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copied!<p>You can use <a href="http://www.pcre.org/" rel="nofollow noreferrer">PCRE</a>:</p> <blockquote> <p>The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular expression API. The PCRE library is free, even for building commercial software.</p> </blockquote> <p>See <a href="http://www.pcre.org/original/doc/html/pcredemo.html" rel="nofollow noreferrer">pcredemo.c</a> for a PCRE example.</p> <p>If you cannot use PCRE, <a href="http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html" rel="nofollow noreferrer">POSIX regular expression</a> support is probably available on your system (<a href="https://stackoverflow.com/questions/1631450/how-can-use-regular-expressions-in-c/1631569#1631569">as @tinkertim pointed out</a>). For Windows, you can use the <a href="http://gnuwin32.sourceforge.net/packages/regex.htm" rel="nofollow noreferrer">gnuwin Regex for Windows package</a>.</p> <p>The <a href="http://www.opengroup.org/onlinepubs/009695399/functions/regcomp.html" rel="nofollow noreferrer"><code>regcomp</code></a> documentation includes the following example:</p> <pre><code>#include <regex.h> /* * Match string against the extended regular expression in * pattern, treating errors as no match. * * Return 1 for match, 0 for no match. */ int match(const char *string, char *pattern) { int status; regex_t re; if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB) != 0) { return(0); /* Report error. */ } status = regexec(&re, string, (size_t) 0, NULL, 0); regfree(&re); if (status != 0) { return(0); /* Report error. */ } return(1); } </code></pre>

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