pcre2_config


       #include <pcre2.h>

       int pcre2_config(uint32_t 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 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_BSR_UNICODE
                                        PCRE2_BSR_ANYCRLF
         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_NEWLINE_CR
                                        PCRE2_NEWLINE_LF
                                        PCRE2_NEWLINE_CRLF
                                        PCRE2_NEWLINE_ANY
                                        PCRE2_NEWLINE_ANYCRLF
                                        PCRE2_NEWLINE_NUL
         PCRE2_CONFIG_PARENSLIMIT     Default parentheses nesting limit
         PCRE2_CONFIG_RECURSIONLIMIT  Obsolete: use PCRE2_CONFIG_DEPTHLIMIT
         PCRE2_CONFIG_STACKRECURSE    Obsolete: always returns 0
         PCRE2_CONFIG_UNICODE         Availability of Unicode support (1=yes
                                        0=no)
         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
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