From 0a55fa14f462169bbd8a8de623804f039854f95f Mon Sep 17 00:00:00 2001
From: dartraiden
-Return to the PCRE index page.
-
-This page is part of the PCRE HTML documentation. It was 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.
-
-A simple, complete demonstration program, to get you started with using PCRE,
-is supplied in the file pcredemo.c in the PCRE distribution. A listing of
-this program is given in the
-pcredemo
-documentation. If you do not have a copy of the PCRE distribution, you can save
-this listing to re-create pcredemo.c.
-
-The demonstration program, which uses the original PCRE 8-bit library, 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.
-
-If PCRE is installed in the standard include and library directories for your
-operating system, you should be able to compile the demonstration program using
-this command:
-pcresample man page
-
-
-PCRE SAMPLE PROGRAM
-
-
- gcc -o pcredemo pcredemo.c -lpcre
-
-If PCRE is installed elsewhere, you may need to add additional options to the
-command line. For example, on a Unix-like system that has PCRE installed in
-/usr/local, you can compile the demonstration program using a command
-like this:
-
- gcc -o pcredemo -I/usr/local/include pcredemo.c -L/usr/local/lib -lpcre
-
-In a Windows environment, if you want to statically link the program against a
-non-dll pcre.a file, you must uncomment the line that defines PCRE_STATIC
-before including pcre.h, because otherwise the pcre_malloc() and
-pcre_free() exported functions will be declared
-__declspec(dllimport), with unwanted results.
-
-Once you have compiled and linked the demonstration program, 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 both -PCRE libraries. The -pcredemo -program is provided as a simple coding example. - -
-If you try to run -pcredemo -when PCRE is not installed in the standard library directory, you may get an -error like this on some operating systems (e.g. Solaris): -
- 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 --(for example) to the compile command to get round this problem. - -
-Philip Hazel
-
-University Computing Service
-
-Cambridge CB2 3QH, England.
-
-
-Last updated: 10 January 2012
-
-Copyright © 1997-2012 University of Cambridge.
-
-
-Return to the PCRE index page. -
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