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64 lines
2.4 KiB
HTML
64 lines
2.4 KiB
HTML
<html>
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<head>
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<title>pcre2_callout_enumerate 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_callout_enumerate 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_callout_enumerate(const pcre2_code *<i>code</i>,</b>
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<b> int (*<i>callback</i>)(pcre2_callout_enumerate_block *, void *),</b>
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<b> void *<i>callout_data</i>);</b>
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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 scans a compiled regular expression and calls the <i>callback()</i>
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function for each callout within the pattern. The yield of the function is zero
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for success and non-zero otherwise. The arguments are:
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<pre>
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<i>code</i> Points to the compiled pattern
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<i>callback</i> The callback function
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<i>callout_data</i> User data that is passed to the callback
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</pre>
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The <i>callback()</i> function is passed a pointer to a data block containing
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the following fields (not necessarily in this order):
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<pre>
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uint32_t <i>version</i> Block version number
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uint32_t <i>callout_number</i> Number for numbered callouts
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PCRE2_SIZE <i>pattern_position</i> Offset to next item in pattern
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PCRE2_SIZE <i>next_item_length</i> Length of next item in pattern
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PCRE2_SIZE <i>callout_string_offset</i> Offset to string within pattern
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PCRE2_SIZE <i>callout_string_length</i> Length of callout string
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PCRE2_SPTR <i>callout_string</i> Points to callout string or is NULL
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</pre>
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The second argument passed to the <b>callback()</b> function is the callout data
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that was passed to <b>pcre2_callout_enumerate()</b>. The <b>callback()</b>
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function must return zero for success. Any other value causes the pattern scan
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to stop, with the value being passed back as the result of
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<b>pcre2_callout_enumerate()</b>.
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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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