Linux manual pages Section 3: Subroutines  

Name

PCRE — Perl-compatible regular expressions

Synopsis

#include <pcre.h>
int pcre_config( int what,
  void *where);
 
int pcre16_config( int what,
  void *where);
 
int pcre32_config( int what,
  void *where);
 

DESCRIPTION

This function makes it possible for a client program to find out which optional features are available in the version of the PCRE library it is using. The arguments are as follows:

 what     A code specifying what information is required
 where    Points to where to put the data

The where argument must point to an integer variable, except for PCRE_CONFIG_MATCH_LIMIT and PCRE_CONFIG_MATCH_LIMIT_RECURSION, when it must point to an unsigned long integer. The available codes are:

 PCRE_CONFIG_JIT           Availability of just-in-time compiler
                             support (1=yes 0=no)
 PCRE_CONFIG_JITTARGET     String containing information about the
                             target architecture for the JIT compiler,
                             or NULL if there is no JIT support
 PCRE_CONFIG_LINK_SIZE     Internal link size: 2, 3, or 4
 PCRE_CONFIG_MATCH_LIMIT   Internal resource limit
 PCRE_CONFIG_MATCH_LIMIT_RECURSION
                           Internal recursion depth limit
 PCRE_CONFIG_NEWLINE       Value of the default newline sequence:
                               13 (0x000d)    for CR
                               10 (0x000a)    for LF
                             3338 (0x0d0a)    for CRLF
                               -2             for ANYCRLF
                               -1             for ANY
 PCRE_CONFIG_BSR           Indicates what \R matches by default:
                                0             all Unicode line endings
                                1             CR, LF, or CRLF only
 PCRE_CONFIG_POSIX_MALLOC_THRESHOLD
                           Threshold of return slots, above which
                             malloc() is used by the POSIX API
 PCRE_CONFIG_STACKRECURSE  Recursion implementation (1=stack 0=heap)
 PCRE_CONFIG_UTF16         Availability of UTF-16 support (1=yes
                              0=no); option for pcre16_config()
 PCRE_CONFIG_UTF32         Availability of UTF-32 support (1=yes
                              0=no); option for pcre32_config()
 PCRE_CONFIG_UTF8          Availability of UTF-8 support (1=yes 0=no);
                             option for pcre_config()
 PCRE_CONFIG_UNICODE_PROPERTIES
                           Availability of Unicode property support
                             (1=yes 0=no)

The function yields 0 on success or PCRE_ERROR_BADOPTION otherwise. That error is also given if PCRE_CONFIG_UTF16 or PCRE_CONFIG_UTF32 is passed to pcre_config(), if PCRE_CONFIG_UTF8 or PCRE_CONFIG_UTF32 is passed to pcre16_config(), or if PCRE_CONFIG_UTF8 or PCRE_CONFIG_UTF16 is passed to pcre32_config().

There is a complete description of the PCRE native API in the pcreapi(3) page and a description of the POSIX API in the pcreposix(3) page.

COPYRIGHT

This manual page is taken from the PCRE library, which is distributed under the BSD license.