2017-09-16 07:39:38 -04:00
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.TH PCRE2_CONFIG 3 "16 September 2017" "PCRE2 10.31"
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2014-10-21 12:33:30 -04:00
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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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.SM
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.B int pcre2_config(uint32_t \fIwhat\fP, void *\fIwhere\fP);
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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 makes it possible for a client program to find out which optional
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features are available in the version of the PCRE2 library it is using. The
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arguments are as follows:
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.sp
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\fIwhat\fP A code specifying what information is required
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\fIwhere\fP Points to where to put the information
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.sp
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If \fIwhere\fP is NULL, the function returns the amount of memory needed for
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the requested information. When the information is a string, the value is in
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code units; for other types of data it is in bytes.
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.P
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If \fBwhere\fP is not NULL, for PCRE2_CONFIG_JITTARGET,
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PCRE2_CONFIG_UNICODE_VERSION, and PCRE2_CONFIG_VERSION it must point to a
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buffer that is large enough to hold the string. For all other codes it must
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point to a uint32_t integer variable. The available codes are:
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.sp
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PCRE2_CONFIG_BSR Indicates what \eR matches by default:
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PCRE2_BSR_UNICODE
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PCRE2_BSR_ANYCRLF
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PCRE2_CONFIG_COMPILED_WIDTHS Which of 8/16/32 support was compiled
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PCRE2_CONFIG_DEPTHLIMIT Default backtracking depth limit
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PCRE2_CONFIG_HEAPLIMIT Default heap memory limit
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.\" JOIN
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PCRE2_CONFIG_JIT Availability of just-in-time compiler
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support (1=yes 0=no)
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.\" JOIN
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PCRE2_CONFIG_JITTARGET Information (a string) about the target
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architecture for the JIT compiler
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PCRE2_CONFIG_LINKSIZE Configured internal link size (2, 3, 4)
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PCRE2_CONFIG_MATCHLIMIT Default internal resource limit
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PCRE2_CONFIG_NEVER_BACKSLASH_C Whether or not \eC is disabled
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PCRE2_CONFIG_NEWLINE Code for the default newline sequence:
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PCRE2_NEWLINE_CR
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PCRE2_NEWLINE_LF
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PCRE2_NEWLINE_CRLF
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PCRE2_NEWLINE_ANY
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PCRE2_NEWLINE_ANYCRLF
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PCRE2_NEWLINE_NUL
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PCRE2_CONFIG_PARENSLIMIT Default parentheses nesting limit
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PCRE2_CONFIG_RECURSIONLIMIT Obsolete: use PCRE2_CONFIG_DEPTHLIMIT
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PCRE2_CONFIG_STACKRECURSE Obsolete: always returns 0
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.\" JOIN
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PCRE2_CONFIG_UNICODE Availability of Unicode support (1=yes
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0=no)
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PCRE2_CONFIG_UNICODE_VERSION The Unicode version (a string)
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PCRE2_CONFIG_VERSION The PCRE2 version (a string)
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.sp
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The function yields a non-negative value on success or the negative value
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PCRE2_ERROR_BADOPTION otherwise. This is also the result for the
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PCRE2_CONFIG_JITTARGET code if JIT support is not available. When a string is
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requested, the function returns the number of code units used, including the
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terminating 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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