2014-10-25 10:16:46 -04:00
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<title>pcre2_set_compile_recursion_guard specification</title>
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</head>
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<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
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<h1>pcre2_set_compile_recursion_guard man page</h1>
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<p>
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Return to the <a href="index.html">PCRE2 index page</a>.
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</p>
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<p>
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This page is part of the PCRE2 HTML documentation. It was generated
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automatically from the original man page. If there is any nonsense in it,
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please consult the man page, in case the conversion went wrong.
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<br>
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<br><b>
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SYNOPSIS
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</b><br>
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<P>
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<b>#include <pcre2.h></b>
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</P>
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<P>
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<b>int pcre2_set_compile_recursion_guard(pcre2_compile_context *<i>ccontext</i>,</b>
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2014-11-26 11:51:53 -05:00
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<b> int (*<i>guard_function</i>)(uint32_t, void *), void *<i>user_data</i>);</b>
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2014-10-25 10:16:46 -04:00
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</P>
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<br><b>
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DESCRIPTION
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</b><br>
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<P>
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This function defines, within a compile context, a function that is called
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whenever <b>pcre2_compile()</b> starts to compile a parenthesized part of a
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pattern. The first argument to the function gives the current depth of
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parenthesis nesting, and the second is user data that is supplied when the
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function is set up. The callout function should return zero if all is well, or
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non-zero to force an error. This feature is provided so that applications can
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check the available system stack space, in order to avoid running out. The
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result of <b>pcre2_set_compile_recursion_guard()</b> is always zero.
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2014-10-25 10:16:46 -04:00
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</P>
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<P>
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There is a complete description of the PCRE2 native API in the
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<a href="pcre2api.html"><b>pcre2api</b></a>
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page and a description of the POSIX API in the
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<a href="pcre2posix.html"><b>pcre2posix</b></a>
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page.
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<p>
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Return to the <a href="index.html">PCRE2 index page</a>.
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</p>
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