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- .TH PCRE2_SET_COMPILE_RECURSION_GUARD 3 "22 October 2014" "PCRE2 10.00"
- .SH NAME
- PCRE2 - Perl-compatible regular expressions (revised API)
- .SH SYNOPSIS
- .rs
- .sp
- .B #include <pcre2.h>
- .PP
- .nf
- .B int pcre2_set_compile_recursion_guard(pcre2_compile_context *\fIccontext\fP,
- .B " int (*\fIguard_function\fP)(uint32_t, void *), void *\fIuser_data\fP);"
- .fi
- .
- .SH DESCRIPTION
- .rs
- .sp
- This function defines, within a compile context, a function that is called
- whenever \fBpcre2_compile()\fP 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 \fBpcre2_set_compile_recursion_guard()\fP is always zero.
- .P
- There is a complete description of the PCRE2 native API in the
- .\" HREF
- \fBpcre2api\fP
- .\"
- page and a description of the POSIX API in the
- .\" HREF
- \fBpcre2posix\fP
- .\"
- page.
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