pcre_get_substring man page
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SYNOPSIS
#include <pcre.h>
int pcre_get_substring(const char *subject, int *ovector,int stringcount, int stringnumber,const char **stringptr);
DESCRIPTION
This is a convenience function for extracting a captured substring. 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
  
stringptr     Where to put the string pointer
The memory in which the substring is placed is obtained by calling
pcre_malloc(). The yield of the function is the length of the substring,
PCRE_ERROR_NOMEMORY if sufficient memory could not be obtained, or
PCRE_ERROR_NOSUBSTRING if the string number is invalid.
There is a complete description of the PCRE native API in the
pcreapi.htmlpcreapi page and a description of the POSIX API in the
pcreposix.htmlpcreposix page.
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