PCRE2_COMPILE(3)PCRE2_COMPILE(3)NAME
PCRE2 - Perl-compatible regular expressions (revised API)
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 call‐
back() 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_call‐
out_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.
PCRE2 10.20 23 March 2015 PCRE2_COMPILE(3)
