1 <html> 2 <head> 3 <title>pcre2_callout_enumerate specification</title> 4 </head> 5 <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> 6 <h1>pcre2_callout_enumerate man page</h1> 7 <p> 8 Return to the <a href="index.html">PCRE2 index page</a>. 9 </p> 10 <p> 11 This page is part of the PCRE2 HTML documentation. It was generated 12 automatically from the original man page. If there is any nonsense in it, 13 please consult the man page, in case the conversion went wrong. 14 <br> 15 <br><b> 16 SYNOPSIS 17 </b><br> 18 <P> 19 <b>#include <pcre2.h></b> 20 </P> 21 <P> 22 <b>int pcre2_callout_enumerate(const pcre2_code *<i>code</i>,</b> 23 <b> int (*<i>callback</i>)(pcre2_callout_enumerate_block *, void *),</b> 24 <b> void *<i>callout_data</i>);</b> 25 </P> 26 <br><b> 27 DESCRIPTION 28 </b><br> 29 <P> 30 This function scans a compiled regular expression and calls the <i>callback()</i> 31 function for each callout within the pattern. The yield of the function is zero 32 for success and non-zero otherwise. The arguments are: 33 <pre> 34 <i>code</i> Points to the compiled pattern 35 <i>callback</i> The callback function 36 <i>callout_data</i> User data that is passed to the callback 37 </pre> 38 The <i>callback()</i> function is passed a pointer to a data block containing 39 the following fields: 40 <pre> 41 <i>version</i> Block version number 42 <i>pattern_position</i> Offset to next item in pattern 43 <i>next_item_length</i> Length of next item in pattern 44 <i>callout_number</i> Number for numbered callouts 45 <i>callout_string_offset</i> Offset to string within pattern 46 <i>callout_string_length</i> Length of callout string 47 <i>callout_string</i> Points to callout string or is NULL 48 </pre> 49 The second argument is the callout data that was passed to 50 <b>pcre2_callout_enumerate()</b>. The <b>callback()</b> function must return zero 51 for success. Any other value causes the pattern scan to stop, with the value 52 being passed back as the result of <b>pcre2_callout_enumerate()</b>. 53 </P> 54 <P> 55 There is a complete description of the PCRE2 native API in the 56 <a href="pcre2api.html"><b>pcre2api</b></a> 57 page and a description of the POSIX API in the 58 <a href="pcre2posix.html"><b>pcre2posix</b></a> 59 page. 60 <p> 61 Return to the <a href="index.html">PCRE2 index page</a>. 62 </p> 63
