linux man page for pcre_copy_substring

PCRE_COPY_SUBSTRING(3)					     Library Functions Manual					    PCRE_COPY_SUBSTRING(3)

NAME
       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       int pcre_copy_substring(const char *subject, int *ovector,
	    int stringcount, int stringnumber, char *buffer,
	    int buffersize);

DESCRIPTION

       This is a convenience function for extracting a captured substring into a given buffer. The arguments are:

	 subject       Subject that has been successfully matched
	 ovector       Offset vector that pcre_exec() used
	 stringcount   Value returned by pcre_exec()
	 stringnumber  Number of the required substring
	 buffer        Buffer to receive the string
	 buffersize    Size of buffer

       The  yield  is the length of the string, PCRE_ERROR_NOMEMORY if the buffer was too small, or PCRE_ERROR_NOSUBSTRING if the string number 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_COPY_SUBSTRING(3)