arg="$arg $wl$flag"
+	  compiler_flags="$compiler_flags $flag"
+	done
+	IFS="$save_ifs"
+	arg=`$echo "X$arg" | $Xsed -e "s/^ //"`
+	;;
+
+      -Wl,*)
+	args=`$echo "X$arg" | $Xsed -e "$sed_quote_subst" -e 's/^-Wl,//'`
+	arg=
+	save_ifs="$IFS"; IFS=','
+	for flag in $args; do
+	  IFS="$save_ifs"
+	  case $flag in
+	    *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	    flag="\"$flag\""
+	    ;;
+	  esac
+	  arg="$arg $wl$flag"
+	  compiler_flags="$compiler_flags $wl$flag"
+	  linker_flags="$linker_flags $flag"
+	done
+	IFS="$save_ifs"
+	arg=`$echo "X$arg" | $Xsed -e "s/^ //"`
+	;;
+
+      -Xcompiler)
+	prev=xcompiler
+	continue
+	;;
+
+      -Xlinker)
+	prev=xlinker
+	continue
+	;;
+
+      # Some other compiler flag.
+      -* | +*)
+	# Unknown arguments in both finalize_command and compile_command need
+	# to be aesthetically quoted because they are evaled later.
+	arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
+	case $arg in
+	*[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	  arg="\"$arg\""
+	  ;;
+	esac
+	;;
+
+      *.lo | *.$objext)
+	# A library or standard object.
+	if test "$prev" = dlfiles; then
+	  # This file was specified with -dlopen.
+	  if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then
+	    dlfiles="$dlfiles $arg"
+	    prev=
+	    continue
+	  else
+	    # If libtool objects are unsupported, then we need to preload.
+	    prev=dlprefiles
+	  fi
+	fi
+
+	if test "$prev" = dlprefiles; then
+	  # Preload the old-style object.
+	  dlprefiles="$dlprefiles "`$echo "X$arg" | $Xsed -e "$lo2o"`
+	  prev=
+	else
+	  case $arg in
+	  *.lo) libobjs="$libobjs $arg" ;;
+	  *) objs="$objs $arg" ;;
+	  esac
+	fi
+	;;
+
+      *.$libext)
+	# An archive.
+	deplibs="$deplibs $arg"
+	old_deplibs="$old_deplibs $arg"
+	continue
+	;;
+
+      *.la)
+	# A libtool-controlled library.
+
+	if test "$prev" = dlfiles; then
+	  # This library was specified with -dlopen.
+	  dlfiles="$dlfiles $arg"
+	  prev=
+	elif test "$prev" = dlprefiles; then
+	  # The library was specified with -dlpreopen.
+	  dlprefiles="$dlprefiles $arg"
+	  prev=
+	else
+	  deplibs="$deplibs $arg"
+	fi
+	continue
+	;;
+
+      # Some other compiler argument.
+      *)
+	# Unknown arguments in both finalize_command and compile_command need
+	# to be aesthetically quoted because they are evaled later.
+	arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
+	case $arg in
+	*[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+	  arg="\"$arg\""
+	  ;;
+	esac
+	;;
+      esac # arg
+
+      # Now actually substitute the argument into the commands.
+      if test -n "$arg"; then
+	compile_command="$compile_command $arg"
+	finalize_command="$finalize_command $arg"
+      fi
+    done # argument parsing loop
+
+    if test -n "$prev"; then
+      $echo "$modename: the \`$prevarg' option requires an argument" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    if test "$export_dynamic" = yes && test -n "$export_dynamic_flag_spec"; then
+      eval arg=\"$export_dynamic_flag_spec\"
+      compile_command="$compile_command $arg"
+      finalize_command="$finalize_command $arg"
+    fi
+
+    # calculate the name of the file, without its directory
+    outputname=`$echo "X$output" | $Xsed -e 's%^.*/%%'`
+    libobjs_save="$libobjs"
+
+    if test -n "$shlibpath_var"; then
+      # get the directories listed in $shlibpath_var
+      eval shlib_search_path=\`\$echo \"X\${$shlibpath_var}\" \| \$Xsed -e \'s/:/ /g\'\`
+    else
+      shlib_search_path=
+    fi
+    eval sys_lib_search_path=\"$sys_lib_search_path_spec\"
+    eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\"
+
+    output_objdir=`$echo "X$output" | $Xsed -e 's%/[^/]*$%%'`
+    if test "X$output_objdir" = "X$output"; then
+      output_objdir="$objdir"
+    else
+      output_objdir="$output_objdir/$objdir"
+    fi
+    # Create the object directory.
+    if test ! -d $output_objdir; then
+      $show "$mkdir $output_objdir"
+      $run $mkdir $output_objdir
+      status=$?
+      if test $status -ne 0 && test ! -d $output_objdir; then
+	exit $status
+      fi
+    fi
+
+    # Determine the type of output
+    case $output in
+    "")
+      $echo "$modename: you must specify an output file" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+      ;;
+    *.$libext) linkmode=oldlib ;;
+    *.lo | *.$objext) linkmode=obj ;;
+    *.la) linkmode=lib ;;
+    *) linkmode=prog ;; # Anything else should be a program.
+    esac
+
+    specialdeplibs=
+    libs=
+    # Find all interdependent deplibs by searching for libraries
+    # that are linked more than once (e.g. -la -lb -la)
+    for deplib in $deplibs; do
+      if test "X$duplicate_deps" = "Xyes" ; then
+	case "$libs " in
+	*" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	esac
+      fi
+      libs="$libs $deplib"
+    done
+    deplibs=
+    newdependency_libs=
+    newlib_search_path=
+    need_relink=no # whether we're linking any uninstalled libtool libraries
+    notinst_deplibs= # not-installed libtool libraries
+    notinst_path= # paths that contain not-installed libtool libraries
+    case $linkmode in
+    lib)
+	passes="conv link"
+	for file in $dlfiles $dlprefiles; do
+	  case $file in
+	  *.la) ;;
+	  *)
+	    $echo "$modename: libraries can \`-dlopen' only libtool libraries: $file" 1>&2
+	    exit 1
+	    ;;
+	  esac
+	done
+	;;
+    prog)
+	compile_deplibs=
+	finalize_deplibs=
+	alldeplibs=no
+	newdlfiles=
+	newdlprefiles=
+	passes="conv scan dlopen dlpreopen link"
+	;;
+    *)  passes="conv"
+	;;
+    esac
+    for pass in $passes; do
+      if test $linkmode = prog; then
+	# Determine which files to process
+	case $pass in
+	dlopen)
+	  libs="$dlfiles"
+	  save_deplibs="$deplibs" # Collect dlpreopened libraries
+	  deplibs=
+	  ;;
+	dlpreopen) libs="$dlprefiles" ;;
+	link) libs="$deplibs %DEPLIBS% $dependency_libs" ;;
+	esac
+      fi
+      for deplib in $libs; do
+	lib=
+	found=no
+	case $deplib in
+	-l*)
+	  if test $linkmode = oldlib && test $linkmode = obj; then
+	    $echo "$modename: warning: \`-l' is ignored for archives/objects: $deplib" 1>&2
+	    continue
+	  fi
+	  if test $pass = conv; then
+	    deplibs="$deplib $deplibs"
+	    continue
+	  fi
+	  name=`$echo "X$deplib" | $Xsed -e 's/^-l//'`
+	  for searchdir in $newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path; do
+	    # Search the libtool library
+	    lib="$searchdir/lib${name}.la"
+	    if test -f "$lib"; then
+	      found=yes
+	      break
+	    fi
+	  done
+	  if test "$found" != yes; then
+	    # deplib doesn't seem to be a libtool library
+	    if test "$linkmode,$pass" = "prog,link"; then
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    else
+	      deplibs="$deplib $deplibs"
+	      test $linkmode = lib && newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    continue
+	  fi
+	  ;; # -l
+	-L*)
+	  case $linkmode in
+	  lib)
+	    deplibs="$deplib $deplibs"
+	    test $pass = conv && continue
+	    newdependency_libs="$deplib $newdependency_libs"
+	    newlib_search_path="$newlib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`
+	    ;;
+	  prog)
+	    if test $pass = conv; then
+	      deplibs="$deplib $deplibs"
+	      continue
+	    fi
+	    if test $pass = scan; then
+	      deplibs="$deplib $deplibs"
+	      newlib_search_path="$newlib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    ;;
+	  *)
+	    $echo "$modename: warning: \`-L' is ignored for archives/objects: $deplib" 1>&2
+	    ;;
+	  esac # linkmode
+	  continue
+	  ;; # -L
+	-R*)
+	  if test $pass = link; then
+	    dir=`$echo "X$deplib" | $Xsed -e 's/^-R//'`
+	    # Make sure the xrpath contains only unique directories.
+	    case "$xrpath " in
+	    *" $dir "*) ;;
+	    *) xrpath="$xrpath $dir" ;;
+	    esac
+	  fi
+	  deplibs="$deplib $deplibs"
+	  continue
+	  ;;
+	*.la) lib="$deplib" ;;
+	*.$libext)
+	  if test $pass = conv; then
+	    deplibs="$deplib $deplibs"
+	    continue
+	  fi
+	  case $linkmode in
+	  lib)
+	    if test "$deplibs_check_method" != pass_all; then
+	      echo
+	      echo "*** Warning: Trying to link with static lib archive $deplib."
+	      echo "*** I have the capability to make that library automatically link in when"
+	      echo "*** you link to this library.  But I can only do this if you have a"
+	      echo "*** shared version of the library, which you do not appear to have"
+	      echo "*** because the file extensions .$libext of this argument makes me believe"
+	      echo "*** that it is just a static archive that I should not used here."
+	    else
+	      echo
+	      echo "*** Warning: Linking the shared library $output against the"
+	      echo "*** static library $deplib is not portable!"
+	      deplibs="$deplib $deplibs"
+	    fi
+	    continue
+	    ;;
+	  prog)
+	    if test $pass != link; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    continue
+	    ;;
+	  esac # linkmode
+	  ;; # *.$libext
+	*.lo | *.$objext)
+	  if test $pass = dlpreopen || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then
+	    # If there is no dlopen support or we're linking statically,
+	    # we need to preload.
+	    newdlprefiles="$newdlprefiles $deplib"
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    newdlfiles="$newdlfiles $deplib"
+	  fi
+	  continue
+	  ;;
+	%DEPLIBS%)
+	  alldeplibs=yes
+	  continue
+	  ;;
+	esac # case $deplib
+	if test $found = yes || test -f "$lib"; then :
+	else
+	  $echo "$modename: cannot find the library \`$lib'" 1>&2
+	  exit 1
+	fi
+
+	# Check to see that this really is a libtool archive.
+	if (${SED} -e '2q' $lib | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then :
+	else
+	  $echo "$modename: \`$lib' is not a valid libtool archive" 1>&2
+	  exit 1
+	fi
+
+	ladir=`$echo "X$lib" | $Xsed -e 's%/[^/]*$%%'`
+	test "X$ladir" = "X$lib" && ladir="."
+
+	dlname=
+	dlopen=
+	dlpreopen=
+	libdir=
+	library_names=
+	old_library=
+	# If the library was installed with an old release of libtool,
+	# it will not redefine variable installed.
+	installed=yes
+
+	# Read the .la file
+	case $lib in
+	*/* | *\\*) . $lib ;;
+	*) . ./$lib ;;
+	esac
+
+	if test "$linkmode,$pass" = "lib,link" ||
+	   test "$linkmode,$pass" = "prog,scan" ||
+	   { test $linkmode = oldlib && test $linkmode = obj; }; then
+	   # Add dl[pre]opened files of deplib
+	  test -n "$dlopen" && dlfiles="$dlfiles $dlopen"
+	  test -n "$dlpreopen" && dlprefiles="$dlprefiles $dlpreopen"
+	fi
+
+	if test $pass = conv; then
+	  # Only check for convenience libraries
+	  deplibs="$lib $deplibs"
+	  if test -z "$libdir"; then
+	    if test -z "$old_library"; then
+	      $echo "$modename: cannot find name of link library for \`$lib'" 1>&2
+	      exit 1
+	    fi
+	    # It is a libtool convenience library, so add in its objects.
+	    convenience="$convenience $ladir/$objdir/$old_library"
+	    old_convenience="$old_convenience $ladir/$objdir/$old_library"
+	    tmp_libs=
+	    for deplib in $dependency_libs; do
+	      deplibs="$deplib $deplibs"
+              if test "X$duplicate_deps" = "Xyes" ; then
+		case "$tmp_libs " in
+		*" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+		esac
+              fi
+	      tmp_libs="$tmp_libs $deplib"
+	    done
+	  elif test $linkmode != prog && test $linkmode != lib; then
+	    $echo "$modename: \`$lib' is not a convenience library" 1>&2
+	    exit 1
+	  fi
+	  continue
+	fi # $pass = conv
+
+	# Get the name of the library we link against.
+	linklib=
+	for l in $old_library $library_names; do
+	  linklib="$l"
+	done
+	if test -z "$linklib"; then
+	  $echo "$modename: cannot find name of link library for \`$lib'" 1>&2
+	  exit 1
+	fi
+
+	# This library was specified with -dlopen.
+	if test $pass = dlopen; then
+	  if test -z "$libdir"; then
+	    $echo "$modename: cannot -dlopen a convenience library: \`$lib'" 1>&2
+	    exit 1
+	  fi
+	  if test -z "$dlname" || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then
+	    # If there is no dlname, no dlopen support or we're linking
+	    # statically, we need to preload.
+	    dlprefiles="$dlprefiles $lib"
+	  else
+	    newdlfiles="$newdlfiles $lib"
+	  fi
+	  continue
+	fi # $pass = dlopen
+
+	# We need an absolute path.
+	case $ladir in
+	[\\/]* | [A-Za-z]:[\\/]*) abs_ladir="$ladir" ;;
+	*)
+	  abs_ladir=`cd "$ladir" && pwd`
+	  if test -z "$abs_ladir"; then
+	    $echo "$modename: warning: cannot determine absolute directory name of \`$ladir'" 1>&2
+	    $echo "$modename: passing it literally to the linker, although it might fail" 1>&2
+	    abs_ladir="$ladir"
+	  fi
+	  ;;
+	esac
+	laname=`$echo "X$lib" | $Xsed -e 's%^.*/%%'`
+
+	# Find the relevant object directory and library name.
+	if test "X$installed" = Xyes; then
+	  if test ! -f "$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+	    $echo "$modename: warning: library \`$lib' was moved." 1>&2
+	    dir="$ladir"
+	    absdir="$abs_ladir"
+	    libdir="$abs_ladir"
+	  else
+	    dir="$libdir"
+	    absdir="$libdir"
+	  fi
+	else
+	  dir="$ladir/$objdir"
+	  absdir="$abs_ladir/$objdir"
+	  # Remove this search path later
+	  notinst_path="$notinst_path $abs_ladir"
+	fi # $installed = yes
+	name=`$echo "X$laname" | $Xsed -e 's/\.la$//' -e 's/^lib//'`
+
+	# This library was specified with -dlpreopen.
+	if test $pass = dlpreopen; then
+	  if test -z "$libdir"; then
+	    $echo "$modename: cannot -dlpreopen a convenience library: \`$lib'" 1>&2
+	    exit 1
+	  fi
+	  # Prefer using a static library (so that no silly _DYNAMIC symbols
+	  # are required to link).
+	  if test -n "$old_library"; then
+	    newdlprefiles="$newdlprefiles $dir/$old_library"
+	  # Otherwise, use the dlname, so that lt_dlopen finds it.
+	  elif test -n "$dlname"; then
+	    newdlprefiles="$newdlprefiles $dir/$dlname"
+	  else
+	    newdlprefiles="$newdlprefiles $dir/$linklib"
+	  fi
+	fi # $pass = dlpreopen
+
+	if test -z "$libdir"; then
+	  # Link the convenience library
+	  if test $linkmode = lib; then
+	    deplibs="$dir/$old_library $deplibs"
+	  elif test "$linkmode,$pass" = "prog,link"; then
+	    compile_deplibs="$dir/$old_library $compile_deplibs"
+	    finalize_deplibs="$dir/$old_library $finalize_deplibs"
+	  else
+	    deplibs="$lib $deplibs"
+	  fi
+	  continue
+	fi
+
+	if test $linkmode = prog && test $pass != link; then
+	  newlib_search_path="$newlib_search_path $ladir"
+	  deplibs="$lib $deplibs"
+
+	  linkalldeplibs=no
+	  if test "$link_all_deplibs" != no || test -z "$library_names" ||
+	     test "$build_libtool_libs" = no; then
+	    linkalldeplibs=yes
+	  fi
+
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    case $deplib in
+	    -L*) newlib_search_path="$newlib_search_path "`$echo "X$deplib" | $Xsed -e 's/^-L//'`;; ### testsuite: skip nested quoting test
+	    esac
+	    # Need to link against all dependency_libs?
+	    if test $linkalldeplibs = yes; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      # Need to hardcode shared library paths
+	      # or/and link against static libraries
+	      newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    if test "X$duplicate_deps" = "Xyes" ; then
+	      case "$tmp_libs " in
+	      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	      esac
+	    fi
+	    tmp_libs="$tmp_libs $deplib"
+	  done # for deplib
+	  continue
+	fi # $linkmode = prog...
+
+	link_static=no # Whether the deplib will be linked statically
+	if test -n "$library_names" &&
+	   { test "$prefer_static_libs" = no || test -z "$old_library"; }; then
+	  # Link against this shared library
+
+	  if test "$linkmode,$pass" = "prog,link" ||
+	   { test $linkmode = lib && test $hardcode_into_libs = yes; }; then
+	    # Hardcode the library path.
+	    # Skip directories that are in the system default run-time
+	    # search path.
+	    case " $sys_lib_dlsearch_path " in
+	    *" $absdir "*) ;;
+	    *)
+	      case "$compile_rpath " in
+	      *" $absdir "*) ;;
+	      *) compile_rpath="$compile_rpath $absdir"
+	      esac
+	      ;;
+	    esac
+	    case " $sys_lib_dlsearch_path " in
+	    *" $libdir "*) ;;
+	    *)
+	      case "$finalize_rpath " in
+	      *" $libdir "*) ;;
+	      *) finalize_rpath="$finalize_rpath $libdir"
+	      esac
+	      ;;
+	    esac
+	    if test $linkmode = prog; then
+	      # We need to hardcode the library path
+	      if test -n "$shlibpath_var"; then
+		# Make sure the rpath contains only unique directories.
+		case "$temp_rpath " in
+		*" $dir "*) ;;
+		*" $absdir "*) ;;
+		*) temp_rpath="$temp_rpath $dir" ;;
+		esac
+	      fi
+	    fi
+	  fi # $linkmode,$pass = prog,link...
+
+	  if test "$alldeplibs" = yes &&
+	     { test "$deplibs_check_method" = pass_all ||
+	       { test "$build_libtool_libs" = yes &&
+		 test -n "$library_names"; }; }; then
+	    # We only need to search for static libraries
+	    continue
+	  fi
+
+	  if test "$installed" = no; then
+	    notinst_deplibs="$notinst_deplibs $lib"
+	    need_relink=yes
+	  fi
+
+	  if test -n "$old_archive_from_expsyms_cmds"; then
+	    # figure out the soname
+	    set dummy $library_names
+	    realname="$2"
+	    shift; shift
+	    libname=`eval \\$echo \"$libname_spec\"`
+	    # use dlname if we got it. it's perfectly good, no?
+	    if test -n "$dlname"; then
+	      soname="$dlname"
+	    elif test -n "$soname_spec"; then
+	      # bleh windows
+	      case $host in
+	      *cygwin*)
+		major=`expr $current - $age`
+		versuffix="-$major"
+		;;
+	      esac
+	      eval soname=\"$soname_spec\"
+	    else
+	      soname="$realname"
+	    fi
+
+	    # Make a new name for the extract_expsyms_cmds to use
+	    soroot="$soname"
+	    soname=`echo $soroot | ${SED} -e 's/^.*\///'`
+	    newlib="libimp-`echo $soname | ${SED} 's/^lib//;s/\.dll$//'`.a"
+
+	    # If the library has no export list, then create one now
+	    if test -f "$output_objdir/$soname-def"; then :
+	    else
+	      $show "extracting exported symbol list from \`$soname'"
+	      save_ifs="$IFS"; IFS='~'
+	      eval cmds=\"$extract_expsyms_cmds\"
+	      for cmd in $cmds; do
+		IFS="$save_ifs"
+		$show "$cmd"
+		$run eval "$cmd" || exit $?
+	      done
+	      IFS="$save_ifs"
+	    fi
+
+	    # Create $newlib
+	    if test -f "$output_objdir/$newlib"; then :; else
+	      $show "generating import library for \`$soname'"
+	      save_ifs="$IFS"; IFS='~'
+	      eval cmds=\"$old_archive_from_expsyms_cmds\"
+	      for cmd in $cmds; do
+		IFS="$save_ifs"
+		$show "$cmd"
+		$run eval "$cmd" || exit $?
+	      done
+	      IFS="$save_ifs"
+	    fi
+	    # make sure the library variables are pointing to the new library
+	    dir=$output_objdir
+	    linklib=$newlib
+	  fi # test -n $old_archive_from_expsyms_cmds
+
+	  if test $linkmode = prog || test "$mode" != relink; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    lib_linked=yes
+	    case $hardcode_action in
+	    immediate | unsupported)
+	      if test "$hardcode_direct" = no; then
+		add="$dir/$linklib"
+	      elif test "$hardcode_minus_L" = no; then
+		case $host in
+		*-*-sunos*) add_shlibpath="$dir" ;;
+		esac
+		add_dir="-L$dir"
+		add="-l$name"
+	      elif test "$hardcode_shlibpath_var" = no; then
+		add_shlibpath="$dir"
+		add="-l$name"
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    relink)
+	      if test "$hardcode_direct" = yes; then
+		add="$dir/$linklib"
+	      elif test "$hardcode_minus_L" = yes; then
+		add_dir="-L$dir"
+		add="-l$name"
+	      elif test "$hardcode_shlibpath_var" = yes; then
+		add_shlibpath="$dir"
+		add="-l$name"
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    *) lib_linked=no ;;
+	    esac
+
+	    if test "$lib_linked" != yes; then
+	      $echo "$modename: configuration error: unsupported hardcode properties"
+	      exit 1
+	    fi
+
+	    if test -n "$add_shlibpath"; then
+	      case :$compile_shlibpath: in
+	      *":$add_shlibpath:"*) ;;
+	      *) compile_shlibpath="$compile_shlibpath$add_shlibpath:" ;;
+	      esac
+	    fi
+	    if test $linkmode = prog; then
+	      test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs"
+	      test -n "$add" && compile_deplibs="$add $compile_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	      if test "$hardcode_direct" != yes && \
+		 test "$hardcode_minus_L" != yes && \
+		 test "$hardcode_shlibpath_var" = yes; then
+		case :$finalize_shlibpath: in
+		*":$libdir:"*) ;;
+		*) finalize_shlibpath="$finalize_shlibpath$libdir:" ;;
+		esac
+	      fi
+	    fi
+	  fi
+
+	  if test $linkmode = prog || test "$mode" = relink; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    # Finalize command for both is simple: just hardcode it.
+	    if test "$hardcode_direct" = yes; then
+	      add="$libdir/$linklib"
+	    elif test "$hardcode_minus_L" = yes; then
+	      add_dir="-L$libdir"
+	      add="-l$name"
+	    elif test "$hardcode_shlibpath_var" = yes; then
+	      case :$finalize_shlibpath: in
+	      *":$libdir:"*) ;;
+	      *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;;
+	      esac
+	      add="-l$name"
+	    else
+	      # We cannot seem to hardcode it, guess we'll fake it.
+	      add_dir="-L$libdir"
+	      add="-l$name"
+	    fi
+
+	    if test $linkmode = prog; then
+	      test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs"
+	      test -n "$add" && finalize_deplibs="$add $finalize_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	    fi
+	  fi
+	elif test $linkmode = prog; then
+	  if test "$alldeplibs" = yes &&
+	     { test "$deplibs_check_method" = pass_all ||
+	       { test "$build_libtool_libs" = yes &&
+		 test -n "$library_names"; }; }; then
+	    # We only need to search for static libraries
+	    continue
+	  fi
+
+	  # Try to link the static library
+	  # Here we assume that one of hardcode_direct or hardcode_minus_L
+	  # is not unsupported.  This is valid on all known static and
+	  # shared platforms.
+	  if test "$hardcode_direct" != unsupported; then
+	    test -n "$old_library" && linklib="$old_library"
+	    compile_deplibs="$dir/$linklib $compile_deplibs"
+	    finalize_deplibs="$dir/$linklib $finalize_deplibs"
+	  else
+	    compile_deplibs="-l$name -L$dir $compile_deplibs"
+	    finalize_deplibs="-l$name -L$dir $finalize_deplibs"
+	  fi
+	elif test "$build_libtool_libs" = yes; then
+	  # Not a shared library
+	  if test "$deplibs_check_method" != pass_all; then
+	    # We're trying link a shared library against a static one
+	    # but the system doesn't support it.
+
+	    # Just print a warning and add the library to dependency_libs so
+	    # that the program can be linked against the static library.
+	    echo
+	    echo "*** Warning: This system can not link to static lib archive $lib."
+	    echo "*** I have the capability to make that library automatically link in when"
+	    echo "*** you link to this library.  But I can only do this if you have a"
+	    echo "*** shared version of the library, which you do not appear to have."
+	    if test "$module" = yes; then
+	      echo "*** But as you try to build a module library, libtool will still create "
+	      echo "*** a static module, that should work as long as the dlopening application"
+	      echo "*** is linked with the -dlopen flag to resolve symbols at runtime."
+	      if test -z "$global_symbol_pipe"; then
+		echo
+		echo "*** However, this would only work if libtool was able to extract symbol"
+		echo "*** lists from a program, using \`nm' or equivalent, but libtool could"
+		echo "*** not find such a program.  So, this module is probably useless."
+		echo "*** \`nm' from GNU binutils and a full rebuild may help."
+	      fi
+	      if test "$build_old_libs" = no; then
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  else
+	    convenience="$convenience $dir/$old_library"
+	    old_convenience="$old_convenience $dir/$old_library"
+	    deplibs="$dir/$old_library $deplibs"
+	    link_static=yes
+	  fi
+	fi # link shared/static library?
+
+	if test $linkmode = lib; then
+	  if test -n "$dependency_libs" &&
+	     { test $hardcode_into_libs != yes || test $build_old_libs = yes ||
+	       test $link_static = yes; }; then
+	    # Extract -R from dependency_libs
+	    temp_deplibs=
+	    for libdir in $dependency_libs; do
+	      case $libdir in
+	      -R*) temp_xrpath=`$echo "X$libdir" | $Xsed -e 's/^-R//'`
+		   case " $xrpath " in
+		   *" $temp_xrpath "*) ;;
+		   *) xrpath="$xrpath $temp_xrpath";;
+		   esac;;
+	      *) temp_deplibs="$temp_deplibs $libdir";;
+	      esac
+	    done
+	    dependency_libs="$temp_deplibs"
+	  fi
+
+	  newlib_search_path="$newlib_search_path $absdir"
+	  # Link against this library
+	  test "$link_static" = no && newdependency_libs="$abs_ladir/$laname $newdependency_libs"
+	  # ... and its dependency_libs
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    newdependency_libs="$deplib $newdependency_libs"
+	    if test "X$duplicate_deps" = "Xyes" ; then
+	      case "$tmp_libs " in
+	      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	      esac
+	    fi
+	    tmp_libs="$tmp_libs $deplib"
+	  done
+
+	  if test $link_all_deplibs != no; then
+	    # Add the search paths of all dependency libraries
+	    for deplib in $dependency_libs; do
+	      case $deplib in
+	      -L*) path="$deplib" ;;
+	      *.la)
+		dir=`$echo "X$deplib" | $Xsed -e 's%/[^/]*$%%'`
+		test "X$dir" = "X$deplib" && dir="."
+		# We need an absolute path.
+		case $dir in
+		[\\/]* | [A-Za-z]:[\\/]*) absdir="$dir" ;;
+		*)
+		  absdir=`cd "$dir" && pwd`
+		  if test -z "$absdir"; then
+		    $echo "$modename: warning: cannot determine absolute directory name of \`$dir'" 1>&2
+		    absdir="$dir"
+		  fi
+		  ;;
+		esac
+		if grep "^installed=no" $deplib > /dev/null; then
+		  path="-L$absdir/$objdir"
+		else
+		  eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib`
+		  if test -z "$libdir"; then
+		    $echo "$modename: \`$deplib' is not a valid libtool archive" 1>&2
+		    exit 1
+		  fi
+		  if test "$absdir" != "$libdir"; then
+		    $echo "$modename: warning: \`$deplib' seems to be moved" 1>&2
+		  fi
+		  path="-L$absdir"
+		fi
+		;;
+	      *) continue ;;
+	      esac
+	      case " $deplibs " in
+	      *" $path "*) ;;
+	      *) deplibs="$deplibs $path" ;;
+	      esac
+	    done
+	  fi # link_all_deplibs != no
+	fi # linkmode = lib
+      done # for deplib in $libs
+      if test $pass = dlpreopen; then
+	# Link the dlpreopened libraries before other libraries
+	for deplib in $save_deplibs; do
+	  deplibs="$deplib $deplibs"
+	done
+      fi
+      if test $pass != dlopen; then
+	test $pass != scan && dependency_libs="$newdependency_libs"
+	if test $pass != conv; then
+	  # Make sure lib_search_path contains only unique directories.
+	  lib_search_path=
+	  for dir in $newlib_search_path; do
+	    case "$lib_search_path " in
+	    *" $dir "*) ;;
+	    *) lib_search_path="$lib_search_path $dir" ;;
+	    esac
+	  done
+	  newlib_search_path=
+	fi
+
+	if test "$linkmode,$pass" != "prog,link"; then
+	  vars="deplibs"
+	else
+	  vars="compile_deplibs finalize_deplibs"
+	fi
+	for var in $vars dependency_libs; do
+	  # Add libraries to $var in reverse order
+	  eval tmp_libs=\"\$$var\"
+	  new_libs=
+	  for deplib in $tmp_libs; do
+	    case $deplib in
+	    -L*) new_libs="$deplib $new_libs" ;;
+	    *)
+	      case " $specialdeplibs " in
+	      *" $deplib "*) new_libs="$deplib $new_libs" ;;
+	      *)
+		case " $new_libs " in
+		*" $deplib "*) ;;
+		*) new_libs="$deplib $new_libs" ;;
+		esac
+		;;
+	      esac
+	      ;;
+	    esac
+	  done
+	  tmp_libs=
+	  for deplib in $new_libs; do
+	    case $deplib in
+	    -L*)
+	      case " $tmp_libs " in
+	      *" $deplib "*) ;;
+	      *) tmp_libs="$tmp_libs $deplib" ;;
+	      esac
+	      ;;
+	    *) tmp_libs="$tmp_libs $deplib" ;;
+	    esac
+	  done
+	  eval $var=\"$tmp_libs\"
+	done # for var
+      fi
+      if test "$pass" = "conv" &&
+       { test "$linkmode" = "lib" || test "$linkmode" = "prog"; }; then
+	libs="$deplibs" # reset libs
+	deplibs=
+      fi
+    done # for pass
+    if test $linkmode = prog; then
+      dlfiles="$newdlfiles"
+      dlprefiles="$newdlprefiles"
+    fi
+
+    case $linkmode in
+    oldlib)
+      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+	$echo "$modename: warning: \`-dlopen' is ignored for archives" 1>&2
+      fi
+
+      if test -n "$rpath"; then
+	$echo "$modename: warning: \`-rpath' is ignored for archives" 1>&2
+      fi
+
+      if test -n "$xrpath"; then
+	$echo "$modename: warning: \`-R' is ignored for archives" 1>&2
+      fi
+
+      if test -n "$vinfo"; then
+	$echo "$modename: warning: \`-version-info' is ignored for archives" 1>&2
+      fi
+
+      if test -n "$release"; then
+	$echo "$modename: warning: \`-release' is ignored for archives" 1>&2
+      fi
+
+      if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
+	$echo "$modename: warning: \`-export-symbols' is ignored for archives" 1>&2
+      fi
+
+      # Now set the variables for building old libraries.
+      build_libtool_libs=no
+      oldlibs="$output"
+      objs="$objs$old_deplibs"
+      ;;
+
+    lib)
+      # Make sure we only generate libraries of the form `libNAME.la'.
+      case $outputname in
+      lib*)
+	name=`$echo "X$outputname" | $Xsed -e 's/\.la$//' -e 's/^lib//'`
+	eval libname=\"$libname_spec\"
+	;;
+      *)
+	if test "$module" = no; then
+	  $echo "$modename: libtool library \`$output' must begin with \`lib'" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	fi
+	if test "$need_lib_prefix" != no; then
+	  # Add the "lib" prefix for modules if required
+	  name=`$echo "X$outputname" | $Xsed -e 's/\.la$//'`
+	  eval libname=\"$libname_spec\"
+	else
+	  libname=`$echo "X$outputname" | $Xsed -e 's/\.la$//'`
+	fi
+	;;
+      esac
+
+      if test -n "$objs"; then
+	if test "$deplibs_check_method" != pass_all; then
+	  $echo "$modename: cannot build libtool library \`$output' from non-libtool objects on this host:$objs" 2>&1
+	  exit 1
+	else
+	  echo
+	  echo "*** Warning: Linking the shared library $output against the non-libtool"
+	  echo "*** objects $objs is not portable!"
+	  libobjs="$libobjs $objs"
+	fi
+      fi
+
+      if test "$dlself" != no; then
+	$echo "$modename: warning: \`-dlopen self' is ignored for libtool libraries" 1>&2
+      fi
+
+      set dummy $rpath
+      if test $# -gt 2; then
+	$echo "$modename: warning: ignoring multiple \`-rpath's for a libtool library" 1>&2
+      fi
+      install_libdir="$2"
+
+      oldlibs=
+      if test -z "$rpath"; then
+	if test "$build_libtool_libs" = yes; then
+	  # Building a libtool convenience library.
+	  libext=al
+	  oldlibs="$output_objdir/$libname.$libext $oldlibs"
+	  build_libtool_libs=convenience
+	  build_old_libs=yes
+	fi
+
+	if test -n "$vinfo"; then
+	  $echo "$modename: warning: \`-version-info' is ignored for convenience libraries" 1>&2
+	fi
+
+	if test -n "$release"; then
+	  $echo "$modename: warning: \`-release' is ignored for convenience libraries" 1>&2
+	fi
+      else
+
+	# Parse the version information argument.
+	save_ifs="$IFS"; IFS=':'
+	set dummy $vinfo 0 0 0
+	IFS="$save_ifs"
+
+	if test -n "$8"; then
+	  $echo "$modename: too many parameters to \`-version-info'" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	fi
+
+	current="$2"
+	revision="$3"
+	age="$4"
+
+	# Check that each of the things are valid numbers.
+	case $current in
+	0 | [1-9] | [1-9][0-9] | [1-9][0-9][0-9]) ;;
+	*)
+	  $echo "$modename: CURRENT \`$current' is not a nonnegative integer" 1>&2
+	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
+	  exit 1
+	  ;;
+	esac
+
+	case $revision in
+	0 | [1-9] | [1-9][0-9] | [1-9][0-9][0-9]) ;;
+	*)
+	  $echo "$modename: REVISION \`$revision' is not a nonnegative integer" 1>&2
+	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
+	  exit 1
+	  ;;
+	esac
+
+	case $age in
+	0 | [1-9] | [1-9][0-9] | [1-9][0-9][0-9]) ;;
+	*)
+	  $echo "$modename: AGE \`$age' is not a nonnegative integer" 1>&2
+	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
+	  exit 1
+	  ;;
+	esac
+
+	if test $age -gt $current; then
+	  $echo "$modename: AGE \`$age' is greater than the current interface number \`$current'" 1>&2
+	  $echo "$modename: \`$vinfo' is not valid version information" 1>&2
+	  exit 1
+	fi
+
+	# Calculate the version variables.
+	major=
+	versuffix=
+	verstring=
+	case $version_type in
+	none) ;;
+
+	darwin)
+	  # Like Linux, but with the current version available in
+	  # verstring for coding it into the library header
+	  major=.`expr $current - $age`
+	  versuffix="$major.$age.$revision"
+	  # Darwin ld doesn't like 0 for these options...
+	  minor_current=`expr $current + 1`
+	  verstring="-compatibility_version $minor_current -current_version $minor_current.$revision"
+	  ;;
+
+	freebsd-aout)
+	  major=".$current"
+	  versuffix=".$current.$revision";
+	  ;;
+
+	freebsd-elf)
+	  major=".$current"
+	  versuffix=".$current";
+	  ;;
+
+	irix | nonstopux)
+	  major=`expr $current - $age + 1`
+
+	  case $version_type in
+	    nonstopux) verstring_prefix=nonstopux ;;
+	    *)	       verstring_prefix=sgi ;;
+	  esac
+	  verstring="$verstring_prefix$major.$revision"
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$revision
+	  while test $loop != 0; do
+	    iface=`expr $revision - $loop`
+	    loop=`expr $loop - 1`
+	    verstring="$verstring_prefix$major.$iface:$verstring"
+	  done
+
+	  # Before this point, $major must not contain `.'.
+	  major=.$major
+	  versuffix="$major.$revision"
+	  ;;
+
+	linux)
+	  major=.`expr $current - $age`
+	  versuffix="$major.$age.$revision"
+	  ;;
+
+	osf)
+	  major=.`expr $current - $age`
+	  versuffix=".$current.$age.$revision"
+	  verstring="$current.$age.$revision"
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$age
+	  while test $loop != 0; do
+	    iface=`expr $current - $loop`
+	    loop=`expr $loop - 1`
+	    verstring="$verstring:${iface}.0"
+	  done
+
+	  # Make executables depend on our current version.
+	  verstring="$verstring:${current}.0"
+	  ;;
+
+	sunos)
+	  major=".$current"
+	  versuffix=".$current.$revision"
+	  ;;
+
+	windows)
+	  # Use '-' rather than '.', since we only want one
+	  # extension on DOS 8.3 filesystems.
+	  major=`expr $current - $age`
+	  versuffix="-$major"
+	  ;;
+
+	*)
+	  $echo "$modename: unknown library version type \`$version_type'" 1>&2
+	  echo "Fatal configuration error.  See the $PACKAGE docs for more information." 1>&2
+	  exit 1
+	  ;;
+	esac
+
+	# Clear the version info if we defaulted, and they specified a release.
+	if test -z "$vinfo" && test -n "$release"; then
+	  major=
+	  verstring="0.0"
+	  case $version_type in
+	  darwin)
+	    # we can't check for "0.0" in archive_cmds due to quoting
+	    # problems, so we reset it completely
+	    verstring=""
+	    ;;
+	  *)
+	    verstring="0.0"
+	    ;;
+	  esac
+	  if test "$need_version" = no; then
+	    versuffix=
+	  else
+	    versuffix=".0.0"
+	  fi
+	fi
+
+	# Remove version info from name if versioning should be avoided
+	if test "$avoid_version" = yes && test "$need_version" = no; then
+	  major=
+	  versuffix=
+	  verstring=""
+	fi
+
+	# Check to see if the archive will have undefined symbols.
+	if test "$allow_undefined" = yes; then
+	  if test "$allow_undefined_flag" = unsupported; then
+	    $echo "$modename: warning: undefined symbols not allowed in $host shared libraries" 1>&2
+	    build_libtool_libs=no
+	    build_old_libs=yes
+	  fi
+	else
+	  # Don't allow undefined symbols.
+	  allow_undefined_flag="$no_undefined_flag"
+	fi
+      fi
+
+      if test "$mode" != relink; then
+	# Remove our outputs.
+	$show "${rm}r $output_objdir/$outputname $output_objdir/$libname.* $output_objdir/${libname}${release}.*"
+	$run ${rm}r $output_objdir/$outputname $output_objdir/$libname.* $output_objdir/${libname}${release}.*
+      fi
+
+      # Now set the variables for building old libraries.
+      if test "$build_old_libs" = yes && test "$build_libtool_libs" != convenience ; then
+	oldlibs="$oldlibs $output_objdir/$libname.$libext"
+
+	# Transform .lo files to .o files.
+	oldobjs="$objs "`$echo "X$libobjs" | $SP2NL | $Xsed -e '/\.'${libext}'$/d' -e "$lo2o" | $NL2SP`
+      fi
+
+      # Eliminate all temporary directories.
+      for path in $notinst_path; do
+	lib_search_path=`echo "$lib_search_path " | ${SED} -e 's% $path % %g'`
+	deplibs=`echo "$deplibs " | ${SED} -e 's% -L$path % %g'`
+	dependency_libs=`echo "$dependency_libs " | ${SED} -e 's% -L$path % %g'`
+      done
+
+      if test -n "$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	temp_xrpath=
+	for libdir in $xrpath; do
+	  temp_xrpath="$temp_xrpath -R$libdir"
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_rpath="$finalize_rpath $libdir" ;;
+	  esac
+	done
+	if test $hardcode_into_libs != yes || test $build_old_libs = yes; then
+	  dependency_libs="$temp_xrpath $dependency_libs"
+	fi
+      fi
+
+      # Make sure dlfiles contains only unique files that won't be dlpreopened
+      old_dlfiles="$dlfiles"
+      dlfiles=
+      for lib in $old_dlfiles; do
+	case " $dlprefiles $dlfiles " in
+	*" $lib "*) ;;
+	*) dlfiles="$dlfiles $lib" ;;
+	esac
+      done
+
+      # Make sure dlprefiles contains only unique files
+      old_dlprefiles="$dlprefiles"
+      dlprefiles=
+      for lib in $old_dlprefiles; do
+	case "$dlprefiles " in
+	*" $lib "*) ;;
+	*) dlprefiles="$dlprefiles $lib" ;;
+	esac
+      done
+
+      if test "$build_libtool_libs" = yes; then
+	if test -n "$rpath"; then
+	  case $host in
+	  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-beos*)
+	    # these systems don't actually have a c library (as such)!
+	    ;;
+	  *-*-rhapsody* | *-*-darwin1.[012])
+	    # Rhapsody C library is in the System framework
+	    deplibs="$deplibs -framework System"
+	    ;;
+	  *-*-netbsd*)
+	    # Don't link with libc until the a.out ld.so is fixed.
+	    ;;
+	  *-*-openbsd* | *-*-freebsd*)
+	    # Do not include libc due to us having libc/libc_r.
+	    ;;
+	  *)
+	    # Add libc to deplibs on all other systems if necessary.
+	    if test $build_libtool_need_lc = "yes"; then
+	      deplibs="$deplibs -lc"
+	    fi
+	    ;;
+	  esac
+	fi
+
+	# Transform deplibs into only deplibs that can be linked in shared.
+	name_save=$name
+	libname_save=$libname
+	release_save=$release
+	versuffix_save=$versuffix
+	major_save=$major
+	# I'm not sure if I'm treating the release correctly.  I think
+	# release should show up in the -l (ie -lgmp5) so we don't want to
+	# add it in twice.  Is that correct?
+	release=""
+	versuffix=""
+	major=""
+	newdeplibs=
+	droppeddeps=no
+	case $deplibs_check_method in
+	pass_all)
+	  # Don't check for shared/static.  Everything works.
+	  # This might be a little naive.  We might want to check
+	  # whether the library exists or not.	But this is on
+	  # osf3 & osf4 and I'm not really sure... Just
+	  # implementing what was already the behaviour.
+	  newdeplibs=$deplibs
+	  ;;
+	test_compile)
+	  # This code stresses the "libraries are programs" paradigm to its
+	  # limits. Maybe even breaks it.  We compile a program, linking it
+	  # against the deplibs as a proxy for the library.  Then we can check
+	  # whether they linked in statically or dynamically with ldd.
+	  $rm conftest.c
+	  cat > conftest.c <<EOF
+	  int main() { return 0; }
+EOF
+	  $rm conftest
+	  $CC -o conftest conftest.c $deplibs
+	  if test $? -eq 0 ; then
+	    ldd_output=`ldd conftest`
+	    for i in $deplibs; do
+	      name="`expr $i : '-l\(.*\)'`"
+	      # If $name is empty we are operating on a -L argument.
+	      if test -n "$name" && test "$name" != "0"; then
+		libname=`eval \\$echo \"$libname_spec\"`
+		deplib_matches=`eval \\$echo \"$library_names_spec\"`
+		set dummy $deplib_matches
+		deplib_match=$2
+		if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
+		  newdeplibs="$newdeplibs $i"
+		else
+		  droppeddeps=yes
+		  echo
+		  echo "*** Warning: dynamic linker does not accept needed library $i."
+		  echo "*** I have the capability to make that library automatically link in when"
+		  echo "*** you link to this library.  But I can only do this if you have a"
+		  echo "*** shared version of the library, which I believe you do not have"
+		  echo "*** because a test_compile did reveal that the linker did not use it for"
+		  echo "*** its dynamic dependency list that programs get resolved with at runtime."
+		fi
+	      else
+		newdeplibs="$newdeplibs $i"
+	      fi
+	    done
+	  else
+	    # Error occured in the first compile.  Let's try to salvage
+	    # the situation: Compile a separate program for each library.
+	    for i in $deplibs; do
+	      name="`expr $i : '-l\(.*\)'`"
+	     # If $name is empty we are operating on a -L argument.
+	      if test -n "$name" && test "$name" != "0"; then
+		$rm conftest
+		$CC -o conftest conftest.c $i
+		# Did it work?
+		if test $? -eq 0 ; then
+		  ldd_output=`ldd conftest`
+		  libname=`eval \\$echo \"$libname_spec\"`
+		  deplib_matches=`eval \\$echo \"$library_names_spec\"`
+		  set dummy $deplib_matches
+		  deplib_match=$2
+		  if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
+		    newdeplibs="$newdeplibs $i"
+		  else
+		    droppeddeps=yes
+		    echo
+		    echo "*** Warning: dynamic linker does not accept needed library $i."
+		    echo "*** I have the capability to make that library automatically link in when"
+		    echo "*** you link to this library.  But I can only do this if you have a"
+		    echo "*** shared version of the library, which you do not appear to have"
+		    echo "*** because a test_compile did reveal that the linker did not use this one"
+		    echo "*** as a dynamic dependency that programs can get resolved with at runtime."
+		  fi
+		else
+		  droppeddeps=yes
+		  echo
+		  echo "*** Warning!  Library $i is needed by this library but I was not able to"
+		  echo "***  make it link in!  You will probably need to install it or some"
+		  echo "*** library that it depends on before this library will be fully"
+		  echo "*** functional.  Installing it before continuing would be even better."
+		fi
+	      else
+		newdeplibs="$newdeplibs $i"
+	      fi
+	    done
+	  fi
+	  ;;
+	file_magic*)
+	  set dummy $deplibs_check_method
+	  file_magic_regex=`expr "$deplibs_check_method" : "$2 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    name="`expr $a_deplib : '-l\(.*\)'`"
+	    # If $name is empty we are operating on a -L argument.
+	    if test -n "$name" && test "$name" != "0"; then
+	      libname=`eval \\$echo \"$libname_spec\"`
+	      for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		    potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
+		    for potent_lib in $potential_libs; do
+		      # Follow soft links.
+		      if ls -lLd "$potent_lib" 2>/dev/null \
+			 | grep " -> " >/dev/null; then
+			continue
+		      fi
+		      # The statement above tries to avoid entering an
+		      # endless loop below, in case of cyclic links.
+		      # We might still enter an endless loop, since a link
+		      # loop can be closed while we follow links,
+		      # but so what?
+		      potlib="$potent_lib"
+		      while test -h "$potlib" 2>/dev/null; do
+			potliblink=`ls -ld $potlib | ${SED} 's/.* -> //'`
+			case $potliblink in
+			[\\/]* | [A-Za-z]:[\\/]*) potlib="$potliblink";;
+			*) potlib=`$echo "X$potlib" | $Xsed -e 's,[^/]*$,,'`"$potliblink";;
+			esac
+		      done
+		      if eval $file_magic_cmd \"\$potlib\" 2>/dev/null \
+			 | ${SED} 10q \
+			 | egrep "$file_magic_regex" > /dev/null; then
+			newdeplibs="$newdeplibs $a_deplib"
+			a_deplib=""
+			break 2
+		      fi
+		    done
+	      done
+	      if test -n "$a_deplib" ; then
+		droppeddeps=yes
+		echo
+		echo "*** Warning: linker path does not have real file for library $a_deplib."
+		echo "*** I have the capability to make that library automatically link in when"
+		echo "*** you link to this library.  But I can only do this if you have a"
+		echo "*** shared version of the library, which you do not appear to have"
+		echo "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib" ; then
+		  echo "*** with $libname but no candidates were found. (...for file magic test)"
+		else
+		  echo "*** with $libname and none of the candidates passed a file format test"
+		  echo "*** using a file magic. Last file checked: $potlib"
+		fi
+	      fi
+	    else
+	      # Add a -L argument.
+	      newdeplibs="$newdeplibs $a_deplib"
+	    fi
+	  done # Gone through all deplibs.
+	  ;;
+	match_pattern*)
+	  set dummy $deplibs_check_method
+	  match_pattern_regex=`expr "$deplibs_check_method" : "$2 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    name="`expr $a_deplib : '-l\(.*\)'`"
+	    # If $name is empty we are operating on a -L argument.
+	    if test -n "$name" && test "$name" != "0"; then
+	      libname=`eval \\$echo \"$libname_spec\"`
+	      for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
+		for potent_lib in $potential_libs; do
+		  potlib="$potent_lib" # see symlink-check below in file_magic test
+		  if eval echo \"$potent_lib\" 2>/dev/null \
+		      | ${SED} 10q \
+		      | egrep "$match_pattern_regex" > /dev/null; then
+		    newdeplibs="$newdeplibs $a_deplib"
+		    a_deplib=""
+		    break 2
+		  fi
+		done
+	      done
+	      if test -n "$a_deplib" ; then
+		droppeddeps=yes
+		echo
+		echo "*** Warning: linker path does not have real file for library $a_deplib."
+		echo "*** I have the capability to make that library automatically link in when"
+		echo "*** you link to this library.  But I can only do this if you have a"
+		echo "*** shared version of the library, which you do not appear to have"
+		echo "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib" ; then
+		  echo "*** with $libname but no candidates were found. (...for regex pattern test)"
+		else
+		  echo "*** with $libname and none of the candidates passed a file format test"
+		  echo "*** using a regex pattern. Last file checked: $potlib"
+		fi
+	      fi
+	    else
+	      # Add a -L argument.
+	      newdeplibs="$newdeplibs $a_deplib"
+	    fi
+	  done # Gone through all deplibs.
+	  ;;
+	none | unknown | *)
+	  newdeplibs=""
+	  if $echo "X $deplibs" | $Xsed -e 's/ -lc$//' \
+	       -e 's/ -[LR][^ ]*//g' -e 's/[	]//g' |
+	     grep . >/dev/null; then
+	    echo
+	    if test "X$deplibs_check_method" = "Xnone"; then
+	      echo "*** Warning: inter-library dependencies are not supported in this platform."
+	    else
+	      echo "*** Warning: inter-library dependencies are not known to be supported."
+	    fi
+	    echo "*** All declared inter-library dependencies are being dropped."
+	    droppeddeps=yes
+	  fi
+	  ;;
+	esac
+	versuffix=$versuffix_save
+	major=$major_save
+	release=$release_save
+	libname=$libname_save
+	name=$name_save
+
+	case $host in
+	*-*-rhapsody* | *-*-darwin1.[012])
+	  # On Rhapsody replace the C library is the System framework
+	  newdeplibs=`$echo "X $newdeplibs" | $Xsed -e 's/ -lc / -framework System /'`
+	  ;;
+	esac
+
+	if test "$droppeddeps" = yes; then
+	  if test "$module" = yes; then
+	    echo
+	    echo "*** Warning: libtool could not satisfy all declared inter-library"
+	    echo "*** dependencies of module $libname.	Therefore, libtool will create"
+	    echo "*** a static module, that should work as long as the dlopening"
+	    echo "*** application is linked with the -dlopen flag."
+	    if test -z "$global_symbol_pipe"; then
+	      echo
+	      echo "*** However, this would only work if libtool was able to extract symbol"
+	      echo "*** lists from a program, using \`nm' or equivalent, but libtool could"
+	      echo "*** not find such a program.  So, this module is probably useless."
+	      echo "*** \`nm' from GNU binutils and a full rebuild may help."
+	    fi
+	    if test "$build_old_libs" = no; then
+	      oldlibs="$output_objdir/$libname.$libext"
+	      build_libtool_libs=module
+	      build_old_libs=yes
+	    else
+	      build_libtool_libs=no
+	    fi
+	  else
+	    echo "*** The inter-library dependencies that have been dropped here will be"
+	    echo "*** automatically added whenever a program is linked with this library"
+	    echo "*** or is declared to -dlopen it."
+
+	    if test $allow_undefined = no; then
+	      echo
+	      echo "*** Since this library must not contain undefined symbols,"
+	      echo "*** because either the platform does not support them or"
+	      echo "*** it was explicitly requested with -no-undefined,"
+	      echo "*** libtool will only create a static version of it."
+	      if test "$build_old_libs" = no; then
+		oldlibs="$output_objdir/$libname.$libext"
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  fi
+	fi
+	# Done checking deplibs!
+	deplibs=$newdeplibs
+      fi
+
+      # All the library-specific variables (install_libdir is set above).
+      library_names=
+      old_library=
+      dlname=
+
+      # Test again, we may have decided not to build it any more
+      if test "$build_libtool_libs" = yes; then
+	if test $hardcode_into_libs = yes; then
+	  # Hardcode the library paths
+	  hardcode_libdirs=
+	  dep_rpath=
+	  rpath="$finalize_rpath"
+	  test "$mode" != relink && rpath="$compile_rpath$rpath"
+	  for libdir in $rpath; do
+	    if test -n "$hardcode_libdir_flag_spec"; then
+	      if test -n "$hardcode_libdir_separator"; then
+		if test -z "$hardcode_libdirs"; then
+		  hardcode_libdirs="$libdir"
+		else
+		  # Just accumulate the unique libdirs.
+		  case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+		  *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		    ;;
+		  *)
+		    hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		    ;;
+		  esac
+		fi
+	      else
+		eval flag=\"$hardcode_libdir_flag_spec\"
+		dep_rpath="$dep_rpath $flag"
+	      fi
+	    elif test -n "$runpath_var"; then
+	      case "$perm_rpath " in
+	      *" $libdir "*) ;;
+	      *) perm_rpath="$perm_rpath $libdir" ;;
+	      esac
+	    fi
+	  done
+	  # Substitute the hardcoded libdirs into the rpath.
+	  if test -n "$hardcode_libdir_separator" &&
+	     test -n "$hardcode_libdirs"; then
+	    libdir="$hardcode_libdirs"
+	    eval dep_rpath=\"$hardcode_libdir_flag_spec\"
+	  fi
+	  if test -n "$runpath_var" && test -n "$perm_rpath"; then
+	    # We should set the runpath_var.
+	    rpath=
+	    for dir in $perm_rpath; do
+	      rpath="$rpath$dir:"
+	    done
+	    eval "$runpath_var='$rpath\$$runpath_var'; export $runpath_var"
+	  fi
+	  test -n "$dep_rpath" && deplibs="$dep_rpath $deplibs"
+	fi
+
+	shlibpath="$finalize_shlibpath"
+	test "$mode" != relink && shlibpath="$compile_shlibpath$shlibpath"
+	if test -n "$shlibpath"; then
+	  eval "$shlibpath_var='$shlibpath\$$shlibpath_var'; export $shlibpath_var"
+	fi
+
+	# Get the real and link names of the library.
+	eval library_names=\"$library_names_spec\"
+	set dummy $library_names
+	realname="$2"
+	shift; shift
+
+	if test -n "$soname_spec"; then
+	  eval soname=\"$soname_spec\"
+	else
+	  soname="$realname"
+	fi
+	test -z "$dlname" && dlname=$soname
+
+	lib="$output_objdir/$realname"
+	for link
+	do
+	  linknames="$linknames $link"
+	done
+
+	# Ensure that we have .o objects for linkers which dislike .lo
+	# (e.g. aix) in case we are running --disable-static
+	for obj in $libobjs; do
+	  xdir=`$echo "X$obj" | $Xsed -e 's%/[^/]*$%%'`
+	  if test "X$xdir" = "X$obj"; then
+	    xdir="."
+	  else
+	    xdir="$xdir"
+	  fi
+	  baseobj=`$echo "X$obj" | $Xsed -e 's%^.*/%%'`
+	  oldobj=`$echo "X$baseobj" | $Xsed -e "$lo2o"`
+	  if test ! -f $xdir/$oldobj; then
+	    $show "(cd $xdir && ${LN_S} $baseobj $oldobj)"
+	    $run eval '(cd $xdir && ${LN_S} $baseobj $oldobj)' || exit $?
+	  fi
+	done
+
+	# Use standard objects if they are pic
+	test -z "$pic_flag" && libobjs=`$echo "X$libobjs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+
+	# Prepare the list of exported symbols
+	if test -z "$export_symbols"; then
+	  if test "$always_export_symbols" = yes || test -n "$export_symbols_regex"; then
+	    $show "generating symbol list for \`$libname.la'"
+	    export_symbols="$output_objdir/$libname.exp"
+	    $run $rm $export_symbols
+	    eval cmds=\"$export_symbols_cmds\"
+	    save_ifs="$IFS"; IFS='~'
+	    for cmd in $cmds; do
+	      IFS="$save_ifs"
+	      $show "$cmd"
+	      $run eval "$cmd" || exit $?
+	    done
+	    IFS="$save_ifs"
+	    if test -n "$export_symbols_regex"; then
+	      $show "egrep -e \"$export_symbols_regex\" \"$export_symbols\" > \"${export_symbols}T\""
+	      $run eval 'egrep -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"'
+	      $show "$mv \"${export_symbols}T\" \"$export_symbols\""
+	      $run eval '$mv "${export_symbols}T" "$export_symbols"'
+	    fi
+	  fi
+	fi
+
+	if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	  $run eval '$echo "X$include_expsyms" | $SP2NL >> "$export_symbols"'
+	fi
+
+	if test -n "$convenience"; then
+	  if test -n "$whole_archive_flag_spec"; then
+	    eval libobjs=\"\$libobjs $whole_archive_flag_spec\"
+	  else
+	    gentop="$output_objdir/${outputname}x"
+	    $show "${rm}r $gentop"
+	    $run ${rm}r "$gentop"
+	    $show "mkdir $gentop"
+	    $run mkdir "$gentop"
+	    status=$?
+	    if test $status -ne 0 && test ! -d "$gentop"; then
+	      exit $status
+	    fi
+	    generated="$generated $gentop"
+
+	    for xlib in $convenience; do
+	      # Extract the objects.
+	      case $xlib in
+	      [\\/]* | [A-Za-z]:[\\/]*) xabs="$xlib" ;;
+	      *) xabs=`pwd`"/$xlib" ;;
+	      esac
+	      xlib=`$echo "X$xlib" | $Xsed -e 's%^.*/%%'`
+	      xdir="$gentop/$xlib"
+
+	      $show "${rm}r $xdir"
+	      $run ${rm}r "$xdir"
+	      $show "mkdir $xdir"
+	      $run mkdir "$xdir"
+	      status=$?
+	      if test $status -ne 0 && test ! -d "$xdir"; then
+		exit $status
+	      fi
+	      $show "(cd $xdir && $AR x $xabs)"
+	      $run eval "(cd \$xdir && $AR x \$xabs)" || exit $?
+
+	      libobjs="$libobjs "`find $xdir -name \*.o -print -o -name \*.lo -print | $NL2SP`
+	    done
+	  fi
+	fi
+
+	if test "$thread_safe" = yes && test -n "$thread_safe_flag_spec"; then
+	  eval flag=\"$thread_safe_flag_spec\"
+	  linker_flags="$linker_flags $flag"
+	fi
+
+	# Make a backup of the uninstalled library when relinking
+	if test "$mode" = relink; then
+	  $run eval '(cd $output_objdir && $rm ${realname}U && $mv $realname ${realname}U)' || exit $?
+	fi
+
+	# Do each of the archive commands.
+	if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then
+	  eval cmds=\"$archive_expsym_cmds\"
+	else
+	  save_deplibs="$deplibs"
+	  for conv in $convenience; do
+	    tmp_deplibs=
+	    for test_deplib in $deplibs; do
+	      if test "$test_deplib" != "$conv"; then
+		tmp_deplibs="$tmp_deplibs $test_deplib"
+	      fi
+	    done
+	    deplibs="$tmp_deplibs"
+	  done
+	  eval cmds=\"$archive_cmds\"
+	  deplibs="$save_deplibs"
+	fi
+	save_ifs="$IFS"; IFS='~'
+	for cmd in $cmds; do
+	  IFS="$save_ifs"
+	  $show "$cmd"
+	  $run eval "$cmd" || exit $?
+	done
+	IFS="$save_ifs"
+
+	# Restore the uninstalled library and exit
+	if test "$mode" = relink; then
+	  $run eval '(cd $output_objdir && $rm ${realname}T && $mv $realname ${realname}T && $mv "$realname"U $realname)' || exit $?
+	  exit 0
+	fi
+
+	# Create links to the real library.
+	for linkname in $linknames; do
+	  if test "$realname" != "$linkname"; then
+	    $show "(cd $output_objdir && $rm $linkname && $LN_S $realname $linkname)"
+	    $run eval '(cd $output_objdir && $rm $linkname && $LN_S $realname $linkname)' || exit $?
+	  fi
+	done
+
+	# If -module or -export-dynamic was specified, set the dlname.
+	if test "$module" = yes || test "$export_dynamic" = yes; then
+	  # On all known operating systems, these are identical.
+	  dlname="$soname"
+	fi
+      fi
+      ;;
+
+    obj)
+      if test -n "$deplibs"; then
+	$echo "$modename: warning: \`-l' and \`-L' are ignored for objects" 1>&2
+      fi
+
+      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+	$echo "$modename: warning: \`-dlopen' is ignored for objects" 1>&2
+      fi
+
+      if test -n "$rpath"; then
+	$echo "$modename: warning: \`-rpath' is ignored for objects" 1>&2
+      fi
+
+      if test -n "$xrpath"; then
+	$echo "$modename: warning: \`-R' is ignored for objects" 1>&2
+      fi
+
+      if test -n "$vinfo"; then
+	$echo "$modename: warning: \`-version-info' is ignored for objects" 1>&2
+      fi
+
+      if test -n "$release"; then
+	$echo "$modename: warning: \`-release' is ignored for objects" 1>&2
+      fi
+
+      case $output in
+      *.lo)
+	if test -n "$objs$old_deplibs"; then
+	  $echo "$modename: cannot build library object \`$output' from non-libtool objects" 1>&2
+	  exit 1
+	fi
+	libobj="$output"
+	obj=`$echo "X$output" | $Xsed -e "$lo2o"`
+	;;
+      *)
+	libobj=
+	obj="$output"
+	;;
+      esac
+
+      # Delete the old objects.
+      $run $rm $obj $libobj
+
+      # Objects from convenience libraries.  This assumes
+      # single-version convenience libraries.  Whenever we create
+      # different ones for PIC/non-PIC, this we'll have to duplicate
+      # the extraction.
+      reload_conv_objs=
+      gentop=
+      # reload_cmds runs $LD directly, so let us get rid of
+      # -Wl from whole_archive_flag_spec
+      wl=
+
+      if test -n "$convenience"; then
+	if test -n "$whole_archive_flag_spec"; then
+	  eval reload_conv_objs=\"\$reload_objs $whole_archive_flag_spec\"
+	else
+	  gentop="$output_objdir/${obj}x"
+	  $show "${rm}r $gentop"
+	  $run ${rm}r "$gentop"
+	  $show "mkdir $gentop"
+	  $run mkdir "$gentop"
+	  status=$?
+	  if test $status -ne 0 && test ! -d "$gentop"; then
+	    exit $status
+	  fi
+	  generated="$generated $gentop"
+
+	  for xlib in $convenience; do
+	    # Extract the objects.
+	    case $xlib in
+	    [\\/]* | [A-Za-z]:[\\/]*) xabs="$xlib" ;;
+	    *) xabs=`pwd`"/$xlib" ;;
+	    esac
+	    xlib=`$echo "X$xlib" | $Xsed -e 's%^.*/%%'`
+	    xdir="$gentop/$xlib"
+
+	    $show "${rm}r $xdir"
+	    $run ${rm}r "$xdir"
+	    $show "mkdir $xdir"
+	    $run mkdir "$xdir"
+	    status=$?
+	    if test $status -ne 0 && test ! -d "$xdir"; then
+	      exit $status
+	    fi
+	    $show "(cd $xdir && $AR x $xabs)"
+	    $run eval "(cd \$xdir && $AR x \$xabs)" || exit $?
+
+	    reload_conv_objs="$reload_objs "`find $xdir -name \*.o -print -o -name \*.lo -print | $NL2SP`
+	  done
+	fi
+      fi
+
+      # Create the old-style object.
+      reload_objs="$objs$old_deplibs "`$echo "X$libobjs" | $SP2NL | $Xsed -e '/\.'${libext}$'/d' -e '/\.lib$/d' -e "$lo2o" | $NL2SP`" $reload_conv_objs" ### testsuite: skip nested quoting test
+
+      output="$obj"
+      eval cmds=\"$reload_cmds\"
+      save_ifs="$IFS"; IFS='~'
+      for cmd in $cmds; do
+	IFS="$save_ifs"
+	$show "$cmd"
+	$run eval "$cmd" || exit $?
+      done
+      IFS="$save_ifs"
+
+      # Exit if we aren't doing a library object file.
+      if test -z "$libobj"; then
+	if test -n "$gentop"; then
+	  $show "${rm}r $gentop"
+	  $run ${rm}r $gentop
+	fi
+
+	exit 0
+      fi
+
+      if test "$build_libtool_libs" != yes; then
+	if test -n "$gentop"; then
+	  $show "${rm}r $gentop"
+	  $run ${rm}r $gentop
+	fi
+
+	# Create an invalid libtool object if no PIC, so that we don't
+	# accidentally link it into a program.
+	$show "echo timestamp > $libobj"
+	$run eval "echo timestamp > $libobj" || exit $?
+	exit 0
+      fi
+
+      if test -n "$pic_flag" || test "$pic_mode" != default; then
+	# Only do commands if we really have different PIC objects.
+	reload_objs="$libobjs $reload_conv_objs"
+	output="$libobj"
+	eval cmds=\"$reload_cmds\"
+	save_ifs="$IFS"; IFS='~'
+	for cmd in $cmds; do
+	  IFS="$save_ifs"
+	  $show "$cmd"
+	  $run eval "$cmd" || exit $?
+	done
+	IFS="$save_ifs"
+      else
+	# Just create a symlink.
+	$show $rm $libobj
+	$run $rm $libobj
+	xdir=`$echo "X$libobj" | $Xsed -e 's%/[^/]*$%%'`
+	if test "X$xdir" = "X$libobj"; then
+	  xdir="."
+	else
+	  xdir="$xdir"
+	fi
+	baseobj=`$echo "X$libobj" | $Xsed -e 's%^.*/%%'`
+	oldobj=`$echo "X$baseobj" | $Xsed -e "$lo2o"`
+	$show "(cd $xdir && $LN_S $oldobj $baseobj)"
+	$run eval '(cd $xdir && $LN_S $oldobj $baseobj)' || exit $?
+      fi
+
+      if test -n "$gentop"; then
+	$show "${rm}r $gentop"
+	$run ${rm}r $gentop
+      fi
+
+      exit 0
+      ;;
+
+    prog)
+      case $host in
+	*cygwin*) output=`echo $output | ${SED} -e 's,.exe$,,;s,$,.exe,'` ;;
+      esac
+      if test -n "$vinfo"; then
+	$echo "$modename: warning: \`-version-info' is ignored for programs" 1>&2
+      fi
+
+      if test -n "$release"; then
+	$echo "$modename: warning: \`-release' is ignored for programs" 1>&2
+      fi
+
+      if test "$preload" = yes; then
+	if test "$dlopen_support" = unknown && test "$dlopen_self" = unknown &&
+	   test "$dlopen_self_static" = unknown; then
+	  $echo "$modename: warning: \`AC_LIBTOOL_DLOPEN' not used. Assuming no dlopen support."
+	fi
+      fi
+
+      case $host in
+      *-*-rhapsody* | *-*-darwin1.[012])
+	# On Rhapsody replace the C library is the System framework
+	compile_deplibs=`$echo "X $compile_deplibs" | $Xsed -e 's/ -lc / -framework System /'`
+	finalize_deplibs=`$echo "X $finalize_deplibs" | $Xsed -e 's/ -lc / -framework System /'`
+	case $host in
+	*darwin*)
+	  # Don't allow lazy linking, it breaks C++ global constructors
+	  compile_command="$compile_command ${wl}-bind_at_load"
+	  finalize_command="$finalize_command ${wl}-bind_at_load"
+	  ;;
+	esac
+	;;
+      esac
+
+      compile_command="$compile_command $compile_deplibs"
+      finalize_command="$finalize_command $finalize_deplibs"
+
+      if test -n "$rpath$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	for libdir in $rpath $xrpath; do
+	  # This is the magic to use -rpath.
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_rpath="$finalize_rpath $libdir" ;;
+	  esac
+	done
+      fi
+
+      # Now hardcode the library paths
+      rpath=
+      hardcode_libdirs=
+      for libdir in $compile_rpath $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs="$libdir"
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    rpath="$rpath $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) perm_rpath="$perm_rpath $libdir" ;;
+	  esac
+	fi
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*)
+	  case :$dllsearchpath: in
+	  *":$libdir:"*) ;;
+	  *) dllsearchpath="$dllsearchpath:$libdir";;
+	  esac
+	  ;;
+	esac
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir="$hardcode_libdirs"
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      compile_rpath="$rpath"
+
+      rpath=
+      hardcode_libdirs=
+      for libdir in $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs="$libdir"
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    rpath="$rpath $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$finalize_perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_perm_rpath="$finalize_perm_rpath $libdir" ;;
+	  esac
+	fi
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir="$hardcode_libdirs"
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      finalize_rpath="$rpath"
+
+      if test -n "$libobjs" && test "$build_old_libs" = yes; then
+	# Transform all the library objects into standard objects.
+	compile_command=`$echo "X$compile_command" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+	finalize_command=`$echo "X$finalize_command" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+      fi
+
+      dlsyms=
+      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+	if test -n "$NM" && test -n "$global_symbol_pipe"; then
+	  dlsyms="${outputname}S.c"
+	else
+	  $echo "$modename: not configured to extract global symbols from dlpreopened files" 1>&2
+	fi
+      fi
+
+      if test -n "$dlsyms"; then
+	case $dlsyms in
+	"") ;;
+	*.c)
+	  # Discover the nlist of each of the dlfiles.
+	  nlist="$output_objdir/${outputname}.nm"
+
+	  $show "$rm $nlist ${nlist}S ${nlist}T"
+	  $run $rm "$nlist" "${nlist}S" "${nlist}T"
+
+	  # Parse the name list into a source file.
+	  $show "creating $output_objdir/$dlsyms"
+
+	  test -z "$run" && $echo > "$output_objdir/$dlsyms" "\
+/* $dlsyms - symbol resolution table for \`$outputname' dlsym emulation. */
+/* Generated by $PROGRAM - GNU $PACKAGE $VERSION$TIMESTAMP */
+
+#ifdef __cplusplus
+extern \"C\" {
+#endif
+
+/* Prevent the only kind of declaration conflicts we can make. */
+#define lt_preloaded_symbols some_other_symbol
+
+/* External symbol declarations for the compiler. */\
+"
+
+	  if test "$dlself" = yes; then
+	    $show "generating symbol list for \`$output'"
+
+	    test -z "$run" && $echo ': @PROGRAM@ ' > "$nlist"
+
+	    # Add our own program objects to the symbol list.
+	    progfiles=`$echo "X$objs$old_deplibs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+	    for arg in $progfiles; do
+	      $show "extracting global C symbols from \`$arg'"
+	      $run eval "$NM $arg | $global_symbol_pipe >> '$nlist'"
+	    done
+
+	    if test -n "$exclude_expsyms"; then
+	      $run eval 'egrep -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T'
+	      $run eval '$mv "$nlist"T "$nlist"'
+	    fi
+
+	    if test -n "$export_symbols_regex"; then
+	      $run eval 'egrep -e "$export_symbols_regex" "$nlist" > "$nlist"T'
+	      $run eval '$mv "$nlist"T "$nlist"'
+	    fi
+
+	    # Prepare the list of exported symbols
+	    if test -z "$export_symbols"; then
+	      export_symbols="$output_objdir/$output.exp"
+	      $run $rm $export_symbols
+	      $run eval "${SED} -n -e '/^: @PROGRAM@$/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"'
+	    else
+	      $run eval "${SED} -e 's/\([][.*^$]\)/\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$output.exp"'
+	      $run eval 'grep -f "$output_objdir/$output.exp" < "$nlist" > "$nlist"T'
+	      $run eval 'mv "$nlist"T "$nlist"'
+	    fi
+	  fi
+
+	  for arg in $dlprefiles; do
+	    $show "extracting global C symbols from \`$arg'"
+	    name=`echo "$arg" | ${SED} -e 's%^.*/%%'`
+	    $run eval 'echo ": $name " >> "$nlist"'
+	    $run eval "$NM $arg | $global_symbol_pipe >> '$nlist'"
+	  done
+
+	  if test -z "$run"; then
+	    # Make sure we have at least an empty file.
+	    test -f "$nlist" || : > "$nlist"
+
+	    if test -n "$exclude_expsyms"; then
+	      egrep -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T
+	      $mv "$nlist"T "$nlist"
+	    fi
+
+	    # Try sorting and uniquifying the output.
+	    if grep -v "^: " < "$nlist" |
+		if sort -k 3 </dev/null >/dev/null 2>&1; then
+		  sort -k 3
+		else
+		  sort +2
+		fi |
+		uniq > "$nlist"S; then
+	      :
+	    else
+	      grep -v "^: " < "$nlist" > "$nlist"S
+	    fi
+
+	    if test -f "$nlist"S; then
+	      eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$dlsyms"'
+	    else
+	      echo '/* NONE */' >> "$output_objdir/$dlsyms"
+	    fi
+
+	    $echo >> "$output_objdir/$dlsyms" "\
+
+#undef lt_preloaded_symbols
+
+#if defined (__STDC__) && __STDC__
+# define lt_ptr void *
+#else
+# define lt_ptr char *
+# define const
+#endif
+
+/* The mapping between symbol names and symbols. */
+const struct {
+  const char *name;
+  lt_ptr address;
+}
+lt_preloaded_symbols[] =
+{\
+"
+
+	    eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$dlsyms"
+
+	    $echo >> "$output_objdir/$dlsyms" "\
+  {0, (lt_ptr) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif\
+"
+	  fi
+
+	  pic_flag_for_symtable=
+	  case $host in
+	  # compiling the symbol table file with pic_flag works around
+	  # a FreeBSD bug that causes programs to crash when -lm is
+	  # linked before any other PIC object.  But we must not use
+	  # pic_flag when linking with -static.  The problem exists in
+	  # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1.
+	  *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*)
+	    case "$compile_command " in
+	    *" -static "*) ;;
+	    *) pic_flag_for_symtable=" $pic_flag -DPIC -DFREEBSD_WORKAROUND";;
+	    esac;;
+	  *-*-hpux*)
+	    case "$compile_command " in
+	    *" -static "*) ;;
+	    *) pic_flag_for_symtable=" $pic_flag -DPIC";;
+	    esac
+	  esac
+
+	  # Now compile the dynamic symbol file.
+	  $show "(cd $output_objdir && $CC -c$no_builtin_flag$pic_flag_for_symtable \"$dlsyms\")"
+	  $run eval '(cd $output_objdir && $CC -c$no_builtin_flag$pic_flag_for_symtable "$dlsyms")' || exit $?
+
+	  # Clean up the generated files.
+	  $show "$rm $output_objdir/$dlsyms $nlist ${nlist}S ${nlist}T"
+	  $run $rm "$output_objdir/$dlsyms" "$nlist" "${nlist}S" "${nlist}T"
+
+	  # Transform the symbol file into the correct name.
+	  compile_command=`$echo "X$compile_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/${outputname}S.${objext}%"`
+	  finalize_command=`$echo "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/${outputname}S.${objext}%"`
+	  ;;
+	*)
+	  $echo "$modename: unknown suffix for \`$dlsyms'" 1>&2
+	  exit 1
+	  ;;
+	esac
+      else
+	# We keep going just in case the user didn't refer to
+	# lt_preloaded_symbols.  The linker will fail if global_symbol_pipe
+	# really was required.
+
+	# Nullify the symbol file.
+	compile_command=`$echo "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"`
+	finalize_command=`$echo "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"`
+      fi
+
+      if test $need_relink = no || test "$build_libtool_libs" != yes; then
+	# Replace the output file specification.
+	compile_command=`$echo "X$compile_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
+	link_command="$compile_command$compile_rpath"
+
+	# We have no uninstalled library dependencies, so finalize right now.
+	$show "$link_command"
+	$run eval "$link_command"
+	status=$?
+
+	# Delete the generated files.
+	if test -n "$dlsyms"; then
+	  $show "$rm $output_objdir/${outputname}S.${objext}"
+	  $run $rm "$output_objdir/${outputname}S.${objext}"
+	fi
+
+	exit $status
+      fi
+
+      if test -n "$shlibpath_var"; then
+	# We should set the shlibpath_var
+	rpath=
+	for dir in $temp_rpath; do
+	  case $dir in
+	  [\\/]* | [A-Za-z]:[\\/]*)
+	    # Absolute path.
+	    rpath="$rpath$dir:"
+	    ;;
+	  *)
+	    # Relative path: add a thisdir entry.
+	    rpath="$rpath\$thisdir/$dir:"
+	    ;;
+	  esac
+	done
+	temp_rpath="$rpath"
+      fi
+
+      if test -n "$compile_shlibpath$finalize_shlibpath"; then
+	compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command"
+      fi
+      if test -n "$finalize_shlibpath"; then
+	finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command"
+      fi
+
+      compile_var=
+      finalize_var=
+      if test -n "$runpath_var"; then
+	if test -n "$perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $perm_rpath; do
+	    rpath="$rpath$dir:"
+	  done
+	  compile_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+	if test -n "$finalize_perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $finalize_perm_rpath; do
+	    rpath="$rpath$dir:"
+	  done
+	  finalize_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+      fi
+
+      if test "$no_install" = yes; then
+	# We don't need to create a wrapper script.
+	link_command="$compile_var$compile_command$compile_rpath"
+	# Replace the output file specification.
+	link_command=`$echo "X$link_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
+	# Delete the old output file.
+	$run $rm $output
+	# Link the executable and exit
+	$show "$link_command"
+	$run eval "$link_command" || exit $?
+	exit 0
+      fi
+
+      if test "$hardcode_action" = relink; then
+	# Fast installation is not supported
+	link_command="$compile_var$compile_command$compile_rpath"
+	relink_command="$finalize_var$finalize_command$finalize_rpath"
+
+	$echo "$modename: warning: this platform does not like uninstalled shared libraries" 1>&2
+	$echo "$modename: \`$output' will be relinked during installation" 1>&2
+      else
+	if test "$fast_install" != no; then
+	  link_command="$finalize_var$compile_command$finalize_rpath"
+	  if test "$fast_install" = yes; then
+	    relink_command=`$echo "X$compile_var$compile_command$compile_rpath" | $Xsed -e 's%@OUTPUT@%\$progdir/\$file%g'`
+	  else
+	    # fast_install is set to needless
+	    relink_command=
+	  fi
+	else
+	  link_command="$compile_var$compile_command$compile_rpath"
+	  relink_command="$finalize_var$finalize_command$finalize_rpath"
+	fi
+      fi
+
+      # Replace the output file specification.
+      link_command=`$echo "X$link_command" | $Xsed -e 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'`
+
+      # Delete the old output files.
+      $run $rm $output $output_objdir/$outputname $output_objdir/lt-$outputname
+
+      $show "$link_command"
+      $run eval "$link_command" || exit $?
+
+      # Now create the wrapper script.
+      $show "creating $output"
+
+      # Quote the relink command for shipping.
+      if test -n "$relink_command"; then
+	# Preserve any variables that may affect compiler behavior
+	for var in $variables_saved_for_relink; do
+	  if eval test -z \"\${$var+set}\"; then
+	    relink_command="{ test -z \"\${$var+set}\" || unset $var || { $var=; export $var; }; }; $relink_command"
+	  elif eval var_value=\$$var; test -z "$var_value"; then
+	    relink_command="$var=; export $var; $relink_command"
+	  else
+	    var_value=`$echo "X$var_value" | $Xsed -e "$sed_quote_subst"`
+	    relink_command="$var=\"$var_value\"; export $var; $relink_command"
+	  fi
+	done
+	relink_command="(cd `pwd`; $relink_command)"
+	relink_command=`$echo "X$relink_command" | $Xsed -e "$sed_quote_subst"`
+      fi
+
+      # Quote $echo for shipping.
+      if test "X$echo" = "X$SHELL $0 --fallback-echo"; then
+	case $0 in
+	[\\/]* | [A-Za-z]:[\\/]*) qecho="$SHELL $0 --fallback-echo";;
+	*) qecho="$SHELL `pwd`/$0 --fallback-echo";;
+	esac
+	qecho=`$echo "X$qecho" | $Xsed -e "$sed_quote_subst"`
+      else
+	qecho=`$echo "X$echo" | $Xsed -e "$sed_quote_subst"`
+      fi
+
+      # Only actually do things if our run command is non-null.
+      if test -z "$run"; then
+	# win32 will think the script is a binary if it has
+	# a .exe suffix, so we strip it off here.
+	case $output in
+	  *.exe) output=`echo $output|${SED} 's,.exe$,,'` ;;
+	esac
+	# test for cygwin because mv fails w/o .exe extensions
+	case $host in
+	  *cygwin*) exeext=.exe ;;
+	  *) exeext= ;;
+	esac
+	$rm $output
+	trap "$rm $output; exit 1" 1 2 15
+
+	$echo > $output "\
+#! $SHELL
+
+# $output - temporary wrapper script for $objdir/$outputname
+# Generated by $PROGRAM - GNU $PACKAGE $VERSION$TIMESTAMP
+#
+# The $output program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+Xsed="${SED}"' -e 1s/^X//'
+sed_quote_subst='$sed_quote_subst'
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+if test \"\${CDPATH+set}\" = set; then CDPATH=:; export CDPATH; fi
+
+relink_command=\"$relink_command\"
+
+# This environment variable determines our operation mode.
+if test \"\$libtool_install_magic\" = \"$magic\"; then
+  # install mode needs the following variable:
+  notinst_deplibs='$notinst_deplibs'
+else
+  # When we are sourced in execute mode, \$file and \$echo are already set.
+  if test \"\$libtool_execute_magic\" != \"$magic\"; then
+    echo=\"$qecho\"
+    file=\"\$0\"
+    # Make sure echo works.
+    if test \"X\$1\" = X--no-reexec; then
+      # Discard the --no-reexec flag, and continue.
+      shift
+    elif test \"X\`(\$echo '\t') 2>/dev/null\`\" = 'X\t'; then
+      # Yippee, \$echo works!
+      :
+    else
+      # Restart under the correct shell, and then maybe \$echo will work.
+      exec $SHELL \"\$0\" --no-reexec \${1+\"\$@\"}
+    fi
+  fi\
+"
+	$echo >> $output "\
+
+  # Find the directory that this script lives in.
+  thisdir=\`\$echo \"X\$file\" | \$Xsed -e 's%/[^/]*$%%'\`
+  test \"x\$thisdir\" = \"x\$file\" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=\`ls -ld \"\$file\" | ${SED} -n 's/.*-> //p'\`
+  while test -n \"\$file\"; do
+    destdir=\`\$echo \"X\$file\" | \$Xsed -e 's%/[^/]*\$%%'\`
+
+    # If there was a directory component, then change thisdir.
+    if test \"x\$destdir\" != \"x\$file\"; then
+      case \"\$destdir\" in
+      [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;;
+      *) thisdir=\"\$thisdir/\$destdir\" ;;
+      esac
+    fi
+
+    file=\`\$echo \"X\$file\" | \$Xsed -e 's%^.*/%%'\`
+    file=\`ls -ld \"\$thisdir/\$file\" | ${SED} -n 's/.*-> //p'\`
+  done
+
+  # Try to get the absolute directory name.
+  absdir=\`cd \"\$thisdir\" && pwd\`
+  test -n \"\$absdir\" && thisdir=\"\$absdir\"
+"
+
+	if test "$fast_install" = yes; then
+	  echo >> $output "\
+  program=lt-'$outputname'$exeext
+  progdir=\"\$thisdir/$objdir\"
+
+  if test ! -f \"\$progdir/\$program\" || \\
+     { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | ${SED} 1q\`; \\
+       test \"X\$file\" != \"X\$progdir/\$program\"; }; then
+
+    file=\"\$\$-\$program\"
+
+    if test ! -d \"\$progdir\"; then
+      $mkdir \"\$progdir\"
+    else
+      $rm \"\$progdir/\$file\"
+    fi"
+
+	  echo >> $output "\
+
+    # relink executable if necessary
+    if test -n \"\$relink_command\"; then
+      if relink_command_output=\`eval \$relink_command 2>&1\`; then :
+      else
+	$echo \"\$relink_command_output\" >&2
+	$rm \"\$progdir/\$file\"
+	exit 1
+      fi
+    fi
+
+    $mv \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null ||
+    { $rm \"\$progdir/\$program\";
+      $mv \"\$progdir/\$file\" \"\$progdir/\$program\"; }
+    $rm \"\$progdir/\$file\"
+  fi"
+	else
+	  echo >> $output "\
+  program='$outputname'
+  progdir=\"\$thisdir/$objdir\"
+"
+	fi
+
+	echo >> $output "\
+
+  if test -f \"\$progdir/\$program\"; then"
+
+	# Export our shlibpath_var if we have one.
+	if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then
+	  $echo >> $output "\
+    # Add our own library path to $shlibpath_var
+    $shlibpath_var=\"$temp_rpath\$$shlibpath_var\"
+
+    # Some systems cannot cope with colon-terminated $shlibpath_var
+    # The second colon is a workaround for a bug in BeOS R4 ${SED}
+    $shlibpath_var=\`\$echo \"X\$$shlibpath_var\" | \$Xsed -e 's/::*\$//'\`
+
+    export $shlibpath_var
+"
+	fi
+
+	# fixup the dll searchpath if we need to.
+	if test -n "$dllsearchpath"; then
+	  $echo >> $output "\
+    # Add the dll search path components to the executable PATH
+    PATH=$dllsearchpath:\$PATH
+"
+	fi
+
+	$echo >> $output "\
+    if test \"\$libtool_execute_magic\" != \"$magic\"; then
+      # Run the actual program with our arguments.
+"
+	case $host in
+	# win32 systems need to use the prog path for dll
+	# lookup to work
+	*-*-cygwin* | *-*-pw32*)
+	  $echo >> $output "\
+      exec \$progdir/\$program \${1+\"\$@\"}
+"
+	  ;;
+
+	# Backslashes separate directories on plain windows
+	*-*-mingw | *-*-os2*)
+	  $echo >> $output "\
+      exec \$progdir\\\\\$program \${1+\"\$@\"}
+"
+	  ;;
+
+	*)
+	  $echo >> $output "\
+      # Export the path to the program.
+      PATH=\"\$progdir:\$PATH\"
+      export PATH
+
+      exec \$program \${1+\"\$@\"}
+"
+	  ;;
+	esac
+	$echo >> $output "\
+      \$echo \"\$0: cannot exec \$program \${1+\"\$@\"}\"
+      exit 1
+    fi
+  else
+    # The program doesn't exist.
+    \$echo \"\$0: error: \$progdir/\$program does not exist\" 1>&2
+    \$echo \"This script is just a wrapper for \$program.\" 1>&2
+    echo \"See the $PACKAGE documentation for more information.\" 1>&2
+    exit 1
+  fi
+fi\
+"
+	chmod +x $output
+      fi
+      exit 0
+      ;;
+    esac
+
+    # See if we need to build an old-fashioned archive.
+    for oldlib in $oldlibs; do
+
+      if test "$build_libtool_libs" = convenience; then
+	oldobjs="$libobjs_save"
+	addlibs="$convenience"
+	build_libtool_libs=no
+      else
+	if test "$build_libtool_libs" = module; then
+	  oldobjs="$libobjs_save"
+	  build_libtool_libs=no
+	else
+	  oldobjs="$objs$old_deplibs "`$echo "X$libobjs_save" | $SP2NL | $Xsed -e '/\.'${libext}'$/d' -e '/\.lib$/d' -e "$lo2o" | $NL2SP`
+	fi
+	addlibs="$old_convenience"
+      fi
+
+      if test -n "$addlibs"; then
+	gentop="$output_objdir/${outputname}x"
+	$show "${rm}r $gentop"
+	$run ${rm}r "$gentop"
+	$show "mkdir $gentop"
+	$run mkdir "$gentop"
+	status=$?
+	if test $status -ne 0 && test ! -d "$gentop"; then
+	  exit $status
+	fi
+	generated="$generated $gentop"
+
+	# Add in members from convenience archives.
+	for xlib in $addlibs; do
+	  # Extract the objects.
+	  case $xlib in
+	  [\\/]* | [A-Za-z]:[\\/]*) xabs="$xlib" ;;
+	  *) xabs=`pwd`"/$xlib" ;;
+	  esac
+	  xlib=`$echo "X$xlib" | $Xsed -e 's%^.*/%%'`
+	  xdir="$gentop/$xlib"
+
+	  $show "${rm}r $xdir"
+	  $run ${rm}r "$xdir"
+	  $show "mkdir $xdir"
+	  $run mkdir "$xdir"
+	  status=$?
+	  if test $status -ne 0 && test ! -d "$xdir"; then
+	    exit $status
+	  fi
+	  $show "(cd $xdir && $AR x $xabs)"
+	  $run eval "(cd \$xdir && $AR x \$xabs)" || exit $?
+
+	  oldobjs="$oldobjs "`find $xdir -name \*.${objext} -print -o -name \*.lo -print | $NL2SP`
+	done
+      fi
+
+      # Do each command in the archive commands.
+      if test -n "$old_archive_from_new_cmds" && test "$build_libtool_libs" = yes; then
+	eval cmds=\"$old_archive_from_new_cmds\"
+      else
+	# Ensure that we have .o objects in place in case we decided
+	# not to build a shared library, and have fallen back to building
+	# static libs even though --disable-static was passed!
+	for oldobj in $oldobjs; do
+	  if test ! -f $oldobj; then
+	    xdir=`$echo "X$oldobj" | $Xsed -e 's%/[^/]*$%%'`
+	    if test "X$xdir" = "X$oldobj"; then
+	      xdir="."
+	    else
+	      xdir="$xdir"
+	    fi
+	    baseobj=`$echo "X$oldobj" | $Xsed -e 's%^.*/%%'`
+	    obj=`$echo "X$baseobj" | $Xsed -e "$o2lo"`
+	    $show "(cd $xdir && ${LN_S} $obj $baseobj)"
+	    $run eval '(cd $xdir && ${LN_S} $obj $baseobj)' || exit $?
+	  fi
+	done
+
+	eval cmds=\"$old_archive_cmds\"
+      fi
+      save_ifs="$IFS"; IFS='~'
+      for cmd in $cmds; do
+	IFS="$save_ifs"
+	$show "$cmd"
+	$run eval "$cmd" || exit $?
+      done
+      IFS="$save_ifs"
+    done
+
+    if test -n "$generated"; then
+      $show "${rm}r$generated"
+      $run ${rm}r$generated
+    fi
+
+    # Now create the libtool archive.
+    case $output in
+    *.la)
+      old_library=
+      test "$build_old_libs" = yes && old_library="$libname.$libext"
+      $show "creating $output"
+
+      # Preserve any variables that may affect compiler behavior
+      for var in $variables_saved_for_relink; do
+	if eval test -z \"\${$var+set}\"; then
+	  relink_command="{ test -z \"\${$var+set}\" || unset $var || { $var=; export $var; }; }; $relink_command"
+	elif eval var_value=\$$var; test -z "$var_value"; then
+	  relink_command="$var=; export $var; $relink_command"
+	else
+	  var_value=`$echo "X$var_value" | $Xsed -e "$sed_quote_subst"`
+	  relink_command="$var=\"$var_value\"; export $var; $relink_command"
+	fi
+      done
+      # Quote the link command for shipping.
+      relink_command="(cd `pwd`; $SHELL $0 --mode=relink $libtool_args)"
+      relink_command=`$echo "X$relink_command" | $Xsed -e "$sed_quote_subst"`
+
+      # Only create the output if not a dry run.
+      if test -z "$run"; then
+	for installed in no yes; do
+	  if test "$installed" = yes; then
+	    if test -z "$install_libdir"; then
+	      break
+	    fi
+	    output="$output_objdir/$outputname"i
+	    # Replace all uninstalled libtool libraries with the installed ones
+	    newdependency_libs=
+	    for deplib in $dependency_libs; do
+	      case $deplib in
+	      *.la)
+		name=`$echo "X$deplib" | $Xsed -e 's%^.*/%%'`
+		eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib`
+		if test -z "$libdir"; then
+		  $echo "$modename: \`$deplib' is not a valid libtool archive" 1>&2
+		  exit 1
+		fi
+		newdependency_libs="$newdependency_libs $libdir/$name"
+		;;
+	      *) newdependency_libs="$newdependency_libs $deplib" ;;
+	      esac
+	    done
+	    dependency_libs="$newdependency_libs"
+	    newdlfiles=
+	    for lib in $dlfiles; do
+	      name=`$echo "X$lib" | $Xsed -e 's%^.*/%%'`
+	      eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+	      if test -z "$libdir"; then
+		$echo "$modename: \`$lib' is not a valid libtool archive" 1>&2
+		exit 1
+	      fi
+	      newdlfiles="$newdlfiles $libdir/$name"
+	    done
+	    dlfiles="$newdlfiles"
+	    newdlprefiles=
+	    for lib in $dlprefiles; do
+	      name=`$echo "X$lib" | $Xsed -e 's%^.*/%%'`
+	      eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+	      if test -z "$libdir"; then
+		$echo "$modename: \`$lib' is not a valid libtool archive" 1>&2
+		exit 1
+	      fi
+	      newdlprefiles="$newdlprefiles $libdir/$name"
+	    done
+	    dlprefiles="$newdlprefiles"
+	  fi
+	  $rm $output
+	  # place dlname in correct position for cygwin
+	  tdlname=$dlname
+	  case $host,$output,$installed,$module,$dlname in
+	    *cygwin*,*lai,yes,no,*.dll) tdlname=../bin/$dlname ;;
+	  esac
+	  $echo > $output "\
+# $outputname - a libtool library file
+# Generated by $PROGRAM - GNU $PACKAGE $VERSION$TIMESTAMP
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# The name that we can dlopen(3).
+dlname='$tdlname'
+
+# Names of this library.
+library_names='$library_names'
+
+# The name of the static archive.
+old_library='$old_library'
+
+# Libraries that this one depends upon.
+dependency_libs='$dependency_libs'
+
+# Version information for $libname.
+current=$current
+age=$age
+revision=$revision
+
+# Is this an already installed library?
+installed=$installed
+
+# Files to dlopen/dlpreopen
+dlopen='$dlfiles'
+dlpreopen='$dlprefiles'
+
+# Directory that this library needs to be installed in:
+libdir='$install_libdir'"
+	  if test "$installed" = no && test $need_relink = yes; then
+	    $echo >> $output "\
+relink_command=\"$relink_command\""
+	  fi
+	done
+      fi
+
+      # Do a symbolic link so that the libtool archive can be found in
+      # LD_LIBRARY_PATH before the program is installed.
+      $show "(cd $output_objdir && $rm $outputname && $LN_S ../$outputname $outputname)"
+      $run eval '(cd $output_objdir && $rm $outputname && $LN_S ../$outputname $outputname)' || exit $?
+      ;;
+    esac
+    exit 0
+    ;;
+
+  # libtool install mode
+  install)
+    modename="$modename: install"
+
+    # There may be an optional sh(1) argument at the beginning of
+    # install_prog (especially on Windows NT).
+    if test "$nonopt" = "$SHELL" || test "$nonopt" = /bin/sh ||
+       # Allow the use of GNU shtool's install command.
+       $echo "X$nonopt" | $Xsed | grep shtool > /dev/null; then
+      # Aesthetically quote it.
+      arg=`$echo "X$nonopt" | $Xsed -e "$sed_quote_subst"`
+      case $arg in
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*)
+	arg="\"$arg\""
+	;;
+      esac
+      install_prog="$arg "
+      arg="$1"
+      shift
+    else
+      install_prog=
+      arg="$nonopt"
+    fi
+
+    # The real first argument should be the name of the installation program.
+    # Aesthetically quote it.
+    arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
+    case $arg in
+    *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*)
+      arg="\"$arg\""
+      ;;
+    esac
+    install_prog="$install_prog$arg"
+
+    # We need to accept at least all the BSD install flags.
+    dest=
+    files=
+    opts=
+    prev=
+    install_type=
+    isdir=no
+    stripme=
+    for arg
+    do
+      if test -n "$dest"; then
+	files="$files $dest"
+	dest="$arg"
+	continue
+      fi
+
+      case $arg in
+      -d) isdir=yes ;;
+      -f) prev="-f" ;;
+      -g) prev="-g" ;;
+      -m) prev="-m" ;;
+      -o) prev="-o" ;;
+      -s)
+	stripme=" -s"
+	continue
+	;;
+      -*) ;;
+
+      *)
+	# If the previous option needed an argument, then skip it.
+	if test -n "$prev"; then
+	  prev=
+	else
+	  dest="$arg"
+	  continue
+	fi
+	;;
+      esac
+
+      # Aesthetically quote the argument.
+      arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
+      case $arg in
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*)
+	arg="\"$arg\""
+	;;
+      esac
+      install_prog="$install_prog $arg"
+    done
+
+    if test -z "$install_prog"; then
+      $echo "$modename: you must specify an install program" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    if test -n "$prev"; then
+      $echo "$modename: the \`$prev' option requires an argument" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    if test -z "$files"; then
+      if test -z "$dest"; then
+	$echo "$modename: no file or destination specified" 1>&2
+      else
+	$echo "$modename: you must specify a destination" 1>&2
+      fi
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    # Strip any trailing slash from the destination.
+    dest=`$echo "X$dest" | $Xsed -e 's%/$%%'`
+
+    # Check to see that the destination is a directory.
+    test -d "$dest" && isdir=yes
+    if test "$isdir" = yes; then
+      destdir="$dest"
+      destname=
+    else
+      destdir=`$echo "X$dest" | $Xsed -e 's%/[^/]*$%%'`
+      test "X$destdir" = "X$dest" && destdir=.
+      destname=`$echo "X$dest" | $Xsed -e 's%^.*/%%'`
+
+      # Not a directory, so check to see that there is only one file specified.
+      set dummy $files
+      if test $# -gt 2; then
+	$echo "$modename: \`$dest' is not a directory" 1>&2
+	$echo "$help" 1>&2
+	exit 1
+      fi
+    fi
+    case $destdir in
+    [\\/]* | [A-Za-z]:[\\/]*) ;;
+    *)
+      for file in $files; do
+	case $file in
+	*.lo) ;;
+	*)
+	  $echo "$modename: \`$destdir' must be an absolute directory name" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	  ;;
+	esac
+      done
+      ;;
+    esac
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic="$magic"
+
+    staticlibs=
+    future_libdirs=
+    current_libdirs=
+    for file in $files; do
+
+      # Do each installation.
+      case $file in
+      *.$libext)
+	# Do the static libraries later.
+	staticlibs="$staticlibs $file"
+	;;
+
+      *.la)
+	# Check to see that this really is a libtool archive.
+	if (${SED} -e '2q' $file | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then :
+	else
+	  $echo "$modename: \`$file' is not a valid libtool archive" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	fi
+
+	library_names=
+	old_library=
+	relink_command=
+	# If there is no directory component, then add one.
+	case $file in
+	*/* | *\\*) . $file ;;
+	*) . ./$file ;;
+	esac
+
+	# Add the libdir to current_libdirs if it is the destination.
+	if test "X$destdir" = "X$libdir"; then
+	  case "$current_libdirs " in
+	  *" $libdir "*) ;;
+	  *) current_libdirs="$current_libdirs $libdir" ;;
+	  esac
+	else
+	  # Note the libdir as a future libdir.
+	  case "$future_libdirs " in
+	  *" $libdir "*) ;;
+	  *) future_libdirs="$future_libdirs $libdir" ;;
+	  esac
+	fi
+
+	dir=`$echo "X$file" | $Xsed -e 's%/[^/]*$%%'`/
+	test "X$dir" = "X$file/" && dir=
+	dir="$dir$objdir"
+
+	if test -n "$relink_command"; then
+	  $echo "$modename: warning: relinking \`$file'" 1>&2
+	  $show "$relink_command"
+	  if $run eval "$relink_command"; then :
+	  else
+	    $echo "$modename: error: relink \`$file' with the above command before installing it" 1>&2
+	    continue
+	  fi
+	fi
+
+	# See the names of the shared library.
+	set dummy $library_names
+	if test -n "$2"; then
+	  realname="$2"
+	  shift
+	  shift
+
+	  srcname="$realname"
+	  test -n "$relink_command" && srcname="$realname"T
+
+	  # Install the shared library and build the symlinks.
+	  $show "$install_prog $dir/$srcname $destdir/$realname"
+	  $run eval "$install_prog $dir/$srcname $destdir/$realname" || exit $?
+	  if test -n "$stripme" && test -n "$striplib"; then
+	    $show "$striplib $destdir/$realname"
+	    $run eval "$striplib $destdir/$realname" || exit $?
+	  fi
+
+	  if test $# -gt 0; then
+	    # Delete the old symlinks, and create new ones.
+	    for linkname
+	    do
+	      if test "$linkname" != "$realname"; then
+		$show "(cd $destdir && $rm $linkname && $LN_S $realname $linkname)"
+		$run eval "(cd $destdir && $rm $linkname && $LN_S $realname $linkname)"
+	      fi
+	    done
+	  fi
+
+	  # Do each command in the postinstall commands.
+	  lib="$destdir/$realname"
+	  eval cmds=\"$postinstall_cmds\"
+	  save_ifs="$IFS"; IFS='~'
+	  for cmd in $cmds; do
+	    IFS="$save_ifs"
+	    $show "$cmd"
+	    $run eval "$cmd" || exit $?
+	  done
+	  IFS="$save_ifs"
+	fi
+
+	# Install the pseudo-library for information purposes.
+	name=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+	instname="$dir/$name"i
+	$show "$install_prog $instname $destdir/$name"
+	$run eval "$install_prog $instname $destdir/$name" || exit $?
+
+	# Maybe install the static library, too.
+	test -n "$old_library" && staticlibs="$staticlibs $dir/$old_library"
+	;;
+
+      *.lo)
+	# Install (i.e. copy) a libtool object.
+
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile="$destdir/$destname"
+	else
+	  destfile=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+	  destfile="$destdir/$destfile"
+	fi
+
+	# Deduce the name of the destination old-style object file.
+	case $destfile in
+	*.lo)
+	  staticdest=`$echo "X$destfile" | $Xsed -e "$lo2o"`
+	  ;;
+	*.$objext)
+	  staticdest="$destfile"
+	  destfile=
+	  ;;
+	*)
+	  $echo "$modename: cannot copy a libtool object to \`$destfile'" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	  ;;
+	esac
+
+	# Install the libtool object if requested.
+	if test -n "$destfile"; then
+	  $show "$install_prog $file $destfile"
+	  $run eval "$install_prog $file $destfile" || exit $?
+	fi
+
+	# Install the old object if enabled.
+	if test "$build_old_libs" = yes; then
+	  # Deduce the name of the old-style object file.
+	  staticobj=`$echo "X$file" | $Xsed -e "$lo2o"`
+
+	  $show "$install_prog $staticobj $staticdest"
+	  $run eval "$install_prog \$staticobj \$staticdest" || exit $?
+	fi
+	exit 0
+	;;
+
+      *)
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile="$destdir/$destname"
+	else
+	  destfile=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+	  destfile="$destdir/$destfile"
+	fi
+
+	# Do a test to see if this is really a libtool program.
+	case $host in
+	*cygwin*|*mingw*)
+	    wrapper=`echo $file | ${SED} -e 's,.exe$,,'`
+	    ;;
+	*)
+	    wrapper=$file
+	    ;;
+	esac
+	if (${SED} -e '4q' $wrapper | egrep "^# Generated by .*$PACKAGE")>/dev/null 2>&1; then
+	  notinst_deplibs=
+	  relink_command=
+
+	  # If there is no directory component, then add one.
+	  case $file in
+	  */* | *\\*) . $wrapper ;;
+	  *) . ./$wrapper ;;
+	  esac
+
+	  # Check the variables that should have been set.
+	  if test -z "$notinst_deplibs"; then
+	    $echo "$modename: invalid libtool wrapper script \`$wrapper'" 1>&2
+	    exit 1
+	  fi
+
+	  finalize=yes
+	  for lib in $notinst_deplibs; do
+	    # Check to see that each library is installed.
+	    libdir=
+	    if test -f "$lib"; then
+	      # If there is no directory component, then add one.
+	      case $lib in
+	      */* | *\\*) . $lib ;;
+	      *) . ./$lib ;;
+	      esac
+	    fi
+	    libfile="$libdir/"`$echo "X$lib" | $Xsed -e 's%^.*/%%g'` ### testsuite: skip nested quoting test
+	    if test -n "$libdir" && test ! -f "$libfile"; then
+	      $echo "$modename: warning: \`$lib' has not been installed in \`$libdir'" 1>&2
+	      finalize=no
+	    fi
+	  done
+
+	  relink_command=
+	  # If there is no directory component, then add one.
