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Man Pages


Manual Reference Pages  -  PCRE2_CALLOUT_ENUMERATE (3)

NAME

PCRE2 - Perl-compatible regular expressions (revised API)

CONTENTS

Synopsis
Description

SYNOPSIS

#include <pcre2.h>


int pcre2_callout_enumerate(const pcre2_code *code, 

  int (*callback)(pcre2_callout_enumerate_block *, void *), 

  void *callout_data); 

DESCRIPTION

This function scans a compiled regular expression and calls the callback() function for each callout within the pattern. The yield of the function is zero for success and non-zero otherwise. The arguments are:

code Points to the compiled pattern
callback The callback function
callout_data User data that is passed to the callback

The callback() function is passed a pointer to a data block containing the following fields:

version Block version number
pattern_position Offset to next item in pattern
next_item_length Length of next item in pattern
callout_number Number for numbered callouts
callout_string_offset Offset to string within pattern
callout_string_length Length of callout string
callout_string Points to callout string or is NULL

The second argument is the callout data that was passed to pcre2_callout_enumerate(). The callback() function must return zero for success. Any other value causes the pattern scan to stop, with the value being passed back as the result of pcre2_callout_enumerate().

There is a complete description of the PCRE2 native API in the pcre2api page and a description of the POSIX API in the pcre2posix page.

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PCRE2 10.20 PCRE2_COMPILE (3) 23 March 2015

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