PCRE2_SET_COMPILE_RECURSION_GUARD(3) Introduction to Library Functions

NAME

PCRE2 - Perl-compatible regular expressions (revised API)

SYNOPSIS

#include <pcre2.h>

int pcre2_set_compile_recursion_guard(pcre2_compile_context *ccontext,
int (*guard_function)(uint32_t, void *), void *user_data);

DESCRIPTION

This function defines, within a compile context, a function that is
called whenever pcre2_compile() starts to compile a parenthesized
part of a pattern. The first argument to the function gives the
current depth of parenthesis nesting, and the second is user data
that is supplied when the function is set up. The callout function
should return zero if all is well, or non-zero to force an error.
This feature is provided so that applications can check the available
system stack space, in order to avoid running out. The result of
pcre2_set_compile_recursion_guard() is always zero.

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 10.45 26 November 2014
PCRE2_SET_COMPILE_RECURSION_GUARD(3)