+	  case $file in
+	  */* | *\\*) . $wrapper ;;
+	  *) . ./$wrapper ;;
+	  esac
+
+	  outputname=
+	  if test "$fast_install" = no && test -n "$relink_command"; then
+	    if test "$finalize" = yes && test -z "$run"; then
+	      tmpdir="/tmp"
+	      test -n "$TMPDIR" && tmpdir="$TMPDIR"
+	      tmpdir="$tmpdir/libtool-$$"
+	      if $mkdir -p "$tmpdir" && chmod 700 "$tmpdir"; then :
+	      else
+		$echo "$modename: error: cannot create temporary directory \`$tmpdir'" 1>&2
+		continue
+	      fi
+	      file=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+	      outputname="$tmpdir/$file"
+	      # Replace the output file specification.
+	      relink_command=`$echo "X$relink_command" | $Xsed -e 's%@OUTPUT@%'"$outputname"'%g'`
+
+	      $show "$relink_command"
+	      if $run eval "$relink_command"; then :
+	      else
+		$echo "$modename: error: relink \`$file' with the above command before installing it" 1>&2
+		${rm}r "$tmpdir"
+		continue
+	      fi
+	      file="$outputname"
+	    else
+	      $echo "$modename: warning: cannot relink \`$file'" 1>&2
+	    fi
+	  else
+	    # Install the binary that we compiled earlier.
+	    file=`$echo "X$file" | $Xsed -e "s%\([^/]*\)$%$objdir/\1%"`
+	  fi
+	fi
+
+	# remove .exe since cygwin /usr/bin/install will append another
+	# one anyways
+	case $install_prog,$host in
+	/usr/bin/install*,*cygwin*)
+	  case $file:$destfile in
+	  *.exe:*.exe)
+	    # this is ok
+	    ;;
+	  *.exe:*)
+	    destfile=$destfile.exe
+	    ;;
+	  *:*.exe)
+	    destfile=`echo $destfile | ${SED} -e 's,.exe$,,'`
+	    ;;
+	  esac
+	  ;;
+	esac
+	$show "$install_prog$stripme $file $destfile"
+	$run eval "$install_prog\$stripme \$file \$destfile" || exit $?
+	test -n "$outputname" && ${rm}r "$tmpdir"
+	;;
+      esac
+    done
+
+    for file in $staticlibs; do
+      name=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+
+      # Set up the ranlib parameters.
+      oldlib="$destdir/$name"
+
+      $show "$install_prog $file $oldlib"
+      $run eval "$install_prog \$file \$oldlib" || exit $?
+
+      if test -n "$stripme" && test -n "$striplib"; then
+	$show "$old_striplib $oldlib"
+	$run eval "$old_striplib $oldlib" || exit $?
+      fi
+
+      # Do each command in the postinstall commands.
+      eval cmds=\"$old_postinstall_cmds\"
+      save_ifs="$IFS"; IFS='~'
+      for cmd in $cmds; do
+	IFS="$save_ifs"
+	$show "$cmd"
+	$run eval "$cmd" || exit $?
+      done
+      IFS="$save_ifs"
+    done
+
+    if test -n "$future_libdirs"; then
+      $echo "$modename: warning: remember to run \`$progname --finish$future_libdirs'" 1>&2
+    fi
+
+    if test -n "$current_libdirs"; then
+      # Maybe just do a dry run.
+      test -n "$run" && current_libdirs=" -n$current_libdirs"
+      exec_cmd='$SHELL $0 --finish$current_libdirs'
+    else
+      exit 0
+    fi
+    ;;
+
+  # libtool finish mode
+  finish)
+    modename="$modename: finish"
+    libdirs="$nonopt"
+    admincmds=
+
+    if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then
+      for dir
+      do
+	libdirs="$libdirs $dir"
+      done
+
+      for libdir in $libdirs; do
+	if test -n "$finish_cmds"; then
+	  # Do each command in the finish commands.
+	  eval cmds=\"$finish_cmds\"
+	  save_ifs="$IFS"; IFS='~'
+	  for cmd in $cmds; do
+	    IFS="$save_ifs"
+	    $show "$cmd"
+	    $run eval "$cmd" || admincmds="$admincmds
+       $cmd"
+	  done
+	  IFS="$save_ifs"
+	fi
+	if test -n "$finish_eval"; then
+	  # Do the single finish_eval.
+	  eval cmds=\"$finish_eval\"
+	  $run eval "$cmds" || admincmds="$admincmds
+       $cmds"
+	fi
+      done
+    fi
+
+    # Exit here if they wanted silent mode.
+    test "$show" = ":" && exit 0
+
+    echo "----------------------------------------------------------------------"
+    echo "Libraries have been installed in:"
+    for libdir in $libdirs; do
+      echo "   $libdir"
+    done
+    echo
+    echo "If you ever happen to want to link against installed libraries"
+    echo "in a given directory, LIBDIR, you must either use libtool, and"
+    echo "specify the full pathname of the library, or use the \`-LLIBDIR'"
+    echo "flag during linking and do at least one of the following:"
+    if test -n "$shlibpath_var"; then
+      echo "   - add LIBDIR to the \`$shlibpath_var' environment variable"
+      echo "     during execution"
+    fi
+    if test -n "$runpath_var"; then
+      echo "   - add LIBDIR to the \`$runpath_var' environment variable"
+      echo "     during linking"
+    fi
+    if test -n "$hardcode_libdir_flag_spec"; then
+      libdir=LIBDIR
+      eval flag=\"$hardcode_libdir_flag_spec\"
+
+      echo "   - use the \`$flag' linker flag"
+    fi
+    if test -n "$admincmds"; then
+      echo "   - have your system administrator run these commands:$admincmds"
+    fi
+    if test -f /etc/ld.so.conf; then
+      echo "   - have your system administrator add LIBDIR to \`/etc/ld.so.conf'"
+    fi
+    echo
+    echo "See any operating system documentation about shared libraries for"
+    echo "more information, such as the ld(1) and ld.so(8) manual pages."
+    echo "----------------------------------------------------------------------"
+    exit 0
+    ;;
+
+  # libtool execute mode
+  execute)
+    modename="$modename: execute"
+
+    # The first argument is the command name.
+    cmd="$nonopt"
+    if test -z "$cmd"; then
+      $echo "$modename: you must specify a COMMAND" 1>&2
+      $echo "$help"
+      exit 1
+    fi
+
+    # Handle -dlopen flags immediately.
+    for file in $execute_dlfiles; do
+      if test ! -f "$file"; then
+	$echo "$modename: \`$file' is not a file" 1>&2
+	$echo "$help" 1>&2
+	exit 1
+      fi
+
+      dir=
+      case $file in
+      *.la)
+	# Check to see that this really is a libtool archive.
+	if (${SED} -e '2q' $file | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then :
+	else
+	  $echo "$modename: \`$lib' is not a valid libtool archive" 1>&2
+	  $echo "$help" 1>&2
+	  exit 1
+	fi
+
+	# Read the libtool library.
+	dlname=
+	library_names=
+
+	# If there is no directory component, then add one.
+	case $file in
+	*/* | *\\*) . $file ;;
+	*) . ./$file ;;
+	esac
+
+	# Skip this library if it cannot be dlopened.
+	if test -z "$dlname"; then
+	  # Warn if it was a shared library.
+	  test -n "$library_names" && $echo "$modename: warning: \`$file' was not linked with \`-export-dynamic'"
+	  continue
+	fi
+
+	dir=`$echo "X$file" | $Xsed -e 's%/[^/]*$%%'`
+	test "X$dir" = "X$file" && dir=.
+
+	if test -f "$dir/$objdir/$dlname"; then
+	  dir="$dir/$objdir"
+	else
+	  $echo "$modename: cannot find \`$dlname' in \`$dir' or \`$dir/$objdir'" 1>&2
+	  exit 1
+	fi
+	;;
+
+      *.lo)
+	# Just add the directory containing the .lo file.
+	dir=`$echo "X$file" | $Xsed -e 's%/[^/]*$%%'`
+	test "X$dir" = "X$file" && dir=.
+	;;
+
+      *)
+	$echo "$modename: warning \`-dlopen' is ignored for non-libtool libraries and objects" 1>&2
+	continue
+	;;
+      esac
+
+      # Get the absolute pathname.
+      absdir=`cd "$dir" && pwd`
+      test -n "$absdir" && dir="$absdir"
+
+      # Now add the directory to shlibpath_var.
+      if eval "test -z \"\$$shlibpath_var\""; then
+	eval "$shlibpath_var=\"\$dir\""
+      else
+	eval "$shlibpath_var=\"\$dir:\$$shlibpath_var\""
+      fi
+    done
+
+    # This variable tells wrapper scripts just to set shlibpath_var
+    # rather than running their programs.
+    libtool_execute_magic="$magic"
+
+    # Check if any of the arguments is a wrapper script.
+    args=
+    for file
+    do
+      case $file in
+      -*) ;;
+      *)
+	# Do a test to see if this is really a libtool program.
+	if (${SED} -e '4q' $file | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then
+	  # If there is no directory component, then add one.
+	  case $file in
+	  */* | *\\*) . $file ;;
+	  *) . ./$file ;;
+	  esac
+
+	  # Transform arg to wrapped name.
+	  file="$progdir/$program"
+	fi
+	;;
+      esac
+      # Quote arguments (to preserve shell metacharacters).
+      file=`$echo "X$file" | $Xsed -e "$sed_quote_subst"`
+      args="$args \"$file\""
+    done
+
+    if test -z "$run"; then
+      if test -n "$shlibpath_var"; then
+	# Export the shlibpath_var.
+	eval "export $shlibpath_var"
+      fi
+
+      # Restore saved enviroment variables
+      if test "${save_LC_ALL+set}" = set; then
+	LC_ALL="$save_LC_ALL"; export LC_ALL
+      fi
+      if test "${save_LANG+set}" = set; then
+	LANG="$save_LANG"; export LANG
+      fi
+
+      # Now prepare to actually exec the command.
+      exec_cmd="\$cmd$args"
+    else
+      # Display what would be done.
+      if test -n "$shlibpath_var"; then
+	eval "\$echo \"\$shlibpath_var=\$$shlibpath_var\""
+	$echo "export $shlibpath_var"
+      fi
+      $echo "$cmd$args"
+      exit 0
+    fi
+    ;;
+
+  # libtool clean and uninstall mode
+  clean | uninstall)
+    modename="$modename: $mode"
+    rm="$nonopt"
+    files=
+    rmforce=
+    exit_status=0
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic="$magic"
+
+    for arg
+    do
+      case $arg in
+      -f) rm="$rm $arg"; rmforce=yes ;;
+      -*) rm="$rm $arg" ;;
+      *) files="$files $arg" ;;
+      esac
+    done
+
+    if test -z "$rm"; then
+      $echo "$modename: you must specify an RM program" 1>&2
+      $echo "$help" 1>&2
+      exit 1
+    fi
+
+    rmdirs=
+
+    for file in $files; do
+      dir=`$echo "X$file" | $Xsed -e 's%/[^/]*$%%'`
+      if test "X$dir" = "X$file"; then
+	dir=.
+	objdir="$objdir"
+      else
+	objdir="$dir/$objdir"
+      fi
+      name=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
+      test $mode = uninstall && objdir="$dir"
+
+      # Remember objdir for removal later, being careful to avoid duplicates
+      if test $mode = clean; then
+	case " $rmdirs " in
+	  *" $objdir "*) ;;
+	  *) rmdirs="$rmdirs $objdir" ;;
+	esac
+      fi
+
+      # Don't error if the file doesn't exist and rm -f was used.
+      if (test -L "$file") >/dev/null 2>&1 \
+	|| (test -h "$file") >/dev/null 2>&1 \
+	|| test -f "$file"; then
+	:
+      elif test -d "$file"; then
+	exit_status=1
+	continue
+      elif test "$rmforce" = yes; then
+	continue
+      fi
+
+      rmfiles="$file"
+
+      case $name in
+      *.la)
+	# Possibly a libtool archive, so verify it.
+	if (${SED} -e '2q' $file | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then
+	  . $dir/$name
+
+	  # Delete the libtool libraries and symlinks.
+	  for n in $library_names; do
+	    rmfiles="$rmfiles $objdir/$n"
+	  done
+	  test -n "$old_library" && rmfiles="$rmfiles $objdir/$old_library"
+	  test $mode = clean && rmfiles="$rmfiles $objdir/$name $objdir/${name}i"
+
+	  if test $mode = uninstall; then
+	    if test -n "$library_names"; then
+	      # Do each command in the postuninstall commands.
+	      eval cmds=\"$postuninstall_cmds\"
+	      save_ifs="$IFS"; IFS='~'
+	      for cmd in $cmds; do
+		IFS="$save_ifs"
+		$show "$cmd"
+		$run eval "$cmd"
+		if test $? != 0 && test "$rmforce" != yes; then
+		  exit_status=1
+		fi
+	      done
+	      IFS="$save_ifs"
+	    fi
+
+	    if test -n "$old_library"; then
+	      # Do each command in the old_postuninstall commands.
+	      eval cmds=\"$old_postuninstall_cmds\"
+	      save_ifs="$IFS"; IFS='~'
+	      for cmd in $cmds; do
+		IFS="$save_ifs"
+		$show "$cmd"
+		$run eval "$cmd"
+		if test $? != 0 && test "$rmforce" != yes; then
+		  exit_status=1
+		fi
+	      done
+	      IFS="$save_ifs"
+	    fi
+	    # FIXME: should reinstall the best remaining shared library.
+	  fi
+	fi
+	;;
+
+      *.lo)
+	if test "$build_old_libs" = yes; then
+	  oldobj=`$echo "X$name" | $Xsed -e "$lo2o"`
+	  rmfiles="$rmfiles $dir/$oldobj"
+	fi
+	;;
+
+      *)
+	# Do a test to see if this is a libtool program.
+	if test $mode = clean &&
+	   (${SED} -e '4q' $file | egrep "^# Generated by .*$PACKAGE") >/dev/null 2>&1; then
+	  relink_command=
+	  . $dir/$file
+
+	  rmfiles="$rmfiles $objdir/$name $objdir/${name}S.${objext}"
+	  if test "$fast_install" = yes && test -n "$relink_command"; then
+	    rmfiles="$rmfiles $objdir/lt-$name"
+	  fi
+	fi
+	;;
+      esac
+      $show "$rm $rmfiles"
+      $run $rm $rmfiles || exit_status=1
+    done
+
+    # Try to remove the ${objdir}s in the directories where we deleted files
+    for dir in $rmdirs; do
+      if test -d "$dir"; then
+	$show "rmdir $dir"
+	$run rmdir $dir >/dev/null 2>&1
+      fi
+    done
+
+    exit $exit_status
+    ;;
+
+  "")
+    $echo "$modename: you must specify a MODE" 1>&2
+    $echo "$generic_help" 1>&2
+    exit 1
+    ;;
+  esac
+
+  if test -z "$exec_cmd"; then
+    $echo "$modename: invalid operation mode \`$mode'" 1>&2
+    $echo "$generic_help" 1>&2
+    exit 1
+  fi
+fi # test -z "$show_help"
+
+if test -n "$exec_cmd"; then
+  eval exec $exec_cmd
+  exit 1
+fi
+
+# We need to display help for each of the modes.
+case $mode in
+"") $echo \
+"Usage: $modename [OPTION]... [MODE-ARG]...
+
+Provide generalized library-building support services.
+
+    --config          show all configuration variables
+    --debug           enable verbose shell tracing
+-n, --dry-run         display commands without modifying any files
+    --features        display basic configuration information and exit
+    --finish          same as \`--mode=finish'
+    --help            display this help message and exit
+    --mode=MODE       use operation mode MODE [default=inferred from MODE-ARGS]
+    --quiet           same as \`--silent'
+    --silent          don't print informational messages
+    --version         print version information
+
+MODE must be one of the following:
+
+      clean           remove files from the build directory
+      compile         compile a source file into a libtool object
+      execute         automatically set library path, then run a program
+      finish          complete the installation of libtool libraries
+      install         install libraries or executables
+      link            create a library or an executable
+      uninstall       remove libraries from an installed directory
+
+MODE-ARGS vary depending on the MODE.  Try \`$modename --help --mode=MODE' for
+a more detailed description of MODE."
+  exit 0
+  ;;
+
+clean)
+  $echo \
+"Usage: $modename [OPTION]... --mode=clean RM [RM-OPTION]... FILE...
+
+Remove files from the build directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically \`/bin/rm').  RM-OPTIONS are options (such as \`-f') to be passed
+to RM.
+
+If FILE is a libtool library, object or program, all the files associated
+with it are deleted. Otherwise, only FILE itself is deleted using RM."
+  ;;
+
+compile)
+  $echo \
+"Usage: $modename [OPTION]... --mode=compile COMPILE-COMMAND... SOURCEFILE
+
+Compile a source file into a libtool library object.
+
+This mode accepts the following additional options:
+
+  -o OUTPUT-FILE    set the output file name to OUTPUT-FILE
+  -prefer-pic       try to building PIC objects only
+  -prefer-non-pic   try to building non-PIC objects only
+  -static           always build a \`.o' file suitable for static linking
+
+COMPILE-COMMAND is a command to be used in creating a \`standard' object file
+from the given SOURCEFILE.
+
+The output file name is determined by removing the directory component from
+SOURCEFILE, then substituting the C source code suffix \`.c' with the
+library object suffix, \`.lo'."
+  ;;
+
+execute)
+  $echo \
+"Usage: $modename [OPTION]... --mode=execute COMMAND [ARGS]...
+
+Automatically set library path, then run a program.
+
+This mode accepts the following additional options:
+
+  -dlopen FILE      add the directory containing FILE to the library path
+
+This mode sets the library path environment variable according to \`-dlopen'
+flags.
+
+If any of the ARGS are libtool executable wrappers, then they are translated
+into their corresponding uninstalled binary, and any of their required library
+directories are added to the library path.
+
+Then, COMMAND is executed, with ARGS as arguments."
+  ;;
+
+finish)
+  $echo \
+"Usage: $modename [OPTION]... --mode=finish [LIBDIR]...
+
+Complete the installation of libtool libraries.
+
+Each LIBDIR is a directory that contains libtool libraries.
+
+The commands that this mode executes may require superuser privileges.  Use
+the \`--dry-run' option if you just want to see what would be executed."
+  ;;
+
+install)
+  $echo \
+"Usage: $modename [OPTION]... --mode=install INSTALL-COMMAND...
+
+Install executables or libraries.
+
+INSTALL-COMMAND is the installation command.  The first component should be
+either the \`install' or \`cp' program.
+
+The rest of the components are interpreted as arguments to that command (only
+BSD-compatible install options are recognized)."
+  ;;
+
+link)
+  $echo \
+"Usage: $modename [OPTION]... --mode=link LINK-COMMAND...
+
+Link object files or libraries together to form another library, or to
+create an executable program.
+
+LINK-COMMAND is a command using the C compiler that you would use to create
+a program from several object files.
+
+The following components of LINK-COMMAND are treated specially:
+
+  -all-static       do not do any dynamic linking at all
+  -avoid-version    do not add a version suffix if possible
+  -dlopen FILE      \`-dlpreopen' FILE if it cannot be dlopened at runtime
+  -dlpreopen FILE   link in FILE and add its symbols to lt_preloaded_symbols
+  -export-dynamic   allow symbols from OUTPUT-FILE to be resolved with dlsym(3)
+  -export-symbols SYMFILE
+		    try to export only the symbols listed in SYMFILE
+  -export-symbols-regex REGEX
+		    try to export only the symbols matching REGEX
+  -LLIBDIR          search LIBDIR for required installed libraries
+  -lNAME            OUTPUT-FILE requires the installed library libNAME
+  -module           build a library that can dlopened
+  -no-fast-install  disable the fast-install mode
+  -no-install       link a not-installable executable
+  -no-undefined     declare that a library does not refer to external symbols
+  -o OUTPUT-FILE    create OUTPUT-FILE from the specified objects
+  -release RELEASE  specify package release information
+  -rpath LIBDIR     the created library will eventually be installed in LIBDIR
+  -R[ ]LIBDIR       add LIBDIR to the runtime path of programs and libraries
+  -static           do not do any dynamic linking of libtool libraries
+  -version-info CURRENT[:REVISION[:AGE]]
+		    specify library version info [each variable defaults to 0]
+
+All other options (arguments beginning with \`-') are ignored.
+
+Every other argument is treated as a filename.  Files ending in \`.la' are
+treated as uninstalled libtool libraries, other files are standard or library
+object files.
+
+If the OUTPUT-FILE ends in \`.la', then a libtool library is created,
+only library objects (\`.lo' files) may be specified, and \`-rpath' is
+required, except when creating a convenience library.
+
+If OUTPUT-FILE ends in \`.a' or \`.lib', then a standard library is created
+using \`ar' and \`ranlib', or on Windows using \`lib'.
+
+If OUTPUT-FILE ends in \`.lo' or \`.${objext}', then a reloadable object file
+is created, otherwise an executable program is created."
+  ;;
+
+uninstall)
+  $echo \
+"Usage: $modename [OPTION]... --mode=uninstall RM [RM-OPTION]... FILE...
+
+Remove libraries from an installation directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically \`/bin/rm').  RM-OPTIONS are options (such as \`-f') to be passed
+to RM.
+
+If FILE is a libtool library, all the files associated with it are deleted.
+Otherwise, only FILE itself is deleted using RM."
+  ;;
+
+*)
+  $echo "$modename: invalid operation mode \`$mode'" 1>&2
+  $echo "$help" 1>&2
+  exit 1
+  ;;
+esac
+
+echo
+$echo "Try \`$modename --help' for more information about other modes."
+
+exit 0
+
+# Local Variables:
+# mode:shell-script
+# sh-indentation:2
+# End:
diff --git a/external-libs/pcre/maketables.c b/external-libs/pcre/maketables.c
new file mode 100644
index 00000000..bf88531b
--- /dev/null
+++ b/external-libs/pcre/maketables.c
@@ -0,0 +1,140 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+
+See the file Tech.Notes for some information on the internals.
+*/
+
+
+/* This file is compiled on its own as part of the PCRE library. However,
+it is also included in the compilation of dftables.c, in which case the macro
+DFTABLES is defined. */
+
+#ifndef DFTABLES
+#include "internal.h"
+#endif
+
+
+
+/*************************************************
+*           Create PCRE character tables         *
+*************************************************/
+
+/* This function builds a set of character tables for use by PCRE and returns
+a pointer to them. They are build using the ctype functions, and consequently
+their contents will depend upon the current locale setting. When compiled as
+part of the library, the store is obtained via pcre_malloc(), but when compiled
+inside dftables, use malloc().
+
+Arguments:   none
+Returns:     pointer to the contiguous block of data
+*/
+
+const unsigned char *
+pcre_maketables(void)
+{
+unsigned char *yield, *p;
+int i;
+
+#ifndef DFTABLES
+yield = (unsigned char*)(pcre_malloc)(tables_length);
+#else
+yield = (unsigned char*)malloc(tables_length);
+#endif
+
+if (yield == NULL) return NULL;
+p = yield;
+
+/* First comes the lower casing table */
+
+for (i = 0; i < 256; i++) *p++ = tolower(i);
+
+/* Next the case-flipping table */
+
+for (i = 0; i < 256; i++) *p++ = islower(i)? toupper(i) : tolower(i);
+
+/* Then the character class tables. Don't try to be clever and save effort
+on exclusive ones - in some locales things may be different. Note that the
+table for "space" includes everything "isspace" gives, including VT in the
+default locale. This makes it work for the POSIX class [:space:]. */
+
+memset(p, 0, cbit_length);
+for (i = 0; i < 256; i++)
+  {
+  if (isdigit(i))
+    {
+    p[cbit_digit  + i/8] |= 1 << (i&7);
+    p[cbit_word   + i/8] |= 1 << (i&7);
+    }
+  if (isupper(i))
+    {
+    p[cbit_upper  + i/8] |= 1 << (i&7);
+    p[cbit_word   + i/8] |= 1 << (i&7);
+    }
+  if (islower(i))
+    {
+    p[cbit_lower  + i/8] |= 1 << (i&7);
+    p[cbit_word   + i/8] |= 1 << (i&7);
+    }
+  if (i == '_')   p[cbit_word   + i/8] |= 1 << (i&7);
+  if (isspace(i)) p[cbit_space  + i/8] |= 1 << (i&7);
+  if (isxdigit(i))p[cbit_xdigit + i/8] |= 1 << (i&7);
+  if (isgraph(i)) p[cbit_graph  + i/8] |= 1 << (i&7);
+  if (isprint(i)) p[cbit_print  + i/8] |= 1 << (i&7);
+  if (ispunct(i)) p[cbit_punct  + i/8] |= 1 << (i&7);
+  if (iscntrl(i)) p[cbit_cntrl  + i/8] |= 1 << (i&7);
+  }
+p += cbit_length;
+
+/* Finally, the character type table. In this, we exclude VT from the white
+space chars, because Perl doesn't recognize it as such for \s and for comments
+within regexes. */
+
+for (i = 0; i < 256; i++)
+  {
+  int x = 0;
+  if (i != 0x0b && isspace(i)) x += ctype_space;
+  if (isalpha(i)) x += ctype_letter;
+  if (isdigit(i)) x += ctype_digit;
+  if (isxdigit(i)) x += ctype_xdigit;
+  if (isalnum(i) || i == '_') x += ctype_word;
+
+  /* Note: strchr includes the terminating zero in the characters it considers.
+  In this instance, that is ok because we want binary zero to be flagged as a
+  meta-character, which in this sense is any character that terminates a run
+  of data characters. */
+
+  if (strchr("*+?{^.$|()[", i) != 0) x += ctype_meta; *p++ = x; }
+
+return yield;
+}
+
+/* End of maketables.c */
diff --git a/external-libs/pcre/makevp.bat b/external-libs/pcre/makevp.bat
new file mode 100644
index 00000000..10bd2487
--- /dev/null
+++ b/external-libs/pcre/makevp.bat
@@ -0,0 +1,25 @@
+@echo off
+
+REM This file was contributed by Alexander Tokarev for building PCRE for use
+REM with Virtual Pascal. It has not been tested with the latest PCRE release.
+
+REM CHANGE THIS FOR YOUR BORLAND C++ COMPILER PATH
+
+SET BORLAND=c:\usr\apps\bcc55
+
+sh configure
+
+bcc32 -DDFTABLES -DSTATIC -DVPCOMPAT -I%BORLAND%\include -L%BORLAND%\lib dftables.c
+
+dftables > chartables.c
+
+bcc32 -c -RT- -y- -v- -u- -P- -O2 -5 -DSTATIC -DVPCOMPAT -UDFTABLES -I%BORLAND%\include get.c maketables.c pcre.c study.c
+
+tlib %BORLAND%\lib\cw32.lib *calloc *del *strncmp *memcpy *memmove *memset
+tlib pcre.lib +get.obj +maketables.obj +pcre.obj +study.obj +calloc.obj +del.obj +strncmp.obj +memcpy.obj +memmove.obj +memset.obj
+
+del *.obj *.exe *.tds *.bak >nul 2>nul
+
+echo ---
+echo Now the library should be complete. Please check all messages above.
+echo Don't care for warnings, it's OK.
diff --git a/external-libs/pcre/mkinstalldirs b/external-libs/pcre/mkinstalldirs
new file mode 100644
index 00000000..70f983f5
--- /dev/null
+++ b/external-libs/pcre/mkinstalldirs
@@ -0,0 +1,40 @@
+#! /bin/sh
+# mkinstalldirs --- make directory hierarchy
+# Author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Public domain
+
+# $Id: mkinstalldirs,v 1.12.2.1 1998/12/26 17:32:14 bje Exp $
+
+errstatus=0
+
+for file
+do
+   set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+   shift
+
+   pathcomp=
+   for d
+   do
+     pathcomp="$pathcomp$d"
+     case "$pathcomp" in
+       -* ) pathcomp=./$pathcomp ;;
+     esac
+
+     if test ! -d "$pathcomp"; then
+        echo "mkdir $pathcomp"
+
+        mkdir "$pathcomp" || lasterr=$?
+
+        if test ! -d "$pathcomp"; then
+  	  errstatus=$lasterr
+        fi
+     fi
+
+     pathcomp="$pathcomp/"
+   done
+done
+
+exit $errstatus
+
+# mkinstalldirs ends here
diff --git a/external-libs/pcre/pcre-config.in b/external-libs/pcre/pcre-config.in
new file mode 100644
index 00000000..8daded9f
--- /dev/null
+++ b/external-libs/pcre/pcre-config.in
@@ -0,0 +1,59 @@
+#!/bin/sh
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+exec_prefix_set=no
+
+usage="\
+Usage: pcre-config [--prefix] [--exec-prefix] [--version] [--libs] [--libs-posix] [--cflags] [--cflags-posix]"
+
+if test $# -eq 0; then
+      echo "${usage}" 1>&2
+      exit 1
+fi
+
+while test $# -gt 0; do
+  case "$1" in
+  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+  *) optarg= ;;
+  esac
+
+  case $1 in
+    --prefix=*)
+      prefix=$optarg
+      if test $exec_prefix_set = no ; then
+        exec_prefix=$optarg
+      fi
+      ;;
+    --prefix)
+      echo $prefix
+      ;;
+    --exec-prefix=*)
+      exec_prefix=$optarg
+      exec_prefix_set=yes
+      ;;
+    --exec-prefix)
+      echo $exec_prefix
+      ;;
+    --version)
+      echo @PCRE_VERSION@
+      ;;
+    --cflags | --cflags-posix)
+      if test @includedir@ != /usr/include ; then
+        includes=-I@includedir@
+      fi
+      echo $includes
+      ;;
+    --libs-posix)
+      echo -L@libdir@ -lpcreposix -lpcre
+      ;;
+    --libs)
+      echo -L@libdir@ -lpcre
+      ;;
+    *)
+      echo "${usage}" 1>&2
+      exit 1
+      ;;
+  esac
+  shift
+done
diff --git a/external-libs/pcre/pcre.c b/external-libs/pcre/pcre.c
new file mode 100644
index 00000000..5afca109
--- /dev/null
+++ b/external-libs/pcre/pcre.c
@@ -0,0 +1,8304 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+
+/* Define DEBUG to get debugging output on stdout. */
+/* #define DEBUG */
+
+/* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef
+inline, and there are *still* stupid compilers about that don't like indented
+pre-processor statements. I suppose it's only been 10 years... */
+
+#ifdef DEBUG
+#define DPRINTF(p) printf p
+#else
+#define DPRINTF(p) /*nothing*/
+#endif
+
+/* Include the internals header, which itself includes "config.h", the Standard
+C headers, and the external pcre header. */
+
+#include "internal.h"
+
+
+/* Allow compilation as C++ source code, should anybody want to do that. */
+
+#ifdef __cplusplus
+#define class pcre_class
+#endif
+
+
+/* Maximum number of items on the nested bracket stacks at compile time. This
+applies to the nesting of all kinds of parentheses. It does not limit
+un-nested, non-capturing parentheses. This number can be made bigger if
+necessary - it is used to dimension one int and one unsigned char vector at
+compile time. */
+
+#define BRASTACK_SIZE 200
+
+
+/* Maximum number of ints of offset to save on the stack for recursive calls.
+If the offset vector is bigger, malloc is used. This should be a multiple of 3,
+because the offset vector is always a multiple of 3 long. */
+
+#define REC_STACK_SAVE_MAX 30
+
+
+/* The number of bytes in a literal character string above which we can't add
+any more is set at 250 in order to allow for UTF-8 characters. (In theory it
+could be 255 when UTF-8 support is excluded, but that means that some of the
+test output would be different, which just complicates things.) */
+
+#define MAXLIT 250
+
+
+/* The maximum remaining length of subject we are prepared to search for a
+req_byte match. */
+
+#define REQ_BYTE_MAX 1000
+
+
+/* Table of sizes for the fixed-length opcodes. It's defined in a macro so that
+the definition is next to the definition of the opcodes in internal.h. */
+
+static const uschar OP_lengths[] = { OP_LENGTHS };
+
+/* Min and max values for the common repeats; for the maxima, 0 => infinity */
+
+static const char rep_min[] = { 0, 0, 1, 1, 0, 0 };
+static const char rep_max[] = { 0, 0, 0, 0, 1, 1 };
+
+/* Table for handling escaped characters in the range '0'-'z'. Positive returns
+are simple data values; negative values are for special things like \d and so
+on. Zero means further processing is needed (for things like \x), or the escape
+is invalid. */
+
+#if !EBCDIC   /* This is the "normal" table for ASCII systems */
+static const short int escapes[] = {
+    0,      0,      0,      0,      0,      0,      0,      0,   /* 0 - 7 */
+    0,      0,    ':',    ';',    '<',    '=',    '>',    '?',   /* 8 - ? */
+  '@', -ESC_A, -ESC_B, -ESC_C, -ESC_D, -ESC_E,      0, -ESC_G,   /* @ - G */
+    0,      0,      0,      0,      0,      0,      0,      0,   /* H - O */
+    0, -ESC_Q,      0, -ESC_S,      0,      0,      0, -ESC_W,   /* P - W */
+    0,      0, -ESC_Z,    '[',   '\\',    ']',    '^',    '_',   /* X - _ */
+  '`',      7, -ESC_b,      0, -ESC_d,  ESC_e,  ESC_f,      0,   /* ` - g */
+    0,      0,      0,      0,      0,      0,  ESC_n,      0,   /* h - o */
+    0,      0,  ESC_r, -ESC_s,  ESC_tee,    0,      0, -ESC_w,   /* p - w */
+    0,      0, -ESC_z                                            /* x - z */
+};
+
+#else         /* This is the "abnormal" table for EBCDIC systems */
+static const short int escapes[] = {
+/*  48 */     0,     0,      0,     '.',    '<',   '(',    '+',    '|',
+/*  50 */   '&',     0,      0,       0,      0,     0,      0,      0,
+/*  58 */     0,     0,    '!',     '$',    '*',   ')',    ';',    '~',
+/*  60 */   '-',   '/',      0,       0,      0,     0,      0,      0,
+/*  68 */     0,     0,    '|',     ',',    '%',   '_',    '>',    '?',
+/*  70 */     0,     0,      0,       0,      0,     0,      0,      0,
+/*  78 */     0,   '`',    ':',     '#',    '@',  '\'',    '=',    '"',
+/*  80 */     0,     7, -ESC_b,       0, -ESC_d, ESC_e,  ESC_f,      0,
+/*  88 */     0,     0,      0,     '{',      0,     0,      0,      0,
+/*  90 */     0,     0,      0,     'l',      0, ESC_n,      0,      0,
+/*  98 */     0, ESC_r,      0,     '}',      0,     0,      0,      0,
+/*  A0 */     0,   '~', -ESC_s, ESC_tee,      0,     0, -ESC_w,      0,
+/*  A8 */     0,-ESC_z,      0,       0,      0,   '[',      0,      0,
+/*  B0 */     0,     0,      0,       0,      0,     0,      0,      0,
+/*  B8 */     0,     0,      0,       0,      0,   ']',    '=',    '-',
+/*  C0 */   '{',-ESC_A, -ESC_B,  -ESC_C, -ESC_D,-ESC_E,      0, -ESC_G,
+/*  C8 */     0,     0,      0,       0,      0,     0,      0,      0,
+/*  D0 */   '}',     0,      0,       0,      0,     0,      0,      0,
+/*  D8 */-ESC_Q,     0,      0,       0,      0,     0,      0,      0,
+/*  E0 */  '\\',     0, -ESC_S,       0,      0,     0, -ESC_W,      0,
+/*  E8 */     0,-ESC_Z,      0,       0,      0,     0,      0,      0,
+/*  F0 */     0,     0,      0,       0,      0,     0,      0,      0,
+/*  F8 */     0,     0,      0,       0,      0,     0,      0,      0
+};
+#endif
+
+
+/* Tables of names of POSIX character classes and their lengths. The list is
+terminated by a zero length entry. The first three must be alpha, upper, lower,
+as this is assumed for handling case independence. */
+
+static const char *const posix_names[] = {
+  "alpha", "lower", "upper",
+  "alnum", "ascii", "blank", "cntrl", "digit", "graph",
+  "print", "punct", "space", "word",  "xdigit" };
+
+static const uschar posix_name_lengths[] = {
+  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 6, 0 };
+
+/* Table of class bit maps for each POSIX class; up to three may be combined
+to form the class. The table for [:blank:] is dynamically modified to remove
+the vertical space characters. */
+
+static const int posix_class_maps[] = {
+  cbit_lower, cbit_upper, -1,             /* alpha */
+  cbit_lower, -1,         -1,             /* lower */
+  cbit_upper, -1,         -1,             /* upper */
+  cbit_digit, cbit_lower, cbit_upper,     /* alnum */
+  cbit_print, cbit_cntrl, -1,             /* ascii */
+  cbit_space, -1,         -1,             /* blank - a GNU extension */
+  cbit_cntrl, -1,         -1,             /* cntrl */
+  cbit_digit, -1,         -1,             /* digit */
+  cbit_graph, -1,         -1,             /* graph */
+  cbit_print, -1,         -1,             /* print */
+  cbit_punct, -1,         -1,             /* punct */
+  cbit_space, -1,         -1,             /* space */
+  cbit_word,  -1,         -1,             /* word - a Perl extension */
+  cbit_xdigit,-1,         -1              /* xdigit */
+};
+
+/* Table to identify digits and hex digits. This is used when compiling
+patterns. Note that the tables in chartables are dependent on the locale, and
+may mark arbitrary characters as digits - but the PCRE compiling code expects
+to handle only 0-9, a-z, and A-Z as digits when compiling. That is why we have
+a private table here. It costs 256 bytes, but it is a lot faster than doing
+character value tests (at least in some simple cases I timed), and in some
+applications one wants PCRE to compile efficiently as well as match
+efficiently.
+
+For convenience, we use the same bit definitions as in chartables:
+
+  0x04   decimal digit
+  0x08   hexadecimal digit
+
+Then we can use ctype_digit and ctype_xdigit in the code. */
+
+#if !EBCDIC    /* This is the "normal" case, for ASCII systems */
+static const unsigned char digitab[] =
+  {
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*   0-  7 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*   8- 15 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  16- 23 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  24- 31 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*    - '  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  ( - /  */
+  0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, /*  0 - 7  */
+  0x0c,0x0c,0x00,0x00,0x00,0x00,0x00,0x00, /*  8 - ?  */
+  0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00, /*  @ - G  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  H - O  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  P - W  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  X - _  */
+  0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00, /*  ` - g  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  h - o  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  p - w  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  x -127 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 128-135 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 136-143 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 144-151 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 152-159 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 160-167 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 168-175 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 176-183 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 184-191 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 192-199 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 200-207 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 208-215 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 216-223 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 224-231 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 232-239 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 240-247 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};/* 248-255 */
+
+#else          /* This is the "abnormal" case, for EBCDIC systems */
+static const unsigned char digitab[] =
+  {
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*   0-  7  0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*   8- 15    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  16- 23 10 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  24- 31    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  32- 39 20 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  40- 47    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  48- 55 30 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  56- 63    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*    - 71 40 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  72- |     */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  & - 87 50 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  88- �     */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  - -103 60 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 104- ?     */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 112-119 70 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 120- "     */
+  0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00, /* 128- g  80 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  h -143    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 144- p  90 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  q -159    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 160- x  A0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  y -175    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  ^ -183 B0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 184-191    */
+  0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00, /*  { - G  C0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  H -207    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  } - P  D0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  Q -223    */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  \ - X  E0 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  Y -239    */
+  0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, /*  0 - 7  F0 */
+  0x0c,0x0c,0x00,0x00,0x00,0x00,0x00,0x00};/*  8 -255    */
+
+static const unsigned char ebcdic_chartab[] = { /* chartable partial dup */
+  0x80,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /*   0-  7 */
+  0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x00, /*   8- 15 */
+  0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /*  16- 23 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  24- 31 */
+  0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /*  32- 39 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  40- 47 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  48- 55 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  56- 63 */
+  0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*    - 71 */
+  0x00,0x00,0x00,0x80,0x00,0x80,0x80,0x80, /*  72- |  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  & - 87 */
+  0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00, /*  88- �  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  - -103 */
+  0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x80, /* 104- ?  */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 112-119 */
+  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 120- "  */
+  0x00,0x1a,0x1a,0x1a,0x1a,0x1a,0x1a,0x12, /* 128- g  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  h -143 */
+  0x00,0x12,0x12,0x12,0x12,0x12,0x12,0x12, /* 144- p  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  q -159 */
+  0x00,0x00,0x12,0x12,0x12,0x12,0x12,0x12, /* 160- x  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  y -175 */
+  0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /*  ^ -183 */
+  0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00, /* 184-191 */
+  0x80,0x1a,0x1a,0x1a,0x1a,0x1a,0x1a,0x12, /*  { - G  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  H -207 */
+  0x00,0x12,0x12,0x12,0x12,0x12,0x12,0x12, /*  } - P  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  Q -223 */
+  0x00,0x00,0x12,0x12,0x12,0x12,0x12,0x12, /*  \ - X  */
+  0x12,0x12,0x00,0x00,0x00,0x00,0x00,0x00, /*  Y -239 */
+  0x1c,0x1c,0x1c,0x1c,0x1c,0x1c,0x1c,0x1c, /*  0 - 7  */
+  0x1c,0x1c,0x00,0x00,0x00,0x00,0x00,0x00};/*  8 -255 */
+#endif
+
+
+/* Definition to allow mutual recursion */
+
+static BOOL
+  compile_regex(int, int, int *, uschar **, const uschar **, const char **,
+    BOOL, int, int *, int *, branch_chain *, compile_data *);
+
+/* Structure for building a chain of data that actually lives on the
+stack, for holding the values of the subject pointer at the start of each
+subpattern, so as to detect when an empty string has been matched by a
+subpattern - to break infinite loops. When NO_RECURSE is set, these blocks
+are on the heap, not on the stack. */
+
+typedef struct eptrblock {
+  struct eptrblock *epb_prev;
+  const uschar *epb_saved_eptr;
+} eptrblock;
+
+/* Flag bits for the match() function */
+
+#define match_condassert   0x01    /* Called to check a condition assertion */
+#define match_isgroup      0x02    /* Set if start of bracketed group */
+
+/* Non-error returns from the match() function. Error returns are externally
+defined PCRE_ERROR_xxx codes, which are all negative. */
+
+#define MATCH_MATCH        1
+#define MATCH_NOMATCH      0
+
+
+
+/*************************************************
+*               Global variables                 *
+*************************************************/
+
+/* PCRE is thread-clean and doesn't use any global variables in the normal
+sense. However, it calls memory allocation and free functions via the four
+indirections below, and it can optionally do callouts. These values can be
+changed by the caller, but are shared between all threads. However, when
+compiling for Virtual Pascal, things are done differently (see pcre.in). */
+
+#ifndef VPCOMPAT
+#ifdef __cplusplus
+extern "C" void *(*pcre_malloc)(size_t) = malloc;
+extern "C" void  (*pcre_free)(void *) = free;
+extern "C" void *(*pcre_stack_malloc)(size_t) = malloc;
+extern "C" void  (*pcre_stack_free)(void *) = free;
+extern "C" int   (*pcre_callout)(pcre_callout_block *) = NULL;
+#else
+void *(*pcre_malloc)(size_t) = malloc;
+void  (*pcre_free)(void *) = free;
+void *(*pcre_stack_malloc)(size_t) = malloc;
+void  (*pcre_stack_free)(void *) = free;
+int   (*pcre_callout)(pcre_callout_block *) = NULL;
+#endif
+#endif
+
+
+/*************************************************
+*    Macros and tables for character handling    *
+*************************************************/
+
+/* When UTF-8 encoding is being used, a character is no longer just a single
+byte. The macros for character handling generate simple sequences when used in
+byte-mode, and more complicated ones for UTF-8 characters. */
+
+#ifndef SUPPORT_UTF8
+#define GETCHAR(c, eptr) c = *eptr;
+#define GETCHARINC(c, eptr) c = *eptr++;
+#define GETCHARINCTEST(c, eptr) c = *eptr++;
+#define GETCHARLEN(c, eptr, len) c = *eptr;
+#define BACKCHAR(eptr)
+
+#else   /* SUPPORT_UTF8 */
+
+/* Get the next UTF-8 character, not advancing the pointer. This is called when
+we know we are in UTF-8 mode. */
+
+#define GETCHAR(c, eptr) \
+  c = *eptr; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcii; \
+    int gcaa = utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & utf8_table3[gcaa]) << gcss; \
+    for (gcii = 1; gcii <= gcaa; gcii++) \
+      { \
+      gcss -= 6; \
+      c |= (eptr[gcii] & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next UTF-8 character, advancing the pointer. This is called when we
+know we are in UTF-8 mode. */
+
+#define GETCHARINC(c, eptr) \
+  c = *eptr++; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcaa = utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & utf8_table3[gcaa]) << gcss; \
+    while (gcaa-- > 0) \
+      { \
+      gcss -= 6; \
+      c |= (*eptr++ & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next character, testing for UTF-8 mode, and advancing the pointer */
+
+#define GETCHARINCTEST(c, eptr) \
+  c = *eptr++; \
+  if (md->utf8 && (c & 0xc0) == 0xc0) \
+    { \
+    int gcaa = utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & utf8_table3[gcaa]) << gcss; \
+    while (gcaa-- > 0) \
+      { \
+      gcss -= 6; \
+      c |= (*eptr++ & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next UTF-8 character, not advancing the pointer, incrementing length
+if there are extra bytes. This is called when we know we are in UTF-8 mode. */
+
+#define GETCHARLEN(c, eptr, len) \
+  c = *eptr; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcii; \
+    int gcaa = utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & utf8_table3[gcaa]) << gcss; \
+    for (gcii = 1; gcii <= gcaa; gcii++) \
+      { \
+      gcss -= 6; \
+      c |= (eptr[gcii] & 0x3f) << gcss; \
+      } \
+    len += gcaa; \
+    }
+
+/* If the pointer is not at the start of a character, move it back until
+it is. Called only in UTF-8 mode. */
+
+#define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--;
+
+#endif
+
+
+
+/*************************************************
+*             Default character tables           *
+*************************************************/
+
+/* A default set of character tables is included in the PCRE binary. Its source
+is built by the maketables auxiliary program, which uses the default C ctypes
+functions, and put in the file chartables.c. These tables are used by PCRE
+whenever the caller of pcre_compile() does not provide an alternate set of
+tables. */
+
+#include "chartables.c"
+
+
+
+#ifdef SUPPORT_UTF8
+/*************************************************
+*           Tables for UTF-8 support             *
+*************************************************/
+
+/* These are the breakpoints for different numbers of bytes in a UTF-8
+character. */
+
+static const int utf8_table1[] =
+  { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff};
+
+/* These are the indicator bits and the mask for the data bits to set in the
+first byte of a character, indexed by the number of additional bytes. */
+
+static const int utf8_table2[] = { 0,    0xc0, 0xe0, 0xf0, 0xf8, 0xfc};
+static const int utf8_table3[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};
+
+/* Table of the number of extra characters, indexed by the first character
+masked with 0x3f. The highest number for a valid UTF-8 character is in fact
+0x3d. */
+
+static const uschar utf8_table4[] = {
+  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+  3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 };
+
+
+/*************************************************
+*       Convert character value to UTF-8         *
+*************************************************/
+
+/* This function takes an integer value in the range 0 - 0x7fffffff
+and encodes it as a UTF-8 character in 0 to 6 bytes.
+
+Arguments:
+  cvalue     the character value
+  buffer     pointer to buffer for result - at least 6 bytes long
+
+Returns:     number of characters placed in the buffer
+*/
+
+static int
+ord2utf8(int cvalue, uschar *buffer)
+{
+register int i, j;
+for (i = 0; i < sizeof(utf8_table1)/sizeof(int); i++)
+  if (cvalue <= utf8_table1[i]) break;
+buffer += i;
+for (j = i; j > 0; j--)
+ {
+ *buffer-- = 0x80 | (cvalue & 0x3f);
+ cvalue >>= 6;
+ }
+*buffer = utf8_table2[i] | cvalue;
+return i + 1;
+}
+#endif
+
+
+
+/*************************************************
+*         Print compiled regex                   *
+*************************************************/
+
+/* The code for doing this is held in a separate file that is also included in
+pcretest.c. It defines a function called print_internals(). */
+
+#ifdef DEBUG
+#include "printint.c"
+#endif
+
+
+
+/*************************************************
+*          Return version string                 *
+*************************************************/
+
+#define STRING(a)  # a
+#define XSTRING(s) STRING(s)
+
+EXPORT const char *
+pcre_version(void)
+{
+return XSTRING(PCRE_MAJOR) "." XSTRING(PCRE_MINOR) " " XSTRING(PCRE_DATE);
+}
+
+
+
+
+/*************************************************
+* (Obsolete) Return info about compiled pattern  *
+*************************************************/
+
+/* This is the original "info" function. It picks potentially useful data out
+of the private structure, but its interface was too rigid. It remains for
+backwards compatibility. The public options are passed back in an int - though
+the re->options field has been expanded to a long int, all the public options
+at the low end of it, and so even on 16-bit systems this will still be OK.
+Therefore, I haven't changed the API for pcre_info().
+
+Arguments:
+  external_re   points to compiled code
+  optptr        where to pass back the options
+  first_byte    where to pass back the first character,
+                or -1 if multiline and all branches start ^,
+                or -2 otherwise
+
+Returns:        number of capturing subpatterns
+                or negative values on error
+*/
+
+EXPORT int
+pcre_info(const pcre *external_re, int *optptr, int *first_byte)
+{
+const real_pcre *re = (const real_pcre *)external_re;
+if (re == NULL) return PCRE_ERROR_NULL;
+if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC;
+if (optptr != NULL) *optptr = (int)(re->options & PUBLIC_OPTIONS);
+if (first_byte != NULL)
+  *first_byte = ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
+     ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
+return re->top_bracket;
+}
+
+
+
+/*************************************************
+*        Return info about compiled pattern      *
+*************************************************/
+
+/* This is a newer "info" function which has an extensible interface so
+that additional items can be added compatibly.
+
+Arguments:
+  external_re      points to compiled code
+  extra_data       points extra data, or NULL
+  what             what information is required
+  where            where to put the information
+
+Returns:           0 if data returned, negative on error
+*/
+
+EXPORT int
+pcre_fullinfo(const pcre *external_re, const pcre_extra *extra_data, int what,
+  void *where)
+{
+const real_pcre *re = (const real_pcre *)external_re;
+const pcre_study_data *study = NULL;
+
+if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
+if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC;
+
+if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
+  study = (const pcre_study_data *)extra_data->study_data;
+
+switch (what)
+  {
+  case PCRE_INFO_OPTIONS:
+  *((unsigned long int *)where) = re->options & PUBLIC_OPTIONS;
+  break;
+
+  case PCRE_INFO_SIZE:
+  *((size_t *)where) = re->size;
+  break;
+
+  case PCRE_INFO_STUDYSIZE:
+  *((size_t *)where) = (study == NULL)? 0 : study->size;
+  break;
+
+  case PCRE_INFO_CAPTURECOUNT:
+  *((int *)where) = re->top_bracket;
+  break;
+
+  case PCRE_INFO_BACKREFMAX:
+  *((int *)where) = re->top_backref;
+  break;
+
+  case PCRE_INFO_FIRSTBYTE:
+  *((int *)where) =
+    ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
+    ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
+  break;
+
+  case PCRE_INFO_FIRSTTABLE:
+  *((const uschar **)where) =
+    (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
+      study->start_bits : NULL;
+  break;
+
+  case PCRE_INFO_LASTLITERAL:
+  *((int *)where) =
+    ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
+  break;
+
+  case PCRE_INFO_NAMEENTRYSIZE:
+  *((int *)where) = re->name_entry_size;
+  break;
+
+  case PCRE_INFO_NAMECOUNT:
+  *((int *)where) = re->name_count;
+  break;
+
+  case PCRE_INFO_NAMETABLE:
+  *((const uschar **)where) = (const uschar *)re + sizeof(real_pcre);
+  break;
+
+  default: return PCRE_ERROR_BADOPTION;
+  }
+
+return 0;
+}
+
+
+
+/*************************************************
+* Return info about what features are configured *
+*************************************************/
+
+/* This is function which has an extensible interface so that additional items
+can be added compatibly.
+
+Arguments:
+  what             what information is required
+  where            where to put the information
+
+Returns:           0 if data returned, negative on error
+*/
+
+EXPORT int
+pcre_config(int what, void *where)
+{
+switch (what)
+  {
+  case PCRE_CONFIG_UTF8:
+#ifdef SUPPORT_UTF8
+  *((int *)where) = 1;
+#else
+  *((int *)where) = 0;
+#endif
+  break;
+
+  case PCRE_CONFIG_NEWLINE:
+  *((int *)where) = NEWLINE;
+  break;
+
+  case PCRE_CONFIG_LINK_SIZE:
+  *((int *)where) = LINK_SIZE;
+  break;
+
+  case PCRE_CONFIG_POSIX_MALLOC_THRESHOLD:
+  *((int *)where) = POSIX_MALLOC_THRESHOLD;
+  break;
+
+  case PCRE_CONFIG_MATCH_LIMIT:
+  *((unsigned int *)where) = MATCH_LIMIT;
+  break;
+
+  case PCRE_CONFIG_STACKRECURSE:
+#ifdef NO_RECURSE
+  *((int *)where) = 0;
+#else
+  *((int *)where) = 1;
+#endif
+  break;
+
+  default: return PCRE_ERROR_BADOPTION;
+  }
+
+return 0;
+}
+
+
+
+#ifdef DEBUG
+/*************************************************
+*        Debugging function to print chars       *
+*************************************************/
+
+/* Print a sequence of chars in printable format, stopping at the end of the
+subject if the requested.
+
+Arguments:
+  p           points to characters
+  length      number to print
+  is_subject  TRUE if printing from within md->start_subject
+  md          pointer to matching data block, if is_subject is TRUE
+
+Returns:     nothing
+*/
+
+static void
+pchars(const uschar *p, int length, BOOL is_subject, match_data *md)
+{
+int c;
+if (is_subject && length > md->end_subject - p) length = md->end_subject - p;
+while (length-- > 0)
+  if (isprint(c = *(p++))) printf("%c", c); else printf("\\x%02x", c);
+}
+#endif
+
+
+
+
+/*************************************************
+*            Handle escapes                      *
+*************************************************/
+
+/* This function is called when a \ has been encountered. It either returns a
+positive value for a simple escape such as \n, or a negative value which
+encodes one of the more complicated things such as \d. When UTF-8 is enabled,
+a positive value greater than 255 may be returned. On entry, ptr is pointing at
+the \. On exit, it is on the final character of the escape sequence.
+
+Arguments:
+  ptrptr     points to the pattern position pointer
+  errorptr   points to the pointer to the error message
+  bracount   number of previous extracting brackets
+  options    the options bits
+  isclass    TRUE if inside a character class
+
+Returns:     zero or positive => a data character
+             negative => a special escape sequence
+             on error, errorptr is set
+*/
+
+static int
+check_escape(const uschar **ptrptr, const char **errorptr, int bracount,
+  int options, BOOL isclass)
+{
+const uschar *ptr = *ptrptr;
+int c, i;
+
+/* If backslash is at the end of the pattern, it's an error. */
+
+c = *(++ptr);
+if (c == 0) *errorptr = ERR1;
+
+/* Non-alphamerics are literals. For digits or letters, do an initial lookup in
+a table. A non-zero result is something that can be returned immediately.
+Otherwise further processing may be required. */
+
+#if !EBCDIC    /* ASCII coding */
+else if (c < '0' || c > 'z') {}                           /* Not alphameric */
+else if ((i = escapes[c - '0']) != 0) c = i;
+
+#else          /* EBCDIC coding */
+else if (c < 'a' || (ebcdic_chartab[c] & 0x0E) == 0) {}   /* Not alphameric */
+else if ((i = escapes[c - 0x48]) != 0)  c = i;
+#endif
+
+/* Escapes that need further processing, or are illegal. */
+
+else
+  {
+  const uschar *oldptr;
+  switch (c)
+    {
+    /* A number of Perl escapes are not handled by PCRE. We give an explicit
+    error. */
+
+    case 'l':
+    case 'L':
+    case 'N':
+    case 'p':
+    case 'P':
+    case 'u':
+    case 'U':
+    case 'X':
+    *errorptr = ERR37;
+    break;
+
+    /* The handling of escape sequences consisting of a string of digits
+    starting with one that is not zero is not straightforward. By experiment,
+    the way Perl works seems to be as follows:
+
+    Outside a character class, the digits are read as a decimal number. If the
+    number is less than 10, or if there are that many previous extracting
+    left brackets, then it is a back reference. Otherwise, up to three octal
+    digits are read to form an escaped byte. Thus \123 is likely to be octal
+    123 (cf \0123, which is octal 012 followed by the literal 3). If the octal
+    value is greater than 377, the least significant 8 bits are taken. Inside a
+    character class, \ followed by a digit is always an octal number. */
+
+    case '1': case '2': case '3': case '4': case '5':
+    case '6': case '7': case '8': case '9':
+
+    if (!isclass)
+      {
+      oldptr = ptr;
+      c -= '0';
+      while ((digitab[ptr[1]] & ctype_digit) != 0)
+        c = c * 10 + *(++ptr) - '0';
+      if (c < 10 || c <= bracount)
+        {
+        c = -(ESC_REF + c);
+        break;
+        }
+      ptr = oldptr;      /* Put the pointer back and fall through */
+      }
+
+    /* Handle an octal number following \. If the first digit is 8 or 9, Perl
+    generates a binary zero byte and treats the digit as a following literal.
+    Thus we have to pull back the pointer by one. */
+
+    if ((c = *ptr) >= '8')
+      {
+      ptr--;
+      c = 0;
+      break;
+      }
+
+    /* \0 always starts an octal number, but we may drop through to here with a
+    larger first octal digit. */
+
+    case '0':
+    c -= '0';
+    while(i++ < 2 && ptr[1] >= '0' && ptr[1] <= '7')
+        c = c * 8 + *(++ptr) - '0';
+    c &= 255;     /* Take least significant 8 bits */
+    break;
+
+    /* \x is complicated when UTF-8 is enabled. \x{ddd} is a character number
+    which can be greater than 0xff, but only if the ddd are hex digits. */
+
+    case 'x':
+#ifdef SUPPORT_UTF8
+    if (ptr[1] == '{' && (options & PCRE_UTF8) != 0)
+      {
+      const uschar *pt = ptr + 2;
+      register int count = 0;
+      c = 0;
+      while ((digitab[*pt] & ctype_xdigit) != 0)
+        {
+        int cc = *pt++;
+        count++;
+#if !EBCDIC    /* ASCII coding */
+        if (cc >= 'a') cc -= 32;               /* Convert to upper case */
+        c = c * 16 + cc - ((cc < 'A')? '0' : ('A' - 10));
+#else          /* EBCDIC coding */
+        if (cc >= 'a' && cc <= 'z') cc += 64;  /* Convert to upper case */
+        c = c * 16 + cc - ((cc >= '0')? '0' : ('A' - 10));
+#endif
+        }
+      if (*pt == '}')
+        {
+        if (c < 0 || count > 8) *errorptr = ERR34;
+        ptr = pt;
+        break;
+        }
+      /* If the sequence of hex digits does not end with '}', then we don't
+      recognize this construct; fall through to the normal \x handling. */
+      }
+#endif
+
+    /* Read just a single hex char */
+
+    c = 0;
+    while (i++ < 2 && (digitab[ptr[1]] & ctype_xdigit) != 0)
+      {
+      int cc;                               /* Some compilers don't like ++ */
+      cc = *(++ptr);                        /* in initializers */
+#if !EBCDIC    /* ASCII coding */
+      if (cc >= 'a') cc -= 32;              /* Convert to upper case */
+      c = c * 16 + cc - ((cc < 'A')? '0' : ('A' - 10));
+#else          /* EBCDIC coding */
+      if (cc <= 'z') cc += 64;              /* Convert to upper case */
+      c = c * 16 + cc - ((cc >= '0')? '0' : ('A' - 10));
+#endif
+      }
+    break;
+
+    /* Other special escapes not starting with a digit are straightforward */
+
+    case 'c':
+    c = *(++ptr);
+    if (c == 0)
+      {
+      *errorptr = ERR2;
+      return 0;
+      }
+
+    /* A letter is upper-cased; then the 0x40 bit is flipped. This coding
+    is ASCII-specific, but then the whole concept of \cx is ASCII-specific.
+    (However, an EBCDIC equivalent has now been added.) */
+
+#if !EBCDIC    /* ASCII coding */
+    if (c >= 'a' && c <= 'z') c -= 32;
+    c ^= 0x40;
+#else          /* EBCDIC coding */
+    if (c >= 'a' && c <= 'z') c += 64;
+    c ^= 0xC0;
+#endif
+    break;
+
+    /* PCRE_EXTRA enables extensions to Perl in the matter of escapes. Any
+    other alphameric following \ is an error if PCRE_EXTRA was set; otherwise,
+    for Perl compatibility, it is a literal. This code looks a bit odd, but
+    there used to be some cases other than the default, and there may be again
+    in future, so I haven't "optimized" it. */
+
+    default:
+    if ((options & PCRE_EXTRA) != 0) switch(c)
+      {
+      default:
+      *errorptr = ERR3;
+      break;
+      }
+    break;
+    }
+  }
+
+*ptrptr = ptr;
+return c;
+}
+
+
+
+/*************************************************
+*            Check for counted repeat            *
+*************************************************/
+
+/* This function is called when a '{' is encountered in a place where it might
+start a quantifier. It looks ahead to see if it really is a quantifier or not.
+It is only a quantifier if it is one of the forms {ddd} {ddd,} or {ddd,ddd}
+where the ddds are digits.
+
+Arguments:
+  p         pointer to the first char after '{'
+
+Returns:    TRUE or FALSE
+*/
+
+static BOOL
+is_counted_repeat(const uschar *p)
+{
+if ((digitab[*p++] & ctype_digit) == 0) return FALSE;
+while ((digitab[*p] & ctype_digit) != 0) p++;
+if (*p == '}') return TRUE;
+
+if (*p++ != ',') return FALSE;
+if (*p == '}') return TRUE;
+
+if ((digitab[*p++] & ctype_digit) == 0) return FALSE;
+while ((digitab[*p] & ctype_digit) != 0) p++;
+
+return (*p == '}');
+}
+
+
+
+/*************************************************
+*         Read repeat counts                     *
+*************************************************/
+
+/* Read an item of the form {n,m} and return the values. This is called only
+after is_counted_repeat() has confirmed that a repeat-count quantifier exists,
+so the syntax is guaranteed to be correct, but we need to check the values.
+
+Arguments:
+  p          pointer to first char after '{'
+  minp       pointer to int for min
+  maxp       pointer to int for max
+             returned as -1 if no max
+  errorptr   points to pointer to error message
+
+Returns:     pointer to '}' on success;
+             current ptr on error, with errorptr set
+*/
+
+static const uschar *
+read_repeat_counts(const uschar *p, int *minp, int *maxp, const char **errorptr)
+{
+int min = 0;
+int max = -1;
+
+while ((digitab[*p] & ctype_digit) != 0) min = min * 10 + *p++ - '0';
+
+if (*p == '}') max = min; else
+  {
+  if (*(++p) != '}')
+    {
+    max = 0;
+    while((digitab[*p] & ctype_digit) != 0) max = max * 10 + *p++ - '0';
+    if (max < min)
+      {
+      *errorptr = ERR4;
+      return p;
+      }
+    }
+  }
+
+/* Do paranoid checks, then fill in the required variables, and pass back the
+pointer to the terminating '}'. */
+
+if (min > 65535 || max > 65535)
+  *errorptr = ERR5;
+else
+  {
+  *minp = min;
+  *maxp = max;
+  }
+return p;
+}
+
+
+
+/*************************************************
+*      Find first significant op code            *
+*************************************************/
+
+/* This is called by several functions that scan a compiled expression looking
+for a fixed first character, or an anchoring op code etc. It skips over things
+that do not influence this. For some calls, a change of option is important.
+
+Arguments:
+  code       pointer to the start of the group
+  options    pointer to external options
+  optbit     the option bit whose changing is significant, or
+               zero if none are
+
+Returns:     pointer to the first significant opcode
+*/
+
+static const uschar*
+first_significant_code(const uschar *code, int *options, int optbit)
+{
+for (;;)
+  {
+  switch ((int)*code)
+    {
+    case OP_OPT:
+    if (optbit > 0 && ((int)code[1] & optbit) != (*options & optbit))
+      *options = (int)code[1];
+    code += 2;
+    break;
+
+    case OP_ASSERT_NOT:
+    case OP_ASSERTBACK:
+    case OP_ASSERTBACK_NOT:
+    do code += GET(code, 1); while (*code == OP_ALT);
+    /* Fall through */
+
+    case OP_CALLOUT:
+    case OP_CREF:
+    case OP_BRANUMBER:
+    case OP_WORD_BOUNDARY:
+    case OP_NOT_WORD_BOUNDARY:
+    code += OP_lengths[*code];
+    break;
+
+    default:
+    return code;
+    }
+  }
+/* Control never reaches here */
+}
+
+
+
+
+/*************************************************
+*        Find the fixed length of a pattern      *
+*************************************************/
+
+/* Scan a pattern and compute the fixed length of subject that will match it,
+if the length is fixed. This is needed for dealing with backward assertions.
+In UTF8 mode, the result is in characters rather than bytes.
+
+Arguments:
+  code     points to the start of the pattern (the bracket)
+  options  the compiling options
+
+Returns:   the fixed length, or -1 if there is no fixed length,
+             or -2 if \C was encountered
+*/
+
+static int
+find_fixedlength(uschar *code, int options)
+{
+int length = -1;
+
+register int branchlength = 0;
+register uschar *cc = code + 1 + LINK_SIZE;
+
+/* Scan along the opcodes for this branch. If we get to the end of the
+branch, check the length against that of the other branches. */
+
+for (;;)
+  {
+  int d;
+  register int op = *cc;
+  if (op >= OP_BRA) op = OP_BRA;
+
+  switch (op)
+    {
+    case OP_BRA:
+    case OP_ONCE:
+    case OP_COND:
+    d = find_fixedlength(cc, options);
+    if (d < 0) return d;
+    branchlength += d;
+    do cc += GET(cc, 1); while (*cc == OP_ALT);
+    cc += 1 + LINK_SIZE;
+    break;
+
+    /* Reached end of a branch; if it's a ket it is the end of a nested
+    call. If it's ALT it is an alternation in a nested call. If it is
+    END it's the end of the outer call. All can be handled by the same code. */
+
+    case OP_ALT:
+    case OP_KET:
+    case OP_KETRMAX:
+    case OP_KETRMIN:
+    case OP_END:
+    if (length < 0) length = branchlength;
+      else if (length != branchlength) return -1;
+    if (*cc != OP_ALT) return length;
+    cc += 1 + LINK_SIZE;
+    branchlength = 0;
+    break;
+
+    /* Skip over assertive subpatterns */
+
+    case OP_ASSERT:
+    case OP_ASSERT_NOT:
+    case OP_ASSERTBACK:
+    case OP_ASSERTBACK_NOT:
+    do cc += GET(cc, 1); while (*cc == OP_ALT);
+    /* Fall through */
+
+    /* Skip over things that don't match chars */
+
+    case OP_REVERSE:
+    case OP_BRANUMBER:
+    case OP_CREF:
+    case OP_OPT:
+    case OP_CALLOUT:
+    case OP_SOD:
+    case OP_SOM:
+    case OP_EOD:
+    case OP_EODN:
+    case OP_CIRC:
+    case OP_DOLL:
+    case OP_NOT_WORD_BOUNDARY:
+    case OP_WORD_BOUNDARY:
+    cc += OP_lengths[*cc];
+    break;
+
+    /* Handle char strings. In UTF-8 mode we must count characters, not bytes.
+    This requires a scan of the string, unfortunately. We assume valid UTF-8
+    strings, so all we do is reduce the length by one for every byte whose bits
+    are 10xxxxxx. */
+
+    case OP_CHARS:
+    branchlength += *(++cc);
+#ifdef SUPPORT_UTF8
+    if ((options & PCRE_UTF8) != 0)
+      for (d = 1; d <= *cc; d++)
+        if ((cc[d] & 0xc0) == 0x80) branchlength--;
+#endif
+    cc += *cc + 1;
+    break;
+
+    /* Handle exact repetitions. The count is already in characters, but we
+    need to skip over a multibyte character in UTF8 mode.  */
+
+    case OP_EXACT:
+    branchlength += GET2(cc,1);
+    cc += 4;
+#ifdef SUPPORT_UTF8
+    if ((options & PCRE_UTF8) != 0)
+      {
+      while((*cc & 0x80) == 0x80) cc++;
+      }
+#endif
+    break;
+
+    case OP_TYPEEXACT:
+    branchlength += GET2(cc,1);
+    cc += 4;
+    break;
+
+    /* Handle single-char matchers */
+
+    case OP_NOT_DIGIT:
+    case OP_DIGIT:
+    case OP_NOT_WHITESPACE:
+    case OP_WHITESPACE:
+    case OP_NOT_WORDCHAR:
+    case OP_WORDCHAR:
+    case OP_ANY:
+    branchlength++;
+    cc++;
+    break;
+
+    /* The single-byte matcher isn't allowed */
+
+    case OP_ANYBYTE:
+    return -2;
+
+    /* Check a class for variable quantification */
+
+#ifdef SUPPORT_UTF8
+    case OP_XCLASS:
+    cc += GET(cc, 1) - 33;
+    /* Fall through */
+#endif
+
+    case OP_CLASS:
+    case OP_NCLASS:
+    cc += 33;
+
+    switch (*cc)
+      {
+      case OP_CRSTAR:
+      case OP_CRMINSTAR:
+      case OP_CRQUERY:
+      case OP_CRMINQUERY:
+      return -1;
+
+      case OP_CRRANGE:
+      case OP_CRMINRANGE:
+      if (GET2(cc,1) != GET2(cc,3)) return -1;
+      branchlength += GET2(cc,1);
+      cc += 5;
+      break;
+
+      default:
+      branchlength++;
+      }
+    break;
+
+    /* Anything else is variable length */
+
+    default:
+    return -1;
+    }
+  }
+/* Control never gets here */
+}
+
+
+
+
+/*************************************************
+*    Scan compiled regex for numbered bracket    *
+*************************************************/
+
+/* This little function scans through a compiled pattern until it finds a
+capturing bracket with the given number.
+
+Arguments:
+  code        points to start of expression
+  utf8        TRUE in UTF-8 mode
+  number      the required bracket number
+
+Returns:      pointer to the opcode for the bracket, or NULL if not found
+*/
+
+static const uschar *
+find_bracket(const uschar *code, BOOL utf8, int number)
+{
+#ifndef SUPPORT_UTF8
+utf8 = utf8;               /* Stop pedantic compilers complaining */
+#endif
+
+for (;;)
+  {
+  register int c = *code;
+  if (c == OP_END) return NULL;
+  else if (c == OP_CHARS) code += code[1] + OP_lengths[c];
+  else if (c > OP_BRA)
+    {
+    int n = c - OP_BRA;
+    if (n > EXTRACT_BASIC_MAX) n = GET2(code, 2+LINK_SIZE);
+    if (n == number) return (uschar *)code;
+    code += OP_lengths[OP_BRA];
+    }
+  else
+    {
+    code += OP_lengths[c];
+
+#ifdef SUPPORT_UTF8
+
+    /* In UTF-8 mode, opcodes that are followed by a character may be followed
+    by a multi-byte character. The length in the table is a minimum, so we have
+    to scan along to skip the extra characters. All opcodes are less than 128,
+    so we can use relatively efficient code. */
+
+    if (utf8) switch(c)
+      {
+      case OP_EXACT:
+      case OP_UPTO:
+      case OP_MINUPTO:
+      case OP_STAR:
+      case OP_MINSTAR:
+      case OP_PLUS:
+      case OP_MINPLUS:
+      case OP_QUERY:
+      case OP_MINQUERY:
+      while ((*code & 0xc0) == 0x80) code++;
+      break;
+
+      /* XCLASS is used for classes that cannot be represented just by a bit
+      map. This includes negated single high-valued characters. The length in
+      the table is zero; the actual length is stored in the compled code. */
+
+      case OP_XCLASS:
+      code += GET(code, 1) + 1;
+      break;
+      }
+#endif
+    }
+  }
+}
+
+
+
+/*************************************************
+*   Scan compiled regex for recursion reference  *
+*************************************************/
+
+/* This little function scans through a compiled pattern until it finds an
+instance of OP_RECURSE.
+
+Arguments:
+  code        points to start of expression
+  utf8        TRUE in UTF-8 mode
+
+Returns:      pointer to the opcode for OP_RECURSE, or NULL if not found
+*/
+
+static const uschar *
+find_recurse(const uschar *code, BOOL utf8)
+{
+#ifndef SUPPORT_UTF8
+utf8 = utf8;               /* Stop pedantic compilers complaining */
+#endif
+
+for (;;)
+  {
+  register int c = *code;
+  if (c == OP_END) return NULL;
+  else if (c == OP_RECURSE) return code;
+  else if (c == OP_CHARS) code += code[1] + OP_lengths[c];
+  else if (c > OP_BRA)
+    {
+    code += OP_lengths[OP_BRA];
+    }
+  else
+    {
+    code += OP_lengths[c];
+
+#ifdef SUPPORT_UTF8
+
+    /* In UTF-8 mode, opcodes that are followed by a character may be followed
+    by a multi-byte character. The length in the table is a minimum, so we have
+    to scan along to skip the extra characters. All opcodes are less than 128,
+    so we can use relatively efficient code. */
+
+    if (utf8) switch(c)
+      {
+      case OP_EXACT:
+      case OP_UPTO:
+      case OP_MINUPTO:
+      case OP_STAR:
+      case OP_MINSTAR:
+      case OP_PLUS:
+      case OP_MINPLUS:
+      case OP_QUERY:
+      case OP_MINQUERY:
+      while ((*code & 0xc0) == 0x80) code++;
+      break;
+
+      /* XCLASS is used for classes that cannot be represented just by a bit
+      map. This includes negated single high-valued characters. The length in
+      the table is zero; the actual length is stored in the compled code. */
+
+      case OP_XCLASS:
+      code += GET(code, 1) + 1;
+      break;
+      }
+#endif
+    }
+  }
+}
+
+
+
+/*************************************************
+*    Scan compiled branch for non-emptiness      *
+*************************************************/
+
+/* This function scans through a branch of a compiled pattern to see whether it
+can match the empty string or not. It is called only from could_be_empty()
+below. Note that first_significant_code() skips over assertions. If we hit an
+unclosed bracket, we return "empty" - this means we've struck an inner bracket
+whose current branch will already have been scanned.
+
+Arguments:
+  code        points to start of search
+  endcode     points to where to stop
+  utf8        TRUE if in UTF8 mode
+
+Returns:      TRUE if what is matched could be empty
+*/
+
+static BOOL
+could_be_empty_branch(const uschar *code, const uschar *endcode, BOOL utf8)
+{
+register int c;
+for (code = first_significant_code(code + 1 + LINK_SIZE, NULL, 0);
+     code < endcode;
+     code = first_significant_code(code + OP_lengths[c], NULL, 0))
+  {
+  const uschar *ccode;
+
+  c = *code;
+
+  if (c >= OP_BRA)
+    {
+    BOOL empty_branch;
+    if (GET(code, 1) == 0) return TRUE;    /* Hit unclosed bracket */
+
+    /* Scan a closed bracket */
+
+    empty_branch = FALSE;
+    do
+      {
+      if (!empty_branch && could_be_empty_branch(code, endcode, utf8))
+        empty_branch = TRUE;
+      code += GET(code, 1);
+      }
+    while (*code == OP_ALT);
+    if (!empty_branch) return FALSE;   /* All branches are non-empty */
+    code += 1 + LINK_SIZE;
+    c = *code;
+    }
+
+  else switch (c)
+    {
+    /* Check for quantifiers after a class */
+
+#ifdef SUPPORT_UTF8
+    case OP_XCLASS:
+    ccode = code + GET(code, 1);
+    goto CHECK_CLASS_REPEAT;
+#endif
+
+    case OP_CLASS:
+    case OP_NCLASS:
+    ccode = code + 33;
+
+#ifdef SUPPORT_UTF8
+    CHECK_CLASS_REPEAT:
+#endif
+
+    switch (*ccode)
+      {
+      case OP_CRSTAR:            /* These could be empty; continue */
+      case OP_CRMINSTAR:
+      case OP_CRQUERY:
+      case OP_CRMINQUERY:
+      break;
+
+      default:                   /* Non-repeat => class must match */
+      case OP_CRPLUS:            /* These repeats aren't empty */
+      case OP_CRMINPLUS:
+      return FALSE;
+
+      case OP_CRRANGE:
+      case OP_CRMINRANGE:
+      if (GET2(ccode, 1) > 0) return FALSE;  /* Minimum > 0 */
+      break;
+      }
+    break;
+
+    /* Opcodes that must match a character */
+
+    case OP_NOT_DIGIT:
+    case OP_DIGIT:
+    case OP_NOT_WHITESPACE:
+    case OP_WHITESPACE:
+    case OP_NOT_WORDCHAR:
+    case OP_WORDCHAR:
+    case OP_ANY:
+    case OP_ANYBYTE:
+    case OP_CHARS:
+    case OP_NOT:
+    case OP_PLUS:
+    case OP_MINPLUS:
+    case OP_EXACT:
+    case OP_NOTPLUS:
+    case OP_NOTMINPLUS:
+    case OP_NOTEXACT:
+    case OP_TYPEPLUS:
+    case OP_TYPEMINPLUS:
+    case OP_TYPEEXACT:
+    return FALSE;
+
+    /* End of branch */
+
+    case OP_KET:
+    case OP_KETRMAX:
+    case OP_KETRMIN:
+    case OP_ALT:
+    return TRUE;
+
+    /* In UTF-8 mode, STAR, MINSTAR, QUERY, MINQUERY, UPTO, and MINUPTO  may be
+    followed by a multibyte character */
+
+#ifdef SUPPORT_UTF8
+    case OP_STAR:
+    case OP_MINSTAR:
+    case OP_QUERY:
+    case OP_MINQUERY:
+    case OP_UPTO:
+    case OP_MINUPTO:
+    if (utf8) while ((code[2] & 0xc0) == 0x80) code++;
+    break;
+#endif
+    }
+  }
+
+return TRUE;
+}
+
+
+
+/*************************************************
+*    Scan compiled regex for non-emptiness       *
+*************************************************/
+
+/* This function is called to check for left recursive calls. We want to check
+the current branch of the current pattern to see if it could match the empty
+string. If it could, we must look outwards for branches at other levels,
+stopping when we pass beyond the bracket which is the subject of the recursion.
+
+Arguments:
+  code        points to start of the recursion
+  endcode     points to where to stop (current RECURSE item)
+  bcptr       points to the chain of current (unclosed) branch starts
+  utf8        TRUE if in UTF-8 mode
+
+Returns:      TRUE if what is matched could be empty
+*/
+
+static BOOL
+could_be_empty(const uschar *code, const uschar *endcode, branch_chain *bcptr,
+  BOOL utf8)
+{
+while (bcptr != NULL && bcptr->current >= code)
+  {
+  if (!could_be_empty_branch(bcptr->current, endcode, utf8)) return FALSE;
+  bcptr = bcptr->outer;
+  }
+return TRUE;
+}
+
+
+
+/*************************************************
+*           Check for POSIX class syntax         *
+*************************************************/
+
+/* This function is called when the sequence "[:" or "[." or "[=" is
+encountered in a character class. It checks whether this is followed by an
+optional ^ and then a sequence of letters, terminated by a matching ":]" or
+".]" or "=]".
+
+Argument:
+  ptr      pointer to the initial [
+  endptr   where to return the end pointer
+  cd       pointer to compile data
+
+Returns:   TRUE or FALSE
+*/
+
+static BOOL
+check_posix_syntax(const uschar *ptr, const uschar **endptr, compile_data *cd)
+{
+int terminator;          /* Don't combine these lines; the Solaris cc */
+terminator = *(++ptr);   /* compiler warns about "non-constant" initializer. */
+if (*(++ptr) == '^') ptr++;
+while ((cd->ctypes[*ptr] & ctype_letter) != 0) ptr++;
+if (*ptr == terminator && ptr[1] == ']')
+  {
+  *endptr = ptr;
+  return TRUE;
+  }
+return FALSE;
+}
+
+
+
+
+/*************************************************
+*          Check POSIX class name                *
+*************************************************/
+
+/* This function is called to check the name given in a POSIX-style class entry
+such as [:alnum:].
+
+Arguments:
+  ptr        points to the first letter
+  len        the length of the name
+
+Returns:     a value representing the name, or -1 if unknown
+*/
+
+static int
+check_posix_name(const uschar *ptr, int len)
+{
+register int yield = 0;
+while (posix_name_lengths[yield] != 0)
+  {
+  if (len == posix_name_lengths[yield] &&
+    strncmp((const char *)ptr, posix_names[yield], len) == 0) return yield;
+  yield++;
+  }
+return -1;
+}
+
+
+/*************************************************
+*    Adjust OP_RECURSE items in repeated group   *
+*************************************************/
+
+/* OP_RECURSE items contain an offset from the start of the regex to the group
+that is referenced. This means that groups can be replicated for fixed
+repetition simply by copying (because the recursion is allowed to refer to
+earlier groups that are outside the current group). However, when a group is
+optional (i.e. the minimum quantifier is zero), OP_BRAZERO is inserted before
+it, after it has been compiled. This means that any OP_RECURSE items within it
+that refer to the group itself or any contained groups have to have their
+offsets adjusted. That is the job of this function. Before it is called, the
+partially compiled regex must be temporarily terminated with OP_END.
+
+Arguments:
+  group      points to the start of the group
+  adjust     the amount by which the group is to be moved
+  utf8       TRUE in UTF-8 mode
+  cd         contains pointers to tables etc.
+
+Returns:     nothing
+*/
+
+static void
+adjust_recurse(uschar *group, int adjust, BOOL utf8, compile_data *cd)
+{
+uschar *ptr = group;
+while ((ptr = (uschar *)find_recurse(ptr, utf8)) != NULL)
+  {
+  int offset = GET(ptr, 1);
+  if (cd->start_code + offset >= group) PUT(ptr, 1, offset + adjust);
+  ptr += 1 + LINK_SIZE;
+  }
+}
+
+
+
+/*************************************************
+*           Compile one branch                   *
+*************************************************/
+
+/* Scan the pattern, compiling it into the code vector. If the options are
+changed during the branch, the pointer is used to change the external options
+bits.
+
+Arguments:
+  optionsptr     pointer to the option bits
+  brackets       points to number of extracting brackets used
+  code           points to the pointer to the current code point
+  ptrptr         points to the current pattern pointer
+  errorptr       points to pointer to error message
+  firstbyteptr   set to initial literal character, or < 0 (REQ_UNSET, REQ_NONE)
+  reqbyteptr     set to the last literal character required, else < 0
+  bcptr          points to current branch chain
+  cd             contains pointers to tables etc.
+
+Returns:         TRUE on success
+                 FALSE, with *errorptr set on error
+*/
+
+static BOOL
+compile_branch(int *optionsptr, int *brackets, uschar **codeptr,
+  const uschar **ptrptr, const char **errorptr, int *firstbyteptr,
+  int *reqbyteptr, branch_chain *bcptr, compile_data *cd)
+{
+int repeat_type, op_type;
+int repeat_min = 0, repeat_max = 0;      /* To please picky compilers */
+int bravalue = 0;
+int length;
+int greedy_default, greedy_non_default;
+int firstbyte, reqbyte;
+int zeroreqbyte, zerofirstbyte;
+int req_caseopt, reqvary, tempreqvary;
+int condcount = 0;
+int options = *optionsptr;
+register int c;
+register uschar *code = *codeptr;
+uschar *tempcode;
+BOOL inescq = FALSE;
+BOOL groupsetfirstbyte = FALSE;
+const uschar *ptr = *ptrptr;
+const uschar *tempptr;
+uschar *previous = NULL;
+uschar class[32];
+
+#ifdef SUPPORT_UTF8
+BOOL class_utf8;
+BOOL utf8 = (options & PCRE_UTF8) != 0;
+uschar *class_utf8data;
+uschar utf8_char[6];
+#else
+BOOL utf8 = FALSE;
+#endif
+
+/* Set up the default and non-default settings for greediness */
+
+greedy_default = ((options & PCRE_UNGREEDY) != 0);
+greedy_non_default = greedy_default ^ 1;
+
+/* Initialize no first char, no required char. REQ_UNSET means "no char
+matching encountered yet". It gets changed to REQ_NONE if we hit something that
+matches a non-fixed char first char; reqbyte just remains unset if we never
+find one.
+
+When we hit a repeat whose minimum is zero, we may have to adjust these values
+to take the zero repeat into account. This is implemented by setting them to
+zerofirstbyte and zeroreqbyte when such a repeat is encountered. The individual
+item types that can be repeated set these backoff variables appropriately. */
+
+firstbyte = reqbyte = zerofirstbyte = zeroreqbyte = REQ_UNSET;
+
+/* The variable req_caseopt contains either the REQ_CASELESS value or zero,
+according to the current setting of the caseless flag. REQ_CASELESS is a bit
+value > 255. It is added into the firstbyte or reqbyte variables to record the
+case status of the value. */
+
+req_caseopt = ((options & PCRE_CASELESS) != 0)? REQ_CASELESS : 0;
+
+/* Switch on next character until the end of the branch */
+
+for (;; ptr++)
+  {
+  BOOL negate_class;
+  BOOL possessive_quantifier;
+  int class_charcount;
+  int class_lastchar;
+  int newoptions;
+  int recno;
+  int skipbytes;
+  int subreqbyte;
+  int subfirstbyte;
+
+  c = *ptr;
+  if (inescq && c != 0) goto NORMAL_CHAR;
+
+  if ((options & PCRE_EXTENDED) != 0)
+    {
+    if ((cd->ctypes[c] & ctype_space) != 0) continue;
+    if (c == '#')
+      {
+      /* The space before the ; is to avoid a warning on a silly compiler
+      on the Macintosh. */
+      while ((c = *(++ptr)) != 0 && c != NEWLINE) ;
+      if (c != 0) continue;   /* Else fall through to handle end of string */
+      }
+    }
+
+  switch(c)
+    {
+    /* The branch terminates at end of string, |, or ). */
+
+    case 0:
+    case '|':
+    case ')':
+    *firstbyteptr = firstbyte;
+    *reqbyteptr = reqbyte;
+    *codeptr = code;
+    *ptrptr = ptr;
+    return TRUE;
+
+    /* Handle single-character metacharacters. In multiline mode, ^ disables
+    the setting of any following char as a first character. */
+
+    case '^':
+    if ((options & PCRE_MULTILINE) != 0)
+      {
+      if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;
+      }
+    previous = NULL;
+    *code++ = OP_CIRC;
+    break;
+
+    case '$':
+    previous = NULL;
+    *code++ = OP_DOLL;
+    break;
+
+    /* There can never be a first char if '.' is first, whatever happens about
+    repeats. The value of reqbyte doesn't change either. */
+
+    case '.':
+    if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;
+    zerofirstbyte = firstbyte;
+    zeroreqbyte = reqbyte;
+    previous = code;
+    *code++ = OP_ANY;
+    break;
+
+    /* Character classes. If the included characters are all < 255 in value, we
+    build a 32-byte bitmap of the permitted characters, except in the special
+    case where there is only one such character. For negated classes, we build
+    the map as usual, then invert it at the end. However, we use a different
+    opcode so that data characters > 255 can be handled correctly.
+
+    If the class contains characters outside the 0-255 range, a different
+    opcode is compiled. It may optionally have a bit map for characters < 256,
+    but those above are are explicitly listed afterwards. A flag byte tells
+    whether the bitmap is present, and whether this is a negated class or not.
+    */
+
+    case '[':
+    previous = code;
+
+    /* PCRE supports POSIX class stuff inside a class. Perl gives an error if
+    they are encountered at the top level, so we'll do that too. */
+
+    if ((ptr[1] == ':' || ptr[1] == '.' || ptr[1] == '=') &&
+        check_posix_syntax(ptr, &tempptr, cd))
+      {
+      *errorptr = (ptr[1] == ':')? ERR13 : ERR31;
+      goto FAILED;
+      }
+
+    /* If the first character is '^', set the negation flag and skip it. */
+
+    if ((c = *(++ptr)) == '^')
+      {
+      negate_class = TRUE;
+      c = *(++ptr);
+      }
+    else
+      {
+      negate_class = FALSE;
+      }
+
+    /* Keep a count of chars with values < 256 so that we can optimize the case
+    of just a single character (as long as it's < 256). For higher valued UTF-8
+    characters, we don't yet do any optimization. */
+
+    class_charcount = 0;
+    class_lastchar = -1;
+
+#ifdef SUPPORT_UTF8
+    class_utf8 = FALSE;                       /* No chars >= 256 */
+    class_utf8data = code + LINK_SIZE + 34;   /* For UTF-8 items */
+#endif
+
+    /* Initialize the 32-char bit map to all zeros. We have to build the
+    map in a temporary bit of store, in case the class contains only 1
+    character (< 256), because in that case the compiled code doesn't use the
+    bit map. */
+
+    memset(class, 0, 32 * sizeof(uschar));
+
+    /* Process characters until ] is reached. By writing this as a "do" it
+    means that an initial ] is taken as a data character. The first pass
+    through the regex checked the overall syntax, so we don't need to be very
+    strict here. At the start of the loop, c contains the first byte of the
+    character. */
+
+    do
+      {
+#ifdef SUPPORT_UTF8
+      if (utf8 && c > 127)
+        {                           /* Braces are required because the */
+        GETCHARLEN(c, ptr, ptr);    /* macro generates multiple statements */
+        }
+#endif
+
+      /* Inside \Q...\E everything is literal except \E */
+
+      if (inescq)
+        {
+        if (c == '\\' && ptr[1] == 'E')
+          {
+          inescq = FALSE;
+          ptr++;
+          continue;
+          }
+        else goto LONE_SINGLE_CHARACTER;
+        }
+
+      /* Handle POSIX class names. Perl allows a negation extension of the
+      form [:^name:]. A square bracket that doesn't match the syntax is
+      treated as a literal. We also recognize the POSIX constructions
+      [.ch.] and [=ch=] ("collating elements") and fault them, as Perl
+      5.6 and 5.8 do. */
+
+      if (c == '[' &&
+          (ptr[1] == ':' || ptr[1] == '.' || ptr[1] == '=') &&
+          check_posix_syntax(ptr, &tempptr, cd))
+        {
+        BOOL local_negate = FALSE;
+        int posix_class, i;
+        register const uschar *cbits = cd->cbits;
+
+        if (ptr[1] != ':')
+          {
+          *errorptr = ERR31;
+          goto FAILED;
+          }
+
+        ptr += 2;
+        if (*ptr == '^')
+          {
+          local_negate = TRUE;
+          ptr++;
+          }
+
+        posix_class = check_posix_name(ptr, tempptr - ptr);
+        if (posix_class < 0)
+          {
+          *errorptr = ERR30;
+          goto FAILED;
+          }
+
+        /* If matching is caseless, upper and lower are converted to
+        alpha. This relies on the fact that the class table starts with
+        alpha, lower, upper as the first 3 entries. */
+
+        if ((options & PCRE_CASELESS) != 0 && posix_class <= 2)
+          posix_class = 0;
+
+        /* Or into the map we are building up to 3 of the static class
+        tables, or their negations. The [:blank:] class sets up the same
+        chars as the [:space:] class (all white space). We remove the vertical
+        white space chars afterwards. */
+
+        posix_class *= 3;
+        for (i = 0; i < 3; i++)
+          {
+          BOOL blankclass = strncmp((char *)ptr, "blank", 5) == 0;
+          int taboffset = posix_class_maps[posix_class + i];
+          if (taboffset < 0) break;
+          if (local_negate)
+            {
+            for (c = 0; c < 32; c++) class[c] |= ~cbits[c+taboffset];
+            if (blankclass) class[1] |= 0x3c;
+            }
+          else
+            {
+            for (c = 0; c < 32; c++) class[c] |= cbits[c+taboffset];
+            if (blankclass) class[1] &= ~0x3c;
+            }
+          }
+
+        ptr = tempptr + 1;
+        class_charcount = 10;  /* Set > 1; assumes more than 1 per class */
+        continue;    /* End of POSIX syntax handling */
+        }
+
+      /* Backslash may introduce a single character, or it may introduce one
+      of the specials, which just set a flag. Escaped items are checked for
+      validity in the pre-compiling pass. The sequence \b is a special case.
+      Inside a class (and only there) it is treated as backspace. Elsewhere
+      it marks a word boundary. Other escapes have preset maps ready to
+      or into the one we are building. We assume they have more than one
+      character in them, so set class_charcount bigger than one. */
+
+      if (c == '\\')
+        {
+        c = check_escape(&ptr, errorptr, *brackets, options, TRUE);
+        if (-c == ESC_b) c = '\b';  /* \b is backslash in a class */
+
+        if (-c == ESC_Q)            /* Handle start of quoted string */
+          {
+          if (ptr[1] == '\\' && ptr[2] == 'E')
+            {
+            ptr += 2; /* avoid empty string */
+            }
+          else inescq = TRUE;
+          continue;
+          }
+
+        else if (c < 0)
+          {
+          register const uschar *cbits = cd->cbits;
+          class_charcount = 10;     /* Greater than 1 is what matters */
+          switch (-c)
+            {
+            case ESC_d:
+            for (c = 0; c < 32; c++) class[c] |= cbits[c+cbit_digit];
+            continue;
+
+            case ESC_D:
+            for (c = 0; c < 32; c++) class[c] |= ~cbits[c+cbit_digit];
+            continue;
+
+            case ESC_w:
+            for (c = 0; c < 32; c++) class[c] |= cbits[c+cbit_word];
+            continue;
+
+            case ESC_W:
+            for (c = 0; c < 32; c++) class[c] |= ~cbits[c+cbit_word];
+            continue;
+
+            case ESC_s:
+            for (c = 0; c < 32; c++) class[c] |= cbits[c+cbit_space];
+            class[1] &= ~0x08;   /* Perl 5.004 onwards omits VT from \s */
+            continue;
+
+            case ESC_S:
+            for (c = 0; c < 32; c++) class[c] |= ~cbits[c+cbit_space];
+            class[1] |= 0x08;    /* Perl 5.004 onwards omits VT from \s */
+            continue;
+
+            /* Unrecognized escapes are faulted if PCRE is running in its
+            strict mode. By default, for compatibility with Perl, they are
+            treated as literals. */
+
+            default:
+            if ((options & PCRE_EXTRA) != 0)
+              {
+              *errorptr = ERR7;
+              goto FAILED;
+              }
+            c = *ptr;    /* The final character */
+            }
+          }
+
+        /* Fall through if we have a single character (c >= 0). This may be
+        > 256 in UTF-8 mode. */
+
+        }   /* End of backslash handling */
+
+      /* A single character may be followed by '-' to form a range. However,
+      Perl does not permit ']' to be the end of the range. A '-' character
+      here is treated as a literal. */
+
+      if (ptr[1] == '-' && ptr[2] != ']')
+        {
+        int d;
+        ptr += 2;
+
+#ifdef SUPPORT_UTF8
+        if (utf8)
+          {                           /* Braces are required because the */
+          GETCHARLEN(d, ptr, ptr);    /* macro generates multiple statements */
+          }
+        else
+#endif
+        d = *ptr;
+
+        /* The second part of a range can be a single-character escape, but
+        not any of the other escapes. Perl 5.6 treats a hyphen as a literal
+        in such circumstances. */
+
+        if (d == '\\')
+          {
+          const uschar *oldptr = ptr;
+          d = check_escape(&ptr, errorptr, *brackets, options, TRUE);
+
+          /* \b is backslash; any other special means the '-' was literal */
+
+          if (d < 0)
+            {
+            if (d == -ESC_b) d = '\b'; else
+              {
+              ptr = oldptr - 2;
+              goto LONE_SINGLE_CHARACTER;  /* A few lines below */
+              }
+            }
+          }
+
+        /* Check that the two values are in the correct order */
+
+        if (d < c)
+          {
+          *errorptr = ERR8;
+          goto FAILED;
+          }
+
+        /* If d is greater than 255, we can't just use the bit map, so set up
+        for the UTF-8 supporting class type. If we are not caseless, we can
+        just set up a single range. If we are caseless, the characters < 256
+        are handled with a bitmap, in order to get the case-insensitive
+        handling. */
+
+#ifdef SUPPORT_UTF8
+        if (d > 255)
+          {
+          class_utf8 = TRUE;
+          *class_utf8data++ = XCL_RANGE;
+          if ((options & PCRE_CASELESS) == 0)
+            {
+            class_utf8data += ord2utf8(c, class_utf8data);
+            class_utf8data += ord2utf8(d, class_utf8data);
+            continue;  /* Go get the next char in the class */
+            }
+          class_utf8data += ord2utf8(256, class_utf8data);
+          class_utf8data += ord2utf8(d, class_utf8data);
+          d = 255;
+          /* Fall through */
+          }
+#endif
+        /* We use the bit map if the range is entirely < 255, or if part of it
+        is < 255 and matching is caseless. */
+
+        for (; c <= d; c++)
+          {
+          class[c/8] |= (1 << (c&7));
+          if ((options & PCRE_CASELESS) != 0)
+            {
+            int uc = cd->fcc[c];           /* flip case */
+            class[uc/8] |= (1 << (uc&7));
+            }
+          class_charcount++;                /* in case a one-char range */
+          class_lastchar = c;
+          }
+
+        continue;   /* Go get the next char in the class */
+        }
+
+      /* Handle a lone single character - we can get here for a normal
+      non-escape char, or after \ that introduces a single character. */
+
+      LONE_SINGLE_CHARACTER:
+
+      /* Handle a multibyte character */
+
+#ifdef SUPPORT_UTF8
+      if (utf8 && c > 255)
+        {
+        class_utf8 = TRUE;
+        *class_utf8data++ = XCL_SINGLE;
+        class_utf8data += ord2utf8(c, class_utf8data);
+        }
+      else
+#endif
+      /* Handle a single-byte character */
+        {
+        class [c/8] |= (1 << (c&7));
+        if ((options & PCRE_CASELESS) != 0)
+          {
+          c = cd->fcc[c];   /* flip case */
+          class[c/8] |= (1 << (c&7));
+          }
+        class_charcount++;
+        class_lastchar = c;
+        }
+      }
+
+    /* Loop until ']' reached; the check for end of string happens inside the
+    loop. This "while" is the end of the "do" above. */
+
+    while ((c = *(++ptr)) != ']' || inescq);
+
+    /* If class_charcount is 1, we saw precisely one character with a value <
+    256. In UTF-8 mode, we can optimize if there were no characters >= 256 and
+    the one character is < 128. In non-UTF-8 mode we can always optimize.
+
+    The optimization throws away the bit map. We turn the item into a
+    1-character OP_CHARS if it's positive, or OP_NOT if it's negative. Note
+    that OP_NOT does not support multibyte characters. In the positive case, it
+    can cause firstbyte to be set. Otherwise, there can be no first char if
+    this item is first, whatever repeat count may follow. In the case of
+    reqbyte, save the previous value for reinstating. */
+
+#ifdef SUPPORT_UTF8
+    if (class_charcount == 1 &&
+          (!utf8 ||
+          (!class_utf8 && class_lastchar < 128)))
+#else
+    if (class_charcount == 1)
+#endif
+      {
+      zeroreqbyte = reqbyte;
+      if (negate_class)
+        {
+        if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;
+        zerofirstbyte = firstbyte;
+        *code++ = OP_NOT;
+        }
+      else
+        {
+        if (firstbyte == REQ_UNSET)
+          {
+          zerofirstbyte = REQ_NONE;
+          firstbyte = class_lastchar | req_caseopt;
+          }
+        else
+          {
+          zerofirstbyte = firstbyte;
+          reqbyte = class_lastchar | req_caseopt | cd->req_varyopt;
+          }
+        *code++ = OP_CHARS;
+        *code++ = 1;
+        }
+      *code++ = class_lastchar;
+      break;  /* End of class handling */
+      }       /* End of 1-byte optimization */
+
+    /* Otherwise, if this is the first thing in the branch, there can be no
+    first char setting, whatever the repeat count. Any reqbyte setting must
+    remain unchanged after any kind of repeat. */
+
+    if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;
+    zerofirstbyte = firstbyte;
+    zeroreqbyte = reqbyte;
+
+    /* If there are characters with values > 255, we have to compile an
+    extended class, with its own opcode. If there are no characters < 256,
+    we can omit the bitmap. */
+
+#ifdef SUPPORT_UTF8
+    if (class_utf8)
+      {
+      *class_utf8data++ = XCL_END;    /* Marks the end of extra data */
+      *code++ = OP_XCLASS;
+      code += LINK_SIZE;
+      *code = negate_class? XCL_NOT : 0;
+
+      /* If the map is required, install it, and move on to the end of
+      the extra data */
+
+      if (class_charcount > 0)
+        {
+        *code++ |= XCL_MAP;
+        memcpy(code, class, 32);
+        code = class_utf8data;
+        }
+
+      /* If the map is not required, slide down the extra data. */
+
+      else
+        {
+        int len = class_utf8data - (code + 33);
+        memmove(code + 1, code + 33, len);
+        code += len + 1;
+        }
+
+      /* Now fill in the complete length of the item */
+
+      PUT(previous, 1, code - previous);
+      break;   /* End of class handling */
+      }
+#endif
+
+    /* If there are no characters > 255, negate the 32-byte map if necessary,
+    and copy it into the code vector. If this is the first thing in the branch,
+    there can be no first char setting, whatever the repeat count. Any reqbyte
+    setting must remain unchanged after any kind of repeat. */
+
+    if (negate_class)
+      {
+      *code++ = OP_NCLASS;
+      for (c = 0; c < 32; c++) code[c] = ~class[c];
+      }
+    else
+      {
+      *code++ = OP_CLASS;
+      memcpy(code, class, 32);
+      }
+    code += 32;
+    break;
+
+    /* Various kinds of repeat */
+
+    case '{':
+    if (!is_counted_repeat(ptr+1)) goto NORMAL_CHAR;
+    ptr = read_repeat_counts(ptr+1, &repeat_min, &repeat_max, errorptr);
+    if (*errorptr != NULL) goto FAILED;
+    goto REPEAT;
+
+    case '*':
+    repeat_min = 0;
+    repeat_max = -1;
+    goto REPEAT;
+
+    case '+':
+    repeat_min = 1;
+    repeat_max = -1;
+    goto REPEAT;
+
+    case '?':
+    repeat_min = 0;
+    repeat_max = 1;
+
+    REPEAT:
+    if (previous == NULL)
+      {
+      *errorptr = ERR9;
+      goto FAILED;
+      }
+
+    if (repeat_min == 0)
+      {
+      firstbyte = zerofirstbyte;    /* Adjust for zero repeat */
+      reqbyte = zeroreqbyte;        /* Ditto */
+      }
+
+    /* Remember whether this is a variable length repeat */
+
+    reqvary = (repeat_min == repeat_max)? 0 : REQ_VARY;
+
+    op_type = 0;                    /* Default single-char op codes */
+    possessive_quantifier = FALSE;  /* Default not possessive quantifier */
+
+    /* Save start of previous item, in case we have to move it up to make space
+    for an inserted OP_ONCE for the additional '+' extension. */
+
+    tempcode = previous;
+
+    /* If the next character is '+', we have a possessive quantifier. This
+    implies greediness, whatever the setting of the PCRE_UNGREEDY option.
+    If the next character is '?' this is a minimizing repeat, by default,
+    but if PCRE_UNGREEDY is set, it works the other way round. We change the
+    repeat type to the non-default. */
+
+    if (ptr[1] == '+')
+      {
+      repeat_type = 0;                  /* Force greedy */
+      possessive_quantifier = TRUE;
+      ptr++;
+      }
+    else if (ptr[1] == '?')
