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<title>pcre2_substring_get_bynumber specification</title>
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<h1>pcre2_substring_get_bynumber man page</h1>
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<br><b>
SYNOPSIS
</b><br>
<P>
<b>#include <pcre2.h></b>
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<P>
<b>int pcre2_substring_get_bynumber(pcre2_match_data *<i>match_data</i>,</b>
<b> uint32_t <i>number</i>, PCRE2_UCHAR **<i>bufferptr</i>, PCRE2_SIZE *<i>bufflen</i>);</b>
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<br><b>
DESCRIPTION
</b><br>
<P>
This is a convenience function for extracting a captured substring by number
into newly acquired memory. The arguments are:
<pre>
<i>match_data</i> The match data for the match
<i>number</i> Number of the required substring
<i>bufferptr</i> Where to put the string pointer
<i>bufflen</i> Where to put the string length
</pre>
The memory in which the substring is placed is obtained by calling the same
memory allocation function that was used for the match data block. The
convenience function <b>pcre2_substring_free()</b> can be used to free it when
it is no longer needed. The yield of the function is zero for success or one of
the following error numbers:
<pre>
PCRE2_ERROR_NOSUBSTRING there are no groups of that number
PCRE2_ERROR_UNAVAILBLE the ovector was too small for that group
PCRE2_ERROR_UNSET the group did not participate in the match
PCRE2_ERROR_NOMEMORY memory could not be obtained
</PRE>
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<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.
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