Linux manual pages Section 3: Subroutines  

Name

PCRE — Perl-compatible regular expressions

Synopsis

#include <pcre.h>
int pcre_get_substring( const char *subject,
  int *ovector,
  int stringcount,
  int stringnumber,
  const char **stringptr);
 
int pcre16_get_substring( PCRE_SPTR16 subject,
  int *ovector,
  int stringcount,
  int stringnumber,
  PCRE_SPTR16 *stringptr);
 
int pcre32_get_substring( PCRE_SPTR32 subject,
  int *ovector,
  int stringcount,
  int stringnumber,
  PCRE_SPTR32 *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[16|32]_exec() used
 stringcount   Value returned by pcre[16|32]_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[16|32]_malloc(). The convenience function pcre[16|32]_free_substring() can be used to free it when it is no longer needed. 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(3) page and a description of the POSIX API in the pcreposix(3) page.

COPYRIGHT

This manual page is taken from the PCRE library, which is distributed under the BSD license.