+      {
+      repeat_type = greedy_non_default;
+      ptr++;
+      }
+    else repeat_type = greedy_default;
+
+    /* If previous was a recursion, we need to wrap it inside brackets so that
+    it can be replicated if necessary. */
+
+    if (*previous == OP_RECURSE)
+      {
+      memmove(previous + 1 + LINK_SIZE, previous, 1 + LINK_SIZE);
+      code += 1 + LINK_SIZE;
+      *previous = OP_BRA;
+      PUT(previous, 1, code - previous);
+      *code = OP_KET;
+      PUT(code, 1, code - previous);
+      code += 1 + LINK_SIZE;
+      }
+
+    /* If previous was a string of characters, chop off the last one and use it
+    as the subject of the repeat. If there was only one character, we can
+    abolish the previous item altogether. If a one-char item has a minumum of
+    more than one, ensure that it is set in reqbyte - it might not be if a
+    sequence such as x{3} is the first thing in a branch because the x will
+    have gone into firstbyte instead.  */
+
+    if (*previous == OP_CHARS)
+      {
+      /* Deal with UTF-8 characters that take up more than one byte. It's
+      easier to write this out separately than try to macrify it. Use c to
+      hold the length of the character in bytes, plus 0x80 to flag that it's a
+      length rather than a small character. */
+
+#ifdef SUPPORT_UTF8
+      if (utf8 && (code[-1] & 0x80) != 0)
+        {
+        uschar *lastchar = code - 1;
+        while((*lastchar & 0xc0) == 0x80) lastchar--;
+        c = code - lastchar;            /* Length of UTF-8 character */
+        memcpy(utf8_char, lastchar, c); /* Save the char */
+        if (lastchar == previous + 2)   /* There was only one character */
+          {
+          code = previous;              /* Abolish the previous item */
+          }
+        else
+          {
+          previous[1] -= c;             /* Adjust length of previous */
+          code = lastchar;              /* Lost char off the end */
+          tempcode = code;              /* Adjust position to be moved for '+' */
+          }
+        c |= 0x80;                      /* Flag c as a length */
+        }
+      else
+#endif
+
+      /* Handle the case of a single byte - either with no UTF8 support, or
+      with UTF-8 disabled, or for a UTF-8 character < 128. */
+
+        {
+        c = *(--code);
+        if (code == previous + 2)   /* There was only one character */
+          {
+          code = previous;              /* Abolish the previous item */
+          if (repeat_min > 1) reqbyte = c | req_caseopt | cd->req_varyopt;
+          }
+        else
+          {
+          previous[1]--;             /* adjust length */
+          tempcode = code;           /* Adjust position to be moved for '+' */
+          }
+        }
+
+      goto OUTPUT_SINGLE_REPEAT;   /* Code shared with single character types */
+      }
+
+    /* If previous was a single negated character ([^a] or similar), we use
+    one of the special opcodes, replacing it. The code is shared with single-
+    character repeats by setting opt_type to add a suitable offset into
+    repeat_type. OP_NOT is currently used only for single-byte chars. */
+
+    else if (*previous == OP_NOT)
+      {
+      op_type = OP_NOTSTAR - OP_STAR;  /* Use "not" opcodes */
+      c = previous[1];
+      code = previous;
+      goto OUTPUT_SINGLE_REPEAT;
+      }
+
+    /* If previous was a character type match (\d or similar), abolish it and
+    create a suitable repeat item. The code is shared with single-character
+    repeats by setting op_type to add a suitable offset into repeat_type. */
+
+    else if (*previous < OP_EODN)
+      {
+      op_type = OP_TYPESTAR - OP_STAR;  /* Use type opcodes */
+      c = *previous;
+      code = previous;
+
+      OUTPUT_SINGLE_REPEAT:
+
+      /* If the maximum is zero then the minimum must also be zero; Perl allows
+      this case, so we do too - by simply omitting the item altogether. */
+
+      if (repeat_max == 0) goto END_REPEAT;
+
+      /* Combine the op_type with the repeat_type */
+
+      repeat_type += op_type;
+
+      /* A minimum of zero is handled either as the special case * or ?, or as
+      an UPTO, with the maximum given. */
+
+      if (repeat_min == 0)
+        {
+        if (repeat_max == -1) *code++ = OP_STAR + repeat_type;
+          else if (repeat_max == 1) *code++ = OP_QUERY + repeat_type;
+        else
+          {
+          *code++ = OP_UPTO + repeat_type;
+          PUT2INC(code, 0, repeat_max);
+          }
+        }
+
+      /* The case {1,} is handled as the special case + */
+
+      else if (repeat_min == 1 && repeat_max == -1)
+        *code++ = OP_PLUS + repeat_type;
+
+      /* The case {n,n} is just an EXACT, while the general case {n,m} is
+      handled as an EXACT followed by an UPTO. An EXACT of 1 is optimized. */
+
+      else
+        {
+        if (repeat_min != 1)
+          {
+          *code++ = OP_EXACT + op_type;  /* NB EXACT doesn't have repeat_type */
+          PUT2INC(code, 0, repeat_min);
+          }
+
+        /* If the mininum is 1 and the previous item was a character string,
+        we either have to put back the item that got cancelled if the string
+        length was 1, or add the character back onto the end of a longer
+        string. For a character type nothing need be done; it will just get
+        put back naturally. Note that the final character is always going to
+        get added below, so we leave code ready for its insertion. */
+
+        else if (*previous == OP_CHARS)
+          {
+          if (code == previous) code += 2; else
+
+          /* In UTF-8 mode, a multibyte char has its length in c, with the 0x80
+          bit set as a flag. The length will always be between 2 and 6. */
+
+#ifdef SUPPORT_UTF8
+          if (utf8 && c >= 128) previous[1] += c & 7; else
+#endif
+          previous[1]++;
+          }
+
+        /*  For a single negated character we also have to put back the
+        item that got cancelled. At present this applies only to single byte
+        characters in any mode. */
+
+        else if (*previous == OP_NOT) code++;
+
+        /* If the maximum is unlimited, insert an OP_STAR. Before doing so,
+        we have to insert the character for the previous code. In UTF-8 mode,
+        long characters have their length in c, with the 0x80 bit as a flag. */
+
+        if (repeat_max < 0)
+          {
+#ifdef SUPPORT_UTF8
+          if (utf8 && c >= 128)
+            {
+            memcpy(code, utf8_char, c & 7);
+            code += c & 7;
+            }
+          else
+#endif
+          *code++ = c;
+          *code++ = OP_STAR + repeat_type;
+          }
+
+        /* Else insert an UPTO if the max is greater than the min, again
+        preceded by the character, for the previously inserted code. */
+
+        else if (repeat_max != repeat_min)
+          {
+#ifdef SUPPORT_UTF8
+          if (utf8 && c >= 128)
+            {
+            memcpy(code, utf8_char, c & 7);
+            code += c & 7;
+            }
+          else
+#endif
+          *code++ = c;
+          repeat_max -= repeat_min;
+          *code++ = OP_UPTO + repeat_type;
+          PUT2INC(code, 0, repeat_max);
+          }
+        }
+
+      /* The character or character type itself comes last in all cases. */
+
+#ifdef SUPPORT_UTF8
+      if (utf8 && c >= 128)
+        {
+        memcpy(code, utf8_char, c & 7);
+        code += c & 7;
+        }
+      else
+#endif
+
+      *code++ = c;
+      }
+
+    /* If previous was a character class or a back reference, we put the repeat
+    stuff after it, but just skip the item if the repeat was {0,0}. */
+
+    else if (*previous == OP_CLASS ||
+             *previous == OP_NCLASS ||
+#ifdef SUPPORT_UTF8
+             *previous == OP_XCLASS ||
+#endif
+             *previous == OP_REF)
+      {
+      if (repeat_max == 0)
+        {
+        code = previous;
+        goto END_REPEAT;
+        }
+      if (repeat_min == 0 && repeat_max == -1)
+        *code++ = OP_CRSTAR + repeat_type;
+      else if (repeat_min == 1 && repeat_max == -1)
+        *code++ = OP_CRPLUS + repeat_type;
+      else if (repeat_min == 0 && repeat_max == 1)
+        *code++ = OP_CRQUERY + repeat_type;
+      else
+        {
+        *code++ = OP_CRRANGE + repeat_type;
+        PUT2INC(code, 0, repeat_min);
+        if (repeat_max == -1) repeat_max = 0;  /* 2-byte encoding for max */
+        PUT2INC(code, 0, repeat_max);
+        }
+      }
+
+    /* If previous was a bracket group, we may have to replicate it in certain
+    cases. */
+
+    else if (*previous >= OP_BRA || *previous == OP_ONCE ||
+             *previous == OP_COND)
+      {
+      register int i;
+      int ketoffset = 0;
+      int len = code - previous;
+      uschar *bralink = NULL;
+
+      /* If the maximum repeat count is unlimited, find the end of the bracket
+      by scanning through from the start, and compute the offset back to it
+      from the current code pointer. There may be an OP_OPT setting following
+      the final KET, so we can't find the end just by going back from the code
+      pointer. */
+
+      if (repeat_max == -1)
+        {
+        register uschar *ket = previous;
+        do ket += GET(ket, 1); while (*ket != OP_KET);
+        ketoffset = code - ket;
+        }
+
+      /* The case of a zero minimum is special because of the need to stick
+      OP_BRAZERO in front of it, and because the group appears once in the
+      data, whereas in other cases it appears the minimum number of times. For
+      this reason, it is simplest to treat this case separately, as otherwise
+      the code gets far too messy. There are several special subcases when the
+      minimum is zero. */
+
+      if (repeat_min == 0)
+        {
+        /* If the maximum is also zero, we just omit the group from the output
+        altogether. */
+
+        if (repeat_max == 0)
+          {
+          code = previous;
+          goto END_REPEAT;
+          }
+
+        /* If the maximum is 1 or unlimited, we just have to stick in the
+        BRAZERO and do no more at this point. However, we do need to adjust
+        any OP_RECURSE calls inside the group that refer to the group itself or
+        any internal group, because the offset is from the start of the whole
+        regex. Temporarily terminate the pattern while doing this. */
+
+        if (repeat_max <= 1)
+          {
+          *code = OP_END;
+          adjust_recurse(previous, 1, utf8, cd);
+          memmove(previous+1, previous, len);
+          code++;
+          *previous++ = OP_BRAZERO + repeat_type;
+          }
+
+        /* If the maximum is greater than 1 and limited, we have to replicate
+        in a nested fashion, sticking OP_BRAZERO before each set of brackets.
+        The first one has to be handled carefully because it's the original
+        copy, which has to be moved up. The remainder can be handled by code
+        that is common with the non-zero minimum case below. We have to
+        adjust the value or repeat_max, since one less copy is required. Once
+        again, we may have to adjust any OP_RECURSE calls inside the group. */
+
+        else
+          {
+          int offset;
+          *code = OP_END;
+          adjust_recurse(previous, 2 + LINK_SIZE, utf8, cd);
+          memmove(previous + 2 + LINK_SIZE, previous, len);
+          code += 2 + LINK_SIZE;
+          *previous++ = OP_BRAZERO + repeat_type;
+          *previous++ = OP_BRA;
+
+          /* We chain together the bracket offset fields that have to be
+          filled in later when the ends of the brackets are reached. */
+
+          offset = (bralink == NULL)? 0 : previous - bralink;
+          bralink = previous;
+          PUTINC(previous, 0, offset);
+          }
+
+        repeat_max--;
+        }
+
+      /* If the minimum is greater than zero, replicate the group as many
+      times as necessary, and adjust the maximum to the number of subsequent
+      copies that we need. If we set a first char from the group, and didn't
+      set a required char, copy the latter from the former. */
+
+      else
+        {
+        if (repeat_min > 1)
+          {
+          if (groupsetfirstbyte && reqbyte < 0) reqbyte = firstbyte;
+          for (i = 1; i < repeat_min; i++)
+            {
+            memcpy(code, previous, len);
+            code += len;
+            }
+          }
+        if (repeat_max > 0) repeat_max -= repeat_min;
+        }
+
+      /* This code is common to both the zero and non-zero minimum cases. If
+      the maximum is limited, it replicates the group in a nested fashion,
+      remembering the bracket starts on a stack. In the case of a zero minimum,
+      the first one was set up above. In all cases the repeat_max now specifies
+      the number of additional copies needed. */
+
+      if (repeat_max >= 0)
+        {
+        for (i = repeat_max - 1; i >= 0; i--)
+          {
+          *code++ = OP_BRAZERO + repeat_type;
+
+          /* All but the final copy start a new nesting, maintaining the
+          chain of brackets outstanding. */
+
+          if (i != 0)
+            {
+            int offset;
+            *code++ = OP_BRA;
+            offset = (bralink == NULL)? 0 : code - bralink;
+            bralink = code;
+            PUTINC(code, 0, offset);
+            }
+
+          memcpy(code, previous, len);
+          code += len;
+          }
+
+        /* Now chain through the pending brackets, and fill in their length
+        fields (which are holding the chain links pro tem). */
+
+        while (bralink != NULL)
+          {
+          int oldlinkoffset;
+          int offset = code - bralink + 1;
+          uschar *bra = code - offset;
+          oldlinkoffset = GET(bra, 1);
+          bralink = (oldlinkoffset == 0)? NULL : bralink - oldlinkoffset;
+          *code++ = OP_KET;
+          PUTINC(code, 0, offset);
+          PUT(bra, 1, offset);
+          }
+        }
+
+      /* If the maximum is unlimited, set a repeater in the final copy. We
+      can't just offset backwards from the current code point, because we
+      don't know if there's been an options resetting after the ket. The
+      correct offset was computed above. */
+
+      else code[-ketoffset] = OP_KETRMAX + repeat_type;
+      }
+
+    /* Else there's some kind of shambles */
+
+    else
+      {
+      *errorptr = ERR11;
+      goto FAILED;
+      }
+
+    /* If the character following a repeat is '+', we wrap the entire repeated
+    item inside OP_ONCE brackets. This is just syntactic sugar, taken from
+    Sun's Java package. The repeated item starts at tempcode, not at previous,
+    which might be the first part of a string whose (former) last char we
+    repeated. However, we don't support '+' after a greediness '?'. */
+
+    if (possessive_quantifier)
+      {
+      int len = code - tempcode;
+      memmove(tempcode + 1+LINK_SIZE, tempcode, len);
+      code += 1 + LINK_SIZE;
+      len += 1 + LINK_SIZE;
+      tempcode[0] = OP_ONCE;
+      *code++ = OP_KET;
+      PUTINC(code, 0, len);
+      PUT(tempcode, 1, len);
+      }
+
+    /* In all case we no longer have a previous item. We also set the
+    "follows varying string" flag for subsequently encountered reqbytes if
+    it isn't already set and we have just passed a varying length item. */
+
+    END_REPEAT:
+    previous = NULL;
+    cd->req_varyopt |= reqvary;
+    break;
+
+
+    /* Start of nested bracket sub-expression, or comment or lookahead or
+    lookbehind or option setting or condition. First deal with special things
+    that can come after a bracket; all are introduced by ?, and the appearance
+    of any of them means that this is not a referencing group. They were
+    checked for validity in the first pass over the string, so we don't have to
+    check for syntax errors here.  */
+
+    case '(':
+    newoptions = options;
+    skipbytes = 0;
+
+    if (*(++ptr) == '?')
+      {
+      int set, unset;
+      int *optset;
+
+      switch (*(++ptr))
+        {
+        case '#':                 /* Comment; skip to ket */
+        ptr++;
+        while (*ptr != ')') ptr++;
+        continue;
+
+        case ':':                 /* Non-extracting bracket */
+        bravalue = OP_BRA;
+        ptr++;
+        break;
+
+        case '(':
+        bravalue = OP_COND;       /* Conditional group */
+
+        /* Condition to test for recursion */
+
+        if (ptr[1] == 'R')
+          {
+          code[1+LINK_SIZE] = OP_CREF;
+          PUT2(code, 2+LINK_SIZE, CREF_RECURSE);
+          skipbytes = 3;
+          ptr += 3;
+          }
+
+        /* Condition to test for a numbered subpattern match. We know that
+        if a digit follows ( then there will just be digits until ) because
+        the syntax was checked in the first pass. */
+
+        else if ((digitab[ptr[1]] && ctype_digit) != 0)
+          {
+          int condref;                 /* Don't amalgamate; some compilers */
+          condref = *(++ptr) - '0';    /* grumble at autoincrement in declaration */
+          while (*(++ptr) != ')') condref = condref*10 + *ptr - '0';
+          if (condref == 0)
+            {
+            *errorptr = ERR35;
+            goto FAILED;
+            }
+          ptr++;
+          code[1+LINK_SIZE] = OP_CREF;
+          PUT2(code, 2+LINK_SIZE, condref);
+          skipbytes = 3;
+          }
+        /* For conditions that are assertions, we just fall through, having
+        set bravalue above. */
+        break;
+
+        case '=':                 /* Positive lookahead */
+        bravalue = OP_ASSERT;
+        ptr++;
+        break;
+
+        case '!':                 /* Negative lookahead */
+        bravalue = OP_ASSERT_NOT;
+        ptr++;
+        break;
+
+        case '<':                 /* Lookbehinds */
+        switch (*(++ptr))
+          {
+          case '=':               /* Positive lookbehind */
+          bravalue = OP_ASSERTBACK;
+          ptr++;
+          break;
+
+          case '!':               /* Negative lookbehind */
+          bravalue = OP_ASSERTBACK_NOT;
+          ptr++;
+          break;
+          }
+        break;
+
+        case '>':                 /* One-time brackets */
+        bravalue = OP_ONCE;
+        ptr++;
+        break;
+
+        case 'C':                 /* Callout - may be followed by digits */
+        *code++ = OP_CALLOUT;
+          {
+          int n = 0;
+          while ((digitab[*(++ptr)] & ctype_digit) != 0)
+            n = n * 10 + *ptr - '0';
+          if (n > 255)
+            {
+            *errorptr = ERR38;
+            goto FAILED;
+            }
+          *code++ = n;
+          }
+        previous = NULL;
+        continue;
+
+        case 'P':                 /* Named subpattern handling */
+        if (*(++ptr) == '<')      /* Definition */
+          {
+          int i, namelen;
+          uschar *slot = cd->name_table;
+          const uschar *name;     /* Don't amalgamate; some compilers */
+          name = ++ptr;           /* grumble at autoincrement in declaration */
+
+          while (*ptr++ != '>');
+          namelen = ptr - name - 1;
+
+          for (i = 0; i < cd->names_found; i++)
+            {
+            int crc = memcmp(name, slot+2, namelen);
+            if (crc == 0)
+              {
+              if (slot[2+namelen] == 0)
+                {
+                *errorptr = ERR43;
+                goto FAILED;
+                }
+              crc = -1;             /* Current name is substring */
+              }
+            if (crc < 0)
+              {
+              memmove(slot + cd->name_entry_size, slot,
+                (cd->names_found - i) * cd->name_entry_size);
+              break;
+              }
+            slot += cd->name_entry_size;
+            }
+
+          PUT2(slot, 0, *brackets + 1);
+          memcpy(slot + 2, name, namelen);
+          slot[2+namelen] = 0;
+          cd->names_found++;
+          goto NUMBERED_GROUP;
+          }
+
+        if (*ptr == '=' || *ptr == '>')  /* Reference or recursion */
+          {
+          int i, namelen;
+          int type = *ptr++;
+          const uschar *name = ptr;
+          uschar *slot = cd->name_table;
+
+          while (*ptr != ')') ptr++;
+          namelen = ptr - name;
+
+          for (i = 0; i < cd->names_found; i++)
+            {
+            if (strncmp((char *)name, (char *)slot+2, namelen) == 0) break;
+            slot += cd->name_entry_size;
+            }
+          if (i >= cd->names_found)
+            {
+            *errorptr = ERR15;
+            goto FAILED;
+            }
+
+          recno = GET2(slot, 0);
+
+          if (type == '>') goto HANDLE_RECURSION;  /* A few lines below */
+
+          /* Back reference */
+
+          previous = code;
+          *code++ = OP_REF;
+          PUT2INC(code, 0, recno);
+          cd->backref_map |= (recno < 32)? (1 << recno) : 1;
+          if (recno > cd->top_backref) cd->top_backref = recno;
+          continue;
+          }
+
+        /* Should never happen */
+        break;
+
+        case 'R':                 /* Pattern recursion */
+        ptr++;                    /* Same as (?0)      */
+        /* Fall through */
+
+        /* Recursion or "subroutine" call */
+
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+          {
+          const uschar *called;
+          recno = 0;
+          while((digitab[*ptr] & ctype_digit) != 0)
+            recno = recno * 10 + *ptr++ - '0';
+
+          /* Come here from code above that handles a named recursion */
+
+          HANDLE_RECURSION:
+
+          previous = code;
+
+          /* Find the bracket that is being referenced. Temporarily end the
+          regex in case it doesn't exist. */
+
+          *code = OP_END;
+          called = (recno == 0)?
+            cd->start_code : find_bracket(cd->start_code, utf8, recno);
+
+          if (called == NULL)
+            {
+            *errorptr = ERR15;
+            goto FAILED;
+            }
+
+          /* If the subpattern is still open, this is a recursive call. We
+          check to see if this is a left recursion that could loop for ever,
+          and diagnose that case. */
+
+          if (GET(called, 1) == 0 && could_be_empty(called, code, bcptr, utf8))
+            {
+            *errorptr = ERR40;
+            goto FAILED;
+            }
+
+          /* Insert the recursion/subroutine item */
+
+          *code = OP_RECURSE;
+          PUT(code, 1, called - cd->start_code);
+          code += 1 + LINK_SIZE;
+          }
+        continue;
+
+        /* Character after (? not specially recognized */
+
+        default:                  /* Option setting */
+        set = unset = 0;
+        optset = &set;
+
+        while (*ptr != ')' && *ptr != ':')
+          {
+          switch (*ptr++)
+            {
+            case '-': optset = &unset; break;
+
+            case 'i': *optset |= PCRE_CASELESS; break;
+            case 'm': *optset |= PCRE_MULTILINE; break;
+            case 's': *optset |= PCRE_DOTALL; break;
+            case 'x': *optset |= PCRE_EXTENDED; break;
+            case 'U': *optset |= PCRE_UNGREEDY; break;
+            case 'X': *optset |= PCRE_EXTRA; break;
+            }
+          }
+
+        /* Set up the changed option bits, but don't change anything yet. */
+
+        newoptions = (options | set) & (~unset);
+
+        /* If the options ended with ')' this is not the start of a nested
+        group with option changes, so the options change at this level. Compile
+        code to change the ims options if this setting actually changes any of
+        them. We also pass the new setting back so that it can be put at the
+        start of any following branches, and when this group ends (if we are in
+        a group), a resetting item can be compiled.
+
+        Note that if this item is right at the start of the pattern, the
+        options will have been abstracted and made global, so there will be no
+        change to compile. */
+
+        if (*ptr == ')')
+          {
+          if ((options & PCRE_IMS) != (newoptions & PCRE_IMS))
+            {
+            *code++ = OP_OPT;
+            *code++ = newoptions & PCRE_IMS;
+            }
+
+          /* Change options at this level, and pass them back for use
+          in subsequent branches. Reset the greedy defaults and the case
+          value for firstbyte and reqbyte. */
+
+          *optionsptr = options = newoptions;
+          greedy_default = ((newoptions & PCRE_UNGREEDY) != 0);
+          greedy_non_default = greedy_default ^ 1;
+          req_caseopt = ((options & PCRE_CASELESS) != 0)? REQ_CASELESS : 0;
+
+          previous = NULL;       /* This item can't be repeated */
+          continue;              /* It is complete */
+          }
+
+        /* If the options ended with ':' we are heading into a nested group
+        with possible change of options. Such groups are non-capturing and are
+        not assertions of any kind. All we need to do is skip over the ':';
+        the newoptions value is handled below. */
+
+        bravalue = OP_BRA;
+        ptr++;
+        }
+      }
+
+    /* If PCRE_NO_AUTO_CAPTURE is set, all unadorned brackets become
+    non-capturing and behave like (?:...) brackets */
+
+    else if ((options & PCRE_NO_AUTO_CAPTURE) != 0)
+      {
+      bravalue = OP_BRA;
+      }
+
+    /* Else we have a referencing group; adjust the opcode. If the bracket
+    number is greater than EXTRACT_BASIC_MAX, we set the opcode one higher, and
+    arrange for the true number to follow later, in an OP_BRANUMBER item. */
+
+    else
+      {
+      NUMBERED_GROUP:
+      if (++(*brackets) > EXTRACT_BASIC_MAX)
+        {
+        bravalue = OP_BRA + EXTRACT_BASIC_MAX + 1;
+        code[1+LINK_SIZE] = OP_BRANUMBER;
+        PUT2(code, 2+LINK_SIZE, *brackets);
+        skipbytes = 3;
+        }
+      else bravalue = OP_BRA + *brackets;
+      }
+
+    /* Process nested bracketed re. Assertions may not be repeated, but other
+    kinds can be. We copy code into a non-register variable in order to be able
+    to pass its address because some compilers complain otherwise. Pass in a
+    new setting for the ims options if they have changed. */
+
+    previous = (bravalue >= OP_ONCE)? code : NULL;
+    *code = bravalue;
+    tempcode = code;
+    tempreqvary = cd->req_varyopt;     /* Save value before bracket */
+
+    if (!compile_regex(
+         newoptions,                   /* The complete new option state */
+         options & PCRE_IMS,           /* The previous ims option state */
+         brackets,                     /* Extracting bracket count */
+         &tempcode,                    /* Where to put code (updated) */
+         &ptr,                         /* Input pointer (updated) */
+         errorptr,                     /* Where to put an error message */
+         (bravalue == OP_ASSERTBACK ||
+          bravalue == OP_ASSERTBACK_NOT), /* TRUE if back assert */
+         skipbytes,                    /* Skip over OP_COND/OP_BRANUMBER */
+         &subfirstbyte,                /* For possible first char */
+         &subreqbyte,                  /* For possible last char */
+         bcptr,                        /* Current branch chain */
+         cd))                          /* Tables block */
+      goto FAILED;
+
+    /* At the end of compiling, code is still pointing to the start of the
+    group, while tempcode has been updated to point past the end of the group
+    and any option resetting that may follow it. The pattern pointer (ptr)
+    is on the bracket. */
+
+    /* If this is a conditional bracket, check that there are no more than
+    two branches in the group. */
+
+    else if (bravalue == OP_COND)
+      {
+      uschar *tc = code;
+      condcount = 0;
+
+      do {
+         condcount++;
+         tc += GET(tc,1);
+         }
+      while (*tc != OP_KET);
+
+      if (condcount > 2)
+        {
+        *errorptr = ERR27;
+        goto FAILED;
+        }
+
+      /* If there is just one branch, we must not make use of its firstbyte or
+      reqbyte, because this is equivalent to an empty second branch. */
+
+      if (condcount == 1) subfirstbyte = subreqbyte = REQ_NONE;
+      }
+
+    /* Handle updating of the required and first characters. Update for normal
+    brackets of all kinds, and conditions with two branches (see code above).
+    If the bracket is followed by a quantifier with zero repeat, we have to
+    back off. Hence the definition of zeroreqbyte and zerofirstbyte outside the
+    main loop so that they can be accessed for the back off. */
+
+    zeroreqbyte = reqbyte;
+    zerofirstbyte = firstbyte;
+    groupsetfirstbyte = FALSE;
+
+    if (bravalue >= OP_BRA || bravalue == OP_ONCE || bravalue == OP_COND)
+      {
+      /* If we have not yet set a firstbyte in this branch, take it from the
+      subpattern, remembering that it was set here so that a repeat of more
+      than one can replicate it as reqbyte if necessary. If the subpattern has
+      no firstbyte, set "none" for the whole branch. In both cases, a zero
+      repeat forces firstbyte to "none". */
+
+      if (firstbyte == REQ_UNSET)
+        {
+        if (subfirstbyte >= 0)
+          {
+          firstbyte = subfirstbyte;
+          groupsetfirstbyte = TRUE;
+          }
+        else firstbyte = REQ_NONE;
+        zerofirstbyte = REQ_NONE;
+        }
+
+      /* If firstbyte was previously set, convert the subpattern's firstbyte
+      into reqbyte if there wasn't one, using the vary flag that was in
+      existence beforehand. */
+
+      else if (subfirstbyte >= 0 && subreqbyte < 0)
+        subreqbyte = subfirstbyte | tempreqvary;
+
+      /* If the subpattern set a required byte (or set a first byte that isn't
+      really the first byte - see above), set it. */
+
+      if (subreqbyte >= 0) reqbyte = subreqbyte;
+      }
+
+    /* For a forward assertion, we take the reqbyte, if set. This can be
+    helpful if the pattern that follows the assertion doesn't set a different
+    char. For example, it's useful for /(?=abcde).+/. We can't set firstbyte
+    for an assertion, however because it leads to incorrect effect for patterns
+    such as /(?=a)a.+/ when the "real" "a" would then become a reqbyte instead
+    of a firstbyte. This is overcome by a scan at the end if there's no
+    firstbyte, looking for an asserted first char. */
+
+    else if (bravalue == OP_ASSERT && subreqbyte >= 0) reqbyte = subreqbyte;
+
+    /* Now update the main code pointer to the end of the group. */
+
+    code = tempcode;
+
+    /* Error if hit end of pattern */
+
+    if (*ptr != ')')
+      {
+      *errorptr = ERR14;
+      goto FAILED;
+      }
+    break;
+
+    /* Check \ for being a real metacharacter; if not, fall through and handle
+    it as a data character at the start of a string. Escape items are checked
+    for validity in the pre-compiling pass. */
+
+    case '\\':
+    tempptr = ptr;
+    c = check_escape(&ptr, errorptr, *brackets, options, FALSE);
+
+    /* Handle metacharacters introduced by \. For ones like \d, the ESC_ values
+    are arranged to be the negation of the corresponding OP_values. For the
+    back references, the values are ESC_REF plus the reference number. Only
+    back references and those types that consume a character may be repeated.
+    We can test for values between ESC_b and ESC_Z for the latter; this may
+    have to change if any new ones are ever created. */
+
+    if (c < 0)
+      {
+      if (-c == ESC_Q)            /* Handle start of quoted string */
+        {
+        if (ptr[1] == '\\' && ptr[2] == 'E') ptr += 2; /* avoid empty string */
+          else inescq = TRUE;
+        continue;
+        }
+
+      /* For metasequences that actually match a character, we disable the
+      setting of a first character if it hasn't already been set. */
+
+      if (firstbyte == REQ_UNSET && -c > ESC_b && -c < ESC_Z)
+        firstbyte = REQ_NONE;
+
+      /* Set values to reset to if this is followed by a zero repeat. */
+
+      zerofirstbyte = firstbyte;
+      zeroreqbyte = reqbyte;
+
+      /* Back references are handled specially */
+
+      if (-c >= ESC_REF)
+        {
+        int number = -c - ESC_REF;
+        previous = code;
+        *code++ = OP_REF;
+        PUT2INC(code, 0, number);
+        }
+      else
+        {
+        previous = (-c > ESC_b && -c < ESC_Z)? code : NULL;
+        *code++ = -c;
+        }
+      continue;
+      }
+
+    /* Data character: reset and fall through */
+
+    ptr = tempptr;
+    c = '\\';
+
+    /* Handle a run of data characters until a metacharacter is encountered.
+    The first character is guaranteed not to be whitespace or # when the
+    extended flag is set. */
+
+    NORMAL_CHAR:
+    default:
+    previous = code;
+    *code = OP_CHARS;
+    code += 2;
+    length = 0;
+
+    do
+      {
+      /* If in \Q...\E, check for the end; if not, we always have a literal */
+
+      if (inescq)
+        {
+        if (c == '\\' && ptr[1] == 'E')
+          {
+          inescq = FALSE;
+          ptr++;
+          }
+        else
+          {
+          *code++ = c;
+          length++;
+          }
+        continue;
+        }
+
+      /* Skip white space and comments for /x patterns */
+
+      if ((options & PCRE_EXTENDED) != 0)
+        {
+        if ((cd->ctypes[c] & ctype_space) != 0) continue;
+        if (c == '#')
+          {
+          /* The space before the ; is to avoid a warning on a silly compiler
+          on the Macintosh. */
+          while ((c = *(++ptr)) != 0 && c != NEWLINE) ;
+          if (c == 0) break;
+          continue;
+          }
+        }
+
+      /* Backslash may introduce a data char or a metacharacter. Escaped items
+      are checked for validity in the pre-compiling pass. Stop the string
+      before a metaitem. */
+
+      if (c == '\\')
+        {
+        tempptr = ptr;
+        c = check_escape(&ptr, errorptr, *brackets, options, FALSE);
+        if (c < 0) { ptr = tempptr; break; }
+
+        /* If a character is > 127 in UTF-8 mode, we have to turn it into
+        two or more bytes in the UTF-8 encoding. */
+
+#ifdef SUPPORT_UTF8
+        if (utf8 && c > 127)
+          {
+          uschar buffer[8];
+          int len = ord2utf8(c, buffer);
+          for (c = 0; c < len; c++) *code++ = buffer[c];
+          length += len;
+          continue;
+          }
+#endif
+        }
+
+      /* Ordinary character or single-char escape */
+
+      *code++ = c;
+      length++;
+      }
+
+    /* This "while" is the end of the "do" above. */
+
+    while (length < MAXLIT && (cd->ctypes[c = *(++ptr)] & ctype_meta) == 0);
+
+    /* Update the first and last requirements. These are always bytes, even in
+    UTF-8 mode. However, there is a special case to be considered when there
+    are only one or two characters. Because this gets messy in UTF-8 mode, the
+    code is kept separate. When we get here "length" contains the number of
+    bytes. */
+
+#ifdef SUPPORT_UTF8
+    if (utf8 && length > 1)
+      {
+      uschar *t = previous + 3;                      /* After this code, t */
+      while (t < code && (*t & 0xc0) == 0x80) t++;   /* follows the 1st char */
+
+      /* Handle the case when there is only one multibyte character. It must
+      have at least two bytes because of the "length > 1" test above. */
+
+      if (t == code)
+        {
+        /* If no previous first byte, set it from this character, but revert to
+        none on a zero repeat. */
+
+        if (firstbyte == REQ_UNSET)
+          {
+          zerofirstbyte = REQ_NONE;
+          firstbyte = previous[2];
+          }
+
+        /* Otherwise, leave the first byte value alone, and don't change it on
+        a zero repeat */
+
+        else zerofirstbyte = firstbyte;
+
+        /* In both cases, a zero repeat resets the previous required byte */
+
+        zeroreqbyte = reqbyte;
+        }
+
+      /* Handle the case when there is more than one character. These may be
+      single-byte or multibyte characters */
+
+      else
+        {
+        t = code - 1;                       /* After this code, t is at the */
+        while ((*t & 0xc0) == 0x80) t--;    /* start of the last character */
+
+        /* If no previous first byte, set it from the first character, and
+        retain it on a zero repeat (of the last character). The required byte
+        is reset on a zero repeat, either to the byte before the last
+        character, unless this is the first byte of the string. In that case,
+        it reverts to its previous value. */
+
+        if (firstbyte == REQ_UNSET)
+          {
+          zerofirstbyte = firstbyte = previous[2] | req_caseopt;
+          zeroreqbyte = (t - 1 == previous + 2)?
+            reqbyte : t[-1] | req_caseopt | cd->req_varyopt;
+          }
+
+        /* If there was a previous first byte, leave it alone, and don't change
+        it on a zero repeat. The required byte is reset on a zero repeat to the
+        byte before the last character. */
+
+        else
+          {
+          zerofirstbyte = firstbyte;
+          zeroreqbyte = t[-1] | req_caseopt | cd->req_varyopt;
+          }
+        }
+
+      /* In all cases (we know length > 1), the new required byte is the last
+      byte of the string. */
+
+      reqbyte = code[-1] | req_caseopt | cd->req_varyopt;
+      }
+
+    else   /* End of UTF-8 coding */
+#endif
+
+    /* This is the code for non-UTF-8 operation, either without UTF-8 support,
+    or when UTF-8 is not enabled. */
+
+      {
+      /* firstbyte was not previously set; take it from this string */
+
+      if (firstbyte == REQ_UNSET)
+        {
+        if (length == 1)
+          {
+          zerofirstbyte = REQ_NONE;
+          firstbyte = previous[2] | req_caseopt;
+          zeroreqbyte = reqbyte;
+          }
+        else
+          {
+          zerofirstbyte = firstbyte = previous[2] | req_caseopt;
+          zeroreqbyte = (length > 2)?
+            (code[-2] | req_caseopt | cd->req_varyopt) : reqbyte;
+          reqbyte = code[-1] | req_caseopt | cd->req_varyopt;
+          }
+        }
+
+      /* firstbyte was previously set */
+
+      else
+        {
+        zerofirstbyte = firstbyte;
+        zeroreqbyte = (length == 1)? reqbyte :
+          code[-2] | req_caseopt | cd->req_varyopt;
+        reqbyte = code[-1] | req_caseopt | cd->req_varyopt;
+        }
+      }
+
+    /* Set the length in the data vector, and advance to the next state. */
+
+    previous[1] = length;
+    if (length < MAXLIT) ptr--;
+    break;
+    }
+  }                   /* end of big loop */
+
+/* Control never reaches here by falling through, only by a goto for all the
+error states. Pass back the position in the pattern so that it can be displayed
+to the user for diagnosing the error. */
+
+FAILED:
+*ptrptr = ptr;
+return FALSE;
+}
+
+
+
+
+/*************************************************
+*     Compile sequence of alternatives           *
+*************************************************/
+
+/* On entry, ptr is pointing past the bracket character, but on return
+it points to the closing bracket, or vertical bar, or end of string.
+The code variable is pointing at the byte into which the BRA operator has been
+stored. If the ims options are changed at the start (for a (?ims: group) or
+during any branch, we need to insert an OP_OPT item at the start of every
+following branch to ensure they get set correctly at run time, and also pass
+the new options into every subsequent branch compile.
+
+Argument:
+  options        option bits, including any changes for this subpattern
+  oldims         previous settings of ims option bits
+  brackets       -> int containing the number of extracting brackets used
+  codeptr        -> the address of the current code pointer
+  ptrptr         -> the address of the current pattern pointer
+  errorptr       -> pointer to error message
+  lookbehind     TRUE if this is a lookbehind assertion
+  skipbytes      skip this many bytes at start (for OP_COND, OP_BRANUMBER)
+  firstbyteptr   place to put the first required character, or a negative number
+  reqbyteptr     place to put the last required character, or a negative number
+  bcptr          pointer to the chain of currently open branches
+  cd             points to the data block with tables pointers etc.
+
+Returns:      TRUE on success
+*/
+
+static BOOL
+compile_regex(int options, int oldims, int *brackets, uschar **codeptr,
+  const uschar **ptrptr, const char **errorptr, BOOL lookbehind, int skipbytes,
+  int *firstbyteptr, int *reqbyteptr, branch_chain *bcptr, compile_data *cd)
+{
+const uschar *ptr = *ptrptr;
+uschar *code = *codeptr;
+uschar *last_branch = code;
+uschar *start_bracket = code;
+uschar *reverse_count = NULL;
+int firstbyte, reqbyte;
+int branchfirstbyte, branchreqbyte;
+branch_chain bc;
+
+bc.outer = bcptr;
+bc.current = code;
+
+firstbyte = reqbyte = REQ_UNSET;
+
+/* Offset is set zero to mark that this bracket is still open */
+
+PUT(code, 1, 0);
+code += 1 + LINK_SIZE + skipbytes;
+
+/* Loop for each alternative branch */
+
+for (;;)
+  {
+  /* Handle a change of ims options at the start of the branch */
+
+  if ((options & PCRE_IMS) != oldims)
+    {
+    *code++ = OP_OPT;
+    *code++ = options & PCRE_IMS;
+    }
+
+  /* Set up dummy OP_REVERSE if lookbehind assertion */
+
+  if (lookbehind)
+    {
+    *code++ = OP_REVERSE;
+    reverse_count = code;
+    PUTINC(code, 0, 0);
+    }
+
+  /* Now compile the branch */
+
+  if (!compile_branch(&options, brackets, &code, &ptr, errorptr,
+        &branchfirstbyte, &branchreqbyte, &bc, cd))
+    {
+    *ptrptr = ptr;
+    return FALSE;
+    }
+
+  /* If this is the first branch, the firstbyte and reqbyte values for the
+  branch become the values for the regex. */
+
+  if (*last_branch != OP_ALT)
+    {
+    firstbyte = branchfirstbyte;
+    reqbyte = branchreqbyte;
+    }
+
+  /* If this is not the first branch, the first char and reqbyte have to
+  match the values from all the previous branches, except that if the previous
+  value for reqbyte didn't have REQ_VARY set, it can still match, and we set
+  REQ_VARY for the regex. */
+
+  else
+    {
+    /* If we previously had a firstbyte, but it doesn't match the new branch,
+    we have to abandon the firstbyte for the regex, but if there was previously
+    no reqbyte, it takes on the value of the old firstbyte. */
+
+    if (firstbyte >= 0 && firstbyte != branchfirstbyte)
+      {
+      if (reqbyte < 0) reqbyte = firstbyte;
+      firstbyte = REQ_NONE;
+      }
+
+    /* If we (now or from before) have no firstbyte, a firstbyte from the
+    branch becomes a reqbyte if there isn't a branch reqbyte. */
+
+    if (firstbyte < 0 && branchfirstbyte >= 0 && branchreqbyte < 0)
+        branchreqbyte = branchfirstbyte;
+
+    /* Now ensure that the reqbytes match */
+
+    if ((reqbyte & ~REQ_VARY) != (branchreqbyte & ~REQ_VARY))
+      reqbyte = REQ_NONE;
+    else reqbyte |= branchreqbyte;   /* To "or" REQ_VARY */
+    }
+
+  /* If lookbehind, check that this branch matches a fixed-length string,
+  and put the length into the OP_REVERSE item. Temporarily mark the end of
+  the branch with OP_END. */
+
+  if (lookbehind)
+    {
+    int length;
+    *code = OP_END;
+    length = find_fixedlength(last_branch, options);
+    DPRINTF(("fixed length = %d\n", length));
+    if (length < 0)
+      {
+      *errorptr = (length == -2)? ERR36 : ERR25;
+      *ptrptr = ptr;
+      return FALSE;
+      }
+    PUT(reverse_count, 0, length);
+    }
+
+  /* Reached end of expression, either ')' or end of pattern. Go back through
+  the alternative branches and reverse the chain of offsets, with the field in
+  the BRA item now becoming an offset to the first alternative. If there are
+  no alternatives, it points to the end of the group. The length in the
+  terminating ket is always the length of the whole bracketed item. If any of
+  the ims options were changed inside the group, compile a resetting op-code
+  following, except at the very end of the pattern. Return leaving the pointer
+  at the terminating char. */
+
+  if (*ptr != '|')
+    {
+    int length = code - last_branch;
+    do
+      {
+      int prev_length = GET(last_branch, 1);
+      PUT(last_branch, 1, length);
+      length = prev_length;
+      last_branch -= length;
+      }
+    while (length > 0);
+
+    /* Fill in the ket */
+
+    *code = OP_KET;
+    PUT(code, 1, code - start_bracket);
+    code += 1 + LINK_SIZE;
+
+    /* Resetting option if needed */
+
+    if ((options & PCRE_IMS) != oldims && *ptr == ')')
+      {
+      *code++ = OP_OPT;
+      *code++ = oldims;
+      }
+
+    /* Set values to pass back */
+
+    *codeptr = code;
+    *ptrptr = ptr;
+    *firstbyteptr = firstbyte;
+    *reqbyteptr = reqbyte;
+    return TRUE;
+    }
+
+  /* Another branch follows; insert an "or" node. Its length field points back
+  to the previous branch while the bracket remains open. At the end the chain
+  is reversed. It's done like this so that the start of the bracket has a
+  zero offset until it is closed, making it possible to detect recursion. */
+
+  *code = OP_ALT;
+  PUT(code, 1, code - last_branch);
+  bc.current = last_branch = code;
+  code += 1 + LINK_SIZE;
+  ptr++;
+  }
+/* Control never reaches here */
+}
+
+
+
+
+/*************************************************
+*          Check for anchored expression         *
+*************************************************/
+
+/* Try to find out if this is an anchored regular expression. Consider each
+alternative branch. If they all start with OP_SOD or OP_CIRC, or with a bracket
+all of whose alternatives start with OP_SOD or OP_CIRC (recurse ad lib), then
+it's anchored. However, if this is a multiline pattern, then only OP_SOD
+counts, since OP_CIRC can match in the middle.
+
+We can also consider a regex to be anchored if OP_SOM starts all its branches.
+This is the code for \G, which means "match at start of match position, taking
+into account the match offset".
+
+A branch is also implicitly anchored if it starts with .* and DOTALL is set,
+because that will try the rest of the pattern at all possible matching points,
+so there is no point trying again.... er ....
+
+.... except when the .* appears inside capturing parentheses, and there is a
+subsequent back reference to those parentheses. We haven't enough information
+to catch that case precisely.
+
+At first, the best we could do was to detect when .* was in capturing brackets
+and the highest back reference was greater than or equal to that level.
+However, by keeping a bitmap of the first 31 back references, we can catch some
+of the more common cases more precisely.
+
+Arguments:
+  code           points to start of expression (the bracket)
+  options        points to the options setting
+  bracket_map    a bitmap of which brackets we are inside while testing; this
+                  handles up to substring 31; after that we just have to take
+                  the less precise approach
+  backref_map    the back reference bitmap
+
+Returns:     TRUE or FALSE
+*/
+
+static BOOL
+is_anchored(register const uschar *code, int *options, unsigned int bracket_map,
+  unsigned int backref_map)
+{
+do {
+   const uschar *scode =
+     first_significant_code(code + 1+LINK_SIZE, options, PCRE_MULTILINE);
+   register int op = *scode;
+
+   /* Capturing brackets */
+
+   if (op > OP_BRA)
+     {
+     int new_map;
+     op -= OP_BRA;
+     if (op > EXTRACT_BASIC_MAX) op = GET2(scode, 2+LINK_SIZE);
+     new_map = bracket_map | ((op < 32)? (1 << op) : 1);
+     if (!is_anchored(scode, options, new_map, backref_map)) return FALSE;
+     }
+
+   /* Other brackets */
+
+   else if (op == OP_BRA || op == OP_ASSERT || op == OP_ONCE || op == OP_COND)
+     {
+     if (!is_anchored(scode, options, bracket_map, backref_map)) return FALSE;
+     }
+
+   /* .* is not anchored unless DOTALL is set and it isn't in brackets that
+   are or may be referenced. */
+
+   else if ((op == OP_TYPESTAR || op == OP_TYPEMINSTAR) &&
+            (*options & PCRE_DOTALL) != 0)
+     {
+     if (scode[1] != OP_ANY || (bracket_map & backref_map) != 0) return FALSE;
+     }
+
+   /* Check for explicit anchoring */
+
+   else if (op != OP_SOD && op != OP_SOM &&
+           ((*options & PCRE_MULTILINE) != 0 || op != OP_CIRC))
+     return FALSE;
+   code += GET(code, 1);
+   }
+while (*code == OP_ALT);   /* Loop for each alternative */
+return TRUE;
+}
+
+
+
+/*************************************************
+*         Check for starting with ^ or .*        *
+*************************************************/
+
+/* This is called to find out if every branch starts with ^ or .* so that
+"first char" processing can be done to speed things up in multiline
+matching and for non-DOTALL patterns that start with .* (which must start at
+the beginning or after \n). As in the case of is_anchored() (see above), we
+have to take account of back references to capturing brackets that contain .*
+because in that case we can't make the assumption.
+
+Arguments:
+  code           points to start of expression (the bracket)
+  bracket_map    a bitmap of which brackets we are inside while testing; this
+                  handles up to substring 31; after that we just have to take
+                  the less precise approach
+  backref_map    the back reference bitmap
+
+Returns:         TRUE or FALSE
+*/
+
+static BOOL
+is_startline(const uschar *code, unsigned int bracket_map,
+  unsigned int backref_map)
+{
+do {
+   const uschar *scode = first_significant_code(code + 1+LINK_SIZE, NULL, 0);
+   register int op = *scode;
+
+   /* Capturing brackets */
+
+   if (op > OP_BRA)
+     {
+     int new_map;
+     op -= OP_BRA;
+     if (op > EXTRACT_BASIC_MAX) op = GET2(scode, 2+LINK_SIZE);
+     new_map = bracket_map | ((op < 32)? (1 << op) : 1);
+     if (!is_startline(scode, new_map, backref_map)) return FALSE;
+     }
+
+   /* Other brackets */
+
+   else if (op == OP_BRA || op == OP_ASSERT || op == OP_ONCE || op == OP_COND)
+     { if (!is_startline(scode, bracket_map, backref_map)) return FALSE; }
+
+   /* .* is not anchored unless DOTALL is set and it isn't in brackets that
+   may be referenced. */
+
+   else if (op == OP_TYPESTAR || op == OP_TYPEMINSTAR)
+     {
+     if (scode[1] != OP_ANY || (bracket_map & backref_map) != 0) return FALSE;
+     }
+
+   /* Check for explicit circumflex */
+
+   else if (op != OP_CIRC) return FALSE;
+   code += GET(code, 1);
+   }
+while (*code == OP_ALT);  /* Loop for each alternative */
+return TRUE;
+}
+
+
+
+/*************************************************
+*       Check for asserted fixed first char      *
+*************************************************/
+
+/* During compilation, the "first char" settings from forward assertions are
+discarded, because they can cause conflicts with actual literals that follow.
+However, if we end up without a first char setting for an unanchored pattern,
+it is worth scanning the regex to see if there is an initial asserted first
+char. If all branches start with the same asserted char, or with a bracket all
+of whose alternatives start with the same asserted char (recurse ad lib), then
+we return that char, otherwise -1.
+
+Arguments:
+  code       points to start of expression (the bracket)
+  options    pointer to the options (used to check casing changes)
+  inassert   TRUE if in an assertion
+
+Returns:     -1 or the fixed first char
+*/
+
+static int
+find_firstassertedchar(const uschar *code, int *options, BOOL inassert)
+{
+register int c = -1;
+do {
+   int d;
+   const uschar *scode =
+     first_significant_code(code + 1+LINK_SIZE, options, PCRE_CASELESS);
+   register int op = *scode;
+
+   if (op >= OP_BRA) op = OP_BRA;
+
+   switch(op)
+     {
+     default:
+     return -1;
+
+     case OP_BRA:
+     case OP_ASSERT:
+     case OP_ONCE:
+     case OP_COND:
+     if ((d = find_firstassertedchar(scode, options, op == OP_ASSERT)) < 0)
+       return -1;
+     if (c < 0) c = d; else if (c != d) return -1;
+     break;
+
+     case OP_EXACT:       /* Fall through */
+     scode++;
+
+     case OP_CHARS:       /* Fall through */
+     scode++;
+
+     case OP_PLUS:
+     case OP_MINPLUS:
+     if (!inassert) return -1;
+     if (c < 0)
+       {
+       c = scode[1];
+       if ((*options & PCRE_CASELESS) != 0) c |= REQ_CASELESS;
+       }
+     else if (c != scode[1]) return -1;
+     break;
+     }
+
+   code += GET(code, 1);
+   }
+while (*code == OP_ALT);
+return c;
+}
+
+
+
+
+#ifdef SUPPORT_UTF8
+/*************************************************
+*         Validate a UTF-8 string                *
+*************************************************/
+
+/* This function is called (optionally) at the start of compile or match, to
+validate that a supposed UTF-8 string is actually valid. The early check means
+that subsequent code can assume it is dealing with a valid string. The check
+can be turned off for maximum performance, but then consequences of supplying
+an invalid string are then undefined.
+
+Arguments:
+  string       points to the string
+  length       length of string, or -1 if the string is zero-terminated
+
+Returns:       < 0    if the string is a valid UTF-8 string
+               >= 0   otherwise; the value is the offset of the bad byte
+*/
+
+static int
+valid_utf8(const uschar *string, int length)
+{
+register const uschar *p;
+
+if (length < 0)
+  {
+  for (p = string; *p != 0; p++);
+  length = p - string;
+  }
+
+for (p = string; length-- > 0; p++)
+  {
+  register int ab;
+  register int c = *p;
+  if (c < 128) continue;
+  if ((c & 0xc0) != 0xc0) return p - string;
+  ab = utf8_table4[c & 0x3f];  /* Number of additional bytes */
+  if (length < ab) return p - string;
+  length -= ab;
+
+  /* Check top bits in the second byte */
+  if ((*(++p) & 0xc0) != 0x80) return p - string;
+
+  /* Check for overlong sequences for each different length */
+  switch (ab)
+    {
+    /* Check for xx00 000x */
+    case 1:
+    if ((c & 0x3e) == 0) return p - string;
+    continue;   /* We know there aren't any more bytes to check */
+
+    /* Check for 1110 0000, xx0x xxxx */
+    case 2:
+    if (c == 0xe0 && (*p & 0x20) == 0) return p - string;
+    break;
+
+    /* Check for 1111 0000, xx00 xxxx */
+    case 3:
+    if (c == 0xf0 && (*p & 0x30) == 0) return p - string;
+    break;
+
+    /* Check for 1111 1000, xx00 0xxx */
+    case 4:
+    if (c == 0xf8 && (*p & 0x38) == 0) return p - string;
+    break;
+
+    /* Check for leading 0xfe or 0xff, and then for 1111 1100, xx00 00xx */
+    case 5:
+    if (c == 0xfe || c == 0xff ||
+       (c == 0xfc && (*p & 0x3c) == 0)) return p - string;
+    break;
+    }
+
+  /* Check for valid bytes after the 2nd, if any; all must start 10 */
+  while (--ab > 0)
+    {
+    if ((*(++p) & 0xc0) != 0x80) return p - string;
+    }
+  }
+
+return -1;
+}
+#endif
+
+
+
+/*************************************************
+*        Compile a Regular Expression            *
+*************************************************/
+
+/* This function takes a string and returns a pointer to a block of store
+holding a compiled version of the expression.
+
+Arguments:
+  pattern      the regular expression
+  options      various option bits
+  errorptr     pointer to pointer to error text
+  erroroffset  ptr offset in pattern where error was detected
+  tables       pointer to character tables or NULL
+
+Returns:       pointer to compiled data block, or NULL on error,
+               with errorptr and erroroffset set
+*/
+
+EXPORT pcre *
+pcre_compile(const char *pattern, int options, const char **errorptr,
+  int *erroroffset, const unsigned char *tables)
+{
+real_pcre *re;
+int length = 1 + LINK_SIZE;      /* For initial BRA plus length */
+int runlength;
+int c, firstbyte, reqbyte;
+int bracount = 0;
+int branch_extra = 0;
+int branch_newextra;
+int item_count = -1;
+int name_count = 0;
+int max_name_size = 0;
+#ifdef SUPPORT_UTF8
+int lastcharlength = 0;
+BOOL utf8;
+BOOL class_utf8;
+#endif
+BOOL inescq = FALSE;
+unsigned int brastackptr = 0;
+size_t size;
+uschar *code;
+const uschar *codestart;
+const uschar *ptr;
+compile_data compile_block;
+int brastack[BRASTACK_SIZE];
+uschar bralenstack[BRASTACK_SIZE];
+
+/* We can't pass back an error message if errorptr is NULL; I guess the best we
+can do is just return NULL. */
+
+if (errorptr == NULL) return NULL;
+*errorptr = NULL;
+
+/* However, we can give a message for this error */
+
+if (erroroffset == NULL)
+  {
+  *errorptr = ERR16;
+  return NULL;
+  }
+*erroroffset = 0;
+
+/* Can't support UTF8 unless PCRE has been compiled to include the code. */
+
+#ifdef SUPPORT_UTF8
+utf8 = (options & PCRE_UTF8) != 0;
+if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0 &&
+     (*erroroffset = valid_utf8((uschar *)pattern, -1)) >= 0)
+  {
+  *errorptr = ERR44;
+  return NULL;
+  }
+#else
+if ((options & PCRE_UTF8) != 0)
+  {
+  *errorptr = ERR32;
+  return NULL;
+  }
+#endif
+
+if ((options & ~PUBLIC_OPTIONS) != 0)
+  {
+  *errorptr = ERR17;
+  return NULL;
+  }
+
+/* Set up pointers to the individual character tables */
+
+if (tables == NULL) tables = pcre_default_tables;
+compile_block.lcc = tables + lcc_offset;
+compile_block.fcc = tables + fcc_offset;
+compile_block.cbits = tables + cbits_offset;
+compile_block.ctypes = tables + ctypes_offset;
+
+/* Maximum back reference and backref bitmap. This is updated for numeric
+references during the first pass, but for named references during the actual
+compile pass. The bitmap records up to 31 back references to help in deciding
+whether (.*) can be treated as anchored or not. */
+
+compile_block.top_backref = 0;
+compile_block.backref_map = 0;
+
+/* Reflect pattern for debugging output */
+
+DPRINTF(("------------------------------------------------------------------\n"));
+DPRINTF(("%s\n", pattern));
+
+/* The first thing to do is to make a pass over the pattern to compute the
+amount of store required to hold the compiled code. This does not have to be
+perfect as long as errors are overestimates. At the same time we can detect any
+flag settings right at the start, and extract them. Make an attempt to correct
+for any counted white space if an "extended" flag setting appears late in the
+pattern. We can't be so clever for #-comments. */
+
+ptr = (const uschar *)(pattern - 1);
+while ((c = *(++ptr)) != 0)
+  {
+  int min, max;
+  int class_optcount;
+  int bracket_length;
+  int duplength;
+
+  /* If we are inside a \Q...\E sequence, all chars are literal */
+
+  if (inescq) goto NORMAL_CHAR;
+
+  /* Otherwise, first check for ignored whitespace and comments */
+
+  if ((options & PCRE_EXTENDED) != 0)
+    {
+    if ((compile_block.ctypes[c] & ctype_space) != 0) continue;
+    if (c == '#')
+      {
+      /* The space before the ; is to avoid a warning on a silly compiler
+      on the Macintosh. */
+      while ((c = *(++ptr)) != 0 && c != NEWLINE) ;
+      if (c == 0) break;
+      continue;
+      }
+    }
+
+  item_count++;    /* Is zero for the first non-comment item */
+
+  switch(c)
+    {
+    /* A backslashed item may be an escaped "normal" character or a
+    character type. For a "normal" character, put the pointers and
+    character back so that tests for whitespace etc. in the input
+    are done correctly. */
+
+    case '\\':
+      {
+      const uschar *save_ptr = ptr;
+      c = check_escape(&ptr, errorptr, bracount, options, FALSE);
+      if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+      if (c >= 0)
+        {
+        ptr = save_ptr;
+        c = '\\';
+        goto NORMAL_CHAR;
+        }
+      }
+
+    /* If \Q, enter "literal" mode */
+
+    if (-c == ESC_Q)
+      {
+      inescq = TRUE;
+      continue;
+      }
+
+    /* Other escapes need one byte, and are of length one for repeats */
+
+    length++;
+#ifdef SUPPORT_UTF8
+    lastcharlength = 1;
+#endif
+
+    /* A back reference needs an additional 2 bytes, plus either one or 5
+    bytes for a repeat. We also need to keep the value of the highest
+    back reference. */
+
+    if (c <= -ESC_REF)
+      {
+      int refnum = -c - ESC_REF;
+      compile_block.backref_map |= (refnum < 32)? (1 << refnum) : 1;
+      if (refnum > compile_block.top_backref)
+        compile_block.top_backref = refnum;
+      length += 2;   /* For single back reference */
+      if (ptr[1] == '{' && is_counted_repeat(ptr+2))
+        {
+        ptr = read_repeat_counts(ptr+2, &min, &max, errorptr);
+        if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+        if ((min == 0 && (max == 1 || max == -1)) ||
+          (min == 1 && max == -1))
+            length++;
+        else length += 5;
+        if (ptr[1] == '?') ptr++;
+        }
+      }
+    continue;
+
+    case '^':     /* Single-byte metacharacters */
+    case '.':
+    case '$':
+    length++;
+#ifdef SUPPORT_UTF8
+    lastcharlength = 1;
+#endif
+    continue;
+
+    case '*':            /* These repeats won't be after brackets; */
+    case '+':            /* those are handled separately */
+    case '?':
+    length++;
+    goto POSESSIVE;      /* A few lines below */
+
+    /* This covers the cases of braced repeats after a single char, metachar,
+    class, or back reference. */
+
+    case '{':
+    if (!is_counted_repeat(ptr+1)) goto NORMAL_CHAR;
+    ptr = read_repeat_counts(ptr+1, &min, &max, errorptr);
+    if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+
+    /* These special cases just insert one extra opcode */
+
+    if ((min == 0 && (max == 1 || max == -1)) ||
+      (min == 1 && max == -1))
+        length++;
+
+    /* These cases might insert additional copies of a preceding character. */
+
+    else
+      {
+#ifdef SUPPORT_UTF8
+      /* In UTF-8 mode, we should find the length in lastcharlength */
+      if (utf8)
+        {
+        if (min != 1)
+          {
+          length -= lastcharlength;   /* Uncount the original char or metachar */
+          if (min > 0) length += 3 + lastcharlength;
+          }
+        length += lastcharlength + ((max > 0)? 3 : 1);
+        }
+      else
+#endif
+
+      /* Not UTF-8 mode: all characters are one byte */
+        {
+        if (min != 1)
+          {
+          length--;   /* Uncount the original char or metachar */
+          if (min > 0) length += 4;
+          }
+
+        length += (max > 0)? 4 : 2;
+        }
+      }
+
+    if (ptr[1] == '?') ptr++;      /* Needs no extra length */
+
+    POSESSIVE:                     /* Test for possessive quantifier */
+    if (ptr[1] == '+')
+      {
+      ptr++;
+      length += 2 + 2*LINK_SIZE;   /* Allow for atomic brackets */
+      }
+    continue;
+
+    /* An alternation contains an offset to the next branch or ket. If any ims
+    options changed in the previous branch(es), and/or if we are in a
+    lookbehind assertion, extra space will be needed at the start of the
+    branch. This is handled by branch_extra. */
+
+    case '|':
+    length += 1 + LINK_SIZE + branch_extra;
+    continue;
+
+    /* A character class uses 33 characters provided that all the character
+    values are less than 256. Otherwise, it uses a bit map for low valued
+    characters, and individual items for others. Don't worry about character
+    types that aren't allowed in classes - they'll get picked up during the
+    compile. A character class that contains only one single-byte character
+    uses 2 or 3 bytes, depending on whether it is negated or not. Notice this
+    where we can. (In UTF-8 mode we can do this only for chars < 128.) */
+
+    case '[':
+    class_optcount = 0;
+
+#ifdef SUPPORT_UTF8
+    class_utf8 = FALSE;
+#endif
+
+    if (*(++ptr) == '^') ptr++;
+
+    /* Written as a "do" so that an initial ']' is taken as data */
+
+    if (*ptr != 0) do
+      {
+      /* Inside \Q...\E everything is literal except \E */
+
+      if (inescq)
+        {
+        if (*ptr != '\\' || ptr[1] != 'E') goto NON_SPECIAL_CHARACTER;
+        inescq = FALSE;
+        ptr += 1;
+        continue;
+        }
+
+      /* Outside \Q...\E, check for escapes */
+
+      if (*ptr == '\\')
+        {
+#ifdef SUPPORT_UTF8
+        int prevchar = ptr[-1];
+#endif
+        int ch = check_escape(&ptr, errorptr, bracount, options, TRUE);
+        if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+
+        /* \b is backspace inside a class */
+
+        if (-ch == ESC_b) ch = '\b';
+
+        /* \Q enters quoting mode */
+
+        if (-ch == ESC_Q)
+          {
+          inescq = TRUE;
+          continue;
+          }
+
+        /* Handle escapes that turn into characters */
+
+        if (ch >= 0)
+          {
+#ifdef SUPPORT_UTF8
+          if (utf8)
+            {
+            if (ch > 127) class_optcount = 10;  /* Ensure > 1 */
+            if (ch > 255)
+              {
+              uschar buffer[6];
+              if (!class_utf8)
+                {
+                class_utf8 = TRUE;
+                length += LINK_SIZE + 1 + 1;
+                }
+              length += 1 + ord2utf8(ch, buffer);
+
+              /* If this wide character is preceded by '-', add an extra 2 to
+              the length in case the previous character was < 128, because in
+              this case the whole range will be put into the list. */
+
+              if (prevchar == '-') length += 2;
+              }
+            }
+#endif
+          class_optcount++;            /* for possible optimization */
+          }
+        else class_optcount = 10;      /* \d, \s etc; make sure > 1 */
+        }
+
+      /* Check the syntax for POSIX stuff. The bits we actually handle are
+      checked during the real compile phase. */
+
+      else if (*ptr == '[' && check_posix_syntax(ptr, &ptr, &compile_block))
+        {
+        ptr++;
+        class_optcount = 10;    /* Make sure > 1 */
+        }
+
+      /* Anything else just increments the possible optimization count. If
+      there are wide characters, we are going to have to use an XCLASS. */
+
+      else
+        {
+        NON_SPECIAL_CHARACTER:
+        class_optcount++;
+
+#ifdef SUPPORT_UTF8
+        if (utf8)
+          {
+          int ch;
+          int extra = 0;
+          GETCHARLEN(ch, ptr, extra);
+          if (ch > 127) class_optcount = 10;   /* No optimization possible */
+          if (ch > 255)
+            {
+            if (!class_utf8)
+              {
+              class_utf8 = TRUE;
+              length += LINK_SIZE + 1 + 1;
+              }
+            length += 2 + extra;
+
+            /* If this wide character is preceded by '-', add an extra 2 to
+            the length in case the previous character was < 128, because in
+            this case the whole range will be put into the list. */
+
+            if (ptr[-1] == '-') length += 2;
+
+            /* Advance to the end of this character */
+
+            ptr += extra;
+            }
+          }
+#endif
+        }
+      }
+    while (*(++ptr) != 0 && (inescq || *ptr != ']')); /* Concludes "do" above */
+
+    if (*ptr == 0)                          /* Missing terminating ']' */
+      {
+      *errorptr = ERR6;
+      goto PCRE_ERROR_RETURN;
+      }
+
+    /* We can optimize when there was only one optimizable character. Repeats
+    for positive and negated single one-byte chars are handled by the general
+    code. Here, we handle repeats for the class opcodes. */
+
+    if (class_optcount == 1) length += 3; else
+      {
+      length += 33;
+
+      /* A repeat needs either 1 or 5 bytes. If it is a possessive quantifier,
+      we also need extra for wrapping the whole thing in a sub-pattern. */
+
+      if (*ptr != 0 && ptr[1] == '{' && is_counted_repeat(ptr+2))
+        {
+        ptr = read_repeat_counts(ptr+2, &min, &max, errorptr);
+        if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+        if ((min == 0 && (max == 1 || max == -1)) ||
+          (min == 1 && max == -1))
+            length++;
+        else length += 5;
+        if (ptr[1] == '+')
+          {
+          ptr++;
+          length += 2 + 2*LINK_SIZE;
+          }
+        else if (ptr[1] == '?') ptr++;
+        }
+      }
+    continue;
+
+    /* Brackets may be genuine groups or special things */
+
+    case '(':
+    branch_newextra = 0;
+    bracket_length = 1 + LINK_SIZE;
+
+    /* Handle special forms of bracket, which all start (? */
+
+    if (ptr[1] == '?')
+      {
+      int set, unset;
+      int *optset;
+
+      switch (c = ptr[2])
+        {
+        /* Skip over comments entirely */
+        case '#':
+        ptr += 3;
+        while (*ptr != 0 && *ptr != ')') ptr++;
+        if (*ptr == 0)
+          {
+          *errorptr = ERR18;
+          goto PCRE_ERROR_RETURN;
+          }
+        continue;
+
+        /* Non-referencing groups and lookaheads just move the pointer on, and
+        then behave like a non-special bracket, except that they don't increment
+        the count of extracting brackets. Ditto for the "once only" bracket,
+        which is in Perl from version 5.005. */
+
+        case ':':
+        case '=':
+        case '!':
+        case '>':
+        ptr += 2;
+        break;
+
+        /* (?R) specifies a recursive call to the regex, which is an extension
+        to provide the facility which can be obtained by (?p{perl-code}) in
+        Perl 5.6. In Perl 5.8 this has become (??{perl-code}).
+
+        From PCRE 4.00, items such as (?3) specify subroutine-like "calls" to
+        the appropriate numbered brackets. This includes both recursive and
+        non-recursive calls. (?R) is now synonymous with (?0). */
+
+        case 'R':
+        ptr++;
+
+        case '0': case '1': case '2': case '3': case '4':
+        case '5': case '6': case '7': case '8': case '9':
+        ptr += 2;
+        if (c != 'R')
+          while ((digitab[*(++ptr)] & ctype_digit) != 0);
+        if (*ptr != ')')
+          {
+          *errorptr = ERR29;
+          goto PCRE_ERROR_RETURN;
+          }
+        length += 1 + LINK_SIZE;
+
+        /* If this item is quantified, it will get wrapped inside brackets so
+        as to use the code for quantified brackets. We jump down and use the
+        code that handles this for real brackets. */
+
+        if (ptr[1] == '+' || ptr[1] == '*' || ptr[1] == '?' || ptr[1] == '{')
+          {
+          length += 2 + 2 * LINK_SIZE;       /* to make bracketed */
+          duplength = 5 + 3 * LINK_SIZE;
+          goto HANDLE_QUANTIFIED_BRACKETS;
+          }
+        continue;
+
+        /* (?C) is an extension which provides "callout" - to provide a bit of
+        the functionality of the Perl (?{...}) feature. An optional number may
+        follow (default is zero). */
+
+        case 'C':
+        ptr += 2;
+        while ((digitab[*(++ptr)] & ctype_digit) != 0);
+        if (*ptr != ')')
+          {
+          *errorptr = ERR39;
+          goto PCRE_ERROR_RETURN;
+          }
+        length += 2;
+        continue;
+
+        /* Named subpatterns are an extension copied from Python */
+
+        case 'P':
+        ptr += 3;
+        if (*ptr == '<')
+          {
+          const uschar *p;    /* Don't amalgamate; some compilers */
+          p = ++ptr;          /* grumble at autoincrement in declaration */
+          while ((compile_block.ctypes[*ptr] & ctype_word) != 0) ptr++;
+          if (*ptr != '>')
+            {
+            *errorptr = ERR42;
+            goto PCRE_ERROR_RETURN;
+            }
+          name_count++;
+          if (ptr - p > max_name_size) max_name_size = (ptr - p);
+          break;
+          }
+
+        if (*ptr == '=' || *ptr == '>')
+          {
+          while ((compile_block.ctypes[*(++ptr)] & ctype_word) != 0);
+          if (*ptr != ')')
+            {
+            *errorptr = ERR42;
+            goto PCRE_ERROR_RETURN;
+            }
+          break;
+          }
+
+        /* Unknown character after (?P */
+
+        *errorptr = ERR41;
+        goto PCRE_ERROR_RETURN;
+
+        /* Lookbehinds are in Perl from version 5.005 */
+
+        case '<':
+        ptr += 3;
+        if (*ptr == '=' || *ptr == '!')
+          {
+          branch_newextra = 1 + LINK_SIZE;
+          length += 1 + LINK_SIZE;         /* For the first branch */
+          break;
+          }
+        *errorptr = ERR24;
+        goto PCRE_ERROR_RETURN;
+
+        /* Conditionals are in Perl from version 5.005. The bracket must either
+        be followed by a number (for bracket reference) or by an assertion
+        group, or (a PCRE extension) by 'R' for a recursion test. */
+
+        case '(':
+        if (ptr[3] == 'R' && ptr[4] == ')')
+          {
+          ptr += 4;
+          length += 3;
+          }
+        else if ((digitab[ptr[3]] & ctype_digit) != 0)
+          {
+          ptr += 4;
+          length += 3;
+          while ((digitab[*ptr] & ctype_digit) != 0) ptr++;
+          if (*ptr != ')')
+            {
+            *errorptr = ERR26;
+            goto PCRE_ERROR_RETURN;
+            }
+          }
+        else   /* An assertion must follow */
+          {
+          ptr++;   /* Can treat like ':' as far as spacing is concerned */
+          if (ptr[2] != '?' ||
+             (ptr[3] != '=' && ptr[3] != '!' && ptr[3] != '<') )
+            {
+            ptr += 2;    /* To get right offset in message */
+            *errorptr = ERR28;
+            goto PCRE_ERROR_RETURN;
+            }
+          }
+        break;
+
+        /* Else loop checking valid options until ) is met. Anything else is an
+        error. If we are without any brackets, i.e. at top level, the settings
+        act as if specified in the options, so massage the options immediately.
+        This is for backward compatibility with Perl 5.004. */
+
+        default:
+        set = unset = 0;
+        optset = &set;
+        ptr += 2;
+
+        for (;; ptr++)
+          {
+          c = *ptr;
+          switch (c)
+            {
+            case 'i':
+            *optset |= PCRE_CASELESS;
+            continue;
+
+            case 'm':
+            *optset |= PCRE_MULTILINE;
+            continue;
+
+            case 's':
+            *optset |= PCRE_DOTALL;
+            continue;
+
+            case 'x':
+            *optset |= PCRE_EXTENDED;
+            continue;
+
+            case 'X':
+            *optset |= PCRE_EXTRA;
+            continue;
+
+            case 'U':
+            *optset |= PCRE_UNGREEDY;
+            continue;
+
+            case '-':
+            optset = &unset;
+            continue;
+
+            /* A termination by ')' indicates an options-setting-only item; if
+            this is at the very start of the pattern (indicated by item_count
+            being zero), we use it to set the global options. This is helpful
+            when analyzing the pattern for first characters, etc. Otherwise
+            nothing is done here and it is handled during the compiling
+            process.
+
+            [Historical note: Up to Perl 5.8, options settings at top level
+            were always global settings, wherever they appeared in the pattern.
+            That is, they were equivalent to an external setting. From 5.8
+            onwards, they apply only to what follows (which is what you might
+            expect).] */
+
+            case ')':
+            if (item_count == 0)
+              {
+              options = (options | set) & (~unset);
+              set = unset = 0;     /* To save length */
+              item_count--;        /* To allow for several */
+              }
+
+            /* Fall through */
+
+            /* A termination by ':' indicates the start of a nested group with
+            the given options set. This is again handled at compile time, but
+            we must allow for compiled space if any of the ims options are
+            set. We also have to allow for resetting space at the end of
+            the group, which is why 4 is added to the length and not just 2.
+            If there are several changes of options within the same group, this
+            will lead to an over-estimate on the length, but this shouldn't
+            matter very much. We also have to allow for resetting options at
+            the start of any alternations, which we do by setting
+            branch_newextra to 2. Finally, we record whether the case-dependent
+            flag ever changes within the regex. This is used by the "required
+            character" code. */
+
+            case ':':
+            if (((set|unset) & PCRE_IMS) != 0)
+              {
+              length += 4;
+              branch_newextra = 2;
+              if (((set|unset) & PCRE_CASELESS) != 0) options |= PCRE_ICHANGED;
+              }
+            goto END_OPTIONS;
+
+            /* Unrecognized option character */
+
+            default:
+            *errorptr = ERR12;
+            goto PCRE_ERROR_RETURN;
+            }
+          }
+
+        /* If we hit a closing bracket, that's it - this is a freestanding
+        option-setting. We need to ensure that branch_extra is updated if
+        necessary. The only values branch_newextra can have here are 0 or 2.
+        If the value is 2, then branch_extra must either be 2 or 5, depending
+        on whether this is a lookbehind group or not. */
+
+        END_OPTIONS:
+        if (c == ')')
+          {
+          if (branch_newextra == 2 &&
+              (branch_extra == 0 || branch_extra == 1+LINK_SIZE))
+            branch_extra += branch_newextra;
+          continue;
+          }
+
+        /* If options were terminated by ':' control comes here. Fall through
+        to handle the group below. */
+        }
+      }
+
+    /* Extracting brackets must be counted so we can process escapes in a
+    Perlish way. If the number exceeds EXTRACT_BASIC_MAX we are going to
+    need an additional 3 bytes of store per extracting bracket. However, if
+    PCRE_NO_AUTO)CAPTURE is set, unadorned brackets become non-capturing, so we
+    must leave the count alone (it will aways be zero). */
+
+    else if ((options & PCRE_NO_AUTO_CAPTURE) == 0)
+      {
+      bracount++;
+      if (bracount > EXTRACT_BASIC_MAX) bracket_length += 3;
+      }
+
+    /* Save length for computing whole length at end if there's a repeat that
+    requires duplication of the group. Also save the current value of
+    branch_extra, and start the new group with the new value. If non-zero, this
+    will either be 2 for a (?imsx: group, or 3 for a lookbehind assertion. */
+
+    if (brastackptr >= sizeof(brastack)/sizeof(int))
+      {
+      *errorptr = ERR19;
+      goto PCRE_ERROR_RETURN;
+      }
+
+    bralenstack[brastackptr] = branch_extra;
+    branch_extra = branch_newextra;
+
+    brastack[brastackptr++] = length;
+    length += bracket_length;
+    continue;
+
+    /* Handle ket. Look for subsequent max/min; for certain sets of values we
+    have to replicate this bracket up to that many times. If brastackptr is
+    0 this is an unmatched bracket which will generate an error, but take care
+    not to try to access brastack[-1] when computing the length and restoring
+    the branch_extra value. */
+
+    case ')':
+    length += 1 + LINK_SIZE;
+    if (brastackptr > 0)
+      {
+      duplength = length - brastack[--brastackptr];
+      branch_extra = bralenstack[brastackptr];
+      }
+    else duplength = 0;
+
+    /* The following code is also used when a recursion such as (?3) is
+    followed by a quantifier, because in that case, it has to be wrapped inside
+    brackets so that the quantifier works. The value of duplength must be
+    set before arrival. */
+
+    HANDLE_QUANTIFIED_BRACKETS:
+
+    /* Leave ptr at the final char; for read_repeat_counts this happens
+    automatically; for the others we need an increment. */
+
+    if ((c = ptr[1]) == '{' && is_counted_repeat(ptr+2))
+      {
+      ptr = read_repeat_counts(ptr+2, &min, &max, errorptr);
+      if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+      }
+    else if (c == '*') { min = 0; max = -1; ptr++; }
+    else if (c == '+') { min = 1; max = -1; ptr++; }
+    else if (c == '?') { min = 0; max = 1;  ptr++; }
+    else { min = 1; max = 1; }
+
+    /* If the minimum is zero, we have to allow for an OP_BRAZERO before the
+    group, and if the maximum is greater than zero, we have to replicate
+    maxval-1 times; each replication acquires an OP_BRAZERO plus a nesting
+    bracket set. */
+
+    if (min == 0)
+      {
+      length++;
+      if (max > 0) length += (max - 1) * (duplength + 3 + 2*LINK_SIZE);
+      }
+
+    /* When the minimum is greater than zero, we have to replicate up to
+    minval-1 times, with no additions required in the copies. Then, if there
+    is a limited maximum we have to replicate up to maxval-1 times allowing
+    for a BRAZERO item before each optional copy and nesting brackets for all
+    but one of the optional copies. */
+
+    else
+      {
+      length += (min - 1) * duplength;
+      if (max > min)   /* Need this test as max=-1 means no limit */
+        length += (max - min) * (duplength + 3 + 2*LINK_SIZE)
+          - (2 + 2*LINK_SIZE);
+      }
+
+    /* Allow space for once brackets for "possessive quantifier" */
+
+    if (ptr[1] == '+')
+      {
+      ptr++;
+      length += 2 + 2*LINK_SIZE;
+      }
+    continue;
+
+    /* Non-special character. For a run of such characters the length required
+    is the number of characters + 2, except that the maximum run length is
+    MAXLIT. We won't get a skipped space or a non-data escape or the start of a
+    # comment as the first character, so the length can't be zero. */
+
+    NORMAL_CHAR:
+    default:
+    length += 2;
+    runlength = 0;
+    do
+      {
+#ifdef SUPPORT_UTF8
+      lastcharlength = 1;     /* Need length of last char for UTF-8 repeats */
+#endif
+
+      /* If in a \Q...\E sequence, check for end; otherwise it's a literal */
+      if (inescq)
+        {
+        if (c == '\\' && ptr[1] == 'E')
+          {
+          inescq = FALSE;
+          ptr++;
+          }
+        else runlength++;
+        continue;
+        }
+
+      /* Skip whitespace and comments for /x */
+
+      if ((options & PCRE_EXTENDED) != 0)
+        {
+        if ((compile_block.ctypes[c] & ctype_space) != 0) continue;
+        if (c == '#')
+          {
+          /* The space before the ; is to avoid a warning on a silly compiler
+          on the Macintosh. */
+          while ((c = *(++ptr)) != 0 && c != NEWLINE) ;
+          continue;
+          }
+        }
+
+      /* Backslash may introduce a data char or a metacharacter; stop the
+      string before the latter. */
+
+      if (c == '\\')
+        {
+        const uschar *saveptr = ptr;
+        c = check_escape(&ptr, errorptr, bracount, options, FALSE);
+        if (*errorptr != NULL) goto PCRE_ERROR_RETURN;
+        if (c < 0) { ptr = saveptr; break; }
+
+        /* In UTF-8 mode, add on the number of additional bytes needed to
+        encode this character, and save the total length in case this is a
+        final char that is repeated. */
+
+#ifdef SUPPORT_UTF8
+        if (utf8 && c > 127)
+          {
+          int i;
+          for (i = 0; i < sizeof(utf8_table1)/sizeof(int); i++)
+            if (c <= utf8_table1[i]) break;
+          runlength += i;
+          lastcharlength += i;
+          }
+#endif
+        }
+
+      /* Ordinary character or single-char escape */
+
+      runlength++;
+      }
+
+    /* This "while" is the end of the "do" above. */
+
+    while (runlength < MAXLIT &&
+      (compile_block.ctypes[c = *(++ptr)] & ctype_meta) == 0);
+
+    /* If we hit a meta-character, back off to point to it */
+
+    if (runlength < MAXLIT) ptr--;
+
+    /* If the last char in the string is a UTF-8 multibyte character, we must
+    set lastcharlength correctly. If it was specified as an escape, this will
+    already have been done above. However, we also have to support in-line
+    UTF-8 characters, so check backwards from where we are. */
+
+#ifdef SUPPORT_UTF8
+    if (utf8)
+      {
+      const uschar *lastptr = ptr - 1;
+      if ((*lastptr & 0x80) != 0)
+        {
+        while((*lastptr & 0xc0) == 0x80) lastptr--;
+        lastcharlength = ptr - lastptr;
+        }
+      }
+#endif
+
+    length += runlength;
+    continue;
+    }
+  }
+
+length += 2 + LINK_SIZE;    /* For final KET and END */
+
+if (length > MAX_PATTERN_SIZE)
+  {
+  *errorptr = ERR20;
+  return NULL;
+  }
+
+/* Compute the size of data block needed and get it, either from malloc or
+externally provided function. */
+
+size = length + sizeof(real_pcre) + name_count * (max_name_size + 3);
+re = (real_pcre *)(pcre_malloc)(size);
+
+if (re == NULL)
+  {
+  *errorptr = ERR21;
+  return NULL;
+  }
+
+/* Put in the magic number, and save the size, options, and table pointer */
+
+re->magic_number = MAGIC_NUMBER;
+re->size = size;
+re->options = options;
+re->tables = tables;
+re->name_entry_size = max_name_size + 3;
+re->name_count = name_count;
+
+/* The starting points of the name/number translation table and of the code are
+passed around in the compile data block. */
+
+compile_block.names_found = 0;
+compile_block.name_entry_size = max_name_size + 3;
+compile_block.name_table = (uschar *)re + sizeof(real_pcre);
+codestart = compile_block.name_table + re->name_entry_size * re->name_count;
+compile_block.start_code = codestart;
+compile_block.req_varyopt = 0;
+
+/* Set up a starting, non-extracting bracket, then compile the expression. On
+error, *errorptr will be set non-NULL, so we don't need to look at the result
+of the function here. */
+
+ptr = (const uschar *)pattern;
+code = (uschar *)codestart;
+*code = OP_BRA;
+bracount = 0;
+(void)compile_regex(options, options & PCRE_IMS, &bracount, &code, &ptr,
+  errorptr, FALSE, 0, &firstbyte, &reqbyte, NULL, &compile_block);
+re->top_bracket = bracount;
+re->top_backref = compile_block.top_backref;
+
+/* If not reached end of pattern on success, there's an excess bracket. */
+
+if (*errorptr == NULL && *ptr != 0) *errorptr = ERR22;
+
+/* Fill in the terminating state and check for disastrous overflow, but
+if debugging, leave the test till after things are printed out. */
+
+*code++ = OP_END;
+
+#ifndef DEBUG
+if (code - codestart > length) *errorptr = ERR23;
+#endif
+
+/* Give an error if there's back reference to a non-existent capturing
+subpattern. */
+
+if (re->top_backref > re->top_bracket) *errorptr = ERR15;
+
+/* Failed to compile, or error while post-processing */
+
+if (*errorptr != NULL)
+  {
+  (pcre_free)(re);
+  PCRE_ERROR_RETURN:
+  *erroroffset = ptr - (const uschar *)pattern;
+  return NULL;
+  }
+
+/* If the anchored option was not passed, set the flag if we can determine that
+the pattern is anchored by virtue of ^ characters or \A or anything else (such
+as starting with .* when DOTALL is set).
+
+Otherwise, if we know what the first character has to be, save it, because that
+speeds up unanchored matches no end. If not, see if we can set the
+PCRE_STARTLINE flag. This is helpful for multiline matches when all branches
+start with ^. and also when all branches start with .* for non-DOTALL matches.
+*/
+
+if ((options & PCRE_ANCHORED) == 0)
+  {
+  int temp_options = options;
+  if (is_anchored(codestart, &temp_options, 0, compile_block.backref_map))
+    re->options |= PCRE_ANCHORED;
+  else
+    {
+    if (firstbyte < 0)
+      firstbyte = find_firstassertedchar(codestart, &temp_options, FALSE);
+    if (firstbyte >= 0)   /* Remove caseless flag for non-caseable chars */
+      {
+      int ch = firstbyte & 255;
+      re->first_byte = ((firstbyte & REQ_CASELESS) != 0 &&
+         compile_block.fcc[ch] == ch)? ch : firstbyte;
+      re->options |= PCRE_FIRSTSET;
+      }
+    else if (is_startline(codestart, 0, compile_block.backref_map))
+      re->options |= PCRE_STARTLINE;
+    }
+  }
+
+/* For an anchored pattern, we use the "required byte" only if it follows a
+variable length item in the regex. Remove the caseless flag for non-caseable
+chars. */
+
+if (reqbyte >= 0 &&
+     ((re->options & PCRE_ANCHORED) == 0 || (reqbyte & REQ_VARY) != 0))
+  {
+  int ch = reqbyte & 255;
+  re->req_byte = ((reqbyte & REQ_CASELESS) != 0 &&
+    compile_block.fcc[ch] == ch)? (reqbyte & ~REQ_CASELESS) : reqbyte;
+  re->options |= PCRE_REQCHSET;
+  }
+
+/* Print out the compiled data for debugging */
+
+#ifdef DEBUG
+
+printf("Length = %d top_bracket = %d top_backref = %d\n",
+  length, re->top_bracket, re->top_backref);
+
+if (re->options != 0)
+  {
+  printf("%s%s%s%s%s%s%s%s%s\n",
+    ((re->options & PCRE_ANCHORED) != 0)? "anchored " : "",
+    ((re->options & PCRE_CASELESS) != 0)? "caseless " : "",
+    ((re->options & PCRE_ICHANGED) != 0)? "case state changed " : "",
+    ((re->options & PCRE_EXTENDED) != 0)? "extended " : "",
+    ((re->options & PCRE_MULTILINE) != 0)? "multiline " : "",
+    ((re->options & PCRE_DOTALL) != 0)? "dotall " : "",
+    ((re->options & PCRE_DOLLAR_ENDONLY) != 0)? "endonly " : "",
+    ((re->options & PCRE_EXTRA) != 0)? "extra " : "",
+    ((re->options & PCRE_UNGREEDY) != 0)? "ungreedy " : "");
+  }
+
+if ((re->options & PCRE_FIRSTSET) != 0)
+  {
+  int ch = re->first_byte & 255;
+  const char *caseless = ((re->first_byte & REQ_CASELESS) == 0)? "" : " (caseless)";
+  if (isprint(ch)) printf("First char = %c%s\n", ch, caseless);
+    else printf("First char = \\x%02x%s\n", ch, caseless);
+  }
+
+if ((re->options & PCRE_REQCHSET) != 0)
+  {
+  int ch = re->req_byte & 255;
+  const char *caseless = ((re->req_byte & REQ_CASELESS) == 0)? "" : " (caseless)";
+  if (isprint(ch)) printf("Req char = %c%s\n", ch, caseless);
+    else printf("Req char = \\x%02x%s\n", ch, caseless);
+  }
+
+print_internals(re, stdout);
+
+/* This check is done here in the debugging case so that the code that
+was compiled can be seen. */
+
+if (code - codestart > length)
+  {
+  *errorptr = ERR23;
+  (pcre_free)(re);
+  *erroroffset = ptr - (uschar *)pattern;
+  return NULL;
+  }
+#endif
+
+return (pcre *)re;
+}
+
+
+
+/*************************************************
+*          Match a back-reference                *
+*************************************************/
+
+/* If a back reference hasn't been set, the length that is passed is greater
+than the number of characters left in the string, so the match fails.
+
+Arguments:
+  offset      index into the offset vector
+  eptr        points into the subject
+  length      length to be matched
+  md          points to match data block
+  ims         the ims flags
+
+Returns:      TRUE if matched
+*/
+
+static BOOL
+match_ref(int offset, register const uschar *eptr, int length, match_data *md,
+  unsigned long int ims)
+{
+const uschar *p = md->start_subject + md->offset_vector[offset];
+
+#ifdef DEBUG
+if (eptr >= md->end_subject)
+  printf("matching subject <null>");
+else
+  {
+  printf("matching subject ");
+  pchars(eptr, length, TRUE, md);
+  }
+printf(" against backref ");
+pchars(p, length, FALSE, md);
+printf("\n");
+#endif
+
+/* Always fail if not enough characters left */
+
+if (length > md->end_subject - eptr) return FALSE;
+
+/* Separate the caselesss case for speed */
+
+if ((ims & PCRE_CASELESS) != 0)
+  {
+  while (length-- > 0)
+    if (md->lcc[*p++] != md->lcc[*eptr++]) return FALSE;
+  }
+else
+  { while (length-- > 0) if (*p++ != *eptr++) return FALSE; }
+
+return TRUE;
+}
+
+
+#ifdef SUPPORT_UTF8
+/*************************************************
+*       Match character against an XCLASS        *
+*************************************************/
+
+/* This function is called from within the XCLASS code below, to match a
+character against an extended class which might match values > 255.
+
+Arguments:
+  c           the character
+  data        points to the flag byte of the XCLASS data
+
+Returns:      TRUE if character matches, else FALSE
+*/
+
+static BOOL
+match_xclass(int c, const uschar *data)
+{
+int t;
+BOOL negated = (*data & XCL_NOT) != 0;
+
+/* Character values < 256 are matched against a bitmap, if one is present. If
+not, we still carry on, because there may be ranges that start below 256 in the
+additional data. */
+
+if (c < 256)
+  {
+  if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0)
+    return !negated;   /* char found */
+  }
+
+/* Now match against the list of large chars or ranges that end with a large
+char. First skip the bit map if present. */
+
+if ((*data++ & XCL_MAP) != 0) data += 32;
+
+while ((t = *data++) != XCL_END)
+  {
+  int x, y;
+  GETCHARINC(x, data);
+  if (t == XCL_SINGLE)
+    {
+    if (c == x) return !negated;
+    }
+  else
+    {
+    GETCHARINC(y, data);
+    if (c >= x && c <= y) return !negated;
+    }
+  }
+
+return negated;   /* char was not found */
+}
+#endif
+
+
+/***************************************************************************
+****************************************************************************
+                   RECURSION IN THE match() FUNCTION
+
+The match() function is highly recursive. Some regular expressions can cause
+it to recurse thousands of times. I was writing for Unix, so I just let it
+call itself recursively. This uses the stack for saving everything that has
+to be saved for a recursive call. On Unix, the stack can be large, and this
+works fine.
+
+It turns out that on non-Unix systems there are problems with programs that
+use a lot of stack. (This despite the fact that every last chip has oodles
+of memory these days, and techniques for extending the stack have been known
+for decades.) So....
+
+There is a fudge, triggered by defining NO_RECURSE, which avoids recursive
+calls by keeping local variables that need to be preserved in blocks of memory
+obtained from malloc instead instead of on the stack. Macros are used to
+achieve this so that the actual code doesn't look very different to what it
+always used to.
+****************************************************************************
+***************************************************************************/
+
+
+/* These versions of the macros use the stack, as normal */
+
+#ifndef NO_RECURSE
+#define REGISTER register
+#define RMATCH(rx,ra,rb,rc,rd,re,rf,rg) rx = match(ra,rb,rc,rd,re,rf,rg)
+#define RRETURN(ra) return ra
+#else
+
+
+/* These versions of the macros manage a private stack on the heap. Note
+that the rd argument of RMATCH isn't actually used. It's the md argument of
+match(), which never actually changes. */
+
+#define REGISTER
+
+#define RMATCH(rx,ra,rb,rc,rd,re,rf,rg)\
+  {\
+  heapframe *newframe = (pcre_stack_malloc)(sizeof(heapframe));\
+  if (setjmp(frame->Xwhere) == 0)\
+    {\
+    newframe->Xeptr = ra;\
+    newframe->Xecode = rb;\
+    newframe->Xoffset_top = rc;\
+    newframe->Xims = re;\
+    newframe->Xeptrb = rf;\
+    newframe->Xflags = rg;\
+    newframe->Xprevframe = frame;\
+    frame = newframe;\
+    DPRINTF(("restarting from line %d\n", __LINE__));\
+    goto HEAP_RECURSE;\
+    }\
+  else\
+    {\
+    DPRINTF(("longjumped back to line %d\n", __LINE__));\
+    frame = md->thisframe;\
+    rx = frame->Xresult;\
+    }\
+  }
+
+#define RRETURN(ra)\
+  {\
+  heapframe *newframe = frame;\
+  frame = newframe->Xprevframe;\
+  (pcre_stack_free)(newframe);\
+  if (frame != NULL)\
+    {\
+    frame->Xresult = ra;\
+    md->thisframe = frame;\
+    longjmp(frame->Xwhere, 1);\
+    }\
+  return ra;\
+  }
+
+
+/* Structure for remembering the local variables in a private frame */
+
+typedef struct heapframe {
+  struct heapframe *Xprevframe;
+
+  /* Function arguments that may change */
+
+  const uschar *Xeptr;
+  const uschar *Xecode;
+  int Xoffset_top;
+  long int Xims;
+  eptrblock *Xeptrb;
+  int Xflags;
+
+  /* Function local variables */
+
+  const uschar *Xcallpat;
+  const uschar *Xcharptr;
+  const uschar *Xdata;
+  const uschar *Xlastptr;
+  const uschar *Xnext;
+  const uschar *Xpp;
+  const uschar *Xprev;
+  const uschar *Xsaved_eptr;
+
+  recursion_info Xnew_recursive;
+
+  BOOL Xcur_is_word;
+  BOOL Xcondition;
+  BOOL Xminimize;
+  BOOL Xprev_is_word;
+
+  unsigned long int Xoriginal_ims;
+
+  int Xctype;
+  int Xfc;
+  int Xfi;
+  int Xlength;
+  int Xmax;
+  int Xmin;
+  int Xnumber;
+  int Xoffset;
+  int Xop;
+  int Xsave_capture_last;
+  int Xsave_offset1, Xsave_offset2, Xsave_offset3;
+  int Xstacksave[REC_STACK_SAVE_MAX];
+
+  eptrblock Xnewptrb;
+
+  /* Place to pass back result, and where to jump back to */
+
+  int  Xresult;
+  jmp_buf Xwhere;
+
+} heapframe;
+
+#endif
+
+
+/***************************************************************************
+***************************************************************************/
+
+
+
+/*************************************************
+*         Match from current position            *
+*************************************************/
+
+/* On entry ecode points to the first opcode, and eptr to the first character
+in the subject string, while eptrb holds the value of eptr at the start of the
+last bracketed group - used for breaking infinite loops matching zero-length
+strings. This function is called recursively in many circumstances. Whenever it
+returns a negative (error) response, the outer incarnation must also return the
+same response.
+
+Performance note: It might be tempting to extract commonly used fields from the
+md structure (e.g. utf8, end_subject) into individual variables to improve
+performance. Tests using gcc on a SPARC disproved this; in the first case, it
+made performance worse.
+
+Arguments:
+   eptr        pointer in subject
+   ecode       position in code
+   offset_top  current top pointer
+   md          pointer to "static" info for the match
+   ims         current /i, /m, and /s options
+   eptrb       pointer to chain of blocks containing eptr at start of
+                 brackets - for testing for empty matches
+   flags       can contain
+                 match_condassert - this is an assertion condition
+                 match_isgroup - this is the start of a bracketed group
+
+Returns:       MATCH_MATCH if matched            )  these values are >= 0
+               MATCH_NOMATCH if failed to match  )
+               a negative PCRE_ERROR_xxx value if aborted by an error condition
+                 (e.g. stopped by recursion limit)
+*/
+
+static int
+match(REGISTER const uschar *eptr, REGISTER const uschar *ecode,
+  int offset_top, match_data *md, unsigned long int ims, eptrblock *eptrb,
+  int flags)
+{
+/* These variables do not need to be preserved over recursion in this function,
+so they can be ordinary variables in all cases. Mark them with "register"
+because they are used a lot in loops. */
+
+register int rrc;    /* Returns from recursive calls */
+register int i;      /* Used for loops not involving calls to RMATCH() */
+register int c;      /* Character values not kept over RMATCH() calls */
+
+/* When recursion is not being used, all "local" variables that have to be
+preserved over calls to RMATCH() are part of a "frame" which is obtained from
+heap storage. Set up the top-level frame here; others are obtained from the
+heap whenever RMATCH() does a "recursion". See the macro definitions above. */
+
+#ifdef NO_RECURSE
+heapframe *frame = (pcre_stack_malloc)(sizeof(heapframe));
+frame->Xprevframe = NULL;            /* Marks the top level */
+
+/* Copy in the original argument variables */
+
+frame->Xeptr = eptr;
+frame->Xecode = ecode;
+frame->Xoffset_top = offset_top;
+frame->Xims = ims;
+frame->Xeptrb = eptrb;
+frame->Xflags = flags;
+
+/* This is where control jumps back to to effect "recursion" */
+
+HEAP_RECURSE:
+
+/* Macros make the argument variables come from the current frame */
+
+#define eptr               frame->Xeptr
+#define ecode              frame->Xecode
+#define offset_top         frame->Xoffset_top
+#define ims                frame->Xims
+#define eptrb              frame->Xeptrb
+#define flags              frame->Xflags
+
+/* Ditto for the local variables */
+
+#define callpat            frame->Xcallpat
+#define charptr            frame->Xcharptr
+#define data               frame->Xdata
+#define lastptr            frame->Xlastptr
+#define next               frame->Xnext
+#define pp                 frame->Xpp
+#define prev               frame->Xprev
+#define saved_eptr         frame->Xsaved_eptr
+
+#define new_recursive      frame->Xnew_recursive
+
+#define cur_is_word        frame->Xcur_is_word
+#define condition          frame->Xcondition
+#define minimize           frame->Xminimize
+#define prev_is_word       frame->Xprev_is_word
+
+#define original_ims       frame->Xoriginal_ims
+
+#define ctype              frame->Xctype
+#define fc                 frame->Xfc
+#define fi                 frame->Xfi
+#define length             frame->Xlength
+#define max                frame->Xmax
+#define min                frame->Xmin
+#define number             frame->Xnumber
+#define offset             frame->Xoffset
+#define op                 frame->Xop
+#define save_capture_last  frame->Xsave_capture_last
+#define save_offset1       frame->Xsave_offset1
+#define save_offset2       frame->Xsave_offset2
+#define save_offset3       frame->Xsave_offset3
+#define stacksave          frame->Xstacksave
+
+#define newptrb            frame->Xnewptrb
+
+/* When recursion is being used, local variables are allocated on the stack and
+get preserved during recursion in the normal way. In this environment, fi and
+i, and fc and c, can be the same variables. */
+
+#else
+#define fi i
+#define fc c
+
+const uschar *callpat;             /* Many of these variables are used ony */
+const uschar *charptr;             /* small blocks of the code. My normal  */
+const uschar *data;                /* style of coding would have declared  */
+const uschar *lastptr;             /* them within each of those blocks.    */
+const uschar *next;                /* However, in order to accommodate the */
+const uschar *pp;                  /* version of this code that uses an    */
+const uschar *prev;                /* external "stack" implemented on the  */
+const uschar *saved_eptr;          /* heap, it is easier to declare them   */
+                                   /* all here, so the declarations can    */
+recursion_info new_recursive;      /* be cut out in a block. The only      */
+                                   /* declarations within blocks below are */
+BOOL cur_is_word;                  /* for variables that do not have to    */
+BOOL condition;                    /* be preserved over a recursive call   */
+BOOL minimize;                     /* to RMATCH().                         */
+BOOL prev_is_word;
+
+unsigned long int original_ims;
+
+int ctype;
+int length;
+int max;
+int min;
+int number;
+int offset;
+int op;
+int save_capture_last;
+int save_offset1, save_offset2, save_offset3;
+int stacksave[REC_STACK_SAVE_MAX];
+
+eptrblock newptrb;
+#endif
+
+
+/* OK, now we can get on with the real code of the function. Recursion is
+specified by the macros RMATCH and RRETURN. When NO_RECURSE is *not* defined,
+these just turn into a recursive call to match() and a "return", respectively.
+However, RMATCH isn't like a function call because it's quite a complicated
+macro. It has to be used in one particular way. This shouldn't, however, impact
+performance when true recursion is being used. */
+
+if (md->match_call_count++ >= md->match_limit) RRETURN(PCRE_ERROR_MATCHLIMIT);
+
+original_ims = ims;    /* Save for resetting on ')' */
+
+/* At the start of a bracketed group, add the current subject pointer to the
+stack of such pointers, to be re-instated at the end of the group when we hit
+the closing ket. When match() is called in other circumstances, we don't add to
+this stack. */
+
+if ((flags & match_isgroup) != 0)
+  {
+  newptrb.epb_prev = eptrb;
+  newptrb.epb_saved_eptr = eptr;
+  eptrb = &newptrb;
+  }
+
+/* Now start processing the operations. */
+
+for (;;)
+  {
+  op = *ecode;
+  minimize = FALSE;
+
+  /* Opening capturing bracket. If there is space in the offset vector, save
+  the current subject position in the working slot at the top of the vector. We
+  mustn't change the current values of the data slot, because they may be set
+  from a previous iteration of this group, and be referred to by a reference
+  inside the group.
+
+  If the bracket fails to match, we need to restore this value and also the
+  values of the final offsets, in case they were set by a previous iteration of
+  the same bracket.
+
+  If there isn't enough space in the offset vector, treat this as if it were a
+  non-capturing bracket. Don't worry about setting the flag for the error case
+  here; that is handled in the code for KET. */
+
+  if (op > OP_BRA)
+    {
+    number = op - OP_BRA;
+
+    /* For extended extraction brackets (large number), we have to fish out the
+    number from a dummy opcode at the start. */
+
+    if (number > EXTRACT_BASIC_MAX)
+      number = GET2(ecode, 2+LINK_SIZE);
+    offset = number << 1;
+
+#ifdef DEBUG
+    printf("start bracket %d subject=", number);
+    pchars(eptr, 16, TRUE, md);
+    printf("\n");
+#endif
+
+    if (offset < md->offset_max)
+      {
+      save_offset1 = md->offset_vector[offset];
+      save_offset2 = md->offset_vector[offset+1];
+      save_offset3 = md->offset_vector[md->offset_end - number];
+      save_capture_last = md->capture_last;
+
+      DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3));
+      md->offset_vector[md->offset_end - number] = eptr - md->start_subject;
+
+      do
+        {
+        RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+          match_isgroup);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        md->capture_last = save_capture_last;
+        ecode += GET(ecode, 1);
+        }
+      while (*ecode == OP_ALT);
+
+      DPRINTF(("bracket %d failed\n", number));
+
+      md->offset_vector[offset] = save_offset1;
+      md->offset_vector[offset+1] = save_offset2;
+      md->offset_vector[md->offset_end - number] = save_offset3;
+
+      RRETURN(MATCH_NOMATCH);
+      }
+
+    /* Insufficient room for saving captured contents */
+
+    else op = OP_BRA;
+    }
+
+  /* Other types of node can be handled by a switch */
+
+  switch(op)
+    {
+    case OP_BRA:     /* Non-capturing bracket: optimized */
+    DPRINTF(("start bracket 0\n"));
+    do
+      {
+      RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+        match_isgroup);
+      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+      ecode += GET(ecode, 1);
+      }
+    while (*ecode == OP_ALT);
+    DPRINTF(("bracket 0 failed\n"));
+    RRETURN(MATCH_NOMATCH);
+
+    /* Conditional group: compilation checked that there are no more than
+    two branches. If the condition is false, skipping the first branch takes us
+    past the end if there is only one branch, but that's OK because that is
+    exactly what going to the ket would do. */
+
+    case OP_COND:
+    if (ecode[LINK_SIZE+1] == OP_CREF) /* Condition extract or recurse test */
+      {
+      offset = GET2(ecode, LINK_SIZE+2) << 1;  /* Doubled ref number */
+      condition = (offset == CREF_RECURSE * 2)?
+        (md->recursive != NULL) :
+        (offset < offset_top && md->offset_vector[offset] >= 0);
+      RMATCH(rrc, eptr, ecode + (condition?
