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35 lines
1.1 KiB
Groff
35 lines
1.1 KiB
Groff
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.TH PCRE2_SET_COMPILE_RECURSION_GUARD 3 "22 October 2014" "PCRE2 10.00"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH SYNOPSIS
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.rs
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.sp
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.B #include <pcre2.h>
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.PP
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.nf
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.B int pcre2_set_compile_recursion_guard(pcre2_compile_context *\fIccontext\fP,
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.B " int (*\fIguard_function\fP)(uint32_t, void *), void *\fIuser_data\fP);"
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.fi
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.
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.SH DESCRIPTION
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.rs
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.sp
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This function defines, within a compile context, a function that is called
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whenever \fBpcre2_compile()\fP starts to compile a parenthesized part of a
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pattern. The first argument to the function gives the current depth of
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parenthesis nesting, and the second is user data that is supplied when the
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function is set up. The callout function should return zero if all is well, or
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non-zero to force an error. This feature is provided so that applications can
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check the available system stack space, in order to avoid running out. The
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result of \fBpcre2_set_compile_recursion_guard()\fP is always zero.
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.P
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There is a complete description of the PCRE2 native API in the
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.\" HREF
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\fBpcre2api\fP
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.\"
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page and a description of the POSIX API in the
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.\" HREF
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\fBpcre2posix\fP
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.\"
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page.
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