oracular (3) pcre2_set_compile_recursion_guard.3.gz

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.