+        (LINK_SIZE + 4) : (LINK_SIZE + 1 + GET(ecode, 1))),
+        offset_top, md, ims, eptrb, match_isgroup);
+      RRETURN(rrc);
+      }
+
+    /* The condition is an assertion. Call match() to evaluate it - setting
+    the final argument TRUE causes it to stop at the end of an assertion. */
+
+    else
+      {
+      RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+          match_condassert | match_isgroup);
+      if (rrc == MATCH_MATCH)
+        {
+        ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE+2);
+        while (*ecode == OP_ALT) ecode += GET(ecode, 1);
+        }
+      else if (rrc != MATCH_NOMATCH)
+        {
+        RRETURN(rrc);         /* Need braces because of following else */
+        }
+      else ecode += GET(ecode, 1);
+      RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb,
+        match_isgroup);
+      RRETURN(rrc);
+      }
+    /* Control never reaches here */
+
+    /* Skip over conditional reference or large extraction number data if
+    encountered. */
+
+    case OP_CREF:
+    case OP_BRANUMBER:
+    ecode += 3;
+    break;
+
+    /* End of the pattern. If we are in a recursion, we should restore the
+    offsets appropriately and continue from after the call. */
+
+    case OP_END:
+    if (md->recursive != NULL && md->recursive->group_num == 0)
+      {
+      recursion_info *rec = md->recursive;
+      DPRINTF(("Hit the end in a (?0) recursion\n"));
+      md->recursive = rec->prevrec;
+      memmove(md->offset_vector, rec->offset_save,
+        rec->saved_max * sizeof(int));
+      md->start_match = rec->save_start;
+      ims = original_ims;
+      ecode = rec->after_call;
+      break;
+      }
+
+    /* Otherwise, if PCRE_NOTEMPTY is set, fail if we have matched an empty
+    string - backtracking will then try other alternatives, if any. */
+
+    if (md->notempty && eptr == md->start_match) RRETURN(MATCH_NOMATCH);
+    md->end_match_ptr = eptr;          /* Record where we ended */
+    md->end_offset_top = offset_top;   /* and how many extracts were taken */
+    RRETURN(MATCH_MATCH);
+
+    /* Change option settings */
+
+    case OP_OPT:
+    ims = ecode[1];
+    ecode += 2;
+    DPRINTF(("ims set to %02lx\n", ims));
+    break;
+
+    /* Assertion brackets. Check the alternative branches in turn - the
+    matching won't pass the KET for an assertion. If any one branch matches,
+    the assertion is true. Lookbehind assertions have an OP_REVERSE item at the
+    start of each branch to move the current point backwards, so the code at
+    this level is identical to the lookahead case. */
+
+    case OP_ASSERT:
+    case OP_ASSERTBACK:
+    do
+      {
+      RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+        match_isgroup);
+      if (rrc == MATCH_MATCH) break;
+      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+      ecode += GET(ecode, 1);
+      }
+    while (*ecode == OP_ALT);
+    if (*ecode == OP_KET) RRETURN(MATCH_NOMATCH);
+
+    /* If checking an assertion for a condition, return MATCH_MATCH. */
+
+    if ((flags & match_condassert) != 0) RRETURN(MATCH_MATCH);
+
+    /* Continue from after the assertion, updating the offsets high water
+    mark, since extracts may have been taken during the assertion. */
+
+    do ecode += GET(ecode,1); while (*ecode == OP_ALT);
+    ecode += 1 + LINK_SIZE;
+    offset_top = md->end_offset_top;
+    continue;
+
+    /* Negative assertion: all branches must fail to match */
+
+    case OP_ASSERT_NOT:
+    case OP_ASSERTBACK_NOT:
+    do
+      {
+      RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
+        match_isgroup);
+      if (rrc == MATCH_MATCH) RRETURN(MATCH_NOMATCH);
+      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+      ecode += GET(ecode,1);
+      }
+    while (*ecode == OP_ALT);
+
+    if ((flags & match_condassert) != 0) RRETURN(MATCH_MATCH);
+
+    ecode += 1 + LINK_SIZE;
+    continue;
+
+    /* Move the subject pointer back. This occurs only at the start of
+    each branch of a lookbehind assertion. If we are too close to the start to
+    move back, this match function fails. When working with UTF-8 we move
+    back a number of characters, not bytes. */
+
+    case OP_REVERSE:
+#ifdef SUPPORT_UTF8
+    if (md->utf8)
+      {
+      c = GET(ecode,1);
+      for (i = 0; i < c; i++)
+        {
+        eptr--;
+        if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
+        BACKCHAR(eptr)
+        }
+      }
+    else
+#endif
+
+    /* No UTF-8 support, or not in UTF-8 mode: count is byte count */
+
+      {
+      eptr -= GET(ecode,1);
+      if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
+      }
+
+    /* Skip to next op code */
+
+    ecode += 1 + LINK_SIZE;
+    break;
+
+    /* The callout item calls an external function, if one is provided, passing
+    details of the match so far. This is mainly for debugging, though the
+    function is able to force a failure. */
+
+    case OP_CALLOUT:
+    if (pcre_callout != NULL)
+      {
+      pcre_callout_block cb;
+      cb.version          = 0;   /* Version 0 of the callout block */
+      cb.callout_number   = ecode[1];
+      cb.offset_vector    = md->offset_vector;
+      cb.subject          = (const char *)md->start_subject;
+      cb.subject_length   = md->end_subject - md->start_subject;
+      cb.start_match      = md->start_match - md->start_subject;
+      cb.current_position = eptr - md->start_subject;
+      cb.capture_top      = offset_top/2;
+      cb.capture_last     = md->capture_last;
+      cb.callout_data     = md->callout_data;
+      if ((rrc = (*pcre_callout)(&cb)) > 0) RRETURN(MATCH_NOMATCH);
+      if (rrc < 0) RRETURN(rrc);
+      }
+    ecode += 2;
+    break;
+
+    /* Recursion either matches the current regex, or some subexpression. The
+    offset data is the offset to the starting bracket from the start of the
+    whole pattern. (This is so that it works from duplicated subpatterns.)
+
+    If there are any capturing brackets started but not finished, we have to
+    save their starting points and reinstate them after the recursion. However,
+    we don't know how many such there are (offset_top records the completed
+    total) so we just have to save all the potential data. There may be up to
+    65535 such values, which is too large to put on the stack, but using malloc
+    for small numbers seems expensive. As a compromise, the stack is used when
+    there are no more than REC_STACK_SAVE_MAX values to store; otherwise malloc
+    is used. A problem is what to do if the malloc fails ... there is no way of
+    returning to the top level with an error. Save the top REC_STACK_SAVE_MAX
+    values on the stack, and accept that the rest may be wrong.
+
+    There are also other values that have to be saved. We use a chained
+    sequence of blocks that actually live on the stack. Thanks to Robin Houston
+    for the original version of this logic. */
+
+    case OP_RECURSE:
+      {
+      callpat = md->start_code + GET(ecode, 1);
+      new_recursive.group_num = *callpat - OP_BRA;
+
+      /* For extended extraction brackets (large number), we have to fish out
+      the number from a dummy opcode at the start. */
+
+      if (new_recursive.group_num > EXTRACT_BASIC_MAX)
+        new_recursive.group_num = GET2(callpat, 2+LINK_SIZE);
+
+      /* Add to "recursing stack" */
+
+      new_recursive.prevrec = md->recursive;
+      md->recursive = &new_recursive;
+
+      /* Find where to continue from afterwards */
+
+      ecode += 1 + LINK_SIZE;
+      new_recursive.after_call = ecode;
+
+      /* Now save the offset data. */
+
+      new_recursive.saved_max = md->offset_end;
+      if (new_recursive.saved_max <= REC_STACK_SAVE_MAX)
+        new_recursive.offset_save = stacksave;
+      else
+        {
+        new_recursive.offset_save =
+          (int *)(pcre_malloc)(new_recursive.saved_max * sizeof(int));
+        if (new_recursive.offset_save == NULL) RRETURN(PCRE_ERROR_NOMEMORY);
+        }
+
+      memcpy(new_recursive.offset_save, md->offset_vector,
+            new_recursive.saved_max * sizeof(int));
+      new_recursive.save_start = md->start_match;
+      md->start_match = eptr;
+
+      /* OK, now we can do the recursion. For each top-level alternative we
+      restore the offset and recursion data. */
+
+      DPRINTF(("Recursing into group %d\n", new_recursive.group_num));
+      do
+        {
+        RMATCH(rrc, eptr, callpat + 1 + LINK_SIZE, offset_top, md, ims,
+            eptrb, match_isgroup);
+        if (rrc == MATCH_MATCH)
+          {
+          md->recursive = new_recursive.prevrec;
+          if (new_recursive.offset_save != stacksave)
+            (pcre_free)(new_recursive.offset_save);
+          RRETURN(MATCH_MATCH);
+          }
+        else if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+
+        md->recursive = &new_recursive;
+        memcpy(md->offset_vector, new_recursive.offset_save,
+            new_recursive.saved_max * sizeof(int));
+        callpat += GET(callpat, 1);
+        }
+      while (*callpat == OP_ALT);
+
+      DPRINTF(("Recursion didn't match\n"));
+      md->recursive = new_recursive.prevrec;
+      if (new_recursive.offset_save != stacksave)
+        (pcre_free)(new_recursive.offset_save);
+      RRETURN(MATCH_NOMATCH);
+      }
+    /* Control never reaches here */
+
+    /* "Once" brackets are like assertion brackets except that after a match,
+    the point in the subject string is not moved back. Thus there can never be
+    a move back into the brackets. Friedl calls these "atomic" subpatterns.
+    Check the alternative branches in turn - the matching won't pass the KET
+    for this kind of subpattern. If any one branch matches, we carry on as at
+    the end of a normal bracket, leaving the subject pointer. */
+
+    case OP_ONCE:
+      {
+      prev = ecode;
+      saved_eptr = eptr;
+
+      do
+        {
+        RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims,
+          eptrb, match_isgroup);
+        if (rrc == MATCH_MATCH) break;
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        ecode += GET(ecode,1);
+        }
+      while (*ecode == OP_ALT);
+
+      /* If hit the end of the group (which could be repeated), fail */
+
+      if (*ecode != OP_ONCE && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH);
+
+      /* Continue as from after the assertion, updating the offsets high water
+      mark, since extracts may have been taken. */
+
+      do ecode += GET(ecode,1); while (*ecode == OP_ALT);
+
+      offset_top = md->end_offset_top;
+      eptr = md->end_match_ptr;
+
+      /* For a non-repeating ket, just continue at this level. This also
+      happens for a repeating ket if no characters were matched in the group.
+      This is the forcible breaking of infinite loops as implemented in Perl
+      5.005. If there is an options reset, it will get obeyed in the normal
+      course of events. */
+
+      if (*ecode == OP_KET || eptr == saved_eptr)
+        {
+        ecode += 1+LINK_SIZE;
+        break;
+        }
+
+      /* The repeating kets try the rest of the pattern or restart from the
+      preceding bracket, in the appropriate order. We need to reset any options
+      that changed within the bracket before re-running it, so check the next
+      opcode. */
+
+      if (ecode[1+LINK_SIZE] == OP_OPT)
+        {
+        ims = (ims & ~PCRE_IMS) | ecode[4];
+        DPRINTF(("ims set to %02lx at group repeat\n", ims));
+        }
+
+      if (*ecode == OP_KETRMIN)
+        {
+        RMATCH(rrc, eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        }
+      else  /* OP_KETRMAX */
+        {
+        RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        }
+      }
+    RRETURN(MATCH_NOMATCH);
+
+    /* An alternation is the end of a branch; scan along to find the end of the
+    bracketed group and go to there. */
+
+    case OP_ALT:
+    do ecode += GET(ecode,1); while (*ecode == OP_ALT);
+    break;
+
+    /* BRAZERO and BRAMINZERO occur just before a bracket group, indicating
+    that it may occur zero times. It may repeat infinitely, or not at all -
+    i.e. it could be ()* or ()? in the pattern. Brackets with fixed upper
+    repeat limits are compiled as a number of copies, with the optional ones
+    preceded by BRAZERO or BRAMINZERO. */
+
+    case OP_BRAZERO:
+      {
+      next = ecode+1;
+      RMATCH(rrc, eptr, next, offset_top, md, ims, eptrb, match_isgroup);
+      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+      do next += GET(next,1); while (*next == OP_ALT);
+      ecode = next + 1+LINK_SIZE;
+      }
+    break;
+
+    case OP_BRAMINZERO:
+      {
+      next = ecode+1;
+      do next += GET(next,1); while (*next == OP_ALT);
+      RMATCH(rrc, eptr, next + 1+LINK_SIZE, offset_top, md, ims, eptrb,
+        match_isgroup);
+      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+      ecode++;
+      }
+    break;
+
+    /* End of a group, repeated or non-repeating. If we are at the end of
+    an assertion "group", stop matching and return MATCH_MATCH, but record the
+    current high water mark for use by positive assertions. Do this also
+    for the "once" (not-backup up) groups. */
+
+    case OP_KET:
+    case OP_KETRMIN:
+    case OP_KETRMAX:
+      {
+      prev = ecode - GET(ecode, 1);
+      saved_eptr = eptrb->epb_saved_eptr;
+
+      /* Back up the stack of bracket start pointers. */
+
+      eptrb = eptrb->epb_prev;
+
+      if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||
+          *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||
+          *prev == OP_ONCE)
+        {
+        md->end_match_ptr = eptr;      /* For ONCE */
+        md->end_offset_top = offset_top;
+        RRETURN(MATCH_MATCH);
+        }
+
+      /* In all other cases except a conditional group we have to check the
+      group number back at the start and if necessary complete handling an
+      extraction by setting the offsets and bumping the high water mark. */
+
+      if (*prev != OP_COND)
+        {
+        number = *prev - OP_BRA;
+
+        /* For extended extraction brackets (large number), we have to fish out
+        the number from a dummy opcode at the start. */
+
+        if (number > EXTRACT_BASIC_MAX) number = GET2(prev, 2+LINK_SIZE);
+        offset = number << 1;
+
+#ifdef DEBUG
+        printf("end bracket %d", number);
+        printf("\n");
+#endif
+
+        /* Test for a numbered group. This includes groups called as a result
+        of recursion. Note that whole-pattern recursion is coded as a recurse
+        into group 0, so it won't be picked up here. Instead, we catch it when
+        the OP_END is reached. */
+
+        if (number > 0)
+          {
+          md->capture_last = number;
+          if (offset >= md->offset_max) md->offset_overflow = TRUE; else
+            {
+            md->offset_vector[offset] =
+              md->offset_vector[md->offset_end - number];
+            md->offset_vector[offset+1] = eptr - md->start_subject;
+            if (offset_top <= offset) offset_top = offset + 2;
+            }
+
+          /* Handle a recursively called group. Restore the offsets
+          appropriately and continue from after the call. */
+
+          if (md->recursive != NULL && md->recursive->group_num == number)
+            {
+            recursion_info *rec = md->recursive;
+            DPRINTF(("Recursion (%d) succeeded - continuing\n", number));
+            md->recursive = rec->prevrec;
+            md->start_match = rec->save_start;
+            memcpy(md->offset_vector, rec->offset_save,
+              rec->saved_max * sizeof(int));
+            ecode = rec->after_call;
+            ims = original_ims;
+            break;
+            }
+          }
+        }
+
+      /* Reset the value of the ims flags, in case they got changed during
+      the group. */
+
+      ims = original_ims;
+      DPRINTF(("ims reset to %02lx\n", ims));
+
+      /* For a non-repeating ket, just continue at this level. This also
+      happens for a repeating ket if no characters were matched in the group.
+      This is the forcible breaking of infinite loops as implemented in Perl
+      5.005. If there is an options reset, it will get obeyed in the normal
+      course of events. */
+
+      if (*ecode == OP_KET || eptr == saved_eptr)
+        {
+        ecode += 1 + LINK_SIZE;
+        break;
+        }
+
+      /* The repeating kets try the rest of the pattern or restart from the
+      preceding bracket, in the appropriate order. */
+
+      if (*ecode == OP_KETRMIN)
+        {
+        RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        }
+      else  /* OP_KETRMAX */
+        {
+        RMATCH(rrc, eptr, prev, offset_top, md, ims, eptrb, match_isgroup);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        RMATCH(rrc, eptr, ecode + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0);
+        if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+        }
+      }
+
+    RRETURN(MATCH_NOMATCH);
+
+    /* Start of subject unless notbol, or after internal newline if multiline */
+
+    case OP_CIRC:
+    if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH);
+    if ((ims & PCRE_MULTILINE) != 0)
+      {
+      if (eptr != md->start_subject && eptr[-1] != NEWLINE)
+        RRETURN(MATCH_NOMATCH);
+      ecode++;
+      break;
+      }
+    /* ... else fall through */
+
+    /* Start of subject assertion */
+
+    case OP_SOD:
+    if (eptr != md->start_subject) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    /* Start of match assertion */
+
+    case OP_SOM:
+    if (eptr != md->start_subject + md->start_offset) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    /* Assert before internal newline if multiline, or before a terminating
+    newline unless endonly is set, else end of subject unless noteol is set. */
+
+    case OP_DOLL:
+    if ((ims & PCRE_MULTILINE) != 0)
+      {
+      if (eptr < md->end_subject)
+        { if (*eptr != NEWLINE) RRETURN(MATCH_NOMATCH); }
+      else
+        { if (md->noteol) RRETURN(MATCH_NOMATCH); }
+      ecode++;
+      break;
+      }
+    else
+      {
+      if (md->noteol) RRETURN(MATCH_NOMATCH);
+      if (!md->endonly)
+        {
+        if (eptr < md->end_subject - 1 ||
+           (eptr == md->end_subject - 1 && *eptr != NEWLINE))
+          RRETURN(MATCH_NOMATCH);
+        ecode++;
+        break;
+        }
+      }
+    /* ... else fall through */
+
+    /* End of subject assertion (\z) */
+
+    case OP_EOD:
+    if (eptr < md->end_subject) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    /* End of subject or ending \n assertion (\Z) */
+
+    case OP_EODN:
+    if (eptr < md->end_subject - 1 ||
+       (eptr == md->end_subject - 1 && *eptr != NEWLINE)) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    /* Word boundary assertions */
+
+    case OP_NOT_WORD_BOUNDARY:
+    case OP_WORD_BOUNDARY:
+      {
+
+      /* Find out if the previous and current characters are "word" characters.
+      It takes a bit more work in UTF-8 mode. Characters > 255 are assumed to
+      be "non-word" characters. */
+
+#ifdef SUPPORT_UTF8
+      if (md->utf8)
+        {
+        if (eptr == md->start_subject) prev_is_word = FALSE; else
+          {
+          lastptr = eptr - 1;
+          while((*lastptr & 0xc0) == 0x80) lastptr--;
+          GETCHAR(c, lastptr);
+          prev_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
+          }
+        if (eptr >= md->end_subject) cur_is_word = FALSE; else
+          {
+          GETCHAR(c, eptr);
+          cur_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
+          }
+        }
+      else
+#endif
+
+      /* More streamlined when not in UTF-8 mode */
+
+        {
+        prev_is_word = (eptr != md->start_subject) &&
+          ((md->ctypes[eptr[-1]] & ctype_word) != 0);
+        cur_is_word = (eptr < md->end_subject) &&
+          ((md->ctypes[*eptr] & ctype_word) != 0);
+        }
+
+      /* Now see if the situation is what we want */
+
+      if ((*ecode++ == OP_WORD_BOUNDARY)?
+           cur_is_word == prev_is_word : cur_is_word != prev_is_word)
+        RRETURN(MATCH_NOMATCH);
+      }
+    break;
+
+    /* Match a single character type; inline for speed */
+
+    case OP_ANY:
+    if ((ims & PCRE_DOTALL) == 0 && eptr < md->end_subject && *eptr == NEWLINE)
+      RRETURN(MATCH_NOMATCH);
+    if (eptr++ >= md->end_subject) RRETURN(MATCH_NOMATCH);
+#ifdef SUPPORT_UTF8
+    if (md->utf8)
+      while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+#endif
+    ecode++;
+    break;
+
+    /* Match a single byte, even in UTF-8 mode. This opcode really does match
+    any byte, even newline, independent of the setting of PCRE_DOTALL. */
+
+    case OP_ANYBYTE:
+    if (eptr++ >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_NOT_DIGIT:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c < 256 &&
+#endif
+       (md->ctypes[c] & ctype_digit) != 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_DIGIT:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c >= 256 ||
+#endif
+       (md->ctypes[c] & ctype_digit) == 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_NOT_WHITESPACE:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c < 256 &&
+#endif
+       (md->ctypes[c] & ctype_space) != 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_WHITESPACE:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c >= 256 ||
+#endif
+       (md->ctypes[c] & ctype_space) == 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_NOT_WORDCHAR:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c < 256 &&
+#endif
+       (md->ctypes[c] & ctype_word) != 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    case OP_WORDCHAR:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    GETCHARINCTEST(c, eptr);
+    if (
+#ifdef SUPPORT_UTF8
+       c >= 256 ||
+#endif
+       (md->ctypes[c] & ctype_word) == 0
+       )
+      RRETURN(MATCH_NOMATCH);
+    ecode++;
+    break;
+
+    /* Match a back reference, possibly repeatedly. Look past the end of the
+    item to see if there is repeat information following. The code is similar
+    to that for character classes, but repeated for efficiency. Then obey
+    similar code to character type repeats - written out again for speed.
+    However, if the referenced string is the empty string, always treat
+    it as matched, any number of times (otherwise there could be infinite
+    loops). */
+
+    case OP_REF:
+      {
+      offset = GET2(ecode, 1) << 1;               /* Doubled ref number */
+      ecode += 3;                                     /* Advance past item */
+
+      /* If the reference is unset, set the length to be longer than the amount
+      of subject left; this ensures that every attempt at a match fails. We
+      can't just fail here, because of the possibility of quantifiers with zero
+      minima. */
+
+      length = (offset >= offset_top || md->offset_vector[offset] < 0)?
+        md->end_subject - eptr + 1 :
+        md->offset_vector[offset+1] - md->offset_vector[offset];
+
+      /* Set up for repetition, or handle the non-repeated case */
+
+      switch (*ecode)
+        {
+        case OP_CRSTAR:
+        case OP_CRMINSTAR:
+        case OP_CRPLUS:
+        case OP_CRMINPLUS:
+        case OP_CRQUERY:
+        case OP_CRMINQUERY:
+        c = *ecode++ - OP_CRSTAR;
+        minimize = (c & 1) != 0;
+        min = rep_min[c];                 /* Pick up values from tables; */
+        max = rep_max[c];                 /* zero for max => infinity */
+        if (max == 0) max = INT_MAX;
+        break;
+
+        case OP_CRRANGE:
+        case OP_CRMINRANGE:
+        minimize = (*ecode == OP_CRMINRANGE);
+        min = GET2(ecode, 1);
+        max = GET2(ecode, 3);
+        if (max == 0) max = INT_MAX;
+        ecode += 5;
+        break;
+
+        default:               /* No repeat follows */
+        if (!match_ref(offset, eptr, length, md, ims)) RRETURN(MATCH_NOMATCH);
+        eptr += length;
+        continue;              /* With the main loop */
+        }
+
+      /* If the length of the reference is zero, just continue with the
+      main loop. */
+
+      if (length == 0) continue;
+
+      /* First, ensure the minimum number of matches are present. We get back
+      the length of the reference string explicitly rather than passing the
+      address of eptr, so that eptr can be a register variable. */
+
+      for (i = 1; i <= min; i++)
+        {
+        if (!match_ref(offset, eptr, length, md, ims)) RRETURN(MATCH_NOMATCH);
+        eptr += length;
+        }
+
+      /* If min = max, continue at the same level without recursion.
+      They are not both allowed to be zero. */
+
+      if (min == max) continue;
+
+      /* If minimizing, keep trying and advancing the pointer */
+
+      if (minimize)
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || !match_ref(offset, eptr, length, md, ims))
+            RRETURN(MATCH_NOMATCH);
+          eptr += length;
+          }
+        /* Control never gets here */
+        }
+
+      /* If maximizing, find the longest string and work backwards */
+
+      else
+        {
+        pp = eptr;
+        for (i = min; i < max; i++)
+          {
+          if (!match_ref(offset, eptr, length, md, ims)) break;
+          eptr += length;
+          }
+        while (eptr >= pp)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          eptr -= length;
+          }
+        RRETURN(MATCH_NOMATCH);
+        }
+      }
+    /* Control never gets here */
+
+
+
+    /* Match a bit-mapped character class, possibly repeatedly. This op code is
+    used when all the characters in the class have values in the range 0-255.
+    The only difference between OP_CLASS and OP_NCLASS occurs when a data
+    character outside the range is encountered.
+
+    First, look past the end of the item to see if there is repeat information
+    following. Then obey similar code to character type repeats - written out
+    again for speed. */
+
+    case OP_NCLASS:
+    case OP_CLASS:
+      {
+      data = ecode + 1;                /* Save for matching */
+      ecode += 33;                     /* Advance past the item */
+
+      switch (*ecode)
+        {
+        case OP_CRSTAR:
+        case OP_CRMINSTAR:
+        case OP_CRPLUS:
+        case OP_CRMINPLUS:
+        case OP_CRQUERY:
+        case OP_CRMINQUERY:
+        c = *ecode++ - OP_CRSTAR;
+        minimize = (c & 1) != 0;
+        min = rep_min[c];                 /* Pick up values from tables; */
+        max = rep_max[c];                 /* zero for max => infinity */
+        if (max == 0) max = INT_MAX;
+        break;
+
+        case OP_CRRANGE:
+        case OP_CRMINRANGE:
+        minimize = (*ecode == OP_CRMINRANGE);
+        min = GET2(ecode, 1);
+        max = GET2(ecode, 3);
+        if (max == 0) max = INT_MAX;
+        ecode += 5;
+        break;
+
+        default:               /* No repeat follows */
+        min = max = 1;
+        break;
+        }
+
+      /* First, ensure the minimum number of matches are present. */
+
+#ifdef SUPPORT_UTF8
+      /* UTF-8 mode */
+      if (md->utf8)
+        {
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+          GETCHARINC(c, eptr);
+          if (c > 255)
+            {
+            if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
+            }
+          else
+            {
+            if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
+            }
+          }
+        }
+      else
+#endif
+      /* Not UTF-8 mode */
+        {
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+          c = *eptr++;
+          if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
+          }
+        }
+
+      /* If max == min we can continue with the main loop without the
+      need to recurse. */
+
+      if (min == max) continue;
+
+      /* If minimizing, keep testing the rest of the expression and advancing
+      the pointer while it matches the class. */
+
+      if (minimize)
+        {
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+            GETCHARINC(c, eptr);
+            if (c > 255)
+              {
+              if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
+              }
+            else
+              {
+              if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
+              }
+            }
+          }
+        else
+#endif
+        /* Not UTF-8 mode */
+          {
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+            c = *eptr++;
+            if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
+            }
+          }
+        /* Control never gets here */
+        }
+
+      /* If maximizing, find the longest possible run, then work backwards. */
+
+      else
+        {
+        pp = eptr;
+
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c > 255)
+              {
+              if (op == OP_CLASS) break;
+              }
+            else
+              {
+              if ((data[c/8] & (1 << (c&7))) == 0) break;
+              }
+            eptr += len;
+            }
+          for (;;)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (eptr-- == pp) break;        /* Stop if tried at original pos */
+            BACKCHAR(eptr);
+            }
+          }
+        else
+#endif
+          /* Not UTF-8 mode */
+          {
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject) break;
+            c = *eptr;
+            if ((data[c/8] & (1 << (c&7))) == 0) break;
+            eptr++;
+            }
+          while (eptr >= pp)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            eptr--;
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            }
+          }
+
+        RRETURN(MATCH_NOMATCH);
+        }
+      }
+    /* Control never gets here */
+
+
+    /* Match an extended character class. This opcode is encountered only
+    in UTF-8 mode, because that's the only time it is compiled. */
+
+#ifdef SUPPORT_UTF8
+    case OP_XCLASS:
+      {
+      data = ecode + 1 + LINK_SIZE;                /* Save for matching */
+      ecode += GET(ecode, 1);                      /* Advance past the item */
+
+      switch (*ecode)
+        {
+        case OP_CRSTAR:
+        case OP_CRMINSTAR:
+        case OP_CRPLUS:
+        case OP_CRMINPLUS:
+        case OP_CRQUERY:
+        case OP_CRMINQUERY:
+        c = *ecode++ - OP_CRSTAR;
+        minimize = (c & 1) != 0;
+        min = rep_min[c];                 /* Pick up values from tables; */
+        max = rep_max[c];                 /* zero for max => infinity */
+        if (max == 0) max = INT_MAX;
+        break;
+
+        case OP_CRRANGE:
+        case OP_CRMINRANGE:
+        minimize = (*ecode == OP_CRMINRANGE);
+        min = GET2(ecode, 1);
+        max = GET2(ecode, 3);
+        if (max == 0) max = INT_MAX;
+        ecode += 5;
+        break;
+
+        default:               /* No repeat follows */
+        min = max = 1;
+        break;
+        }
+
+      /* First, ensure the minimum number of matches are present. */
+
+      for (i = 1; i <= min; i++)
+        {
+        if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+        GETCHARINC(c, eptr);
+        if (!match_xclass(c, data)) RRETURN(MATCH_NOMATCH);
+        }
+
+      /* If max == min we can continue with the main loop without the
+      need to recurse. */
+
+      if (min == max) continue;
+
+      /* If minimizing, keep testing the rest of the expression and advancing
+      the pointer while it matches the class. */
+
+      if (minimize)
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+          GETCHARINC(c, eptr);
+          if (!match_xclass(c, data)) RRETURN(MATCH_NOMATCH);
+          }
+        /* Control never gets here */
+        }
+
+      /* If maximizing, find the longest possible run, then work backwards. */
+
+      else
+        {
+        pp = eptr;
+        for (i = min; i < max; i++)
+          {
+          int len = 1;
+          if (eptr >= md->end_subject) break;
+          GETCHARLEN(c, eptr, len);
+          if (!match_xclass(c, data)) break;
+          eptr += len;
+          }
+        for(;;)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (eptr-- == pp) break;        /* Stop if tried at original pos */
+          BACKCHAR(eptr)
+          }
+        RRETURN(MATCH_NOMATCH);
+        }
+
+      /* Control never gets here */
+      }
+#endif    /* End of XCLASS */
+
+    /* Match a run of characters */
+
+    case OP_CHARS:
+      {
+      register int slen = ecode[1];
+      ecode += 2;
+
+#ifdef DEBUG    /* Sigh. Some compilers never learn. */
+      if (eptr >= md->end_subject)
+        printf("matching subject <null> against pattern ");
+      else
+        {
+        printf("matching subject ");
+        pchars(eptr, slen, TRUE, md);
+        printf(" against pattern ");
+        }
+      pchars(ecode, slen, FALSE, md);
+      printf("\n");
+#endif
+
+      if (slen > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
+      if ((ims & PCRE_CASELESS) != 0)
+        {
+        while (slen-- > 0)
+          if (md->lcc[*ecode++] != md->lcc[*eptr++])
+            RRETURN(MATCH_NOMATCH);
+        }
+      else
+        {
+        while (slen-- > 0) if (*ecode++ != *eptr++) RRETURN(MATCH_NOMATCH);
+        }
+      }
+    break;
+
+    /* Match a single character repeatedly; different opcodes share code. */
+
+    case OP_EXACT:
+    min = max = GET2(ecode, 1);
+    ecode += 3;
+    goto REPEATCHAR;
+
+    case OP_UPTO:
+    case OP_MINUPTO:
+    min = 0;
+    max = GET2(ecode, 1);
+    minimize = *ecode == OP_MINUPTO;
+    ecode += 3;
+    goto REPEATCHAR;
+
+    case OP_STAR:
+    case OP_MINSTAR:
+    case OP_PLUS:
+    case OP_MINPLUS:
+    case OP_QUERY:
+    case OP_MINQUERY:
+    c = *ecode++ - OP_STAR;
+    minimize = (c & 1) != 0;
+    min = rep_min[c];                 /* Pick up values from tables; */
+    max = rep_max[c];                 /* zero for max => infinity */
+    if (max == 0) max = INT_MAX;
+
+    /* Common code for all repeated single-character matches. We can give
+    up quickly if there are fewer than the minimum number of characters left in
+    the subject. */
+
+    REPEATCHAR:
+#ifdef SUPPORT_UTF8
+    if (md->utf8)
+      {
+      length = 1;
+      charptr = ecode;
+      GETCHARLEN(fc, ecode, length);
+      if (min * length > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
+      ecode += length;
+
+      /* Handle multibyte character matching specially here. There is no
+      support for any kind of casing for multibyte characters. */
+
+      if (length > 1)
+        {
+        for (i = 1; i <= min; i++)
+          {
+          if (memcmp(eptr, charptr, length) != 0) RRETURN(MATCH_NOMATCH);
+          eptr += length;
+          }
+
+        if (min == max) continue;
+
+        if (minimize)
+          {
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (fi >= max ||
+                eptr >= md->end_subject ||
+                memcmp(eptr, charptr, length) != 0)
+              RRETURN(MATCH_NOMATCH);
+            eptr += length;
+            }
+          /* Control never gets here */
+          }
+        else
+          {
+          pp = eptr;
+          for (i = min; i < max; i++)
+            {
+            if (eptr > md->end_subject - length ||
+                memcmp(eptr, charptr, length) != 0)
+              break;
+            eptr += length;
+            }
+          while (eptr >= pp)
+           {
+           RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+           if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+           eptr -= length;
+           }
+          RRETURN(MATCH_NOMATCH);
+          }
+        /* Control never gets here */
+        }
+
+      /* If the length of a UTF-8 character is 1, we fall through here, and
+      obey the code as for non-UTF-8 characters below, though in this case the
+      value of fc will always be < 128. */
+      }
+    else
+#endif
+
+    /* When not in UTF-8 mode, load a single-byte character. */
+      {
+      if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
+      fc = *ecode++;
+      }
+
+    /* The value of fc at this point is always less than 256, though we may or
+    may not be in UTF-8 mode. The code is duplicated for the caseless and
+    caseful cases, for speed, since matching characters is likely to be quite
+    common. First, ensure the minimum number of matches are present. If min =
+    max, continue at the same level without recursing. Otherwise, if
+    minimizing, keep trying the rest of the expression and advancing one
+    matching character if failing, up to the maximum. Alternatively, if
+    maximizing, find the maximum number of characters and work backwards. */
+
+    DPRINTF(("matching %c{%d,%d} against subject %.*s\n", fc, min, max,
+      max, eptr));
+
+    if ((ims & PCRE_CASELESS) != 0)
+      {
+      fc = md->lcc[fc];
+      for (i = 1; i <= min; i++)
+        if (fc != md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
+      if (min == max) continue;
+      if (minimize)
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || eptr >= md->end_subject ||
+              fc != md->lcc[*eptr++])
+            RRETURN(MATCH_NOMATCH);
+          }
+        /* Control never gets here */
+        }
+      else
+        {
+        pp = eptr;
+        for (i = min; i < max; i++)
+          {
+          if (eptr >= md->end_subject || fc != md->lcc[*eptr]) break;
+          eptr++;
+          }
+        while (eptr >= pp)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          eptr--;
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          }
+        RRETURN(MATCH_NOMATCH);
+        }
+      /* Control never gets here */
+      }
+
+    /* Caseful comparisons (includes all multi-byte characters) */
+
+    else
+      {
+      for (i = 1; i <= min; i++) if (fc != *eptr++) RRETURN(MATCH_NOMATCH);
+      if (min == max) continue;
+      if (minimize)
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || eptr >= md->end_subject || fc != *eptr++)
+            RRETURN(MATCH_NOMATCH);
+          }
+        /* Control never gets here */
+        }
+      else
+        {
+        pp = eptr;
+        for (i = min; i < max; i++)
+          {
+          if (eptr >= md->end_subject || fc != *eptr) break;
+          eptr++;
+          }
+        while (eptr >= pp)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          eptr--;
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          }
+        RRETURN(MATCH_NOMATCH);
+        }
+      }
+    /* Control never gets here */
+
+    /* Match a negated single one-byte character. The character we are
+    checking can be multibyte. */
+
+    case OP_NOT:
+    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+    ecode++;
+    GETCHARINCTEST(c, eptr);
+    if ((ims & PCRE_CASELESS) != 0)
+      {
+#ifdef SUPPORT_UTF8
+      if (c < 256)
+#endif
+      c = md->lcc[c];
+      if (md->lcc[*ecode++] == c) RRETURN(MATCH_NOMATCH);
+      }
+    else
+      {
+      if (*ecode++ == c) RRETURN(MATCH_NOMATCH);
+      }
+    break;
+
+    /* Match a negated single one-byte character repeatedly. This is almost a
+    repeat of the code for a repeated single character, but I haven't found a
+    nice way of commoning these up that doesn't require a test of the
+    positive/negative option for each character match. Maybe that wouldn't add
+    very much to the time taken, but character matching *is* what this is all
+    about... */
+
+    case OP_NOTEXACT:
+    min = max = GET2(ecode, 1);
+    ecode += 3;
+    goto REPEATNOTCHAR;
+
+    case OP_NOTUPTO:
+    case OP_NOTMINUPTO:
+    min = 0;
+    max = GET2(ecode, 1);
+    minimize = *ecode == OP_NOTMINUPTO;
+    ecode += 3;
+    goto REPEATNOTCHAR;
+
+    case OP_NOTSTAR:
+    case OP_NOTMINSTAR:
+    case OP_NOTPLUS:
+    case OP_NOTMINPLUS:
+    case OP_NOTQUERY:
+    case OP_NOTMINQUERY:
+    c = *ecode++ - OP_NOTSTAR;
+    minimize = (c & 1) != 0;
+    min = rep_min[c];                 /* Pick up values from tables; */
+    max = rep_max[c];                 /* zero for max => infinity */
+    if (max == 0) max = INT_MAX;
+
+    /* Common code for all repeated single-character (less than 255) matches.
+    We can give up quickly if there are fewer than the minimum number of
+    characters left in the subject. */
+
+    REPEATNOTCHAR:
+    if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
+    fc = *ecode++;
+
+    /* The code is duplicated for the caseless and caseful cases, for speed,
+    since matching characters is likely to be quite common. First, ensure the
+    minimum number of matches are present. If min = max, continue at the same
+    level without recursing. Otherwise, if minimizing, keep trying the rest of
+    the expression and advancing one matching character if failing, up to the
+    maximum. Alternatively, if maximizing, find the maximum number of
+    characters and work backwards. */
+
+    DPRINTF(("negative matching %c{%d,%d} against subject %.*s\n", fc, min, max,
+      max, eptr));
+
+    if ((ims & PCRE_CASELESS) != 0)
+      {
+      fc = md->lcc[fc];
+
+#ifdef SUPPORT_UTF8
+      /* UTF-8 mode */
+      if (md->utf8)
+        {
+        register int d;
+        for (i = 1; i <= min; i++)
+          {
+          GETCHARINC(d, eptr);
+          if (d < 256) d = md->lcc[d];
+          if (fc == d) RRETURN(MATCH_NOMATCH);
+          }
+        }
+      else
+#endif
+
+      /* Not UTF-8 mode */
+        {
+        for (i = 1; i <= min; i++)
+          if (fc == md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
+        }
+
+      if (min == max) continue;
+
+      if (minimize)
+        {
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          register int d;
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            GETCHARINC(d, eptr);
+            if (d < 256) d = md->lcc[d];
+            if (fi >= max || eptr >= md->end_subject || fc == d)
+              RRETURN(MATCH_NOMATCH);
+            }
+          }
+        else
+#endif
+        /* Not UTF-8 mode */
+          {
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (fi >= max || eptr >= md->end_subject || fc == md->lcc[*eptr++])
+              RRETURN(MATCH_NOMATCH);
+            }
+          }
+        /* Control never gets here */
+        }
+
+      /* Maximize case */
+
+      else
+        {
+        pp = eptr;
+
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          register int d;
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(d, eptr, len);
+            if (d < 256) d = md->lcc[d];
+            if (fc == d) break;
+            eptr += len;
+            }
+          for(;;)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (eptr-- == pp) break;        /* Stop if tried at original pos */
+            BACKCHAR(eptr);
+            }
+          }
+        else
+#endif
+        /* Not UTF-8 mode */
+          {
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || fc == md->lcc[*eptr]) break;
+            eptr++;
+            }
+          while (eptr >= pp)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            eptr--;
+            }
+          }
+
+        RRETURN(MATCH_NOMATCH);
+        }
+      /* Control never gets here */
+      }
+
+    /* Caseful comparisons */
+
+    else
+      {
+#ifdef SUPPORT_UTF8
+      /* UTF-8 mode */
+      if (md->utf8)
+        {
+        register int d;
+        for (i = 1; i <= min; i++)
+          {
+          GETCHARINC(d, eptr);
+          if (fc == d) RRETURN(MATCH_NOMATCH);
+          }
+        }
+      else
+#endif
+      /* Not UTF-8 mode */
+        {
+        for (i = 1; i <= min; i++)
+          if (fc == *eptr++) RRETURN(MATCH_NOMATCH);
+        }
+
+      if (min == max) continue;
+
+      if (minimize)
+        {
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          register int d;
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            GETCHARINC(d, eptr);
+            if (fi >= max || eptr >= md->end_subject || fc == d)
+              RRETURN(MATCH_NOMATCH);
+            }
+          }
+        else
+#endif
+        /* Not UTF-8 mode */
+          {
+          for (fi = min;; fi++)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (fi >= max || eptr >= md->end_subject || fc == *eptr++)
+              RRETURN(MATCH_NOMATCH);
+            }
+          }
+        /* Control never gets here */
+        }
+
+      /* Maximize case */
+
+      else
+        {
+        pp = eptr;
+
+#ifdef SUPPORT_UTF8
+        /* UTF-8 mode */
+        if (md->utf8)
+          {
+          register int d;
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(d, eptr, len);
+            if (fc == d) break;
+            eptr += len;
+            }
+          for(;;)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            if (eptr-- == pp) break;        /* Stop if tried at original pos */
+            BACKCHAR(eptr);
+            }
+          }
+        else
+#endif
+        /* Not UTF-8 mode */
+          {
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || fc == *eptr) break;
+            eptr++;
+            }
+          while (eptr >= pp)
+            {
+            RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+            eptr--;
+            }
+          }
+
+        RRETURN(MATCH_NOMATCH);
+        }
+      }
+    /* Control never gets here */
+
+    /* Match a single character type repeatedly; several different opcodes
+    share code. This is very similar to the code for single characters, but we
+    repeat it in the interests of efficiency. */
+
+    case OP_TYPEEXACT:
+    min = max = GET2(ecode, 1);
+    minimize = TRUE;
+    ecode += 3;
+    goto REPEATTYPE;
+
+    case OP_TYPEUPTO:
+    case OP_TYPEMINUPTO:
+    min = 0;
+    max = GET2(ecode, 1);
+    minimize = *ecode == OP_TYPEMINUPTO;
+    ecode += 3;
+    goto REPEATTYPE;
+
+    case OP_TYPESTAR:
+    case OP_TYPEMINSTAR:
+    case OP_TYPEPLUS:
+    case OP_TYPEMINPLUS:
+    case OP_TYPEQUERY:
+    case OP_TYPEMINQUERY:
+    c = *ecode++ - OP_TYPESTAR;
+    minimize = (c & 1) != 0;
+    min = rep_min[c];                 /* Pick up values from tables; */
+    max = rep_max[c];                 /* zero for max => infinity */
+    if (max == 0) max = INT_MAX;
+
+    /* Common code for all repeated single character type matches. Note that
+    in UTF-8 mode, '.' matches a character of any length, but for the other
+    character types, the valid characters are all one-byte long. */
+
+    REPEATTYPE:
+    ctype = *ecode++;      /* Code for the character type */
+
+    /* First, ensure the minimum number of matches are present. Use inline
+    code for maximizing the speed, and do the type test once at the start
+    (i.e. keep it out of the loop). Also we can test that there are at least
+    the minimum number of bytes before we start. This isn't as effective in
+    UTF-8 mode, but it does no harm. Separate the UTF-8 code completely as that
+    is tidier. */
+
+    if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
+    if (min > 0)
+      {
+#ifdef SUPPORT_UTF8
+      if (md->utf8) switch(ctype)
+        {
+        case OP_ANY:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             (*eptr++ == NEWLINE && (ims & PCRE_DOTALL) == 0))
+            RRETURN(MATCH_NOMATCH);
+          while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+          }
+        break;
+
+        case OP_ANYBYTE:
+        eptr += min;
+        break;
+
+        case OP_NOT_DIGIT:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+          GETCHARINC(c, eptr);
+          if (c < 256 && (md->ctypes[c] & ctype_digit) != 0)
+            RRETURN(MATCH_NOMATCH);
+          }
+        break;
+
+        case OP_DIGIT:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_digit) == 0)
+            RRETURN(MATCH_NOMATCH);
+          /* No need to skip more bytes - we know it's a 1-byte character */
+          }
+        break;
+
+        case OP_NOT_WHITESPACE:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             (*eptr < 128 && (md->ctypes[*eptr++] & ctype_space) != 0))
+            RRETURN(MATCH_NOMATCH);
+          while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+          }
+        break;
+
+        case OP_WHITESPACE:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_space) == 0)
+            RRETURN(MATCH_NOMATCH);
+          /* No need to skip more bytes - we know it's a 1-byte character */
+          }
+        break;
+
+        case OP_NOT_WORDCHAR:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             (*eptr < 128 && (md->ctypes[*eptr++] & ctype_word) != 0))
+            RRETURN(MATCH_NOMATCH);
+          while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+          }
+        break;
+
+        case OP_WORDCHAR:
+        for (i = 1; i <= min; i++)
+          {
+          if (eptr >= md->end_subject ||
+             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_word) == 0)
+            RRETURN(MATCH_NOMATCH);
+          /* No need to skip more bytes - we know it's a 1-byte character */
+          }
+        break;
+        }
+      else
+#endif
+
+      /* Code for the non-UTF-8 case for minimum matching */
+
+      switch(ctype)
+        {
+        case OP_ANY:
+        if ((ims & PCRE_DOTALL) == 0)
+          {
+          for (i = 1; i <= min; i++)
+            if (*eptr++ == NEWLINE) RRETURN(MATCH_NOMATCH);
+          }
+        else eptr += min;
+        break;
+
+        case OP_ANYBYTE:
+        eptr += min;
+        break;
+
+        case OP_NOT_DIGIT:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
+        break;
+
+        case OP_DIGIT:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH);
+        break;
+
+        case OP_NOT_WHITESPACE:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_space) != 0) RRETURN(MATCH_NOMATCH);
+        break;
+
+        case OP_WHITESPACE:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_space) == 0) RRETURN(MATCH_NOMATCH);
+        break;
+
+        case OP_NOT_WORDCHAR:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_word) != 0)
+            RRETURN(MATCH_NOMATCH);
+        break;
+
+        case OP_WORDCHAR:
+        for (i = 1; i <= min; i++)
+          if ((md->ctypes[*eptr++] & ctype_word) == 0)
+            RRETURN(MATCH_NOMATCH);
+        break;
+        }
+      }
+
+    /* If min = max, continue at the same level without recursing */
+
+    if (min == max) continue;
+
+    /* If minimizing, we have to test the rest of the pattern before each
+    subsequent match. Again, separate the UTF-8 case for speed. */
+
+    if (minimize)
+      {
+#ifdef SUPPORT_UTF8
+      /* UTF-8 mode */
+      if (md->utf8)
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+
+          GETCHARINC(c, eptr);
+          switch(ctype)
+            {
+            case OP_ANY:
+            if ((ims & PCRE_DOTALL) == 0 && c == NEWLINE) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_ANYBYTE:
+            break;
+
+            case OP_NOT_DIGIT:
+            if (c < 256 && (md->ctypes[c] & ctype_digit) != 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_DIGIT:
+            if (c >= 256 || (md->ctypes[c] & ctype_digit) == 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_NOT_WHITESPACE:
+            if (c < 256 && (md->ctypes[c] & ctype_space) != 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_WHITESPACE:
+            if  (c >= 256 || (md->ctypes[c] & ctype_space) == 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_NOT_WORDCHAR:
+            if (c < 256 && (md->ctypes[c] & ctype_word) != 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_WORDCHAR:
+            if (c >= 256 && (md->ctypes[c] & ctype_word) == 0)
+              RRETURN(MATCH_NOMATCH);
+            break;
+            }
+          }
+        }
+      else
+#endif
+      /* Not UTF-8 mode */
+        {
+        for (fi = min;; fi++)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
+          c = *eptr++;
+          switch(ctype)
+            {
+            case OP_ANY:
+            if ((ims & PCRE_DOTALL) == 0 && c == NEWLINE) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_ANYBYTE:
+            break;
+
+            case OP_NOT_DIGIT:
+            if ((md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_DIGIT:
+            if ((md->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_NOT_WHITESPACE:
+            if ((md->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_WHITESPACE:
+            if  ((md->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_NOT_WORDCHAR:
+            if ((md->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH);
+            break;
+
+            case OP_WORDCHAR:
+            if ((md->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH);
+            break;
+            }
+          }
+        }
+      /* Control never gets here */
+      }
+
+    /* If maximizing it is worth using inline code for speed, doing the type
+    test once at the start (i.e. keep it out of the loop). Again, keep the
+    UTF-8 stuff separate. */
+
+    else
+      {
+      pp = eptr;
+
+#ifdef SUPPORT_UTF8
+      /* UTF-8 mode */
+
+      if (md->utf8)
+        {
+        switch(ctype)
+          {
+          case OP_ANY:
+
+          /* Special code is required for UTF8, but when the maximum is unlimited
+          we don't need it, so we repeat the non-UTF8 code. This is probably
+          worth it, because .* is quite a common idiom. */
+
+          if (max < INT_MAX)
+            {
+            if ((ims & PCRE_DOTALL) == 0)
+              {
+              for (i = min; i < max; i++)
+                {
+                if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+                eptr++;
+                while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+                }
+              }
+            else
+              {
+              for (i = min; i < max; i++)
+                {
+                eptr++;
+                while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
+                }
+              }
+            }
+
+          /* Handle unlimited UTF-8 repeat */
+
+          else
+            {
+            if ((ims & PCRE_DOTALL) == 0)
+              {
+              for (i = min; i < max; i++)
+                {
+                if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+                eptr++;
+                }
+              break;
+              }
+            else
+              {
+              c = max - min;
+              if (c > md->end_subject - eptr) c = md->end_subject - eptr;
+              eptr += c;
+              }
+            }
+          break;
+
+          /* The byte case is the same as non-UTF8 */
+
+          case OP_ANYBYTE:
+          c = max - min;
+          if (c > md->end_subject - eptr) c = md->end_subject - eptr;
+          eptr += c;
+          break;
+
+          case OP_NOT_DIGIT:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c < 256 && (md->ctypes[c] & ctype_digit) != 0) break;
+            eptr+= len;
+            }
+          break;
+
+          case OP_DIGIT:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c >= 256 ||(md->ctypes[c] & ctype_digit) == 0) break;
+            eptr+= len;
+            }
+          break;
+
+          case OP_NOT_WHITESPACE:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c < 256 && (md->ctypes[c] & ctype_space) != 0) break;
+            eptr+= len;
+            }
+          break;
+
+          case OP_WHITESPACE:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c >= 256 ||(md->ctypes[c] & ctype_space) == 0) break;
+            eptr+= len;
+            }
+          break;
+
+          case OP_NOT_WORDCHAR:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c < 256 && (md->ctypes[c] & ctype_word) != 0) break;
+            eptr+= len;
+            }
+          break;
+
+          case OP_WORDCHAR:
+          for (i = min; i < max; i++)
+            {
+            int len = 1;
+            if (eptr >= md->end_subject) break;
+            GETCHARLEN(c, eptr, len);
+            if (c >= 256 || (md->ctypes[c] & ctype_word) == 0) break;
+            eptr+= len;
+            }
+          break;
+          }
+
+        /* eptr is now past the end of the maximum run */
+
+        for(;;)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          if (eptr-- == pp) break;        /* Stop if tried at original pos */
+          BACKCHAR(eptr);
+          }
+        }
+      else
+#endif
+
+      /* Not UTF-8 mode */
+        {
+        switch(ctype)
+          {
+          case OP_ANY:
+          if ((ims & PCRE_DOTALL) == 0)
+            {
+            for (i = min; i < max; i++)
+              {
+              if (eptr >= md->end_subject || *eptr == NEWLINE) break;
+              eptr++;
+              }
+            break;
+            }
+          /* For DOTALL case, fall through and treat as \C */
+
+          case OP_ANYBYTE:
+          c = max - min;
+          if (c > md->end_subject - eptr) c = md->end_subject - eptr;
+          eptr += c;
+          break;
+
+          case OP_NOT_DIGIT:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_digit) != 0)
+              break;
+            eptr++;
+            }
+          break;
+
+          case OP_DIGIT:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_digit) == 0)
+              break;
+            eptr++;
+            }
+          break;
+
+          case OP_NOT_WHITESPACE:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_space) != 0)
+              break;
+            eptr++;
+            }
+          break;
+
+          case OP_WHITESPACE:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_space) == 0)
+              break;
+            eptr++;
+            }
+          break;
+
+          case OP_NOT_WORDCHAR:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_word) != 0)
+              break;
+            eptr++;
+            }
+          break;
+
+          case OP_WORDCHAR:
+          for (i = min; i < max; i++)
+            {
+            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_word) == 0)
+              break;
+            eptr++;
+            }
+          break;
+          }
+
+        /* eptr is now past the end of the maximum run */
+
+        while (eptr >= pp)
+          {
+          RMATCH(rrc, eptr, ecode, offset_top, md, ims, eptrb, 0);
+          eptr--;
+          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
+          }
+        }
+
+      /* Get here if we can't make it match with any permitted repetitions */
+
+      RRETURN(MATCH_NOMATCH);
+      }
+    /* Control never gets here */
+
+    /* There's been some horrible disaster. Since all codes > OP_BRA are
+    for capturing brackets, and there shouldn't be any gaps between 0 and
+    OP_BRA, arrival here can only mean there is something seriously wrong
+    in the code above or the OP_xxx definitions. */
+
+    default:
+    DPRINTF(("Unknown opcode %d\n", *ecode));
+    RRETURN(PCRE_ERROR_UNKNOWN_NODE);
+    }
+
+  /* Do not stick any code in here without much thought; it is assumed
+  that "continue" in the code above comes out to here to repeat the main
+  loop. */
+
+  }             /* End of main loop */
+/* Control never reaches here */
+}
+
+
+/***************************************************************************
+****************************************************************************
+                   RECURSION IN THE match() FUNCTION
+
+Undefine all the macros that were defined above to handle this. */
+
+#ifdef NO_RECURSE
+#undef eptr
+#undef ecode
+#undef offset_top
+#undef ims
+#undef eptrb
+#undef flags
+
+#undef callpat
+#undef charptr
+#undef data
+#undef lastptr
+#undef next
+#undef pp
+#undef prev
+#undef saved_eptr
+
+#undef new_recursive
+
+#undef cur_is_word
+#undef condition
+#undef minimize
+#undef prev_is_word
+
+#undef original_ims
+
+#undef ctype
+#undef length
+#undef max
+#undef min
+#undef number
+#undef offset
+#undef op
+#undef save_capture_last
+#undef save_offset1
+#undef save_offset2
+#undef save_offset3
+#undef stacksave
+
+#undef newptrb
+
+#endif
+
+/* These two are defined as macros in both cases */
+
+#undef fc
+#undef fi
+
+/***************************************************************************
+***************************************************************************/
+
+
+
+/*************************************************
+*         Execute a Regular Expression           *
+*************************************************/
+
+/* This function applies a compiled re to a subject string and picks out
+portions of the string if it matches. Two elements in the vector are set for
+each substring: the offsets to the start and end of the substring.
+
+Arguments:
+  external_re     points to the compiled expression
+  extra_data      points to extra data or is NULL
+  subject         points to the subject string
+  length          length of subject string (may contain binary zeros)
+  start_offset    where to start in the subject string
+  options         option bits
+  offsets         points to a vector of ints to be filled in with offsets
+  offsetcount     the number of elements in the vector
+
+Returns:          > 0 => success; value is the number of elements filled in
+                  = 0 => success, but offsets is not big enough
+                   -1 => failed to match
+                 < -1 => some kind of unexpected problem
+*/
+
+EXPORT int
+pcre_exec(const pcre *external_re, const pcre_extra *extra_data,
+  const char *subject, int length, int start_offset, int options, int *offsets,
+  int offsetcount)
+{
+int rc, resetcount, ocount;
+int first_byte = -1;
+int req_byte = -1;
+int req_byte2 = -1;
+unsigned long int ims = 0;
+BOOL using_temporary_offsets = FALSE;
+BOOL anchored;
+BOOL startline;
+BOOL first_byte_caseless = FALSE;
+BOOL req_byte_caseless = FALSE;
+match_data match_block;
+const uschar *start_bits = NULL;
+const uschar *start_match = (const uschar *)subject + start_offset;
+const uschar *end_subject;
+const uschar *req_byte_ptr = start_match - 1;
+const pcre_study_data *study;
+const real_pcre *re = (const real_pcre *)external_re;
+
+/* Plausibility checks */
+
+if ((options & ~PUBLIC_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION;
+if (re == NULL || subject == NULL ||
+   (offsets == NULL && offsetcount > 0)) return PCRE_ERROR_NULL;
+
+/* Fish out the optional data from the extra_data structure, first setting
+the default values. */
+
+study = NULL;
+match_block.match_limit = MATCH_LIMIT;
+match_block.callout_data = NULL;
+
+if (extra_data != NULL)
+  {
+  register unsigned int flags = extra_data->flags;
+  if ((flags & PCRE_EXTRA_STUDY_DATA) != 0)
+    study = (const pcre_study_data *)extra_data->study_data;
+  if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0)
+    match_block.match_limit = extra_data->match_limit;
+  if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
+    match_block.callout_data = extra_data->callout_data;
+  }
+
+/* Now we have re supposedly pointing to the regex */
+
+if (re->magic_number != MAGIC_NUMBER) return PCRE_ERROR_BADMAGIC;
+
+anchored = ((re->options | options) & PCRE_ANCHORED) != 0;
+startline = (re->options & PCRE_STARTLINE) != 0;
+
+match_block.start_code =
+  (const uschar *)re + sizeof(real_pcre) + re->name_count * re->name_entry_size;
+match_block.start_subject = (const uschar *)subject;
+match_block.start_offset = start_offset;
+match_block.end_subject = match_block.start_subject + length;
+end_subject = match_block.end_subject;
+
+match_block.endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
+match_block.utf8 = (re->options & PCRE_UTF8) != 0;
+
+match_block.notbol = (options & PCRE_NOTBOL) != 0;
+match_block.noteol = (options & PCRE_NOTEOL) != 0;
+match_block.notempty = (options & PCRE_NOTEMPTY) != 0;
+
+match_block.recursive = NULL;                   /* No recursion at top level */
+
+match_block.lcc = re->tables + lcc_offset;
+match_block.ctypes = re->tables + ctypes_offset;
+
+/* Check a UTF-8 string if required. Unfortunately there's no way of passing
+back the character offset. */
+
+#ifdef SUPPORT_UTF8
+if (match_block.utf8 && (options & PCRE_NO_UTF8_CHECK) == 0)
+  {
+  if (valid_utf8((uschar *)subject, length) >= 0)
+    return PCRE_ERROR_BADUTF8;
+  if (start_offset > 0 && start_offset < length)
+    {
+    int tb = ((uschar *)subject)[start_offset];
+    if (tb > 127)
+      {
+      tb &= 0xc0;
+      if (tb != 0 && tb != 0xc0) return PCRE_ERROR_BADUTF8_OFFSET;
+      }
+    }
+  }
+#endif
+
+/* The ims options can vary during the matching as a result of the presence
+of (?ims) items in the pattern. They are kept in a local variable so that
+restoring at the exit of a group is easy. */
+
+ims = re->options & (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL);
+
+/* If the expression has got more back references than the offsets supplied can
+hold, we get a temporary bit of working store to use during the matching.
+Otherwise, we can use the vector supplied, rounding down its size to a multiple
+of 3. */
+
+ocount = offsetcount - (offsetcount % 3);
+
+if (re->top_backref > 0 && re->top_backref >= ocount/3)
+  {
+  ocount = re->top_backref * 3 + 3;
+  match_block.offset_vector = (int *)(pcre_malloc)(ocount * sizeof(int));
+  if (match_block.offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
+  using_temporary_offsets = TRUE;
+  DPRINTF(("Got memory to hold back references\n"));
+  }
+else match_block.offset_vector = offsets;
+
+match_block.offset_end = ocount;
+match_block.offset_max = (2*ocount)/3;
+match_block.offset_overflow = FALSE;
+match_block.capture_last = -1;
+
+/* Compute the minimum number of offsets that we need to reset each time. Doing
+this makes a huge difference to execution time when there aren't many brackets
+in the pattern. */
+
+resetcount = 2 + re->top_bracket * 2;
+if (resetcount > offsetcount) resetcount = ocount;
+
+/* Reset the working variable associated with each extraction. These should
+never be used unless previously set, but they get saved and restored, and so we
+initialize them to avoid reading uninitialized locations. */
+
+if (match_block.offset_vector != NULL)
+  {
+  register int *iptr = match_block.offset_vector + ocount;
+  register int *iend = iptr - resetcount/2 + 1;
+  while (--iptr >= iend) *iptr = -1;
+  }
+
+/* Set up the first character to match, if available. The first_byte value is
+never set for an anchored regular expression, but the anchoring may be forced
+at run time, so we have to test for anchoring. The first char may be unset for
+an unanchored pattern, of course. If there's no first char and the pattern was
+studied, there may be a bitmap of possible first characters. */
+
+if (!anchored)
+  {
+  if ((re->options & PCRE_FIRSTSET) != 0)
+    {
+    first_byte = re->first_byte & 255;
+    if ((first_byte_caseless = ((re->first_byte & REQ_CASELESS) != 0)) == TRUE)
+      first_byte = match_block.lcc[first_byte];
+    }
+  else
+    if (!startline && study != NULL &&
+      (study->options & PCRE_STUDY_MAPPED) != 0)
+        start_bits = study->start_bits;
+  }
+
+/* For anchored or unanchored matches, there may be a "last known required
+character" set. */
+
+if ((re->options & PCRE_REQCHSET) != 0)
+  {
+  req_byte = re->req_byte & 255;
+  req_byte_caseless = (re->req_byte & REQ_CASELESS) != 0;
+  req_byte2 = (re->tables + fcc_offset)[req_byte];  /* case flipped */
+  }
+
+/* Loop for handling unanchored repeated matching attempts; for anchored regexs
+the loop runs just once. */
+
+do
+  {
+  register int *iptr = match_block.offset_vector;
+  register int *iend = iptr + resetcount;
+
+  /* Reset the maximum number of extractions we might see. */
+
+  while (iptr < iend) *iptr++ = -1;
+
+  /* Advance to a unique first char if possible */
+
+  if (first_byte >= 0)
+    {
+    if (first_byte_caseless)
+      while (start_match < end_subject &&
+             match_block.lcc[*start_match] != first_byte)
+        start_match++;
+    else
+      while (start_match < end_subject && *start_match != first_byte)
+        start_match++;
+    }
+
+  /* Or to just after \n for a multiline match if possible */
+
+  else if (startline)
+    {
+    if (start_match > match_block.start_subject + start_offset)
+      {
+      while (start_match < end_subject && start_match[-1] != NEWLINE)
+        start_match++;
+      }
+    }
+
+  /* Or to a non-unique first char after study */
+
+  else if (start_bits != NULL)
+    {
+    while (start_match < end_subject)
+      {
+      register int c = *start_match;
+      if ((start_bits[c/8] & (1 << (c&7))) == 0) start_match++; else break;
+      }
+    }
+
+#ifdef DEBUG  /* Sigh. Some compilers never learn. */
+  printf(">>>> Match against: ");
+  pchars(start_match, end_subject - start_match, TRUE, &match_block);
+  printf("\n");
+#endif
+
+  /* If req_byte is set, we know that that character must appear in the subject
+  for the match to succeed. If the first character is set, req_byte must be
+  later in the subject; otherwise the test starts at the match point. This
+  optimization can save a huge amount of backtracking in patterns with nested
+  unlimited repeats that aren't going to match. Writing separate code for
+  cased/caseless versions makes it go faster, as does using an autoincrement
+  and backing off on a match.
+
+  HOWEVER: when the subject string is very, very long, searching to its end can
+  take a long time, and give bad performance on quite ordinary patterns. This
+  showed up when somebody was matching /^C/ on a 32-megabyte string... so we
+  don't do this when the string is sufficiently long. */
+
+  if (req_byte >= 0 && end_subject - start_match < REQ_BYTE_MAX)
+    {
+    register const uschar *p = start_match + ((first_byte >= 0)? 1 : 0);
+
+    /* We don't need to repeat the search if we haven't yet reached the
+    place we found it at last time. */
+
+    if (p > req_byte_ptr)
+      {
+      if (req_byte_caseless)
+        {
+        while (p < end_subject)
+          {
+          register int pp = *p++;
+          if (pp == req_byte || pp == req_byte2) { p--; break; }
+          }
+        }
+      else
+        {
+        while (p < end_subject)
+          {
+          if (*p++ == req_byte) { p--; break; }
+          }
+        }
+
+      /* If we can't find the required character, break the matching loop */
+
+      if (p >= end_subject) break;
+
+      /* If we have found the required character, save the point where we
+      found it, so that we don't search again next time round the loop if
+      the start hasn't passed this character yet. */
+
+      req_byte_ptr = p;
+      }
+    }
+
+  /* When a match occurs, substrings will be set for all internal extractions;
+  we just need to set up the whole thing as substring 0 before returning. If
+  there were too many extractions, set the return code to zero. In the case
+  where we had to get some local store to hold offsets for backreferences, copy
+  those back references that we can. In this case there need not be overflow
+  if certain parts of the pattern were not used. */
+
+  match_block.start_match = start_match;
+  match_block.match_call_count = 0;
+
+  rc = match(start_match, match_block.start_code, 2, &match_block, ims, NULL,
+    match_isgroup);
+
+  if (rc == MATCH_NOMATCH)
+    {
+    start_match++;
+#ifdef SUPPORT_UTF8
+    if (match_block.utf8)
+      while((*start_match & 0xc0) == 0x80) start_match++;
+#endif
+    continue;
+    }
+
+  if (rc != MATCH_MATCH)
+    {
+    DPRINTF((">>>> error: returning %d\n", rc));
+    return rc;
+    }
+
+  /* We have a match! Copy the offset information from temporary store if
+  necessary */
+
+  if (using_temporary_offsets)
+    {
+    if (offsetcount >= 4)
+      {
+      memcpy(offsets + 2, match_block.offset_vector + 2,
+        (offsetcount - 2) * sizeof(int));
+      DPRINTF(("Copied offsets from temporary memory\n"));
+      }
+    if (match_block.end_offset_top > offsetcount)
+      match_block.offset_overflow = TRUE;
+
+    DPRINTF(("Freeing temporary memory\n"));
+    (pcre_free)(match_block.offset_vector);
+    }
+
+  rc = match_block.offset_overflow? 0 : match_block.end_offset_top/2;
+
+  if (offsetcount < 2) rc = 0; else
+    {
+    offsets[0] = start_match - match_block.start_subject;
+    offsets[1] = match_block.end_match_ptr - match_block.start_subject;
+    }
+
+  DPRINTF((">>>> returning %d\n", rc));
+  return rc;
+  }
+
+/* This "while" is the end of the "do" above */
+
+while (!anchored && start_match <= end_subject);
+
+if (using_temporary_offsets)
+  {
+  DPRINTF(("Freeing temporary memory\n"));
+  (pcre_free)(match_block.offset_vector);
+  }
+
+DPRINTF((">>>> returning PCRE_ERROR_NOMATCH\n"));
+
+return PCRE_ERROR_NOMATCH;
+}
+
+/* End of pcre.c */
diff --git a/external-libs/pcre/pcre.def b/external-libs/pcre/pcre.def
new file mode 100644
index 00000000..4f6c4bff
--- /dev/null
+++ b/external-libs/pcre/pcre.def
@@ -0,0 +1,22 @@
+EXPORTS
+
+pcre_malloc DATA
+pcre_free DATA
+
+pcre_compile
+pcre_copy_substring
+pcre_exec
+pcre_get_substring
+pcre_get_substring_list
+pcre_free_substring
+pcre_free_substring_list
+pcre_info
+pcre_fullinfo
+pcre_maketables
+pcre_study
+pcre_version
+
+regcomp
+regexec
+regerror
+regfree
diff --git a/external-libs/pcre/pcre.h b/external-libs/pcre/pcre.h
new file mode 100644
index 00000000..c8a02754
--- /dev/null
+++ b/external-libs/pcre/pcre.h
@@ -0,0 +1,193 @@
+/*************************************************
+*       Perl-Compatible Regular Expressions      *
+*************************************************/
+
+/* Copyright (c) 1997-2003 University of Cambridge */
+
+#ifndef _PCRE_H
+#define _PCRE_H
+
+/* The file pcre.h is build by "configure". Do not edit it; instead
+make changes to pcre.in. */
+
+#define PCRE_MAJOR          4
+#define PCRE_MINOR          5
+#define PCRE_DATE           01-December-2003
+
+/* Win32 uses DLL by default */
+
+#ifdef _WIN32
+#  ifdef PCRE_DEFINITION
+#    ifdef DLL_EXPORT
+#      define PCRE_DATA_SCOPE __declspec(dllexport)
+#    endif
+#  else
+#    ifndef PCRE_STATIC
+#      define PCRE_DATA_SCOPE extern __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef PCRE_DATA_SCOPE
+#  define PCRE_DATA_SCOPE     extern
+#endif
+
+/* Have to include stdlib.h in order to ensure that size_t is defined;
+it is needed here for malloc. */
+
+#include <stdlib.h>
+
+/* Allow for C++ users */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Options */
+
+#define PCRE_CASELESS           0x0001
+#define PCRE_MULTILINE          0x0002
+#define PCRE_DOTALL             0x0004
+#define PCRE_EXTENDED           0x0008
+#define PCRE_ANCHORED           0x0010
+#define PCRE_DOLLAR_ENDONLY     0x0020
+#define PCRE_EXTRA              0x0040
+#define PCRE_NOTBOL             0x0080
+#define PCRE_NOTEOL             0x0100
+#define PCRE_UNGREEDY           0x0200
+#define PCRE_NOTEMPTY           0x0400
+#define PCRE_UTF8               0x0800
+#define PCRE_NO_AUTO_CAPTURE    0x1000
+#define PCRE_NO_UTF8_CHECK      0x2000
+
+/* Exec-time and get/set-time error codes */
+
+#define PCRE_ERROR_NOMATCH         (-1)
+#define PCRE_ERROR_NULL            (-2)
+#define PCRE_ERROR_BADOPTION       (-3)
+#define PCRE_ERROR_BADMAGIC        (-4)
+#define PCRE_ERROR_UNKNOWN_NODE    (-5)
+#define PCRE_ERROR_NOMEMORY        (-6)
+#define PCRE_ERROR_NOSUBSTRING     (-7)
+#define PCRE_ERROR_MATCHLIMIT      (-8)
+#define PCRE_ERROR_CALLOUT         (-9)  /* Never used by PCRE itself */
+#define PCRE_ERROR_BADUTF8        (-10)
+#define PCRE_ERROR_BADUTF8_OFFSET (-11)
+
+/* Request types for pcre_fullinfo() */
+
+#define PCRE_INFO_OPTIONS            0
+#define PCRE_INFO_SIZE               1
+#define PCRE_INFO_CAPTURECOUNT       2
+#define PCRE_INFO_BACKREFMAX         3
+#define PCRE_INFO_FIRSTBYTE          4
+#define PCRE_INFO_FIRSTCHAR          4  /* For backwards compatibility */
+#define PCRE_INFO_FIRSTTABLE         5
+#define PCRE_INFO_LASTLITERAL        6
+#define PCRE_INFO_NAMEENTRYSIZE      7
+#define PCRE_INFO_NAMECOUNT          8
+#define PCRE_INFO_NAMETABLE          9
+#define PCRE_INFO_STUDYSIZE         10
+
+/* Request types for pcre_config() */
+
+#define PCRE_CONFIG_UTF8                    0
+#define PCRE_CONFIG_NEWLINE                 1
+#define PCRE_CONFIG_LINK_SIZE               2
+#define PCRE_CONFIG_POSIX_MALLOC_THRESHOLD  3
+#define PCRE_CONFIG_MATCH_LIMIT             4
+#define PCRE_CONFIG_STACKRECURSE            5
+
+/* Bit flags for the pcre_extra structure */
+
+#define PCRE_EXTRA_STUDY_DATA          0x0001
+#define PCRE_EXTRA_MATCH_LIMIT         0x0002
+#define PCRE_EXTRA_CALLOUT_DATA        0x0004
+
+/* Types */
+
+struct real_pcre;                 /* declaration; the definition is private  */
+typedef struct real_pcre pcre;
+
+/* The structure for passing additional data to pcre_exec(). This is defined in
+such as way as to be extensible. */
+
+typedef struct pcre_extra {
+  unsigned long int flags;        /* Bits for which fields are set */
+  void *study_data;               /* Opaque data from pcre_study() */
+  unsigned long int match_limit;  /* Maximum number of calls to match() */
+  void *callout_data;             /* Data passed back in callouts */
+} pcre_extra;
+
+/* The structure for passing out data via the pcre_callout_function. We use a
+structure so that new fields can be added on the end in future versions,
+without changing the API of the function, thereby allowing old clients to work
+without modification. */
+
+typedef struct pcre_callout_block {
+  int          version;           /* Identifies version of block */
+  /* ------------------------ Version 0 ------------------------------- */
+  int          callout_number;    /* Number compiled into pattern */
+  int         *offset_vector;     /* The offset vector */
+  const char  *subject;           /* The subject being matched */
+  int          subject_length;    /* The length of the subject */
+  int          start_match;       /* Offset to start of this match attempt */
+  int          current_position;  /* Where we currently are */
+  int          capture_top;       /* Max current capture */
+  int          capture_last;      /* Most recently closed capture */
+  void        *callout_data;      /* Data passed in with the call */
+  /* ------------------------------------------------------------------ */
+} pcre_callout_block;
+
+/* Indirection for store get and free functions. These can be set to
+alternative malloc/free functions if required. Special ones are used in the
+non-recursive case for "frames". There is also an optional callout function
+that is triggered by the (?) regex item. Some magic is required for Win32 DLL;
+it is null on other OS. For Virtual Pascal, these have to be different again.
+*/
+
+#ifndef VPCOMPAT
+PCRE_DATA_SCOPE void *(*pcre_malloc)(size_t);
+PCRE_DATA_SCOPE void  (*pcre_free)(void *);
+PCRE_DATA_SCOPE void *(*pcre_stack_malloc)(size_t);
+PCRE_DATA_SCOPE void  (*pcre_stack_free)(void *);
+PCRE_DATA_SCOPE int   (*pcre_callout)(pcre_callout_block *);
+#else   /* VPCOMPAT */
+extern void *pcre_malloc(size_t);
+extern void  pcre_free(void *);
+extern void *pcre_stack_malloc(size_t);
+extern void  pcre_stack_free(void *);
+extern int   pcre_callout(pcre_callout_block *);
+#endif  /* VPCOMPAT */
+
+/* Exported PCRE functions */
+
+extern pcre *pcre_compile(const char *, int, const char **,
+              int *, const unsigned char *);
+extern int  pcre_config(int, void *);
+extern int  pcre_copy_named_substring(const pcre *, const char *,
+              int *, int, const char *, char *, int);
+extern int  pcre_copy_substring(const char *, int *, int, int,
+              char *, int);
+extern int  pcre_exec(const pcre *, const pcre_extra *,
+              const char *, int, int, int, int *, int);
+extern void pcre_free_substring(const char *);
+extern void pcre_free_substring_list(const char **);
+extern int  pcre_fullinfo(const pcre *, const pcre_extra *, int,
+              void *);
+extern int  pcre_get_named_substring(const pcre *, const char *,
+              int *, int,  const char *, const char **);
+extern int  pcre_get_stringnumber(const pcre *, const char *);
+extern int  pcre_get_substring(const char *, int *, int, int,
+              const char **);
+extern int  pcre_get_substring_list(const char *, int *, int,
+              const char ***);
+extern int  pcre_info(const pcre *, int *, int *);
+extern const unsigned char *pcre_maketables(void);
+extern pcre_extra *pcre_study(const pcre *, int, const char **);
+extern const char *pcre_version(void);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* End of pcre.h */
diff --git a/external-libs/pcre/pcre.in b/external-libs/pcre/pcre.in
new file mode 100644
index 00000000..5ad0d2ea
--- /dev/null
+++ b/external-libs/pcre/pcre.in
@@ -0,0 +1,193 @@
+/*************************************************
+*       Perl-Compatible Regular Expressions      *
+*************************************************/
+
+/* Copyright (c) 1997-2003 University of Cambridge */
+
+#ifndef _PCRE_H
+#define _PCRE_H
+
+/* The file pcre.h is build by "configure". Do not edit it; instead
+make changes to pcre.in. */
+
+#define PCRE_MAJOR          @PCRE_MAJOR@
+#define PCRE_MINOR          @PCRE_MINOR@
+#define PCRE_DATE           @PCRE_DATE@
+
+/* Win32 uses DLL by default */
+
+#ifdef _WIN32
+#  ifdef PCRE_DEFINITION
+#    ifdef DLL_EXPORT
+#      define PCRE_DATA_SCOPE __declspec(dllexport)
+#    endif
+#  else
+#    ifndef PCRE_STATIC
+#      define PCRE_DATA_SCOPE extern __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef PCRE_DATA_SCOPE
+#  define PCRE_DATA_SCOPE     extern
+#endif
+
+/* Have to include stdlib.h in order to ensure that size_t is defined;
+it is needed here for malloc. */
+
+#include <stdlib.h>
+
+/* Allow for C++ users */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Options */
+
+#define PCRE_CASELESS           0x0001
+#define PCRE_MULTILINE          0x0002
+#define PCRE_DOTALL             0x0004
+#define PCRE_EXTENDED           0x0008
+#define PCRE_ANCHORED           0x0010
+#define PCRE_DOLLAR_ENDONLY     0x0020
+#define PCRE_EXTRA              0x0040
+#define PCRE_NOTBOL             0x0080
+#define PCRE_NOTEOL             0x0100
+#define PCRE_UNGREEDY           0x0200
+#define PCRE_NOTEMPTY           0x0400
+#define PCRE_UTF8               0x0800
+#define PCRE_NO_AUTO_CAPTURE    0x1000
+#define PCRE_NO_UTF8_CHECK      0x2000
+
+/* Exec-time and get/set-time error codes */
+
+#define PCRE_ERROR_NOMATCH         (-1)
+#define PCRE_ERROR_NULL            (-2)
+#define PCRE_ERROR_BADOPTION       (-3)
+#define PCRE_ERROR_BADMAGIC        (-4)
+#define PCRE_ERROR_UNKNOWN_NODE    (-5)
+#define PCRE_ERROR_NOMEMORY        (-6)
+#define PCRE_ERROR_NOSUBSTRING     (-7)
+#define PCRE_ERROR_MATCHLIMIT      (-8)
+#define PCRE_ERROR_CALLOUT         (-9)  /* Never used by PCRE itself */
+#define PCRE_ERROR_BADUTF8        (-10)
+#define PCRE_ERROR_BADUTF8_OFFSET (-11)
+
+/* Request types for pcre_fullinfo() */
+
+#define PCRE_INFO_OPTIONS            0
+#define PCRE_INFO_SIZE               1
+#define PCRE_INFO_CAPTURECOUNT       2
+#define PCRE_INFO_BACKREFMAX         3
+#define PCRE_INFO_FIRSTBYTE          4
+#define PCRE_INFO_FIRSTCHAR          4  /* For backwards compatibility */
+#define PCRE_INFO_FIRSTTABLE         5
+#define PCRE_INFO_LASTLITERAL        6
+#define PCRE_INFO_NAMEENTRYSIZE      7
+#define PCRE_INFO_NAMECOUNT          8
+#define PCRE_INFO_NAMETABLE          9
+#define PCRE_INFO_STUDYSIZE         10
+
+/* Request types for pcre_config() */
+
+#define PCRE_CONFIG_UTF8                    0
+#define PCRE_CONFIG_NEWLINE                 1
+#define PCRE_CONFIG_LINK_SIZE               2
+#define PCRE_CONFIG_POSIX_MALLOC_THRESHOLD  3
+#define PCRE_CONFIG_MATCH_LIMIT             4
+#define PCRE_CONFIG_STACKRECURSE            5
+
+/* Bit flags for the pcre_extra structure */
+
+#define PCRE_EXTRA_STUDY_DATA          0x0001
+#define PCRE_EXTRA_MATCH_LIMIT         0x0002
+#define PCRE_EXTRA_CALLOUT_DATA        0x0004
+
+/* Types */
+
+struct real_pcre;                 /* declaration; the definition is private  */
+typedef struct real_pcre pcre;
+
+/* The structure for passing additional data to pcre_exec(). This is defined in
+such as way as to be extensible. */
+
+typedef struct pcre_extra {
+  unsigned long int flags;        /* Bits for which fields are set */
+  void *study_data;               /* Opaque data from pcre_study() */
+  unsigned long int match_limit;  /* Maximum number of calls to match() */
+  void *callout_data;             /* Data passed back in callouts */
+} pcre_extra;
+
+/* The structure for passing out data via the pcre_callout_function. We use a
+structure so that new fields can be added on the end in future versions,
+without changing the API of the function, thereby allowing old clients to work
+without modification. */
+
+typedef struct pcre_callout_block {
+  int          version;           /* Identifies version of block */
+  /* ------------------------ Version 0 ------------------------------- */
+  int          callout_number;    /* Number compiled into pattern */
+  int         *offset_vector;     /* The offset vector */
+  const char  *subject;           /* The subject being matched */
+  int          subject_length;    /* The length of the subject */
+  int          start_match;       /* Offset to start of this match attempt */
+  int          current_position;  /* Where we currently are */
+  int          capture_top;       /* Max current capture */
+  int          capture_last;      /* Most recently closed capture */
+  void        *callout_data;      /* Data passed in with the call */
+  /* ------------------------------------------------------------------ */
+} pcre_callout_block;
+
+/* Indirection for store get and free functions. These can be set to
+alternative malloc/free functions if required. Special ones are used in the
+non-recursive case for "frames". There is also an optional callout function
+that is triggered by the (?) regex item. Some magic is required for Win32 DLL;
+it is null on other OS. For Virtual Pascal, these have to be different again.
+*/
+
+#ifndef VPCOMPAT
+PCRE_DATA_SCOPE void *(*pcre_malloc)(size_t);
+PCRE_DATA_SCOPE void  (*pcre_free)(void *);
+PCRE_DATA_SCOPE void *(*pcre_stack_malloc)(size_t);
+PCRE_DATA_SCOPE void  (*pcre_stack_free)(void *);
+PCRE_DATA_SCOPE int   (*pcre_callout)(pcre_callout_block *);
+#else   /* VPCOMPAT */
+extern void *pcre_malloc(size_t);
+extern void  pcre_free(void *);
+extern void *pcre_stack_malloc(size_t);
+extern void  pcre_stack_free(void *);
+extern int   pcre_callout(pcre_callout_block *);
+#endif  /* VPCOMPAT */
+
+/* Exported PCRE functions */
+
+extern pcre *pcre_compile(const char *, int, const char **,
+              int *, const unsigned char *);
+extern int  pcre_config(int, void *);
+extern int  pcre_copy_named_substring(const pcre *, const char *,
+              int *, int, const char *, char *, int);
+extern int  pcre_copy_substring(const char *, int *, int, int,
+              char *, int);
+extern int  pcre_exec(const pcre *, const pcre_extra *,
+              const char *, int, int, int, int *, int);
+extern void pcre_free_substring(const char *);
+extern void pcre_free_substring_list(const char **);
+extern int  pcre_fullinfo(const pcre *, const pcre_extra *, int,
+              void *);
+extern int  pcre_get_named_substring(const pcre *, const char *,
+              int *, int,  const char *, const char **);
+extern int  pcre_get_stringnumber(const pcre *, const char *);
+extern int  pcre_get_substring(const char *, int *, int, int,
+              const char **);
+extern int  pcre_get_substring_list(const char *, int *, int,
+              const char ***);
+extern int  pcre_info(const pcre *, int *, int *);
+extern const unsigned char *pcre_maketables(void);
+extern pcre_extra *pcre_study(const pcre *, int, const char **);
+extern const char *pcre_version(void);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* End of pcre.h */
diff --git a/external-libs/pcre/pcredemo.c b/external-libs/pcre/pcredemo.c
new file mode 100644
index 00000000..3c827e7f
--- /dev/null
+++ b/external-libs/pcre/pcredemo.c
@@ -0,0 +1,316 @@
+/*************************************************
+*           PCRE DEMONSTRATION PROGRAM           *
+*************************************************/
+
+/* This is a demonstration program to illustrate the most straightforward ways
+of calling the PCRE regular expression library from a C program. See the
+pcresample documentation for a short discussion.
+
+Compile thuswise:
+  gcc -Wall pcredemo.c -I/opt/local/include -L/opt/local/lib \
+    -R/opt/local/lib -lpcre
+
+Replace "/opt/local/include" and "/opt/local/lib" with wherever the include and
+library files for PCRE are installed on your system. Only some operating
+systems (e.g. Solaris) use the -R option.
+*/
+
+
+#include <stdio.h>
+#include <string.h>
+#include <pcre.h>
+
+#define OVECCOUNT 30    /* should be a multiple of 3 */
+
+
+int main(int argc, char **argv)
+{
+pcre *re;
+const char *error;
+char *pattern;
+char *subject;
+unsigned char *name_table;
+int erroffset;
+int find_all;
+int namecount;
+int name_entry_size;
+int ovector[OVECCOUNT];
+int subject_length;
+int rc, i;
+
+
+/*************************************************************************
+* First, sort out the command line. There is only one possible option at *
+* the moment, "-g" to request repeated matching to find all occurrences, *
+* like Perl's /g option. We set the variable find_all non-zero if it is  *
+* present. Apart from that, there must be exactly two arguments.         *
+*************************************************************************/
+
+find_all = 0;
+for (i = 1; i < argc; i++)
+  {
+  if (strcmp(argv[i], "-g") == 0) find_all = 1;
+    else break;
+  }
+
+/* After the options, we require exactly two arguments, which are the pattern,
+and the subject string. */
+
+if (argc - i != 2)
+  {
+  printf("Two arguments required: a regex and a subject string\n");
+  return 1;
+  }
+
+pattern = argv[i];
+subject = argv[i+1];
+subject_length = (int)strlen(subject);
+
+
+/*************************************************************************
+* Now we are going to compile the regular expression pattern, and handle *
+* and errors that are detected.                                          *
+*************************************************************************/
+
+re = pcre_compile(
+  pattern,              /* the pattern */
+  0,                    /* default options */
+  &error,               /* for error message */
+  &erroffset,           /* for error offset */
+  NULL);                /* use default character tables */
+
+/* Compilation failed: print the error message and exit */
+
+if (re == NULL)
+  {
+  printf("PCRE compilation failed at offset %d: %s\n", erroffset, error);
+  return 1;
+  }
+
+
+/*************************************************************************
+* If the compilation succeeded, we call PCRE again, in order to do a     *
+* pattern match against the subject string. This just does ONE match. If *
+* further matching is needed, it will be done below.                     *
+*************************************************************************/
+
+rc = pcre_exec(
+  re,                   /* the compiled pattern */
+  NULL,                 /* no extra data - we didn't study the pattern */
+  subject,              /* the subject string */
+  subject_length,       /* the length of the subject */
+  0,                    /* start at offset 0 in the subject */
+  0,                    /* default options */
+  ovector,              /* output vector for substring information */
+  OVECCOUNT);           /* number of elements in the output vector */
+
+/* Matching failed: handle error cases */
+
+if (rc < 0)
+  {
+  switch(rc)
+    {
+    case PCRE_ERROR_NOMATCH: printf("No match\n"); break;
+    /*
+    Handle other special cases if you like
+    */
+    default: printf("Matching error %d\n", rc); break;
+    }
+  return 1;
+  }
+
+/* Match succeded */
+
+printf("\nMatch succeeded at offset %d\n", ovector[0]);
+
+
+/*************************************************************************
+* We have found the first match within the subject string. If the output *
+* vector wasn't big enough, set its size to the maximum. Then output any *
+* substrings that were captured.                                         *
+*************************************************************************/
+
+/* The output vector wasn't big enough */
+
+if (rc == 0)
+  {
+  rc = OVECCOUNT/3;
+  printf("ovector only has room for %d captured substrings\n", rc - 1);
+  }
+
+/* Show substrings stored in the output vector by number. Obviously, in a real
+application you might want to do things other than print them. */
+
+for (i = 0; i < rc; i++)
+  {
+  char *substring_start = subject + ovector[2*i];
+  int substring_length = ovector[2*i+1] - ovector[2*i];
+  printf("%2d: %.*s\n", i, substring_length, substring_start);
+  }
+
+
+/*************************************************************************
+* That concludes the basic part of this demonstration program. We have   *
+* compiled a pattern, and performed a single match. The code that follows*
+* first shows how to access named substrings, and then how to code for   *
+* repeated matches on the same subject.                                  *
+*************************************************************************/
+
+/* See if there are any named substrings, and if so, show them by name. First
+we have to extract the count of named parentheses from the pattern. */
+
+(void)pcre_fullinfo(
+  re,                   /* the compiled pattern */
+  NULL,                 /* no extra data - we didn't study the pattern */
+  PCRE_INFO_NAMECOUNT,  /* number of named substrings */
+  &namecount);          /* where to put the answer */
+
+if (namecount <= 0) printf("No named substrings\n"); else
+  {
+  unsigned char *tabptr;
+  printf("Named substrings\n");
+
+  /* Before we can access the substrings, we must extract the table for
+  translating names to numbers, and the size of each entry in the table. */
+
+  (void)pcre_fullinfo(
+    re,                       /* the compiled pattern */
+    NULL,                     /* no extra data - we didn't study the pattern */
+    PCRE_INFO_NAMETABLE,      /* address of the table */
+    &name_table);             /* where to put the answer */
+
+  (void)pcre_fullinfo(
+    re,                       /* the compiled pattern */
+    NULL,                     /* no extra data - we didn't study the pattern */
+    PCRE_INFO_NAMEENTRYSIZE,  /* size of each entry in the table */
+    &name_entry_size);        /* where to put the answer */
+
+  /* Now we can scan the table and, for each entry, print the number, the name,
+  and the substring itself. */
+
+  tabptr = name_table;
+  for (i = 0; i < namecount; i++)
+    {
+    int n = (tabptr[0] << 8) | tabptr[1];
+    printf("(%d) %*s: %.*s\n", n, name_entry_size - 3, tabptr + 2,
+      ovector[2*n+1] - ovector[2*n], subject + ovector[2*n]);
+    tabptr += name_entry_size;
+    }
+  }
+
+
+/*************************************************************************
+* If the "-g" option was given on the command line, we want to continue  *
+* to search for additional matches in the subject string, in a similar   *
+* way to the /g option in Perl. This turns out to be trickier than you   *
+* might think because of the possibility of matching an empty string.    *
+* What happens is as follows:                                            *
+*                                                                        *
+* If the previous match was NOT for an empty string, we can just start   *
+* the next match at the end of the previous one.                         *
+*                                                                        *
+* If the previous match WAS for an empty string, we can't do that, as it *
+* would lead to an infinite loop. Instead, a special call of pcre_exec() *
+* is made with the PCRE_NOTEMPTY and PCRE_ANCHORED flags set. The first  *
+* of these tells PCRE that an empty string is not a valid match; other   *
+* possibilities must be tried. The second flag restricts PCRE to one     *
+* match attempt at the initial string position. If this match succeeds,  *
+* an alternative to the empty string match has been found, and we can    *
+* proceed round the loop.                                                *
+*************************************************************************/
+
+if (!find_all) return 0;   /* Finish unless -g was given */
+
+/* Loop for second and subsequent matches */
+
+for (;;)
+  {
+  int options = 0;                 /* Normally no options */
+  int start_offset = ovector[1];   /* Start at end of previous match */
+
+  /* If the previous match was for an empty string, we are finished if we are
+  at the end of the subject. Otherwise, arrange to run another match at the
+  same point to see if a non-empty match can be found. */
+
+  if (ovector[0] == ovector[1])
+    {
+    if (ovector[0] == subject_length) break;
+    options = PCRE_NOTEMPTY | PCRE_ANCHORED;
+    }
+
+  /* Run the next matching operation */
+
+  rc = pcre_exec(
+    re,                   /* the compiled pattern */
+    NULL,                 /* no extra data - we didn't study the pattern */
+    subject,              /* the subject string */
+    subject_length,       /* the length of the subject */
+    start_offset,         /* starting offset in the subject */
+    options,              /* options */
+    ovector,              /* output vector for substring information */
+    OVECCOUNT);           /* number of elements in the output vector */
+
+  /* This time, a result of NOMATCH isn't an error. If the value in "options"
+  is zero, it just means we have found all possible matches, so the loop ends.
+  Otherwise, it means we have failed to find a non-empty-string match at a
+  point where there was a previous empty-string match. In this case, we do what
+  Perl does: advance the matching position by one, and continue. We do this by
+  setting the "end of previous match" offset, because that is picked up at the
+  top of the loop as the point at which to start again. */
+
+  if (rc == PCRE_ERROR_NOMATCH)
+    {
+    if (options == 0) break;
+    ovector[1] = start_offset + 1;
+    continue;    /* Go round the loop again */
+    }
+
+  /* Other matching errors are not recoverable. */
+
+  if (rc < 0)
+    {
+    printf("Matching error %d\n", rc);
+    return 1;
+    }
+
+  /* Match succeded */
+
+  printf("\nMatch succeeded again at offset %d\n", ovector[0]);
+
+  /* The match succeeded, but the output vector wasn't big enough. */
+
+  if (rc == 0)
+    {
+    rc = OVECCOUNT/3;
+    printf("ovector only has room for %d captured substrings\n", rc - 1);
+    }
+
+  /* As before, show substrings stored in the output vector by number, and then
+  also any named substrings. */
+
+  for (i = 0; i < rc; i++)
+    {
+    char *substring_start = subject + ovector[2*i];
+    int substring_length = ovector[2*i+1] - ovector[2*i];
+    printf("%2d: %.*s\n", i, substring_length, substring_start);
+    }
+
+  if (namecount <= 0) printf("No named substrings\n"); else
+    {
+    unsigned char *tabptr = name_table;
+    printf("Named substrings\n");
+    for (i = 0; i < namecount; i++)
+      {
+      int n = (tabptr[0] << 8) | tabptr[1];
+      printf("(%d) %*s: %.*s\n", n, name_entry_size - 3, tabptr + 2,
+        ovector[2*n+1] - ovector[2*n], subject + ovector[2*n]);
+      tabptr += name_entry_size;
+      }
+    }
+  }      /* End of loop to find second and subsequent matches */
+
+printf("\n");
+return 0;
+}
+
+/* End of pcredemo.c */
diff --git a/external-libs/pcre/pcregrep.c b/external-libs/pcre/pcregrep.c
new file mode 100644
index 00000000..7a06993d
--- /dev/null
+++ b/external-libs/pcre/pcregrep.c
@@ -0,0 +1,642 @@
+/*************************************************
+*               pcregrep program                 *
+*************************************************/
+
+/* This is a grep program that uses the PCRE regular expression library to do
+its pattern matching. On a Unix or Win32 system it can recurse into
+directories. */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "config.h"
+#include "pcre.h"
+
+#define FALSE 0
+#define TRUE 1
+
+typedef int BOOL;
+
+#define VERSION "3.0 14-Jan-2003"
+#define MAX_PATTERN_COUNT 100
+
+
+/*************************************************
+*               Global variables                 *
+*************************************************/
+
+static char *pattern_filename = NULL;
+static int  pattern_count = 0;
+static pcre **pattern_list;
+static pcre_extra **hints_list;
+
+static BOOL count_only = FALSE;
+static BOOL filenames = TRUE;
+static BOOL filenames_only = FALSE;
+static BOOL invert = FALSE;
+static BOOL number = FALSE;
+static BOOL recurse = FALSE;
+static BOOL silent = FALSE;
+static BOOL whole_lines = FALSE;
+
+/* Structure for options and list of them */
+
+typedef struct option_item {
+  int one_char;
+  const char *long_name;
+  const char *help_text;
+} option_item;
+
+static option_item optionlist[] = {
+  { -1,  "help",         "display this help and exit" },
+  { 'c', "count",        "print only a count of matching lines per FILE" },
+  { 'h', "no-filename",  "suppress the prefixing filename on output" },
+  { 'i', "ignore-case",  "ignore case distinctions" },
+  { 'l', "files-with-matches", "print only FILE names containing matches" },
+  { 'n', "line-number",  "print line number with output lines" },
+  { 'r', "recursive",    "recursively scan sub-directories" },
+  { 's', "no-messages",  "suppress error messages" },
+  { 'u', "utf-8",        "use UTF-8 mode" },
+  { 'V', "version",      "print version information and exit" },
+  { 'v', "invert-match", "select non-matching lines" },
+  { 'x', "line-regex",   "force PATTERN to match only whole lines" },
+  { 'x', "line-regexp",  "force PATTERN to match only whole lines" },
+  { 0,    NULL,           NULL }
+};
+
+
+/*************************************************
+*       Functions for directory scanning         *
+*************************************************/
+
+/* These functions are defined so that they can be made system specific,
+although at present the only ones are for Unix, Win32, and for "no directory
+recursion support". */
+
+
+/************* Directory scanning in Unix ***********/
+
+#if IS_UNIX
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+
+typedef DIR directory_type;
+
+static int
+isdirectory(char *filename)
+{
+struct stat statbuf;
+if (stat(filename, &statbuf) < 0)
+  return 0;        /* In the expectation that opening as a file will fail */
+return ((statbuf.st_mode & S_IFMT) == S_IFDIR)? '/' : 0;
+}
+
+static directory_type *
+opendirectory(char *filename)
+{
+return opendir(filename);
+}
+
+static char *
+readdirectory(directory_type *dir)
+{
+for (;;)
+  {
+  struct dirent *dent = readdir(dir);
+  if (dent == NULL) return NULL;
+  if (strcmp(dent->d_name, ".") != 0 && strcmp(dent->d_name, "..") != 0)
+    return dent->d_name;
+  }
+return NULL;   /* Keep compiler happy; never executed */
+}
+
+static void
+closedirectory(directory_type *dir)
+{
+closedir(dir);
+}
+
+
+/************* Directory scanning in Win32 ***********/
+
+/* I (Philip Hazel) have no means of testing this code. It was contributed by
+Lionel Fourquaux. */
+
+
+#elif HAVE_WIN32API
+
+#ifndef STRICT
+# define STRICT
+#endif
+#ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+
+typedef struct directory_type
+{
+HANDLE handle;
+BOOL first;
+WIN32_FIND_DATA data;
+} directory_type;
+
+int
+isdirectory(char *filename)
+{
+DWORD attr = GetFileAttributes(filename);
+if (attr == INVALID_FILE_ATTRIBUTES)
+  return 0;
+return ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) ? '/' : 0;
+}
+
+directory_type *
+opendirectory(char *filename)
+{
+size_t len;
+char *pattern;
+directory_type *dir;
+DWORD err;
+len = strlen(filename);
+pattern = (char *) malloc(len + 3);
+dir = (directory_type *) malloc(sizeof(*dir));
+if ((pattern == NULL) || (dir == NULL))
+  {
+  fprintf(stderr, "pcregrep: malloc failed\n");
+  exit(2);
+  }
+memcpy(pattern, filename, len);
+memcpy(&(pattern[len]), "\\*", 3);
+dir->handle = FindFirstFile(pattern, &(dir->data));
+if (dir->handle != INVALID_HANDLE_VALUE)
+  {
+  free(pattern);
+  dir->first = TRUE;
+  return dir;
+  }
+err = GetLastError();
+free(pattern);
+free(dir);
+errno = (err == ERROR_ACCESS_DENIED) ? EACCES : ENOENT;
+return NULL;
+}
+
+char *
+readdirectory(directory_type *dir)
+{
+for (;;)
+  {
+  if (!dir->first)
+    {
+    if (!FindNextFile(dir->handle, &(dir->data)))
+      return NULL;
+    }
+  else
+    {
+    dir->first = FALSE;
+    }
+  if (strcmp(dir->data.cFileName, ".") != 0 && strcmp(dir->data.cFileName, "..") != 0)
+    return dir->data.cFileName;
+  }
+#ifndef _MSC_VER
+return NULL;   /* Keep compiler happy; never executed */
+#endif
+}
+
+void
+closedirectory(directory_type *dir)
+{
+FindClose(dir->handle);
+free(dir);
+}
+
+
+/************* Directory scanning when we can't do it ***********/
+
+/* The type is void, and apart from isdirectory(), the functions do nothing. */
+
+#else
+
+typedef void directory_type;
+
+int isdirectory(char *filename) { return FALSE; }
+directory_type * opendirectory(char *filename) {}
+char *readdirectory(directory_type *dir) {}
+void closedirectory(directory_type *dir) {}
+
+#endif
+
+
+
+#if ! HAVE_STRERROR
+/*************************************************
+*     Provide strerror() for non-ANSI libraries  *
+*************************************************/
+
+/* Some old-fashioned systems still around (e.g. SunOS4) don't have strerror()
+in their libraries, but can provide the same facility by this simple
+alternative function. */
+
+extern int   sys_nerr;
+extern char *sys_errlist[];
+
+char *
+strerror(int n)
+{
+if (n < 0 || n >= sys_nerr) return "unknown error number";
+return sys_errlist[n];
+}
+#endif /* HAVE_STRERROR */
+
+
+
+/*************************************************
+*              Grep an individual file           *
+*************************************************/
+
+static int
+pcregrep(FILE *in, char *name)
+{
+int rc = 1;
+int linenumber = 0;
+int count = 0;
+int offsets[99];
+char buffer[BUFSIZ];
+
+while (fgets(buffer, sizeof(buffer), in) != NULL)
+  {
+  BOOL match = FALSE;
+  int i;
+  int length = (int)strlen(buffer);
+  if (length > 0 && buffer[length-1] == '\n') buffer[--length] = 0;
+  linenumber++;
+
+  for (i = 0; !match && i < pattern_count; i++)
+    {
+    match = pcre_exec(pattern_list[i], hints_list[i], buffer, length, 0, 0,
+      offsets, 99) >= 0;
+    if (match && whole_lines && offsets[1] != length) match = FALSE;
+    }
+
+  if (match != invert)
+    {
+    if (count_only) count++;
+
+    else if (filenames_only)
+      {
+      fprintf(stdout, "%s\n", (name == NULL)? "<stdin>" : name);
+      return 0;
+      }
+
+    else if (silent) return 0;
+
+    else
+      {
+      if (name != NULL) fprintf(stdout, "%s:", name);
+      if (number) fprintf(stdout, "%d:", linenumber);
+      fprintf(stdout, "%s\n", buffer);
+      }
+
+    rc = 0;
+    }
+  }
+
+if (count_only)
+  {
+  if (name != NULL) fprintf(stdout, "%s:", name);
+  fprintf(stdout, "%d\n", count);
+  }
+
+return rc;
+}
+
+
+
+
+/*************************************************
+*     Grep a file or recurse into a directory    *
+*************************************************/
+
+static int
+grep_or_recurse(char *filename, BOOL dir_recurse, BOOL show_filenames,
+  BOOL only_one_at_top)
+{
+int rc = 1;
+int sep;
+FILE *in;
+
+/* If the file is a directory and we are recursing, scan each file within it.
+The scanning code is localized so it can be made system-specific. */
+
+if ((sep = isdirectory(filename)) != 0 && dir_recurse)
+  {
+  char buffer[1024];
+  char *nextfile;
+  directory_type *dir = opendirectory(filename);
+
+  if (dir == NULL)
+    {
+    fprintf(stderr, "pcregrep: Failed to open directory %s: %s\n", filename,
+      strerror(errno));
+    return 2;
+    }
+
+  while ((nextfile = readdirectory(dir)) != NULL)
+    {
+    int frc;
+    sprintf(buffer, "%.512s%c%.128s", filename, sep, nextfile);
+    frc = grep_or_recurse(buffer, dir_recurse, TRUE, FALSE);
+    if (frc == 0 && rc == 1) rc = 0;
+    }
+
+  closedirectory(dir);
+  return rc;
+  }
+
+/* If the file is not a directory, or we are not recursing, scan it. If this is
+the first and only argument at top level, we don't show the file name (unless
+we are only showing the file name). Otherwise, control is via the
+show_filenames variable. */
+
+in = fopen(filename, "r");
+if (in == NULL)
+  {
+  fprintf(stderr, "pcregrep: Failed to open %s: %s\n", filename, strerror(errno));
+  return 2;
+  }
+
+rc = pcregrep(in, (filenames_only || (show_filenames && !only_one_at_top))?
