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<html><head><title>pcre2_match_data_create_from_pattern specification</title></head><body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"><h1>pcre2_match_data_create_from_pattern man page</h1><p>Return to the <a href="index.html">PCRE2 index page</a>.</p><p>This page is part of the PCRE2 HTML documentation. It was generatedautomatically from the original man page. If there is any nonsense in it,please consult the man page, in case the conversion went wrong.<br><br><b>SYNOPSIS</b><br><P><b>#include <pcre2.h></b></P><P><b>pcre2_match_data *pcre2_match_data_create_from_pattern(</b><b> const pcre2_code *<i>code</i>, pcre2_general_context *<i>gcontext</i>);</b></P><br><b>DESCRIPTION</b><br><P>This function creates a new match data block for holding the result of a match.The first argument points to a compiled pattern. The number of capturingparentheses within the pattern is used to compute the number of pairs ofoffsets that are required in the match data block. These form the "outputvector" (ovector) within the match data block, and are used to identify thematched string and any captured substrings when matching with<b>pcre2_match()</b>. If you are using <b>pcre2_dfa_match()</b>, which uses theoutput vector in a different way, you should use <b>pcre2_match_data_create()</b>instead of this function.</P><P>The second argument points to a general context, for custom memory management,or is NULL to use the same memory allocator as was used for the compiledpattern. The result of the function is NULL if the memory for the block couldnot be obtained.</P><P>There is a complete description of the PCRE2 native API in the<a href="pcre2api.html"><b>pcre2api</b></a>page and a description of the POSIX API in the<a href="pcre2posix.html"><b>pcre2posix</b></a>page.<p>Return to the <a href="index.html">PCRE2 index page</a>.</p>
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