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Diffstat (limited to 'external-libs/pcre/internal.h')
| -rw-r--r-- | external-libs/pcre/internal.h | 677 |
1 files changed, 677 insertions, 0 deletions
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 */ |