+  filename : NULL);
+fclose(in);
+return rc;
+}
+
+
+
+
+/*************************************************
+*                Usage function                  *
+*************************************************/
+
+static int
+usage(int rc)
+{
+fprintf(stderr, "Usage: pcregrep [-Vcfhilnrsvx] [long-options] [pattern] [file1 file2 ...]\n");
+fprintf(stderr, "Type `pcregrep --help' for more information.\n");
+return rc;
+}
+
+
+
+
+/*************************************************
+*                Help function                   *
+*************************************************/
+
+static void
+help(void)
+{
+option_item *op;
+
+printf("Usage: pcregrep [OPTION]... [PATTERN] [FILE1 FILE2 ...]\n");
+printf("Search for PATTERN in each FILE or standard input.\n");
+printf("PATTERN must be present if -f is not used.\n");
+printf("Example: pcregrep -i 'hello.*world' menu.h main.c\n\n");
+
+printf("Options:\n");
+
+for (op = optionlist; op->one_char != 0; op++)
+  {
+  int n;
+  char s[4];
+  if (op->one_char > 0) sprintf(s, "-%c,", op->one_char); else strcpy(s, "   ");
+  printf("  %s --%s%n", s, op->long_name, &n);
+  n = 30 - n;
+  if (n < 1) n = 1;
+  printf("%.*s%s\n", n, "                    ", op->help_text);
+  }
+
+printf("\n  -f<filename>  or  --file=<filename>\n");
+printf("    Read patterns from <filename> instead of using a command line option.\n");
+printf("    Trailing white space is removed; blanks lines are ignored.\n");
+printf("    There is a maximum of %d patterns.\n", MAX_PATTERN_COUNT);
+
+printf("\nWith no FILE, read standard input. If fewer than two FILEs given, assume -h.\n");
+printf("Exit status is 0 if any matches, 1 if no matches, and 2 if trouble.\n");
+}
+
+
+
+
+/*************************************************
+*                Handle an option                *
+*************************************************/
+
+static int
+handle_option(int letter, int options)
+{
+switch(letter)
+  {
+  case -1:  help(); exit(0);
+  case 'c': count_only = TRUE; break;
+  case 'h': filenames = FALSE; break;
+  case 'i': options |= PCRE_CASELESS; break;
+  case 'l': filenames_only = TRUE;
+  case 'n': number = TRUE; break;
+  case 'r': recurse = TRUE; break;
+  case 's': silent = TRUE; break;
+  case 'u': options |= PCRE_UTF8; break;
+  case 'v': invert = TRUE; break;
+  case 'x': whole_lines = TRUE; options |= PCRE_ANCHORED; break;
+
+  case 'V':
+  fprintf(stderr, "pcregrep version %s using ", VERSION);
+  fprintf(stderr, "PCRE version %s\n", pcre_version());
+  exit(0);
+  break;
+
+  default:
+  fprintf(stderr, "pcregrep: Unknown option -%c\n", letter);
+  exit(usage(2));
+  }
+
+return options;
+}
+
+
+
+
+/*************************************************
+*                Main program                    *
+*************************************************/
+
+int
+main(int argc, char **argv)
+{
+int i, j;
+int rc = 1;
+int options = 0;
+int errptr;
+const char *error;
+BOOL only_one_at_top;
+
+/* Process the options */
+
+for (i = 1; i < argc; i++)
+  {
+  if (argv[i][0] != '-') break;
+
+  /* Missing options */
+
+  if (argv[i][1] == 0) exit(usage(2));
+
+  /* Long name options */
+
+  if (argv[i][1] == '-')
+    {
+    option_item *op;
+
+    if (strncmp(argv[i]+2, "file=", 5) == 0)
+      {
+      pattern_filename = argv[i] + 7;
+      continue;
+      }
+
+    for (op = optionlist; op->one_char != 0; op++)
+      {
+      if (strcmp(argv[i]+2, op->long_name) == 0)
+        {
+        options = handle_option(op->one_char, options);
+        break;
+        }
+      }
+    if (op->one_char == 0)
+      {
+      fprintf(stderr, "pcregrep: Unknown option %s\n", argv[i]);
+      exit(usage(2));
+      }
+    }
+
+  /* One-char options */
+
+  else
+    {
+    char *s = argv[i] + 1;
+    while (*s != 0)
+      {
+      if (*s == 'f')
+        {
+        pattern_filename = s + 1;
+        if (pattern_filename[0] == 0)
+          {
+          if (i >= argc - 1)
+            {
+            fprintf(stderr, "pcregrep: File name missing after -f\n");
+            exit(usage(2));
+            }
+          pattern_filename = argv[++i];
+          }
+        break;
+        }
+      else options = handle_option(*s++, options);
+      }
+    }
+  }
+
+pattern_list = (pcre **)malloc(MAX_PATTERN_COUNT * sizeof(pcre *));
+hints_list = (pcre_extra **)malloc(MAX_PATTERN_COUNT * sizeof(pcre_extra *));
+
+if (pattern_list == NULL || hints_list == NULL)
+  {
+  fprintf(stderr, "pcregrep: malloc failed\n");
+  return 2;
+  }
+
+/* Compile the regular expression(s). */
+
+if (pattern_filename != NULL)
+  {
+  FILE *f = fopen(pattern_filename, "r");
+  char buffer[BUFSIZ];
+  if (f == NULL)
+    {
+    fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pattern_filename,
+      strerror(errno));
+    return 2;
+    }
+  while (fgets(buffer, sizeof(buffer), f) != NULL)
+    {
+    char *s = buffer + (int)strlen(buffer);
+    if (pattern_count >= MAX_PATTERN_COUNT)
+      {
+      fprintf(stderr, "pcregrep: Too many patterns in file (max %d)\n",
+        MAX_PATTERN_COUNT);
+      return 2;
+      }
+    while (s > buffer && isspace((unsigned char)(s[-1]))) s--;
+    if (s == buffer) continue;
+    *s = 0;
+    pattern_list[pattern_count] = pcre_compile(buffer, options, &error,
+      &errptr, NULL);
+    if (pattern_list[pattern_count++] == NULL)
+      {
+      fprintf(stderr, "pcregrep: Error in regex number %d at offset %d: %s\n",
+        pattern_count, errptr, error);
+      return 2;
+      }
+    }
+  fclose(f);
+  }
+
+/* If no file name, a single regex must be given inline */
+
+else
+  {
+  if (i >= argc) return usage(2);
+  pattern_list[0] = pcre_compile(argv[i++], options, &error, &errptr, NULL);
+  if (pattern_list[0] == NULL)
+    {
+    fprintf(stderr, "pcregrep: Error in regex at offset %d: %s\n", errptr,
+      error);
+    return 2;
+    }
+  pattern_count++;
+  }
+
+/* Study the regular expressions, as we will be running them may times */
+
+for (j = 0; j < pattern_count; j++)
+  {
+  hints_list[j] = pcre_study(pattern_list[j], 0, &error);
+  if (error != NULL)
+    {
+    char s[16];
+    if (pattern_count == 1) s[0] = 0; else sprintf(s, " number %d", j);
+    fprintf(stderr, "pcregrep: Error while studying regex%s: %s\n", s, error);
+    return 2;
+    }
+  }
+
+/* If there are no further arguments, do the business on stdin and exit */
+
+if (i >= argc) return pcregrep(stdin, NULL);
+
+/* Otherwise, work through the remaining arguments as files or directories.
+Pass in the fact that there is only one argument at top level - this suppresses
+the file name if the argument is not a directory. */
+
+only_one_at_top = (i == argc - 1);
+if (filenames_only) filenames = TRUE;
+
+for (; i < argc; i++)
+  {
+  int frc = grep_or_recurse(argv[i], recurse, filenames, only_one_at_top);
+  if (frc == 0 && rc == 1) rc = 0;
+  }
+
+return rc;
+}
+
+/* End */
diff --git a/external-libs/pcre/pcreposix.c b/external-libs/pcre/pcreposix.c
new file mode 100644
index 00000000..856c97b4
--- /dev/null
+++ b/external-libs/pcre/pcreposix.c
@@ -0,0 +1,305 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+This module is a wrapper that provides a POSIX API to the underlying PCRE
+functions.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+#include "internal.h"
+#include "pcreposix.h"
+#include "stdlib.h"
+
+
+
+/* Corresponding tables of PCRE error messages and POSIX error codes. */
+
+static const char *const estring[] = {
+  ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,  ERR10,
+  ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, ERR20,
+  ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR29, ERR29, ERR30,
+  ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39, ERR40,
+  ERR41, ERR42, ERR43, ERR44 };
+
+static const int eint[] = {
+  REG_EESCAPE, /* "\\ at end of pattern" */
+  REG_EESCAPE, /* "\\c at end of pattern" */
+  REG_EESCAPE, /* "unrecognized character follows \\" */
+  REG_BADBR,   /* "numbers out of order in {} quantifier" */
+  REG_BADBR,   /* "number too big in {} quantifier" */
+  REG_EBRACK,  /* "missing terminating ] for character class" */
+  REG_ECTYPE,  /* "invalid escape sequence in character class" */
+  REG_ERANGE,  /* "range out of order in character class" */
+  REG_BADRPT,  /* "nothing to repeat" */
+  REG_BADRPT,  /* "operand of unlimited repeat could match the empty string" */
+  REG_ASSERT,  /* "internal error: unexpected repeat" */
+  REG_BADPAT,  /* "unrecognized character after (?" */
+  REG_BADPAT,  /* "POSIX named classes are supported only within a class" */
+  REG_EPAREN,  /* "missing )" */
+  REG_ESUBREG, /* "reference to non-existent subpattern" */
+  REG_INVARG,  /* "erroffset passed as NULL" */
+  REG_INVARG,  /* "unknown option bit(s) set" */
+  REG_EPAREN,  /* "missing ) after comment" */
+  REG_ESIZE,   /* "parentheses nested too deeply" */
+  REG_ESIZE,   /* "regular expression too large" */
+  REG_ESPACE,  /* "failed to get memory" */
+  REG_EPAREN,  /* "unmatched brackets" */
+  REG_ASSERT,  /* "internal error: code overflow" */
+  REG_BADPAT,  /* "unrecognized character after (?<" */
+  REG_BADPAT,  /* "lookbehind assertion is not fixed length" */
+  REG_BADPAT,  /* "malformed number after (?(" */
+  REG_BADPAT,  /* "conditional group containe more than two branches" */
+  REG_BADPAT,  /* "assertion expected after (?(" */
+  REG_BADPAT,  /* "(?R or (?digits must be followed by )" */
+  REG_ECTYPE,  /* "unknown POSIX class name" */
+  REG_BADPAT,  /* "POSIX collating elements are not supported" */
+  REG_INVARG,  /* "this version of PCRE is not compiled with PCRE_UTF8 support" */
+  REG_BADPAT,  /* "spare error" */
+  REG_BADPAT,  /* "character value in \x{...} sequence is too large" */
+  REG_BADPAT,  /* "invalid condition (?(0)" */
+  REG_BADPAT,  /* "\\C not allowed in lookbehind assertion" */
+  REG_EESCAPE, /* "PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X" */
+  REG_BADPAT,  /* "number after (?C is > 255" */
+  REG_BADPAT,  /* "closing ) for (?C expected" */
+  REG_BADPAT,  /* "recursive call could loop indefinitely" */
+  REG_BADPAT,  /* "unrecognized character after (?P" */
+  REG_BADPAT,  /* "syntax error after (?P" */
+  REG_BADPAT,  /* "two named groups have the same name" */
+  REG_BADPAT   /* "invalid UTF-8 string" */
+};
+
+/* Table of texts corresponding to POSIX error codes */
+
+static const char *const pstring[] = {
+  "",                                /* Dummy for value 0 */
+  "internal error",                  /* REG_ASSERT */
+  "invalid repeat counts in {}",     /* BADBR      */
+  "pattern error",                   /* BADPAT     */
+  "? * + invalid",                   /* BADRPT     */
+  "unbalanced {}",                   /* EBRACE     */
+  "unbalanced []",                   /* EBRACK     */
+  "collation error - not relevant",  /* ECOLLATE   */
+  "bad class",                       /* ECTYPE     */
+  "bad escape sequence",             /* EESCAPE    */
+  "empty expression",                /* EMPTY      */
+  "unbalanced ()",                   /* EPAREN     */
+  "bad range inside []",             /* ERANGE     */
+  "expression too big",              /* ESIZE      */
+  "failed to get memory",            /* ESPACE     */
+  "bad back reference",              /* ESUBREG    */
+  "bad argument",                    /* INVARG     */
+  "match failed"                     /* NOMATCH    */
+};
+
+
+
+
+/*************************************************
+*          Translate PCRE text code to int       *
+*************************************************/
+
+/* PCRE compile-time errors are given as strings defined as macros. We can just
+look them up in a table to turn them into POSIX-style error codes. */
+
+static int
+pcre_posix_error_code(const char *s)
+{
+size_t i;
+for (i = 0; i < sizeof(estring)/sizeof(char *); i++)
+  if (strcmp(s, estring[i]) == 0) return eint[i];
+return REG_ASSERT;
+}
+
+
+
+/*************************************************
+*          Translate error code to string        *
+*************************************************/
+
+EXPORT size_t
+regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
+{
+const char *message, *addmessage;
+size_t length, addlength;
+
+message = (errcode >= (int)(sizeof(pstring)/sizeof(char *)))?
+  "unknown error code" : pstring[errcode];
+length = strlen(message) + 1;
+
+addmessage = " at offset ";
+addlength = (preg != NULL && (int)preg->re_erroffset != -1)?
+  strlen(addmessage) + 6 : 0;
+
+if (errbuf_size > 0)
+  {
+  if (addlength > 0 && errbuf_size >= length + addlength)
+    sprintf(errbuf, "%s%s%-6d", message, addmessage, (int)preg->re_erroffset);
+  else
+    {
+    strncpy(errbuf, message, errbuf_size - 1);
+    errbuf[errbuf_size-1] = 0;
+    }
+  }
+
+return length + addlength;
+}
+
+
+
+
+/*************************************************
+*           Free store held by a regex           *
+*************************************************/
+
+EXPORT void
+regfree(regex_t *preg)
+{
+(pcre_free)(preg->re_pcre);
+}
+
+
+
+
+/*************************************************
+*            Compile a regular expression        *
+*************************************************/
+
+/*
+Arguments:
+  preg        points to a structure for recording the compiled expression
+  pattern     the pattern to compile
+  cflags      compilation flags
+
+Returns:      0 on success
+              various non-zero codes on failure
+*/
+
+EXPORT int
+regcomp(regex_t *preg, const char *pattern, int cflags)
+{
+const char *errorptr;
+int erroffset;
+int options = 0;
+
+if ((cflags & REG_ICASE) != 0) options |= PCRE_CASELESS;
+if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;
+
+preg->re_pcre = pcre_compile(pattern, options, &errorptr, &erroffset, NULL);
+preg->re_erroffset = erroffset;
+
+if (preg->re_pcre == NULL) return pcre_posix_error_code(errorptr);
+
+preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
+return 0;
+}
+
+
+
+
+/*************************************************
+*              Match a regular expression        *
+*************************************************/
+
+/* Unfortunately, PCRE requires 3 ints of working space for each captured
+substring, so we have to get and release working store instead of just using
+the POSIX structures as was done in earlier releases when PCRE needed only 2
+ints. However, if the number of possible capturing brackets is small, use a
+block of store on the stack, to reduce the use of malloc/free. The threshold is
+in a macro that can be changed at configure time. */
+
+EXPORT int
+regexec(const regex_t *preg, const char *string, size_t nmatch,
+  regmatch_t pmatch[], int eflags)
+{
+int rc;
+int options = 0;
+int *ovector = NULL;
+int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
+BOOL allocated_ovector = FALSE;
+
+if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
+if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
+
+((regex_t *)preg)->re_erroffset = (size_t)(-1);  /* Only has meaning after compile */
+
+if (nmatch > 0)
+  {
+  if (nmatch <= POSIX_MALLOC_THRESHOLD)
+    {
+    ovector = &(small_ovector[0]);
+    }
+  else
+    {
+    ovector = (int *)malloc(sizeof(int) * nmatch * 3);
+    if (ovector == NULL) return REG_ESPACE;
+    allocated_ovector = TRUE;
+    }
+  }
+
+rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),
+  0, options, ovector, nmatch * 3);
+
+if (rc == 0) rc = nmatch;    /* All captured slots were filled in */
+
+if (rc >= 0)
+  {
+  size_t i;
+  for (i = 0; i < (size_t)rc; i++)
+    {
+    pmatch[i].rm_so = ovector[i*2];
+    pmatch[i].rm_eo = ovector[i*2+1];
+    }
+  if (allocated_ovector) free(ovector);
+  for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
+  return 0;
+  }
+
+else
+  {
+  if (allocated_ovector) free(ovector);
+  switch(rc)
+    {
+    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
+    case PCRE_ERROR_NULL: return REG_INVARG;
+    case PCRE_ERROR_BADOPTION: return REG_INVARG;
+    case PCRE_ERROR_BADMAGIC: return REG_INVARG;
+    case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
+    case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
+    case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
+    case PCRE_ERROR_BADUTF8: return REG_INVARG;
+    case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
+    default: return REG_ASSERT;
+    }
+  }
+}
+
+/* End of pcreposix.c */
diff --git a/external-libs/pcre/pcreposix.h b/external-libs/pcre/pcreposix.h
new file mode 100644
index 00000000..2b97bf44
--- /dev/null
+++ b/external-libs/pcre/pcreposix.h
@@ -0,0 +1,88 @@
+/*************************************************
+*       Perl-Compatible Regular Expressions      *
+*************************************************/
+
+/* Copyright (c) 1997-2003 University of Cambridge */
+
+#ifndef _PCREPOSIX_H
+#define _PCREPOSIX_H
+
+/* This is the header for the POSIX wrapper interface to the PCRE Perl-
+Compatible Regular Expression library. It defines the things POSIX says should
+be there. I hope. */
+
+/* Have to include stdlib.h in order to ensure that size_t is defined. */
+
+#include <stdlib.h>
+
+/* Allow for C++ users */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Options defined by POSIX. */
+
+#define REG_ICASE     0x01
+#define REG_NEWLINE   0x02
+#define REG_NOTBOL    0x04
+#define REG_NOTEOL    0x08
+
+/* These are not used by PCRE, but by defining them we make it easier
+to slot PCRE into existing programs that make POSIX calls. */
+
+#define REG_EXTENDED  0
+#define REG_NOSUB     0
+
+/* Error values. Not all these are relevant or used by the wrapper. */
+
+enum {
+  REG_ASSERT = 1,  /* internal error ? */
+  REG_BADBR,       /* invalid repeat counts in {} */
+  REG_BADPAT,      /* pattern error */
+  REG_BADRPT,      /* ? * + invalid */
+  REG_EBRACE,      /* unbalanced {} */
+  REG_EBRACK,      /* unbalanced [] */
+  REG_ECOLLATE,    /* collation error - not relevant */
+  REG_ECTYPE,      /* bad class */
+  REG_EESCAPE,     /* bad escape sequence */
+  REG_EMPTY,       /* empty expression */
+  REG_EPAREN,      /* unbalanced () */
+  REG_ERANGE,      /* bad range inside [] */
+  REG_ESIZE,       /* expression too big */
+  REG_ESPACE,      /* failed to get memory */
+  REG_ESUBREG,     /* bad back reference */
+  REG_INVARG,      /* bad argument */
+  REG_NOMATCH      /* match failed */
+};
+
+
+/* The structure representing a compiled regular expression. */
+
+typedef struct {
+  void *re_pcre;
+  size_t re_nsub;
+  size_t re_erroffset;
+} regex_t;
+
+/* The structure in which a captured offset is returned. */
+
+typedef int regoff_t;
+
+typedef struct {
+  regoff_t rm_so;
+  regoff_t rm_eo;
+} regmatch_t;
+
+/* The functions */
+
+extern int regcomp(regex_t *, const char *, int);
+extern int regexec(const regex_t *, const char *, size_t, regmatch_t *, int);
+extern size_t regerror(int, const regex_t *, char *, size_t);
+extern void regfree(regex_t *);
+
+#ifdef __cplusplus
+}   /* extern "C" */
+#endif
+
+#endif /* End of pcreposix.h */
diff --git a/external-libs/pcre/pcretest.c b/external-libs/pcre/pcretest.c
new file mode 100644
index 00000000..bcc661b6
--- /dev/null
+++ b/external-libs/pcre/pcretest.c
@@ -0,0 +1,1483 @@
+/*************************************************
+*             PCRE testing program               *
+*************************************************/
+
+/* This program was hacked up as a tester for PCRE. I really should have
+written it more tidily in the first place. Will I ever learn? It has grown and
+been extended and consequently is now rather untidy in places. */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <locale.h>
+
+/* We need the internal info for displaying the results of pcre_study(). Also
+for getting the opcodes for showing compiled code. */
+
+#define PCRE_SPY        /* For Win32 build, import data, not export */
+#include "internal.h"
+
+/* It is possible to compile this test program without including support for
+testing the POSIX interface, though this is not available via the standard
+Makefile. */
+
+#if !defined NOPOSIX
+#include "pcreposix.h"
+#endif
+
+#ifndef CLOCKS_PER_SEC
+#ifdef CLK_TCK
+#define CLOCKS_PER_SEC CLK_TCK
+#else
+#define CLOCKS_PER_SEC 100
+#endif
+#endif
+
+#define LOOPREPEAT 50000
+
+#define BUFFER_SIZE 30000
+#define DBUFFER_SIZE BUFFER_SIZE
+
+
+static FILE *outfile;
+static int log_store = 0;
+static int callout_count;
+static int callout_extra;
+static int callout_fail_count;
+static int callout_fail_id;
+static int first_callout;
+static int show_malloc;
+static int use_utf8;
+static size_t gotten_store;
+
+
+static const int utf8_table1[] = {
+  0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff};
+
+static const int utf8_table2[] = {
+  0, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc};
+
+static const int utf8_table3[] = {
+  0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};
+
+
+
+/*************************************************
+*         Print compiled regex                   *
+*************************************************/
+
+/* The code for doing this is held in a separate file that is also included in
+pcre.c when it is compiled with the debug switch. It defines a function called
+print_internals(), which uses a table of opcode lengths defined by the macro
+OP_LENGTHS, whose name must be OP_lengths. */
+
+static uschar OP_lengths[] = { OP_LENGTHS };
+
+#include "printint.c"
+
+
+
+/*************************************************
+*          Read number from string               *
+*************************************************/
+
+/* We don't use strtoul() because SunOS4 doesn't have it. Rather than mess
+around with conditional compilation, just do the job by hand. It is only used
+for unpicking the -o argument, so just keep it simple.
+
+Arguments:
+  str           string to be converted
+  endptr        where to put the end pointer
+
+Returns:        the unsigned long
+*/
+
+static int
+get_value(unsigned char *str, unsigned char **endptr)
+{
+int result = 0;
+while(*str != 0 && isspace(*str)) str++;
+while (isdigit(*str)) result = result * 10 + (int)(*str++ - '0');
+*endptr = str;
+return(result);
+}
+
+
+
+/*************************************************
+*       Convert character value to UTF-8         *
+*************************************************/
+
+/* This function takes an integer value in the range 0 - 0x7fffffff
+and encodes it as a UTF-8 character in 0 to 6 bytes.
+
+Arguments:
+  cvalue     the character value
+  buffer     pointer to buffer for result - at least 6 bytes long
+
+Returns:     number of characters placed in the buffer
+             -1 if input character is negative
+             0 if input character is positive but too big (only when
+             int is longer than 32 bits)
+*/
+
+static int
+ord2utf8(int cvalue, unsigned char *buffer)
+{
+register int i, j;
+for (i = 0; i < sizeof(utf8_table1)/sizeof(int); i++)
+  if (cvalue <= utf8_table1[i]) break;
+if (i >= sizeof(utf8_table1)/sizeof(int)) return 0;
+if (cvalue < 0) return -1;
+
+buffer += i;
+for (j = i; j > 0; j--)
+ {
+ *buffer-- = 0x80 | (cvalue & 0x3f);
+ cvalue >>= 6;
+ }
+*buffer = utf8_table2[i] | cvalue;
+return i + 1;
+}
+
+
+/*************************************************
+*            Convert UTF-8 string to value       *
+*************************************************/
+
+/* This function takes one or more bytes that represents a UTF-8 character,
+and returns the value of the character.
+
+Argument:
+  buffer   a pointer to the byte vector
+  vptr     a pointer to an int to receive the value
+
+Returns:   >  0 => the number of bytes consumed
+           -6 to 0 => malformed UTF-8 character at offset = (-return)
+*/
+
+static int
+utf82ord(unsigned char *buffer, int *vptr)
+{
+int c = *buffer++;
+int d = c;
+int i, j, s;
+
+for (i = -1; i < 6; i++)               /* i is number of additional bytes */
+  {
+  if ((d & 0x80) == 0) break;
+  d <<= 1;
+  }
+
+if (i == -1) { *vptr = c; return 1; }  /* ascii character */
+if (i == 0 || i == 6) return 0;        /* invalid UTF-8 */
+
+/* i now has a value in the range 1-5 */
+
+s = 6*i;
+d = (c & utf8_table3[i]) << s;
+
+for (j = 0; j < i; j++)
+  {
+  c = *buffer++;
+  if ((c & 0xc0) != 0x80) return -(j+1);
+  s -= 6;
+  d |= (c & 0x3f) << s;
+  }
+
+/* Check that encoding was the correct unique one */
+
+for (j = 0; j < sizeof(utf8_table1)/sizeof(int); j++)
+  if (d <= utf8_table1[j]) break;
+if (j != i) return -(i+1);
+
+/* Valid value */
+
+*vptr = d;
+return i+1;
+}
+
+
+
+/*************************************************
+*             Print character string             *
+*************************************************/
+
+/* Character string printing function. Must handle UTF-8 strings in utf8
+mode. Yields number of characters printed. If handed a NULL file, just counts
+chars without printing. */
+
+static int pchars(unsigned char *p, int length, FILE *f)
+{
+int c;
+int yield = 0;
+
+while (length-- > 0)
+  {
+  if (use_utf8)
+    {
+    int rc = utf82ord(p, &c);
+
+    if (rc > 0 && rc <= length + 1)   /* Mustn't run over the end */
+      {
+      length -= rc - 1;
+      p += rc;
+      if (c < 256 && isprint(c))
+        {
+        if (f != NULL) fprintf(f, "%c", c);
+        yield++;
+        }
+      else
+        {
+        int n;
+        if (f != NULL) fprintf(f, "\\x{%02x}%n", c, &n);
+        yield += n;
+        }
+      continue;
+      }
+    }
+
+   /* Not UTF-8, or malformed UTF-8  */
+
+  if (isprint(c = *(p++)))
+    {
+    if (f != NULL) fprintf(f, "%c", c);
+    yield++;
+    }
+  else
+    {
+    if (f != NULL) fprintf(f, "\\x%02x", c);
+    yield += 4;
+    }
+  }
+
+return yield;
+}
+
+
+
+/*************************************************
+*              Callout function                  *
+*************************************************/
+
+/* Called from PCRE as a result of the (?C) item. We print out where we are in
+the match. Yield zero unless more callouts than the fail count, or the callout
+data is not zero. */
+
+static int callout(pcre_callout_block *cb)
+{
+FILE *f = (first_callout | callout_extra)? outfile : NULL;
+int i, pre_start, post_start;
+
+if (callout_extra)
+  {
+  fprintf(f, "Callout %d: last capture = %d\n",
+    cb->callout_number, cb->capture_last);
+
+  for (i = 0; i < cb->capture_top * 2; i += 2)
+    {
+    if (cb->offset_vector[i] < 0)
+      fprintf(f, "%2d: <unset>\n", i/2);
+    else
+      {
+      fprintf(f, "%2d: ", i/2);
+      (void)pchars((unsigned char *)cb->subject + cb->offset_vector[i],
+        cb->offset_vector[i+1] - cb->offset_vector[i], f);
+      fprintf(f, "\n");
+      }
+    }
+  }
+
+/* Re-print the subject in canonical form, the first time or if giving full
+datails. On subsequent calls in the same match, we use pchars just to find the
+printed lengths of the substrings. */
+
+if (f != NULL) fprintf(f, "--->");
+
+pre_start = pchars((unsigned char *)cb->subject, cb->start_match, f);
+post_start = pchars((unsigned char *)(cb->subject + cb->start_match),
+  cb->current_position - cb->start_match, f);
+
+(void)pchars((unsigned char *)(cb->subject + cb->current_position),
+  cb->subject_length - cb->current_position, f);
+
+if (f != NULL) fprintf(f, "\n");
+
+/* Always print appropriate indicators, with callout number if not already
+shown */
+
+if (callout_extra) fprintf(outfile, "    ");
+  else fprintf(outfile, "%3d ", cb->callout_number);
+
+for (i = 0; i < pre_start; i++) fprintf(outfile, " ");
+fprintf(outfile, "^");
+
+if (post_start > 0)
+  {
+  for (i = 0; i < post_start - 1; i++) fprintf(outfile, " ");
+  fprintf(outfile, "^");
+  }
+
+fprintf(outfile, "\n");
+first_callout = 0;
+
+if (cb->callout_data != NULL)
+  {
+  int callout_data = *((int *)(cb->callout_data));
+  if (callout_data != 0)
+    {
+    fprintf(outfile, "Callout data = %d\n", callout_data);
+    return callout_data;
+    }
+  }
+
+return (cb->callout_number != callout_fail_id)? 0 :
+       (++callout_count >= callout_fail_count)? 1 : 0;
+}
+
+
+/*************************************************
+*            Local malloc functions              *
+*************************************************/
+
+/* Alternative malloc function, to test functionality and show the size of the
+compiled re. */
+
+static void *new_malloc(size_t size)
+{
+void *block = malloc(size);
+gotten_store = size;
+if (show_malloc)
+  fprintf(outfile, "malloc       %3d %p\n", size, block);
+return block;
+}
+
+static void new_free(void *block)
+{
+if (show_malloc)
+  fprintf(outfile, "free             %p\n", block);
+free(block);
+}
+
+
+/* For recursion malloc/free, to test stacking calls */
+
+static void *stack_malloc(size_t size)
+{
+void *block = malloc(size);
+if (show_malloc)
+  fprintf(outfile, "stack_malloc %3d %p\n", size, block);
+return block;
+}
+
+static void stack_free(void *block)
+{
+if (show_malloc)
+  fprintf(outfile, "stack_free       %p\n", block);
+free(block);
+}
+
+
+/*************************************************
+*          Call pcre_fullinfo()                  *
+*************************************************/
+
+/* Get one piece of information from the pcre_fullinfo() function */
+
+static void new_info(pcre *re, pcre_extra *study, int option, void *ptr)
+{
+int rc;
+if ((rc = pcre_fullinfo(re, study, option, ptr)) < 0)
+  fprintf(outfile, "Error %d from pcre_fullinfo(%d)\n", rc, option);
+}
+
+
+
+/*************************************************
+*                Main Program                    *
+*************************************************/
+
+/* Read lines from named file or stdin and write to named file or stdout; lines
+consist of a regular expression, in delimiters and optionally followed by
+options, followed by a set of test data, terminated by an empty line. */
+
+int main(int argc, char **argv)
+{
+FILE *infile = stdin;
+int options = 0;
+int study_options = 0;
+int op = 1;
+int timeit = 0;
+int showinfo = 0;
+int showstore = 0;
+int size_offsets = 45;
+int size_offsets_max;
+int *offsets;
+#if !defined NOPOSIX
+int posix = 0;
+#endif
+int debug = 0;
+int done = 0;
+
+unsigned char *buffer;
+unsigned char *dbuffer;
+
+/* Get buffers from malloc() so that Electric Fence will check their misuse
+when I am debugging. */
+
+buffer = (unsigned char *)malloc(BUFFER_SIZE);
+dbuffer = (unsigned char *)malloc(DBUFFER_SIZE);
+
+/* Static so that new_malloc can use it. */
+
+outfile = stdout;
+
+/* Scan options */
+
+while (argc > 1 && argv[op][0] == '-')
+  {
+  unsigned char *endptr;
+
+  if (strcmp(argv[op], "-s") == 0 || strcmp(argv[op], "-m") == 0)
+    showstore = 1;
+  else if (strcmp(argv[op], "-t") == 0) timeit = 1;
+  else if (strcmp(argv[op], "-i") == 0) showinfo = 1;
+  else if (strcmp(argv[op], "-d") == 0) showinfo = debug = 1;
+  else if (strcmp(argv[op], "-o") == 0 && argc > 2 &&
+      ((size_offsets = get_value((unsigned char *)argv[op+1], &endptr)),
+        *endptr == 0))
+    {
+    op++;
+    argc--;
+    }
+#if !defined NOPOSIX
+  else if (strcmp(argv[op], "-p") == 0) posix = 1;
+#endif
+  else if (strcmp(argv[op], "-C") == 0)
+    {
+    int rc;
+    printf("PCRE version %s\n", pcre_version());
+    printf("Compiled with\n");
+    (void)pcre_config(PCRE_CONFIG_UTF8, &rc);
+    printf("  %sUTF-8 support\n", rc? "" : "No ");
+    (void)pcre_config(PCRE_CONFIG_NEWLINE, &rc);
+    printf("  Newline character is %s\n", (rc == '\r')? "CR" : "LF");
+    (void)pcre_config(PCRE_CONFIG_LINK_SIZE, &rc);
+    printf("  Internal link size = %d\n", rc);
+    (void)pcre_config(PCRE_CONFIG_POSIX_MALLOC_THRESHOLD, &rc);
+    printf("  POSIX malloc threshold = %d\n", rc);
+    (void)pcre_config(PCRE_CONFIG_MATCH_LIMIT, &rc);
+    printf("  Default match limit = %d\n", rc);
+    (void)pcre_config(PCRE_CONFIG_STACKRECURSE, &rc);
+    printf("  Match recursion uses %s\n", rc? "stack" : "heap");
+    exit(0);
+    }
+  else
+    {
+    printf("** Unknown or malformed option %s\n", argv[op]);
+    printf("Usage:   pcretest [-d] [-i] [-o <n>] [-p] [-s] [-t] [<input> [<output>]]\n");
+    printf("  -C     show PCRE compile-time options and exit\n");
+    printf("  -d     debug: show compiled code; implies -i\n"
+           "  -i     show information about compiled pattern\n"
+           "  -o <n> set size of offsets vector to <n>\n");
+#if !defined NOPOSIX
+    printf("  -p     use POSIX interface\n");
+#endif
+    printf("  -s     output store information\n"
+           "  -t     time compilation and execution\n");
+    return 1;
+    }
+  op++;
+  argc--;
+  }
+
+/* Get the store for the offsets vector, and remember what it was */
+
+size_offsets_max = size_offsets;
+offsets = (int *)malloc(size_offsets_max * sizeof(int));
+if (offsets == NULL)
+  {
+  printf("** Failed to get %d bytes of memory for offsets vector\n",
+    size_offsets_max * sizeof(int));
+  return 1;
+  }
+
+/* Sort out the input and output files */
+
+if (argc > 1)
+  {
+  infile = fopen(argv[op], "r");
+  if (infile == NULL)
+    {
+    printf("** Failed to open %s\n", argv[op]);
+    return 1;
+    }
+  }
+
+if (argc > 2)
+  {
+  outfile = fopen(argv[op+1], "w");
+  if (outfile == NULL)
+    {
+    printf("** Failed to open %s\n", argv[op+1]);
+    return 1;
+    }
+  }
+
+/* Set alternative malloc function */
+
+pcre_malloc = new_malloc;
+pcre_free = new_free;
+pcre_stack_malloc = stack_malloc;
+pcre_stack_free = stack_free;
+
+/* Heading line, then prompt for first regex if stdin */
+
+fprintf(outfile, "PCRE version %s\n\n", pcre_version());
+
+/* Main loop */
+
+while (!done)
+  {
+  pcre *re = NULL;
+  pcre_extra *extra = NULL;
+
+#if !defined NOPOSIX  /* There are still compilers that require no indent */
+  regex_t preg;
+  int do_posix = 0;
+#endif
+
+  const char *error;
+  unsigned char *p, *pp, *ppp;
+  const unsigned char *tables = NULL;
+  int do_study = 0;
+  int do_debug = debug;
+  int do_G = 0;
+  int do_g = 0;
+  int do_showinfo = showinfo;
+  int do_showrest = 0;
+  int erroroffset, len, delimiter;
+
+  use_utf8 = 0;
+
+  if (infile == stdin) printf("  re> ");
+  if (fgets((char *)buffer, BUFFER_SIZE, infile) == NULL) break;
+  if (infile != stdin) fprintf(outfile, "%s", (char *)buffer);
+  fflush(outfile);
+
+  p = buffer;
+  while (isspace(*p)) p++;
+  if (*p == 0) continue;
+
+  /* Get the delimiter and seek the end of the pattern; if is isn't
+  complete, read more. */
+
+  delimiter = *p++;
+
+  if (isalnum(delimiter) || delimiter == '\\')
+    {
+    fprintf(outfile, "** Delimiter must not be alphameric or \\\n");
+    goto SKIP_DATA;
+    }
+
+  pp = p;
+
+  for(;;)
+    {
+    while (*pp != 0)
+      {
+      if (*pp == '\\' && pp[1] != 0) pp++;
+        else if (*pp == delimiter) break;
+      pp++;
+      }
+    if (*pp != 0) break;
+
+    len = BUFFER_SIZE - (pp - buffer);
+    if (len < 256)
+      {
+      fprintf(outfile, "** Expression too long - missing delimiter?\n");
+      goto SKIP_DATA;
+      }
+
+    if (infile == stdin) printf("    > ");
+    if (fgets((char *)pp, len, infile) == NULL)
+      {
+      fprintf(outfile, "** Unexpected EOF\n");
+      done = 1;
+      goto CONTINUE;
+      }
+    if (infile != stdin) fprintf(outfile, "%s", (char *)pp);
+    }
+
+  /* If the first character after the delimiter is backslash, make
+  the pattern end with backslash. This is purely to provide a way
+  of testing for the error message when a pattern ends with backslash. */
+
+  if (pp[1] == '\\') *pp++ = '\\';
+
+  /* Terminate the pattern at the delimiter */
+
+  *pp++ = 0;
+
+  /* Look for options after final delimiter */
+
+  options = 0;
+  study_options = 0;
+  log_store = showstore;  /* default from command line */
+
+  while (*pp != 0)
+    {
+    switch (*pp++)
+      {
+      case 'g': do_g = 1; break;
+      case 'i': options |= PCRE_CASELESS; break;
+      case 'm': options |= PCRE_MULTILINE; break;
+      case 's': options |= PCRE_DOTALL; break;
+      case 'x': options |= PCRE_EXTENDED; break;
+
+      case '+': do_showrest = 1; break;
+      case 'A': options |= PCRE_ANCHORED; break;
+      case 'D': do_debug = do_showinfo = 1; break;
+      case 'E': options |= PCRE_DOLLAR_ENDONLY; break;
+      case 'G': do_G = 1; break;
+      case 'I': do_showinfo = 1; break;
+      case 'M': log_store = 1; break;
+      case 'N': options |= PCRE_NO_AUTO_CAPTURE; break;
+
+#if !defined NOPOSIX
+      case 'P': do_posix = 1; break;
+#endif
+
+      case 'S': do_study = 1; break;
+      case 'U': options |= PCRE_UNGREEDY; break;
+      case 'X': options |= PCRE_EXTRA; break;
+      case '8': options |= PCRE_UTF8; use_utf8 = 1; break;
+      case '?': options |= PCRE_NO_UTF8_CHECK; break;
+
+      case 'L':
+      ppp = pp;
+      while (*ppp != '\n' && *ppp != ' ') ppp++;
+      *ppp = 0;
+      if (setlocale(LC_CTYPE, (const char *)pp) == NULL)
+        {
+        fprintf(outfile, "** Failed to set locale \"%s\"\n", pp);
+        goto SKIP_DATA;
+        }
+      tables = pcre_maketables();
+      pp = ppp;
+      break;
+
+      case '\n': case ' ': break;
+      default:
+      fprintf(outfile, "** Unknown option '%c'\n", pp[-1]);
+      goto SKIP_DATA;
+      }
+    }
+
+  /* Handle compiling via the POSIX interface, which doesn't support the
+  timing, showing, or debugging options, nor the ability to pass over
+  local character tables. */
+
+#if !defined NOPOSIX
+  if (posix || do_posix)
+    {
+    int rc;
+    int cflags = 0;
+    if ((options & PCRE_CASELESS) != 0) cflags |= REG_ICASE;
+    if ((options & PCRE_MULTILINE) != 0) cflags |= REG_NEWLINE;
+    rc = regcomp(&preg, (char *)p, cflags);
+
+    /* Compilation failed; go back for another re, skipping to blank line
+    if non-interactive. */
+
+    if (rc != 0)
+      {
+      (void)regerror(rc, &preg, (char *)buffer, BUFFER_SIZE);
+      fprintf(outfile, "Failed: POSIX code %d: %s\n", rc, buffer);
+      goto SKIP_DATA;
+      }
+    }
+
+  /* Handle compiling via the native interface */
+
+  else
+#endif  /* !defined NOPOSIX */
+
+    {
+    if (timeit)
+      {
+      register int i;
+      clock_t time_taken;
+      clock_t start_time = clock();
+      for (i = 0; i < LOOPREPEAT; i++)
+        {
+        re = pcre_compile((char *)p, options, &error, &erroroffset, tables);
+        if (re != NULL) free(re);
+        }
+      time_taken = clock() - start_time;
+      fprintf(outfile, "Compile time %.3f milliseconds\n",
+        (((double)time_taken * 1000.0) / (double)LOOPREPEAT) /
+          (double)CLOCKS_PER_SEC);
+      }
+
+    re = pcre_compile((char *)p, options, &error, &erroroffset, tables);
+
+    /* Compilation failed; go back for another re, skipping to blank line
+    if non-interactive. */
+
+    if (re == NULL)
+      {
+      fprintf(outfile, "Failed: %s at offset %d\n", error, erroroffset);
+      SKIP_DATA:
+      if (infile != stdin)
+        {
+        for (;;)
+          {
+          if (fgets((char *)buffer, BUFFER_SIZE, infile) == NULL)
+            {
+            done = 1;
+            goto CONTINUE;
+            }
+          len = (int)strlen((char *)buffer);
+          while (len > 0 && isspace(buffer[len-1])) len--;
+          if (len == 0) break;
+          }
+        fprintf(outfile, "\n");
+        }
+      goto CONTINUE;
+      }
+
+    /* Compilation succeeded; print data if required. There are now two
+    info-returning functions. The old one has a limited interface and
+    returns only limited data. Check that it agrees with the newer one. */
+
+    if (log_store)
+      fprintf(outfile, "Memory allocation (code space): %d\n",
+        (int)(gotten_store -
+              sizeof(real_pcre) -
+              ((real_pcre *)re)->name_count * ((real_pcre *)re)->name_entry_size));
+
+    if (do_showinfo)
+      {
+      unsigned long int get_options;
+      int old_first_char, old_options, old_count;
+      int count, backrefmax, first_char, need_char;
+      int nameentrysize, namecount;
+      const uschar *nametable;
+      size_t size;
+
+      if (do_debug)
+        {
+        fprintf(outfile, "------------------------------------------------------------------\n");
+        print_internals(re, outfile);
+        }
+
+      new_info(re, NULL, PCRE_INFO_OPTIONS, &get_options);
+      new_info(re, NULL, PCRE_INFO_SIZE, &size);
+      new_info(re, NULL, PCRE_INFO_CAPTURECOUNT, &count);
+      new_info(re, NULL, PCRE_INFO_BACKREFMAX, &backrefmax);
+      new_info(re, NULL, PCRE_INFO_FIRSTBYTE, &first_char);
+      new_info(re, NULL, PCRE_INFO_LASTLITERAL, &need_char);
+      new_info(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &nameentrysize);
+      new_info(re, NULL, PCRE_INFO_NAMECOUNT, &namecount);
+      new_info(re, NULL, PCRE_INFO_NAMETABLE, (void *)&nametable);
+
+      old_count = pcre_info(re, &old_options, &old_first_char);
+      if (count < 0) fprintf(outfile,
+        "Error %d from pcre_info()\n", count);
+      else
+        {
+        if (old_count != count) fprintf(outfile,
+          "Count disagreement: pcre_fullinfo=%d pcre_info=%d\n", count,
+            old_count);
+
+        if (old_first_char != first_char) fprintf(outfile,
+          "First char disagreement: pcre_fullinfo=%d pcre_info=%d\n",
+            first_char, old_first_char);
+
+        if (old_options != (int)get_options) fprintf(outfile,
+          "Options disagreement: pcre_fullinfo=%ld pcre_info=%d\n",
+            get_options, old_options);
+        }
+
+      if (size != gotten_store) fprintf(outfile,
+        "Size disagreement: pcre_fullinfo=%d call to malloc for %d\n",
+        size, gotten_store);
+
+      fprintf(outfile, "Capturing subpattern count = %d\n", count);
+      if (backrefmax > 0)
+        fprintf(outfile, "Max back reference = %d\n", backrefmax);
+
+      if (namecount > 0)
+        {
+        fprintf(outfile, "Named capturing subpatterns:\n");
+        while (namecount-- > 0)
+          {
+          fprintf(outfile, "  %s %*s%3d\n", nametable + 2,
+            nameentrysize - 3 - (int)strlen((char *)nametable + 2), "",
+            GET2(nametable, 0));
+          nametable += nameentrysize;
+          }
+        }
+
+      if (get_options == 0) fprintf(outfile, "No options\n");
+        else fprintf(outfile, "Options:%s%s%s%s%s%s%s%s%s%s\n",
+          ((get_options & PCRE_ANCHORED) != 0)? " anchored" : "",
+          ((get_options & PCRE_CASELESS) != 0)? " caseless" : "",
+          ((get_options & PCRE_EXTENDED) != 0)? " extended" : "",
+          ((get_options & PCRE_MULTILINE) != 0)? " multiline" : "",
+          ((get_options & PCRE_DOTALL) != 0)? " dotall" : "",
+          ((get_options & PCRE_DOLLAR_ENDONLY) != 0)? " dollar_endonly" : "",
+          ((get_options & PCRE_EXTRA) != 0)? " extra" : "",
+          ((get_options & PCRE_UNGREEDY) != 0)? " ungreedy" : "",
+          ((get_options & PCRE_UTF8) != 0)? " utf8" : "",
+          ((get_options & PCRE_NO_UTF8_CHECK) != 0)? " no_utf8_check" : "");
+
+      if (((((real_pcre *)re)->options) & PCRE_ICHANGED) != 0)
+        fprintf(outfile, "Case state changes\n");
+
+      if (first_char == -1)
+        {
+        fprintf(outfile, "First char at start or follows \\n\n");
+        }
+      else if (first_char < 0)
+        {
+        fprintf(outfile, "No first char\n");
+        }
+      else
+        {
+        int ch = first_char & 255;
+        const char *caseless = ((first_char & REQ_CASELESS) == 0)?
+          "" : " (caseless)";
+        if (isprint(ch))
+          fprintf(outfile, "First char = \'%c\'%s\n", ch, caseless);
+        else
+          fprintf(outfile, "First char = %d%s\n", ch, caseless);
+        }
+
+      if (need_char < 0)
+        {
+        fprintf(outfile, "No need char\n");
+        }
+      else
+        {
+        int ch = need_char & 255;
+        const char *caseless = ((need_char & REQ_CASELESS) == 0)?
+          "" : " (caseless)";
+        if (isprint(ch))
+          fprintf(outfile, "Need char = \'%c\'%s\n", ch, caseless);
+        else
+          fprintf(outfile, "Need char = %d%s\n", ch, caseless);
+        }
+      }
+
+    /* If /S was present, study the regexp to generate additional info to
+    help with the matching. */
+
+    if (do_study)
+      {
+      if (timeit)
+        {
+        register int i;
+        clock_t time_taken;
+        clock_t start_time = clock();
+        for (i = 0; i < LOOPREPEAT; i++)
+          extra = pcre_study(re, study_options, &error);
+        time_taken = clock() - start_time;
+        if (extra != NULL) free(extra);
+        fprintf(outfile, "  Study time %.3f milliseconds\n",
+          (((double)time_taken * 1000.0) / (double)LOOPREPEAT) /
+            (double)CLOCKS_PER_SEC);
+        }
+
+      extra = pcre_study(re, study_options, &error);
+      if (error != NULL)
+        fprintf(outfile, "Failed to study: %s\n", error);
+      else if (extra == NULL)
+        fprintf(outfile, "Study returned NULL\n");
+
+      /* Don't output study size; at present it is in any case a fixed
+      value, but it varies, depending on the computer architecture, and
+      so messes up the test suite. */
+
+      else if (do_showinfo)
+        {
+        size_t size;
+        uschar *start_bits = NULL;
+        new_info(re, extra, PCRE_INFO_STUDYSIZE, &size);
+        new_info(re, extra, PCRE_INFO_FIRSTTABLE, &start_bits);
+        /* fprintf(outfile, "Study size = %d\n", size); */
+        if (start_bits == NULL)
+          fprintf(outfile, "No starting character set\n");
+        else
+          {
+          int i;
+          int c = 24;
+          fprintf(outfile, "Starting character set: ");
+          for (i = 0; i < 256; i++)
+            {
+            if ((start_bits[i/8] & (1<<(i%8))) != 0)
+              {
+              if (c > 75)
+                {
+                fprintf(outfile, "\n  ");
+                c = 2;
+                }
+              if (isprint(i) && i != ' ')
+                {
+                fprintf(outfile, "%c ", i);
+                c += 2;
+                }
+              else
+                {
+                fprintf(outfile, "\\x%02x ", i);
+                c += 5;
+                }
+              }
+            }
+          fprintf(outfile, "\n");
+          }
+        }
+      }
+    }
+
+  /* Read data lines and test them */
+
+  for (;;)
+    {
+    unsigned char *q;
+    unsigned char *bptr = dbuffer;
+    int *use_offsets = offsets;
+    int use_size_offsets = size_offsets;
+    int callout_data = 0;
+    int callout_data_set = 0;
+    int count, c;
+    int copystrings = 0;
+    int find_match_limit = 0;
+    int getstrings = 0;
+    int getlist = 0;
+    int gmatched = 0;
+    int start_offset = 0;
+    int g_notempty = 0;
+
+    options = 0;
+
+    pcre_callout = callout;
+    first_callout = 1;
+    callout_extra = 0;
+    callout_count = 0;
+    callout_fail_count = 999999;
+    callout_fail_id = -1;
+    show_malloc = 0;
+
+    if (infile == stdin) printf("data> ");
+    if (fgets((char *)buffer, BUFFER_SIZE, infile) == NULL)
+      {
+      done = 1;
+      goto CONTINUE;
+      }
+    if (infile != stdin) fprintf(outfile, "%s", (char *)buffer);
+
+    len = (int)strlen((char *)buffer);
+    while (len > 0 && isspace(buffer[len-1])) len--;
+    buffer[len] = 0;
+    if (len == 0) break;
+
+    p = buffer;
+    while (isspace(*p)) p++;
+
+    q = dbuffer;
+    while ((c = *p++) != 0)
+      {
+      int i = 0;
+      int n = 0;
+
+      if (c == '\\') switch ((c = *p++))
+        {
+        case 'a': c =    7; break;
+        case 'b': c = '\b'; break;
+        case 'e': c =   27; break;
+        case 'f': c = '\f'; break;
+        case 'n': c = '\n'; break;
+        case 'r': c = '\r'; break;
+        case 't': c = '\t'; break;
+        case 'v': c = '\v'; break;
+
+        case '0': case '1': case '2': case '3':
+        case '4': case '5': case '6': case '7':
+        c -= '0';
+        while (i++ < 2 && isdigit(*p) && *p != '8' && *p != '9')
+          c = c * 8 + *p++ - '0';
+        break;
+
+        case 'x':
+
+        /* Handle \x{..} specially - new Perl thing for utf8 */
+
+        if (*p == '{')
+          {
+          unsigned char *pt = p;
+          c = 0;
+          while (isxdigit(*(++pt)))
+            c = c * 16 + tolower(*pt) - ((isdigit(*pt))? '0' : 'W');
+          if (*pt == '}')
+            {
+            unsigned char buff8[8];
+            int ii, utn;
+            utn = ord2utf8(c, buff8);
+            for (ii = 0; ii < utn - 1; ii++) *q++ = buff8[ii];
+            c = buff8[ii];   /* Last byte */
+            p = pt + 1;
+            break;
+            }
+          /* Not correct form; fall through */
+          }
+
+        /* Ordinary \x */
+
+        c = 0;
+        while (i++ < 2 && isxdigit(*p))
+          {
+          c = c * 16 + tolower(*p) - ((isdigit(*p))? '0' : 'W');
+          p++;
+          }
+        break;
+
+        case 0:   /* Allows for an empty line */
+        p--;
+        continue;
+
+        case 'A':  /* Option setting */
+        options |= PCRE_ANCHORED;
+        continue;
+
+        case 'B':
+        options |= PCRE_NOTBOL;
+        continue;
+
+        case 'C':
+        if (isdigit(*p))    /* Set copy string */
+          {
+          while(isdigit(*p)) n = n * 10 + *p++ - '0';
+          copystrings |= 1 << n;
+          }
+        else if (isalnum(*p))
+          {
+          uschar name[256];
+          uschar *npp = name;
+          while (isalnum(*p)) *npp++ = *p++;
+          *npp = 0;
+          n = pcre_get_stringnumber(re, (char *)name);
+          if (n < 0)
+            fprintf(outfile, "no parentheses with name \"%s\"\n", name);
+          else copystrings |= 1 << n;
+          }
+        else if (*p == '+')
+          {
+          callout_extra = 1;
+          p++;
+          }
+        else if (*p == '-')
+          {
+          pcre_callout = NULL;
+          p++;
+          }
+        else if (*p == '!')
+          {
+          callout_fail_id = 0;
+          p++;
+          while(isdigit(*p))
+            callout_fail_id = callout_fail_id * 10 + *p++ - '0';
+          callout_fail_count = 0;
+          if (*p == '!')
+            {
+            p++;
+            while(isdigit(*p))
+              callout_fail_count = callout_fail_count * 10 + *p++ - '0';
+            }
+          }
+        else if (*p == '*')
+          {
+          int sign = 1;
+          callout_data = 0;
+          if (*(++p) == '-') { sign = -1; p++; }
+          while(isdigit(*p))
+            callout_data = callout_data * 10 + *p++ - '0';
+          callout_data *= sign;
+          callout_data_set = 1;
+          }
+        continue;
+
+        case 'G':
+        if (isdigit(*p))
+          {
+          while(isdigit(*p)) n = n * 10 + *p++ - '0';
+          getstrings |= 1 << n;
+          }
+        else if (isalnum(*p))
+          {
+          uschar name[256];
+          uschar *npp = name;
+          while (isalnum(*p)) *npp++ = *p++;
+          *npp = 0;
+          n = pcre_get_stringnumber(re, (char *)name);
+          if (n < 0)
+            fprintf(outfile, "no parentheses with name \"%s\"\n", name);
+          else getstrings |= 1 << n;
+          }
+        continue;
+
+        case 'L':
+        getlist = 1;
+        continue;
+
+        case 'M':
+        find_match_limit = 1;
+        continue;
+
+        case 'N':
+        options |= PCRE_NOTEMPTY;
+        continue;
+
+        case 'O':
+        while(isdigit(*p)) n = n * 10 + *p++ - '0';
+        if (n > size_offsets_max)
+          {
+          size_offsets_max = n;
+          free(offsets);
+          use_offsets = offsets = (int *)malloc(size_offsets_max * sizeof(int));
+          if (offsets == NULL)
+            {
+            printf("** Failed to get %d bytes of memory for offsets vector\n",
+              size_offsets_max * sizeof(int));
+            return 1;
+            }
+          }
+        use_size_offsets = n;
+        if (n == 0) use_offsets = NULL;   /* Ensures it can't write to it */
+        continue;
+
+        case 'S':
+        show_malloc = 1;
+        continue;
+
+        case 'Z':
+        options |= PCRE_NOTEOL;
+        continue;
+
+        case '?':
+        options |= PCRE_NO_UTF8_CHECK;
+        continue;
+        }
+      *q++ = c;
+      }
+    *q = 0;
+    len = q - dbuffer;
+
+    /* Handle matching via the POSIX interface, which does not
+    support timing or playing with the match limit or callout data. */
+
+#if !defined NOPOSIX
+    if (posix || do_posix)
+      {
+      int rc;
+      int eflags = 0;
+      regmatch_t *pmatch = NULL;
+      if (use_size_offsets > 0)
+        pmatch = (regmatch_t *)malloc(sizeof(regmatch_t) * use_size_offsets);
+      if ((options & PCRE_NOTBOL) != 0) eflags |= REG_NOTBOL;
+      if ((options & PCRE_NOTEOL) != 0) eflags |= REG_NOTEOL;
+
+      rc = regexec(&preg, (const char *)bptr, use_size_offsets, pmatch, eflags);
+
+      if (rc != 0)
+        {
+        (void)regerror(rc, &preg, (char *)buffer, BUFFER_SIZE);
+        fprintf(outfile, "No match: POSIX code %d: %s\n", rc, buffer);
+        }
+      else
+        {
+        size_t i;
+        for (i = 0; i < (size_t)use_size_offsets; i++)
+          {
+          if (pmatch[i].rm_so >= 0)
+            {
+            fprintf(outfile, "%2d: ", (int)i);
+            (void)pchars(dbuffer + pmatch[i].rm_so,
+              pmatch[i].rm_eo - pmatch[i].rm_so, outfile);
+            fprintf(outfile, "\n");
+            if (i == 0 && do_showrest)
+              {
+              fprintf(outfile, " 0+ ");
+              (void)pchars(dbuffer + pmatch[i].rm_eo, len - pmatch[i].rm_eo,
+                outfile);
+              fprintf(outfile, "\n");
+              }
+            }
+          }
+        }
+      free(pmatch);
+      }
+
+    /* Handle matching via the native interface - repeats for /g and /G */
+
+    else
+#endif  /* !defined NOPOSIX */
+
+    for (;; gmatched++)    /* Loop for /g or /G */
+      {
+      if (timeit)
+        {
+        register int i;
+        clock_t time_taken;
+        clock_t start_time = clock();
+        for (i = 0; i < LOOPREPEAT; i++)
+          count = pcre_exec(re, extra, (char *)bptr, len,
+            start_offset, options | g_notempty, use_offsets, use_size_offsets);
+        time_taken = clock() - start_time;
+        fprintf(outfile, "Execute time %.3f milliseconds\n",
+          (((double)time_taken * 1000.0) / (double)LOOPREPEAT) /
+            (double)CLOCKS_PER_SEC);
+        }
+
+      /* If find_match_limit is set, we want to do repeated matches with
+      varying limits in order to find the minimum value. */
+
+      if (find_match_limit)
+        {
+        int min = 0;
+        int mid = 64;
+        int max = -1;
+
+        if (extra == NULL)
+          {
+          extra = (pcre_extra *)malloc(sizeof(pcre_extra));
+          extra->flags = 0;
+          }
+        extra->flags |= PCRE_EXTRA_MATCH_LIMIT;
+
+        for (;;)
+          {
+          extra->match_limit = mid;
+          count = pcre_exec(re, extra, (char *)bptr, len, start_offset,
+            options | g_notempty, use_offsets, use_size_offsets);
+          if (count == PCRE_ERROR_MATCHLIMIT)
+            {
+            /* fprintf(outfile, "Testing match limit = %d\n", mid); */
+            min = mid;
+            mid = (mid == max - 1)? max : (max > 0)? (min + max)/2 : mid*2;
+            }
+          else if (count >= 0 || count == PCRE_ERROR_NOMATCH)
+            {
+            if (mid == min + 1)
+              {
+              fprintf(outfile, "Minimum match limit = %d\n", mid);
+              break;
+              }
+            /* fprintf(outfile, "Testing match limit = %d\n", mid); */
+            max = mid;
+            mid = (min + mid)/2;
+            }
+          else break;    /* Some other error */
+          }
+
+        extra->flags &= ~PCRE_EXTRA_MATCH_LIMIT;
+        }
+
+      /* If callout_data is set, use the interface with additional data */
+
+      else if (callout_data_set)
+        {
+        if (extra == NULL)
+          {
+          extra = (pcre_extra *)malloc(sizeof(pcre_extra));
+          extra->flags = 0;
+          }
+        extra->flags |= PCRE_EXTRA_CALLOUT_DATA;
+        extra->callout_data = &callout_data;
+        count = pcre_exec(re, extra, (char *)bptr, len, start_offset,
+          options | g_notempty, use_offsets, use_size_offsets);
+        extra->flags &= ~PCRE_EXTRA_CALLOUT_DATA;
+        }
+
+      /* The normal case is just to do the match once, with the default
+      value of match_limit. */
+
+      else count = pcre_exec(re, extra, (char *)bptr, len,
+        start_offset, options | g_notempty, use_offsets, use_size_offsets);
+
+      if (count == 0)
+        {
+        fprintf(outfile, "Matched, but too many substrings\n");
+        count = use_size_offsets/3;
+        }
+
+      /* Matched */
+
+      if (count >= 0)
+        {
+        int i;
+        for (i = 0; i < count * 2; i += 2)
+          {
+          if (use_offsets[i] < 0)
+            fprintf(outfile, "%2d: <unset>\n", i/2);
+          else
+            {
+            fprintf(outfile, "%2d: ", i/2);
+            (void)pchars(bptr + use_offsets[i],
+              use_offsets[i+1] - use_offsets[i], outfile);
+            fprintf(outfile, "\n");
+            if (i == 0)
+              {
+              if (do_showrest)
+                {
+                fprintf(outfile, " 0+ ");
+                (void)pchars(bptr + use_offsets[i+1], len - use_offsets[i+1],
+                  outfile);
+                fprintf(outfile, "\n");
+                }
+              }
+            }
+          }
+
+        for (i = 0; i < 32; i++)
+          {
+          if ((copystrings & (1 << i)) != 0)
+            {
+            char copybuffer[16];
+            int rc = pcre_copy_substring((char *)bptr, use_offsets, count,
+              i, copybuffer, sizeof(copybuffer));
+            if (rc < 0)
+              fprintf(outfile, "copy substring %d failed %d\n", i, rc);
+            else
+              fprintf(outfile, "%2dC %s (%d)\n", i, copybuffer, rc);
+            }
+          }
+
+        for (i = 0; i < 32; i++)
+          {
+          if ((getstrings & (1 << i)) != 0)
+            {
+            const char *substring;
+            int rc = pcre_get_substring((char *)bptr, use_offsets, count,
+              i, &substring);
+            if (rc < 0)
+              fprintf(outfile, "get substring %d failed %d\n", i, rc);
+            else
+              {
+              fprintf(outfile, "%2dG %s (%d)\n", i, substring, rc);
+              /* free((void *)substring); */
+              pcre_free_substring(substring);
+              }
+            }
+          }
+
+        if (getlist)
+          {
+          const char **stringlist;
+          int rc = pcre_get_substring_list((char *)bptr, use_offsets, count,
+            &stringlist);
+          if (rc < 0)
+            fprintf(outfile, "get substring list failed %d\n", rc);
+          else
+            {
+            for (i = 0; i < count; i++)
+              fprintf(outfile, "%2dL %s\n", i, stringlist[i]);
+            if (stringlist[i] != NULL)
+              fprintf(outfile, "string list not terminated by NULL\n");
+            /* free((void *)stringlist); */
+            pcre_free_substring_list(stringlist);
+            }
+          }
+        }
+
+      /* Failed to match. If this is a /g or /G loop and we previously set
+      g_notempty after a null match, this is not necessarily the end.
+      We want to advance the start offset, and continue. In the case of UTF-8
+      matching, the advance must be one character, not one byte. Fudge the
+      offset values to achieve this. We won't be at the end of the string -
+      that was checked before setting g_notempty. */
+
+      else
+        {
+        if (g_notempty != 0)
+          {
+          int onechar = 1;
+          use_offsets[0] = start_offset;
+          if (use_utf8)
+            {
+            while (start_offset + onechar < len)
+              {
+              int tb = bptr[start_offset+onechar];
+              if (tb <= 127) break;
+              tb &= 0xc0;
+              if (tb != 0 && tb != 0xc0) onechar++;
+              }
+            }
+          use_offsets[1] = start_offset + onechar;
+          }
+        else
+          {
+          if (count == PCRE_ERROR_NOMATCH)
+            {
+            if (gmatched == 0) fprintf(outfile, "No match\n");
+            }
+          else fprintf(outfile, "Error %d\n", count);
+          break;  /* Out of the /g loop */
+          }
+        }
+
+      /* If not /g or /G we are done */
+
+      if (!do_g && !do_G) break;
+
+      /* If we have matched an empty string, first check to see if we are at
+      the end of the subject. If so, the /g loop is over. Otherwise, mimic
+      what Perl's /g options does. This turns out to be rather cunning. First
+      we set PCRE_NOTEMPTY and PCRE_ANCHORED and try the match again at the
+      same point. If this fails (picked up above) we advance to the next
+      character. */
+
+      g_notempty = 0;
+      if (use_offsets[0] == use_offsets[1])
+        {
+        if (use_offsets[0] == len) break;
+        g_notempty = PCRE_NOTEMPTY | PCRE_ANCHORED;
+        }
+
+      /* For /g, update the start offset, leaving the rest alone */
+
+      if (do_g) start_offset = use_offsets[1];
+
+      /* For /G, update the pointer and length */
+
+      else
+        {
+        bptr += use_offsets[1];
+        len -= use_offsets[1];
+        }
+      }  /* End of loop for /g and /G */
+    }    /* End of loop for data lines */
+
+  CONTINUE:
+
+#if !defined NOPOSIX
+  if (posix || do_posix) regfree(&preg);
+#endif
+
+  if (re != NULL) free(re);
+  if (extra != NULL) free(extra);
+  if (tables != NULL)
+    {
+    free((void *)tables);
+    setlocale(LC_CTYPE, "C");
+    }
+  }
+
+if (infile == stdin) fprintf(outfile, "\n");
+return 0;
+}
+
+/* End */
diff --git a/external-libs/pcre/perltest b/external-libs/pcre/perltest
new file mode 100644
index 00000000..bb34cc83
--- /dev/null
+++ b/external-libs/pcre/perltest
@@ -0,0 +1,211 @@
+#! /usr/bin/perl
+
+# Program for testing regular expressions with perl to check that PCRE handles
+# them the same. This is the version that supports /8 for UTF-8 testing. As it
+# stands, it requires at least Perl 5.8 for UTF-8 support. For Perl 5.6, it
+# can be used as is for non-UTF-8 testing, but you have to uncomment the
+# "use utf8" lines in order to to UTF-8 stuff (and you mustn't uncomment them
+# for non-UTF-8 use).
+
+
+# Function for turning a string into a string of printing chars. There are
+# currently problems with UTF-8 strings; this fudges round them.
+
+sub pchars {
+my($t) = "";
+
+if ($utf8)
+  {
+#  use utf8;                    <=============== For UTF-8 in Perl 5.6
+  @p = unpack('U*', $_[0]);
+  foreach $c (@p)
+    {
+    if ($c >= 32 && $c < 127) { $t .= chr $c; }
+      else { $t .= sprintf("\\x{%02x}", $c); }
+    }
+  }
+
+else
+  {
+  foreach $c (split(//, $_[0]))
+    {
+    if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
+      else { $t .= sprintf("\\x%02x", ord $c); }
+    }
+  }
+
+$t;
+}
+
+
+
+# Read lines from named file or stdin and write to named file or stdout; lines
+# consist of a regular expression, in delimiters and optionally followed by
+# options, followed by a set of test data, terminated by an empty line.
+
+# Sort out the input and output files
+
+if (@ARGV > 0)
+  {
+  open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
+  $infile = "INFILE";
+  }
+else { $infile = "STDIN"; }
+
+if (@ARGV > 1)
+  {
+  open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
+  $outfile = "OUTFILE";
+  }
+else { $outfile = "STDOUT"; }
+
+printf($outfile "Perl $] Regular Expressions\n\n");
+
+# Main loop
+
+NEXT_RE:
+for (;;)
+  {
+  printf "  re> " if $infile eq "STDIN";
+  last if ! ($_ = <$infile>);
+  printf $outfile "$_" if $infile ne "STDIN";
+  next if ($_ eq "");
+
+  $pattern = $_;
+
+  while ($pattern !~ /^\s*(.).*\1/s)
+    {
+    printf "    > " if $infile eq "STDIN";
+    last if ! ($_ = <$infile>);
+    printf $outfile "$_" if $infile ne "STDIN";
+    $pattern .= $_;
+    }
+
+   chomp($pattern);
+   $pattern =~ s/\s+$//;
+
+  # The private /+ modifier means "print $' afterwards".
+
+  $showrest = ($pattern =~ s/\+(?=[a-z]*$)//);
+
+  # The private /8 modifier means "operate in UTF-8". Currently, Perl
+  # has bugs that we try to work around using this flag.
+
+  $utf8 = ($pattern =~ s/8(?=[a-z]*$)//);
+
+  # Check that the pattern is valid
+
+  if ($utf8)
+    {
+#    use utf8;                    <=============== For UTF-8 in Perl 5.6
+    eval "\$_ =~ ${pattern}";
+    }
+  else
+    {
+    eval "\$_ =~ ${pattern}";
+    }
+
+  if ($@)
+    {
+    printf $outfile "Error: $@";
+    next NEXT_RE;
+    }
+
+  # If the /g modifier is present, we want to put a loop round the matching;
+  # otherwise just a single "if".
+
+  $cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
+
+  # If the pattern is actually the null string, Perl uses the most recently
+  # executed (and successfully compiled) regex is used instead. This is a
+  # nasty trap for the unwary! The PCRE test suite does contain null strings
+  # in places - if they are allowed through here all sorts of weird and
+  # unexpected effects happen. To avoid this, we replace such patterns with
+  # a non-null pattern that has the same effect.
+
+  $pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
+
+  # Read data lines and test them
+
+  for (;;)
+    {
+    printf "data> " if $infile eq "STDIN";
+    last NEXT_RE if ! ($_ = <$infile>);
+    chomp;
+    printf $outfile "$_\n" if $infile ne "STDIN";
+
+    s/\s+$//;
+    s/^\s+//;
+
+    last if ($_ eq "");
+
+    $x = eval "\"$_\"";   # To get escapes processed
+
+    # Empty array for holding results, then do the matching.
+
+    @subs = ();
+
+    $pushes = "push \@subs,\$&;" .
+         "push \@subs,\$1;" .
+         "push \@subs,\$2;" .
+         "push \@subs,\$3;" .
+         "push \@subs,\$4;" .
+         "push \@subs,\$5;" .
+         "push \@subs,\$6;" .
+         "push \@subs,\$7;" .
+         "push \@subs,\$8;" .
+         "push \@subs,\$9;" .
+         "push \@subs,\$10;" .
+         "push \@subs,\$11;" .
+         "push \@subs,\$12;" .
+         "push \@subs,\$13;" .
+         "push \@subs,\$14;" .
+         "push \@subs,\$15;" .
+         "push \@subs,\$16;" .
+         "push \@subs,\$'; }";
+
+    if ($utf8)
+      {
+#      use utf8;                    <=============== For UTF-8 in Perl 5.6
+      eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
+      }
+    else
+      {
+      eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
+      }
+
+    if ($@)
+      {
+      printf $outfile "Error: $@\n";
+      next NEXT_RE;
+      }
+    elsif (scalar(@subs) == 0)
+      {
+      printf $outfile "No match\n";
+      }
+    else
+      {
+      while (scalar(@subs) != 0)
+        {
+        printf $outfile (" 0: %s\n", &pchars($subs[0]));
+        printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
+        $last_printed = 0;
+        for ($i = 1; $i <= 16; $i++)
+          {
+          if (defined $subs[$i])
+            {
+            while ($last_printed++ < $i-1)
+              { printf $outfile ("%2d: <unset>\n", $last_printed); }
+            printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
+            $last_printed = $i;
+            }
+          }
+        splice(@subs, 0, 18);
+        }
+      }
+    }
+  }
+
+printf $outfile "\n";
+
+# End
diff --git a/external-libs/pcre/printint.c b/external-libs/pcre/printint.c
new file mode 100644
index 00000000..3d40f116
--- /dev/null
+++ b/external-libs/pcre/printint.c
@@ -0,0 +1,360 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+
+/* This module contains a debugging function for printing out the internal form
+of a compiled regular expression. It is kept in a separate file so that it can
+be #included both in the pcretest program, and in the library itself when
+compiled with the debugging switch. */
+
+
+static const char *OP_names[] = { OP_NAME_LIST };
+
+
+/*************************************************
+*       Print single- or multi-byte character    *
+*************************************************/
+
+/* These tables are actually copies of ones in pcre.c. If we compile the
+library with debugging, they are included twice, but that isn't really a
+problem - compiling with debugging is pretty rare and these are very small. */
+
+static const int utf8_t3[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};
+
+static const uschar utf8_t4[] = {
+  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+  3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 };
+
+static int
+print_char(FILE *f, uschar *ptr, BOOL utf8)
+{
+int c = *ptr;
+
+if (!utf8 || (c & 0xc0) != 0xc0)
+  {
+  if (isprint(c)) fprintf(f, "%c", c); else fprintf(f, "\\x%02x", c);
+  return 0;
+  }
+else
+  {
+  int i;
+  int a = utf8_t4[c & 0x3f];  /* Number of additional bytes */
+  int s = 6*a;
+  c = (c & utf8_t3[a]) << s;
+  for (i = 1; i <= a; i++)
+    {
+    s -= 6;
+    c |= (ptr[i] & 0x3f) << s;
+    }
+  if (c < 128) fprintf(f, "\\x%02x", c); else fprintf(f, "\\x{%x}", c);
+  return a;
+  }
+}
+
+
+
+
+/*************************************************
+*         Print compiled regex                   *
+*************************************************/
+
+static void
+print_internals(pcre *external_re, FILE *f)
+{
+real_pcre *re = (real_pcre *)external_re;
+uschar *codestart =
+  (uschar *)re + sizeof(real_pcre) + re->name_count * re->name_entry_size;
+uschar *code = codestart;
+BOOL utf8 = (re->options & PCRE_UTF8) != 0;
+
+for(;;)
+  {
+  uschar *ccode;
+  int c;
+  int extra = 0;
+
+  fprintf(f, "%3d ", code - codestart);
+
+  if (*code >= OP_BRA)
+    {
+    if (*code - OP_BRA > EXTRACT_BASIC_MAX)
+      fprintf(f, "%3d Bra extra\n", GET(code, 1));
+    else
+      fprintf(f, "%3d Bra %d\n", GET(code, 1), *code - OP_BRA);
+    code += OP_lengths[OP_BRA];
+    continue;
+    }
+
+  switch(*code)
+    {
+    case OP_END:
+    fprintf(f, "    %s\n", OP_names[*code]);
+    fprintf(f, "------------------------------------------------------------------\n");
+    return;
+
+    case OP_OPT:
+    fprintf(f, " %.2x %s", code[1], OP_names[*code]);
+    break;
+
+    case OP_CHARS:
+      {
+      int charlength = code[1];
+      ccode = code + 2;
+      extra = charlength;
+      fprintf(f, "%3d ", charlength);
+      while (charlength > 0)
+        {
+        int extrabytes = print_char(f, ccode, utf8);
+        ccode += 1 + extrabytes;
+        charlength -= 1 + extrabytes;
+        }
+      }
+    break;
+
+    case OP_KETRMAX:
+    case OP_KETRMIN:
+    case OP_ALT:
+    case OP_KET:
+    case OP_ASSERT:
+    case OP_ASSERT_NOT:
+    case OP_ASSERTBACK:
+    case OP_ASSERTBACK_NOT:
+    case OP_ONCE:
+    case OP_COND:
+    case OP_REVERSE:
+    fprintf(f, "%3d %s", GET(code, 1), OP_names[*code]);
+    break;
+
+    case OP_BRANUMBER:
+    printf("%3d %s", GET2(code, 1), OP_names[*code]);
+    break;
+
+    case OP_CREF:
+    if (GET2(code, 1) == CREF_RECURSE)
+      fprintf(f, "    Cond recurse");
+    else
+      fprintf(f, "%3d %s", GET2(code,1), OP_names[*code]);
+    break;
+
+    case OP_STAR:
+    case OP_MINSTAR:
+    case OP_PLUS:
+    case OP_MINPLUS:
+    case OP_QUERY:
+    case OP_MINQUERY:
+    case OP_TYPESTAR:
+    case OP_TYPEMINSTAR:
+    case OP_TYPEPLUS:
+    case OP_TYPEMINPLUS:
+    case OP_TYPEQUERY:
+    case OP_TYPEMINQUERY:
+    fprintf(f, "    ");
+    if (*code >= OP_TYPESTAR) fprintf(f, "%s", OP_names[code[1]]);
+      else extra = print_char(f, code+1, utf8);
+    fprintf(f, "%s", OP_names[*code]);
+    break;
+
+    case OP_EXACT:
+    case OP_UPTO:
+    case OP_MINUPTO:
+    fprintf(f, "    ");
+    extra = print_char(f, code+3, utf8);
+    fprintf(f, "{");
+    if (*code != OP_EXACT) fprintf(f, ",");
+    fprintf(f, "%d}", GET2(code,1));
+    if (*code == OP_MINUPTO) fprintf(f, "?");
+    break;
+
+    case OP_TYPEEXACT:
+    case OP_TYPEUPTO:
+    case OP_TYPEMINUPTO:
+    fprintf(f, "    %s{", OP_names[code[3]]);
+    if (*code != OP_TYPEEXACT) fprintf(f, "0,");
+    fprintf(f, "%d}", GET2(code,1));
+    if (*code == OP_TYPEMINUPTO) fprintf(f, "?");
+    break;
+
+    case OP_NOT:
+    if (isprint(c = code[1])) fprintf(f, "    [^%c]", c);
+      else fprintf(f, "    [^\\x%02x]", c);
+    break;
+
+    case OP_NOTSTAR:
+    case OP_NOTMINSTAR:
+    case OP_NOTPLUS:
+    case OP_NOTMINPLUS:
+    case OP_NOTQUERY:
+    case OP_NOTMINQUERY:
+    if (isprint(c = code[1])) fprintf(f, "    [^%c]", c);
+      else fprintf(f, "    [^\\x%02x]", c);
+    fprintf(f, "%s", OP_names[*code]);
+    break;
+
+    case OP_NOTEXACT:
+    case OP_NOTUPTO:
+    case OP_NOTMINUPTO:
+    if (isprint(c = code[3])) fprintf(f, "    [^%c]{", c);
+      else fprintf(f, "    [^\\x%02x]{", c);
+    if (*code != OP_NOTEXACT) fprintf(f, ",");
+    fprintf(f, "%d}", GET2(code,1));
+    if (*code == OP_NOTMINUPTO) fprintf(f, "?");
+    break;
+
+    case OP_RECURSE:
+    fprintf(f, "%3d %s", GET(code, 1), OP_names[*code]);
+    break;
+
+    case OP_REF:
+    fprintf(f, "    \\%d", GET2(code,1));
+    ccode = code + OP_lengths[*code];
+    goto CLASS_REF_REPEAT;
+
+    case OP_CALLOUT:
+    fprintf(f, "    %s %d", OP_names[*code], code[1]);
+    break;
+
+    /* OP_XCLASS can only occur in UTF-8 mode. However, there's no harm in
+    having this code always here, and it makes it less messy without all those
+    #ifdefs. */
+
+    case OP_CLASS:
+    case OP_NCLASS:
+    case OP_XCLASS:
+      {
+      int i, min, max;
+      BOOL printmap;
+
+      fprintf(f, "    [");
+
+      if (*code == OP_XCLASS)
+        {
+        extra = GET(code, 1);
+        ccode = code + LINK_SIZE + 1;
+        printmap = (*ccode & XCL_MAP) != 0;
+        if ((*ccode++ & XCL_NOT) != 0) fprintf(f, "^");
+        }
+      else
+        {
+        printmap = TRUE;
+        ccode = code + 1;
+        }
+
+      /* Print a bit map */
+
+      if (printmap)
+        {
+        for (i = 0; i < 256; i++)
+          {
+          if ((ccode[i/8] & (1 << (i&7))) != 0)
+            {
+            int j;
+            for (j = i+1; j < 256; j++)
+              if ((ccode[j/8] & (1 << (j&7))) == 0) break;
+            if (i == '-' || i == ']') fprintf(f, "\\");
+            if (isprint(i)) fprintf(f, "%c", i); else fprintf(f, "\\x%02x", i);
+            if (--j > i)
+              {
+              fprintf(f, "-");
+              if (j == '-' || j == ']') fprintf(f, "\\");
+              if (isprint(j)) fprintf(f, "%c", j); else fprintf(f, "\\x%02x", j);
+              }
+            i = j;
+            }
+          }
+        ccode += 32;
+        }
+
+      /* For an XCLASS there is always some additional data */
+
+      if (*code == OP_XCLASS)
+        {
+        int ch;
+        while ((ch = *ccode++) != XCL_END)
+          {
+          ccode += 1 + print_char(f, ccode, TRUE);
+          if (ch == XCL_RANGE)
+            {
+            fprintf(f, "-");
+            ccode += 1 + print_char(f, ccode, TRUE);
+            }
+          }
+        }
+
+      /* Indicate a non-UTF8 class which was created by negation */
+
+      fprintf(f, "]%s", (*code == OP_NCLASS)? " (neg)" : "");
+
+      /* Handle repeats after a class or a back reference */
+
+      CLASS_REF_REPEAT:
+      switch(*ccode)
+        {
+        case OP_CRSTAR:
+        case OP_CRMINSTAR:
+        case OP_CRPLUS:
+        case OP_CRMINPLUS:
+        case OP_CRQUERY:
+        case OP_CRMINQUERY:
+        fprintf(f, "%s", OP_names[*ccode]);
+        extra = OP_lengths[*ccode];
+        break;
+
+        case OP_CRRANGE:
+        case OP_CRMINRANGE:
+        min = GET2(ccode,1);
+        max = GET2(ccode,3);
+        if (max == 0) fprintf(f, "{%d,}", min);
+        else fprintf(f, "{%d,%d}", min, max);
+        if (*ccode == OP_CRMINRANGE) fprintf(f, "?");
+        extra = OP_lengths[*ccode];
+        break;
+        }
+      }
+    break;
+
+    /* Anything else is just an item with no data*/
+
+    default:
+    fprintf(f, "    %s", OP_names[*code]);
+    break;
+    }
+
+  code += OP_lengths[*code] + extra;
+  fprintf(f, "\n");
+  }
+}
+
+/* End of printint.c */
diff --git a/external-libs/pcre/study.c b/external-libs/pcre/study.c
new file mode 100644
index 00000000..a40f7216
--- /dev/null
+++ b/external-libs/pcre/study.c
@@ -0,0 +1,472 @@
+/*************************************************
+*      Perl-Compatible Regular Expressions       *
+*************************************************/
+
+/*
+This is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+           Copyright (c) 1997-2003 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+   explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+   General Purpose Licence (GPL), then the terms of that licence shall
+   supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+
+/* Include the internals header, which itself includes Standard C headers plus
+the external pcre header. */
+
+#include "internal.h"
+
+
+
+/*************************************************
+*      Set a bit and maybe its alternate case    *
+*************************************************/
+
+/* Given a character, set its bit in the table, and also the bit for the other
+version of a letter if we are caseless.
+
+Arguments:
+  start_bits    points to the bit map
+  c             is the character
+  caseless      the caseless flag
+  cd            the block with char table pointers
+
+Returns:        nothing
+*/
+
+static void
+set_bit(uschar *start_bits, int c, BOOL caseless, compile_data *cd)
+{
+start_bits[c/8] |= (1 << (c&7));
+if (caseless && (cd->ctypes[c] & ctype_letter) != 0)
+  start_bits[cd->fcc[c]/8] |= (1 << (cd->fcc[c]&7));
+}
+
+
+
+/*************************************************
+*          Create bitmap of starting chars       *
+*************************************************/
+
+/* This function scans a compiled unanchored expression and attempts to build a
+bitmap of the set of initial characters. If it can't, it returns FALSE. As time
+goes by, we may be able to get more clever at doing this.
+
+Arguments:
+  code         points to an expression
+  start_bits   points to a 32-byte table, initialized to 0
+  caseless     the current state of the caseless flag
+  utf8         TRUE if in UTF-8 mode
+  cd           the block with char table pointers
+
+Returns:       TRUE if table built, FALSE otherwise
+*/
+
+static BOOL
+set_start_bits(const uschar *code, uschar *start_bits, BOOL caseless,
+  BOOL utf8, compile_data *cd)
+{
+register int c;
+
+/* This next statement and the later reference to dummy are here in order to
+trick the optimizer of the IBM C compiler for OS/2 into generating correct
+code. Apparently IBM isn't going to fix the problem, and we would rather not
+disable optimization (in this module it actually makes a big difference, and
+the pcre module can use all the optimization it can get). */
+
+volatile int dummy;
+
+do
+  {
+  const uschar *tcode = code + 1 + LINK_SIZE;
+  BOOL try_next = TRUE;
+
+  while (try_next)
+    {
+    /* If a branch starts with a bracket or a positive lookahead assertion,
+    recurse to set bits from within them. That's all for this branch. */
+
+    if ((int)*tcode >= OP_BRA || *tcode == OP_ASSERT)
+      {
+      if (!set_start_bits(tcode, start_bits, caseless, utf8, cd))
+        return FALSE;
+      try_next = FALSE;
+      }
+
+    else switch(*tcode)
+      {
+      default:
+      return FALSE;
+
+      /* Skip over callout */
+
+      case OP_CALLOUT:
+      tcode += 2;
+      break;
+
+      /* Skip over extended extraction bracket number */
+
+      case OP_BRANUMBER:
+      tcode += 3;
+      break;
+
+      /* Skip over lookbehind and negative lookahead assertions */
+
+      case OP_ASSERT_NOT:
+      case OP_ASSERTBACK:
+      case OP_ASSERTBACK_NOT:
+      do tcode += GET(tcode, 1); while (*tcode == OP_ALT);
+      tcode += 1+LINK_SIZE;
+      break;
+
+      /* Skip over an option setting, changing the caseless flag */
+
+      case OP_OPT:
+      caseless = (tcode[1] & PCRE_CASELESS) != 0;
+      tcode += 2;
+      break;
+
+      /* BRAZERO does the bracket, but carries on. */
+
+      case OP_BRAZERO:
+      case OP_BRAMINZERO:
+      if (!set_start_bits(++tcode, start_bits, caseless, utf8, cd))
+        return FALSE;
+      dummy = 1;
+      do tcode += GET(tcode,1); while (*tcode == OP_ALT);
+      tcode += 1+LINK_SIZE;
+      break;
+
+      /* Single-char * or ? sets the bit and tries the next item */
+
+      case OP_STAR:
+      case OP_MINSTAR:
+      case OP_QUERY:
+      case OP_MINQUERY:
+      set_bit(start_bits, tcode[1], caseless, cd);
+      tcode += 2;
+#ifdef SUPPORT_UTF8
+      if (utf8) while ((*tcode & 0xc0) == 0x80) tcode++;
+#endif
+      break;
+
+      /* Single-char upto sets the bit and tries the next */
+
+      case OP_UPTO:
+      case OP_MINUPTO:
+      set_bit(start_bits, tcode[3], caseless, cd);
+      tcode += 4;
+#ifdef SUPPORT_UTF8
+      if (utf8) while ((*tcode & 0xc0) == 0x80) tcode++;
+#endif
+      break;
+
+      /* At least one single char sets the bit and stops */
+
+      case OP_EXACT:       /* Fall through */
+      tcode++;
+
+      case OP_CHARS:       /* Fall through */
+      tcode++;
+
+      case OP_PLUS:
+      case OP_MINPLUS:
+      set_bit(start_bits, tcode[1], caseless, cd);
+      try_next = FALSE;
+      break;
+
+      /* Single character type sets the bits and stops */
+
+      case OP_NOT_DIGIT:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= ~cd->cbits[c+cbit_digit];
+      try_next = FALSE;
+      break;
+
+      case OP_DIGIT:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= cd->cbits[c+cbit_digit];
+      try_next = FALSE;
+      break;
+
+      case OP_NOT_WHITESPACE:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= ~cd->cbits[c+cbit_space];
+      try_next = FALSE;
+      break;
+
+      case OP_WHITESPACE:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= cd->cbits[c+cbit_space];
+      try_next = FALSE;
+      break;
+
+      case OP_NOT_WORDCHAR:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= ~cd->cbits[c+cbit_word];
+      try_next = FALSE;
+      break;
+
+      case OP_WORDCHAR:
+      for (c = 0; c < 32; c++)
+        start_bits[c] |= cd->cbits[c+cbit_word];
+      try_next = FALSE;
+      break;
+
+      /* One or more character type fudges the pointer and restarts, knowing
+      it will hit a single character type and stop there. */
+
+      case OP_TYPEPLUS:
+      case OP_TYPEMINPLUS:
+      tcode++;
+      break;
+
+      case OP_TYPEEXACT:
+      tcode += 3;
+      break;
+
+      /* Zero or more repeats of character types set the bits and then
+      try again. */
+
+      case OP_TYPEUPTO:
+      case OP_TYPEMINUPTO:
+      tcode += 2;               /* Fall through */
+
+      case OP_TYPESTAR:
+      case OP_TYPEMINSTAR:
+      case OP_TYPEQUERY:
+      case OP_TYPEMINQUERY:
+      switch(tcode[1])
+        {
+        case OP_ANY:
+        return FALSE;
+
+        case OP_NOT_DIGIT:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= ~cd->cbits[c+cbit_digit];
+        break;
+
+        case OP_DIGIT:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= cd->cbits[c+cbit_digit];
+        break;
+
+        case OP_NOT_WHITESPACE:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= ~cd->cbits[c+cbit_space];
+        break;
+
+        case OP_WHITESPACE:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= cd->cbits[c+cbit_space];
+        break;
+
+        case OP_NOT_WORDCHAR:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= ~cd->cbits[c+cbit_word];
+        break;
+
+        case OP_WORDCHAR:
+        for (c = 0; c < 32; c++)
+          start_bits[c] |= cd->cbits[c+cbit_word];
+        break;
+        }
+
+      tcode += 2;
+      break;
+
+      /* Character class where all the information is in a bit map: set the
+      bits and either carry on or not, according to the repeat count. If it was
+      a negative class, and we are operating with UTF-8 characters, any byte
+      with a value >= 0xc4 is a potentially valid starter because it starts a
+      character with a value > 255. */
+
+      case OP_NCLASS:
+      if (utf8)
+        {
+        start_bits[24] |= 0xf0;              /* Bits for 0xc4 - 0xc8 */
+        memset(start_bits+25, 0xff, 7);      /* Bits for 0xc9 - 0xff */
+        }
+      /* Fall through */
+
+      case OP_CLASS:
+        {
+        tcode++;
+
+        /* In UTF-8 mode, the bits in a bit map correspond to character
+        values, not to byte values. However, the bit map we are constructing is
+        for byte values. So we have to do a conversion for characters whose
+        value is > 127. In fact, there are only two possible starting bytes for
+        characters in the range 128 - 255. */
+
+        if (utf8)
+          {
+          for (c = 0; c < 16; c++) start_bits[c] |= tcode[c];
+          for (c = 128; c < 256; c++)
+            {
+            if ((tcode[c/8] && (1 << (c&7))) != 0)
+              {
+              int d = (c >> 6) | 0xc0;            /* Set bit for this starter */
+              start_bits[d/8] |= (1 << (d&7));    /* and then skip on to the */
+              c = (c & 0xc0) + 0x40 - 1;          /* next relevant character. */
+              }
+            }
+          }
+
+        /* In non-UTF-8 mode, the two bit maps are completely compatible. */
+
+        else
+          {
+          for (c = 0; c < 32; c++) start_bits[c] |= tcode[c];
+          }
+
+        /* Advance past the bit map, and act on what follows */
+
+        tcode += 32;
+        switch (*tcode)
+          {
+          case OP_CRSTAR:
+          case OP_CRMINSTAR:
+          case OP_CRQUERY:
+          case OP_CRMINQUERY:
+          tcode++;
+          break;
+
+          case OP_CRRANGE:
+          case OP_CRMINRANGE:
+          if (((tcode[1] << 8) + tcode[2]) == 0) tcode += 5;
+            else try_next = FALSE;
+          break;
+
+          default:
+          try_next = FALSE;
+          break;
+          }
+        }
+      break; /* End of bitmap class handling */
+
+      }      /* End of switch */
+    }        /* End of try_next loop */
+
+  code += GET(code, 1);   /* Advance to next branch */
+  }
+while (*code == OP_ALT);
+return TRUE;
+}
+
+
+
+/*************************************************
+*          Study a compiled expression           *
+*************************************************/
+
+/* This function is handed a compiled expression that it must study to produce
+information that will speed up the matching. It returns a pcre_extra block
+which then gets handed back to pcre_exec().
+
+Arguments:
+  re        points to the compiled expression
+  options   contains option bits
+  errorptr  points to where to place error messages;
+            set NULL unless error
+
+Returns:    pointer to a pcre_extra block, with study_data filled in and the
+              appropriate flag set;
+            NULL on error or if no optimization possible
+*/
+
+EXPORT pcre_extra *
+pcre_study(const pcre *external_re, int options, const char **errorptr)
+{
+uschar start_bits[32];
+pcre_extra *extra;
+pcre_study_data *study;
+const real_pcre *re = (const real_pcre *)external_re;
+uschar *code = (uschar *)re + sizeof(real_pcre) +
+  (re->name_count * re->name_entry_size);
+compile_data compile_block;
+
+*errorptr = NULL;
+
+if (re == NULL || re->magic_number != MAGIC_NUMBER)
+  {
+  *errorptr = "argument is not a compiled regular expression";
+  return NULL;
+  }
+
+if ((options & ~PUBLIC_STUDY_OPTIONS) != 0)
+  {
+  *errorptr = "unknown or incorrect option bit(s) set";
+  return NULL;
+  }
+
+/* For an anchored pattern, or an unanchored pattern that has a first char, or
+a multiline pattern that matches only at "line starts", no further processing
+at present. */
+
+if ((re->options & (PCRE_ANCHORED|PCRE_FIRSTSET|PCRE_STARTLINE)) != 0)
+  return NULL;
+
+/* Set the character tables in the block which is passed around */
+
+compile_block.lcc = re->tables + lcc_offset;
+compile_block.fcc = re->tables + fcc_offset;
+compile_block.cbits = re->tables + cbits_offset;
+compile_block.ctypes = re->tables + ctypes_offset;
+
+/* See if we can find a fixed set of initial characters for the pattern. */
+
+memset(start_bits, 0, 32 * sizeof(uschar));
+if (!set_start_bits(code, start_bits, (re->options & PCRE_CASELESS) != 0,
+  (re->options & PCRE_UTF8) != 0, &compile_block)) return NULL;
+
+/* Get a pcre_extra block and a pcre_study_data block. The study data is put in
+the latter, which is pointed to by the former, which may also get additional
+data set later by the calling program. At the moment, the size of
+pcre_study_data is fixed. We nevertheless save it in a field for returning via
+the pcre_fullinfo() function so that if it becomes variable in the future, we
+don't have to change that code. */
+
+extra = (pcre_extra *)(pcre_malloc)
+  (sizeof(pcre_extra) + sizeof(pcre_study_data));
+
+if (extra == NULL)
+  {
+  *errorptr = "failed to get memory";
+  return NULL;
+  }
+
+study = (pcre_study_data *)((char *)extra + sizeof(pcre_extra));
+extra->flags = PCRE_EXTRA_STUDY_DATA;
+extra->study_data = study;
+
+study->size = sizeof(pcre_study_data);
+study->options = PCRE_STUDY_MAPPED;
+memcpy(study->start_bits, start_bits, sizeof(start_bits));
+
+return extra;
+}
+
+/* End of study.c */
diff --git a/external-libs/pcre/testdata/testinput1 b/external-libs/pcre/testdata/testinput1
new file mode 100644
index 00000000..c4b99c66
--- /dev/null
+++ b/external-libs/pcre/testdata/testinput1
@@ -0,0 +1,3841 @@
+/the quick brown fox/
+    the quick brown fox
+    The quick brown FOX
+    What do you know about the quick brown fox?
+    What do you know about THE QUICK BROWN FOX?
+
+/The quick brown fox/i
+    the quick brown fox
+    The quick brown FOX
+    What do you know about the quick brown fox?
+    What do you know about THE QUICK BROWN FOX?
+
+/abcd\t\n\r\f\a\e\071\x3b\$\\\?caxyz/
+    abcd\t\n\r\f\a\e9;\$\\?caxyz
+
+/a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz/
+    abxyzpqrrrabbxyyyypqAzz
+    abxyzpqrrrabbxyyyypqAzz
+    aabxyzpqrrrabbxyyyypqAzz
+    aaabxyzpqrrrabbxyyyypqAzz
+    aaaabxyzpqrrrabbxyyyypqAzz
+    abcxyzpqrrrabbxyyyypqAzz
+    aabcxyzpqrrrabbxyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypAzz
+    aaabcxyzpqrrrabbxyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqqqAzz
+    aaaabcxyzpqrrrabbxyyyypqAzz
+    abxyzzpqrrrabbxyyyypqAzz
+    aabxyzzzpqrrrabbxyyyypqAzz
+    aaabxyzzzzpqrrrabbxyyyypqAzz
+    aaaabxyzzzzpqrrrabbxyyyypqAzz
+    abcxyzzpqrrrabbxyyyypqAzz
+    aabcxyzzzpqrrrabbxyyyypqAzz
+    aaabcxyzzzzpqrrrabbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypABzz
+    aaabcxyzpqrrrabbxyyyypABBzz
+    >>>aaabxyzpqrrrabbxyyyypqAzz
+    >aaaabxyzpqrrrabbxyyyypqAzz
+    >>>>abcxyzpqrrrabbxyyyypqAzz
+    *** Failers
+    abxyzpqrrabbxyyyypqAzz
+    abxyzpqrrrrabbxyyyypqAzz
+    abxyzpqrrrabxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyypqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqqqqAzz
+
+/^(abc){1,2}zz/
+    abczz
+    abcabczz
+    *** Failers
+    zz
+    abcabcabczz
+    >>abczz
+
+/^(b+?|a){1,2}?c/
+    bc
+    bbc
+    bbbc
+    bac
+    bbac
+    aac
+    abbbbbbbbbbbc
+    bbbbbbbbbbbac
+    *** Failers
+    aaac
+    abbbbbbbbbbbac
+
+/^(b+|a){1,2}c/
+    bc
+    bbc
+    bbbc
+    bac
+    bbac
+    aac
+    abbbbbbbbbbbc
+    bbbbbbbbbbbac
+    *** Failers
+    aaac
+    abbbbbbbbbbbac
+
+/^(b+|a){1,2}?bc/
+    bbc
+
+/^(b*|ba){1,2}?bc/
+    babc
+    bbabc
+    bababc
+    *** Failers
+    bababbc
+    babababc
+
+/^(ba|b*){1,2}?bc/
+    babc
+    bbabc
+    bababc
+    *** Failers
+    bababbc
+    babababc
+
+/^\ca\cA\c[\c{\c:/
+    \x01\x01\e;z
+
+/^[ab\]cde]/
+    athing
+    bthing
+    ]thing
+    cthing
+    dthing
+    ething
+    *** Failers
+    fthing
+    [thing
+    \\thing
+
+/^[]cde]/
+    ]thing
+    cthing
+    dthing
+    ething
+    *** Failers
+    athing
+    fthing
+
+/^[^ab\]cde]/
+    fthing
+    [thing
+    \\thing
+    *** Failers
+    athing
+    bthing
+    ]thing
+    cthing
+    dthing
+    ething
+
+/^[^]cde]/
+    athing
+    fthing
+    *** Failers
+    ]thing
+    cthing
+    dthing
+    ething
+
+/^\�/
+    �
+
+/^�/
+    �
+
+/^[0-9]+$/
+    0
+    1
+    2
+    3
+    4
+    5
+    6
+    7
+    8
+    9
+    10
+    100
+    *** Failers
+    abc
+
+/^.*nter/
+    enter
+    inter
+    uponter
+
+/^xxx[0-9]+$/
+    xxx0
+    xxx1234
+    *** Failers
+    xxx
+
+/^.+[0-9][0-9][0-9]$/
+    x123
+    xx123
+    123456
+    *** Failers
+    123
+    x1234
+
+/^.+?[0-9][0-9][0-9]$/
+    x123
+    xx123
+    123456
+    *** Failers
+    123
+    x1234
+
+/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
+    abc!pqr=apquxz.ixr.zzz.ac.uk
+    *** Failers
+    !pqr=apquxz.ixr.zzz.ac.uk
+    abc!=apquxz.ixr.zzz.ac.uk
+    abc!pqr=apquxz:ixr.zzz.ac.uk
+    abc!pqr=apquxz.ixr.zzz.ac.ukk
+
+/:/
+    Well, we need a colon: somewhere
+    *** Fail if we don't
+
+/([\da-f:]+)$/i
+    0abc
+    abc
+    fed
+    E
+    ::
+    5f03:12C0::932e
+    fed def
+    Any old stuff
+    *** Failers
+    0zzz
+    gzzz
+    fed\x20
+    Any old rubbish
+
+/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
+    .1.2.3
+    A.12.123.0
+    *** Failers
+    .1.2.3333
+    1.2.3
+    1234.2.3
+
+/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
+    1 IN SOA non-sp1 non-sp2(
+    1    IN    SOA    non-sp1    non-sp2   (
+    *** Failers
+    1IN SOA non-sp1 non-sp2(
+
+/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
+    a.
+    Z.
+    2.
+    ab-c.pq-r.
+    sxk.zzz.ac.uk.
+    x-.y-.
+    *** Failers
+    -abc.peq.
+
+/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
+    *.a
+    *.b0-a
+    *.c3-b.c
+    *.c-a.b-c
+    *** Failers
+    *.0
+    *.a-
+    *.a-b.c-
+    *.c-a.0-c
+
+/^(?=ab(de))(abd)(e)/
+    abde
+
+/^(?!(ab)de|x)(abd)(f)/
+    abdf
+
+/^(?=(ab(cd)))(ab)/
+    abcd
+
+/^[\da-f](\.[\da-f])*$/i
+    a.b.c.d
+    A.B.C.D
+    a.b.c.1.2.3.C
+
+/^\".*\"\s*(;.*)?$/
+    \"1234\"
+    \"abcd\" ;
+    \"\" ; rhubarb
+    *** Failers
+    \"1234\" : things
+
+/^$/
+    \
+    *** Failers
+
+/   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/x
+    ab c
+    *** Failers
+    abc
+    ab cde
+
+/(?x)   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/
+    ab c
+    *** Failers
+    abc
+    ab cde
+
+/^   a\ b[c ]d       $/x
+    a bcd
+    a b d
+    *** Failers
+    abcd
+    ab d
+
+/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
+    abcdefhijklm
+
+/^(?:a(b(c)))(?:d(e(f)))(?:h(i(j)))(?:k(l(m)))$/
+    abcdefhijklm
+
+/^[\w][\W][\s][\S][\d][\D][\b][\n][\c]][\022]/
+    a+ Z0+\x08\n\x1d\x12
+
+/^[.^$|()*+?{,}]+/
+    .^\$(*+)|{?,?}
+
+/^a*\w/
+    z
+    az
+    aaaz
+    a
+    aa
+    aaaa
+    a+
+    aa+
+
+/^a*?\w/
+    z
+    az
+    aaaz
+    a
+    aa
+    aaaa
+    a+
+    aa+
+
+/^a+\w/
+    az
+    aaaz
+    aa
+    aaaa
+    aa+
+
+/^a+?\w/
+    az
+    aaaz
+    aa
+    aaaa
+    aa+
+
+/^\d{8}\w{2,}/
+    1234567890
+    12345678ab
+    12345678__
+    *** Failers
+    1234567
+
+/^[aeiou\d]{4,5}$/
+    uoie
+    1234
+    12345
+    aaaaa
+    *** Failers
+    123456
+
+/^[aeiou\d]{4,5}?/
+    uoie
+    1234
+    12345
+    aaaaa
+    123456
+
+/\A(abc|def)=(\1){2,3}\Z/
+    abc=abcabc
+    def=defdefdef
+    *** Failers
+    abc=defdef
+
+/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
+    abcdefghijkcda2
+    abcdefghijkkkkcda2
+
+/(cat(a(ract|tonic)|erpillar)) \1()2(3)/
+    cataract cataract23
+    catatonic catatonic23
+    caterpillar caterpillar23
+
+
+/^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/
+    From abcd  Mon Sep 01 12:33:02 1997
+
+/^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
+    From abcd  Mon Sep 01 12:33:02 1997
+    From abcd  Mon Sep  1 12:33:02 1997
+    *** Failers
+    From abcd  Sep 01 12:33:02 1997
+
+/^12.34/s
+    12\n34
+    12\r34
+
+/\w+(?=\t)/
+    the quick brown\t fox
+
+/foo(?!bar)(.*)/
+    foobar is foolish see?
+
+/(?:(?!foo)...|^.{0,2})bar(.*)/
+    foobar crowbar etc
+    barrel
+    2barrel
+    A barrel
+
+/^(\D*)(?=\d)(?!123)/
+    abc456
+    *** Failers
+    abc123
+
+/^1234(?# test newlines
+  inside)/
+    1234
+
+/^1234 #comment in extended re
+  /x
+    1234
+
+/#rhubarb
+  abcd/x
+    abcd
+
+/^abcd#rhubarb/x
+    abcd
+
+/^(a)\1{2,3}(.)/
+    aaab
+    aaaab
+    aaaaab
+    aaaaaab
+
+/(?!^)abc/
+    the abc
+    *** Failers
+    abc
+
+/(?=^)abc/
+    abc
+    *** Failers
+    the abc
+
+/^[ab]{1,3}(ab*|b)/
+    aabbbbb
+
+/^[ab]{1,3}?(ab*|b)/
+    aabbbbb
+
+/^[ab]{1,3}?(ab*?|b)/
+    aabbbbb
+
+/^[ab]{1,3}(ab*?|b)/
+    aabbbbb
+
+/  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                          # optional leading comment
+(?:    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)                    # initial word
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)  )* # further okay, if led by a period
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+# address
+|                     #  or
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)             # one word, optionally followed by....
+(?:
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037]  |  # atom and space parts, or...
+\(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)       |  # comments, or...
