linux man page for pcre_get_named_substring

PCRE_GET_NAMED_SUBSTRING(3)				     Library Functions Manual				       PCRE_GET_NAMED_SUBSTRING(3)

NAME
       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       int pcre_get_named_substring(const pcre *code,
	    const char *subject, int *ovector,
	    int stringcount, const char *stringname,
	    const char **stringptr);

DESCRIPTION

       This is a convenience function for extracting a captured substring by name. The arguments are:

	 code	       Compiled pattern
	 subject       Subject that has been successfully matched
	 ovector       Offset vector that pcre_exec() used
	 stringcount   Value returned by pcre_exec()
	 stringname    Name of the required substring
	 stringptr     Where to put the string pointer

       The  memory  in	which  the substring is placed is obtained by calling pcre_malloc(). The convenience function pcre_free_substring() can be
       used to free it when it is no longer needed. The yield of the function is the length of the  extracted  substring,  PCRE_ERROR_NOMEMORY	if
       sufficient memory could not be obtained, or PCRE_ERROR_NOSUBSTRING if the string name is invalid.

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

														       PCRE_GET_NAMED_SUBSTRING(3)