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| <h3 class="section">10.3 Regular Expression Matching</h3> |
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| <p>The GNU C library supports two interfaces for matching regular |
| expressions. One is the standard POSIX.2 interface, and the other is |
| what the GNU system has had for many years. |
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| <p>Both interfaces are declared in the header file <samp><span class="file">regex.h</span></samp>. |
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| <ul class="menu"> |
| <li><a accesskey="1" href="POSIX-Regexp-Compilation.html#POSIX-Regexp-Compilation">POSIX Regexp Compilation</a>: Using <code>regcomp</code> to prepare to match. |
| <li><a accesskey="2" href="Flags-for-POSIX-Regexps.html#Flags-for-POSIX-Regexps">Flags for POSIX Regexps</a>: Syntax variations for <code>regcomp</code>. |
| <li><a accesskey="3" href="Matching-POSIX-Regexps.html#Matching-POSIX-Regexps">Matching POSIX Regexps</a>: Using <code>regexec</code> to match the compiled |
| pattern that you get from <code>regcomp</code>. |
| <li><a accesskey="4" href="Regexp-Subexpressions.html#Regexp-Subexpressions">Regexp Subexpressions</a>: Finding which parts of the string were matched. |
| <li><a accesskey="5" href="Subexpression-Complications.html#Subexpression-Complications">Subexpression Complications</a>: Find points of which parts were matched. |
| <li><a accesskey="6" href="Regexp-Cleanup.html#Regexp-Cleanup">Regexp Cleanup</a>: Freeing storage; reporting errors. |
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