+
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+# quoted strings
+)*
+<  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                     # leading <
+(?:  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  ,  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+)* # further okay, if led by comma
+:                                # closing colon
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  )? #       optional route
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)                    # initial word
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)  )* # further okay, if led by a period
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+#       address spec
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  > #                  trailing >
+# name and address
+)  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                       # optional trailing comment
+/x
+    Alan Other <user\@dom.ain>
+    <user\@dom.ain>
+    user\@dom.ain
+    \"A. Other\" <user.1234\@dom.ain> (a comment)
+    A. Other <user.1234\@dom.ain> (a comment)
+    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+    A missing angle <user\@some.where
+    *** Failers
+    The quick brown fox
+
+/[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional leading comment
+(?:
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# additional words
+)*
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+# address
+|                             #  or
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+# leading word
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *               # "normal" atoms and or spaces
+(?:
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+|
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+) # "special" comment or quoted string
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *            #  more "normal"
+)*
+<
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# <
+(?:
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+(?: ,
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+)*  # additional domains
+:
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)?     #       optional route
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# additional words
+)*
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+#       address spec
+>                    #                 >
+# name and address
+)
+/x
+    Alan Other <user\@dom.ain>
+    <user\@dom.ain>
+    user\@dom.ain
+    \"A. Other\" <user.1234\@dom.ain> (a comment)
+    A. Other <user.1234\@dom.ain> (a comment)
+    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+    A missing angle <user\@some.where
+    *** Failers
+    The quick brown fox
+
+/abc\0def\00pqr\000xyz\0000AB/
+    abc\0def\00pqr\000xyz\0000AB
+    abc456 abc\0def\00pqr\000xyz\0000ABCDE
+
+/abc\x0def\x00pqr\x000xyz\x0000AB/
+    abc\x0def\x00pqr\x000xyz\x0000AB
+    abc456 abc\x0def\x00pqr\x000xyz\x0000ABCDE
+
+/^[\000-\037]/
+    \0A
+    \01B
+    \037C
+
+/\0*/
+    \0\0\0\0
+
+/A\x0{2,3}Z/
+    The A\x0\x0Z
+    An A\0\x0\0Z
+    *** Failers
+    A\0Z
+    A\0\x0\0\x0Z
+
+/^(cow|)\1(bell)/
+    cowcowbell
+    bell
+    *** Failers
+    cowbell
+
+/^\s/
+    \040abc
+    \x0cabc
+    \nabc
+    \rabc
+    \tabc
+    *** Failers
+    abc
+
+/^a	b
+  
    c/x
+    abc
+
+/^(a|)\1*b/
+    ab
+    aaaab
+    b
+    *** Failers
+    acb
+
+/^(a|)\1+b/
+    aab
+    aaaab
+    b
+    *** Failers
+    ab
+
+/^(a|)\1?b/
+    ab
+    aab
+    b
+    *** Failers
+    acb
+
+/^(a|)\1{2}b/
+    aaab
+    b
+    *** Failers
+    ab
+    aab
+    aaaab
+
+/^(a|)\1{2,3}b/
+    aaab
+    aaaab
+    b
+    *** Failers
+    ab
+    aab
+    aaaaab
+
+/ab{1,3}bc/
+    abbbbc
+    abbbc
+    abbc
+    *** Failers
+    abc
+    abbbbbc
+
+/([^.]*)\.([^:]*):[T ]+(.*)/
+    track1.title:TBlah blah blah
+
+/([^.]*)\.([^:]*):[T ]+(.*)/i
+    track1.title:TBlah blah blah
+
+/([^.]*)\.([^:]*):[t ]+(.*)/i
+    track1.title:TBlah blah blah
+
+/^[W-c]+$/
+    WXY_^abc
+    *** Failers
+    wxy
+
+/^[W-c]+$/i
+    WXY_^abc
+    wxy_^ABC
+
+/^[\x3f-\x5F]+$/i
+    WXY_^abc
+    wxy_^ABC
+
+/^abc$/m
+    abc
+    qqq\nabc
+    abc\nzzz
+    qqq\nabc\nzzz
+
+/^abc$/
+    abc
+    *** Failers
+    qqq\nabc
+    abc\nzzz
+    qqq\nabc\nzzz
+
+/\Aabc\Z/m
+    abc
+    abc\n 
+    *** Failers
+    qqq\nabc
+    abc\nzzz
+    qqq\nabc\nzzz
+    
+/\A(.)*\Z/s
+    abc\ndef
+
+/\A(.)*\Z/m
+    *** Failers
+    abc\ndef
+
+/(?:b)|(?::+)/
+    b::c
+    c::b
+
+/[-az]+/
+    az-
+    *** Failers
+    b
+
+/[az-]+/
+    za-
+    *** Failers
+    b
+
+/[a\-z]+/
+    a-z
+    *** Failers
+    b
+
+/[a-z]+/
+    abcdxyz
+
+/[\d-]+/
+    12-34
+    *** Failers
+    aaa
+
+/[\d-z]+/
+    12-34z
+    *** Failers
+    aaa
+
+/\x5c/
+    \\
+
+/\x20Z/
+    the Zoo
+    *** Failers
+    Zulu
+
+/(abc)\1/i
+    abcabc
+    ABCabc
+    abcABC
+
+/ab{3cd/
+    ab{3cd
+
+/ab{3,cd/
+    ab{3,cd
+
+/ab{3,4a}cd/
+    ab{3,4a}cd
+
+/{4,5a}bc/
+    {4,5a}bc
+
+/^a.b/
+    a\rb
+    *** Failers
+    a\nb
+
+/abc$/
+    abc
+    abc\n
+    *** Failers
+    abc\ndef
+
+/(abc)\123/
+    abc\x53
+
+/(abc)\223/
+    abc\x93
+
+/(abc)\323/
+    abc\xd3
+
+/(abc)\500/
+    abc\x40
+    abc\100
+
+/(abc)\5000/
+    abc\x400
+    abc\x40\x30
+    abc\1000
+    abc\100\x30
+    abc\100\060
+    abc\100\60
+
+/abc\81/
+    abc\081
+    abc\0\x38\x31
+
+/abc\91/
+    abc\091
+    abc\0\x39\x31
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\12\123/
+    abcdefghijkllS
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\12\123/
+    abcdefghijk\12S
+
+/ab\gdef/
+    abgdef
+
+/a{0}bc/
+    bc
+
+/(a|(bc)){0,0}?xyz/
+    xyz
+
+/abc[\10]de/
+    abc\010de
+
+/abc[\1]de/
+    abc\1de
+
+/(abc)[\1]de/
+    abc\1de
+
+/(?s)a.b/
+    a\nb
+
+/^([^a])([^\b])([^c]*)([^d]{3,4})/
+    baNOTccccd
+    baNOTcccd
+    baNOTccd
+    bacccd
+    *** Failers
+    anything
+    b\bc   
+    baccd
+
+/[^a]/
+    Abc
+  
+/[^a]/i
+    Abc 
+
+/[^a]+/
+    AAAaAbc
+  
+/[^a]+/i
+    AAAaAbc 
+
+/[^a]+/
+    bbb\nccc
+   
+/[^k]$/
+    abc
+    *** Failers
+    abk   
+   
+/[^k]{2,3}$/
+    abc
+    kbc
+    kabc 
+    *** Failers
+    abk
+    akb
+    akk 
+
+/^\d{8,}\@.+[^k]$/
+    12345678\@a.b.c.d
+    123456789\@x.y.z
+    *** Failers
+    12345678\@x.y.uk
+    1234567\@a.b.c.d       
+
+/(a)\1{8,}/
+    aaaaaaaaa
+    aaaaaaaaaa
+    *** Failers
+    aaaaaaa   
+
+/[^a]/
+    aaaabcd
+    aaAabcd 
+
+/[^a]/i
+    aaaabcd
+    aaAabcd 
+
+/[^az]/
+    aaaabcd
+    aaAabcd 
+
+/[^az]/i
+    aaaabcd
+    aaAabcd 
+
+/\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377/
+ \000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377
+
+/P[^*]TAIRE[^*]{1,6}?LL/
+    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+
+/P[^*]TAIRE[^*]{1,}?LL/
+    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+
+/(\.\d\d[1-9]?)\d+/
+    1.230003938
+    1.875000282   
+    1.235  
+                  
+/(\.\d\d((?=0)|\d(?=\d)))/
+    1.230003938      
+    1.875000282
+    *** Failers 
+    1.235 
+    
+/a(?)b/
+    ab 
+ 
+/\b(foo)\s+(\w+)/i
+    Food is on the foo table
+    
+/foo(.*)bar/
+    The food is under the bar in the barn.
+    
+/foo(.*?)bar/  
+    The food is under the bar in the barn.
+
+/(.*)(\d*)/
+    I have 2 numbers: 53147
+    
+/(.*)(\d+)/
+    I have 2 numbers: 53147
+ 
+/(.*?)(\d*)/
+    I have 2 numbers: 53147
+
+/(.*?)(\d+)/
+    I have 2 numbers: 53147
+
+/(.*)(\d+)$/
+    I have 2 numbers: 53147
+
+/(.*?)(\d+)$/
+    I have 2 numbers: 53147
+
+/(.*)\b(\d+)$/
+    I have 2 numbers: 53147
+
+/(.*\D)(\d+)$/
+    I have 2 numbers: 53147
+
+/^\D*(?!123)/
+    ABC123
+     
+/^(\D*)(?=\d)(?!123)/
+    ABC445
+    *** Failers
+    ABC123
+    
+/^[W-]46]/
+    W46]789 
+    -46]789
+    *** Failers
+    Wall
+    Zebra
+    42
+    [abcd] 
+    ]abcd[
+       
+/^[W-\]46]/
+    W46]789 
+    Wall
+    Zebra
+    Xylophone  
+    42
+    [abcd] 
+    ]abcd[
+    \\backslash 
+    *** Failers
+    -46]789
+    well
+    
+/\d\d\/\d\d\/\d\d\d\d/
+    01/01/2000
+
+/word (?:[a-zA-Z0-9]+ ){0,10}otherword/
+  word cat dog elephant mussel cow horse canary baboon snake shark otherword
+  word cat dog elephant mussel cow horse canary baboon snake shark
+
+/word (?:[a-zA-Z0-9]+ ){0,300}otherword/
+  word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
+
+/^(a){0,0}/
+    bcd
+    abc
+    aab     
+
+/^(a){0,1}/
+    bcd
+    abc
+    aab  
+
+/^(a){0,2}/
+    bcd
+    abc
+    aab  
+
+/^(a){0,3}/
+    bcd
+    abc
+    aab
+    aaa   
+
+/^(a){0,}/
+    bcd
+    abc
+    aab
+    aaa
+    aaaaaaaa    
+
+/^(a){1,1}/
+    bcd
+    abc
+    aab  
+
+/^(a){1,2}/
+    bcd
+    abc
+    aab  
+
+/^(a){1,3}/
+    bcd
+    abc
+    aab
+    aaa   
+
+/^(a){1,}/
+    bcd
+    abc
+    aab
+    aaa
+    aaaaaaaa    
+
+/.*\.gif/
+    borfle\nbib.gif\nno
+
+/.{0,}\.gif/
+    borfle\nbib.gif\nno
+
+/.*\.gif/m
+    borfle\nbib.gif\nno
+
+/.*\.gif/s
+    borfle\nbib.gif\nno
+
+/.*\.gif/ms
+    borfle\nbib.gif\nno
+    
+/.*$/
+    borfle\nbib.gif\nno
+
+/.*$/m
+    borfle\nbib.gif\nno
+
+/.*$/s
+    borfle\nbib.gif\nno
+
+/.*$/ms
+    borfle\nbib.gif\nno
+    
+/.*$/
+    borfle\nbib.gif\nno\n
+
+/.*$/m
+    borfle\nbib.gif\nno\n
+
+/.*$/s
+    borfle\nbib.gif\nno\n
+
+/.*$/ms
+    borfle\nbib.gif\nno\n
+    
+/(.*X|^B)/
+    abcde\n1234Xyz
+    BarFoo 
+    *** Failers
+    abcde\nBar  
+
+/(.*X|^B)/m
+    abcde\n1234Xyz
+    BarFoo 
+    abcde\nBar  
+
+/(.*X|^B)/s
+    abcde\n1234Xyz
+    BarFoo 
+    *** Failers
+    abcde\nBar  
+
+/(.*X|^B)/ms
+    abcde\n1234Xyz
+    BarFoo 
+    abcde\nBar  
+
+/(?s)(.*X|^B)/
+    abcde\n1234Xyz
+    BarFoo 
+    *** Failers 
+    abcde\nBar  
+
+/(?s:.*X|^B)/
+    abcde\n1234Xyz
+    BarFoo 
+    *** Failers 
+    abcde\nBar  
+
+/^.*B/
+    **** Failers
+    abc\nB
+     
+/(?s)^.*B/
+    abc\nB
+
+/(?m)^.*B/
+    abc\nB
+     
+/(?ms)^.*B/
+    abc\nB
+
+/(?ms)^B/
+    abc\nB
+
+/(?s)B$/
+    B\n
+
+/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]/
+    123456654321
+  
+/^\d\d\d\d\d\d\d\d\d\d\d\d/
+    123456654321 
+
+/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
+    123456654321
+  
+/^[abc]{12}/
+    abcabcabcabc
+    
+/^[a-c]{12}/
+    abcabcabcabc
+    
+/^(a|b|c){12}/
+    abcabcabcabc 
+
+/^[abcdefghijklmnopqrstuvwxy0123456789]/
+    n
+    *** Failers 
+    z 
+
+/abcde{0,0}/
+    abcd
+    *** Failers
+    abce  
+
+/ab[cd]{0,0}e/
+    abe
+    *** Failers
+    abcde 
+    
+/ab(c){0,0}d/
+    abd
+    *** Failers
+    abcd   
+
+/a(b*)/
+    a
+    ab
+    abbbb
+    *** Failers
+    bbbbb    
+    
+/ab\d{0}e/
+    abe
+    *** Failers
+    ab1e   
+    
+/"([^\\"]+|\\.)*"/
+    the \"quick\" brown fox
+    \"the \\\"quick\\\" brown fox\" 
+
+/.*?/g+
+    abc
+  
+/\b/g+
+    abc 
+
+/\b/+g
+    abc 
+
+//g
+    abc
+
+/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
+  <TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>
+
+/a[^a]b/
+    acb
+    a\nb
+    
+/a.b/
+    acb
+    *** Failers 
+    a\nb   
+    
+/a[^a]b/s
+    acb
+    a\nb  
+    
+/a.b/s
+    acb
+    a\nb  
+
+/^(b+?|a){1,2}?c/
+    bac
+    bbac
+    bbbac
+    bbbbac
+    bbbbbac 
+
+/^(b+|a){1,2}?c/
+    bac
+    bbac
+    bbbac
+    bbbbac
+    bbbbbac 
+    
+/(?!\A)x/m
+    x\nb\n
+    a\bx\n  
+    
+/\x0{ab}/
+    \0{ab} 
+
+/(A|B)*?CD/
+    CD 
+    
+/(A|B)*CD/
+    CD 
+
+/(AB)*?\1/
+    ABABAB
+
+/(AB)*\1/
+    ABABAB
+    
+/(?<!bar)foo/
+    foo
+    catfood
+    arfootle
+    rfoosh
+    *** Failers
+    barfoo
+    towbarfoo
+
+/\w{3}(?<!bar)foo/
+    catfood
+    *** Failers
+    foo
+    barfoo
+    towbarfoo
+
+/(?<=(foo)a)bar/
+    fooabar
+    *** Failers
+    bar
+    foobbar
+      
+/\Aabc\z/m
+    abc
+    *** Failers
+    abc\n   
+    qqq\nabc
+    abc\nzzz
+    qqq\nabc\nzzz
+
+"(?>.*/)foo"
+    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/
+
+"(?>.*/)foo"
+    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
+
+/(?>(\.\d\d[1-9]?))\d+/
+    1.230003938
+    1.875000282
+    *** Failers 
+    1.235 
+
+/^((?>\w+)|(?>\s+))*$/
+    now is the time for all good men to come to the aid of the party
+    *** Failers
+    this is not a line with only words and spaces!
+    
+/(\d+)(\w)/
+    12345a
+    12345+ 
+
+/((?>\d+))(\w)/
+    12345a
+    *** Failers
+    12345+ 
+
+/(?>a+)b/
+    aaab
+
+/((?>a+)b)/
+    aaab
+
+/(?>(a+))b/
+    aaab
+
+/(?>b)+/
+    aaabbbccc
+
+/(?>a+|b+|c+)*c/
+    aaabbbbccccd
+
+/((?>[^()]+)|\([^()]*\))+/
+    ((abc(ade)ufh()()x
+    
+/\(((?>[^()]+)|\([^()]+\))+\)/ 
+    (abc)
+    (abc(def)xyz)
+    *** Failers
+    ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa   
+
+/a(?-i)b/i
+    ab
+    Ab
+    *** Failers 
+    aB
+    AB
+        
+/(a (?x)b c)d e/
+    a bcd e
+    *** Failers
+    a b cd e
+    abcd e   
+    a bcde 
+ 
+/(a b(?x)c d (?-x)e f)/
+    a bcde f
+    *** Failers
+    abcdef  
+
+/(a(?i)b)c/
+    abc
+    aBc
+    *** Failers
+    abC
+    aBC  
+    Abc
+    ABc
+    ABC
+    AbC
+    
+/a(?i:b)c/
+    abc
+    aBc
+    *** Failers 
+    ABC
+    abC
+    aBC
+    
+/a(?i:b)*c/
+    aBc
+    aBBc
+    *** Failers 
+    aBC
+    aBBC
+    
+/a(?=b(?i)c)\w\wd/
+    abcd
+    abCd
+    *** Failers
+    aBCd
+    abcD     
+    
+/(?s-i:more.*than).*million/i
+    more than million
+    more than MILLION
+    more \n than Million 
+    *** Failers
+    MORE THAN MILLION    
+    more \n than \n million 
+
+/(?:(?s-i)more.*than).*million/i
+    more than million
+    more than MILLION
+    more \n than Million 
+    *** Failers
+    MORE THAN MILLION    
+    more \n than \n million 
+    
+/(?>a(?i)b+)+c/ 
+    abc
+    aBbc
+    aBBc 
+    *** Failers
+    Abc
+    abAb    
+    abbC 
+    
+/(?=a(?i)b)\w\wc/
+    abc
+    aBc
+    *** Failers
+    Ab 
+    abC
+    aBC     
+    
+/(?<=a(?i)b)(\w\w)c/
+    abxxc
+    aBxxc
+    *** Failers
+    Abxxc
+    ABxxc
+    abxxC      
+
+/(?:(a)|b)(?(1)A|B)/
+    aA
+    bB
+    *** Failers
+    aB
+    bA    
+
+/^(a)?(?(1)a|b)+$/
+    aa
+    b
+    bb  
+    *** Failers
+    ab   
+
+/^(?(?=abc)\w{3}:|\d\d)$/
+    abc:
+    12
+    *** Failers
+    123
+    xyz    
+
+/^(?(?!abc)\d\d|\w{3}:)$/
+    abc:
+    12
+    *** Failers
+    123
+    xyz    
+    
+/(?(?<=foo)bar|cat)/
+    foobar
+    cat
+    fcat
+    focat   
+    *** Failers
+    foocat  
+
+/(?(?<!foo)cat|bar)/
+    foobar
+    cat
+    fcat
+    focat   
+    *** Failers
+    foocat  
+
+/( \( )? [^()]+ (?(1) \) |) /x
+    abcd
+    (abcd)
+    the quick (abcd) fox
+    (abcd   
+
+/( \( )? [^()]+ (?(1) \) ) /x
+    abcd
+    (abcd)
+    the quick (abcd) fox
+    (abcd   
+
+/^(?(2)a|(1)(2))+$/
+    12
+    12a
+    12aa
+    *** Failers
+    1234    
+
+/((?i)blah)\s+\1/
+    blah blah
+    BLAH BLAH
+    Blah Blah
+    blaH blaH
+    *** Failers
+    blah BLAH
+    Blah blah      
+    blaH blah 
+
+/((?i)blah)\s+(?i:\1)/
+    blah blah
+    BLAH BLAH
+    Blah Blah
+    blaH blaH
+    blah BLAH
+    Blah blah      
+    blaH blah 
+
+/(?>a*)*/
+    a
+    aa
+    aaaa
+    
+/(abc|)+/
+    abc
+    abcabc
+    abcabcabc
+    xyz      
+
+/([a]*)*/
+    a
+    aaaaa 
+ 
+/([ab]*)*/
+    a
+    b
+    ababab
+    aaaabcde
+    bbbb    
+ 
+/([^a]*)*/
+    b
+    bbbb
+    aaa   
+ 
+/([^ab]*)*/
+    cccc
+    abab  
+ 
+/([a]*?)*/
+    a
+    aaaa 
+ 
+/([ab]*?)*/
+    a
+    b
+    abab
+    baba   
+ 
+/([^a]*?)*/
+    b
+    bbbb
+    aaa   
+ 
+/([^ab]*?)*/
+    c
+    cccc
+    baba   
+ 
+/(?>a*)*/
+    a
+    aaabcde 
+ 
+/((?>a*))*/
+    aaaaa
+    aabbaa 
+ 
+/((?>a*?))*/
+    aaaaa
+    aabbaa 
+
+/(?(?=[^a-z]+[a-z])  \d{2}-[a-z]{3}-\d{2}  |  \d{2}-\d{2}-\d{2} ) /x
+    12-sep-98
+    12-09-98
+    *** Failers
+    sep-12-98
+        
+/(?<=(foo))bar\1/
+    foobarfoo
+    foobarfootling 
+    *** Failers
+    foobar
+    barfoo   
+
+/(?i:saturday|sunday)/
+    saturday
+    sunday
+    Saturday
+    Sunday
+    SATURDAY
+    SUNDAY
+    SunDay
+    
+/(a(?i)bc|BB)x/
+    abcx
+    aBCx
+    bbx
+    BBx
+    *** Failers
+    abcX
+    aBCX
+    bbX
+    BBX               
+
+/^([ab](?i)[cd]|[ef])/
+    ac
+    aC
+    bD
+    elephant
+    Europe 
+    frog
+    France
+    *** Failers
+    Africa     
+
+/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
+    ab
+    aBd
+    xy
+    xY
+    zebra
+    Zambesi
+    *** Failers
+    aCD  
+    XY  
+
+/(?<=foo\n)^bar/m
+    foo\nbar
+    *** Failers
+    bar
+    baz\nbar   
+
+/(?<=(?<!foo)bar)baz/
+    barbaz
+    barbarbaz 
+    koobarbaz 
+    *** Failers
+    baz
+    foobarbaz 
+
+/The case of aaaaaa is missed out below because I think Perl 5.005_02 gets/
+/it wrong; it sets $1 to aaa rather than aa. Compare the following test,/
+/where it does set $1 to aa when matching aaaaaa./
+
+/^(a\1?){4}$/
+    a
+    aa
+    aaa
+    aaaa
+    aaaaa
+    aaaaaaa
+    aaaaaaaa
+    aaaaaaaaa
+    aaaaaaaaaa
+    aaaaaaaaaaa
+    aaaaaaaaaaaa
+    aaaaaaaaaaaaa
+    aaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaa               
+
+/^(a\1?)(a\1?)(a\2?)(a\3?)$/
+    a
+    aa
+    aaa
+    aaaa
+    aaaaa
+    aaaaaa
+    aaaaaaa
+    aaaaaaaa
+    aaaaaaaaa
+    aaaaaaaaaa
+    aaaaaaaaaaa
+    aaaaaaaaaaaa
+    aaaaaaaaaaaaa
+    aaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaa               
+
+/The following tests are taken from the Perl 5.005 test suite; some of them/
+/are compatible with 5.004, but I'd rather not have to sort them out./
+
+/abc/
+    abc
+    xabcy
+    ababc
+    *** Failers
+    xbc
+    axc
+    abx
+
+/ab*c/
+    abc
+
+/ab*bc/
+    abc
+    abbc
+    abbbbc
+
+/.{1}/
+    abbbbc
+
+/.{3,4}/
+    abbbbc
+
+/ab{0,}bc/
+    abbbbc
+
+/ab+bc/
+    abbc
+    *** Failers
+    abc
+    abq
+
+/ab{1,}bc/
+
+/ab+bc/
+    abbbbc
+
+/ab{1,}bc/
+    abbbbc
+
+/ab{1,3}bc/
+    abbbbc
+
+/ab{3,4}bc/
+    abbbbc
+
+/ab{4,5}bc/
+    *** Failers
+    abq
+    abbbbc
+
+/ab?bc/
+    abbc
+    abc
+
+/ab{0,1}bc/
+    abc
+
+/ab?bc/
+
+/ab?c/
+    abc
+
+/ab{0,1}c/
+    abc
+
+/^abc$/
+    abc
+    *** Failers
+    abbbbc
+    abcc
+
+/^abc/
+    abcc
+
+/^abc$/
+
+/abc$/
+    aabc
+    *** Failers
+    aabc
+    aabcd
+
+/^/
+    abc
+
+/$/
+    abc
+
+/a.c/
+    abc
+    axc
+
+/a.*c/
+    axyzc
+
+/a[bc]d/
+    abd
+    *** Failers
+    axyzd
+    abc
+
+/a[b-d]e/
+    ace
+
+/a[b-d]/
+    aac
+
+/a[-b]/
+    a-
+
+/a[b-]/
+    a-
+
+/a]/
+    a]
+
+/a[]]b/
+    a]b
+
+/a[^bc]d/
+    aed
+    *** Failers
+    abd
+    abd
+
+/a[^-b]c/
+    adc
+
+/a[^]b]c/
+    adc
+    *** Failers
+    a-c
+    a]c
+
+/\ba\b/
+    a-
+    -a
+    -a-
+
+/\by\b/
+    *** Failers
+    xy
+    yz
+    xyz
+
+/\Ba\B/
+    *** Failers
+    a-
+    -a
+    -a-
+
+/\By\b/
+    xy
+
+/\by\B/
+    yz
+
+/\By\B/
+    xyz
+
+/\w/
+    a
+
+/\W/
+    -
+    *** Failers
+    -
+    a
+
+/a\sb/
+    a b
+
+/a\Sb/
+    a-b
+    *** Failers
+    a-b
+    a b
+
+/\d/
+    1
+
+/\D/
+    -
+    *** Failers
+    -
+    1
+
+/[\w]/
+    a
+
+/[\W]/
+    -
+    *** Failers
+    -
+    a
+
+/a[\s]b/
+    a b
+
+/a[\S]b/
+    a-b
+    *** Failers
+    a-b
+    a b
+
+/[\d]/
+    1
+
+/[\D]/
+    -
+    *** Failers
+    -
+    1
+
+/ab|cd/
+    abc
+    abcd
+
+/()ef/
+    def
+
+/$b/
+
+/a\(b/
+    a(b
+
+/a\(*b/
+    ab
+    a((b
+
+/a\\b/
+    a\b
+
+/((a))/
+    abc
+
+/(a)b(c)/
+    abc
+
+/a+b+c/
+    aabbabc
+
+/a{1,}b{1,}c/
+    aabbabc
+
+/a.+?c/
+    abcabc
+
+/(a+|b)*/
+    ab
+
+/(a+|b){0,}/
+    ab
+
+/(a+|b)+/
+    ab
+
+/(a+|b){1,}/
+    ab
+
+/(a+|b)?/
+    ab
+
+/(a+|b){0,1}/
+    ab
+
+/[^ab]*/
+    cde
+
+/abc/
+    *** Failers
+    b
+    
+
+/a*/
+    
+
+/([abc])*d/
+    abbbcd
+
+/([abc])*bcd/
+    abcd
+
+/a|b|c|d|e/
+    e
+
+/(a|b|c|d|e)f/
+    ef
+
+/abcd*efg/
+    abcdefg
+
+/ab*/
+    xabyabbbz
+    xayabbbz
+
+/(ab|cd)e/
+    abcde
+
+/[abhgefdc]ij/
+    hij
+
+/^(ab|cd)e/
+
+/(abc|)ef/
+    abcdef
+
+/(a|b)c*d/
+    abcd
+
+/(ab|ab*)bc/
+    abc
+
+/a([bc]*)c*/
+    abc
+
+/a([bc]*)(c*d)/
+    abcd
+
+/a([bc]+)(c*d)/
+    abcd
+
+/a([bc]*)(c+d)/
+    abcd
+
+/a[bcd]*dcdcde/
+    adcdcde
+
+/a[bcd]+dcdcde/
+    *** Failers
+    abcde
+    adcdcde
+
+/(ab|a)b*c/
+    abc
+
+/((a)(b)c)(d)/
+    abcd
+
+/[a-zA-Z_][a-zA-Z0-9_]*/
+    alpha
+
+/^a(bc+|b[eh])g|.h$/
+    abh
+
+/(bc+d$|ef*g.|h?i(j|k))/
+    effgz
+    ij
+    reffgz
+    *** Failers
+    effg
+    bcdd
+
+/((((((((((a))))))))))/
+    a
+
+/((((((((((a))))))))))\10/
+    aa
+
+/(((((((((a)))))))))/
+    a
+
+/multiple words of text/
+    *** Failers
+    aa
+    uh-uh
+
+/multiple words/
+    multiple words, yeah
+
+/(.*)c(.*)/
+    abcde
+
+/\((.*), (.*)\)/
+    (a, b)
+
+/[k]/
+
+/abcd/
+    abcd
+
+/a(bc)d/
+    abcd
+
+/a[-]?c/
+    ac
+
+/(abc)\1/
+    abcabc
+
+/([a-c]*)\1/
+    abcabc
+
+/(a)|\1/
+    a
+    *** Failers
+    ab
+    x
+
+/(([a-c])b*?\2)*/
+    ababbbcbc
+
+/(([a-c])b*?\2){3}/
+    ababbbcbc
+
+/((\3|b)\2(a)x)+/
+    aaaxabaxbaaxbbax
+
+/((\3|b)\2(a)){2,}/
+    bbaababbabaaaaabbaaaabba
+
+/abc/i
+    ABC
+    XABCY
+    ABABC
+    *** Failers
+    aaxabxbaxbbx
+    XBC
+    AXC
+    ABX
+
+/ab*c/i
+    ABC
+
+/ab*bc/i
+    ABC
+    ABBC
+
+/ab*?bc/i
+    ABBBBC
+
+/ab{0,}?bc/i
+    ABBBBC
+
+/ab+?bc/i
+    ABBC
+
+/ab+bc/i
+    *** Failers
+    ABC
+    ABQ
+
+/ab{1,}bc/i
+
+/ab+bc/i
+    ABBBBC
+
+/ab{1,}?bc/i
+    ABBBBC
+
+/ab{1,3}?bc/i
+    ABBBBC
+
+/ab{3,4}?bc/i
+    ABBBBC
+
+/ab{4,5}?bc/i
+    *** Failers
+    ABQ
+    ABBBBC
+
+/ab??bc/i
+    ABBC
+    ABC
+
+/ab{0,1}?bc/i
+    ABC
+
+/ab??bc/i
+
+/ab??c/i
+    ABC
+
+/ab{0,1}?c/i
+    ABC
+
+/^abc$/i
+    ABC
+    *** Failers
+    ABBBBC
+    ABCC
+
+/^abc/i
+    ABCC
+
+/^abc$/i
+
+/abc$/i
+    AABC
+
+/^/i
+    ABC
+
+/$/i
+    ABC
+
+/a.c/i
+    ABC
+    AXC
+
+/a.*?c/i
+    AXYZC
+
+/a.*c/i
+    *** Failers
+    AABC
+    AXYZD
+
+/a[bc]d/i
+    ABD
+
+/a[b-d]e/i
+    ACE
+    *** Failers
+    ABC
+    ABD
+
+/a[b-d]/i
+    AAC
+
+/a[-b]/i
+    A-
+
+/a[b-]/i
+    A-
+
+/a]/i
+    A]
+
+/a[]]b/i
+    A]B
+
+/a[^bc]d/i
+    AED
+
+/a[^-b]c/i
+    ADC
+    *** Failers
+    ABD
+    A-C
+
+/a[^]b]c/i
+    ADC
+
+/ab|cd/i
+    ABC
+    ABCD
+
+/()ef/i
+    DEF
+
+/$b/i
+    *** Failers
+    A]C
+    B
+
+/a\(b/i
+    A(B
+
+/a\(*b/i
+    AB
+    A((B
+
+/a\\b/i
+    A\B
+
+/((a))/i
+    ABC
+
+/(a)b(c)/i
+    ABC
+
+/a+b+c/i
+    AABBABC
+
+/a{1,}b{1,}c/i
+    AABBABC
+
+/a.+?c/i
+    ABCABC
+
+/a.*?c/i
+    ABCABC
+
+/a.{0,5}?c/i
+    ABCABC
+
+/(a+|b)*/i
+    AB
+
+/(a+|b){0,}/i
+    AB
+
+/(a+|b)+/i
+    AB
+
+/(a+|b){1,}/i
+    AB
+
+/(a+|b)?/i
+    AB
+
+/(a+|b){0,1}/i
+    AB
+
+/(a+|b){0,1}?/i
+    AB
+
+/[^ab]*/i
+    CDE
+
+/abc/i
+
+/a*/i
+    
+
+/([abc])*d/i
+    ABBBCD
+
+/([abc])*bcd/i
+    ABCD
+
+/a|b|c|d|e/i
+    E
+
+/(a|b|c|d|e)f/i
+    EF
+
+/abcd*efg/i
+    ABCDEFG
+
+/ab*/i
+    XABYABBBZ
+    XAYABBBZ
+
+/(ab|cd)e/i
+    ABCDE
+
+/[abhgefdc]ij/i
+    HIJ
+
+/^(ab|cd)e/i
+    ABCDE
+
+/(abc|)ef/i
+    ABCDEF
+
+/(a|b)c*d/i
+    ABCD
+
+/(ab|ab*)bc/i
+    ABC
+
+/a([bc]*)c*/i
+    ABC
+
+/a([bc]*)(c*d)/i
+    ABCD
+
+/a([bc]+)(c*d)/i
+    ABCD
+
+/a([bc]*)(c+d)/i
+    ABCD
+
+/a[bcd]*dcdcde/i
+    ADCDCDE
+
+/a[bcd]+dcdcde/i
+
+/(ab|a)b*c/i
+    ABC
+
+/((a)(b)c)(d)/i
+    ABCD
+
+/[a-zA-Z_][a-zA-Z0-9_]*/i
+    ALPHA
+
+/^a(bc+|b[eh])g|.h$/i
+    ABH
+
+/(bc+d$|ef*g.|h?i(j|k))/i
+    EFFGZ
+    IJ
+    REFFGZ
+    *** Failers
+    ADCDCDE
+    EFFG
+    BCDD
+
+/((((((((((a))))))))))/i
+    A
+
+/((((((((((a))))))))))\10/i
+    AA
+
+/(((((((((a)))))))))/i
+    A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))/i
+    A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/i
+    C
+
+/multiple words of text/i
+    *** Failers
+    AA
+    UH-UH
+
+/multiple words/i
+    MULTIPLE WORDS, YEAH
+
+/(.*)c(.*)/i
+    ABCDE
+
+/\((.*), (.*)\)/i
+    (A, B)
+
+/[k]/i
+
+/abcd/i
+    ABCD
+
+/a(bc)d/i
+    ABCD
+
+/a[-]?c/i
+    AC
+
+/(abc)\1/i
+    ABCABC
+
+/([a-c]*)\1/i
+    ABCABC
+
+/a(?!b)./
+    abad
+
+/a(?=d)./
+    abad
+
+/a(?=c|d)./
+    abad
+
+/a(?:b|c|d)(.)/
+    ace
+
+/a(?:b|c|d)*(.)/
+    ace
+
+/a(?:b|c|d)+?(.)/
+    ace
+    acdbcdbe
+
+/a(?:b|c|d)+(.)/
+    acdbcdbe
+
+/a(?:b|c|d){2}(.)/
+    acdbcdbe
+
+/a(?:b|c|d){4,5}(.)/
+    acdbcdbe
+
+/a(?:b|c|d){4,5}?(.)/
+    acdbcdbe
+
+/((foo)|(bar))*/
+    foobar
+
+/a(?:b|c|d){6,7}(.)/
+    acdbcdbe
+
+/a(?:b|c|d){6,7}?(.)/
+    acdbcdbe
+
+/a(?:b|c|d){5,6}(.)/
+    acdbcdbe
+
+/a(?:b|c|d){5,6}?(.)/
+    acdbcdbe
+
+/a(?:b|c|d){5,7}(.)/
+    acdbcdbe
+
+/a(?:b|c|d){5,7}?(.)/
+    acdbcdbe
+
+/a(?:b|(c|e){1,2}?|d)+?(.)/
+    ace
+
+/^(.+)?B/
+    AB
+
+/^([^a-z])|(\^)$/
+    .
+
+/^[<>]&/
+    <&OUT
+
+/^(a\1?){4}$/
+    aaaaaaaaaa
+    *** Failers
+    AB
+    aaaaaaaaa
+    aaaaaaaaaaa
+
+/^(a(?(1)\1)){4}$/
+    aaaaaaaaaa
+    *** Failers
+    aaaaaaaaa
+    aaaaaaaaaaa
+
+/(?:(f)(o)(o)|(b)(a)(r))*/
+    foobar
+
+/(?<=a)b/
+    ab
+    *** Failers
+    cb
+    b
+
+/(?<!c)b/
+    ab
+    b
+    b
+
+/(?:..)*a/
+    aba
+
+/(?:..)*?a/
+    aba
+
+/^(?:b|a(?=(.)))*\1/
+    abc
+
+/^(){3,5}/
+    abc
+
+/^(a+)*ax/
+    aax
+
+/^((a|b)+)*ax/
+    aax
+
+/^((a|bc)+)*ax/
+    aax
+
+/(a|x)*ab/
+    cab
+
+/(a)*ab/
+    cab
+
+/(?:(?i)a)b/
+    ab
+
+/((?i)a)b/
+    ab
+
+/(?:(?i)a)b/
+    Ab
+
+/((?i)a)b/
+    Ab
+
+/(?:(?i)a)b/
+    *** Failers
+    cb
+    aB
+
+/((?i)a)b/
+
+/(?i:a)b/
+    ab
+
+/((?i:a))b/
+    ab
+
+/(?i:a)b/
+    Ab
+
+/((?i:a))b/
+    Ab
+
+/(?i:a)b/
+    *** Failers
+    aB
+    aB
+
+/((?i:a))b/
+
+/(?:(?-i)a)b/i
+    ab
+
+/((?-i)a)b/i
+    ab
+
+/(?:(?-i)a)b/i
+    aB
+
+/((?-i)a)b/i
+    aB
+
+/(?:(?-i)a)b/i
+    *** Failers
+    aB
+    Ab
+
+/((?-i)a)b/i
+
+/(?:(?-i)a)b/i
+    aB
+
+/((?-i)a)b/i
+    aB
+
+/(?:(?-i)a)b/i
+    *** Failers
+    Ab
+    AB
+
+/((?-i)a)b/i
+
+/(?-i:a)b/i
+    ab
+
+/((?-i:a))b/i
+    ab
+
+/(?-i:a)b/i
+    aB
+
+/((?-i:a))b/i
+    aB
+
+/(?-i:a)b/i
+    *** Failers
+    AB
+    Ab
+
+/((?-i:a))b/i
+
+/(?-i:a)b/i
+    aB
+
+/((?-i:a))b/i
+    aB
+
+/(?-i:a)b/i
+    *** Failers
+    Ab
+    AB
+
+/((?-i:a))b/i
+
+/((?-i:a.))b/i
+    *** Failers
+    AB
+    a\nB
+
+/((?s-i:a.))b/i
+    a\nB
+
+/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
+    cabbbb
+
+/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
+    caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+
+/(ab)\d\1/i
+    Ab4ab
+    ab4Ab
+
+/foo\w*\d{4}baz/
+    foobar1234baz
+
+/x(~~)*(?:(?:F)?)?/
+    x~~
+
+/^a(?#xxx){3}c/
+    aaac
+
+/^a (?#xxx) (?#yyy) {3}c/x
+    aaac
+
+/(?<![cd])b/
+    *** Failers
+    B\nB
+    dbcb
+
+/(?<![cd])[ab]/
+    dbaacb
+
+/(?<!(c|d))b/
+
+/(?<!(c|d))[ab]/
+    dbaacb
+
+/(?<!cd)[ab]/
+    cdaccb
+
+/^(?:a?b?)*$/
+    *** Failers
+    dbcb
+    a--
+
+/((?s)^a(.))((?m)^b$)/
+    a\nb\nc\n
+
+/((?m)^b$)/
+    a\nb\nc\n
+
+/(?m)^b/
+    a\nb\n
+
+/(?m)^(b)/
+    a\nb\n
+
+/((?m)^b)/
+    a\nb\n
+
+/\n((?m)^b)/
+    a\nb\n
+
+/((?s).)c(?!.)/
+    a\nb\nc\n
+    a\nb\nc\n
+
+/((?s)b.)c(?!.)/
+    a\nb\nc\n
+    a\nb\nc\n
+
+/^b/
+
+/()^b/
+    *** Failers
+    a\nb\nc\n
+    a\nb\nc\n
+
+/((?m)^b)/
+    a\nb\nc\n
+
+/(?(1)a|b)/
+
+/(?(1)b|a)/
+    a
+
+/(x)?(?(1)a|b)/
+    *** Failers
+    a
+    a
+
+/(x)?(?(1)b|a)/
+    a
+
+/()?(?(1)b|a)/
+    a
+
+/()(?(1)b|a)/
+
+/()?(?(1)a|b)/
+    a
+
+/^(\()?blah(?(1)(\)))$/
+    (blah)
+    blah
+    *** Failers
+    a
+    blah)
+    (blah
+
+/^(\(+)?blah(?(1)(\)))$/
+    (blah)
+    blah
+    *** Failers
+    blah)
+    (blah
+
+/(?(?!a)a|b)/
+
+/(?(?!a)b|a)/
+    a
+
+/(?(?=a)b|a)/
+    *** Failers
+    a
+    a
+
+/(?(?=a)a|b)/
+    a
+
+/(?=(a+?))(\1ab)/
+    aaab
+
+/^(?=(a+?))\1ab/
+
+/(\w+:)+/
+    one:
+
+/$(?<=^(a))/
+    a
+
+/(?=(a+?))(\1ab)/
+    aaab
+
+/^(?=(a+?))\1ab/
+    *** Failers
+    aaab
+    aaab
+
+/([\w:]+::)?(\w+)$/
+    abcd
+    xy:z:::abcd
+
+/^[^bcd]*(c+)/
+    aexycd
+
+/(a*)b+/
+    caab
+
+/([\w:]+::)?(\w+)$/
+    abcd
+    xy:z:::abcd
+    *** Failers
+    abcd:
+    abcd:
+
+/^[^bcd]*(c+)/
+    aexycd
+
+/(>a+)ab/
+
+/(?>a+)b/
+    aaab
+
+/([[:]+)/
+    a:[b]:
+
+/([[=]+)/
+    a=[b]=
+
+/([[.]+)/
+    a.[b].
+
+/((?>a+)b)/
+    aaab
+
+/(?>(a+))b/
+    aaab
+
+/((?>[^()]+)|\([^()]*\))+/
+    ((abc(ade)ufh()()x
+
+/a\Z/
+    *** Failers
+    aaab
+    a\nb\n
+
+/b\Z/
+    a\nb\n
+
+/b\z/
+
+/b\Z/
+    a\nb
+
+/b\z/
+    a\nb
+    *** Failers
+    
+/^(?>(?(1)\.|())[^\W_](?>[a-z0-9-]*[^\W_])?)+$/
+    a
+    abc
+    a-b
+    0-9 
+    a.b
+    5.6.7  
+    the.quick.brown.fox
+    a100.b200.300c  
+    12-ab.1245 
+    *** Failers
+    \
+    .a
+    -a
+    a-
+    a.  
+    a_b 
+    a.-
+    a..  
+    ab..bc 
+    the.quick.brown.fox-
+    the.quick.brown.fox.
+    the.quick.brown.fox_
+    the.quick.brown.fox+       
+
+/(?>.*)(?<=(abcd|wxyz))/
+    alphabetabcd
+    endingwxyz
+    *** Failers
+    a rather long string that doesn't end with one of them
+
+/word (?>(?:(?!otherword)[a-zA-Z0-9]+ ){0,30})otherword/
+    word cat dog elephant mussel cow horse canary baboon snake shark otherword
+    word cat dog elephant mussel cow horse canary baboon snake shark
+  
+/word (?>[a-zA-Z0-9]+ ){0,30}otherword/
+    word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
+
+/(?<=\d{3}(?!999))foo/
+    999foo
+    123999foo 
+    *** Failers
+    123abcfoo
+    
+/(?<=(?!...999)\d{3})foo/
+    999foo
+    123999foo 
+    *** Failers
+    123abcfoo
+
+/(?<=\d{3}(?!999)...)foo/
+    123abcfoo
+    123456foo 
+    *** Failers
+    123999foo  
+    
+/(?<=\d{3}...)(?<!999)foo/
+    123abcfoo   
+    123456foo 
+    *** Failers
+    123999foo  
+
+/<a[\s]+href[\s]*=[\s]*          # find <a href=
+ ([\"\'])?                       # find single or double quote
+ (?(1) (.*?)\1 | ([^\s]+))       # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+    <a href=\"abcd xyz pqr\" cats
+    <a href=\'abcd xyz pqr\' cats
+
+/<a\s+href\s*=\s*                # find <a href=
+ (["'])?                         # find single or double quote
+ (?(1) (.*?)\1 | (\S+))          # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+    <a href=\"abcd xyz pqr\" cats
+    <a href       =       \'abcd xyz pqr\' cats
+
+/<a\s+href(?>\s*)=(?>\s*)        # find <a href=
+ (["'])?                         # find single or double quote
+ (?(1) (.*?)\1 | (\S+))          # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+    <a href=\"abcd xyz pqr\" cats
+    <a href       =       \'abcd xyz pqr\' cats
+
+/((Z)+|A)*/
+    ZABCDEFG
+
+/(Z()|A)*/
+    ZABCDEFG
+
+/(Z(())|A)*/
+    ZABCDEFG
+
+/((?>Z)+|A)*/
+    ZABCDEFG
+
+/((?>)+|A)*/
+    ZABCDEFG
+
+/a*/g
+    abbab
+
+/^[a-\d]/
+    abcde
+    -things
+    0digit
+    *** Failers
+    bcdef    
+
+/^[\d-a]/
+    abcde
+    -things
+    0digit
+    *** Failers
+    bcdef    
+    
+/[[:space:]]+/
+    > \x09\x0a\x0c\x0d\x0b<
+     
+/[[:blank:]]+/
+    > \x09\x0a\x0c\x0d\x0b<
+     
+/[\s]+/
+    > \x09\x0a\x0c\x0d\x0b<
+     
+/\s+/
+    > \x09\x0a\x0c\x0d\x0b<
+     
+/ab/x
+    ab
+
+/(?!\A)x/m
+  a\nxb\n
+
+/(?!^)x/m
+  a\nxb\n
+
+/abc\Qabc\Eabc/
+    abcabcabc
+    
+/abc\Q(*+|\Eabc/
+    abc(*+|abc 
+
+/   abc\Q abc\Eabc/x
+    abc abcabc
+    *** Failers
+    abcabcabc  
+    
+/abc#comment
+    \Q#not comment
+    literal\E/x
+    abc#not comment\n    literal     
+
+/abc#comment
+    \Q#not comment
+    literal/x
+    abc#not comment\n    literal     
+
+/abc#comment
+    \Q#not comment
+    literal\E #more comment
+    /x
+    abc#not comment\n    literal     
+
+/abc#comment
+    \Q#not comment
+    literal\E #more comment/x
+    abc#not comment\n    literal     
+
+/\Qabc\$xyz\E/
+    abc\\\$xyz
+
+/\Qabc\E\$\Qxyz\E/
+    abc\$xyz
+
+/\Gabc/
+    abc
+    *** Failers
+    xyzabc  
+
+/\Gabc./g
+    abc1abc2xyzabc3
+
+/abc./g
+    abc1abc2xyzabc3 
+
+/a(?x: b c )d/
+    XabcdY
+    *** Failers 
+    Xa b c d Y 
+
+/((?x)x y z | a b c)/
+    XabcY
+    AxyzB 
+
+/(?i)AB(?-i)C/
+    XabCY
+    *** Failers
+    XabcY  
+
+/((?i)AB(?-i)C|D)E/
+    abCE
+    DE
+    *** Failers
+    abcE
+    abCe  
+    dE
+    De    
+
+/(.*)\d+\1/
+    abc123abc
+    abc123bc 
+
+/(.*)\d+\1/s
+    abc123abc
+    abc123bc 
+    
+/((.*))\d+\1/
+    abc123abc
+    abc123bc  
+
+/-- This tests for an IPv6 address in the form where it can have up to --/
+/-- eight components, one and only one of which is empty. This must be --/
+/-- an internal component. --/
+
+/^(?!:)                       # colon disallowed at start
+  (?:                         # start of item
+    (?: [0-9a-f]{1,4} |       # 1-4 hex digits or
+    (?(1)0 | () ) )           # if null previously matched, fail; else null
+    :                         # followed by colon
+  ){1,7}                      # end item; 1-7 of them required               
+  [0-9a-f]{1,4} $             # final hex number at end of string
+  (?(1)|.)                    # check that there was an empty component
+  /xi
+    a123::a123
+    a123:b342::abcd
+    a123:b342::324e:abcd
+    a123:ddde:b342::324e:abcd
+    a123:ddde:b342::324e:dcba:abcd
+    a123:ddde:9999:b342::324e:dcba:abcd
+    *** Failers
+    1:2:3:4:5:6:7:8
+    a123:bce:ddde:9999:b342::324e:dcba:abcd
+    a123::9999:b342::324e:dcba:abcd
+    abcde:2:3:4:5:6:7:8
+    ::1
+    abcd:fee0:123::   
+    :1
+    1:  
+
+/[z\Qa-d]\E]/
+    z
+    a
+    -
+    d
+    ] 
+    *** Failers
+    b     
+
+/[\z\C]/
+    z
+    C 
+    
+/\M/
+    M 
+    
+/(a+)*b/
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 
+    
+/(?i)reg(?:ul(?:[a�]|ae)r|ex)/
+    REGular
+    regulaer
+    Regex  
+    regul�r 
+
+/����[�-��-�]+/
+    �����
+    �����
+    �����
+    �����
+
+/(?<=Z)X./
+  \x84XAZXB
+
+/ End of testinput1 /
diff --git a/external-libs/pcre/testdata/testinput2 b/external-libs/pcre/testdata/testinput2
new file mode 100644
index 00000000..710bcc99
--- /dev/null
+++ b/external-libs/pcre/testdata/testinput2
@@ -0,0 +1,1259 @@
+/(a)b|/
+
+/abc/
+    abc
+    defabc
+    \Aabc
+    *** Failers
+    \Adefabc
+    ABC
+
+/^abc/
+    abc
+    \Aabc
+    *** Failers
+    defabc
+    \Adefabc
+
+/a+bc/
+
+/a*bc/
+
+/a{3}bc/
+
+/(abc|a+z)/
+
+/^abc$/
+    abc
+    *** Failers
+    def\nabc
+
+/ab\gdef/X
+
+/(?X)ab\gdef/X
+
+/x{5,4}/
+
+/z{65536}/
+
+/[abcd/
+
+/(?X)[\B]/
+
+/[z-a]/
+
+/^*/
+
+/(abc/
+
+/(?# abc/
+
+/(?z)abc/
+
+/.*b/
+
+/.*?b/
+
+/cat|dog|elephant/
+    this sentence eventually mentions a cat
+    this sentences rambles on and on for a while and then reaches elephant
+
+/cat|dog|elephant/S
+    this sentence eventually mentions a cat
+    this sentences rambles on and on for a while and then reaches elephant
+
+/cat|dog|elephant/iS
+    this sentence eventually mentions a CAT cat
+    this sentences rambles on and on for a while to elephant ElePhant
+
+/a|[bcd]/S
+
+/(a|[^\dZ])/S
+
+/(a|b)*[\s]/S
+
+/(ab\2)/
+
+/{4,5}abc/
+
+/(a)(b)(c)\2/
+    abcb
+    \O0abcb
+    \O3abcb
+    \O6abcb
+    \O9abcb
+    \O12abcb 
+
+/(a)bc|(a)(b)\2/
+    abc
+    \O0abc
+    \O3abc
+    \O6abc
+    aba
+    \O0aba
+    \O3aba
+    \O6aba
+    \O9aba
+    \O12aba
+
+/abc$/E
+    abc
+    *** Failers
+    abc\n
+    abc\ndef
+
+/(a)(b)(c)(d)(e)\6/
+
+/the quick brown fox/
+    the quick brown fox
+    this is a line with the quick brown fox
+
+/the quick brown fox/A
+    the quick brown fox
+    *** Failers
+    this is a line with the quick brown fox
+
+/ab(?z)cd/
+
+/^abc|def/
+    abcdef
+    abcdef\B
+
+/.*((abc)$|(def))/
+    defabc
+    \Zdefabc
+
+/abc/P
+    abc
+    *** Failers
+    
+/^abc|def/P
+    abcdef
+    abcdef\B
+
+/.*((abc)$|(def))/P
+    defabc
+    \Zdefabc
+  
+/the quick brown fox/P
+    the quick brown fox
+    *** Failers 
+    The Quick Brown Fox 
+
+/the quick brown fox/Pi
+    the quick brown fox
+    The Quick Brown Fox 
+
+/abc.def/P
+    *** Failers
+    abc\ndef
+    
+/abc$/P
+    abc
+    abc\n 
+
+/(abc)\2/P
+
+/(abc\1)/P
+    abc
+
+/)/
+
+/a[]b/
+
+/[^aeiou ]{3,}/
+    co-processors, and for 
+    
+/<.*>/
+    abc<def>ghi<klm>nop
+
+/<.*?>/
+    abc<def>ghi<klm>nop
+
+/<.*>/U
+    abc<def>ghi<klm>nop
+    
+/(?U)<.*>/
+    abc<def>ghi<klm>nop
+
+/<.*?>/U
+    abc<def>ghi<klm>nop
+    
+/={3,}/U
+    abc========def
+    
+/(?U)={3,}?/
+    abc========def
+    
+/(?<!bar|cattle)foo/
+    foo
+    catfoo 
+    *** Failers
+    the barfoo
+    and cattlefoo   
+
+/(?<=a+)b/
+
+/(?<=aaa|b{0,3})b/
+
+/(?<!(foo)a\1)bar/
+
+/(?i)abc/
+
+/(a|(?m)a)/
+
+/(?i)^1234/
+
+/(^b|(?i)^d)/
+
+/(?s).*/
+
+/[abcd]/S
+
+/(?i)[abcd]/S
+
+/(?m)[xy]|(b|c)/S
+
+/(^a|^b)/m
+
+/(?i)(^a|^b)/m
+
+/(a)(?(1)a|b|c)/
+
+/(?(?=a)a|b|c)/
+
+/(?(1a)/
+
+/(?(?i))/
+
+/(?(abc))/
+
+/(?(?<ab))/
+
+/((?s)blah)\s+\1/
+
+/((?i)blah)\s+\1/
+
+/((?i)b)/DS
+
+/(a*b|(?i:c*(?-i)d))/S
+
+/a$/
+    a
+    a\n
+    *** Failers 
+    \Za
+    \Za\n   
+
+/a$/m
+    a
+    a\n
+    \Za\n   
+    *** Failers 
+    \Za
+    
+/\Aabc/m
+
+/^abc/m 
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/
+  aaaaabbbbbcccccdef
+
+/(?<=foo)[ab]/S
+
+/(?<!foo)(alpha|omega)/S
+
+/(?!alphabet)[ab]/S
+
+/(?<=foo\n)^bar/m
+
+/(?>^abc)/m
+    abc
+    def\nabc
+    *** Failers
+    defabc   
+
+/(?<=ab(c+)d)ef/
+
+/(?<=ab(?<=c+)d)ef/
+
+/(?<=ab(c|de)f)g/
+
+/The next three are in testinput2 because they have variable length branches/
+
+/(?<=bullock|donkey)-cart/
+    the bullock-cart
+    a donkey-cart race
+    *** Failers
+    cart
+    horse-and-cart    
+      
+/(?<=ab(?i)x|y|z)/
+
+/(?>.*)(?<=(abcd)|(xyz))/
+    alphabetabcd
+    endingxyz
+
+/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/
+    abxyZZ
+    abXyZZ
+    ZZZ
+    zZZ
+    bZZ
+    BZZ     
+    *** Failers
+    ZZ 
+    abXYZZ 
+    zzz
+    bzz  
+
+/(?<!(foo)a)bar/
+    bar
+    foobbar 
+    *** Failers
+    fooabar  
+
+/This one is here because Perl 5.005_02 doesn't fail it/
+
+/^(a)?(?(1)a|b)+$/
+    *** Failers
+    a 
+
+/This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/
+
+/^(a\1?){4}$/
+    aaaaaa
+    
+/These are syntax tests from Perl 5.005/
+
+/a[b-a]/
+
+/a[]b/
+
+/a[/
+
+/*a/
+
+/(*)b/
+
+/abc)/
+
+/(abc/
+
+/a**/
+
+/)(/
+
+/\1/
+
+/\2/
+
+/(a)|\2/
+
+/a[b-a]/i
+
+/a[]b/i
+
+/a[/i
+
+/*a/i
+
+/(*)b/i
+
+/abc)/i
+
+/(abc/i
+
+/a**/i
+
+/)(/i
+
+/:(?:/
+
+/(?<%)b/
+
+/a(?{)b/
+
+/a(?{{})b/
+
+/a(?{}})b/
+
+/a(?{"{"})b/
+
+/a(?{"{"}})b/
+
+/(?(1?)a|b)/
+
+/(?(1)a|b|c)/
+
+/[a[:xyz:/
+
+/(?<=x+)y/
+
+/a{37,17}/
+
+/abc/\
+
+/abc/\P
+
+/abc/\i
+
+/(a)bc(d)/
+    abcd
+    abcd\C2
+    abcd\C5
+     
+/(.{20})/
+    abcdefghijklmnopqrstuvwxyz
+    abcdefghijklmnopqrstuvwxyz\C1
+    abcdefghijklmnopqrstuvwxyz\G1
+     
+/(.{15})/
+    abcdefghijklmnopqrstuvwxyz
+    abcdefghijklmnopqrstuvwxyz\C1\G1
+
+/(.{16})/
+    abcdefghijklmnopqrstuvwxyz
+    abcdefghijklmnopqrstuvwxyz\C1\G1\L
+    
+/^(a|(bc))de(f)/
+    adef\G1\G2\G3\G4\L 
+    bcdef\G1\G2\G3\G4\L 
+    adefghijk\C0 
+    
+/^abc\00def/
+    abc\00def\L\C0 
+    
+/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ 
+)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ 
+)?)?)?)?)?)?)?)?)?otherword/M
+
+/.*X/D
+
+/.*X/Ds
+
+/(.*X|^B)/D
+
+/(.*X|^B)/Ds
+    
+/(?s)(.*X|^B)/D
+
+/(?s:.*X|^B)/D
+
+/\Biss\B/+
+    Mississippi
+
+/\Biss\B/+P
+    Mississippi
+
+/iss/G+
+    Mississippi
+
+/\Biss\B/G+
+    Mississippi
+
+/\Biss\B/g+
+    Mississippi
+    *** Failers
+    Mississippi\A
+
+/(?<=[Ms])iss/g+
+    Mississippi
+
+/(?<=[Ms])iss/G+
+    Mississippi
+
+/^iss/g+
+    ississippi
+    
+/.*iss/g+
+    abciss\nxyzisspqr 
+
+/.i./+g
+    Mississippi
+    Mississippi\A
+    Missouri river
+    Missouri river\A  
+
+/^.is/+g
+    Mississippi
+
+/^ab\n/g+
+    ab\nab\ncd
+
+/^ab\n/mg+
+    ab\nab\ncd
+
+/abc/
+
+/abc|bac/
+
+/(abc|bac)/
+
+/(abc|(c|dc))/
+
+/(abc|(d|de)c)/
+
+/a*/
+
+/a+/
+
+/(baa|a+)/
+
+/a{0,3}/
+
+/baa{3,}/
+
+/"([^\\"]+|\\.)*"/
+
+/(abc|ab[cd])/
+
+/(a|.)/
+
+/a|ba|\w/
+
+/abc(?=pqr)/
+
+/...(?<=abc)/
+
+/abc(?!pqr)/
+
+/ab./
+
+/ab[xyz]/
+
+/abc*/
+
+/ab.c*/
+
+/a.c*/
+
+/.c*/
+
+/ac*/
+
+/(a.c*|b.c*)/
+
+/a.c*|aba/
+
+/.+a/
+
+/(?=abcda)a.*/
+
+/(?=a)a.*/
+
+/a(b)*/
+
+/a\d*/
+
+/ab\d*/
+
+/a(\d)*/
+
+/abcde{0,0}/
+
+/ab\d+/
+
+/a(?(1)b)/
+
+/a(?(1)bag|big)/
+
+/a(?(1)bag|big)*/
+
+/a(?(1)bag|big)+/
+
+/a(?(1)b..|b..)/
+
+/ab\d{0}e/
+
+/a?b?/
+    a
+    b
+    ab
+    \
+    *** Failers
+    \N     
+    
+/|-/
+    abcd
+    -abc
+    \Nab-c
+    *** Failers
+    \Nabc     
+
+/a*(b+)(z)(z)/P
+    aaaabbbbzzzz
+    aaaabbbbzzzz\O0
+    aaaabbbbzzzz\O1
+    aaaabbbbzzzz\O2
+    aaaabbbbzzzz\O3
+    aaaabbbbzzzz\O4
+    aaaabbbbzzzz\O5
+    
+/^.?abcd/S 
+
+/\(             # ( at start
+  (?:           # Non-capturing bracket
+  (?>[^()]+)    # Either a sequence of non-brackets (no backtracking)
+  |             # Or
+  (?R)          # Recurse - i.e. nested bracketed string
+  )*            # Zero or more contents
+  \)            # Closing )
+  /x
+    (abcd)
+    (abcd)xyz
+    xyz(abcd)
+    (ab(xy)cd)pqr 
+    (ab(xycd)pqr 
+    () abc () 
+    12(abcde(fsh)xyz(foo(bar))lmno)89
+    *** Failers
+    abcd 
+    abcd)
+    (abcd  
+
+/\(  ( (?>[^()]+) | (?R) )* \) /xg
+    (ab(xy)cd)pqr 
+    1(abcd)(x(y)z)pqr
+
+/\(  (?: (?>[^()]+) | (?R) ) \) /x
+    (abcd)
+    (ab(xy)cd)
+    (a(b(c)d)e) 
+    ((ab)) 
+    *** Failers
+    ()   
+
+/\(  (?: (?>[^()]+) | (?R) )? \) /x
+    ()
+    12(abcde(fsh)xyz(foo(bar))lmno)89
+
+/\(  ( (?>[^()]+) | (?R) )* \) /x
+    (ab(xy)cd)
+
+/\( ( ( (?>[^()]+) | (?R) )* ) \) /x
+    (ab(xy)cd)
+
+/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x
+    (ab(xy)cd)
+    (123ab(xy)cd)
+
+/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x
+    (ab(xy)cd)
+    (123ab(xy)cd)
+
+/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x
+    (ab(xy)cd)
+
+/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x
+    (abcd(xyz<p>qrs)123)
+
+/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x
+    (ab(cd)ef)
+    (ab(cd(ef)gh)ij)
+
+/^[[:alnum:]]/D
+
+/^[[:alpha:]]/D
+             
+/^[[:ascii:]]/D
+
+/^[[:blank:]]/D
+
+/^[[:cntrl:]]/D
+
+/^[[:digit:]]/D
+
+/^[[:graph:]]/D
+
+/^[[:lower:]]/D
+
+/^[[:print:]]/D
+
+/^[[:punct:]]/D
+
+/^[[:space:]]/D
+
+/^[[:upper:]]/D
+
+/^[[:xdigit:]]/D
+
+/^[[:word:]]/D
+
+/^[[:^cntrl:]]/D
+
+/^[12[:^digit:]]/D
+
+/^[[:^blank:]]/D
+
+/[01[:alpha:]%]/D
+
+/[[.ch.]]/
+
+/[[=ch=]]/
+
+/[[:rhubarb:]]/
+
+/[[:upper:]]/i
+    A
+    a 
+    
+/[[:lower:]]/i
+    A
+    a 
+
+/((?-i)[[:lower:]])[[:lower:]]/i
+    ab
+    aB
+    *** Failers
+    Ab
+    AB        
+
+/[\200-\410]/
+
+/^(?(0)f|b)oo/
+
+/This one's here because of the large output vector needed/
+
+/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/
+    \O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+
+/This one's here because Perl does this differently and PCRE can't at present/
+
+/(main(O)?)+/
+    mainmain
+    mainOmain
+    
+/These are all cases where Perl does it differently (nested captures)/
+
+/^(a(b)?)+$/
+    aba
+   
+/^(aa(bb)?)+$/
+    aabbaa    
+    
+/^(aa|aa(bb))+$/
+    aabbaa 
+    
+/^(aa(bb)??)+$/
+    aabbaa    
+    
+/^(?:aa(bb)?)+$/
+    aabbaa    
+    
+/^(aa(b(b))?)+$/
+    aabbaa    
+
+/^(?:aa(b(b))?)+$/
+    aabbaa    
+
+/^(?:aa(b(?:b))?)+$/
+    aabbaa    
+
+/^(?:aa(bb(?:b))?)+$/
+    aabbbaa    
+    
+/^(?:aa(b(?:bb))?)+$/
+    aabbbaa    
+
+/^(?:aa(?:b(b))?)+$/
+    aabbaa    
+
+/^(?:aa(?:b(bb))?)+$/
+    aabbbaa    
+
+/^(aa(b(bb))?)+$/
+    aabbbaa    
+
+/^(aa(bb(bb))?)+$/
+    aabbbbaa    
+
+/--------------------------------------------------------------------/ 
+    
+/#/xMD
+
+/a#/xMD
+
+/[\s]/D
+
+/[\S]/D
+
+/a(?i)b/D
+    ab
+    aB
+    *** Failers 
+    AB  
+
+/(a(?i)b)/D
+    ab
+    aB
+    *** Failers 
+    AB  
+    
+/   (?i)abc/xD
+
+/#this is a comment
+  (?i)abc/xD
+
+/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+
+/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+
+/\Q\E/D
+    \
+
+/\Q\Ex/D
+
+/ \Q\E/D
+
+/a\Q\E/D
+  abc
+  bca
+  bac  
+
+/a\Q\Eb/D
+  abc
+
+/\Q\Eabc/D
+
+/x*+\w/D
+    *** Failers
+    xxxxx
+    
+/x?+/D
+
+/x++/D
+
+/x{1,3}+/D 
+
+/(x)*+/D
+
+/^(\w++|\s++)*$/
+    now is the time for all good men to come to the aid of the party
+    *** Failers
+    this is not a line with only words and spaces!
+    
+/(\d++)(\w)/
+    12345a
+    *** Failers
+    12345+ 
+
+/a++b/
+    aaab
+
+/(a++b)/
+    aaab
+
+/(a++)b/
+    aaab
+
+/([^()]++|\([^()]*\))+/
+    ((abc(ade)ufh()()x
+    
+/\(([^()]++|\([^()]+\))+\)/ 
+    (abc)
+    (abc(def)xyz)
+    *** Failers
+    ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa   
+
+/(abc){1,3}+/D
+
+/a+?+/
+
+/a{2,3}?+b/
+
+/(?U)a+?+/
+
+/a{2,3}?+b/U
+
+/x(?U)a++b/D
+    xaaaab
+
+/(?U)xa++b/D
+    xaaaab
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/D
+
+/^x(?U)a+b/D
+
+/^x(?U)(a+)b/D
+
+/[.x.]/
+
+/[=x=]/
+
+/[:x:]/
+
+/\l/
+
+/\L/
+
+/\N{name}/
+
+/\pP/
+
+/\PP/
+
+/\p{prop}/
+
+/\P{prop}/
+
+/\u/
+
+/\U/
+
+/\X/
+
+/[/
+
+/[a-/
+
+/[[:space:]/
+
+/[\s]/DM
+
+/[[:space:]]/DM
+
+/[[:space:]abcde]/DM
+
+/< (?: (?(R) \d++  | [^<>]*+) | (?R)) * >/x
+    <>
+    <abcd>
+    <abc <123> hij>
+    <abc <def> hij>
+    <abc<>def> 
+    <abc<>      
+    *** Failers
+    <abc
+
+|8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+
+|\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+
+/(.*)\d+\1/I
+
+/(.*)\d+/I
+    
+/(.*)\d+\1/Is
+
+/(.*)\d+/Is
+
+/(.*(xyz))\d+\2/I
+
+/((.*))\d+\1/I
+    abc123bc
+    
+/a[b]/I
+
+/(?=a).*/I
+
+/(?=abc).xyz/iI
+
+/(?=abc)(?i).xyz/I
+
+/(?=a)(?=b)/I
+
+/(?=.)a/I
+
+/((?=abcda)a)/I
+
+/((?=abcda)ab)/I
+
+/()a/I
+
+/(?(1)ab|ac)/I
+
+/(?(1)abz|acz)/I
+
+/(?(1)abz)/I
+
+/(?(1)abz)123/I
+
+/(a)+/I
+
+/(a){2,3}/I
+
+/(a)*/I
+
+/[a]/I
+
+/[ab]/I
+
+/[ab]/IS
+
+/[^a]/I
+
+/\d456/I
+
+/\d456/IS
+
+/a^b/I
+
+/^a/mI
+  abcde
+  xy\nabc 
+  *** Failers 
+  xyabc 
+
+/c|abc/I
+
+/(?i)[ab]/IS
+
+/[ab](?i)cd/IS
+
+/abc(?C)def/
+    abcdef
+    1234abcdef 
+    *** Failers
+    abcxyz
+    abcxyzf   
+
+/abc(?C)de(?C1)f/
+    123abcdef
+    
+/(?C1)\dabc(?C2)def/ 
+    1234abcdef
+    *** Failers
+    abcdef 
+    
+/(?C255)ab/
+
+/(?C256)ab/
+
+/(?Cab)xx/ 
+
+/(?C12vr)x/
+
+/abc(?C)def/
+    *** Failers
+    \x83\x0\x61bcdef
+
+/(abc)(?C)de(?C1)f/
+    123abcdef
+    123abcdef\C+ 
+    123abcdef\C- 
+    *** Failers
+    123abcdef\C!1 
+    
+/(?C0)(abc(?C1))*/
+    abcabcabc
+    abcabc\C!1!3   
+    *** Failers
+    abcabcabc\C!1!3   
+
+/(\d{3}(?C))*/
+    123\C+
+    123456\C+
+    123456789\C+  
+
+/((xyz)(?C)p|(?C1)xyzabc)/
+    xyzabc\C+
+
+/(X)((xyz)(?C)p|(?C1)xyzabc)/
+    Xxyzabc\C+
+
+/(?=(abc))(?C)abcdef/
+    abcdef\C+
+    
+/(?!(abc)(?C1)d)(?C2)abcxyz/
+    abcxyz\C+ 
+
+/(?<=(abc)(?C))xyz/
+   abcxyz\C+
+   
+/(?C)abc/ 
+
+/(?C)^abc/
+
+/(?C)a|b/S
+
+/(?R)/
+
+/(a|(?R))/
+
+/(ab|(bc|(de|(?R))))/
+
+/x(ab|(bc|(de|(?R))))/
+    xab
+    xbc
+    xde
+    xxab
+    xxxab
+    *** Failers
+    xyab   
+
+/(ab|(bc|(de|(?1))))/
+
+/x(ab|(bc|(de|(?1)x)x)x)/
+
+/^([^()]|\((?1)*\))*$/
+    abc
+    a(b)c
+    a(b(c))d  
+    *** Failers)
+    a(b(c)d  
+
+/^>abc>([^()]|\((?1)*\))*<xyz<$/
+   >abc>123<xyz<
+   >abc>1(2)3<xyz<
+   >abc>(1(2)3)<xyz<
+
+/(a(?1)b)/D
+
+/(a(?1)+b)/D
+
+/^\W*(?:((.)\W*(?1)\W*\2|)|((.)\W*(?3)\W*\4|\W*.\W*))\W*$/i
+    1221
+    Satan, oscillate my metallic sonatas!
+    A man, a plan, a canal: Panama!
+    Able was I ere I saw Elba. 
+    *** Failers
+    The quick brown fox  
+    
+/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
+    12
+    (((2+2)*-3)-7)
+    -12
+    *** Failers
+    ((2+2)*-3)-7)
+         
+/^(x(y|(?1){2})z)/
+    xyz
+    xxyzxyzz 
+    *** Failers
+    xxyzz
+    xxyzxyzxyzz   
+
+/((< (?: (?(R) \d++  | [^<>]*+) | (?2)) * >))/x
+    <>
+    <abcd>
+    <abc <123> hij>
+    <abc <def> hij>
+    <abc<>def> 
+    <abc<>      
+    *** Failers
+    <abc
+
+/(?1)/
+
+/((?2)(abc)/
+
+/^(abc)def(?1)/
+    abcdefabc
+
+/^(a|b|c)=(?1)+/
+    a=a
+    a=b
+    a=bc  
+
+/^(a|b|c)=((?1))+/
+    a=a
+    a=b
+    a=bc  
+
+/a(?P<name1>b|c)d(?P<longername2>e)/D
+    abde
+    acde 
+
+/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/D
+
+/(?P<a>a)...(?P=a)bbb(?P>a)d/D
+
+/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/i
+    1221
+    Satan, oscillate my metallic sonatas!
+    A man, a plan, a canal: Panama!
+    Able was I ere I saw Elba. 
+    *** Failers
+    The quick brown fox  
+    
+/((?(R)a|b))\1(?1)?/
+  bb
+  bbaa 
+
+/(.*)a/sI
+
+/(.*)a\1/sI
+
+/(.*)a(b)\2/sI
+
+/((.*)a|(.*)b)z/sI
+
+/((.*)a|(.*)b)z\1/sI
+
+/((.*)a|(.*)b)z\2/sI
+
+/((.*)a|(.*)b)z\3/sI
+
+/((.*)a|^(.*)b)z\3/sI
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/sI
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/sI
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/sI
+
+/(a)(bc)/ND
+  abc
+
+/(?P<one>a)(bc)/ND
+  abc
+
+/(a)(?P<named>bc)/ND
+
+/(a+)*zz/
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazzbbbbbb\M
+  aaaaaaaaaaaaaz\M
+
+/(aaa(?C1)bbb|ab)/
+   aaabbb
+   aaabbb\C*0
+   aaabbb\C*1
+   aaabbb\C*-1
+
+/ab(?P<one>cd)ef(?P<two>gh)/
+    abcdefgh
+    abcdefgh\C1\Gtwo
+    abcdefgh\Cone\Ctwo
+    abcdefgh\Cthree  
+
+/(?P<Tes>)(?P<Test>)/D
+
+/(?P<Test>)(?P<Tes>)/D
+
+/(?P<Z>zz)(?P<A>aa)/
+    zzaa\CZ
+    zzaa\CA
+
+/(?P<x>eks)(?P<x>eccs)/
+
+/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/
+
+"\[((?P<elem>\d+)(,(?P>elem))*)\]"
+    [10,20,30,5,5,4,4,2,43,23,4234]
+    *** Failers
+    []  
+
+"\[((?P<elem>\d+)(,(?P>elem))*)?\]"
+    [10,20,30,5,5,4,4,2,43,23,4234]
+    [] 
+
+/(a(b(?2)c))?/D
+
+/(a(b(?2)c))*/D
+
+/(a(b(?2)c)){0,2}/D
+
+/[ab]{1}+/D
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/i
+     Baby Bjorn Active Carrier - With free SHIPPING!!
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/iS
+     Baby Bjorn Active Carrier - With free SHIPPING!!
+     
+/a*.*b/SD
+
+/(a|b)*.?c/SD 
+
+/ End of testinput2 /
diff --git a/external-libs/pcre/testdata/testinput3 b/external-libs/pcre/testdata/testinput3
new file mode 100644
index 00000000..c2abdbfd
--- /dev/null
+++ b/external-libs/pcre/testdata/testinput3
@@ -0,0 +1,65 @@
+/^[\w]+/
+    *** Failers
+    �cole
+
+/^[\w]+/Lfr_FR
+    �cole
+
+/^[\w]+/
+    *** Failers
+    �cole
+
+/^[\W]+/
+    �cole
+
+/^[\W]+/Lfr_FR
+    *** Failers
+    �cole
+
+/[\b]/
+    \b
+    *** Failers
+    a
+
+/[\b]/Lfr_FR
+    \b
+    *** Failers
+    a
+
+/^\w+/
+    *** Failers
+    �cole
+
+/^\w+/Lfr_FR
+    �cole
+
+/(.+)\b(.+)/
+    �cole
+
+/(.+)\b(.+)/Lfr_FR
+    *** Failers
+    �cole
+
+/�cole/i
+    �cole
+    *** Failers
+    �cole
+
+/�cole/iLfr_FR
+    �cole
+    �cole
+
+/\w/IS
+
+/\w/ISLfr_FR
+
+/^[\xc8-\xc9]/iLfr_FR
+    �cole
+    �cole
+
+/^[\xc8-\xc9]/Lfr_FR
+    �cole
+    *** Failers 
+    �cole
+
+/ End of testinput3 /
diff --git a/external-libs/pcre/testdata/testinput4 b/external-libs/pcre/testdata/testinput4
new file mode 100644
index 00000000..f9212150
--- /dev/null
+++ b/external-libs/pcre/testdata/testinput4
@@ -0,0 +1,517 @@
+/-- Do not use the \x{} construct except with patterns that have the --/
+/-- /8 option set, because PCRE doesn't recognize them as UTF-8 unless --/
+/-- that option is set. However, the latest Perls recognize them always. --/
+
+/a.b/8
+    acb
+    a\x7fb
+    a\x{100}b 
+    *** Failers
+    a\nb  
+
+/a(.{3})b/8
+    a\x{4000}xyb 
+    a\x{4000}\x7fyb 
+    a\x{4000}\x{100}yb 
+    *** Failers
+    a\x{4000}b 
+    ac\ncb 
+
+/a(.*?)(.)/
+    a\xc0\x88b
+
+/a(.*?)(.)/8
+    a\x{100}b
+
+/a(.*)(.)/
+    a\xc0\x88b
+
+/a(.*)(.)/8
+    a\x{100}b
+
+/a(.)(.)/
+    a\xc0\x92bcd
+
+/a(.)(.)/8
+    a\x{240}bcd
+
+/a(.?)(.)/
+    a\xc0\x92bcd
+
+/a(.?)(.)/8
+    a\x{240}bcd
+
+/a(.??)(.)/
+    a\xc0\x92bcd
+
+/a(.??)(.)/8
+    a\x{240}bcd
+
+/a(.{3})b/8
+    a\x{1234}xyb 
+    a\x{1234}\x{4321}yb 
+    a\x{1234}\x{4321}\x{3412}b 
+    *** Failers
+    a\x{1234}b 
+    ac\ncb 
+
+/a(.{3,})b/8
+    a\x{1234}xyb 
+    a\x{1234}\x{4321}yb 
+    a\x{1234}\x{4321}\x{3412}b 
+    axxxxbcdefghijb 
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+    *** Failers
+    a\x{1234}b 
+
+/a(.{3,}?)b/8
+    a\x{1234}xyb 
+    a\x{1234}\x{4321}yb 
+    a\x{1234}\x{4321}\x{3412}b 
+    axxxxbcdefghijb 
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+    *** Failers
+    a\x{1234}b 
+
+/a(.{3,5})b/8
+    a\x{1234}xyb 
+    a\x{1234}\x{4321}yb 
+    a\x{1234}\x{4321}\x{3412}b 
+    axxxxbcdefghijb 
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+    axbxxbcdefghijb 
+    axxxxxbcdefghijb 
+    *** Failers
+    a\x{1234}b 
+    axxxxxxbcdefghijb 
+
+/a(.{3,5}?)b/8
+    a\x{1234}xyb 
+    a\x{1234}\x{4321}yb 
+    a\x{1234}\x{4321}\x{3412}b 
+    axxxxbcdefghijb 
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+    axbxxbcdefghijb 
+    axxxxxbcdefghijb 
+    *** Failers
+    a\x{1234}b 
+    axxxxxxbcdefghijb 
+
+/^[a\x{c0}]/8
+    *** Failers
+    \x{100}
+
+/(?<=aXb)cd/8
+    aXbcd
+
+/(?<=a\x{100}b)cd/8
+    a\x{100}bcd
+
+/(?<=a\x{100000}b)cd/8
+    a\x{100000}bcd
+    
+/(?:\x{100}){3}b/8
+    \x{100}\x{100}\x{100}b
+    *** Failers 
+    \x{100}\x{100}b
+
+/\x{ab}/8
+    \x{ab} 
+    \xc2\xab
+    *** Failers 
+    \x00{ab}
+
+/(?<=(.))X/8
+    WXYZ
+    \x{256}XYZ 
+    *** Failers
+    XYZ 
+
+/X(\C{3})/8
+    X\x{1234}
+
+/X(\C{4})/8
+    X\x{1234}YZ
+    
+/X\C*/8
+    XYZabcdce
+    
+/X\C*?/8
+    XYZabcde
+    
+/X\C{3,5}/8
+    Xabcdefg   
+    X\x{1234} 
+    X\x{1234}YZ
+    X\x{1234}\x{512}  
+    X\x{1234}\x{512}YZ
+
+/X\C{3,5}?/8
+    Xabcdefg   
+    X\x{1234} 
+    X\x{1234}YZ
+    X\x{1234}\x{512}  
+
+/[^a]+/8g
+    bcd
+    \x{100}aY\x{256}Z 
+    
+/^[^a]{2}/8
+    \x{100}bc
+ 
+/^[^a]{2,}/8
+    \x{100}bcAa
+
+/^[^a]{2,}?/8
+    \x{100}bca
+
+/[^a]+/8ig
+    bcd
+    \x{100}aY\x{256}Z 
+    
+/^[^a]{2}/8i
+    \x{100}bc
+ 
+/^[^a]{2,}/8i
+    \x{100}bcAa
+
+/^[^a]{2,}?/8i
+    \x{100}bca
+
+/\x{100}{0,0}/8
+    abcd
+ 
+/\x{100}?/8
+    abcd
+    \x{100}\x{100} 
+
+/\x{100}{0,3}/8 
+    \x{100}\x{100} 
+    \x{100}\x{100}\x{100}\x{100} 
+    
+/\x{100}*/8
+    abce
+    \x{100}\x{100}\x{100}\x{100} 
+
+/\x{100}{1,1}/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+
+/\x{100}{1,3}/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+
+/\x{100}+/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+
+/\x{100}{3}/8
+    abcd\x{100}\x{100}\x{100}XX
+
+/\x{100}{3,5}/8
+    abcd\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}XX
+
+/\x{100}{3,}/8
+    abcd\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}XX
+
+/(?<=a\x{100}{2}b)X/8+
+    Xyyya\x{100}\x{100}bXzzz
+
+/\D*/8
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+
+/\D*/8
+  \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
+
+/\D/8
+    1X2
+    1\x{100}2 
+  
+/>\S/8
+    > >X Y
+    > >\x{100} Y
+  
+/\W/8
+    A.B
+    A\x{100}B 
+  
+/\d/8
+    \x{100}3
+    
+/\s/8
+    \x{100} X
+    
+/\w/8
+    \x{100}X   
+
+/\D+/8
+    12abcd34
+    *** Failers
+    1234  
+
+/\D{2,3}/8
+    12abcd34
+    12ab34
+    *** Failers  
+    1234
+    12a34  
+
+/\D{2,3}?/8
+    12abcd34
+    12ab34
+    *** Failers  
+    1234
+    12a34  
+
+/\d+/8
+    12abcd34
+    *** Failers
+
+/\d{2,3}/8
+    12abcd34
+    1234abcd
+    *** Failers  
+    1.4 
+
+/\d{2,3}?/8
+    12abcd34
+    1234abcd
+    *** Failers  
+    1.4 
+
+/\S+/8
+    12abcd34
+    *** Failers
+    \    \ 
+
+/\S{2,3}/8
+    12abcd34
+    1234abcd
+    *** Failers
+    \     \  
+
+/\S{2,3}?/8
+    12abcd34
+    1234abcd
+    *** Failers
+    \     \  
+
+/>\s+</8+
+    12>      <34
+    *** Failers
+
+/>\s{2,3}</8+
+    ab>  <cd
+    ab>   <ce
+    *** Failers
+    ab>    <cd 
+
+/>\s{2,3}?</8+
+    ab>  <cd
+    ab>   <ce
+    *** Failers
+    ab>    <cd 
+
+/\w+/8
+    12      34
+    *** Failers
+    +++=*! 
+
+/\w{2,3}/8
+    ab  cd
+    abcd ce
+    *** Failers
+    a.b.c
+
+/\w{2,3}?/8
+    ab  cd
+    abcd ce
+    *** Failers
+    a.b.c
+
+/\W+/8
+    12====34
+    *** Failers
+    abcd 
+
+/\W{2,3}/8
+    ab====cd
+    ab==cd
+    *** Failers
+    a.b.c
+
+/\W{2,3}?/8
+    ab====cd
+    ab==cd
+    *** Failers
+    a.b.c
+
+/[\x{100}]/8
+    \x{100}
+    Z\x{100}
+    \x{100}Z
+    *** Failers 
+
+/[Z\x{100}]/8
+    Z\x{100}
+    \x{100}
+    \x{100}Z
+    *** Failers 
+
+/[\x{100}\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   *** Failers  
+
+/[\x{100}-\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{111}cd 
+   *** Failers  
+
+/[z-\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{111}cd 
+   abzcd
+   ab|cd  
+   *** Failers  
+
+/[Q\x{100}\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   Q? 
+   *** Failers  
+
+/[Q\x{100}-\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{111}cd 
+   Q? 
+   *** Failers  
+
+/[Qz-\x{200}]/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{111}cd 
+   abzcd
+   ab|cd  
+   Q? 
+   *** Failers  
+
+/[\x{100}\x{200}]{1,3}/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{200}\x{100}\x{200}\x{100}cd
+   *** Failers  
+
+/[\x{100}\x{200}]{1,3}?/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{200}\x{100}\x{200}\x{100}cd
+   *** Failers  
+
+/[Q\x{100}\x{200}]{1,3}/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{200}\x{100}\x{200}\x{100}cd
+   *** Failers  
+
+/[Q\x{100}\x{200}]{1,3}?/8
+   ab\x{100}cd
+   ab\x{200}cd
+   ab\x{200}\x{100}\x{200}\x{100}cd
+   *** Failers  
+
+/(?<=[\x{100}\x{200}])X/8
+    abc\x{200}X
+    abc\x{100}X 
+    *** Failers
+    X  
+
+/(?<=[Q\x{100}\x{200}])X/8
+    abc\x{200}X
+    abc\x{100}X 
+    abQX 
+    *** Failers
+    X  
+
+/(?<=[\x{100}\x{200}]{3})X/8
+    abc\x{100}\x{200}\x{100}X
+    *** Failers
+    abc\x{200}X
+    X  
+
+/[^\x{100}\x{200}]X/8
+    AX
+    \x{150}X
+    \x{500}X 
+    *** Failers
+    \x{100}X
+    \x{200}X   
+
+/[^Q\x{100}\x{200}]X/8
+    AX
+    \x{150}X
+    \x{500}X 
+    *** Failers
+    \x{100}X
+    \x{200}X   
+    QX 
+
+/[^\x{100}-\x{200}]X/8
+    AX
+    \x{500}X 
+    *** Failers
+    \x{100}X
+    \x{150}X
+    \x{200}X   
+
+/a\Cb/
+    aXb
+    a\nb
+  
+/a\Cb/8
+    aXb
+    a\nb
+    *** Failers 
+    a\x{100}b 
+
+/[z-\x{100}]/8i
+    z
+    Z 
+    \x{100}
+    *** Failers
+    \x{101}
+    y    
+
+/[\xFF]/
+    >\xff<
+
+/[\xff]/8
+    >\x{ff}<
+
+/[^\xFF]/
+    XYZ
+
+/[^\xff]/8
+    XYZ
+    \x{123} 
+
+/^[ac]*b/8
+  xb
+
+/^[ac\x{100}]*b/8
+  xb
+
+/^[^x]*b/8i
+  xb
+
+/^[^x]*b/8
+  xb
+  
+/^\d*b/8
+  xb 
+
+/(|a)/g8
+    catac
+    a\x{256}a 
+
+/ End of testinput4 /
diff --git a/external-libs/pcre/testdata/testinput5 b/external-libs/pcre/testdata/testinput5
new file mode 100644
index 00000000..f71dc8d6
--- /dev/null
+++ b/external-libs/pcre/testdata/testinput5
@@ -0,0 +1,258 @@
+/\x{100}/8DM
+
+/\x{1000}/8DM
+
+/\x{10000}/8DM
+
+/\x{100000}/8DM
+
+/\x{1000000}/8DM
+
+/\x{4000000}/8DM
+
+/\x{7fffFFFF}/8DM
+
+/[\x{ff}]/8DM
+
+/[\x{100}]/8DM
+
+/\x{ffffffff}/8
+
+/\x{100000000}/8
+
+/^\x{100}a\x{1234}/8
+    \x{100}a\x{1234}bcd
+
+/\x80/8D
+
+/\xff/8D
+
+/\x{0041}\x{2262}\x{0391}\x{002e}/D8
+    \x{0041}\x{2262}\x{0391}\x{002e}
+    
+/\x{D55c}\x{ad6d}\x{C5B4}/D8 
+    \x{D55c}\x{ad6d}\x{C5B4} 
+
+/\x{65e5}\x{672c}\x{8a9e}/D8
+    \x{65e5}\x{672c}\x{8a9e}
+
+/\x{80}/D8
+
+/\x{084}/D8
+
+/\x{104}/D8
+
+/\x{861}/D8
+
+/\x{212ab}/D8
+
+/.{3,5}X/D8
+    \x{212ab}\x{212ab}\x{212ab}\x{861}X
+
+
+/.{3,5}?/D8
+    \x{212ab}\x{212ab}\x{212ab}\x{861}
+
+/-- These tests are here rather than in testinput4 because Perl 5.6 has --/
+/-- some problems with UTF-8 support, in the area of \x{..} where the   --/
+/-- value is < 255. It grumbles about invalid UTF-8 strings.            --/
+
+/^[a\x{c0}]b/8
+    \x{c0}b
+    
+/^([a\x{c0}]*?)aa/8
+    a\x{c0}aaaa/ 
+
+/^([a\x{c0}]*?)aa/8
+    a\x{c0}aaaa/ 
+    a\x{c0}a\x{c0}aaa/ 
+
+/^([a\x{c0}]*)aa/8
+    a\x{c0}aaaa/ 
+    a\x{c0}a\x{c0}aaa/ 
+
+/^([a\x{c0}]*)a\x{c0}/8
+    a\x{c0}aaaa/ 
+    a\x{c0}a\x{c0}aaa/ 
+    
+/-- --/ 
+    
+/(?<=\C)X/8
+    Should produce an error diagnostic
+    
+/-- This one is here not because it's different to Perl, but because the --/
+/-- way the captured single-byte is displayed. (In Perl it becomes a --/
+/-- character, and you can't tell the difference.) --/
+    
+/X(\C)(.*)/8
+    X\x{1234}
+    X\nabc 
+    
+/^[ab]/8D
+    bar
+    *** Failers
+    c
+    \x{ff}
+    \x{100}  
+
+/^[^ab]/8D
+    c
+    \x{ff}
+    \x{100}  
+    *** Failers 
+    aaa
+  
+/[^ab\xC0-\xF0]/8SD
+    \x{f1}
+    \x{bf}
+    \x{100}
+    \x{1000}   
+    *** Failers
+    \x{c0} 
+    \x{f0} 
+
+/Ā{3,4}/8SD
+  \x{100}\x{100}\x{100}\x{100\x{100}
+
+/(\x{100}+|x)/8SD
+
+/(\x{100}*a|x)/8SD
+
+/(\x{100}{0,2}a|x)/8SD
+
+/(\x{100}{1,2}a|x)/8SD
+
+/\x{100}*(\d+|"(?1)")/8
+    1234
+    "1234" 
+    \x{100}1234
+    "\x{100}1234"  
+    \x{100}\x{100}12ab 
+    \x{100}\x{100}"12" 
+    *** Failers 
+    \x{100}\x{100}abcd
+
+/\x{100}/8D
+
+/\x{100}*/8D
+
+/a\x{100}*/8D
+
+/ab\x{100}*/8D
+
+/a\x{100}\x{101}*/8D
+
+/a\x{100}\x{101}+/8D
+
+/\x{100}*A/8D
+    A
+
+/\x{100}*\d(?R)/8D
+
+/[^\x{c4}]/D
+
+/[^\x{c4}]/8D
+
+/[\x{100}]/8DM
+    \x{100}
+    Z\x{100}
+    \x{100}Z
+    *** Failers 
+
+/[Z\x{100}]/8DM
+    Z\x{100}
+    \x{100}
+    \x{100}Z
+    *** Failers 
+
+/[\x{200}-\x{100}]/8
+
+/[Ā-Ą]/8
+    \x{100}
+    \x{104}
+    *** Failers
+    \x{105}
+    \x{ff}    
+
+/[z-\x{100}]/8D
+
+/[z-\x{100}]/8Di
+
+/[z\Qa-d]Ā\E]/8D
+    \x{100}
+    Ā 
+
+/[\xFF]/D
+    >\xff<
+
+/[\xff]/D8
+    >\x{ff}<
+
+/[^\xFF]/D
+
+/[^\xff]/8D
+
+/[Ä-Ü]/8
+    Ö # Matches without Study
+    \x{d6}
+    
+/[Ä-Ü]/8S
+    Ö <-- Same with Study
+    \x{d6}
+    
+/[\x{c4}-\x{dc}]/8 
+    Ö # Matches without Study
+    \x{d6} 
+
+/[\x{c4}-\x{dc}]/8S
+    Ö <-- Same with Study
+    \x{d6} 
+
+/[�]/8
+
+/�/8
+
+/���xxx/8
+
+/���xxx/8?D
+
+/abc/8
+    �]
+    �
+    ���
+    ���\?
+
+/anything/8
+    \xc0\x80
+    \xc1\x8f 
+    \xe0\x9f\x80
+    \xf0\x8f\x80\x80 
+    \xf8\x87\x80\x80\x80  
+    \xfc\x83\x80\x80\x80\x80
+    \xfe\x80\x80\x80\x80\x80  
+    \xff\x80\x80\x80\x80\x80  
+    \xc3\x8f
+    \xe0\xaf\x80
+    \xe1\x80\x80
+    \xf0\x9f\x80\x80 
+    \xf1\x8f\x80\x80 
+    \xf8\x88\x80\x80\x80  
+    \xf9\x87\x80\x80\x80  
+    \xfc\x84\x80\x80\x80\x80
+    \xfd\x83\x80\x80\x80\x80
+
+/\x{100}abc(xyz(?1))/8D
+
+/[^\x{100}]abc(xyz(?1))/8D
+
+/[ab\x{100}]abc(xyz(?1))/8D
+
+/(\x{100}(b(?2)c))?/D8
+
+/(\x{100}(b(?2)c)){0,2}/D8
+
+/(\x{100}(b(?1)c))?/D8
+
+/(\x{100}(b(?1)c)){0,2}/D8
+
+/ End of testinput5 /
diff --git a/external-libs/pcre/testdata/testoutput1 b/external-libs/pcre/testdata/testoutput1
new file mode 100644
index 00000000..d1e03b0e
--- /dev/null
+++ b/external-libs/pcre/testdata/testoutput1
@@ -0,0 +1,6274 @@
+PCRE version 4.5 01-December-2003
+
+/the quick brown fox/
+    the quick brown fox
+ 0: the quick brown fox
+    The quick brown FOX
+No match
+    What do you know about the quick brown fox?
+ 0: the quick brown fox
+    What do you know about THE QUICK BROWN FOX?
+No match
+
+/The quick brown fox/i
+    the quick brown fox
+ 0: the quick brown fox
+    The quick brown FOX
+ 0: The quick brown FOX
+    What do you know about the quick brown fox?
+ 0: the quick brown fox
+    What do you know about THE QUICK BROWN FOX?
+ 0: THE QUICK BROWN FOX
+
+/abcd\t\n\r\f\a\e\071\x3b\$\\\?caxyz/
+    abcd\t\n\r\f\a\e9;\$\\?caxyz
+ 0: abcd\x09\x0a\x0d\x0c\x07\x1b9;$\?caxyz
+
+/a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz/
+    abxyzpqrrrabbxyyyypqAzz
+ 0: abxyzpqrrrabbxyyyypqAzz
+    abxyzpqrrrabbxyyyypqAzz
+ 0: abxyzpqrrrabbxyyyypqAzz
+    aabxyzpqrrrabbxyyyypqAzz
+ 0: aabxyzpqrrrabbxyyyypqAzz
+    aaabxyzpqrrrabbxyyyypqAzz
+ 0: aaabxyzpqrrrabbxyyyypqAzz
+    aaaabxyzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzpqrrrabbxyyyypqAzz
+    abcxyzpqrrrabbxyyyypqAzz
+ 0: abcxyzpqrrrabbxyyyypqAzz
+    aabcxyzpqrrrabbxyyyypqAzz
+ 0: aabcxyzpqrrrabbxyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypAzz
+ 0: aaabcxyzpqrrrabbxyyyypAzz
+    aaabcxyzpqrrrabbxyyyypqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqqAzz
+    aaabcxyzpqrrrabbxyyyypqqqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqqqAzz
+    aaaabcxyzpqrrrabbxyyyypqAzz
+ 0: aaaabcxyzpqrrrabbxyyyypqAzz
+    abxyzzpqrrrabbxyyyypqAzz
+ 0: abxyzzpqrrrabbxyyyypqAzz
+    aabxyzzzpqrrrabbxyyyypqAzz
+ 0: aabxyzzzpqrrrabbxyyyypqAzz
+    aaabxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaabxyzzzzpqrrrabbxyyyypqAzz
+    aaaabxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzzzzpqrrrabbxyyyypqAzz
+    abcxyzzpqrrrabbxyyyypqAzz
+ 0: abcxyzzpqrrrabbxyyyypqAzz
+    aabcxyzzzpqrrrabbxyyyypqAzz
+ 0: aabcxyzzzpqrrrabbxyyyypqAzz
+    aaabcxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaabcxyzzzzpqrrrabbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbbxyyyypqAzz
+    aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
+    aaabcxyzpqrrrabbxyyyypABzz
+ 0: aaabcxyzpqrrrabbxyyyypABzz
+    aaabcxyzpqrrrabbxyyyypABBzz
+ 0: aaabcxyzpqrrrabbxyyyypABBzz
+    >>>aaabxyzpqrrrabbxyyyypqAzz
+ 0: aaabxyzpqrrrabbxyyyypqAzz
+    >aaaabxyzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzpqrrrabbxyyyypqAzz
+    >>>>abcxyzpqrrrabbxyyyypqAzz
+ 0: abcxyzpqrrrabbxyyyypqAzz
+    *** Failers
+No match
+    abxyzpqrrabbxyyyypqAzz
+No match
+    abxyzpqrrrrabbxyyyypqAzz
+No match
+    abxyzpqrrrabxyyyypqAzz
+No match
+    aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
+No match
+    aaaabcxyzzzzpqrrrabbbxyyypqAzz
+No match
+    aaabcxyzpqrrrabbxyyyypqqqqqqqAzz
+No match
+
+/^(abc){1,2}zz/
+    abczz
+ 0: abczz
+ 1: abc
+    abcabczz
+ 0: abcabczz
+ 1: abc
+    *** Failers
+No match
+    zz
+No match
+    abcabcabczz
+No match
+    >>abczz
+No match
+
+/^(b+?|a){1,2}?c/
+    bc
+ 0: bc
+ 1: b
+    bbc
+ 0: bbc
+ 1: b
+    bbbc
+ 0: bbbc
+ 1: bb
+    bac
+ 0: bac
+ 1: a
+    bbac
+ 0: bbac
+ 1: a
+    aac
+ 0: aac
+ 1: a
+    abbbbbbbbbbbc
+ 0: abbbbbbbbbbbc
+ 1: bbbbbbbbbbb
+    bbbbbbbbbbbac
+ 0: bbbbbbbbbbbac
+ 1: a
+    *** Failers
+No match
+    aaac
+No match
+    abbbbbbbbbbbac
+No match
+
+/^(b+|a){1,2}c/
+    bc
+ 0: bc
+ 1: b
+    bbc
+ 0: bbc
+ 1: bb
+    bbbc
+ 0: bbbc
+ 1: bbb
+    bac
+ 0: bac
+ 1: a
+    bbac
+ 0: bbac
+ 1: a
+    aac
+ 0: aac
+ 1: a
+    abbbbbbbbbbbc
+ 0: abbbbbbbbbbbc
+ 1: bbbbbbbbbbb
+    bbbbbbbbbbbac
+ 0: bbbbbbbbbbbac
+ 1: a
+    *** Failers
+No match
+    aaac
+No match
+    abbbbbbbbbbbac
+No match
+
+/^(b+|a){1,2}?bc/
+    bbc
+ 0: bbc
+ 1: b
+
+/^(b*|ba){1,2}?bc/
+    babc
+ 0: babc
+ 1: ba
+    bbabc
+ 0: bbabc
+ 1: ba
+    bababc
+ 0: bababc
+ 1: ba
+    *** Failers
+No match
+    bababbc
+No match
+    babababc
+No match
+
+/^(ba|b*){1,2}?bc/
+    babc
+ 0: babc
+ 1: ba
+    bbabc
+ 0: bbabc
+ 1: ba
+    bababc
+ 0: bababc
+ 1: ba
+    *** Failers
+No match
+    bababbc
+No match
+    babababc
+No match
+
+/^\ca\cA\c[\c{\c:/
+    \x01\x01\e;z
+ 0: \x01\x01\x1b;z
+
+/^[ab\]cde]/
+    athing
+ 0: a
+    bthing
+ 0: b
+    ]thing
+ 0: ]
+    cthing
+ 0: c
+    dthing
+ 0: d
+    ething
+ 0: e
+    *** Failers
+No match
+    fthing
+No match
+    [thing
+No match
+    \\thing
+No match
+
+/^[]cde]/
+    ]thing
+ 0: ]
+    cthing
+ 0: c
+    dthing
+ 0: d
+    ething
+ 0: e
+    *** Failers
+No match
+    athing
+No match
+    fthing
+No match
+
+/^[^ab\]cde]/
+    fthing
+ 0: f
+    [thing
+ 0: [
+    \\thing
+ 0: \
+    *** Failers
+ 0: *
+    athing
+No match
+    bthing
+No match
+    ]thing
+No match
+    cthing
+No match
+    dthing
+No match
+    ething
+No match
+
+/^[^]cde]/
+    athing
+ 0: a
+    fthing
+ 0: f
+    *** Failers
+ 0: *
+    ]thing
+No match
+    cthing
+No match
+    dthing
+No match
+    ething
+No match
+
+/^\�/
+    �
+ 0: \x81
+
+/^�/
+    �
+ 0: \xff
+
+/^[0-9]+$/
+    0
+ 0: 0
+    1
+ 0: 1
+    2
+ 0: 2
+    3
+ 0: 3
+    4
+ 0: 4
+    5
+ 0: 5
+    6
+ 0: 6
+    7
+ 0: 7
+    8
+ 0: 8
+    9
+ 0: 9
+    10
+ 0: 10
+    100
+ 0: 100
+    *** Failers
+No match
+    abc
+No match
+
+/^.*nter/
+    enter
+ 0: enter
+    inter
+ 0: inter
+    uponter
+ 0: uponter
+
+/^xxx[0-9]+$/
+    xxx0
+ 0: xxx0
+    xxx1234
+ 0: xxx1234
+    *** Failers
+No match
+    xxx
+No match
+
+/^.+[0-9][0-9][0-9]$/
+    x123
+ 0: x123
+    xx123
+ 0: xx123
+    123456
+ 0: 123456
+    *** Failers
+No match
+    123
+No match
+    x1234
+ 0: x1234
+
+/^.+?[0-9][0-9][0-9]$/
+    x123
+ 0: x123
+    xx123
+ 0: xx123
+    123456
+ 0: 123456
+    *** Failers
+No match
+    123
+No match
+    x1234
+ 0: x1234
+
+/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
+    abc!pqr=apquxz.ixr.zzz.ac.uk
+ 0: abc!pqr=apquxz.ixr.zzz.ac.uk
+ 1: abc
+ 2: pqr
+    *** Failers
+No match
+    !pqr=apquxz.ixr.zzz.ac.uk
+No match
+    abc!=apquxz.ixr.zzz.ac.uk
+No match
+    abc!pqr=apquxz:ixr.zzz.ac.uk
+No match
+    abc!pqr=apquxz.ixr.zzz.ac.ukk
+No match
+
+/:/
+    Well, we need a colon: somewhere
+ 0: :
+    *** Fail if we don't
+No match
+
+/([\da-f:]+)$/i
+    0abc
+ 0: 0abc
+ 1: 0abc
+    abc
+ 0: abc
+ 1: abc
+    fed
+ 0: fed
+ 1: fed
+    E
+ 0: E
+ 1: E
+    ::
+ 0: ::
+ 1: ::
+    5f03:12C0::932e
+ 0: 5f03:12C0::932e
+ 1: 5f03:12C0::932e
+    fed def
+ 0: def
+ 1: def
+    Any old stuff
+ 0: ff
+ 1: ff
+    *** Failers
+No match
+    0zzz
+No match
+    gzzz
+No match
+    fed\x20
+No match
+    Any old rubbish
+No match
+
+/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
+    .1.2.3
+ 0: .1.2.3
+ 1: 1
+ 2: 2
+ 3: 3
+    A.12.123.0
+ 0: A.12.123.0
+ 1: 12
+ 2: 123
+ 3: 0
+    *** Failers
+No match
+    .1.2.3333
+No match
+    1.2.3
+No match
+    1234.2.3
+No match
+
+/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
+    1 IN SOA non-sp1 non-sp2(
+ 0: 1 IN SOA non-sp1 non-sp2(
+ 1: 1
+ 2: non-sp1
+ 3: non-sp2
+    1    IN    SOA    non-sp1    non-sp2   (
+ 0: 1    IN    SOA    non-sp1    non-sp2   (
+ 1: 1
+ 2: non-sp1
+ 3: non-sp2
+    *** Failers
+No match
+    1IN SOA non-sp1 non-sp2(
+No match
+
+/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
+    a.
+ 0: a.
