From f3bf8d3110b852b8f338898c3237d16a74360cf3 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt
-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 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 /usr/local, you can compile
-the demonstration program using a command like this:
-
-
-
-
PCRE SAMPLE PROGRAM
-
- 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 systems. You -need to add -
--
- -R/usr/local/lib -- -
-to the compile command to get round this problem. -
-
-Last updated: 28 January 2003
-
-Copyright © 1997-2003 University of Cambridge.
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