PCRE2_CONFIG(3)            Library Functions Manual            PCRE2_CONFIG(3)

       PCRE2 - Perl-compatible regular expressions (revised API)


       #include <pcre2.h>

       int pcre2_config(uint32_t what, void *where);


       This  function makes it possible for a client program to find out which
       optional features are available in the version of the PCRE2 library  it
       is using. The arguments are as follows:

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

       If  where is NULL, the function returns the amount of memory needed for
       the requested information. When the information is a string, the  value
       is in code units; for other types of data it is in bytes.

       If  where  is  not  NULL, for PCRE2_CONFIG_JITTARGET, PCRE2_CONFIG_UNI-
       CODE_VERSION, and PCRE2_CONFIG_VERSION it must point to a  buffer  that
       is  large  enough to hold the string. For all other codes it must point
       to a uint32_t integer variable. The available codes are:

         PCRE2_CONFIG_BSR             Indicates what \R matches by default:
         PCRE2_CONFIG_COMPILED_WIDTHS Which of 8/16/32 support was compiled
         PCRE2_CONFIG_DEPTHLIMIT      Default backtracking depth limit
         PCRE2_CONFIG_HEAPLIMIT       Default heap memory limit
         PCRE2_CONFIG_JIT             Availability of just-in-time compiler
                                       support (1=yes 0=no)
         PCRE2_CONFIG_JITTARGET       Information (a string) about the target
                                        architecture for the JIT compiler
         PCRE2_CONFIG_LINKSIZE        Configured internal link size (2, 3, 4)
         PCRE2_CONFIG_MATCHLIMIT      Default internal resource limit
         PCRE2_CONFIG_NEVER_BACKSLASH_C  Whether or not \C is disabled
         PCRE2_CONFIG_NEWLINE         Code for the default newline sequence:
         PCRE2_CONFIG_PARENSLIMIT     Default parentheses nesting limit
         PCRE2_CONFIG_STACKRECURSE    Obsolete: always returns 0
         PCRE2_CONFIG_UNICODE         Availability of Unicode support (1=yes
         PCRE2_CONFIG_UNICODE_VERSION The Unicode version (a string)
         PCRE2_CONFIG_VERSION         The PCRE2 version (a string)

       The function yields a non-negative value on  success  or  the  negative
       value  PCRE2_ERROR_BADOPTION otherwise. This is also the result for the
       PCRE2_CONFIG_JITTARGET code if JIT support is  not  available.  When  a
       string  is  requested,  the  function  returns the number of code units
       used, including the terminating 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.

PCRE2 10.31                    16 September 2017               PCRE2_CONFIG(3)
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