+    Z.
+ 0: Z.
+    2.
+ 0: 2.
+    ab-c.pq-r.
+ 0: ab-c.pq-r.
+ 1: .pq-r
+    sxk.zzz.ac.uk.
+ 0: sxk.zzz.ac.uk.
+ 1: .uk
+    x-.y-.
+ 0: x-.y-.
+ 1: .y-
+    *** Failers
+No match
+    -abc.peq.
+No match
+
+/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
+    *.a
+ 0: *.a
+    *.b0-a
+ 0: *.b0-a
+ 1: 0-a
+    *.c3-b.c
+ 0: *.c3-b.c
+ 1: 3-b
+ 2: .c
+    *.c-a.b-c
+ 0: *.c-a.b-c
+ 1: -a
+ 2: .b-c
+ 3: -c
+    *** Failers
+No match
+    *.0
+No match
+    *.a-
+No match
+    *.a-b.c-
+No match
+    *.c-a.0-c
+No match
+
+/^(?=ab(de))(abd)(e)/
+    abde
+ 0: abde
+ 1: de
+ 2: abd
+ 3: e
+
+/^(?!(ab)de|x)(abd)(f)/
+    abdf
+ 0: abdf
+ 1: <unset>
+ 2: abd
+ 3: f
+
+/^(?=(ab(cd)))(ab)/
+    abcd
+ 0: ab
+ 1: abcd
+ 2: cd
+ 3: ab
+
+/^[\da-f](\.[\da-f])*$/i
+    a.b.c.d
+ 0: a.b.c.d
+ 1: .d
+    A.B.C.D
+ 0: A.B.C.D
+ 1: .D
+    a.b.c.1.2.3.C
+ 0: a.b.c.1.2.3.C
+ 1: .C
+
+/^\".*\"\s*(;.*)?$/
+    \"1234\"
+ 0: "1234"
+    \"abcd\" ;
+ 0: "abcd" ;
+ 1: ;
+    \"\" ; rhubarb
+ 0: "" ; rhubarb
+ 1: ; rhubarb
+    *** Failers
+No match
+    \"1234\" : things
+No match
+
+/^$/
+    \
+ 0: 
+    *** Failers
+No match
+
+/   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/x
+    ab c
+ 0: ab c
+    *** Failers
+No match
+    abc
+No match
+    ab cde
+No match
+
+/(?x)   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/
+    ab c
+ 0: ab c
+    *** Failers
+No match
+    abc
+No match
+    ab cde
+No match
+
+/^   a\ b[c ]d       $/x
+    a bcd
+ 0: a bcd
+    a b d
+ 0: a b d
+    *** Failers
+No match
+    abcd
+No match
+    ab d
+No match
+
+/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
+    abcdefhijklm
+ 0: abcdefhijklm
+ 1: abc
+ 2: bc
+ 3: c
+ 4: def
+ 5: ef
+ 6: f
+ 7: hij
+ 8: ij
+ 9: j
+10: klm
+11: lm
+12: m
+
+/^(?:a(b(c)))(?:d(e(f)))(?:h(i(j)))(?:k(l(m)))$/
+    abcdefhijklm
+ 0: abcdefhijklm
+ 1: bc
+ 2: c
+ 3: ef
+ 4: f
+ 5: ij
+ 6: j
+ 7: lm
+ 8: m
+
+/^[\w][\W][\s][\S][\d][\D][\b][\n][\c]][\022]/
+    a+ Z0+\x08\n\x1d\x12
+ 0: a+ Z0+\x08\x0a\x1d\x12
+
+/^[.^$|()*+?{,}]+/
+    .^\$(*+)|{?,?}
+ 0: .^$(*+)|{?,?}
+
+/^a*\w/
+    z
+ 0: z
+    az
+ 0: az
+    aaaz
+ 0: aaaz
+    a
+ 0: a
+    aa
+ 0: aa
+    aaaa
+ 0: aaaa
+    a+
+ 0: a
+    aa+
+ 0: aa
+
+/^a*?\w/
+    z
+ 0: z
+    az
+ 0: a
+    aaaz
+ 0: a
+    a
+ 0: a
+    aa
+ 0: a
+    aaaa
+ 0: a
+    a+
+ 0: a
+    aa+
+ 0: a
+
+/^a+\w/
+    az
+ 0: az
+    aaaz
+ 0: aaaz
+    aa
+ 0: aa
+    aaaa
+ 0: aaaa
+    aa+
+ 0: aa
+
+/^a+?\w/
+    az
+ 0: az
+    aaaz
+ 0: aa
+    aa
+ 0: aa
+    aaaa
+ 0: aa
+    aa+
+ 0: aa
+
+/^\d{8}\w{2,}/
+    1234567890
+ 0: 1234567890
+    12345678ab
+ 0: 12345678ab
+    12345678__
+ 0: 12345678__
+    *** Failers
+No match
+    1234567
+No match
+
+/^[aeiou\d]{4,5}$/
+    uoie
+ 0: uoie
+    1234
+ 0: 1234
+    12345
+ 0: 12345
+    aaaaa
+ 0: aaaaa
+    *** Failers
+No match
+    123456
+No match
+
+/^[aeiou\d]{4,5}?/
+    uoie
+ 0: uoie
+    1234
+ 0: 1234
+    12345
+ 0: 1234
+    aaaaa
+ 0: aaaa
+    123456
+ 0: 1234
+
+/\A(abc|def)=(\1){2,3}\Z/
+    abc=abcabc
+ 0: abc=abcabc
+ 1: abc
+ 2: abc
+    def=defdefdef
+ 0: def=defdefdef
+ 1: def
+ 2: def
+    *** Failers
+No match
+    abc=defdef
+No match
+
+/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
+    abcdefghijkcda2
+ 0: abcdefghijkcda2
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: cd
+    abcdefghijkkkkcda2
+ 0: abcdefghijkkkkcda2
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: cd
+
+/(cat(a(ract|tonic)|erpillar)) \1()2(3)/
+    cataract cataract23
+ 0: cataract cataract23
+ 1: cataract
+ 2: aract
+ 3: ract
+ 4: 
+ 5: 3
+    catatonic catatonic23
+ 0: catatonic catatonic23
+ 1: catatonic
+ 2: atonic
+ 3: tonic
+ 4: 
+ 5: 3
+    caterpillar caterpillar23
+ 0: caterpillar caterpillar23
+ 1: caterpillar
+ 2: erpillar
+ 3: <unset>
+ 4: 
+ 5: 3
+
+
+/^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/
+    From abcd  Mon Sep 01 12:33:02 1997
+ 0: From abcd  Mon Sep 01 12:33
+ 1: abcd
+
+/^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
+    From abcd  Mon Sep 01 12:33:02 1997
+ 0: From abcd  Mon Sep 01 12:33
+ 1: Sep 
+    From abcd  Mon Sep  1 12:33:02 1997
+ 0: From abcd  Mon Sep  1 12:33
+ 1: Sep  
+    *** Failers
+No match
+    From abcd  Sep 01 12:33:02 1997
+No match
+
+/^12.34/s
+    12\n34
+ 0: 12\x0a34
+    12\r34
+ 0: 12\x0d34
+
+/\w+(?=\t)/
+    the quick brown\t fox
+ 0: brown
+
+/foo(?!bar)(.*)/
+    foobar is foolish see?
+ 0: foolish see?
+ 1: lish see?
+
+/(?:(?!foo)...|^.{0,2})bar(.*)/
+    foobar crowbar etc
+ 0: rowbar etc
+ 1:  etc
+    barrel
+ 0: barrel
+ 1: rel
+    2barrel
+ 0: 2barrel
+ 1: rel
+    A barrel
+ 0: A barrel
+ 1: rel
+
+/^(\D*)(?=\d)(?!123)/
+    abc456
+ 0: abc
+ 1: abc
+    *** Failers
+No match
+    abc123
+No match
+
+/^1234(?# test newlines
+  inside)/
+    1234
+ 0: 1234
+
+/^1234 #comment in extended re
+  /x
+    1234
+ 0: 1234
+
+/#rhubarb
+  abcd/x
+    abcd
+ 0: abcd
+
+/^abcd#rhubarb/x
+    abcd
+ 0: abcd
+
+/^(a)\1{2,3}(.)/
+    aaab
+ 0: aaab
+ 1: a
+ 2: b
+    aaaab
+ 0: aaaab
+ 1: a
+ 2: b
+    aaaaab
+ 0: aaaaa
+ 1: a
+ 2: a
+    aaaaaab
+ 0: aaaaa
+ 1: a
+ 2: a
+
+/(?!^)abc/
+    the abc
+ 0: abc
+    *** Failers
+No match
+    abc
+No match
+
+/(?=^)abc/
+    abc
+ 0: abc
+    *** Failers
+No match
+    the abc
+No match
+
+/^[ab]{1,3}(ab*|b)/
+    aabbbbb
+ 0: aabb
+ 1: b
+
+/^[ab]{1,3}?(ab*|b)/
+    aabbbbb
+ 0: aabbbbb
+ 1: abbbbb
+
+/^[ab]{1,3}?(ab*?|b)/
+    aabbbbb
+ 0: aa
+ 1: a
+
+/^[ab]{1,3}(ab*?|b)/
+    aabbbbb
+ 0: aabb
+ 1: b
+
+/  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                          # optional leading comment
+(?:    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)                    # initial word
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)  )* # further okay, if led by a period
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+# address
+|                     #  or
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)             # one word, optionally followed by....
+(?:
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037]  |  # atom and space parts, or...
+\(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)       |  # comments, or...
+
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+# quoted strings
+)*
+<  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                     # leading <
+(?:  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  ,  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+)* # further okay, if led by comma
+:                                # closing colon
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  )? #       optional route
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)                    # initial word
+(?:  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+" (?:                      # opening quote...
+[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
+|                     #    or
+\\ [^\x80-\xff]           #   Escaped something (something != CR)
+)* "  # closing quote
+)  )* # further okay, if led by a period
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  @  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*    (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                           # initial subdomain
+(?:                                  #
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  \.                        # if led by a period...
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*   (?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|   \[                         # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
+\]                        #           ]
+)                     #   ...further okay
+)*
+#       address spec
+(?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*  > #                  trailing >
+# name and address
+)  (?: [\040\t] |  \(
+(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
+\)  )*                       # optional trailing comment
+/x
+    Alan Other <user\@dom.ain>
+ 0: Alan Other <user@dom.ain>
+    <user\@dom.ain>
+ 0: user@dom.ain
+    user\@dom.ain
+ 0: user@dom.ain
+    \"A. Other\" <user.1234\@dom.ain> (a comment)
+ 0: "A. Other" <user.1234@dom.ain> (a comment)
+    A. Other <user.1234\@dom.ain> (a comment)
+ 0:  Other <user.1234@dom.ain> (a comment)
+    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+ 0: "/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/"@x400-re.lay
+    A missing angle <user\@some.where
+ 0: user@some.where
+    *** Failers
+No match
+    The quick brown fox
+No match
+
+/[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional leading comment
+(?:
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# additional words
+)*
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+# address
+|                             #  or
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+# leading word
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *               # "normal" atoms and or spaces
+(?:
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+|
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+) # "special" comment or quoted string
+[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *            #  more "normal"
+)*
+<
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# <
+(?:
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+(?: ,
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+)*  # additional domains
+:
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)?     #       optional route
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+# Atom
+|                       #  or
+"                                     # "
+[^\\\x80-\xff\n\015"] *                            #   normal
+(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
+"                                     #        "
+# Quoted string
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# additional words
+)*
+@
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+(?:
+\.
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+(?:
+[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
+|
+\[                            # [
+(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
+\]                           #           ]
+)
+[\040\t]*                    # Nab whitespace.
+(?:
+\(                              #  (
+[^\\\x80-\xff\n\015()] *                             #     normal*
+(?:                                 #       (
+(?:  \\ [^\x80-\xff]  |
+\(                            #  (
+[^\\\x80-\xff\n\015()] *                            #     normal*
+(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
+\)                           #                       )
+)    #         special
+[^\\\x80-\xff\n\015()] *                         #         normal*
+)*                                  #            )*
+\)                             #                )
+[\040\t]* )*    # If comment found, allow more spaces.
+# optional trailing comments
+)*
+#       address spec
+>                    #                 >
+# name and address
+)
+/x
+    Alan Other <user\@dom.ain>
+ 0: Alan Other <user@dom.ain>
+    <user\@dom.ain>
+ 0: user@dom.ain
+    user\@dom.ain
+ 0: user@dom.ain
+    \"A. Other\" <user.1234\@dom.ain> (a comment)
+ 0: "A. Other" <user.1234@dom.ain>
+    A. Other <user.1234\@dom.ain> (a comment)
+ 0:  Other <user.1234@dom.ain>
+    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+ 0: "/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/"@x400-re.lay
+    A missing angle <user\@some.where
+ 0: user@some.where
+    *** Failers
+No match
+    The quick brown fox
+No match
+
+/abc\0def\00pqr\000xyz\0000AB/
+    abc\0def\00pqr\000xyz\0000AB
+ 0: abc\x00def\x00pqr\x00xyz\x000AB
+    abc456 abc\0def\00pqr\000xyz\0000ABCDE
+ 0: abc\x00def\x00pqr\x00xyz\x000AB
+
+/abc\x0def\x00pqr\x000xyz\x0000AB/
+    abc\x0def\x00pqr\x000xyz\x0000AB
+ 0: abc\x0def\x00pqr\x000xyz\x0000AB
+    abc456 abc\x0def\x00pqr\x000xyz\x0000ABCDE
+ 0: abc\x0def\x00pqr\x000xyz\x0000AB
+
+/^[\000-\037]/
+    \0A
+ 0: \x00
+    \01B
+ 0: \x01
+    \037C
+ 0: \x1f
+
+/\0*/
+    \0\0\0\0
+ 0: \x00\x00\x00\x00
+
+/A\x0{2,3}Z/
+    The A\x0\x0Z
+ 0: A\x00\x00Z
+    An A\0\x0\0Z
+ 0: A\x00\x00\x00Z
+    *** Failers
+No match
+    A\0Z
+No match
+    A\0\x0\0\x0Z
+No match
+
+/^(cow|)\1(bell)/
+    cowcowbell
+ 0: cowcowbell
+ 1: cow
+ 2: bell
+    bell
+ 0: bell
+ 1: 
+ 2: bell
+    *** Failers
+No match
+    cowbell
+No match
+
+/^\s/
+    \040abc
+ 0:  
+    \x0cabc
+ 0: \x0c
+    \nabc
+ 0: \x0a
+    \rabc
+ 0: \x0d
+    \tabc
+ 0: \x09
+    *** Failers
+No match
+    abc
+No match
+
+/^a	b
+  
    c/x
+    abc
+ 0: abc
+
+/^(a|)\1*b/
+    ab
+ 0: ab
+ 1: a
+    aaaab
+ 0: aaaab
+ 1: a
+    b
+ 0: b
+ 1: 
+    *** Failers
+No match
+    acb
+No match
+
+/^(a|)\1+b/
+    aab
+ 0: aab
+ 1: a
+    aaaab
+ 0: aaaab
+ 1: a
+    b
+ 0: b
+ 1: 
+    *** Failers
+No match
+    ab
+No match
+
+/^(a|)\1?b/
+    ab
+ 0: ab
+ 1: a
+    aab
+ 0: aab
+ 1: a
+    b
+ 0: b
+ 1: 
+    *** Failers
+No match
+    acb
+No match
+
+/^(a|)\1{2}b/
+    aaab
+ 0: aaab
+ 1: a
+    b
+ 0: b
+ 1: 
+    *** Failers
+No match
+    ab
+No match
+    aab
+No match
+    aaaab
+No match
+
+/^(a|)\1{2,3}b/
+    aaab
+ 0: aaab
+ 1: a
+    aaaab
+ 0: aaaab
+ 1: a
+    b
+ 0: b
+ 1: 
+    *** Failers
+No match
+    ab
+No match
+    aab
+No match
+    aaaaab
+No match
+
+/ab{1,3}bc/
+    abbbbc
+ 0: abbbbc
+    abbbc
+ 0: abbbc
+    abbc
+ 0: abbc
+    *** Failers
+No match
+    abc
+No match
+    abbbbbc
+No match
+
+/([^.]*)\.([^:]*):[T ]+(.*)/
+    track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/([^.]*)\.([^:]*):[T ]+(.*)/i
+    track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/([^.]*)\.([^:]*):[t ]+(.*)/i
+    track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/^[W-c]+$/
+    WXY_^abc
+ 0: WXY_^abc
+    *** Failers
+No match
+    wxy
+No match
+
+/^[W-c]+$/i
+    WXY_^abc
+ 0: WXY_^abc
+    wxy_^ABC
+ 0: wxy_^ABC
+
+/^[\x3f-\x5F]+$/i
+    WXY_^abc
+ 0: WXY_^abc
+    wxy_^ABC
+ 0: wxy_^ABC
+
+/^abc$/m
+    abc
+ 0: abc
+    qqq\nabc
+ 0: abc
+    abc\nzzz
+ 0: abc
+    qqq\nabc\nzzz
+ 0: abc
+
+/^abc$/
+    abc
+ 0: abc
+    *** Failers
+No match
+    qqq\nabc
+No match
+    abc\nzzz
+No match
+    qqq\nabc\nzzz
+No match
+
+/\Aabc\Z/m
+    abc
+ 0: abc
+    abc\n 
+ 0: abc
+    *** Failers
+No match
+    qqq\nabc
+No match
+    abc\nzzz
+No match
+    qqq\nabc\nzzz
+No match
+    
+/\A(.)*\Z/s
+    abc\ndef
+ 0: abc\x0adef
+ 1: f
+
+/\A(.)*\Z/m
+    *** Failers
+ 0: *** Failers
+ 1: s
+    abc\ndef
+No match
+
+/(?:b)|(?::+)/
+    b::c
+ 0: b
+    c::b
+ 0: ::
+
+/[-az]+/
+    az-
+ 0: az-
+    *** Failers
+ 0: a
+    b
+No match
+
+/[az-]+/
+    za-
+ 0: za-
+    *** Failers
+ 0: a
+    b
+No match
+
+/[a\-z]+/
+    a-z
+ 0: a-z
+    *** Failers
+ 0: a
+    b
+No match
+
+/[a-z]+/
+    abcdxyz
+ 0: abcdxyz
+
+/[\d-]+/
+    12-34
+ 0: 12-34
+    *** Failers
+No match
+    aaa
+No match
+
+/[\d-z]+/
+    12-34z
+ 0: 12-34z
+    *** Failers
+No match
+    aaa
+No match
+
+/\x5c/
+    \\
+ 0: \
+
+/\x20Z/
+    the Zoo
+ 0:  Z
+    *** Failers
+No match
+    Zulu
+No match
+
+/(abc)\1/i
+    abcabc
+ 0: abcabc
+ 1: abc
+    ABCabc
+ 0: ABCabc
+ 1: ABC
+    abcABC
+ 0: abcABC
+ 1: abc
+
+/ab{3cd/
+    ab{3cd
+ 0: ab{3cd
+
+/ab{3,cd/
+    ab{3,cd
+ 0: ab{3,cd
+
+/ab{3,4a}cd/
+    ab{3,4a}cd
+ 0: ab{3,4a}cd
+
+/{4,5a}bc/
+    {4,5a}bc
+ 0: {4,5a}bc
+
+/^a.b/
+    a\rb
+ 0: a\x0db
+    *** Failers
+No match
+    a\nb
+No match
+
+/abc$/
+    abc
+ 0: abc
+    abc\n
+ 0: abc
+    *** Failers
+No match
+    abc\ndef
+No match
+
+/(abc)\123/
+    abc\x53
+ 0: abcS
+ 1: abc
+
+/(abc)\223/
+    abc\x93
+ 0: abc\x93
+ 1: abc
+
+/(abc)\323/
+    abc\xd3
+ 0: abc\xd3
+ 1: abc
+
+/(abc)\500/
+    abc\x40
+ 0: abc@
+ 1: abc
+    abc\100
+ 0: abc@
+ 1: abc
+
+/(abc)\5000/
+    abc\x400
+ 0: abc@0
+ 1: abc
+    abc\x40\x30
+ 0: abc@0
+ 1: abc
+    abc\1000
+ 0: abc@0
+ 1: abc
+    abc\100\x30
+ 0: abc@0
+ 1: abc
+    abc\100\060
+ 0: abc@0
+ 1: abc
+    abc\100\60
+ 0: abc@0
+ 1: abc
+
+/abc\81/
+    abc\081
+ 0: abc\x0081
+    abc\0\x38\x31
+ 0: abc\x0081
+
+/abc\91/
+    abc\091
+ 0: abc\x0091
+    abc\0\x39\x31
+ 0: abc\x0091
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\12\123/
+    abcdefghijkllS
+ 0: abcdefghijkllS
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: l
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\12\123/
+    abcdefghijk\12S
+ 0: abcdefghijk\x0aS
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+
+/ab\gdef/
+    abgdef
+ 0: abgdef
+
+/a{0}bc/
+    bc
+ 0: bc
+
+/(a|(bc)){0,0}?xyz/
+    xyz
+ 0: xyz
+
+/abc[\10]de/
+    abc\010de
+ 0: abc\x08de
+
+/abc[\1]de/
+    abc\1de
+ 0: abc\x01de
+
+/(abc)[\1]de/
+    abc\1de
+ 0: abc\x01de
+ 1: abc
+
+/(?s)a.b/
+    a\nb
+ 0: a\x0ab
+
+/^([^a])([^\b])([^c]*)([^d]{3,4})/
+    baNOTccccd
+ 0: baNOTcccc
+ 1: b
+ 2: a
+ 3: NOT
+ 4: cccc
+    baNOTcccd
+ 0: baNOTccc
+ 1: b
+ 2: a
+ 3: NOT
+ 4: ccc
+    baNOTccd
+ 0: baNOTcc
+ 1: b
+ 2: a
+ 3: NO
+ 4: Tcc
+    bacccd
+ 0: baccc
+ 1: b
+ 2: a
+ 3: 
+ 4: ccc
+    *** Failers
+ 0: *** Failers
+ 1: *
+ 2: *
+ 3: * Fail
+ 4: ers
+    anything
+No match
+    b\bc   
+No match
+    baccd
+No match
+
+/[^a]/
+    Abc
+ 0: A
+  
+/[^a]/i
+    Abc 
+ 0: b
+
+/[^a]+/
+    AAAaAbc
+ 0: AAA
+  
+/[^a]+/i
+    AAAaAbc 
+ 0: bc
+
+/[^a]+/
+    bbb\nccc
+ 0: bbb\x0accc
+   
+/[^k]$/
+    abc
+ 0: c
+    *** Failers
+ 0: s
+    abk   
+No match
+   
+/[^k]{2,3}$/
+    abc
+ 0: abc
+    kbc
+ 0: bc
+    kabc 
+ 0: abc
+    *** Failers
+ 0: ers
+    abk
+No match
+    akb
+No match
+    akk 
+No match
+
+/^\d{8,}\@.+[^k]$/
+    12345678\@a.b.c.d
+ 0: 12345678@a.b.c.d
+    123456789\@x.y.z
+ 0: 123456789@x.y.z
+    *** Failers
+No match
+    12345678\@x.y.uk
+No match
+    1234567\@a.b.c.d       
+No match
+
+/(a)\1{8,}/
+    aaaaaaaaa
+ 0: aaaaaaaaa
+ 1: a
+    aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: a
+    *** Failers
+No match
+    aaaaaaa   
+No match
+
+/[^a]/
+    aaaabcd
+ 0: b
+    aaAabcd 
+ 0: A
+
+/[^a]/i
+    aaaabcd
+ 0: b
+    aaAabcd 
+ 0: b
+
+/[^az]/
+    aaaabcd
+ 0: b
+    aaAabcd 
+ 0: A
+
+/[^az]/i
+    aaaabcd
+ 0: b
+    aaAabcd 
+ 0: b
+
+/\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377/
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+
+/P[^*]TAIRE[^*]{1,6}?LL/
+    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+ 0: PSTAIREISLL
+
+/P[^*]TAIRE[^*]{1,}?LL/
+    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+ 0: PSTAIREISLL
+
+/(\.\d\d[1-9]?)\d+/
+    1.230003938
+ 0: .230003938
+ 1: .23
+    1.875000282   
+ 0: .875000282
+ 1: .875
+    1.235  
+ 0: .235
+ 1: .23
+                  
+/(\.\d\d((?=0)|\d(?=\d)))/
+    1.230003938      
+ 0: .23
+ 1: .23
+ 2: 
+    1.875000282
+ 0: .875
+ 1: .875
+ 2: 5
+    *** Failers 
+No match
+    1.235 
+No match
+    
+/a(?)b/
+    ab 
+ 0: ab
+ 
+/\b(foo)\s+(\w+)/i
+    Food is on the foo table
+ 0: foo table
+ 1: foo
+ 2: table
+    
+/foo(.*)bar/
+    The food is under the bar in the barn.
+ 0: food is under the bar in the bar
+ 1: d is under the bar in the 
+    
+/foo(.*?)bar/  
+    The food is under the bar in the barn.
+ 0: food is under the bar
+ 1: d is under the 
+
+/(.*)(\d*)/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 53147
+ 2: 
+    
+/(.*)(\d+)/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 5314
+ 2: 7
+ 
+/(.*?)(\d*)/
+    I have 2 numbers: 53147
+ 0: 
+ 1: 
+ 2: 
+
+/(.*?)(\d+)/
+    I have 2 numbers: 53147
+ 0: I have 2
+ 1: I have 
+ 2: 2
+
+/(.*)(\d+)$/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 5314
+ 2: 7
+
+/(.*?)(\d+)$/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 
+ 2: 53147
+
+/(.*)\b(\d+)$/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 
+ 2: 53147
+
+/(.*\D)(\d+)$/
+    I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 
+ 2: 53147
+
+/^\D*(?!123)/
+    ABC123
+ 0: AB
+     
+/^(\D*)(?=\d)(?!123)/
+    ABC445
+ 0: ABC
+ 1: ABC
+    *** Failers
+No match
+    ABC123
+No match
+    
+/^[W-]46]/
+    W46]789 
+ 0: W46]
+    -46]789
+ 0: -46]
+    *** Failers
+No match
+    Wall
+No match
+    Zebra
+No match
+    42
+No match
+    [abcd] 
+No match
+    ]abcd[
+No match
+       
+/^[W-\]46]/
+    W46]789 
+ 0: W
+    Wall
+ 0: W
+    Zebra
+ 0: Z
+    Xylophone  
+ 0: X
+    42
+ 0: 4
+    [abcd] 
+ 0: [
+    ]abcd[
+ 0: ]
+    \\backslash 
+ 0: \
+    *** Failers
+No match
+    -46]789
+No match
+    well
+No match
+    
+/\d\d\/\d\d\/\d\d\d\d/
+    01/01/2000
+ 0: 01/01/2000
+
+/word (?:[a-zA-Z0-9]+ ){0,10}otherword/
+  word cat dog elephant mussel cow horse canary baboon snake shark otherword
+ 0: word cat dog elephant mussel cow horse canary baboon snake shark otherword
+  word cat dog elephant mussel cow horse canary baboon snake shark
+No match
+
+/word (?:[a-zA-Z0-9]+ ){0,300}otherword/
+  word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
+No match
+
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+ 0: 
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+ 0: 
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+
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+    bcd
+ 0: 
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+ 1: a
+
+/^(a){0,}/
+    bcd
+ 0: 
+    abc
+ 0: a
+ 1: a
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+ 0: aa
+ 1: a
+    aaa
+ 0: aaa
+ 1: a
+    aaaaaaaa    
+ 0: aaaaaaaa
+ 1: a
+
+/^(a){1,1}/
+    bcd
+No match
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+ 0: a
+ 1: a
+    aab  
+ 0: a
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+/^(a){1,2}/
+    bcd
+No match
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+ 0: a
+ 1: a
+    aab  
+ 0: aa
+ 1: a
+
+/^(a){1,3}/
+    bcd
+No match
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+ 0: a
+ 1: a
+    aab
+ 0: aa
+ 1: a
+    aaa   
+ 0: aaa
+ 1: a
+
+/^(a){1,}/
+    bcd
+No match
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+ 0: a
+ 1: a
+    aab
+ 0: aa
+ 1: a
+    aaa
+ 0: aaa
+ 1: a
+    aaaaaaaa    
+ 0: aaaaaaaa
+ 1: a
+
+/.*\.gif/
+    borfle\nbib.gif\nno
+ 0: bib.gif
+
+/.{0,}\.gif/
+    borfle\nbib.gif\nno
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+
+/.*\.gif/m
+    borfle\nbib.gif\nno
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+/.*\.gif/s
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+/.*\.gif/ms
+    borfle\nbib.gif\nno
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+/.*$/
+    borfle\nbib.gif\nno
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+/.*$/m
+    borfle\nbib.gif\nno
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+/.*$/s
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+
+/.*$/ms
+    borfle\nbib.gif\nno
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+/.*$/
+    borfle\nbib.gif\nno\n
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+/.*$/m
+    borfle\nbib.gif\nno\n
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+/.*$/s
+    borfle\nbib.gif\nno\n
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+
+/.*$/ms
+    borfle\nbib.gif\nno\n
+ 0: borfle\x0abib.gif\x0ano\x0a
+    
+/(.*X|^B)/
+    abcde\n1234Xyz
+ 0: 1234X
+ 1: 1234X
+    BarFoo 
+ 0: B
+ 1: B
+    *** Failers
+No match
+    abcde\nBar  
+No match
+
+/(.*X|^B)/m
+    abcde\n1234Xyz
+ 0: 1234X
+ 1: 1234X
+    BarFoo 
+ 0: B
+ 1: B
+    abcde\nBar  
+ 0: B
+ 1: B
+
+/(.*X|^B)/s
+    abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+    BarFoo 
+ 0: B
+ 1: B
+    *** Failers
+No match
+    abcde\nBar  
+No match
+
+/(.*X|^B)/ms
+    abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+    BarFoo 
+ 0: B
+ 1: B
+    abcde\nBar  
+ 0: B
+ 1: B
+
+/(?s)(.*X|^B)/
+    abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+    BarFoo 
+ 0: B
+ 1: B
+    *** Failers 
+No match
+    abcde\nBar  
+No match
+
+/(?s:.*X|^B)/
+    abcde\n1234Xyz
+ 0: abcde\x0a1234X
+    BarFoo 
+ 0: B
+    *** Failers 
+No match
+    abcde\nBar  
+No match
+
+/^.*B/
+    **** Failers
+No match
+    abc\nB
+No match
+     
+/(?s)^.*B/
+    abc\nB
+ 0: abc\x0aB
+
+/(?m)^.*B/
+    abc\nB
+ 0: B
+     
+/(?ms)^.*B/
+    abc\nB
+ 0: abc\x0aB
+
+/(?ms)^B/
+    abc\nB
+ 0: B
+
+/(?s)B$/
+    B\n
+ 0: B
+
+/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]/
+    123456654321
+ 0: 123456654321
+  
+/^\d\d\d\d\d\d\d\d\d\d\d\d/
+    123456654321 
+ 0: 123456654321
+
+/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
+    123456654321
+ 0: 123456654321
+  
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+    abcabcabcabc
+ 0: abcabcabcabc
+    
+/^[a-c]{12}/
+    abcabcabcabc
+ 0: abcabcabcabc
+    
+/^(a|b|c){12}/
+    abcabcabcabc 
+ 0: abcabcabcabc
+ 1: c
+
+/^[abcdefghijklmnopqrstuvwxy0123456789]/
+    n
+ 0: n
+    *** Failers 
+No match
+    z 
+No match
+
+/abcde{0,0}/
+    abcd
+ 0: abcd
+    *** Failers
+No match
+    abce  
+No match
+
+/ab[cd]{0,0}e/
+    abe
+ 0: abe
+    *** Failers
+No match
+    abcde 
+No match
+    
+/ab(c){0,0}d/
+    abd
+ 0: abd
+    *** Failers
+No match
+    abcd   
+No match
+
+/a(b*)/
+    a
+ 0: a
+ 1: 
+    ab
+ 0: ab
+ 1: b
+    abbbb
+ 0: abbbb
+ 1: bbbb
+    *** Failers
+ 0: a
+ 1: 
+    bbbbb    
+No match
+    
+/ab\d{0}e/
+    abe
+ 0: abe
+    *** Failers
+No match
+    ab1e   
+No match
+    
+/"([^\\"]+|\\.)*"/
+    the \"quick\" brown fox
+ 0: "quick"
+ 1: quick
+    \"the \\\"quick\\\" brown fox\" 
+ 0: "the \"quick\" brown fox"
+ 1:  brown fox
+
+/.*?/g+
+    abc
+ 0: 
+ 0+ abc
+ 0: a
+ 0+ bc
+ 0: 
+ 0+ bc
+ 0: b
+ 0+ c
+ 0: 
+ 0+ c
+ 0: c
+ 0+ 
+ 0: 
+ 0+ 
+  
+/\b/g+
+    abc 
+ 0: 
+ 0+ abc
+ 0: 
+ 0+ 
+
+/\b/+g
+    abc 
+ 0: 
+ 0+ abc
+ 0: 
+ 0+ 
+
+//g
+    abc
+ 0: 
+ 0: 
+ 0: 
+ 0: 
+
+/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
+  <TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>
+ 0: <TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>
+ 1:  BGCOLOR='#DBE9E9'
+ 2:  align=left valign=top
+ 3: 43.
+ 4: <a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)
+ 5: 
+ 6: 
+ 7: <unset>
+ 8:  align=left valign=top
+ 9: Lega lstaff.com
+10:  align=left valign=top
+11: CA - Statewide
+
+/a[^a]b/
+    acb
+ 0: acb
+    a\nb
+ 0: a\x0ab
+    
+/a.b/
+    acb
+ 0: acb
+    *** Failers 
+No match
+    a\nb   
+No match
+    
+/a[^a]b/s
+    acb
+ 0: acb
+    a\nb  
+ 0: a\x0ab
+    
+/a.b/s
+    acb
+ 0: acb
+    a\nb  
+ 0: a\x0ab
+
+/^(b+?|a){1,2}?c/
+    bac
+ 0: bac
+ 1: a
+    bbac
+ 0: bbac
+ 1: a
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+ 1: a
+    bbbbac
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+    bbbbbac 
+ 0: bbbbbac
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+
+/^(b+|a){1,2}?c/
+    bac
+ 0: bac
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+ 1: a
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+ 0: bbbbac
+ 1: a
+    bbbbbac 
+ 0: bbbbbac
+ 1: a
+    
+/(?!\A)x/m
+    x\nb\n
+No match
+    a\bx\n  
+ 0: x
+    
+/\x0{ab}/
+    \0{ab} 
+ 0: \x00{ab}
+
+/(A|B)*?CD/
+    CD 
+ 0: CD
+    
+/(A|B)*CD/
+    CD 
+ 0: CD
+
+/(AB)*?\1/
+    ABABAB
+ 0: ABAB
+ 1: AB
+
+/(AB)*\1/
+    ABABAB
+ 0: ABABAB
+ 1: AB
+    
+/(?<!bar)foo/
+    foo
+ 0: foo
+    catfood
+ 0: foo
+    arfootle
+ 0: foo
+    rfoosh
+ 0: foo
+    *** Failers
+No match
+    barfoo
+No match
+    towbarfoo
+No match
+
+/\w{3}(?<!bar)foo/
+    catfood
+ 0: catfoo
+    *** Failers
+No match
+    foo
+No match
+    barfoo
+No match
+    towbarfoo
+No match
+
+/(?<=(foo)a)bar/
+    fooabar
+ 0: bar
+ 1: foo
+    *** Failers
+No match
+    bar
+No match
+    foobbar
+No match
+      
+/\Aabc\z/m
+    abc
+ 0: abc
+    *** Failers
+No match
+    abc\n   
+No match
+    qqq\nabc
+No match
+    abc\nzzz
+No match
+    qqq\nabc\nzzz
+No match
+
+"(?>.*/)foo"
+    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/
+No match
+
+"(?>.*/)foo"
+    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
+ 0: /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
+
+/(?>(\.\d\d[1-9]?))\d+/
+    1.230003938
+ 0: .230003938
+ 1: .23
+    1.875000282
+ 0: .875000282
+ 1: .875
+    *** Failers 
+No match
+    1.235 
+No match
+
+/^((?>\w+)|(?>\s+))*$/
+    now is the time for all good men to come to the aid of the party
+ 0: now is the time for all good men to come to the aid of the party
+ 1: party
+    *** Failers
+No match
+    this is not a line with only words and spaces!
+No match
+    
+/(\d+)(\w)/
+    12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+    12345+ 
+ 0: 12345
+ 1: 1234
+ 2: 5
+
+/((?>\d+))(\w)/
+    12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+    *** Failers
+No match
+    12345+ 
+No match
+
+/(?>a+)b/
+    aaab
+ 0: aaab
+
+/((?>a+)b)/
+    aaab
+ 0: aaab
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+
+/(?>(a+))b/
+    aaab
+ 0: aaab
+ 1: aaa
+
+/(?>b)+/
+    aaabbbccc
+ 0: bbb
+
+/(?>a+|b+|c+)*c/
+    aaabbbbccccd
+ 0: aaabbbbc
+
+/((?>[^()]+)|\([^()]*\))+/
+    ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+    
+/\(((?>[^()]+)|\([^()]+\))+\)/ 
+    (abc)
+ 0: (abc)
+ 1: abc
+    (abc(def)xyz)
+ 0: (abc(def)xyz)
+ 1: xyz
+    *** Failers
+No match
+    ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa   
+No match
+
+/a(?-i)b/i
+    ab
+ 0: ab
+    Ab
+ 0: Ab
+    *** Failers 
+No match
+    aB
+No match
+    AB
+No match
+        
+/(a (?x)b c)d e/
+    a bcd e
+ 0: a bcd e
+ 1: a bc
+    *** Failers
+No match
+    a b cd e
+No match
+    abcd e   
+No match
+    a bcde 
+No match
+ 
+/(a b(?x)c d (?-x)e f)/
+    a bcde f
+ 0: a bcde f
+ 1: a bcde f
+    *** Failers
+No match
+    abcdef  
+No match
+
+/(a(?i)b)c/
+    abc
+ 0: abc
+ 1: ab
+    aBc
+ 0: aBc
+ 1: aB
+    *** Failers
+No match
+    abC
+No match
+    aBC  
+No match
+    Abc
+No match
+    ABc
+No match
+    ABC
+No match
+    AbC
+No match
+    
+/a(?i:b)c/
+    abc
+ 0: abc
+    aBc
+ 0: aBc
+    *** Failers 
+No match
+    ABC
+No match
+    abC
+No match
+    aBC
+No match
+    
+/a(?i:b)*c/
+    aBc
+ 0: aBc
+    aBBc
+ 0: aBBc
+    *** Failers 
+No match
+    aBC
+No match
+    aBBC
+No match
+    
+/a(?=b(?i)c)\w\wd/
+    abcd
+ 0: abcd
+    abCd
+ 0: abCd
+    *** Failers
+No match
+    aBCd
+No match
+    abcD     
+No match
+    
+/(?s-i:more.*than).*million/i
+    more than million
+ 0: more than million
+    more than MILLION
+ 0: more than MILLION
+    more \n than Million 
+ 0: more \x0a than Million
+    *** Failers
+No match
+    MORE THAN MILLION    
+No match
+    more \n than \n million 
+No match
+
+/(?:(?s-i)more.*than).*million/i
+    more than million
+ 0: more than million
+    more than MILLION
+ 0: more than MILLION
+    more \n than Million 
+ 0: more \x0a than Million
+    *** Failers
+No match
+    MORE THAN MILLION    
+No match
+    more \n than \n million 
+No match
+    
+/(?>a(?i)b+)+c/ 
+    abc
+ 0: abc
+    aBbc
+ 0: aBbc
+    aBBc 
+ 0: aBBc
+    *** Failers
+No match
+    Abc
+No match
+    abAb    
+No match
+    abbC 
+No match
+    
+/(?=a(?i)b)\w\wc/
+    abc
+ 0: abc
+    aBc
+ 0: aBc
+    *** Failers
+No match
+    Ab 
+No match
+    abC
+No match
+    aBC     
+No match
+    
+/(?<=a(?i)b)(\w\w)c/
+    abxxc
+ 0: xxc
+ 1: xx
+    aBxxc
+ 0: xxc
+ 1: xx
+    *** Failers
+No match
+    Abxxc
+No match
+    ABxxc
+No match
+    abxxC      
+No match
+
+/(?:(a)|b)(?(1)A|B)/
+    aA
+ 0: aA
+ 1: a
+    bB
+ 0: bB
+    *** Failers
+No match
+    aB
+No match
+    bA    
+No match
+
+/^(a)?(?(1)a|b)+$/
+    aa
+ 0: aa
+ 1: a
+    b
+ 0: b
+    bb  
+ 0: bb
+    *** Failers
+No match
+    ab   
+No match
+
+/^(?(?=abc)\w{3}:|\d\d)$/
+    abc:
+ 0: abc:
+    12
+ 0: 12
+    *** Failers
+No match
+    123
+No match
+    xyz    
+No match
+
+/^(?(?!abc)\d\d|\w{3}:)$/
+    abc:
+ 0: abc:
+    12
+ 0: 12
+    *** Failers
+No match
+    123
+No match
+    xyz    
+No match
+    
+/(?(?<=foo)bar|cat)/
+    foobar
+ 0: bar
+    cat
+ 0: cat
+    fcat
+ 0: cat
+    focat   
+ 0: cat
+    *** Failers
+No match
+    foocat  
+No match
+
+/(?(?<!foo)cat|bar)/
+    foobar
+ 0: bar
+    cat
+ 0: cat
+    fcat
+ 0: cat
+    focat   
+ 0: cat
+    *** Failers
+No match
+    foocat  
+No match
+
+/( \( )? [^()]+ (?(1) \) |) /x
+    abcd
+ 0: abcd
+    (abcd)
+ 0: (abcd)
+ 1: (
+    the quick (abcd) fox
+ 0: the quick 
+    (abcd   
+ 0: abcd
+
+/( \( )? [^()]+ (?(1) \) ) /x
+    abcd
+ 0: abcd
+    (abcd)
+ 0: (abcd)
+ 1: (
+    the quick (abcd) fox
+ 0: the quick 
+    (abcd   
+ 0: abcd
+
+/^(?(2)a|(1)(2))+$/
+    12
+ 0: 12
+ 1: 1
+ 2: 2
+    12a
+ 0: 12a
+ 1: 1
+ 2: 2
+    12aa
+ 0: 12aa
+ 1: 1
+ 2: 2
+    *** Failers
+No match
+    1234    
+No match
+
+/((?i)blah)\s+\1/
+    blah blah
+ 0: blah blah
+ 1: blah
+    BLAH BLAH
+ 0: BLAH BLAH
+ 1: BLAH
+    Blah Blah
+ 0: Blah Blah
+ 1: Blah
+    blaH blaH
+ 0: blaH blaH
+ 1: blaH
+    *** Failers
+No match
+    blah BLAH
+No match
+    Blah blah      
+No match
+    blaH blah 
+No match
+
+/((?i)blah)\s+(?i:\1)/
+    blah blah
+ 0: blah blah
+ 1: blah
+    BLAH BLAH
+ 0: BLAH BLAH
+ 1: BLAH
+    Blah Blah
+ 0: Blah Blah
+ 1: Blah
+    blaH blaH
+ 0: blaH blaH
+ 1: blaH
+    blah BLAH
+ 0: blah BLAH
+ 1: blah
+    Blah blah      
+ 0: Blah blah
+ 1: Blah
+    blaH blah 
+ 0: blaH blah
+ 1: blaH
+
+/(?>a*)*/
+    a
+ 0: a
+    aa
+ 0: aa
+    aaaa
+ 0: aaaa
+    
+/(abc|)+/
+    abc
+ 0: abc
+ 1: 
+    abcabc
+ 0: abcabc
+ 1: 
+    abcabcabc
+ 0: abcabcabc
+ 1: 
+    xyz      
+ 0: 
+ 1: 
+
+/([a]*)*/
+    a
+ 0: a
+ 1: 
+    aaaaa 
+ 0: aaaaa
+ 1: 
+ 
+/([ab]*)*/
+    a
+ 0: a
+ 1: 
+    b
+ 0: b
+ 1: 
+    ababab
+ 0: ababab
+ 1: 
+    aaaabcde
+ 0: aaaab
+ 1: 
+    bbbb    
+ 0: bbbb
+ 1: 
+ 
+/([^a]*)*/
+    b
+ 0: b
+ 1: 
+    bbbb
+ 0: bbbb
+ 1: 
+    aaa   
+ 0: 
+ 1: 
+ 
+/([^ab]*)*/
+    cccc
+ 0: cccc
+ 1: 
+    abab  
+ 0: 
+ 1: 
+ 
+/([a]*?)*/
+    a
+ 0: 
+ 1: 
+    aaaa 
+ 0: 
+ 1: 
+ 
+/([ab]*?)*/
+    a
+ 0: 
+ 1: 
+    b
+ 0: 
+ 1: 
+    abab
+ 0: 
+ 1: 
+    baba   
+ 0: 
+ 1: 
+ 
+/([^a]*?)*/
+    b
+ 0: 
+ 1: 
+    bbbb
+ 0: 
+ 1: 
+    aaa   
+ 0: 
+ 1: 
+ 
+/([^ab]*?)*/
+    c
+ 0: 
+ 1: 
+    cccc
+ 0: 
+ 1: 
+    baba   
+ 0: 
+ 1: 
+ 
+/(?>a*)*/
+    a
+ 0: a
+    aaabcde 
+ 0: aaa
+ 
+/((?>a*))*/
+    aaaaa
+ 0: aaaaa
+ 1: 
+    aabbaa 
+ 0: aa
+ 1: 
+ 
+/((?>a*?))*/
+    aaaaa
+ 0: 
+ 1: 
+    aabbaa 
+ 0: 
+ 1: 
+
+/(?(?=[^a-z]+[a-z])  \d{2}-[a-z]{3}-\d{2}  |  \d{2}-\d{2}-\d{2} ) /x
+    12-sep-98
+ 0: 12-sep-98
+    12-09-98
+ 0: 12-09-98
+    *** Failers
+No match
+    sep-12-98
+No match
+        
+/(?<=(foo))bar\1/
+    foobarfoo
+ 0: barfoo
+ 1: foo
+    foobarfootling 
+ 0: barfoo
+ 1: foo
+    *** Failers
+No match
+    foobar
+No match
+    barfoo   
+No match
+
+/(?i:saturday|sunday)/
+    saturday
+ 0: saturday
+    sunday
+ 0: sunday
+    Saturday
+ 0: Saturday
+    Sunday
+ 0: Sunday
+    SATURDAY
+ 0: SATURDAY
+    SUNDAY
+ 0: SUNDAY
+    SunDay
+ 0: SunDay
+    
+/(a(?i)bc|BB)x/
+    abcx
+ 0: abcx
+ 1: abc
+    aBCx
+ 0: aBCx
+ 1: aBC
+    bbx
+ 0: bbx
+ 1: bb
+    BBx
+ 0: BBx
+ 1: BB
+    *** Failers
+No match
+    abcX
+No match
+    aBCX
+No match
+    bbX
+No match
+    BBX               
+No match
+
+/^([ab](?i)[cd]|[ef])/
+    ac
+ 0: ac
+ 1: ac
+    aC
+ 0: aC
+ 1: aC
+    bD
+ 0: bD
+ 1: bD
+    elephant
+ 0: e
+ 1: e
+    Europe 
+ 0: E
+ 1: E
+    frog
+ 0: f
+ 1: f
+    France
+ 0: F
+ 1: F
+    *** Failers
+No match
+    Africa     
+No match
+
+/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
+    ab
+ 0: ab
+ 1: ab
+    aBd
+ 0: aBd
+ 1: aBd
+    xy
+ 0: xy
+ 1: xy
+    xY
+ 0: xY
+ 1: xY
+    zebra
+ 0: z
+ 1: z
+    Zambesi
+ 0: Z
+ 1: Z
+    *** Failers
+No match
+    aCD  
+No match
+    XY  
+No match
+
+/(?<=foo\n)^bar/m
+    foo\nbar
+ 0: bar
+    *** Failers
+No match
+    bar
+No match
+    baz\nbar   
+No match
+
+/(?<=(?<!foo)bar)baz/
+    barbaz
+ 0: baz
+    barbarbaz 
+ 0: baz
+    koobarbaz 
+ 0: baz
+    *** Failers
+No match
+    baz
+No match
+    foobarbaz 
+No match
+
+/The case of aaaaaa is missed out below because I think Perl 5.005_02 gets/
+/it wrong; it sets $1 to aaa rather than aa. Compare the following test,/
+No match
+/where it does set $1 to aa when matching aaaaaa./
+No match
+
+/^(a\1?){4}$/
+    a
+No match
+    aa
+No match
+    aaa
+No match
+    aaaa
+ 0: aaaa
+ 1: a
+    aaaaa
+ 0: aaaaa
+ 1: a
+    aaaaaaa
+ 0: aaaaaaa
+ 1: a
+    aaaaaaaa
+No match
+    aaaaaaaaa
+No match
+    aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+    aaaaaaaaaaa
+No match
+    aaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaaaa               
+No match
+
+/^(a\1?)(a\1?)(a\2?)(a\3?)$/
+    a
+No match
+    aa
+No match
+    aaa
+No match
+    aaaa
+ 0: aaaa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+    aaaaa
+ 0: aaaaa
+ 1: a
+ 2: aa
+ 3: a
+ 4: a
+    aaaaaa
+ 0: aaaaaa
+ 1: a
+ 2: aa
+ 3: a
+ 4: aa
+    aaaaaaa
+ 0: aaaaaaa
+ 1: a
+ 2: aa
+ 3: aaa
+ 4: a
+    aaaaaaaa
+No match
+    aaaaaaaaa
+No match
+    aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: a
+ 2: aa
+ 3: aaa
+ 4: aaaa
+    aaaaaaaaaaa
+No match
+    aaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaaa
+No match
+    aaaaaaaaaaaaaaaa               
+No match
+
+/The following tests are taken from the Perl 5.005 test suite; some of them/
+/are compatible with 5.004, but I'd rather not have to sort them out./
+No match
+
+/abc/
+    abc
+ 0: abc
+    xabcy
+ 0: abc
+    ababc
+ 0: abc
+    *** Failers
+No match
+    xbc
+No match
+    axc
+No match
+    abx
+No match
+
+/ab*c/
+    abc
+ 0: abc
+
+/ab*bc/
+    abc
+ 0: abc
+    abbc
+ 0: abbc
+    abbbbc
+ 0: abbbbc
+
+/.{1}/
+    abbbbc
+ 0: a
+
+/.{3,4}/
+    abbbbc
+ 0: abbb
+
+/ab{0,}bc/
+    abbbbc
+ 0: abbbbc
+
+/ab+bc/
+    abbc
+ 0: abbc
+    *** Failers
+No match
+    abc
+No match
+    abq
+No match
+
+/ab{1,}bc/
+
+/ab+bc/
+    abbbbc
+ 0: abbbbc
+
+/ab{1,}bc/
+    abbbbc
+ 0: abbbbc
+
+/ab{1,3}bc/
+    abbbbc
+ 0: abbbbc
+
+/ab{3,4}bc/
+    abbbbc
+ 0: abbbbc
+
+/ab{4,5}bc/
+    *** Failers
+No match
+    abq
+No match
+    abbbbc
+No match
+
+/ab?bc/
+    abbc
+ 0: abbc
+    abc
+ 0: abc
+
+/ab{0,1}bc/
+    abc
+ 0: abc
+
+/ab?bc/
+
+/ab?c/
+    abc
+ 0: abc
+
+/ab{0,1}c/
+    abc
+ 0: abc
+
+/^abc$/
+    abc
+ 0: abc
+    *** Failers
+No match
+    abbbbc
+No match
+    abcc
+No match
+
+/^abc/
+    abcc
+ 0: abc
+
+/^abc$/
+
+/abc$/
+    aabc
+ 0: abc
+    *** Failers
+No match
+    aabc
+ 0: abc
+    aabcd
+No match
+
+/^/
+    abc
+ 0: 
+
+/$/
+    abc
+ 0: 
+
+/a.c/
+    abc
+ 0: abc
+    axc
+ 0: axc
+
+/a.*c/
+    axyzc
+ 0: axyzc
+
+/a[bc]d/
+    abd
+ 0: abd
+    *** Failers
+No match
+    axyzd
+No match
+    abc
+No match
+
+/a[b-d]e/
+    ace
+ 0: ace
+
+/a[b-d]/
+    aac
+ 0: ac
+
+/a[-b]/
+    a-
+ 0: a-
+
+/a[b-]/
+    a-
+ 0: a-
+
+/a]/
+    a]
+ 0: a]
+
+/a[]]b/
+    a]b
+ 0: a]b
+
+/a[^bc]d/
+    aed
+ 0: aed
+    *** Failers
+No match
+    abd
+No match
+    abd
+No match
+
+/a[^-b]c/
+    adc
+ 0: adc
+
+/a[^]b]c/
+    adc
+ 0: adc
+    *** Failers
+No match
+    a-c
+ 0: a-c
+    a]c
+No match
+
+/\ba\b/
+    a-
+ 0: a
+    -a
+ 0: a
+    -a-
+ 0: a
+
+/\by\b/
+    *** Failers
+No match
+    xy
+No match
+    yz
+No match
+    xyz
+No match
+
+/\Ba\B/
+    *** Failers
+ 0: a
+    a-
+No match
+    -a
+No match
+    -a-
+No match
+
+/\By\b/
+    xy
+ 0: y
+
+/\by\B/
+    yz
+ 0: y
+
+/\By\B/
+    xyz
+ 0: y
+
+/\w/
+    a
+ 0: a
+
+/\W/
+    -
+ 0: -
+    *** Failers
+ 0: *
+    -
+ 0: -
+    a
+No match
+
+/a\sb/
+    a b
+ 0: a b
+
+/a\Sb/
+    a-b
+ 0: a-b
+    *** Failers
+No match
+    a-b
+ 0: a-b
+    a b
+No match
+
+/\d/
+    1
+ 0: 1
+
+/\D/
+    -
+ 0: -
+    *** Failers
+ 0: *
+    -
+ 0: -
+    1
+No match
+
+/[\w]/
+    a
+ 0: a
+
+/[\W]/
+    -
+ 0: -
+    *** Failers
+ 0: *
+    -
+ 0: -
+    a
+No match
+
+/a[\s]b/
+    a b
+ 0: a b
+
+/a[\S]b/
+    a-b
+ 0: a-b
+    *** Failers
+No match
+    a-b
+ 0: a-b
+    a b
+No match
+
+/[\d]/
+    1
+ 0: 1
+
+/[\D]/
+    -
+ 0: -
+    *** Failers
+ 0: *
+    -
+ 0: -
+    1
+No match
+
+/ab|cd/
+    abc
+ 0: ab
+    abcd
+ 0: ab
+
+/()ef/
+    def
+ 0: ef
+ 1: 
+
+/$b/
+
+/a\(b/
+    a(b
+ 0: a(b
+
+/a\(*b/
+    ab
+ 0: ab
+    a((b
+ 0: a((b
+
+/a\\b/
+    a\b
+No match
+
+/((a))/
+    abc
+ 0: a
+ 1: a
+ 2: a
+
+/(a)b(c)/
+    abc
+ 0: abc
+ 1: a
+ 2: c
+
+/a+b+c/
+    aabbabc
+ 0: abc
+
+/a{1,}b{1,}c/
+    aabbabc
+ 0: abc
+
+/a.+?c/
+    abcabc
+ 0: abc
+
+/(a+|b)*/
+    ab
+ 0: ab
+ 1: b
+
+/(a+|b){0,}/
+    ab
+ 0: ab
+ 1: b
+
+/(a+|b)+/
+    ab
+ 0: ab
+ 1: b
+
+/(a+|b){1,}/
+    ab
+ 0: ab
+ 1: b
+
+/(a+|b)?/
+    ab
+ 0: a
+ 1: a
+
+/(a+|b){0,1}/
+    ab
+ 0: a
+ 1: a
+
+/[^ab]*/
+    cde
+ 0: cde
+
+/abc/
+    *** Failers
+No match
+    b
+No match
+    
+
+/a*/
+    
+
+/([abc])*d/
+    abbbcd
+ 0: abbbcd
+ 1: c
+
+/([abc])*bcd/
+    abcd
+ 0: abcd
+ 1: a
+
+/a|b|c|d|e/
+    e
+ 0: e
+
+/(a|b|c|d|e)f/
+    ef
+ 0: ef
+ 1: e
+
+/abcd*efg/
+    abcdefg
+ 0: abcdefg
+
+/ab*/
+    xabyabbbz
+ 0: ab
+    xayabbbz
+ 0: a
+
+/(ab|cd)e/
+    abcde
+ 0: cde
+ 1: cd
+
+/[abhgefdc]ij/
+    hij
+ 0: hij
+
+/^(ab|cd)e/
+
+/(abc|)ef/
+    abcdef
+ 0: ef
+ 1: 
+
+/(a|b)c*d/
+    abcd
+ 0: bcd
+ 1: b
+
+/(ab|ab*)bc/
+    abc
+ 0: abc
+ 1: a
+
+/a([bc]*)c*/
+    abc
+ 0: abc
+ 1: bc
+
+/a([bc]*)(c*d)/
+    abcd
+ 0: abcd
+ 1: bc
+ 2: d
+
+/a([bc]+)(c*d)/
+    abcd
+ 0: abcd
+ 1: bc
+ 2: d
+
+/a([bc]*)(c+d)/
+    abcd
+ 0: abcd
+ 1: b
+ 2: cd
+
+/a[bcd]*dcdcde/
+    adcdcde
+ 0: adcdcde
+
+/a[bcd]+dcdcde/
+    *** Failers
+No match
+    abcde
+No match
+    adcdcde
+No match
+
+/(ab|a)b*c/
+    abc
+ 0: abc
+ 1: ab
+
+/((a)(b)c)(d)/
+    abcd
+ 0: abcd
+ 1: abc
+ 2: a
+ 3: b
+ 4: d
+
+/[a-zA-Z_][a-zA-Z0-9_]*/
+    alpha
+ 0: alpha
+
+/^a(bc+|b[eh])g|.h$/
+    abh
+ 0: bh
+
+/(bc+d$|ef*g.|h?i(j|k))/
+    effgz
+ 0: effgz
+ 1: effgz
+    ij
+ 0: ij
+ 1: ij
+ 2: j
+    reffgz
+ 0: effgz
+ 1: effgz
+    *** Failers
+No match
+    effg
+No match
+    bcdd
+No match
+
+/((((((((((a))))))))))/
+    a
+ 0: a
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+
+/((((((((((a))))))))))\10/
+    aa
+ 0: aa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+
+/(((((((((a)))))))))/
+    a
+ 0: a
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+
+/multiple words of text/
+    *** Failers
+No match
+    aa
+No match
+    uh-uh
+No match
+
+/multiple words/
+    multiple words, yeah
+ 0: multiple words
+
+/(.*)c(.*)/
+    abcde
+ 0: abcde
+ 1: ab
+ 2: de
+
+/\((.*), (.*)\)/
+    (a, b)
+ 0: (a, b)
+ 1: a
+ 2: b
+
+/[k]/
+
+/abcd/
+    abcd
+ 0: abcd
+
+/a(bc)d/
+    abcd
+ 0: abcd
+ 1: bc
+
+/a[-]?c/
+    ac
+ 0: ac
+
+/(abc)\1/
+    abcabc
+ 0: abcabc
+ 1: abc
+
+/([a-c]*)\1/
+    abcabc
+ 0: abcabc
+ 1: abc
+
+/(a)|\1/
+    a
+ 0: a
+ 1: a
+    *** Failers
+ 0: a
+ 1: a
+    ab
+ 0: a
+ 1: a
+    x
+No match
+
+/(([a-c])b*?\2)*/
+    ababbbcbc
+ 0: ababb
+ 1: bb
+ 2: b
+
+/(([a-c])b*?\2){3}/
+    ababbbcbc
+ 0: ababbbcbc
+ 1: cbc
+ 2: c
+
+/((\3|b)\2(a)x)+/
+    aaaxabaxbaaxbbax
+ 0: bbax
+ 1: bbax
+ 2: b
+ 3: a
+
+/((\3|b)\2(a)){2,}/
+    bbaababbabaaaaabbaaaabba
+ 0: bbaaaabba
+ 1: bba
+ 2: b
+ 3: a
+
+/abc/i
+    ABC
+ 0: ABC
+    XABCY
+ 0: ABC
+    ABABC
+ 0: ABC
+    *** Failers
+No match
+    aaxabxbaxbbx
+No match
+    XBC
+No match
+    AXC
+No match
+    ABX
+No match
+
+/ab*c/i
+    ABC
+ 0: ABC
+
+/ab*bc/i
+    ABC
+ 0: ABC
+    ABBC
+ 0: ABBC
+
+/ab*?bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab{0,}?bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab+?bc/i
+    ABBC
+ 0: ABBC
+
+/ab+bc/i
+    *** Failers
+No match
+    ABC
+No match
+    ABQ
+No match
+
+/ab{1,}bc/i
+
+/ab+bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab{1,}?bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab{1,3}?bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab{3,4}?bc/i
+    ABBBBC
+ 0: ABBBBC
+
+/ab{4,5}?bc/i
+    *** Failers
+No match
+    ABQ
+No match
+    ABBBBC
+No match
+
+/ab??bc/i
+    ABBC
+ 0: ABBC
+    ABC
+ 0: ABC
+
+/ab{0,1}?bc/i
+    ABC
+ 0: ABC
+
+/ab??bc/i
+
+/ab??c/i
+    ABC
+ 0: ABC
+
+/ab{0,1}?c/i
+    ABC
+ 0: ABC
+
+/^abc$/i
+    ABC
+ 0: ABC
+    *** Failers
+No match
+    ABBBBC
+No match
+    ABCC
+No match
+
+/^abc/i
+    ABCC
+ 0: ABC
+
+/^abc$/i
+
+/abc$/i
+    AABC
+ 0: ABC
+
+/^/i
+    ABC
+ 0: 
+
+/$/i
+    ABC
+ 0: 
+
+/a.c/i
+    ABC
+ 0: ABC
+    AXC
+ 0: AXC
+
+/a.*?c/i
+    AXYZC
+ 0: AXYZC
+
+/a.*c/i
+    *** Failers
+No match
+    AABC
+ 0: AABC
+    AXYZD
+No match
+
+/a[bc]d/i
+    ABD
+ 0: ABD
+
+/a[b-d]e/i
+    ACE
+ 0: ACE
+    *** Failers
+No match
+    ABC
+No match
+    ABD
+No match
+
+/a[b-d]/i
+    AAC
+ 0: AC
+
+/a[-b]/i
+    A-
+ 0: A-
+
+/a[b-]/i
+    A-
+ 0: A-
+
+/a]/i
+    A]
+ 0: A]
+
+/a[]]b/i
+    A]B
+ 0: A]B
+
+/a[^bc]d/i
+    AED
+ 0: AED
+
+/a[^-b]c/i
+    ADC
+ 0: ADC
+    *** Failers
+No match
+    ABD
+No match
+    A-C
+No match
+
+/a[^]b]c/i
+    ADC
+ 0: ADC
+
+/ab|cd/i
+    ABC
+ 0: AB
+    ABCD
+ 0: AB
+
+/()ef/i
+    DEF
+ 0: EF
+ 1: 
+
+/$b/i
+    *** Failers
+No match
+    A]C
+No match
+    B
+No match
+
+/a\(b/i
+    A(B
+ 0: A(B
+
+/a\(*b/i
+    AB
+ 0: AB
+    A((B
+ 0: A((B
+
+/a\\b/i
+    A\B
+No match
+
+/((a))/i
+    ABC
+ 0: A
+ 1: A
+ 2: A
+
+/(a)b(c)/i
+    ABC
+ 0: ABC
+ 1: A
+ 2: C
+
+/a+b+c/i
+    AABBABC
+ 0: ABC
+
+/a{1,}b{1,}c/i
+    AABBABC
+ 0: ABC
+
+/a.+?c/i
+    ABCABC
+ 0: ABC
+
+/a.*?c/i
+    ABCABC
+ 0: ABC
+
+/a.{0,5}?c/i
+    ABCABC
+ 0: ABC
+
+/(a+|b)*/i
+    AB
+ 0: AB
+ 1: B
+
+/(a+|b){0,}/i
+    AB
+ 0: AB
+ 1: B
+
+/(a+|b)+/i
+    AB
+ 0: AB
+ 1: B
+
+/(a+|b){1,}/i
+    AB
+ 0: AB
+ 1: B
+
+/(a+|b)?/i
+    AB
+ 0: A
+ 1: A
+
+/(a+|b){0,1}/i
+    AB
+ 0: A
+ 1: A
+
+/(a+|b){0,1}?/i
+    AB
+ 0: 
+
+/[^ab]*/i
+    CDE
+ 0: CDE
+
+/abc/i
+
+/a*/i
+    
+
+/([abc])*d/i
+    ABBBCD
+ 0: ABBBCD
+ 1: C
+
+/([abc])*bcd/i
+    ABCD
+ 0: ABCD
+ 1: A
+
+/a|b|c|d|e/i
+    E
+ 0: E
+
+/(a|b|c|d|e)f/i
+    EF
+ 0: EF
+ 1: E
+
+/abcd*efg/i
+    ABCDEFG
+ 0: ABCDEFG
+
+/ab*/i
+    XABYABBBZ
+ 0: AB
+    XAYABBBZ
+ 0: A
+
+/(ab|cd)e/i
+    ABCDE
+ 0: CDE
+ 1: CD
+
+/[abhgefdc]ij/i
+    HIJ
+ 0: HIJ
+
+/^(ab|cd)e/i
+    ABCDE
+No match
+
+/(abc|)ef/i
+    ABCDEF
+ 0: EF
+ 1: 
+
+/(a|b)c*d/i
+    ABCD
+ 0: BCD
+ 1: B
+
+/(ab|ab*)bc/i
+    ABC
+ 0: ABC
+ 1: A
+
+/a([bc]*)c*/i
+    ABC
+ 0: ABC
+ 1: BC
+
+/a([bc]*)(c*d)/i
+    ABCD
+ 0: ABCD
+ 1: BC
+ 2: D
+
+/a([bc]+)(c*d)/i
+    ABCD
+ 0: ABCD
+ 1: BC
+ 2: D
+
+/a([bc]*)(c+d)/i
+    ABCD
+ 0: ABCD
+ 1: B
+ 2: CD
+
+/a[bcd]*dcdcde/i
+    ADCDCDE
+ 0: ADCDCDE
+
+/a[bcd]+dcdcde/i
+
+/(ab|a)b*c/i
+    ABC
+ 0: ABC
+ 1: AB
+
+/((a)(b)c)(d)/i
+    ABCD
+ 0: ABCD
+ 1: ABC
+ 2: A
+ 3: B
+ 4: D
+
+/[a-zA-Z_][a-zA-Z0-9_]*/i
+    ALPHA
+ 0: ALPHA
+
+/^a(bc+|b[eh])g|.h$/i
+    ABH
+ 0: BH
+
+/(bc+d$|ef*g.|h?i(j|k))/i
+    EFFGZ
+ 0: EFFGZ
+ 1: EFFGZ
+    IJ
+ 0: IJ
+ 1: IJ
+ 2: J
+    REFFGZ
+ 0: EFFGZ
+ 1: EFFGZ
+    *** Failers
+No match
+    ADCDCDE
+No match
+    EFFG
+No match
+    BCDD
+No match
+
+/((((((((((a))))))))))/i
+    A
+ 0: A
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+10: A
+
+/((((((((((a))))))))))\10/i
+    AA
+ 0: AA
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+10: A
+
+/(((((((((a)))))))))/i
+    A
+ 0: A
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))/i
+    A
+ 0: A
+ 1: A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/i
+    C
+ 0: C
+ 1: C
+
+/multiple words of text/i
+    *** Failers
+No match
+    AA
+No match
+    UH-UH
+No match
+
+/multiple words/i
+    MULTIPLE WORDS, YEAH
+ 0: MULTIPLE WORDS
+
+/(.*)c(.*)/i
+    ABCDE
+ 0: ABCDE
+ 1: AB
+ 2: DE
+
+/\((.*), (.*)\)/i
+    (A, B)
+ 0: (A, B)
+ 1: A
+ 2: B
+
+/[k]/i
+
+/abcd/i
+    ABCD
+ 0: ABCD
+
+/a(bc)d/i
+    ABCD
+ 0: ABCD
+ 1: BC
+
+/a[-]?c/i
+    AC
+ 0: AC
+
+/(abc)\1/i
+    ABCABC
+ 0: ABCABC
+ 1: ABC
+
+/([a-c]*)\1/i
+    ABCABC
+ 0: ABCABC
+ 1: ABC
+
+/a(?!b)./
+    abad
+ 0: ad
+
+/a(?=d)./
+    abad
+ 0: ad
+
+/a(?=c|d)./
+    abad
+ 0: ad
+
+/a(?:b|c|d)(.)/
+    ace
+ 0: ace
+ 1: e
+
+/a(?:b|c|d)*(.)/
+    ace
+ 0: ace
+ 1: e
+
+/a(?:b|c|d)+?(.)/
+    ace
+ 0: ace
+ 1: e
+    acdbcdbe
+ 0: acd
+ 1: d
+
+/a(?:b|c|d)+(.)/
+    acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){2}(.)/
+    acdbcdbe
+ 0: acdb
+ 1: b
+
+/a(?:b|c|d){4,5}(.)/
+    acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|c|d){4,5}?(.)/
+    acdbcdbe
+ 0: acdbcd
+ 1: d
+
+/((foo)|(bar))*/
+    foobar
+ 0: foobar
+ 1: bar
+ 2: foo
+ 3: bar
+
+/a(?:b|c|d){6,7}(.)/
+    acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){6,7}?(.)/
+    acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,6}(.)/
+    acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,6}?(.)/
+    acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|c|d){5,7}(.)/
+    acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,7}?(.)/
+    acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|(c|e){1,2}?|d)+?(.)/
+    ace
+ 0: ace
+ 1: c
+ 2: e
+
+/^(.+)?B/
+    AB
+ 0: AB
+ 1: A
+
+/^([^a-z])|(\^)$/
+    .
+ 0: .
+ 1: .
+
+/^[<>]&/
+    <&OUT
+ 0: <&
+
+/^(a\1?){4}$/
+    aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+    *** Failers
+No match
+    AB
+No match
+    aaaaaaaaa
+No match
+    aaaaaaaaaaa
+No match
+
+/^(a(?(1)\1)){4}$/
+    aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+    *** Failers
+No match
+    aaaaaaaaa
+No match
+    aaaaaaaaaaa
+No match
+
+/(?:(f)(o)(o)|(b)(a)(r))*/
+    foobar
+ 0: foobar
+ 1: f
+ 2: o
+ 3: o
+ 4: b
+ 5: a
+ 6: r
+
+/(?<=a)b/
+    ab
+ 0: b
+    *** Failers
+No match
+    cb
+No match
+    b
+No match
+
+/(?<!c)b/
+    ab
+ 0: b
+    b
+ 0: b
+    b
+ 0: b
+
+/(?:..)*a/
+    aba
+ 0: aba
+
+/(?:..)*?a/
+    aba
+ 0: a
+
+/^(?:b|a(?=(.)))*\1/
+    abc
+ 0: ab
+ 1: b
+
+/^(){3,5}/
+    abc
+ 0: 
+ 1: 
+
+/^(a+)*ax/
+    aax
+ 0: aax
+ 1: a
+
+/^((a|b)+)*ax/
+    aax
+ 0: aax
+ 1: a
+ 2: a
+
+/^((a|bc)+)*ax/
+    aax
+ 0: aax
+ 1: a
+ 2: a
+
+/(a|x)*ab/
+    cab
+ 0: ab
+
+/(a)*ab/
+    cab
+ 0: ab
+
+/(?:(?i)a)b/
+    ab
+ 0: ab
+
+/((?i)a)b/
+    ab
+ 0: ab
+ 1: a
+
+/(?:(?i)a)b/
+    Ab
+ 0: Ab
+
+/((?i)a)b/
+    Ab
+ 0: Ab
+ 1: A
+
+/(?:(?i)a)b/
+    *** Failers
+No match
+    cb
+No match
+    aB
+No match
+
+/((?i)a)b/
+
+/(?i:a)b/
+    ab
+ 0: ab
+
+/((?i:a))b/
+    ab
+ 0: ab
+ 1: a
+
+/(?i:a)b/
+    Ab
+ 0: Ab
+
+/((?i:a))b/
+    Ab
+ 0: Ab
+ 1: A
+
+/(?i:a)b/
+    *** Failers
+No match
+    aB
+No match
+    aB
+No match
+
+/((?i:a))b/
+
+/(?:(?-i)a)b/i
+    ab
+ 0: ab
+
+/((?-i)a)b/i
+    ab
+ 0: ab
+ 1: a
+
+/(?:(?-i)a)b/i
+    aB
+ 0: aB
+
+/((?-i)a)b/i
+    aB
+ 0: aB
+ 1: a
+
+/(?:(?-i)a)b/i
+    *** Failers
+No match
+    aB
+ 0: aB
+    Ab
+No match
+
+/((?-i)a)b/i
+
+/(?:(?-i)a)b/i
+    aB
+ 0: aB
+
+/((?-i)a)b/i
+    aB
+ 0: aB
+ 1: a
+
+/(?:(?-i)a)b/i
+    *** Failers
+No match
+    Ab
+No match
+    AB
+No match
+
+/((?-i)a)b/i
+
+/(?-i:a)b/i
+    ab
+ 0: ab
+
+/((?-i:a))b/i
+    ab
+ 0: ab
+ 1: a
+
+/(?-i:a)b/i
+    aB
+ 0: aB
+
+/((?-i:a))b/i
+    aB
+ 0: aB
+ 1: a
+
+/(?-i:a)b/i
+    *** Failers
+No match
+    AB
+No match
+    Ab
+No match
+
+/((?-i:a))b/i
+
+/(?-i:a)b/i
+    aB
+ 0: aB
+
+/((?-i:a))b/i
+    aB
+ 0: aB
+ 1: a
+
+/(?-i:a)b/i
+    *** Failers
+No match
+    Ab
+No match
+    AB
+No match
+
+/((?-i:a))b/i
+
+/((?-i:a.))b/i
+    *** Failers
+No match
+    AB
+No match
+    a\nB
+No match
+
+/((?s-i:a.))b/i
+    a\nB
+ 0: a\x0aB
+ 1: a\x0a
+
+/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
+    cabbbb
+ 0: cabbbb
+
+/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
+    caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+ 0: caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+
+/(ab)\d\1/i
+    Ab4ab
+ 0: Ab4ab
+ 1: Ab
+    ab4Ab
+ 0: ab4Ab
+ 1: ab
+
+/foo\w*\d{4}baz/
+    foobar1234baz
+ 0: foobar1234baz
+
+/x(~~)*(?:(?:F)?)?/
+    x~~
+ 0: x~~
+ 1: ~~
+
+/^a(?#xxx){3}c/
+    aaac
+ 0: aaac
+
+/^a (?#xxx) (?#yyy) {3}c/x
+    aaac
+ 0: aaac
+
+/(?<![cd])b/
+    *** Failers
+No match
+    B\nB
+No match
+    dbcb
+No match
+
+/(?<![cd])[ab]/
+    dbaacb
+ 0: a
+
+/(?<!(c|d))b/
+
+/(?<!(c|d))[ab]/
+    dbaacb
+ 0: a
+
+/(?<!cd)[ab]/
+    cdaccb
+ 0: b
+
+/^(?:a?b?)*$/
+    *** Failers
+No match
+    dbcb
+No match
+    a--
+No match
+
+/((?s)^a(.))((?m)^b$)/
+    a\nb\nc\n
+ 0: a\x0ab
+ 1: a\x0a
+ 2: \x0a
+ 3: b
+
+/((?m)^b$)/
+    a\nb\nc\n
+ 0: b
+ 1: b
+
+/(?m)^b/
+    a\nb\n
+ 0: b
+
+/(?m)^(b)/
+    a\nb\n
+ 0: b
+ 1: b
+
+/((?m)^b)/
+    a\nb\n
+ 0: b
+ 1: b
+
+/\n((?m)^b)/
+    a\nb\n
+ 0: \x0ab
+ 1: b
+
+/((?s).)c(?!.)/
+    a\nb\nc\n
+ 0: \x0ac
+ 1: \x0a
+    a\nb\nc\n
+ 0: \x0ac
+ 1: \x0a
+
+/((?s)b.)c(?!.)/
+    a\nb\nc\n
+ 0: b\x0ac
+ 1: b\x0a
+    a\nb\nc\n
+ 0: b\x0ac
+ 1: b\x0a
+
+/^b/
+
+/()^b/
+    *** Failers
+No match
+    a\nb\nc\n
+No match
+    a\nb\nc\n
+No match
+
+/((?m)^b)/
+    a\nb\nc\n
+ 0: b
+ 1: b
+
+/(?(1)a|b)/
+
+/(?(1)b|a)/
+    a
+ 0: a
+
+/(x)?(?(1)a|b)/
+    *** Failers
+No match
+    a
+No match
+    a
+No match
+
+/(x)?(?(1)b|a)/
+    a
+ 0: a
+
+/()?(?(1)b|a)/
+    a
+ 0: a
+
+/()(?(1)b|a)/
+
+/()?(?(1)a|b)/
+    a
+ 0: a
+ 1: 
+
+/^(\()?blah(?(1)(\)))$/
+    (blah)
+ 0: (blah)
+ 1: (
+ 2: )
+    blah
+ 0: blah
+    *** Failers
+No match
+    a
+No match
+    blah)
+No match
+    (blah
+No match
+
+/^(\(+)?blah(?(1)(\)))$/
+    (blah)
+ 0: (blah)
+ 1: (
+ 2: )
+    blah
+ 0: blah
+    *** Failers
+No match
+    blah)
+No match
+    (blah
+No match
+
+/(?(?!a)a|b)/
+
+/(?(?!a)b|a)/
+    a
+ 0: a
+
+/(?(?=a)b|a)/
+    *** Failers
+No match
+    a
+No match
+    a
+No match
+
+/(?(?=a)a|b)/
+    a
+ 0: a
+
+/(?=(a+?))(\1ab)/
+    aaab
+ 0: aab
+ 1: a
+ 2: aab
+
+/^(?=(a+?))\1ab/
+
+/(\w+:)+/
+    one:
+ 0: one:
+ 1: one:
+
+/$(?<=^(a))/
+    a
+ 0: 
+ 1: a
+
+/(?=(a+?))(\1ab)/
+    aaab
+ 0: aab
+ 1: a
+ 2: aab
+
+/^(?=(a+?))\1ab/
+    *** Failers
+No match
+    aaab
+No match
+    aaab
+No match
+
+/([\w:]+::)?(\w+)$/
+    abcd
+ 0: abcd
+ 1: <unset>
+ 2: abcd
+    xy:z:::abcd
+ 0: xy:z:::abcd
+ 1: xy:z:::
+ 2: abcd
+
+/^[^bcd]*(c+)/
+    aexycd
+ 0: aexyc
+ 1: c
+
+/(a*)b+/
+    caab
+ 0: aab
+ 1: aa
+
+/([\w:]+::)?(\w+)$/
+    abcd
+ 0: abcd
+ 1: <unset>
+ 2: abcd
+    xy:z:::abcd
+ 0: xy:z:::abcd
+ 1: xy:z:::
+ 2: abcd
+    *** Failers
+ 0: Failers
+ 1: <unset>
+ 2: Failers
+    abcd:
+No match
+    abcd:
+No match
+
+/^[^bcd]*(c+)/
+    aexycd
+ 0: aexyc
+ 1: c
+
+/(>a+)ab/
+
+/(?>a+)b/
+    aaab
+ 0: aaab
+
+/([[:]+)/
+    a:[b]:
+ 0: :[
+ 1: :[
+
+/([[=]+)/
+    a=[b]=
+ 0: =[
+ 1: =[
+
+/([[.]+)/
+    a.[b].
+ 0: .[
+ 1: .[
+
+/((?>a+)b)/
+    aaab
+ 0: aaab
+ 1: aaab
+
+/(?>(a+))b/
+    aaab
+ 0: aaab
+ 1: aaa
+
+/((?>[^()]+)|\([^()]*\))+/
+    ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+
+/a\Z/
+    *** Failers
+No match
+    aaab
+No match
+    a\nb\n
+No match
+
+/b\Z/
+    a\nb\n
+ 0: b
+
+/b\z/
+
+/b\Z/
+    a\nb
+ 0: b
+
+/b\z/
+    a\nb
+ 0: b
+    *** Failers
+No match
+    
+/^(?>(?(1)\.|())[^\W_](?>[a-z0-9-]*[^\W_])?)+$/
+    a
+ 0: a
+ 1: 
+    abc
+ 0: abc
+ 1: 
+    a-b
+ 0: a-b
+ 1: 
+    0-9 
+ 0: 0-9
+ 1: 
+    a.b
+ 0: a.b
+ 1: 
+    5.6.7  
+ 0: 5.6.7
+ 1: 
+    the.quick.brown.fox
+ 0: the.quick.brown.fox
+ 1: 
+    a100.b200.300c  
+ 0: a100.b200.300c
+ 1: 
+    12-ab.1245 
+ 0: 12-ab.1245
+ 1: 
+    *** Failers
+No match
+    \
+No match
+    .a
+No match
+    -a
+No match
+    a-
+No match
+    a.  
+No match
+    a_b 
+No match
+    a.-
+No match
+    a..  
+No match
+    ab..bc 
+No match
+    the.quick.brown.fox-
+No match
+    the.quick.brown.fox.
+No match
+    the.quick.brown.fox_
+No match
+    the.quick.brown.fox+       
+No match
+
+/(?>.*)(?<=(abcd|wxyz))/
+    alphabetabcd
+ 0: alphabetabcd
+ 1: abcd
+    endingwxyz
+ 0: endingwxyz
+ 1: wxyz
+    *** Failers
+No match
+    a rather long string that doesn't end with one of them
+No match
+
+/word (?>(?:(?!otherword)[a-zA-Z0-9]+ ){0,30})otherword/
+    word cat dog elephant mussel cow horse canary baboon snake shark otherword
+ 0: word cat dog elephant mussel cow horse canary baboon snake shark otherword
+    word cat dog elephant mussel cow horse canary baboon snake shark
+No match
+  
+/word (?>[a-zA-Z0-9]+ ){0,30}otherword/
+    word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
+No match
+
+/(?<=\d{3}(?!999))foo/
+    999foo
+ 0: foo
+    123999foo 
+ 0: foo
+    *** Failers
+No match
+    123abcfoo
+No match
+    
+/(?<=(?!...999)\d{3})foo/
+    999foo
+ 0: foo
+    123999foo 
+ 0: foo
+    *** Failers
+No match
+    123abcfoo
+No match
+
+/(?<=\d{3}(?!999)...)foo/
+    123abcfoo
+ 0: foo
+    123456foo 
+ 0: foo
+    *** Failers
+No match
+    123999foo  
+No match
+    
+/(?<=\d{3}...)(?<!999)foo/
+    123abcfoo   
+ 0: foo
+    123456foo 
+ 0: foo
+    *** Failers
+No match
+    123999foo  
+No match
+
+/<a[\s]+href[\s]*=[\s]*          # find <a href=
+ ([\"\'])?                       # find single or double quote
+ (?(1) (.*?)\1 | ([^\s]+))       # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+    <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+    <a href=\'abcd xyz pqr\' cats
+ 0: <a href='abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/<a\s+href\s*=\s*                # find <a href=
+ (["'])?                         # find single or double quote
+ (?(1) (.*?)\1 | (\S+))          # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+    <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+    <a href       =       \'abcd xyz pqr\' cats
+ 0: <a href       =       'abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/<a\s+href(?>\s*)=(?>\s*)        # find <a href=
+ (["'])?                         # find single or double quote
+ (?(1) (.*?)\1 | (\S+))          # if quote found, match up to next matching
+                                 # quote, otherwise match up to next space
+/isx
+    <a href=abcd xyz
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+    <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+    <a href       =       \'abcd xyz pqr\' cats
+ 0: <a href       =       'abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/((Z)+|A)*/
+    ZABCDEFG
+ 0: ZA
+ 1: A
+ 2: Z
+
+/(Z()|A)*/
+    ZABCDEFG
+ 0: ZA
+ 1: A
+ 2: 
+
+/(Z(())|A)*/
+    ZABCDEFG
+ 0: ZA
+ 1: A
+ 2: 
+ 3: 
+
+/((?>Z)+|A)*/
+    ZABCDEFG
+ 0: ZA
+ 1: A
+
+/((?>)+|A)*/
+    ZABCDEFG
+ 0: 
+ 1: 
+
+/a*/g
+    abbab
+ 0: a
+ 0: 
+ 0: 
+ 0: a
+ 0: 
+ 0: 
+
+/^[a-\d]/
+    abcde
+ 0: a
+    -things
+ 0: -
+    0digit
+ 0: 0
+    *** Failers
+No match
+    bcdef    
+No match
+
+/^[\d-a]/
+    abcde
+ 0: a
+    -things
+ 0: -
+    0digit
+ 0: 0
+    *** Failers
+No match
+    bcdef    
+No match
+    
+/[[:space:]]+/
+    > \x09\x0a\x0c\x0d\x0b<
+ 0:  \x09\x0a\x0c\x0d\x0b
+     
+/[[:blank:]]+/
+    > \x09\x0a\x0c\x0d\x0b<
+ 0:  \x09
+     
+/[\s]+/
+    > \x09\x0a\x0c\x0d\x0b<
+ 0:  \x09\x0a\x0c\x0d
+     
+/\s+/
+    > \x09\x0a\x0c\x0d\x0b<
+ 0:  \x09\x0a\x0c\x0d
+     
+/ab/x
+    ab
+No match
+
+/(?!\A)x/m
+  a\nxb\n
+ 0: x
+
+/(?!^)x/m
+  a\nxb\n
+No match
+
+/abc\Qabc\Eabc/
+    abcabcabc
+ 0: abcabcabc
+    
+/abc\Q(*+|\Eabc/
+    abc(*+|abc 
+ 0: abc(*+|abc
+
+/   abc\Q abc\Eabc/x
+    abc abcabc
+ 0: abc abcabc
+    *** Failers
+No match
+    abcabcabc  
+No match
+    
+/abc#comment
+    \Q#not comment
+    literal\E/x
+    abc#not comment\n    literal     
+ 0: abc#not comment\x0a    literal
+
+/abc#comment
+    \Q#not comment
+    literal/x
+    abc#not comment\n    literal     
+ 0: abc#not comment\x0a    literal
+
+/abc#comment
+    \Q#not comment
+    literal\E #more comment
+    /x
+    abc#not comment\n    literal     
+ 0: abc#not comment\x0a    literal
+
+/abc#comment
+    \Q#not comment
+    literal\E #more comment/x
+    abc#not comment\n    literal     
+ 0: abc#not comment\x0a    literal
+
+/\Qabc\$xyz\E/
+    abc\\\$xyz
+ 0: abc\$xyz
+
+/\Qabc\E\$\Qxyz\E/
+    abc\$xyz
+ 0: abc$xyz
+
+/\Gabc/
+    abc
+ 0: abc
+    *** Failers
+No match
+    xyzabc  
+No match
+
+/\Gabc./g
+    abc1abc2xyzabc3
+ 0: abc1
+ 0: abc2
+
+/abc./g
+    abc1abc2xyzabc3 
+ 0: abc1
+ 0: abc2
+ 0: abc3
+
+/a(?x: b c )d/
+    XabcdY
+ 0: abcd
+    *** Failers 
+No match
+    Xa b c d Y 
+No match
+
+/((?x)x y z | a b c)/
+    XabcY
+ 0: abc
+ 1: abc
+    AxyzB 
+ 0: xyz
+ 1: xyz
+
+/(?i)AB(?-i)C/
+    XabCY
+ 0: abC
+    *** Failers
+No match
+    XabcY  
+No match
+
+/((?i)AB(?-i)C|D)E/
+    abCE
+ 0: abCE
+ 1: abC
+    DE
+ 0: DE
+ 1: D
+    *** Failers
+No match
+    abcE
+No match
+    abCe  
+No match
+    dE
+No match
+    De    
+No match
+
+/(.*)\d+\1/
+    abc123abc
+ 0: abc123abc
+ 1: abc
+    abc123bc 
+ 0: bc123bc
+ 1: bc
+
+/(.*)\d+\1/s
+    abc123abc
+ 0: abc123abc
+ 1: abc
+    abc123bc 
+ 0: bc123bc
+ 1: bc
+    
+/((.*))\d+\1/
+    abc123abc
+ 0: abc123abc
+ 1: abc
+ 2: abc
+    abc123bc  
+ 0: bc123bc
+ 1: bc
+ 2: bc
+
+/-- This tests for an IPv6 address in the form where it can have up to --/
+/-- eight components, one and only one of which is empty. This must be --/
+No match
+/-- an internal component. --/
+No match
+
+/^(?!:)                       # colon disallowed at start
+  (?:                         # start of item
+    (?: [0-9a-f]{1,4} |       # 1-4 hex digits or
+    (?(1)0 | () ) )           # if null previously matched, fail; else null
+    :                         # followed by colon
+  ){1,7}                      # end item; 1-7 of them required               
+  [0-9a-f]{1,4} $             # final hex number at end of string
+  (?(1)|.)                    # check that there was an empty component
+  /xi
+    a123::a123
+ 0: a123::a123
+ 1: 
+    a123:b342::abcd
+ 0: a123:b342::abcd
+ 1: 
+    a123:b342::324e:abcd
+ 0: a123:b342::324e:abcd
+ 1: 
+    a123:ddde:b342::324e:abcd
+ 0: a123:ddde:b342::324e:abcd
+ 1: 
+    a123:ddde:b342::324e:dcba:abcd
+ 0: a123:ddde:b342::324e:dcba:abcd
+ 1: 
+    a123:ddde:9999:b342::324e:dcba:abcd
+ 0: a123:ddde:9999:b342::324e:dcba:abcd
+ 1: 
+    *** Failers
+No match
+    1:2:3:4:5:6:7:8
+No match
+    a123:bce:ddde:9999:b342::324e:dcba:abcd
+No match
+    a123::9999:b342::324e:dcba:abcd
+No match
+    abcde:2:3:4:5:6:7:8
+No match
+    ::1
+No match
+    abcd:fee0:123::   
+No match
+    :1
+No match
+    1:  
+No match
+
+/[z\Qa-d]\E]/
+    z
+ 0: z
+    a
+ 0: a
+    -
+ 0: -
+    d
+ 0: d
+    ] 
+ 0: ]
+    *** Failers
+ 0: a
+    b     
+No match
+
+/[\z\C]/
+    z
+ 0: z
+    C 
+ 0: C
+    
+/\M/
+    M 
+ 0: M
+    
+/(a+)*b/
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 
+No match
+    
+/(?i)reg(?:ul(?:[a�]|ae)r|ex)/
+    REGular
+ 0: REGular
+    regulaer
+ 0: regulaer
+    Regex  
+ 0: Regex
+    regul�r 
+ 0: regul\xe4r
+
+/����[�-��-�]+/
+    �����
+ 0: \xc5\xe6\xe5\xe4\xe0
+    �����
+ 0: \xc5\xe6\xe5\xe4\xff
+    �����
+ 0: \xc5\xe6\xe5\xe4\xc0
+    �����
+ 0: \xc5\xe6\xe5\xe4\xdf
+
+/(?<=Z)X./
+  \x84XAZXB
+ 0: XB
+
+/ End of testinput1 /
diff --git a/external-libs/pcre/testdata/testoutput2 b/external-libs/pcre/testdata/testoutput2
new file mode 100644
index 00000000..ea28ccf1
--- /dev/null
+++ b/external-libs/pcre/testdata/testoutput2
@@ -0,0 +1,4575 @@
+PCRE version 4.5 01-December-2003
+
+/(a)b|/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+
+/abc/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+    abc
+ 0: abc
+    defabc
+ 0: abc
+    \Aabc
+ 0: abc
+    *** Failers
+No match
+    \Adefabc
+No match
+    ABC
+No match
+
+/^abc/
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    abc
+ 0: abc
+    \Aabc
+ 0: abc
+    *** Failers
+No match
+    defabc
+No match
+    \Adefabc
+No match
+
+/a+bc/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/a*bc/
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'c'
+
+/a{3}bc/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/(abc|a+z)/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/^abc$/
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    abc
+ 0: abc
+    *** Failers
+No match
+    def\nabc
+No match
+
+/ab\gdef/X
+Failed: unrecognized character follows \ at offset 3
+
+/(?X)ab\gdef/X
+Failed: unrecognized character follows \ at offset 7
+
+/x{5,4}/
+Failed: numbers out of order in {} quantifier at offset 5
+
+/z{65536}/
+Failed: number too big in {} quantifier at offset 7
+
+/[abcd/
+Failed: missing terminating ] for character class at offset 5
+
+/(?X)[\B]/
+Failed: invalid escape sequence in character class at offset 6
+
+/[z-a]/
+Failed: range out of order in character class at offset 3
+
+/^*/
+Failed: nothing to repeat at offset 1
+
+/(abc/
+Failed: missing ) at offset 4
+
+/(?# abc/
+Failed: missing ) after comment at offset 7
+
+/(?z)abc/
+Failed: unrecognized character after (? at offset 2
+
+/.*b/
+Capturing subpattern count = 0
+No options
+First char at start or follows \n
+Need char = 'b'
+
+/.*?b/
+Capturing subpattern count = 0
+No options
+First char at start or follows \n
+Need char = 'b'
+
+/cat|dog|elephant/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    this sentence eventually mentions a cat
+ 0: cat
+    this sentences rambles on and on for a while and then reaches elephant
+ 0: elephant
+
+/cat|dog|elephant/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: c d e 
+    this sentence eventually mentions a cat
+ 0: cat
+    this sentences rambles on and on for a while and then reaches elephant
+ 0: elephant
+
+/cat|dog|elephant/iS
+Capturing subpattern count = 0
+Options: caseless
+No first char
+No need char
+Starting character set: C D E c d e 
+    this sentence eventually mentions a CAT cat
+ 0: CAT
+    this sentences rambles on and on for a while to elephant ElePhant
+ 0: elephant
+
+/a|[bcd]/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b c d 
+
+/(a|[^\dZ])/S
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+Starting character set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a 
+  \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 
+  \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = > 
+  ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d 
+  e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83 
+  \x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92 
+  \x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1 
+  \xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0 
+  \xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf 
+  \xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce 
+  \xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd 
+  \xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec 
+  \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb 
+  \xfc \xfd \xfe \xff 
+
+/(a|b)*[\s]/S
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+Starting character set: \x09 \x0a \x0c \x0d \x20 a b 
+
+/(ab\2)/
+Failed: reference to non-existent subpattern at offset 6
+
+/{4,5}abc/
+Failed: nothing to repeat at offset 4
+
+/(a)(b)(c)\2/
+Capturing subpattern count = 3
+Max back reference = 2
+No options
+First char = 'a'
+Need char = 'c'
+    abcb
+ 0: abcb
+ 1: a
+ 2: b
+ 3: c
+    \O0abcb
+Matched, but too many substrings
+    \O3abcb
+Matched, but too many substrings
+ 0: abcb
+    \O6abcb
+Matched, but too many substrings
+ 0: abcb
+ 1: a
+    \O9abcb
+Matched, but too many substrings
+ 0: abcb
+ 1: a
+ 2: b
+    \O12abcb 
+ 0: abcb
+ 1: a
+ 2: b
+ 3: c
+
+/(a)bc|(a)(b)\2/
+Capturing subpattern count = 3
+Max back reference = 2
+No options
+First char = 'a'
+No need char
+    abc
+ 0: abc
+ 1: a
+    \O0abc
+Matched, but too many substrings
+    \O3abc
+Matched, but too many substrings
+ 0: abc
+    \O6abc
+ 0: abc
+ 1: a
+    aba
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+    \O0aba
+Matched, but too many substrings
+    \O3aba
+Matched, but too many substrings
+ 0: aba
+    \O6aba
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+    \O9aba
+Matched, but too many substrings
+ 0: aba
+ 1: <unset>
+ 2: a
+    \O12aba
+ 0: aba
+ 1: <unset>
+ 2: a
+ 3: b
+
+/abc$/E
+Capturing subpattern count = 0
+Options: dollar_endonly
+First char = 'a'
+Need char = 'c'
+    abc
+ 0: abc
+    *** Failers
+No match
+    abc\n
+No match
+    abc\ndef
+No match
+
+/(a)(b)(c)(d)(e)\6/
+Failed: reference to non-existent subpattern at offset 17
+
+/the quick brown fox/
+Capturing subpattern count = 0
+No options
+First char = 't'
+Need char = 'x'
+    the quick brown fox
+ 0: the quick brown fox
+    this is a line with the quick brown fox
+ 0: the quick brown fox
+
+/the quick brown fox/A
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    the quick brown fox
+ 0: the quick brown fox
+    *** Failers
+No match
+    this is a line with the quick brown fox
+No match
+
+/ab(?z)cd/
+Failed: unrecognized character after (? at offset 4
+
+/^abc|def/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    abcdef
+ 0: abc
+    abcdef\B
+ 0: def
+
+/.*((abc)$|(def))/
+Capturing subpattern count = 3
+No options
+First char at start or follows \n
+No need char
+    defabc
+ 0: defabc
+ 1: abc
+ 2: abc
+    \Zdefabc
+ 0: def
+ 1: def
+ 2: <unset>
+ 3: def
+
+/abc/P
+    abc
+ 0: abc
+    *** Failers
+No match: POSIX code 17: match failed
+    
+/^abc|def/P
+    abcdef
+ 0: abc
+    abcdef\B
+ 0: def
+
+/.*((abc)$|(def))/P
+    defabc
+ 0: defabc
+ 1: abc
+ 2: abc
+    \Zdefabc
+ 0: def
+ 1: def
+ 3: def
+  
+/the quick brown fox/P
+    the quick brown fox
+ 0: the quick brown fox
+    *** Failers 
+No match: POSIX code 17: match failed
+    The Quick Brown Fox 
+No match: POSIX code 17: match failed
+
+/the quick brown fox/Pi
+    the quick brown fox
+ 0: the quick brown fox
+    The Quick Brown Fox 
+ 0: The Quick Brown Fox
+
+/abc.def/P
+    *** Failers
+No match: POSIX code 17: match failed
+    abc\ndef
+No match: POSIX code 17: match failed
+    
+/abc$/P
+    abc
+ 0: abc
+    abc\n 
+ 0: abc
+
+/(abc)\2/P
+Failed: POSIX code 15: bad back reference at offset 7     
+
+/(abc\1)/P
+    abc
+No match: POSIX code 17: match failed
+
+/)/
+Failed: unmatched parentheses at offset 0
+
+/a[]b/
+Failed: missing terminating ] for character class at offset 4
+
+/[^aeiou ]{3,}/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    co-processors, and for 
+ 0: -pr
+    
+/<.*>/
+Capturing subpattern count = 0
+No options
+First char = '<'
+Need char = '>'
+    abc<def>ghi<klm>nop
+ 0: <def>ghi<klm>
+
+/<.*?>/
+Capturing subpattern count = 0
+No options
+First char = '<'
+Need char = '>'
+    abc<def>ghi<klm>nop
+ 0: <def>
+
+/<.*>/U
+Capturing subpattern count = 0
+Options: ungreedy
+First char = '<'
+Need char = '>'
+    abc<def>ghi<klm>nop
+ 0: <def>
+    
+/(?U)<.*>/
+Capturing subpattern count = 0
+Options: ungreedy
+First char = '<'
+Need char = '>'
+    abc<def>ghi<klm>nop
+ 0: <def>
+
+/<.*?>/U
+Capturing subpattern count = 0
+Options: ungreedy
+First char = '<'
+Need char = '>'
+    abc<def>ghi<klm>nop
+ 0: <def>ghi<klm>
+    
+/={3,}/U
+Capturing subpattern count = 0
+Options: ungreedy
+First char = '='
+Need char = '='
+    abc========def
+ 0: ===
+    
+/(?U)={3,}?/
+Capturing subpattern count = 0
+Options: ungreedy
+First char = '='
+Need char = '='
+    abc========def
+ 0: ========
+    
+/(?<!bar|cattle)foo/
+Capturing subpattern count = 0
+No options
+First char = 'f'
+Need char = 'o'
+    foo
+ 0: foo
+    catfoo 
+ 0: foo
+    *** Failers
+No match
+    the barfoo
+No match
+    and cattlefoo   
+No match
+
+/(?<=a+)b/
+Failed: lookbehind assertion is not fixed length at offset 6
+
+/(?<=aaa|b{0,3})b/
+Failed: lookbehind assertion is not fixed length at offset 14
+
+/(?<!(foo)a\1)bar/
+Failed: lookbehind assertion is not fixed length at offset 12
+
+/(?i)abc/
+Capturing subpattern count = 0
+Options: caseless
+First char = 'a' (caseless)
+Need char = 'c' (caseless)
+
+/(a|(?m)a)/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/(?i)^1234/
+Capturing subpattern count = 0
+Options: anchored caseless
+No first char
+No need char
+
+/(^b|(?i)^d)/
+Capturing subpattern count = 1
+Options: anchored
+Case state changes
+No first char
+No need char
+
+/(?s).*/
+Capturing subpattern count = 0
+Options: anchored dotall
+No first char
+No need char
+
+/[abcd]/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b c d 
+
+/(?i)[abcd]/S
+Capturing subpattern count = 0
+Options: caseless
+No first char
+No need char
+Starting character set: A B C D a b c d 
+
+/(?m)[xy]|(b|c)/S
+Capturing subpattern count = 1
+Options: multiline
+No first char
+No need char
+Starting character set: b c x y 
+
+/(^a|^b)/m
+Capturing subpattern count = 1
+Options: multiline
+First char at start or follows \n
+No need char
+
+/(?i)(^a|^b)/m
+Capturing subpattern count = 1
+Options: caseless multiline
+First char at start or follows \n
+No need char
+
+/(a)(?(1)a|b|c)/
+Failed: conditional group contains more than two branches at offset 13
+
+/(?(?=a)a|b|c)/
+Failed: conditional group contains more than two branches at offset 12
+
+/(?(1a)/
+Failed: malformed number after (?( at offset 4
+
+/(?(?i))/
+Failed: assertion expected after (?( at offset 3
+
+/(?(abc))/
+Failed: assertion expected after (?( at offset 3
+
+/(?(?<ab))/
+Failed: unrecognized character after (?< at offset 5
+
+/((?s)blah)\s+\1/
+Capturing subpattern count = 1
+Max back reference = 1
+No options
+First char = 'b'
+Need char = 'h'
+
+/((?i)blah)\s+\1/
+Capturing subpattern count = 1
+Max back reference = 1
+No options
+Case state changes
+First char = 'b' (caseless)
+Need char = 'h' (caseless)
+
+/((?i)b)/DS
+------------------------------------------------------------------
+  0  16 Bra 0
+  3   8 Bra 1
+  6  01 Opt
+  8   1 b
+ 11   8 Ket
+ 14  00 Opt
+ 16  16 Ket
+ 19     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+Case state changes
+First char = 'b' (caseless)
+No need char
+Study returned NULL
+
+/(a*b|(?i:c*(?-i)d))/S
+Capturing subpattern count = 1
+No options
+Case state changes
+No first char
+No need char
+Starting character set: C a b c d 
+
+/a$/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+    a
+ 0: a
+    a\n
+ 0: a
+    *** Failers 
+No match
+    \Za
+No match
+    \Za\n   
+No match
+
+/a$/m
+Capturing subpattern count = 0
+Options: multiline
+First char = 'a'
+No need char
+    a
+ 0: a
+    a\n
+ 0: a
+    \Za\n   
+ 0: a
+    *** Failers 
+No match
+    \Za
+No match
+    
+/\Aabc/m
+Capturing subpattern count = 0
+Options: anchored multiline
+No first char
+No need char
+
+/^abc/m 
+Capturing subpattern count = 0
+Options: multiline
+First char at start or follows \n
+Need char = 'c'
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/
+Capturing subpattern count = 5
+Options: anchored
+No first char
+No need char
+  aaaaabbbbbcccccdef
+ 0: aaaaabbbbbcccccdef
+ 1: aaaaabbbbbcccccdef
+ 2: aaaaa
+ 3: b
+ 4: bbbbccccc
+ 5: def
+
+/(?<=foo)[ab]/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b 
+
+/(?<!foo)(alpha|omega)/S
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'a'
+Starting character set: a o 
+
+/(?!alphabet)[ab]/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b 
+
+/(?<=foo\n)^bar/m
+Capturing subpattern count = 0
+Options: multiline
+First char at start or follows \n
+Need char = 'r'
+
+/(?>^abc)/m
+Capturing subpattern count = 0
+Options: multiline
+First char at start or follows \n
+Need char = 'c'
+    abc
+ 0: abc
+    def\nabc
+ 0: abc
+    *** Failers
+No match
+    defabc   
+No match
+
+/(?<=ab(c+)d)ef/
+Failed: lookbehind assertion is not fixed length at offset 11
+
+/(?<=ab(?<=c+)d)ef/
+Failed: lookbehind assertion is not fixed length at offset 12
+
+/(?<=ab(c|de)f)g/
+Failed: lookbehind assertion is not fixed length at offset 13
+
+/The next three are in testinput2 because they have variable length branches/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = 's'
+
+/(?<=bullock|donkey)-cart/
+Capturing subpattern count = 0
+No options
+First char = '-'
+Need char = 't'
+    the bullock-cart
+ 0: -cart
+    a donkey-cart race
+ 0: -cart
+    *** Failers
+No match
+    cart
+No match
+    horse-and-cart    
+No match
+      
+/(?<=ab(?i)x|y|z)/
+Capturing subpattern count = 0
+No options
+Case state changes
+No first char
+No need char
+
+/(?>.*)(?<=(abcd)|(xyz))/
+Capturing subpattern count = 2
+No options
+First char at start or follows \n
+No need char
+    alphabetabcd
+ 0: alphabetabcd
+ 1: abcd
+    endingxyz
+ 0: endingxyz
+ 1: <unset>
+ 2: xyz
+
+/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/
+Capturing subpattern count = 0
+No options
+Case state changes
+First char = 'Z'
+Need char = 'Z'
+    abxyZZ
+ 0: ZZ
+    abXyZZ
+ 0: ZZ
+    ZZZ
+ 0: ZZ
+    zZZ
+ 0: ZZ
+    bZZ
+ 0: ZZ
+    BZZ     
+ 0: ZZ
+    *** Failers
+No match
+    ZZ 
+No match
+    abXYZZ 
+No match
+    zzz
+No match
+    bzz  
+No match
+
+/(?<!(foo)a)bar/
+Capturing subpattern count = 1
+No options
+First char = 'b'
+Need char = 'r'
+    bar
+ 0: bar
+    foobbar 
+ 0: bar
+    *** Failers
+No match
+    fooabar  
+No match
+
+/This one is here because Perl 5.005_02 doesn't fail it/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = 't'
+
+/^(a)?(?(1)a|b)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    *** Failers
+No match
+    a 
+No match
+
+/This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = 'g'
+
+/^(a\1?){4}$/
+Capturing subpattern count = 1
+Max back reference = 1
+Options: anchored
+No first char
+No need char
+    aaaaaa
+ 0: aaaaaa
+ 1: aa
+    
+/These are syntax tests from Perl 5.005/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = '5'
+
+/a[b-a]/
+Failed: range out of order in character class at offset 4
+
+/a[]b/
+Failed: missing terminating ] for character class at offset 4
+
+/a[/
+Failed: missing terminating ] for character class at offset 2
+
+/*a/
+Failed: nothing to repeat at offset 0
+
+/(*)b/
+Failed: nothing to repeat at offset 1
+
+/abc)/
+Failed: unmatched parentheses at offset 3
+
+/(abc/
+Failed: missing ) at offset 4
+
+/a**/
+Failed: nothing to repeat at offset 2
+
+/)(/
+Failed: unmatched parentheses at offset 0
+
+/\1/
+Failed: reference to non-existent subpattern at offset 2
+
+/\2/
+Failed: reference to non-existent subpattern at offset 2
+
+/(a)|\2/
+Failed: reference to non-existent subpattern at offset 6
+
+/a[b-a]/i
+Failed: range out of order in character class at offset 4
+
+/a[]b/i
+Failed: missing terminating ] for character class at offset 4
+
+/a[/i
+Failed: missing terminating ] for character class at offset 2
+
+/*a/i
+Failed: nothing to repeat at offset 0
+
+/(*)b/i
+Failed: nothing to repeat at offset 1
+
+/abc)/i
+Failed: unmatched parentheses at offset 3
+
+/(abc/i
+Failed: missing ) at offset 4
+
+/a**/i
+Failed: nothing to repeat at offset 2
+
+/)(/i
+Failed: unmatched parentheses at offset 0
+
+/:(?:/
+Failed: missing ) at offset 4
+
+/(?<%)b/
+Failed: unrecognized character after (?< at offset 3
+
+/a(?{)b/
+Failed: unrecognized character after (? at offset 3
+
+/a(?{{})b/
+Failed: unrecognized character after (? at offset 3
+
+/a(?{}})b/
+Failed: unrecognized character after (? at offset 3
+
+/a(?{"{"})b/
+Failed: unrecognized character after (? at offset 3
+
+/a(?{"{"}})b/
+Failed: unrecognized character after (? at offset 3
+
+/(?(1?)a|b)/
+Failed: malformed number after (?( at offset 4
+
+/(?(1)a|b|c)/
+Failed: conditional group contains more than two branches at offset 10
+
+/[a[:xyz:/
+Failed: missing terminating ] for character class at offset 8
+
+/(?<=x+)y/
+Failed: lookbehind assertion is not fixed length at offset 6
+
+/a{37,17}/
+Failed: numbers out of order in {} quantifier at offset 7
+
+/abc/\
+Failed: \ at end of pattern at offset 4
+
+/abc/\P
+Failed: POSIX code 9: bad escape sequence at offset 4     
+
+/abc/\i
+Failed: \ at end of pattern at offset 4
+
+/(a)bc(d)/
+Capturing subpattern count = 2
+No options
+First char = 'a'
+Need char = 'd'
+    abcd
+ 0: abcd
+ 1: a
+ 2: d
+    abcd\C2
+ 0: abcd
+ 1: a
+ 2: d
+ 2C d (1)
+    abcd\C5
+ 0: abcd
+ 1: a
+ 2: d
+copy substring 5 failed -7
+     
+/(.{20})/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+    abcdefghijklmnopqrstuvwxyz\C1
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+copy substring 1 failed -6
+    abcdefghijklmnopqrstuvwxyz\G1
+ 0: abcdefghijklmnopqrst
+ 1: abcdefghijklmnopqrst
+ 1G abcdefghijklmnopqrst (20)
+     
+/(.{15})/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmno
+ 1: abcdefghijklmno
+    abcdefghijklmnopqrstuvwxyz\C1\G1
+ 0: abcdefghijklmno
+ 1: abcdefghijklmno
+ 1C abcdefghijklmno (15)
+ 1G abcdefghijklmno (15)
+
+/(.{16})/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    abcdefghijklmnopqrstuvwxyz
+ 0: abcdefghijklmnop
+ 1: abcdefghijklmnop
+    abcdefghijklmnopqrstuvwxyz\C1\G1\L
+ 0: abcdefghijklmnop
+ 1: abcdefghijklmnop
+copy substring 1 failed -6
+ 1G abcdefghijklmnop (16)
+ 0L abcdefghijklmnop
+ 1L abcdefghijklmnop
+    
+/^(a|(bc))de(f)/
+Capturing subpattern count = 3
+Options: anchored
+No first char
+No need char
+    adef\G1\G2\G3\G4\L 
+ 0: adef
+ 1: a
+ 2: <unset>
+ 3: f
+ 1G a (1)
+ 2G  (0)
+ 3G f (1)
+get substring 4 failed -7
+ 0L adef
+ 1L a
+ 2L 
+ 3L f
+    bcdef\G1\G2\G3\G4\L 
+ 0: bcdef
+ 1: bc
+ 2: bc
+ 3: f
+ 1G bc (2)
+ 2G bc (2)
+ 3G f (1)
+get substring 4 failed -7
+ 0L bcdef
+ 1L bc
+ 2L bc
+ 3L f
+    adefghijk\C0 
+ 0: adef
+ 1: a
+ 2: <unset>
+ 3: f
+ 0C adef (4)
+    
+/^abc\00def/
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    abc\00def\L\C0 
+ 0: abc\x00def
+ 0C abc (7)
+ 0L abc
+    
+/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ 
+)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ 
+)?)?)?)?)?)?)?)?)?otherword/M
+Memory allocation (code space): 428
+Capturing subpattern count = 8
+No options
+First char = 'w'
+Need char = 'd'
+
+/.*X/D
+------------------------------------------------------------------
+  0   8 Bra 0
+  3     Any*
+  5   1 X
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char at start or follows \n
+Need char = 'X'
+
+/.*X/Ds
+------------------------------------------------------------------
+  0   8 Bra 0
+  3     Any*
+  5   1 X
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored dotall
+No first char
+Need char = 'X'
+
+/(.*X|^B)/D
+------------------------------------------------------------------
+  0  21 Bra 0
+  3   8 Bra 1
+  6     Any*
+  8   1 X
+ 11   7 Alt
+ 14     ^
+ 15   1 B
+ 18  15 Ket
+ 21  21 Ket
+ 24     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+First char at start or follows \n
+No need char
+
+/(.*X|^B)/Ds
+------------------------------------------------------------------
+  0  21 Bra 0
+  3   8 Bra 1
+  6     Any*
+  8   1 X
+ 11   7 Alt
+ 14     ^
+ 15   1 B
+ 18  15 Ket
+ 21  21 Ket
+ 24     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: anchored dotall
+No first char
+No need char
+    
+/(?s)(.*X|^B)/D
+------------------------------------------------------------------
+  0  21 Bra 0
+  3   8 Bra 1
+  6     Any*
+  8   1 X
+ 11   7 Alt
+ 14     ^
+ 15   1 B
+ 18  15 Ket
+ 21  21 Ket
+ 24     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: anchored dotall
+No first char
+No need char
+
+/(?s:.*X|^B)/D
+------------------------------------------------------------------
+  0  27 Bra 0
+  3  10 Bra 0
+  6  04 Opt
+  8     Any*
+ 10   1 X
+ 13   9 Alt
+ 16  04 Opt
+ 18     ^
+ 19   1 B
+ 22  19 Ket
+ 25  00 Opt
+ 27  27 Ket
+ 30     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char at start or follows \n
+No need char
+
+/\Biss\B/+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+
+/\Biss\B/+P
+    Mississippi
+ 0: iss
+ 0+ issippi
+
+/iss/G+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+
+/\Biss\B/G+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+
+/\Biss\B/g+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+    *** Failers
+No match
+    Mississippi\A
+No match
+
+/(?<=[Ms])iss/g+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+ 0: iss
+ 0+ ippi
+
+/(?<=[Ms])iss/G+
+Capturing subpattern count = 0
+No options
+First char = 'i'
+Need char = 's'
+    Mississippi
+ 0: iss
+ 0+ issippi
+
+/^iss/g+
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    ississippi
+ 0: iss
+ 0+ issippi
+    
+/.*iss/g+
+Capturing subpattern count = 0
+No options
+First char at start or follows \n
+Need char = 's'
+    abciss\nxyzisspqr 
+ 0: abciss
+ 0+ \x0axyzisspqr
+ 0: xyziss
+ 0+ pqr
+
+/.i./+g
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'i'
+    Mississippi
+ 0: Mis
+ 0+ sissippi
+ 0: sis
+ 0+ sippi
+ 0: sip
+ 0+ pi
+    Mississippi\A
+ 0: Mis
+ 0+ sissippi
+ 0: sis
+ 0+ sippi
+ 0: sip
+ 0+ pi
+    Missouri river
+ 0: Mis
+ 0+ souri river
+ 0: ri 
+ 0+ river
+ 0: riv
+ 0+ er
+    Missouri river\A  
+ 0: Mis
+ 0+ souri river
+
+/^.is/+g
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    Mississippi
+ 0: Mis
+ 0+ sissippi
+
+/^ab\n/g+
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+    ab\nab\ncd
+ 0: ab\x0a
+ 0+ ab\x0acd
+
+/^ab\n/mg+
+Capturing subpattern count = 0
+Options: multiline
+First char at start or follows \n
+Need char = 10
+    ab\nab\ncd
+ 0: ab\x0a
+ 0+ ab\x0acd
+ 0: ab\x0a
+ 0+ cd
+
+/abc/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/abc|bac/
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'c'
+
+/(abc|bac)/
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'c'
+
+/(abc|(c|dc))/
+Capturing subpattern count = 2
+No options
+No first char
+Need char = 'c'
+
+/(abc|(d|de)c)/
+Capturing subpattern count = 2
+No options
+No first char
+Need char = 'c'
+
+/a*/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/a+/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/(baa|a+)/
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'a'
+
+/a{0,3}/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/baa{3,}/
+Capturing subpattern count = 0
+No options
+First char = 'b'
+Need char = 'a'
+
+/"([^\\"]+|\\.)*"/
+Capturing subpattern count = 1
+No options
+First char = '"'
+Need char = '"'
+
+/(abc|ab[cd])/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/(a|.)/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+
+/a|ba|\w/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/abc(?=pqr)/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'r'
+
+/...(?<=abc)/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/abc(?!pqr)/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/ab./
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/ab[xyz]/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/abc*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/ab.c*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/a.c*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/.c*/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/ac*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/(a.c*|b.c*)/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+
+/a.c*|aba/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/.+a/
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'a'
+
+/(?=abcda)a.*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'a'
+
+/(?=a)a.*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/a(b)*/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/a\d*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/ab\d*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/a(\d)*/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/abcde{0,0}/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'd'
+
+/ab\d+/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/a(?(1)b)/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/a(?(1)bag|big)/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'g'
+
+/a(?(1)bag|big)*/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/a(?(1)bag|big)+/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'g'
+
+/a(?(1)b..|b..)/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/ab\d{0}e/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'e'
+
+/a?b?/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    a
+ 0: a
+    b
+ 0: b
+    ab
+ 0: ab
+    \
+ 0: 
+    *** Failers
+ 0: 
+    \N     
+No match
+    
+/|-/
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    abcd
+ 0: 
+    -abc
+ 0: 
+    \Nab-c
+ 0: -
+    *** Failers
+ 0: 
+    \Nabc     
+No match
+
+/a*(b+)(z)(z)/P
+    aaaabbbbzzzz
+ 0: aaaabbbbzz
+ 1: bbbb
+ 2: z
+ 3: z
+    aaaabbbbzzzz\O0
+    aaaabbbbzzzz\O1
+ 0: aaaabbbbzz
+    aaaabbbbzzzz\O2
+ 0: aaaabbbbzz
+ 1: bbbb
+    aaaabbbbzzzz\O3
+ 0: aaaabbbbzz
+ 1: bbbb
+ 2: z
+    aaaabbbbzzzz\O4
+ 0: aaaabbbbzz
+ 1: bbbb
+ 2: z
+ 3: z
+    aaaabbbbzzzz\O5
+ 0: aaaabbbbzz
+ 1: bbbb
+ 2: z
+ 3: z
+    
+/^.?abcd/S 
+Capturing subpattern count = 0
+Options: anchored
+No first char
+Need char = 'd'
+Study returned NULL
+
+/\(             # ( at start
+  (?:           # Non-capturing bracket
+  (?>[^()]+)    # Either a sequence of non-brackets (no backtracking)
+  |             # Or
+  (?R)          # Recurse - i.e. nested bracketed string
+  )*            # Zero or more contents
+  \)            # Closing )
+  /x
+Capturing subpattern count = 0
+Options: extended
+First char = '('
+Need char = ')'
+    (abcd)
+ 0: (abcd)
+    (abcd)xyz
+ 0: (abcd)
+    xyz(abcd)
+ 0: (abcd)
+    (ab(xy)cd)pqr 
+ 0: (ab(xy)cd)
+    (ab(xycd)pqr 
+ 0: (xycd)
+    () abc () 
+ 0: ()
+    12(abcde(fsh)xyz(foo(bar))lmno)89
+ 0: (abcde(fsh)xyz(foo(bar))lmno)
+    *** Failers
+No match
+    abcd 
+No match
+    abcd)
+No match
+    (abcd  
+No match
+
+/\(  ( (?>[^()]+) | (?R) )* \) /xg
+Capturing subpattern count = 1
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)pqr 
+ 0: (ab(xy)cd)
+ 1: cd
+    1(abcd)(x(y)z)pqr
+ 0: (abcd)
+ 1: abcd
+ 0: (x(y)z)
+ 1: z
+
+/\(  (?: (?>[^()]+) | (?R) ) \) /x
+Capturing subpattern count = 0
+Options: extended
+First char = '('
+Need char = ')'
+    (abcd)
+ 0: (abcd)
+    (ab(xy)cd)
+ 0: (xy)
+    (a(b(c)d)e) 
+ 0: (c)
+    ((ab)) 
+ 0: ((ab))
+    *** Failers
+No match
+    ()   
+No match
+
+/\(  (?: (?>[^()]+) | (?R) )? \) /x
+Capturing subpattern count = 0
+Options: extended
+First char = '('
+Need char = ')'
+    ()
+ 0: ()
+    12(abcde(fsh)xyz(foo(bar))lmno)89
+ 0: (fsh)
+
+/\(  ( (?>[^()]+) | (?R) )* \) /x
+Capturing subpattern count = 1
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: cd
+
+/\( ( ( (?>[^()]+) | (?R) )* ) \) /x
+Capturing subpattern count = 2
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: cd
+
+/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x
+Capturing subpattern count = 3
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: <unset>
+ 2: ab(xy)cd
+ 3: cd
+    (123ab(xy)cd)
+ 0: (123ab(xy)cd)
+ 1: 123
+ 2: ab(xy)cd
+ 3: cd
+
+/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x
+Capturing subpattern count = 3
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: <unset>
+ 3: cd
+    (123ab(xy)cd)
+ 0: (123ab(xy)cd)
+ 1: 123ab(xy)cd
+ 2: 123
+ 3: cd
+
+/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x
+Capturing subpattern count = 11
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(xy)cd)
+ 0: (ab(xy)cd)
+ 1: ab(xy)cd
+ 2: ab(xy)cd
+ 3: ab(xy)cd
+ 4: ab(xy)cd
+ 5: ab(xy)cd
+ 6: ab(xy)cd
+ 7: ab(xy)cd
+ 8: ab(xy)cd
+ 9: ab(xy)cd
+10: ab(xy)cd
+11: cd
+
+/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x
+Capturing subpattern count = 3
+Options: extended
+First char = '('
+Need char = ')'
+    (abcd(xyz<p>qrs)123)
+ 0: (abcd(xyz<p>qrs)123)
+ 1: abcd(xyz<p>qrs)123
+ 2: 123
+ 3: <unset>
+
+/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x
+Capturing subpattern count = 3
+Options: extended
+First char = '('
+Need char = ')'
+    (ab(cd)ef)
+ 0: (ab(cd)ef)
+ 1: ab(cd)ef
+ 2: ef
+ 3: (cd)
+    (ab(cd(ef)gh)ij)
+ 0: (ab(cd(ef)gh)ij)
+ 1: ab(cd(ef)gh)ij
+ 2: ij
+ 3: (cd(ef)gh)
+
+/^[[:alnum:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [0-9A-Za-z]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:alpha:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [A-Za-z]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+             
+/^[[:ascii:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x00-\x7f]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:blank:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x09 ]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:cntrl:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x00-\x1f\x7f]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:digit:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [0-9]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:graph:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [!-~]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:lower:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [a-z]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:print:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [ -~]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:punct:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [!-/:-@[-`{-~]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:space:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x09-\x0d ]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:upper:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [A-Z]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:xdigit:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [0-9A-Fa-f]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:word:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [0-9A-Z_a-z]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:^cntrl:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [ -~\x80-\xff]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[12[:^digit:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x00-/1-2:-\xff]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/^[[:^blank:]]/D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x00-\x08\x0a-\x1f!-\xff]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/[01[:alpha:]%]/D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [%0-1A-Za-z]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[[.ch.]]/
+Failed: POSIX collating elements are not supported at offset 1
+
+/[[=ch=]]/
+Failed: POSIX collating elements are not supported at offset 1
+
+/[[:rhubarb:]]/
+Failed: unknown POSIX class name at offset 3
+
+/[[:upper:]]/i
+Capturing subpattern count = 0
+Options: caseless
+No first char
+No need char
+    A
+ 0: A
+    a 
+ 0: a
+    
+/[[:lower:]]/i
+Capturing subpattern count = 0
+Options: caseless
+No first char
+No need char
+    A
+ 0: A
+    a 
+ 0: a
+
+/((?-i)[[:lower:]])[[:lower:]]/i
+Capturing subpattern count = 1
+Options: caseless
+Case state changes
+No first char
+No need char
+    ab
+ 0: ab
+ 1: a
+    aB
+ 0: aB
+ 1: a
+    *** Failers
+ 0: ai
+ 1: a
+    Ab
+No match
+    AB        
+No match
+
+/[\200-\410]/
+Failed: range out of order in character class at offset 9
+
+/^(?(0)f|b)oo/
+Failed: invalid condition (?(0) at offset 5
+
+/This one's here because of the large output vector needed/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = 'd'
+
+/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/
+Capturing subpattern count = 271
+Max back reference = 270
+No options
+No first char
+No need char
+    \O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+ 0: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+ 1: 1 
+ 2: 2 
+ 3: 3 
+ 4: 4 
+ 5: 5 
+ 6: 6 
+ 7: 7 
+ 8: 8 
+ 9: 9 
+10: 10 
+11: 11 
+12: 12 
+13: 13 
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+15: 15 
+16: 16 
+17: 17 
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+34: 34 
+35: 35 
+36: 36 
+37: 37 
+38: 38 
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+41: 41 
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+43: 43 
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+45: 45 
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+55: 55 
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+73: 73 
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+75: 75 
+76: 76 
+77: 77 
+78: 78 
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+80: 80 
+81: 81 
+82: 82 
+83: 83 
+84: 84 
+85: 85 
+86: 86 
+87: 87 
+88: 88 
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+90: 90 
+91: 91 
+92: 92 
+93: 93 
+94: 94 
+95: 95 
+96: 96 
+97: 97 
+98: 98 
+99: 99 
+100: 100 
+101: 101 
+102: 102 
+103: 103 
+104: 104 
+105: 105 
+106: 106 
+107: 107 
+108: 108 
+109: 109 
+110: 110 
+111: 111 
+112: 112 
+113: 113 
+114: 114 
+115: 115 
+116: 116 
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+118: 118 
+119: 119 
+120: 120 
+121: 121 
+122: 122 
+123: 123 
+124: 124 
+125: 125 
+126: 126 
+127: 127 
+128: 128 
+129: 129 
+130: 130 
+131: 131 
+132: 132 
+133: 133 
+134: 134 
+135: 135 
+136: 136 
+137: 137 
+138: 138 
+139: 139 
+140: 140 
+141: 141 
+142: 142 
+143: 143 
+144: 144 
+145: 145 
+146: 146 
+147: 147 
+148: 148 
+149: 149 
+150: 150 
+151: 151 
+152: 152 
+153: 153 
+154: 154 
+155: 155 
+156: 156 
+157: 157 
+158: 158 
+159: 159 
+160: 160 
+161: 161 
+162: 162 
+163: 163 
+164: 164 
+165: 165 
+166: 166 
+167: 167 
+168: 168 
+169: 169 
+170: 170 
+171: 171 
+172: 172 
+173: 173 
+174: 174 
+175: 175 
+176: 176 
+177: 177 
+178: 178 
+179: 179 
+180: 180 
+181: 181 
+182: 182 
+183: 183 
+184: 184 
+185: 185 
+186: 186 
+187: 187 
+188: 188 
+189: 189 
+190: 190 
+191: 191 
+192: 192 
+193: 193 
+194: 194 
+195: 195 
+196: 196 
+197: 197 
+198: 198 
+199: 199 
+200: 200 
+201: 201 
+202: 202 
+203: 203 
+204: 204 
+205: 205 
+206: 206 
+207: 207 
+208: 208 
+209: 209 
+210: 210 
+211: 211 
+212: 212 
+213: 213 
+214: 214 
+215: 215 
+216: 216 
+217: 217 
+218: 218 
+219: 219 
+220: 220 
+221: 221 
+222: 222 
+223: 223 
+224: 224 
+225: 225 
+226: 226 
+227: 227 
+228: 228 
+229: 229 
+230: 230 
+231: 231 
+232: 232 
+233: 233 
+234: 234 
+235: 235 
+236: 236 
+237: 237 
+238: 238 
+239: 239 
+240: 240 
+241: 241 
+242: 242 
+243: 243 
+244: 244 
+245: 245 
+246: 246 
+247: 247 
+248: 248 
+249: 249 
+250: 250 
+251: 251 
+252: 252 
+253: 253 
+254: 254 
+255: 255 
+256: 256 
+257: 257 
+258: 258 
+259: 259 
+260: 260 
+261: 261 
+262: 262 
+263: 263 
+264: 264 
+265: 265 
+266: 266 
+267: 267 
+268: 268 
+269: 269 
+270: ABC
+271: ABC
+
+/This one's here because Perl does this differently and PCRE can't at present/
+Capturing subpattern count = 0
+No options
+First char = 'T'
+Need char = 't'
+
+/(main(O)?)+/
+Capturing subpattern count = 2
+No options
+First char = 'm'
+Need char = 'n'
+    mainmain
+ 0: mainmain
+ 1: main
+    mainOmain
+ 0: mainOmain
+ 1: main
+ 2: O
+    
+/These are all cases where Perl does it differently (nested captures)/
+Capturing subpattern count = 1
+No options
+First char = 'T'
+Need char = 's'
+
+/^(a(b)?)+$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    aba
+ 0: aba
+ 1: a
+ 2: b
+   
+/^(aa(bb)?)+$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: aa
+ 2: bb
+    
+/^(aa|aa(bb))+$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    aabbaa 
+ 0: aabbaa
+ 1: aa
+ 2: bb
+    
+/^(aa(bb)??)+$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: aa
+ 2: bb
+    
+/^(?:aa(bb)?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: bb
+    
+/^(aa(b(b))?)+$/
+Capturing subpattern count = 3
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: aa
+ 2: bb
+ 3: b
+
+/^(?:aa(b(b))?)+$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: bb
+ 2: b
+
+/^(?:aa(b(?:b))?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: bb
+
+/^(?:aa(bb(?:b))?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbbaa    
+ 0: aabbbaa
+ 1: bbb
+    
+/^(?:aa(b(?:bb))?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbbaa    
+ 0: aabbbaa
+ 1: bbb
+
+/^(?:aa(?:b(b))?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbaa    
+ 0: aabbaa
+ 1: b
+
+/^(?:aa(?:b(bb))?)+$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    aabbbaa    
+ 0: aabbbaa
+ 1: bb
+
+/^(aa(b(bb))?)+$/
+Capturing subpattern count = 3
+Options: anchored
+No first char
+No need char
+    aabbbaa    
+ 0: aabbbaa
+ 1: aa
+ 2: bbb
+ 3: bb
+
+/^(aa(bb(bb))?)+$/
+Capturing subpattern count = 3
+Options: anchored
+No first char
+No need char
+    aabbbbaa    
+ 0: aabbbbaa
+ 1: aa
+ 2: bbbb
+ 3: bb
+
+/--------------------------------------------------------------------/ 
+Capturing subpattern count = 0
+No options
+First char = '-'
+Need char = '-'
+    
+/#/xMD
+Memory allocation (code space): 7
+------------------------------------------------------------------
+  0   3 Bra 0
+  3   3 Ket
+  6     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended
+No first char
+No need char
+
+/a#/xMD
+Memory allocation (code space): 13
+------------------------------------------------------------------
+  0   6 Bra 0
+  3   1 a
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: extended
+First char = 'a'
+No need char
+
+/[\s]/D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x09-\x0a\x0c-\x0d ]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[\S]/D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x00-\x08\x0b\x0e-\x1f!-\xff]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/a(?i)b/D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   1 a
+  6  01 Opt
+  8   1 b
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+Case state changes
+First char = 'a'
+Need char = 'b' (caseless)
+    ab
+ 0: ab
+    aB
+ 0: aB
+    *** Failers 
+No match
+    AB  
+No match
+
+/(a(?i)b)/D
+------------------------------------------------------------------
+  0  19 Bra 0
+  3  11 Bra 1
+  6   1 a
+  9  01 Opt
+ 11   1 b
+ 14  11 Ket
+ 17  00 Opt
+ 19  19 Ket
+ 22     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+Case state changes
+First char = 'a'
+Need char = 'b' (caseless)
+    ab
+ 0: ab
+ 1: ab
+    aB
+ 0: aB
+ 1: aB
+    *** Failers 
+No match
+    AB  
+No match
+    
+/   (?i)abc/xD
+------------------------------------------------------------------
+  0   8 Bra 0
+  3   3 abc
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: caseless extended
+First char = 'a' (caseless)
+Need char = 'c' (caseless)
+
+/#this is a comment
+  (?i)abc/xD
+------------------------------------------------------------------
+  0   8 Bra 0
+  3   3 abc
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: caseless extended
+First char = 'a' (caseless)
+Need char = 'c' (caseless)
+
+/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+------------------------------------------------------------------
+  0 307 Bra 0
+  3 250 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+255  50 12345678901234567890123456789012345678901234567890
+307 307 Ket
+310     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = '1'
+Need char = '0'
+
+/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+------------------------------------------------------------------
+  0 307 Bra 0
+  3 250 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+255  50 12345678901234567890123456789012345678901234567890
+307 307 Ket
+310     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = '1'
+Need char = '0'
+
+/\Q\E/D
+------------------------------------------------------------------
+  0   3 Bra 0
+  3   3 Ket
+  6     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    \
+ 0: 
+
+/\Q\Ex/D
+------------------------------------------------------------------
+  0   6 Bra 0
+  3   1 x
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'x'
+No need char
+
+/ \Q\E/D
+------------------------------------------------------------------
+  0   6 Bra 0
+  3   1  
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = ' '
+No need char
+
+/a\Q\E/D
+------------------------------------------------------------------
+  0   6 Bra 0
+  3   1 a
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+  abc
+ 0: a
+  bca
+ 0: a
+  bac  
+ 0: a
+
+/a\Q\Eb/D
+------------------------------------------------------------------
+  0   9 Bra 0
+  3   1 a
+  6   1 b
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+  abc
+ 0: ab
+
+/\Q\Eabc/D
+------------------------------------------------------------------
+  0   8 Bra 0
+  3   3 abc
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/x*+\w/D
+------------------------------------------------------------------
+  0  12 Bra 0
+  3   5 Once
+  6     x*
+  8   5 Ket
+ 11     \w
+ 12  12 Ket
+ 15     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+    *** Failers
+ 0: F
+    xxxxx
+No match
+    
+/x?+/D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   5 Once
+  6     x?
+  8   5 Ket
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/x++/D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   5 Once
+  6     x+
+  8   5 Ket
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'x'
+No need char
+
+/x{1,3}+/D 
+------------------------------------------------------------------
+  0  16 Bra 0
+  3  10 Once
+  6   1 x
+  9     x{,2}
+ 13  10 Ket
+ 16  16 Ket
+ 19     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'x'
+No need char
+
+/(x)*+/D
+------------------------------------------------------------------
+  0  19 Bra 0
+  3  13 Once
+  6     Brazero
+  7   6 Bra 1
+ 10   1 x
+ 13   6 KetRmax
+ 16  13 Ket
+ 19  19 Ket
+ 22     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+
+/^(\w++|\s++)*$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    now is the time for all good men to come to the aid of the party
+ 0: now is the time for all good men to come to the aid of the party
+ 1: party
+    *** Failers
+No match
+    this is not a line with only words and spaces!
+No match
+    
+/(\d++)(\w)/
+Capturing subpattern count = 2
+No options
+No first char
+No need char
+    12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+    *** Failers
+No match
+    12345+ 
+No match
+
+/a++b/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+    aaab
+ 0: aaab
+
+/(a++b)/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+    aaab
+ 0: aaab
+ 1: aaab
+
+/(a++)b/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+    aaab
+ 0: aaab
+ 1: aaa
+
+/([^()]++|\([^()]*\))+/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+    
+/\(([^()]++|\([^()]+\))+\)/ 
+Capturing subpattern count = 1
+No options
+First char = '('
+Need char = ')'
+    (abc)
+ 0: (abc)
+ 1: abc
+    (abc(def)xyz)
+ 0: (abc(def)xyz)
+ 1: xyz
+    *** Failers
+No match
+    ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa   
+No match
+
+/(abc){1,3}+/D
+------------------------------------------------------------------
+  0  50 Bra 0
+  3  44 Once
+  6   8 Bra 1
+  9   3 abc
+ 14   8 Ket
+ 17     Brazero
+ 18  26 Bra 0
+ 21   8 Bra 1
+ 24   3 abc
+ 29   8 Ket
+ 32     Brazero
+ 33   8 Bra 1
+ 36   3 abc
+ 41   8 Ket
+ 44  26 Ket
+ 47  44 Ket
+ 50  50 Ket
+ 53     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'c'
+
+/a+?+/
+Failed: nothing to repeat at offset 3
+
+/a{2,3}?+b/
+Failed: nothing to repeat at offset 7
+
+/(?U)a+?+/
+Failed: nothing to repeat at offset 7
+
+/a{2,3}?+b/U
+Failed: nothing to repeat at offset 7
+
+/x(?U)a++b/D
+------------------------------------------------------------------
+  0  17 Bra 0
+  3   1 x
+  6   5 Once
+  9     a+
+ 11   5 Ket
+ 14   1 b
+ 17  17 Ket
+ 20     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 'x'
+Need char = 'b'
+    xaaaab
+ 0: xaaaab
+
+/(?U)xa++b/D
+------------------------------------------------------------------
+  0  17 Bra 0
+  3   1 x
+  6   5 Once
+  9     a+
+ 11   5 Ket
+ 14   1 b
+ 17  17 Ket
+ 20     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: ungreedy
+First char = 'x'
+Need char = 'b'
+    xaaaab
+ 0: xaaaab
+
+/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/D
+------------------------------------------------------------------
+  0 106 Bra 0
+  3     ^
+  4  99 Bra 1
+  7   5 Bra 2
+ 10     a+
+ 12   5 Ket
+ 15  37 Bra 3
+ 18     [a-b]+?
+ 52  37 Ket
+ 55  37 Bra 4
+ 58     [b-c]+
+ 92  37 Ket
+ 95   5 Bra 5
+ 98     \w*
+100   5 Ket
+103  99 Ket
+106 106 Ket
+109     End
+------------------------------------------------------------------
+Capturing subpattern count = 5
+Options: anchored
+No first char
+No need char
+
+/^x(?U)a+b/D
+------------------------------------------------------------------
+  0  12 Bra 0
+  3     ^
+  4   1 x
+  7     a+?
+  9   1 b
+ 12  12 Ket
+ 15     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored
+No first char
+Need char = 'b'
+
+/^x(?U)(a+)b/D
+------------------------------------------------------------------
+  0  18 Bra 0
+  3     ^
+  4   1 x
+  7   5 Bra 1
+ 10     a+?
+ 12   5 Ket
+ 15   1 b
+ 18  18 Ket
+ 21     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: anchored
+No first char
+Need char = 'b'
+
+/[.x.]/
+Failed: POSIX collating elements are not supported at offset 0
+
+/[=x=]/
+Failed: POSIX collating elements are not supported at offset 0
+
+/[:x:]/
+Failed: POSIX named classes are supported only within a class at offset 0
+
+/\l/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\L/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\N{name}/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\pP/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\PP/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\p{prop}/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\P{prop}/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\u/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\U/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/\X/
+Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+
+/[/
+Failed: missing terminating ] for character class at offset 1
+
+/[a-/
+Failed: missing terminating ] for character class at offset 3
+
+/[[:space:]/
+Failed: missing terminating ] for character class at offset 10
+
+/[\s]/DM
+Memory allocation (code space): 40
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x09-\x0a\x0c-\x0d ]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[[:space:]]/DM
+Memory allocation (code space): 40
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x09-\x0d ]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[[:space:]abcde]/DM
+Memory allocation (code space): 40
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x09-\x0d a-e]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/< (?: (?(R) \d++  | [^<>]*+) | (?R)) * >/x
+Capturing subpattern count = 0
+Options: extended
+First char = '<'
+Need char = '>'
+    <>
+ 0: <>
+    <abcd>
+ 0: <abcd>
+    <abc <123> hij>
+ 0: <abc <123> hij>
+    <abc <def> hij>
+ 0: <def>
+    <abc<>def> 
+ 0: <abc<>def>
+    <abc<>      
+ 0: <>
+    *** Failers
+No match
+    <abc
+No match
+
+|8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+Memory allocation (code space): 421
+------------------------------------------------------------------
+  0 417 Bra 0
+  3 250 8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:
+255 159 x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+416     \b
+417 417 Ket
+420     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = '8'
+Need char = 'X'
+
+|\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+Memory allocation (code space): 416
+------------------------------------------------------------------
+  0 412 Bra 0
+  3 250 $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[
+255 154 %z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+411     \b
+412 412 Ket
+415     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = '$'
+Need char = 'X'
+
+/(.*)\d+\1/I
+Capturing subpattern count = 1
+Max back reference = 1
+No options
+No first char
+No need char
+
+/(.*)\d+/I
+Capturing subpattern count = 1
+No options
+First char at start or follows \n
+No need char
+    
+/(.*)\d+\1/Is
+Capturing subpattern count = 1
+Max back reference = 1
+Options: dotall
+No first char
+No need char
+
+/(.*)\d+/Is
+Capturing subpattern count = 1
+Options: anchored dotall
+No first char
+No need char
+
+/(.*(xyz))\d+\2/I
+Capturing subpattern count = 2
+Max back reference = 2
+No options
+First char at start or follows \n
+Need char = 'z'
+
+/((.*))\d+\1/I
+Capturing subpattern count = 2
+Max back reference = 1
+No options
+No first char
+No need char
+    abc123bc
+ 0: bc123bc
+ 1: bc
+ 2: bc
+    
+/a[b]/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/(?=a).*/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/(?=abc).xyz/iI
+Capturing subpattern count = 0
+Options: caseless
+First char = 'a' (caseless)
+Need char = 'z' (caseless)
+
+/(?=abc)(?i).xyz/I
+Capturing subpattern count = 0
+No options
+Case state changes
+First char = 'a'
+Need char = 'z' (caseless)
+
+/(?=a)(?=b)/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/(?=.)a/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/((?=abcda)a)/I
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'a'
+
+/((?=abcda)ab)/I
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+
+/()a/I
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'a'
+
+/(?(1)ab|ac)/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/(?(1)abz|acz)/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'z'
+
+/(?(1)abz)/I
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/(?(1)abz)123/I
+Capturing subpattern count = 0
+No options
+No first char
+Need char = '3'
+
+/(a)+/I
+Capturing subpattern count = 1
+No options
+First char = 'a'
+No need char
+
+/(a){2,3}/I
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'a'
+
+/(a)*/I
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+
+/[a]/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+No need char
+
+/[ab]/I
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[ab]/IS
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b 
+
+/[^a]/I
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/\d456/I
+Capturing subpattern count = 0
+No options
+No first char
+Need char = '6'
+
+/\d456/IS
+Capturing subpattern count = 0
+No options
+No first char
+Need char = '6'
+Starting character set: 0 1 2 3 4 5 6 7 8 9 
+
+/a^b/I
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/^a/mI
+Capturing subpattern count = 0
+Options: multiline
+First char at start or follows \n
+Need char = 'a'
+  abcde
+ 0: a
+  xy\nabc 
+ 0: a
+  *** Failers 
+No match
+  xyabc 
+No match
+
+/c|abc/I
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'c'
+
+/(?i)[ab]/IS
+Capturing subpattern count = 0
+Options: caseless
+No first char
+No need char
+Starting character set: A B a b 
+
+/[ab](?i)cd/IS
+Capturing subpattern count = 0
+No options
+Case state changes
+No first char
+Need char = 'd' (caseless)
+Starting character set: a b 
+
+/abc(?C)def/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'f'
+    abcdef
+--->abcdef
+  0 ^  ^
+ 0: abcdef
+    1234abcdef 
+--->1234abcdef
+  0     ^  ^
+ 0: abcdef
+    *** Failers
+No match
+    abcxyz
+No match
+    abcxyzf   
+--->abcxyzf
+  0 ^  ^
+No match
+
+/abc(?C)de(?C1)f/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'f'
+    123abcdef
+--->123abcdef
+  0    ^  ^
+  1    ^    ^
+ 0: abcdef
+    
+/(?C1)\dabc(?C2)def/ 
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'f'
+    1234abcdef
+--->1234abcdef
+  1 ^
+  1  ^
+  1   ^
+  1    ^
+  2    ^   ^
+ 0: 4abcdef
+    *** Failers
+No match
+    abcdef 
+--->abcdef
+  1 ^
+  1  ^
+  1   ^
+  1    ^
+  1     ^
+  1      ^
+No match
+    
+/(?C255)ab/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'b'
+
+/(?C256)ab/
+Failed: number after (?C is > 255 at offset 6
+
+/(?Cab)xx/ 
+Failed: closing ) for (?C expected at offset 3
+
+/(?C12vr)x/
+Failed: closing ) for (?C expected at offset 5
+
+/abc(?C)def/
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'f'
+    *** Failers
+No match
+    \x83\x0\x61bcdef
+--->\x83\x00abcdef
+  0         ^  ^
+ 0: abcdef
+
+/(abc)(?C)de(?C1)f/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'f'
+    123abcdef
+--->123abcdef
+  0    ^  ^
+  1    ^    ^
+ 0: abcdef
+ 1: abc
+    123abcdef\C+ 
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: abc
+--->123abcdef
+       ^  ^
+Callout 1: last capture = 1
+ 0: <unset>
+ 1: abc
+--->123abcdef
+       ^    ^
+ 0: abcdef
+ 1: abc
+    123abcdef\C- 
+ 0: abcdef
+ 1: abc
+    *** Failers
+No match
+    123abcdef\C!1 
+--->123abcdef
+  0    ^  ^
+  1    ^    ^
+No match
+    
+/(?C0)(abc(?C1))*/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    abcabcabc
+--->abcabcabc
+  0 ^
+  1 ^  ^
+  1 ^     ^
+  1 ^        ^
+ 0: abcabcabc
+ 1: abc
+    abcabc\C!1!3   
+--->abcabc
+  0 ^
+  1 ^  ^
+  1 ^     ^
+ 0: abcabc
+ 1: abc
+    *** Failers
+--->*** Failers
+  0 ^
+ 0: 
+    abcabcabc\C!1!3   
+--->abcabcabc
+  0 ^
+  1 ^  ^
+  1 ^     ^
+  1 ^        ^
+ 0: abcabc
+ 1: abc
+
+/(\d{3}(?C))*/
+Capturing subpattern count = 1
+No options
+No first char
+No need char
+    123\C+
+Callout 0: last capture = -1
+ 0: <unset>
+--->123
+    ^  ^
+ 0: 123
+ 1: 123
+    123456\C+
+Callout 0: last capture = -1
+ 0: <unset>
+--->123456
+    ^  ^
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: 123
+--->123456
+    ^     ^
+ 0: 123456
+ 1: 456
+    123456789\C+  
+Callout 0: last capture = -1
+ 0: <unset>
+--->123456789
+    ^  ^
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: 123
+--->123456789
+    ^     ^
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: 456
+--->123456789
+    ^        ^
+ 0: 123456789
+ 1: 789
+
+/((xyz)(?C)p|(?C1)xyzabc)/
+Capturing subpattern count = 2
+No options
+First char = 'x'
+No need char
+    xyzabc\C+
+Callout 0: last capture = 2
+ 0: <unset>
+ 1: <unset>
+ 2: xyz
+--->xyzabc
+    ^  ^
+Callout 1: last capture = -1
+ 0: <unset>
+--->xyzabc
+    ^
+ 0: xyzabc
+ 1: xyzabc
+
+/(X)((xyz)(?C)p|(?C1)xyzabc)/
+Capturing subpattern count = 3
+No options
+First char = 'X'
+Need char = 'x'
+    Xxyzabc\C+
+Callout 0: last capture = 3
+ 0: <unset>
+ 1: X
+ 2: <unset>
+ 3: xyz
+--->Xxyzabc
+    ^   ^
+Callout 1: last capture = 1
+ 0: <unset>
+ 1: X
+--->Xxyzabc
+    ^^
+ 0: Xxyzabc
+ 1: X
+ 2: xyzabc
+
+/(?=(abc))(?C)abcdef/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'f'
+    abcdef\C+
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: abc
+--->abcdef
+    ^
+ 0: abcdef
+ 1: abc
+    
+/(?!(abc)(?C1)d)(?C2)abcxyz/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'z'
+    abcxyz\C+ 
+Callout 1: last capture = 1
+ 0: <unset>
+ 1: abc
+--->abcxyz
+    ^  ^
+Callout 2: last capture = -1
+ 0: <unset>
+--->abcxyz
+    ^
+ 0: abcxyz
+
+/(?<=(abc)(?C))xyz/
+Capturing subpattern count = 1
+No options
+First char = 'x'
+Need char = 'z'
+   abcxyz\C+
+Callout 0: last capture = 1
+ 0: <unset>
+ 1: abc
+--->abcxyz
+       ^
+ 0: xyz
+ 1: abc
+   
+/(?C)abc/ 
+Capturing subpattern count = 0
+No options
+First char = 'a'
+Need char = 'c'
+
+/(?C)^abc/
+Capturing subpattern count = 0
+Options: anchored
+No first char
+No need char
+
+/(?C)a|b/S
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: a b 
+
+/(?R)/
+Failed: recursive call could loop indefinitely at offset 3
+
+/(a|(?R))/
+Failed: recursive call could loop indefinitely at offset 6
+
+/(ab|(bc|(de|(?R))))/
+Failed: recursive call could loop indefinitely at offset 15
+
+/x(ab|(bc|(de|(?R))))/
+Capturing subpattern count = 3
+No options
+First char = 'x'
+No need char
+    xab
+ 0: xab
+ 1: ab
+    xbc
+ 0: xbc
+ 1: bc
+ 2: bc
+    xde
+ 0: xde
+ 1: de
+ 2: de
+ 3: de
+    xxab
+ 0: xxab
+ 1: xab
+ 2: xab
+ 3: xab
+    xxxab
+ 0: xxxab
+ 1: xxab
+ 2: xxab
+ 3: xxab
+    *** Failers
+No match
+    xyab   
+No match
+
+/(ab|(bc|(de|(?1))))/
+Failed: recursive call could loop indefinitely at offset 15
+
+/x(ab|(bc|(de|(?1)x)x)x)/
+Failed: recursive call could loop indefinitely at offset 16
+
+/^([^()]|\((?1)*\))*$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    abc
+ 0: abc
+ 1: c
+    a(b)c
+ 0: a(b)c
+ 1: c
+    a(b(c))d  
+ 0: a(b(c))d
+ 1: d
+    *** Failers)
+No match
+    a(b(c)d  
+No match
+
+/^>abc>([^()]|\((?1)*\))*<xyz<$/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+Need char = '<'
+   >abc>123<xyz<
+ 0: >abc>123<xyz<
+ 1: 3
+   >abc>1(2)3<xyz<
+ 0: >abc>1(2)3<xyz<
+ 1: 3
+   >abc>(1(2)3)<xyz<
+ 0: >abc>(1(2)3)<xyz<
+ 1: (1(2)3)
+
+/(a(?1)b)/D
+------------------------------------------------------------------
+  0  18 Bra 0
+  3  12 Bra 1
+  6   1 a
+  9   3 Recurse
+ 12   1 b
+ 15  12 Ket
+ 18  18 Ket
+ 21     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+
+/(a(?1)+b)/D
+------------------------------------------------------------------
+  0  24 Bra 0
+  3  18 Bra 1
+  6   1 a
+  9   6 Bra 0
+ 12   3 Recurse
+ 15   6 KetRmax
+ 18   1 b
+ 21  18 Ket
+ 24  24 Ket
+ 27     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+
+/^\W*(?:((.)\W*(?1)\W*\2|)|((.)\W*(?3)\W*\4|\W*.\W*))\W*$/i
+Capturing subpattern count = 4
+Max back reference = 4
+Options: anchored caseless
+No first char
+No need char
+    1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+    Satan, oscillate my metallic sonatas!
+ 0: Satan, oscillate my metallic sonatas!
+ 1: <unset>
+ 2: <unset>
+ 3: Satan, oscillate my metallic sonatas
+ 4: S
+    A man, a plan, a canal: Panama!
+ 0: A man, a plan, a canal: Panama!
+ 1: <unset>
+ 2: <unset>
+ 3: A man, a plan, a canal: Panama
+ 4: A
+    Able was I ere I saw Elba. 
+ 0: Able was I ere I saw Elba.
+ 1: <unset>
+ 2: <unset>
+ 3: Able was I ere I saw Elba
+ 4: A
+    *** Failers
+No match
+    The quick brown fox  
+No match
+    
+/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    12
+ 0: 12
+ 1: 12
+    (((2+2)*-3)-7)
+ 0: (((2+2)*-3)-7)
+ 1: (((2+2)*-3)-7)
+ 2: -
+    -12
+ 0: -12
+ 1: -12
+    *** Failers
+No match
+    ((2+2)*-3)-7)
+No match
+         
+/^(x(y|(?1){2})z)/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    xyz
+ 0: xyz
+ 1: xyz
+ 2: y
+    xxyzxyzz 
+ 0: xxyzxyzz
+ 1: xxyzxyzz
+ 2: xyzxyz
+    *** Failers
+No match
+    xxyzz
+No match
+    xxyzxyzxyzz   
+No match
+
+/((< (?: (?(R) \d++  | [^<>]*+) | (?2)) * >))/x
+Capturing subpattern count = 2
+Options: extended
+First char = '<'
+Need char = '>'
+    <>
+ 0: <>
+ 1: <>
+ 2: <>
+    <abcd>
+ 0: <abcd>
+ 1: <abcd>
+ 2: <abcd>
+    <abc <123> hij>
+ 0: <abc <123> hij>
+ 1: <abc <123> hij>
+ 2: <abc <123> hij>
+    <abc <def> hij>
+ 0: <def>
+ 1: <def>
+ 2: <def>
+    <abc<>def> 
+ 0: <abc<>def>
+ 1: <abc<>def>
+ 2: <abc<>def>
+    <abc<>      
+ 0: <>
+ 1: <>
+ 2: <>
+    *** Failers
+No match
+    <abc
+No match
+
+/(?1)/
+Failed: reference to non-existent subpattern at offset 3
+
+/((?2)(abc)/
+Failed: reference to non-existent subpattern at offset 4
+
+/^(abc)def(?1)/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    abcdefabc
+ 0: abcdefabc
+ 1: abc
+
+/^(a|b|c)=(?1)+/
+Capturing subpattern count = 1
+Options: anchored
+No first char
+No need char
+    a=a
+ 0: a=a
+ 1: a
+    a=b
+ 0: a=b
+ 1: a
+    a=bc  
+ 0: a=bc
+ 1: a
+
+/^(a|b|c)=((?1))+/
+Capturing subpattern count = 2
+Options: anchored
+No first char
+No need char
+    a=a
+ 0: a=a
+ 1: a
+ 2: a
+    a=b
+ 0: a=b
+ 1: a
+ 2: b
+    a=bc  
+ 0: a=bc
+ 1: a
+ 2: c
+
+/a(?P<name1>b|c)d(?P<longername2>e)/D
+------------------------------------------------------------------
+  0  33 Bra 0
+  3   1 a
+  6   6 Bra 1
+  9   1 b
+ 12   6 Alt
+ 15   1 c
+ 18  12 Ket
+ 21   1 d
+ 24   6 Bra 2
+ 27   1 e
+ 30   6 Ket
+ 33  33 Ket
+ 36     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+  longername2   2
+  name1         1
+No options
+First char = 'a'
+Need char = 'e'
+    abde
+ 0: abde
+ 1: b
+ 2: e
+    acde 
+ 0: acde
+ 1: c
+ 2: e
+
+/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/D
+------------------------------------------------------------------
+  0  39 Bra 0
+  3  24 Bra 0
+  6   1 a
+  9  15 Bra 1
+ 12   1 c
+ 15   6 Bra 2
+ 18   1 d
+ 21   6 Ket
+ 24  15 Ket
+ 27  24 Ket
+ 30   6 Bra 3
+ 33   1 a
+ 36   6 Ket
+ 39  39 Ket
+ 42     End
+------------------------------------------------------------------
+Capturing subpattern count = 3
+Named capturing subpatterns:
+  a   3
+  c   1
+  d   2
+No options
+First char = 'a'
+Need char = 'a'
+
+/(?P<a>a)...(?P=a)bbb(?P>a)d/D
+------------------------------------------------------------------
+  0  29 Bra 0
+  3   6 Bra 1
+  6   1 a
+  9   6 Ket
+ 12     Any
+ 13     Any
+ 14     Any
+ 15     \1
+ 18   3 bbb
+ 23   3 Recurse
+ 26   1 d
+ 29  29 Ket
+ 32     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Max back reference = 1
+Named capturing subpatterns:
+  a   1
+No options
+First char = 'a'
+Need char = 'd'
+
+/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/i
+Capturing subpattern count = 4
+Max back reference = 4
+Named capturing subpatterns:
+  four    4
+  one     1
+  three   3
+  two     2
+Options: anchored caseless
+No first char
+No need char
+    1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+    Satan, oscillate my metallic sonatas!
+ 0: Satan, oscillate my metallic sonatas!
+ 1: <unset>
+ 2: <unset>
+ 3: Satan, oscillate my metallic sonatas
+ 4: S
+    A man, a plan, a canal: Panama!
+ 0: A man, a plan, a canal: Panama!
+ 1: <unset>
+ 2: <unset>
+ 3: A man, a plan, a canal: Panama
+ 4: A
+    Able was I ere I saw Elba. 
+ 0: Able was I ere I saw Elba.
+ 1: <unset>
+ 2: <unset>
+ 3: Able was I ere I saw Elba
+ 4: A
+    *** Failers
+No match
+    The quick brown fox  
+No match
+    
+/((?(R)a|b))\1(?1)?/
+Capturing subpattern count = 1
+Max back reference = 1
+No options
+No first char
+No need char
+  bb
+ 0: bb
+ 1: b
+  bbaa 
+ 0: bba
+ 1: b
+
+/(.*)a/sI
+Capturing subpattern count = 1
+Options: anchored dotall
+No first char
+Need char = 'a'
+
+/(.*)a\1/sI
+Capturing subpattern count = 1
+Max back reference = 1
+Options: dotall
+No first char
+Need char = 'a'
+
+/(.*)a(b)\2/sI
+Capturing subpattern count = 2
+Max back reference = 2
+Options: anchored dotall
+No first char
+Need char = 'b'
+
+/((.*)a|(.*)b)z/sI
+Capturing subpattern count = 3
+Options: anchored dotall
+No first char
+Need char = 'z'
+
+/((.*)a|(.*)b)z\1/sI
+Capturing subpattern count = 3
+Max back reference = 1
+Options: dotall
+No first char
+Need char = 'z'
+
+/((.*)a|(.*)b)z\2/sI
+Capturing subpattern count = 3
+Max back reference = 2
+Options: dotall
+No first char
+Need char = 'z'
+
+/((.*)a|(.*)b)z\3/sI
+Capturing subpattern count = 3
+Max back reference = 3
+Options: dotall
+No first char
+Need char = 'z'
+
+/((.*)a|^(.*)b)z\3/sI
+Capturing subpattern count = 3
+Max back reference = 3
+Options: anchored dotall
+No first char
+Need char = 'z'
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/sI
+Capturing subpattern count = 31
+Options: anchored dotall
+No first char
+No need char
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/sI
+Capturing subpattern count = 31
+Max back reference = 31
+Options: dotall
+No first char
+No need char
+
+/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/sI
+Capturing subpattern count = 32
+Max back reference = 32
+Options: dotall
+No first char
+No need char
+
+/(a)(bc)/ND
+------------------------------------------------------------------
+  0  22 Bra 0
+  3   6 Bra 0
+  6   1 a
+  9   6 Ket
+ 12   7 Bra 0
+ 15   2 bc
+ 19   7 Ket
+ 22  22 Ket
+ 25     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options:
+First char = 'a'
+Need char = 'c'
+  abc
+ 0: abc
+
+/(?P<one>a)(bc)/ND
+------------------------------------------------------------------
+  0  22 Bra 0
+  3   6 Bra 1
+  6   1 a
+  9   6 Ket
+ 12   7 Bra 0
+ 15   2 bc
+ 19   7 Ket
+ 22  22 Ket
+ 25     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Named capturing subpatterns:
+  one   1
+Options:
+First char = 'a'
+Need char = 'c'
+  abc
+ 0: abc
+ 1: a
+
+/(a)(?P<named>bc)/ND
+------------------------------------------------------------------
+  0  22 Bra 0
+  3   6 Bra 0
+  6   1 a
+  9   6 Ket
+ 12   7 Bra 1
+ 15   2 bc
+ 19   7 Ket
+ 22  22 Ket
+ 25     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Named capturing subpatterns:
+  named   1
+Options:
+First char = 'a'
+Need char = 'c'
+
+/(a+)*zz/
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'z'
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazzbbbbbb\M
+Minimum match limit = 8
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaazz
+ 1: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+  aaaaaaaaaaaaaz\M
+Minimum match limit = 32768
+No match
+
+/(aaa(?C1)bbb|ab)/
+Capturing subpattern count = 1
+No options
+First char = 'a'
+Need char = 'b'
+   aaabbb
+--->aaabbb
+  1 ^  ^
+ 0: aaabbb
+ 1: aaabbb
+   aaabbb\C*0
+--->aaabbb
+  1 ^  ^
+ 0: aaabbb
+ 1: aaabbb
+   aaabbb\C*1
+--->aaabbb
+  1 ^  ^
+Callout data = 1
+ 0: ab
+ 1: ab
+   aaabbb\C*-1
+--->aaabbb
+  1 ^  ^
+Callout data = -1
+No match
+
+/ab(?P<one>cd)ef(?P<two>gh)/
+Capturing subpattern count = 2
+Named capturing subpatterns:
+  one   1
+  two   2
+No options
+First char = 'a'
+Need char = 'h'
+    abcdefgh
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+    abcdefgh\C1\Gtwo
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+ 1C cd (2)
+ 2G gh (2)
+    abcdefgh\Cone\Ctwo
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+ 1C cd (2)
+ 2C gh (2)
+    abcdefgh\Cthree  
+no parentheses with name "three"
+ 0: abcdefgh
+ 1: cd
+ 2: gh
+
+/(?P<Tes>)(?P<Test>)/D
+------------------------------------------------------------------
+  0  15 Bra 0
+  3   3 Bra 1
+  6   3 Ket
+  9   3 Bra 2
+ 12   3 Ket
+ 15  15 Ket
+ 18     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+  Tes    1
+  Test   2
+No options
+No first char
+No need char
+
+/(?P<Test>)(?P<Tes>)/D
+------------------------------------------------------------------
+  0  15 Bra 0
+  3   3 Bra 1
+  6   3 Ket
+  9   3 Bra 2
+ 12   3 Ket
+ 15  15 Ket
+ 18     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Named capturing subpatterns:
+  Tes    2
+  Test   1
+No options
+No first char
+No need char
+
+/(?P<Z>zz)(?P<A>aa)/
+Capturing subpattern count = 2
+Named capturing subpatterns:
+  A   2
+  Z   1
+No options
+First char = 'z'
+Need char = 'a'
+    zzaa\CZ
+ 0: zzaa
+ 1: zz
+ 2: aa
+ 1C zz (2)
+    zzaa\CA
+ 0: zzaa
+ 1: zz
+ 2: aa
+ 2C aa (2)
+
+/(?P<x>eks)(?P<x>eccs)/
+Failed: two named groups have the same name at offset 16
+
+/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/
+Failed: two named groups have the same name at offset 31
+
+"\[((?P<elem>\d+)(,(?P>elem))*)\]"
+Capturing subpattern count = 3
+Named capturing subpatterns:
+  elem   2
+No options
+First char = '['
+Need char = ']'
+    [10,20,30,5,5,4,4,2,43,23,4234]
+ 0: [10,20,30,5,5,4,4,2,43,23,4234]
+ 1: 10,20,30,5,5,4,4,2,43,23,4234
+ 2: 10
+ 3: ,4234
+    *** Failers
+No match
+    []  
+No match
+
+"\[((?P<elem>\d+)(,(?P>elem))*)?\]"
+Capturing subpattern count = 3
+Named capturing subpatterns:
+  elem   2
+No options
+First char = '['
+Need char = ']'
+    [10,20,30,5,5,4,4,2,43,23,4234]
+ 0: [10,20,30,5,5,4,4,2,43,23,4234]
+ 1: 10,20,30,5,5,4,4,2,43,23,4234
+ 2: 10
+ 3: ,4234
+    [] 
+ 0: []
+
+/(a(b(?2)c))?/D
+------------------------------------------------------------------
+  0  28 Bra 0
+  3     Brazero
+  4  21 Bra 1
+  7   1 a
+ 10  12 Bra 2
+ 13   1 b
+ 16  10 Recurse
+ 19   1 c
+ 22  12 Ket
+ 25  21 Ket
+ 28  28 Ket
+ 31     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+No options
+No first char
+No need char
+
+/(a(b(?2)c))*/D
+------------------------------------------------------------------
+  0  28 Bra 0
+  3     Brazero
+  4  21 Bra 1
+  7   1 a
+ 10  12 Bra 2
+ 13   1 b
+ 16  10 Recurse
+ 19   1 c
+ 22  12 Ket
+ 25  21 KetRmax
+ 28  28 Ket
+ 31     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+No options
+No first char
+No need char
+
+/(a(b(?2)c)){0,2}/D
+------------------------------------------------------------------
+  0  59 Bra 0
+  3     Brazero
+  4  52 Bra 0
+  7  21 Bra 1
+ 10   1 a
+ 13  12 Bra 2
+ 16   1 b
+ 19  13 Recurse
+ 22   1 c
+ 25  12 Ket
+ 28  21 Ket
+ 31     Brazero
+ 32  21 Bra 1
+ 35   1 a
+ 38  12 Bra 2
+ 41   1 b
+ 44  13 Recurse
+ 47   1 c
+ 50  12 Ket
+ 53  21 Ket
+ 56  52 Ket
+ 59  59 Ket
+ 62     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+No options
+No first char
+No need char
+
+/[ab]{1}+/D
+------------------------------------------------------------------
+  0  47 Bra 0
+  3  41 Once
+  6     [a-b]{1,1}
+ 44  41 Ket
+ 47  47 Ket
+ 50     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/i
+Capturing subpattern count = 3
+Options: caseless
+No first char
+Need char = 'g' (caseless)
+     Baby Bjorn Active Carrier - With free SHIPPING!!
+ 0: Baby Bjorn Active Carrier - With free SHIPPING!!
+ 1: Baby Bjorn Active Carrier - With free SHIPPING!!
+
+/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/iS
+Capturing subpattern count = 3
+Options: caseless
+No first char
+Need char = 'g' (caseless)
+Study returned NULL
+     Baby Bjorn Active Carrier - With free SHIPPING!!
+ 0: Baby Bjorn Active Carrier - With free SHIPPING!!
+ 1: Baby Bjorn Active Carrier - With free SHIPPING!!
+     
+/a*.*b/SD
+------------------------------------------------------------------
+  0  10 Bra 0
+  3     a*
+  5     Any*
+  7   1 b
+ 10  10 Ket
+ 13     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+Need char = 'b'
+Study returned NULL
+
+/(a|b)*.?c/SD 
+------------------------------------------------------------------
+  0  24 Bra 0
+  3     Brazero
+  4   6 Bra 1
+  7   1 a
+ 10   6 Alt
+ 13   1 b
+ 16  12 KetRmax
+ 19     Any?
+ 21   1 c
+ 24  24 Ket
+ 27     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+No options
+No first char
+Need char = 'c'
+Study returned NULL
+
+/ End of testinput2 /
+Capturing subpattern count = 0
+No options
+First char = ' '
+Need char = ' '
diff --git a/external-libs/pcre/testdata/testoutput3 b/external-libs/pcre/testdata/testoutput3
new file mode 100644
index 00000000..7d1d6fc6
--- /dev/null
+++ b/external-libs/pcre/testdata/testoutput3
@@ -0,0 +1,115 @@
+PCRE version 4.5 01-December-2003
+
+/^[\w]+/
+    *** Failers
+No match
+    �cole
+No match
+
+/^[\w]+/Lfr_FR
+    �cole
+ 0: �cole
+
+/^[\w]+/
+    *** Failers
+No match
+    �cole
+No match
+
+/^[\W]+/
+    �cole
+ 0: \xc9
+
+/^[\W]+/Lfr_FR
+    *** Failers
+ 0: *** 
+    �cole
+No match
+
+/[\b]/
+    \b
+ 0: \x08
+    *** Failers
+No match
+    a
+No match
+
+/[\b]/Lfr_FR
+    \b
+ 0: \x08
+    *** Failers
+No match
+    a
+No match
+
+/^\w+/
+    *** Failers
+No match
+    �cole
+No match
+
+/^\w+/Lfr_FR
+    �cole
+ 0: �cole
+
+/(.+)\b(.+)/
+    �cole
+ 0: \xc9cole
+ 1: \xc9
+ 2: cole
+
+/(.+)\b(.+)/Lfr_FR
+    *** Failers
+ 0: *** Failers
+ 1: *** 
+ 2: Failers
+    �cole
+No match
+
+/�cole/i
+    �cole
+ 0: \xc9cole
+    *** Failers
+No match
+    �cole
+No match
+
+/�cole/iLfr_FR
+    �cole
+ 0: �cole
+    �cole
+ 0: �cole
+
+/\w/IS
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P 
+  Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z 
+
+/\w/ISLfr_FR
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+Starting character set: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P 
+  Q R S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z 
+  � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 
+  � � � � � � � � � � � � � � � � � � � � � � � � � � 
+
+/^[\xc8-\xc9]/iLfr_FR
+    �cole
+ 0: �
+    �cole
+ 0: �
+
+/^[\xc8-\xc9]/Lfr_FR
+    �cole
+ 0: �
+    *** Failers 
+No match
+    �cole
+No match
+
+/ End of testinput3 /
diff --git a/external-libs/pcre/testdata/testoutput4 b/external-libs/pcre/testdata/testoutput4
new file mode 100644
index 00000000..a0f6c24a
--- /dev/null
+++ b/external-libs/pcre/testdata/testoutput4
@@ -0,0 +1,909 @@
+PCRE version 4.5 01-December-2003
+
+/-- Do not use the \x{} construct except with patterns that have the --/
+/-- /8 option set, because PCRE doesn't recognize them as UTF-8 unless --/
+No match
+/-- that option is set. However, the latest Perls recognize them always. --/
+No match
+
+/a.b/8
+    acb
+ 0: acb
+    a\x7fb
+ 0: a\x{7f}b
+    a\x{100}b 
+ 0: a\x{100}b
+    *** Failers
+No match
+    a\nb  
+No match
+
+/a(.{3})b/8
+    a\x{4000}xyb 
+ 0: a\x{4000}xyb
+ 1: \x{4000}xy
+    a\x{4000}\x7fyb 
+ 0: a\x{4000}\x{7f}yb
+ 1: \x{4000}\x{7f}y
+    a\x{4000}\x{100}yb 
+ 0: a\x{4000}\x{100}yb
+ 1: \x{4000}\x{100}y
+    *** Failers
+No match
+    a\x{4000}b 
+No match
+    ac\ncb 
+No match
+
+/a(.*?)(.)/
+    a\xc0\x88b
+ 0: a\xc0
+ 1: 
+ 2: \xc0
+
+/a(.*?)(.)/8
+    a\x{100}b
+ 0: a\x{100}
+ 1: 
+ 2: \x{100}
+
+/a(.*)(.)/
+    a\xc0\x88b
+ 0: a\xc0\x88b
+ 1: \xc0\x88
+ 2: b
+
+/a(.*)(.)/8
+    a\x{100}b
+ 0: a\x{100}b
+ 1: \x{100}
+ 2: b
+
+/a(.)(.)/
+    a\xc0\x92bcd
+ 0: a\xc0\x92
+ 1: \xc0
+ 2: \x92
+
+/a(.)(.)/8
+    a\x{240}bcd
+ 0: a\x{240}b
+ 1: \x{240}
+ 2: b
+
+/a(.?)(.)/
+    a\xc0\x92bcd
+ 0: a\xc0\x92
+ 1: \xc0
+ 2: \x92
+
+/a(.?)(.)/8
+    a\x{240}bcd
+ 0: a\x{240}b
+ 1: \x{240}
+ 2: b
+
+/a(.??)(.)/
+    a\xc0\x92bcd
+ 0: a\xc0
+ 1: 
+ 2: \xc0
+
+/a(.??)(.)/8
+    a\x{240}bcd
+ 0: a\x{240}
+ 1: 
+ 2: \x{240}
+
+/a(.{3})b/8
+    a\x{1234}xyb 
+ 0: a\x{1234}xyb
+ 1: \x{1234}xy
+    a\x{1234}\x{4321}yb 
+ 0: a\x{1234}\x{4321}yb
+ 1: \x{1234}\x{4321}y
+    a\x{1234}\x{4321}\x{3412}b 
+ 0: a\x{1234}\x{4321}\x{3412}b
+ 1: \x{1234}\x{4321}\x{3412}
+    *** Failers
+No match
+    a\x{1234}b 
+No match
+    ac\ncb 
+No match
+
+/a(.{3,})b/8
+    a\x{1234}xyb 
+ 0: a\x{1234}xyb
+ 1: \x{1234}xy
+    a\x{1234}\x{4321}yb 
+ 0: a\x{1234}\x{4321}yb
+ 1: \x{1234}\x{4321}y
+    a\x{1234}\x{4321}\x{3412}b 
+ 0: a\x{1234}\x{4321}\x{3412}b
+ 1: \x{1234}\x{4321}\x{3412}
+    axxxxbcdefghijb 
+ 0: axxxxbcdefghijb
+ 1: xxxxbcdefghij
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+ 0: a\x{1234}\x{4321}\x{3412}\x{3421}b
+ 1: \x{1234}\x{4321}\x{3412}\x{3421}
+    *** Failers
+No match
+    a\x{1234}b 
+No match
+
+/a(.{3,}?)b/8
+    a\x{1234}xyb 
+ 0: a\x{1234}xyb
+ 1: \x{1234}xy
+    a\x{1234}\x{4321}yb 
+ 0: a\x{1234}\x{4321}yb
+ 1: \x{1234}\x{4321}y
+    a\x{1234}\x{4321}\x{3412}b 
+ 0: a\x{1234}\x{4321}\x{3412}b
+ 1: \x{1234}\x{4321}\x{3412}
+    axxxxbcdefghijb 
+ 0: axxxxb
+ 1: xxxx
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+ 0: a\x{1234}\x{4321}\x{3412}\x{3421}b
+ 1: \x{1234}\x{4321}\x{3412}\x{3421}
+    *** Failers
+No match
+    a\x{1234}b 
+No match
+
+/a(.{3,5})b/8
+    a\x{1234}xyb 
+ 0: a\x{1234}xyb
+ 1: \x{1234}xy
+    a\x{1234}\x{4321}yb 
+ 0: a\x{1234}\x{4321}yb
+ 1: \x{1234}\x{4321}y
+    a\x{1234}\x{4321}\x{3412}b 
+ 0: a\x{1234}\x{4321}\x{3412}b
+ 1: \x{1234}\x{4321}\x{3412}
+    axxxxbcdefghijb 
+ 0: axxxxb
+ 1: xxxx
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+ 0: a\x{1234}\x{4321}\x{3412}\x{3421}b
+ 1: \x{1234}\x{4321}\x{3412}\x{3421}
+    axbxxbcdefghijb 
+ 0: axbxxb
+ 1: xbxx
+    axxxxxbcdefghijb 
+ 0: axxxxxb
+ 1: xxxxx
+    *** Failers
+No match
+    a\x{1234}b 
+No match
+    axxxxxxbcdefghijb 
+No match
+
+/a(.{3,5}?)b/8
+    a\x{1234}xyb 
+ 0: a\x{1234}xyb
+ 1: \x{1234}xy
+    a\x{1234}\x{4321}yb 
+ 0: a\x{1234}\x{4321}yb
+ 1: \x{1234}\x{4321}y
+    a\x{1234}\x{4321}\x{3412}b 
+ 0: a\x{1234}\x{4321}\x{3412}b
+ 1: \x{1234}\x{4321}\x{3412}
+    axxxxbcdefghijb 
+ 0: axxxxb
+ 1: xxxx
+    a\x{1234}\x{4321}\x{3412}\x{3421}b 
+ 0: a\x{1234}\x{4321}\x{3412}\x{3421}b
+ 1: \x{1234}\x{4321}\x{3412}\x{3421}
+    axbxxbcdefghijb 
+ 0: axbxxb
+ 1: xbxx
+    axxxxxbcdefghijb 
+ 0: axxxxxb
+ 1: xxxxx
+    *** Failers
+No match
+    a\x{1234}b 
+No match
+    axxxxxxbcdefghijb 
+No match
+
+/^[a\x{c0}]/8
+    *** Failers
+No match
+    \x{100}
+No match
+
+/(?<=aXb)cd/8
+    aXbcd
+ 0: cd
+
+/(?<=a\x{100}b)cd/8
+    a\x{100}bcd
+ 0: cd
+
+/(?<=a\x{100000}b)cd/8
+    a\x{100000}bcd
+ 0: cd
+    
+/(?:\x{100}){3}b/8
+    \x{100}\x{100}\x{100}b
+ 0: \x{100}\x{100}\x{100}b
+    *** Failers 
+No match
+    \x{100}\x{100}b
+No match
+
+/\x{ab}/8
+    \x{ab} 
+ 0: \x{ab}
+    \xc2\xab
+ 0: \x{ab}
+    *** Failers 
+No match
+    \x00{ab}
+No match
+
+/(?<=(.))X/8
+    WXYZ
+ 0: X
+ 1: W
+    \x{256}XYZ 
+ 0: X
+ 1: \x{256}
+    *** Failers
+No match
+    XYZ 
+No match
+
+/X(\C{3})/8
+    X\x{1234}
+ 0: X\x{1234}
+ 1: \x{1234}
+
+/X(\C{4})/8
+    X\x{1234}YZ
+ 0: X\x{1234}Y
+ 1: \x{1234}Y
+    
+/X\C*/8
+    XYZabcdce
+ 0: XYZabcdce
+    
+/X\C*?/8
+    XYZabcde
+ 0: X
+    
+/X\C{3,5}/8
+    Xabcdefg   
+ 0: Xabcde
+    X\x{1234} 
+ 0: X\x{1234}
+    X\x{1234}YZ
+ 0: X\x{1234}YZ
+    X\x{1234}\x{512}  
+ 0: X\x{1234}\x{512}
+    X\x{1234}\x{512}YZ
+ 0: X\x{1234}\x{512}
+
+/X\C{3,5}?/8
+    Xabcdefg   
+ 0: Xabc
+    X\x{1234} 
+ 0: X\x{1234}
+    X\x{1234}YZ
+ 0: X\x{1234}
+    X\x{1234}\x{512}  
+ 0: X\x{1234}
+
+/[^a]+/8g
+    bcd
+ 0: bcd
+    \x{100}aY\x{256}Z 
+ 0: \x{100}
+ 0: Y\x{256}Z
+    
+/^[^a]{2}/8
+    \x{100}bc
+ 0: \x{100}b
+ 
+/^[^a]{2,}/8
+    \x{100}bcAa
+ 0: \x{100}bcA
+
+/^[^a]{2,}?/8
+    \x{100}bca
+ 0: \x{100}b
+
+/[^a]+/8ig
+    bcd
+ 0: bcd
+    \x{100}aY\x{256}Z 
+ 0: \x{100}
+ 0: Y\x{256}Z
+    
+/^[^a]{2}/8i
+    \x{100}bc
+ 0: \x{100}b
+ 
+/^[^a]{2,}/8i
+    \x{100}bcAa
+ 0: \x{100}bc
+
+/^[^a]{2,}?/8i
+    \x{100}bca
+ 0: \x{100}b
+
+/\x{100}{0,0}/8
+    abcd
+ 0: 
+ 
+/\x{100}?/8
+    abcd
+ 0: 
+    \x{100}\x{100} 
+ 0: \x{100}
+
+/\x{100}{0,3}/8 
+    \x{100}\x{100} 
+ 0: \x{100}\x{100}
+    \x{100}\x{100}\x{100}\x{100} 
+ 0: \x{100}\x{100}\x{100}
+    
+/\x{100}*/8
+    abce
+ 0: 
+    \x{100}\x{100}\x{100}\x{100} 
+ 0: \x{100}\x{100}\x{100}\x{100}
+
+/\x{100}{1,1}/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+ 0: \x{100}
+
+/\x{100}{1,3}/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+ 0: \x{100}\x{100}\x{100}
+
+/\x{100}+/8
+    abcd\x{100}\x{100}\x{100}\x{100} 
+ 0: \x{100}\x{100}\x{100}\x{100}
+
+/\x{100}{3}/8
+    abcd\x{100}\x{100}\x{100}XX
+ 0: \x{100}\x{100}\x{100}
+
+/\x{100}{3,5}/8
+    abcd\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}XX
+ 0: \x{100}\x{100}\x{100}\x{100}\x{100}
+
+/\x{100}{3,}/8
+    abcd\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}XX
+ 0: \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
+
+/(?<=a\x{100}{2}b)X/8+
+    Xyyya\x{100}\x{100}bXzzz
+ 0: X
+ 0+ zzz
+
+/\D*/8
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+
+/\D*/8
+  \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
+ 0: \x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}\x{100}
+
+/\D/8
+    1X2
+ 0: X
+    1\x{100}2 
+ 0: \x{100}
+  
+/>\S/8
+    > >X Y
+ 0: >X
+    > >\x{100} Y
+ 0: >\x{100}
+  
+/\W/8
+    A.B
+ 0: .
+    A\x{100}B 
+ 0: \x{100}
+  
+/\d/8
+    \x{100}3
+ 0: 3
+    
+/\s/8
+    \x{100} X
+ 0:  
+    
+/\w/8
+    \x{100}X   
+ 0: X
+
+/\D+/8
+    12abcd34
+ 0: abcd
+    *** Failers
+ 0: *** Failers
+    1234  
+No match
+
+/\D{2,3}/8
+    12abcd34
+ 0: abc
+    12ab34
+ 0: ab
+    *** Failers  
+ 0: ***
+    1234
+No match
+    12a34  
+No match
+
+/\D{2,3}?/8
+    12abcd34
+ 0: ab
+    12ab34
+ 0: ab
+    *** Failers  
+ 0: **
+    1234
+No match
+    12a34  
+No match
+
+/\d+/8
+    12abcd34
+ 0: 12
+    *** Failers
+No match
+
+/\d{2,3}/8
+    12abcd34
+ 0: 12
+    1234abcd
+ 0: 123
+    *** Failers  
+No match
+    1.4 
+No match
+
+/\d{2,3}?/8
+    12abcd34
+ 0: 12
+    1234abcd
+ 0: 12
+    *** Failers  
+No match
+    1.4 
+No match
+
+/\S+/8
+    12abcd34
+ 0: 12abcd34
+    *** Failers
+ 0: ***
+    \    \ 
+No match
+
+/\S{2,3}/8
+    12abcd34
+ 0: 12a
+    1234abcd
+ 0: 123
+    *** Failers
+ 0: ***
+    \     \  
+No match
+
+/\S{2,3}?/8
+    12abcd34
+ 0: 12
+    1234abcd
+ 0: 12
+    *** Failers
+ 0: **
+    \     \  
+No match
+
+/>\s+</8+
+    12>      <34
+ 0: >      <
+ 0+ 34
+    *** Failers
+No match
+
+/>\s{2,3}</8+
+    ab>  <cd
+ 0: >  <
+ 0+ cd
+    ab>   <ce
+ 0: >   <
+ 0+ ce
+    *** Failers
+No match
+    ab>    <cd 
+No match
+
+/>\s{2,3}?</8+
+    ab>  <cd
+ 0: >  <
+ 0+ cd
+    ab>   <ce
+ 0: >   <
+ 0+ ce
+    *** Failers
+No match
+    ab>    <cd 
+No match
+
+/\w+/8
+    12      34
+ 0: 12
+    *** Failers
+ 0: Failers
+    +++=*! 
+No match
+
+/\w{2,3}/8
+    ab  cd
+ 0: ab
+    abcd ce
+ 0: abc
+    *** Failers
+ 0: Fai
+    a.b.c
+No match
+
+/\w{2,3}?/8
+    ab  cd
+ 0: ab
+    abcd ce
+ 0: ab
+    *** Failers
+ 0: Fa
+    a.b.c
+No match
+
+/\W+/8
+    12====34
+ 0: ====
+    *** Failers
+ 0: *** 
+    abcd 
+No match
+
+/\W{2,3}/8
+    ab====cd
+ 0: ===
+    ab==cd
+ 0: ==
+    *** Failers
+ 0: ***
+    a.b.c
+No match
+
+/\W{2,3}?/8
+    ab====cd
+ 0: ==
+    ab==cd
+ 0: ==
+    *** Failers
+ 0: **
+    a.b.c
+No match
+
+/[\x{100}]/8
+    \x{100}
+ 0: \x{100}
+    Z\x{100}
+ 0: \x{100}
+    \x{100}Z
+ 0: \x{100}
+    *** Failers 
+No match
+
+/[Z\x{100}]/8
+    Z\x{100}
+ 0: Z
+    \x{100}
+ 0: \x{100}
+    \x{100}Z
+ 0: \x{100}
+    *** Failers 
+No match
+
+/[\x{100}\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   *** Failers  
+No match
+
+/[\x{100}-\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{111}cd 
+ 0: \x{111}
+   *** Failers  
+No match
+
+/[z-\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{111}cd 
+ 0: \x{111}
+   abzcd
+ 0: z
+   ab|cd  
+ 0: |
+   *** Failers  
+No match
+
+/[Q\x{100}\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   Q? 
+ 0: Q
+   *** Failers  
+No match
+
+/[Q\x{100}-\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{111}cd 
+ 0: \x{111}
+   Q? 
+ 0: Q
+   *** Failers  
+No match
+
+/[Qz-\x{200}]/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{111}cd 
+ 0: \x{111}
+   abzcd
+ 0: z
+   ab|cd  
+ 0: |
+   Q? 
+ 0: Q
+   *** Failers  
+No match
+
+/[\x{100}\x{200}]{1,3}/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{200}\x{100}\x{200}\x{100}cd
+ 0: \x{200}\x{100}\x{200}
+   *** Failers  
+No match
+
+/[\x{100}\x{200}]{1,3}?/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{200}\x{100}\x{200}\x{100}cd
+ 0: \x{200}
+   *** Failers  
+No match
+
+/[Q\x{100}\x{200}]{1,3}/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{200}\x{100}\x{200}\x{100}cd
+ 0: \x{200}\x{100}\x{200}
+   *** Failers  
+No match
+
+/[Q\x{100}\x{200}]{1,3}?/8
+   ab\x{100}cd
+ 0: \x{100}
+   ab\x{200}cd
+ 0: \x{200}
+   ab\x{200}\x{100}\x{200}\x{100}cd
+ 0: \x{200}
+   *** Failers  
+No match
+
+/(?<=[\x{100}\x{200}])X/8
+    abc\x{200}X
+ 0: X
+    abc\x{100}X 
+ 0: X
+    *** Failers
+No match
+    X  
+No match
+
+/(?<=[Q\x{100}\x{200}])X/8
+    abc\x{200}X
+ 0: X
+    abc\x{100}X 
+ 0: X
+    abQX 
+ 0: X
+    *** Failers
+No match
+    X  
+No match
+
+/(?<=[\x{100}\x{200}]{3})X/8
+    abc\x{100}\x{200}\x{100}X
+ 0: X
+    *** Failers
+No match
+    abc\x{200}X
+No match
+    X  
+No match
+
+/[^\x{100}\x{200}]X/8
+    AX
+ 0: AX
+    \x{150}X
+ 0: \x{150}X
+    \x{500}X 
+ 0: \x{500}X
+    *** Failers
+No match
+    \x{100}X
+No match
+    \x{200}X   
+No match
+
+/[^Q\x{100}\x{200}]X/8
+    AX
+ 0: AX
+    \x{150}X
+ 0: \x{150}X
+    \x{500}X 
+ 0: \x{500}X
+    *** Failers
+No match
+    \x{100}X
+No match
+    \x{200}X   
+No match
+    QX 
+No match
+
+/[^\x{100}-\x{200}]X/8
+    AX
+ 0: AX
+    \x{500}X 
+ 0: \x{500}X
+    *** Failers
+No match
+    \x{100}X
+No match
+    \x{150}X
+No match
+    \x{200}X   
+No match
+
+/a\Cb/
+    aXb
+ 0: aXb
+    a\nb
+ 0: a\x0ab
+  
+/a\Cb/8
+    aXb
+ 0: aXb
+    a\nb
+ 0: a\x{0a}b
+    *** Failers 
+No match
+    a\x{100}b 
+No match
+
+/[z-\x{100}]/8i
+    z
+ 0: z
+    Z 
+ 0: Z
+    \x{100}
+ 0: \x{100}
+    *** Failers
+No match
+    \x{101}
+No match
+    y    
+No match
+
+/[\xFF]/
+    >\xff<
+ 0: \xff
+
+/[\xff]/8
+    >\x{ff}<
+ 0: \x{ff}
+
+/[^\xFF]/
+    XYZ
+ 0: X
+
+/[^\xff]/8
+    XYZ
+ 0: X
+    \x{123} 
+ 0: \x{123}
+
+/^[ac]*b/8
+  xb
+No match
+
+/^[ac\x{100}]*b/8
+  xb
+No match
+
+/^[^x]*b/8i
+  xb
+No match
+
+/^[^x]*b/8
+  xb
+No match
+  
+/^\d*b/8
+  xb 
+No match
+
+/(|a)/g8
+    catac
+ 0: 
+ 1: 
+ 0: 
+ 1: 
+ 0: a
+ 1: a
+ 0: 
+ 1: 
+ 0: 
+ 1: 
+ 0: a
+ 1: a
+ 0: 
+ 1: 
+ 0: 
+ 1: 
+    a\x{256}a 
+ 0: 
+ 1: 
+ 0: a
+ 1: a
+ 0: 
+ 1: 
+ 0: 
+ 1: 
+ 0: a
+ 1: a
+ 0: 
+ 1: 
+
+/ End of testinput4 /
diff --git a/external-libs/pcre/testdata/testoutput5 b/external-libs/pcre/testdata/testoutput5
new file mode 100644
index 00000000..1476367e
--- /dev/null
+++ b/external-libs/pcre/testdata/testoutput5
@@ -0,0 +1,1063 @@
+PCRE version 4.5 01-December-2003
+
+/\x{100}/8DM
+Memory allocation (code space): 11
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{100}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 196
+Need char = 128
+
+/\x{1000}/8DM
+Memory allocation (code space): 12
+------------------------------------------------------------------
+  0   8 Bra 0
+  3   3 \x{1000}
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 225
+Need char = 128
+
+/\x{10000}/8DM
+Memory allocation (code space): 13
+------------------------------------------------------------------
+  0   9 Bra 0
+  3   4 \x{10000}
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 240
+Need char = 128
+
+/\x{100000}/8DM
+Memory allocation (code space): 13
+------------------------------------------------------------------
+  0   9 Bra 0
+  3   4 \x{100000}
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 244
+Need char = 128
+
+/\x{1000000}/8DM
+Memory allocation (code space): 14
+------------------------------------------------------------------
+  0  10 Bra 0
+  3   5 \x{1000000}
+ 10  10 Ket
+ 13     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 249
+Need char = 128
+
+/\x{4000000}/8DM
+Memory allocation (code space): 15
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   6 \x{4000000}
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 252
+Need char = 128
+
+/\x{7fffFFFF}/8DM
+Memory allocation (code space): 15
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   6 \x{7fffffff}
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 253
+Need char = 191
+
+/[\x{ff}]/8DM
+Memory allocation (code space): 40
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\xff]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/[\x{100}]/8DM
+Memory allocation (code space): 47
+------------------------------------------------------------------
+  0  11 Bra 0
+  3     [\x{100}]
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/\x{ffffffff}/8
+Failed: character value in \x{...} sequence is too large at offset 11
+
+/\x{100000000}/8
+Failed: character value in \x{...} sequence is too large at offset 12
+
+/^\x{100}a\x{1234}/8
+    \x{100}a\x{1234}bcd
+ 0: \x{100}a\x{1234}
+
+/\x80/8D
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{80}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 194
+Need char = 128
+
+/\xff/8D
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{ff}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 195
+Need char = 191
+
+/\x{0041}\x{2262}\x{0391}\x{002e}/D8
+------------------------------------------------------------------
+  0  12 Bra 0
+  3   7 A\x{2262}\x{391}.
+ 12  12 Ket
+ 15     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 'A'
+Need char = '.'
+    \x{0041}\x{2262}\x{0391}\x{002e}
+ 0: A\x{2262}\x{391}.
+    
+/\x{D55c}\x{ad6d}\x{C5B4}/D8 
+------------------------------------------------------------------
+  0  14 Bra 0
+  3   9 \x{d55c}\x{ad6d}\x{c5b4}
+ 14  14 Ket
+ 17     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 237
+Need char = 180
+    \x{D55c}\x{ad6d}\x{C5B4} 
+ 0: \x{d55c}\x{ad6d}\x{c5b4}
+
+/\x{65e5}\x{672c}\x{8a9e}/D8
+------------------------------------------------------------------
+  0  14 Bra 0
+  3   9 \x{65e5}\x{672c}\x{8a9e}
+ 14  14 Ket
+ 17     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 230
+Need char = 158
+    \x{65e5}\x{672c}\x{8a9e}
+ 0: \x{65e5}\x{672c}\x{8a9e}
+
+/\x{80}/D8
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{80}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 194
+Need char = 128
+
+/\x{084}/D8
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{84}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 194
+Need char = 132
+
+/\x{104}/D8
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{104}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 196
+Need char = 132
+
+/\x{861}/D8
+------------------------------------------------------------------
+  0   8 Bra 0
+  3   3 \x{861}
+  8   8 Ket
+ 11     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 224
+Need char = 161
+
+/\x{212ab}/D8
+------------------------------------------------------------------
+  0   9 Bra 0
+  3   4 \x{212ab}
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 240
+Need char = 171
+
+/.{3,5}X/D8
+------------------------------------------------------------------
+  0  14 Bra 0
+  3     Any{3}
+  7     Any{0,2}
+ 11   1 X
+ 14  14 Ket
+ 17     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+Need char = 'X'
+    \x{212ab}\x{212ab}\x{212ab}\x{861}X
+ 0: \x{212ab}\x{212ab}\x{212ab}\x{861}X
+
+
+/.{3,5}?/D8
+------------------------------------------------------------------
+  0  11 Bra 0
+  3     Any{3}
+  7     Any{0,2}?
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+    \x{212ab}\x{212ab}\x{212ab}\x{861}
+ 0: \x{212ab}\x{212ab}\x{212ab}
+
+/-- These tests are here rather than in testinput4 because Perl 5.6 has --/
+/-- some problems with UTF-8 support, in the area of \x{..} where the   --/
+No match
+/-- value is < 255. It grumbles about invalid UTF-8 strings.            --/
+No match
+
+/^[a\x{c0}]b/8
+    \x{c0}b
+ 0: \x{c0}b
+    
+/^([a\x{c0}]*?)aa/8
+    a\x{c0}aaaa/ 
+ 0: a\x{c0}aa
+ 1: a\x{c0}
+
+/^([a\x{c0}]*?)aa/8
+    a\x{c0}aaaa/ 
+ 0: a\x{c0}aa
+ 1: a\x{c0}
+    a\x{c0}a\x{c0}aaa/ 
+ 0: a\x{c0}a\x{c0}aa
+ 1: a\x{c0}a\x{c0}
+
+/^([a\x{c0}]*)aa/8
+    a\x{c0}aaaa/ 
+ 0: a\x{c0}aaaa
+ 1: a\x{c0}aa
+    a\x{c0}a\x{c0}aaa/ 
+ 0: a\x{c0}a\x{c0}aaa
+ 1: a\x{c0}a\x{c0}a
+
+/^([a\x{c0}]*)a\x{c0}/8
+    a\x{c0}aaaa/ 
+ 0: a\x{c0}
+ 1: 
+    a\x{c0}a\x{c0}aaa/ 
+ 0: a\x{c0}a\x{c0}
+ 1: a\x{c0}
+    
+/-- --/ 
+    
+/(?<=\C)X/8
+Failed: \C not allowed in lookbehind assertion at offset 6
+
+/-- This one is here not because it's different to Perl, but because the --/
+/-- way the captured single-byte is displayed. (In Perl it becomes a --/
+No match
+/-- character, and you can't tell the difference.) --/
+No match
+    
+/X(\C)(.*)/8
+    X\x{1234}
+ 0: X\x{1234}
+ 1: \xe1
+ 2: \x88\xb4
+    X\nabc 
+ 0: X\x{0a}abc
+ 1: \x{0a}
+ 2: abc
+    
+/^[ab]/8D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [a-b]
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored utf8
+No first char
+No need char
+    bar
+ 0: b
+    *** Failers
+No match
+    c
+No match
+    \x{ff}
+No match
+    \x{100}  
+No match
+
+/^[^ab]/8D
+------------------------------------------------------------------
+  0  37 Bra 0
+  3     ^
+  4     [\x00-`c-\xff] (neg)
+ 37  37 Ket
+ 40     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: anchored utf8
+No first char
+No need char
+    c
+ 0: c
+    \x{ff}
+ 0: \x{ff}
+    \x{100}  
+ 0: \x{100}
+    *** Failers 
+ 0: *
+    aaa
+No match
+  
+/[^ab\xC0-\xF0]/8SD
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x00-`c-\xbf\xf1-\xff] (neg)
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+Starting character set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a 
+  \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 
+  \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 
+  5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y 
+  Z [ \ ] ^ _ ` c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f 
+  \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce \xcf \xd0 
+  \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd \xde \xdf 
+  \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec \xed \xee 
+  \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb \xfc \xfd 
+  \xfe \xff 
+    \x{f1}
+ 0: \x{f1}
+    \x{bf}
+ 0: \x{bf}
+    \x{100}
+ 0: \x{100}
+    \x{1000}   
+ 0: \x{1000}
+    *** Failers
+ 0: *
+    \x{c0} 
+No match
+    \x{f0} 
+No match
+
+/Ā{3,4}/8SD
+------------------------------------------------------------------
+  0  13 Bra 0
+  3     \x{100}{3}
+  8     \x{100}{,1}
+ 13  13 Ket
+ 16     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 196
+Need char = 128
+Study returned NULL
+  \x{100}\x{100}\x{100}\x{100\x{100}
+ 0: \x{100}\x{100}\x{100}
+
+/(\x{100}+|x)/8SD
+------------------------------------------------------------------
+  0  18 Bra 0
+  3   6 Bra 1
+  6     \x{100}+
+  9   6 Alt
+ 12   1 x
+ 15  12 Ket
+ 18  18 Ket
+ 21     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+No need char
+Starting character set: x \xc4 
+
+/(\x{100}*a|x)/8SD
+------------------------------------------------------------------
+  0  21 Bra 0
+  3   9 Bra 1
+  6     \x{100}*
+  9   1 a
+ 12   6 Alt
+ 15   1 x
+ 18  15 Ket
+ 21  21 Ket
+ 24     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+No need char
+Starting character set: a x \xc4 
+
+/(\x{100}{0,2}a|x)/8SD
+------------------------------------------------------------------
+  0  23 Bra 0
+  3  11 Bra 1
+  6     \x{100}{,2}
+ 11   1 a
+ 14   6 Alt
+ 17   1 x
+ 20  17 Ket
+ 23  23 Ket
+ 26     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+No need char
+Starting character set: a x \xc4 
+
+/(\x{100}{1,2}a|x)/8SD
+------------------------------------------------------------------
+  0  27 Bra 0
+  3  15 Bra 1
+  6   2 \x{100}
+ 10     \x{100}{,1}
+ 15   1 a
+ 18   6 Alt
+ 21   1 x
+ 24  21 Ket
+ 27  27 Ket
+ 30     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+No need char
+Starting character set: x \xc4 
+
+/\x{100}*(\d+|"(?1)")/8
+    1234
+ 0: 1234
+ 1: 1234
+    "1234" 
+ 0: "1234"
+ 1: "1234"
+    \x{100}1234
+ 0: \x{100}1234
+ 1: 1234
+    "\x{100}1234"  
+ 0: \x{100}1234
+ 1: 1234
+    \x{100}\x{100}12ab 
+ 0: \x{100}\x{100}12
+ 1: 12
+    \x{100}\x{100}"12" 
+ 0: \x{100}\x{100}"12"
+ 1: "12"
+    *** Failers 
+No match
+    \x{100}\x{100}abcd
+No match
+
+/\x{100}/8D
+------------------------------------------------------------------
+  0   7 Bra 0
+  3   2 \x{100}
+  7   7 Ket
+ 10     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 196
+Need char = 128
+
+/\x{100}*/8D
+------------------------------------------------------------------
+  0   6 Bra 0
+  3     \x{100}*
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/a\x{100}*/8D
+------------------------------------------------------------------
+  0   9 Bra 0
+  3   1 a
+  6     \x{100}*
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 'a'
+No need char
+
+/ab\x{100}*/8D
+------------------------------------------------------------------
+  0  10 Bra 0
+  3   2 ab
+  7     \x{100}*
+ 10  10 Ket
+ 13     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 'a'
+Need char = 'b'
+
+/a\x{100}\x{101}*/8D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   3 a\x{100}
+  8     \x{101}*
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 'a'
+Need char = 128
+
+/a\x{100}\x{101}+/8D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   3 a\x{100}
+  8     \x{101}+
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+First char = 'a'
+Need char = 129
+
+/\x{100}*A/8D
+------------------------------------------------------------------
+  0   9 Bra 0
+  3     \x{100}*
+  6   1 A
+  9   9 Ket
+ 12     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+Need char = 'A'
+    A
+ 0: A
+
+/\x{100}*\d(?R)/8D
+------------------------------------------------------------------
+  0  10 Bra 0
+  3     \x{100}*
+  6     \d
+  7   0 Recurse
+ 10  10 Ket
+ 13     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/[^\x{c4}]/D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x01-35-bd-z|~-\xff] (neg)
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[^\x{c4}]/8D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x00-\xc3\xc5-\xff] (neg)
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/[\x{100}]/8DM
+Memory allocation (code space): 47
+------------------------------------------------------------------
+  0  11 Bra 0
+  3     [\x{100}]
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+    \x{100}
+ 0: \x{100}
+    Z\x{100}
+ 0: \x{100}
+    \x{100}Z
+ 0: \x{100}
+    *** Failers 
+No match
+
+/[Z\x{100}]/8DM
+Memory allocation (code space): 47
+------------------------------------------------------------------
+  0  43 Bra 0
+  3     [Z\x{100}]
+ 43  43 Ket
+ 46     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+    Z\x{100}
+ 0: Z
+    \x{100}
+ 0: \x{100}
+    \x{100}Z
+ 0: \x{100}
+    *** Failers 
+No match
+
+/[\x{200}-\x{100}]/8
+Failed: range out of order in character class at offset 15
+
+/[Ā-Ą]/8
+    \x{100}
+ 0: \x{100}
+    \x{104}
+ 0: \x{104}
+    *** Failers
+No match
+    \x{105}
+No match
+    \x{ff}    
+No match
+
+/[z-\x{100}]/8D
+------------------------------------------------------------------
+  0  12 Bra 0
+  3     [z-\x{100}]
+ 12  12 Ket
+ 15     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/[z-\x{100}]/8Di
+------------------------------------------------------------------
+  0  45 Bra 0
+  3     [Zz-\xff\x{100}-\x{100}]
+ 45  45 Ket
+ 48     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: caseless utf8
+No first char
+No need char
+
+/[z\Qa-d]Ā\E]/8D
+------------------------------------------------------------------
+  0  43 Bra 0
+  3     [\-\]adz\x{100}]
+ 43  43 Ket
+ 46     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+    \x{100}
+ 0: \x{100}
+    Ā 
+ 0: \x{100}
+
+/[\xFF]/D
+------------------------------------------------------------------
+  0   6 Bra 0
+  3   1 \xff
+  6   6 Ket
+  9     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+First char = 255
+No need char
+    >\xff<
+ 0: \xff
+
+/[\xff]/D8
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\xff]
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+    >\x{ff}<
+ 0: \x{ff}
+
+/[^\xFF]/D
+------------------------------------------------------------------
+  0   5 Bra 0
+  3     [^\xff]
+  5   5 Ket
+  8     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+No options
+No first char
+No need char
+
+/[^\xff]/8D
+------------------------------------------------------------------
+  0  36 Bra 0
+  3     [\x00-\xfe] (neg)
+ 36  36 Ket
+ 39     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8
+No first char
+No need char
+
+/[Ä-Ü]/8
+    Ö # Matches without Study
+ 0: \x{d6}
+    \x{d6}
+ 0: \x{d6}
+    
+/[Ä-Ü]/8S
+    Ö <-- Same with Study
+ 0: \x{d6}
+    \x{d6}
+ 0: \x{d6}
+    
+/[\x{c4}-\x{dc}]/8 
+    Ö # Matches without Study
+ 0: \x{d6}
+    \x{d6} 
+ 0: \x{d6}
+
+/[\x{c4}-\x{dc}]/8S
+    Ö <-- Same with Study
+ 0: \x{d6}
+    \x{d6} 
+ 0: \x{d6}
+
+/[�]/8
+Failed: invalid UTF-8 string at offset 2
+
+/�/8
+Failed: invalid UTF-8 string at offset 0
+
+/���xxx/8
+Failed: invalid UTF-8 string at offset 1
+
+/���xxx/8?D
+------------------------------------------------------------------
+  0  11 Bra 0
+  3   6 \x{c3}\x{f8}xx
+ 11  11 Ket
+ 14     End
+------------------------------------------------------------------
+Capturing subpattern count = 0
+Options: utf8 no_utf8_check
+First char = 195
+Need char = 'x'
+
+/abc/8
+    �]
+Error -10
+    �
+Error -10
+    ���
+Error -10
+    ���\?
+No match
+
+/anything/8
+    \xc0\x80
+Error -10
+    \xc1\x8f 
+Error -10
+    \xe0\x9f\x80
+Error -10
+    \xf0\x8f\x80\x80 
+Error -10
+    \xf8\x87\x80\x80\x80  
+Error -10
+    \xfc\x83\x80\x80\x80\x80
+Error -10
+    \xfe\x80\x80\x80\x80\x80  
+Error -10
+    \xff\x80\x80\x80\x80\x80  
+Error -10
+    \xc3\x8f
+No match
+    \xe0\xaf\x80
+No match
+    \xe1\x80\x80
+No match
+    \xf0\x9f\x80\x80 
+No match
+    \xf1\x8f\x80\x80 
+No match
+    \xf8\x88\x80\x80\x80  
+No match
+    \xf9\x87\x80\x80\x80  
+No match
+    \xfc\x84\x80\x80\x80\x80
+No match
+    \xfd\x83\x80\x80\x80\x80
+No match
+
+/\x{100}abc(xyz(?1))/8D
+------------------------------------------------------------------
+  0  24 Bra 0
+  3   5 \x{100}abc
+ 10  11 Bra 1
+ 13   3 xyz
+ 18  10 Recurse
+ 21  11 Ket
+ 24  24 Ket
+ 27     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+First char = 196
+Need char = 'z'
+
+/[^\x{100}]abc(xyz(?1))/8D
+------------------------------------------------------------------
+  0  30 Bra 0
+  3     [^\x{100}]
+ 11   3 abc
+ 16  11 Bra 1
+ 19   3 xyz
+ 24  16 Recurse
+ 27  11 Ket
+ 30  30 Ket
+ 33     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+Need char = 'z'
+
+/[ab\x{100}]abc(xyz(?1))/8D
+------------------------------------------------------------------
+  0  62 Bra 0
+  3     [a-b\x{100}]
+ 43   3 abc
+ 48  11 Bra 1
+ 51   3 xyz
+ 56  48 Recurse
+ 59  11 Ket
+ 62  62 Ket
+ 65     End
+------------------------------------------------------------------
+Capturing subpattern count = 1
+Options: utf8
+No first char
+Need char = 'z'
+
+/(\x{100}(b(?2)c))?/D8
+------------------------------------------------------------------
+  0  29 Bra 0
+  3     Brazero
+  4  22 Bra 1
+  7   2 \x{100}
+ 11  12 Bra 2
+ 14   1 b
+ 17  11 Recurse
+ 20   1 c
+ 23  12 Ket
+ 26  22 Ket
+ 29  29 Ket
+ 32     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Options: utf8
+No first char
+No need char
+
+/(\x{100}(b(?2)c)){0,2}/D8
+------------------------------------------------------------------
+  0  61 Bra 0
+  3     Brazero
+  4  54 Bra 0
+  7  22 Bra 1
+ 10   2 \x{100}
+ 14  12 Bra 2
+ 17   1 b
+ 20  14 Recurse
+ 23   1 c
+ 26  12 Ket
+ 29  22 Ket
+ 32     Brazero
+ 33  22 Bra 1
+ 36   2 \x{100}
+ 40  12 Bra 2
+ 43   1 b
+ 46  14 Recurse
+ 49   1 c
+ 52  12 Ket
+ 55  22 Ket
+ 58  54 Ket
+ 61  61 Ket
+ 64     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Options: utf8
+No first char
+No need char
+
+/(\x{100}(b(?1)c))?/D8
+------------------------------------------------------------------
+  0  29 Bra 0
+  3     Brazero
+  4  22 Bra 1
+  7   2 \x{100}
+ 11  12 Bra 2
+ 14   1 b
+ 17   4 Recurse
+ 20   1 c
+ 23  12 Ket
+ 26  22 Ket
+ 29  29 Ket
+ 32     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Options: utf8
+No first char
+No need char
+
+/(\x{100}(b(?1)c)){0,2}/D8
+------------------------------------------------------------------
+  0  61 Bra 0
+  3     Brazero
+  4  54 Bra 0
+  7  22 Bra 1
+ 10   2 \x{100}
+ 14  12 Bra 2
+ 17   1 b
+ 20   7 Recurse
+ 23   1 c
+ 26  12 Ket
+ 29  22 Ket
+ 32     Brazero
+ 33  22 Bra 1
+ 36   2 \x{100}
+ 40  12 Bra 2
+ 43   1 b
+ 46   7 Recurse
+ 49   1 c
+ 52  12 Ket
+ 55  22 Ket
+ 58  54 Ket
+ 61  61 Ket
+ 64     End
+------------------------------------------------------------------
+Capturing subpattern count = 2
+Options: utf8
+No first char
+No need char
+
+/ End of testinput5 /