PCRE - Perl-compatible regular expressions
#include <pcre.h>
int
pcre_get_named_substring(const pcre *code,
const char *subject, int
*ovector,
int stringcount, const char
*stringname,
const char **stringptr);
int
pcre16_get_named_substring(const pcre16 *code,
PCRE_SPTR16 subject, int
*ovector,
int stringcount, PCRE_SPTR16
stringname,
PCRE_SPTR16 *stringptr);
int
pcre32_get_named_substring(const pcre32 *code,
PCRE_SPTR32 subject, int
*ovector,
int stringcount, PCRE_SPTR32
stringname,
PCRE_SPTR32 *stringptr);
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[16|32]_exec()
used
stringcount Value returned by pcre[16|32]_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[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 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.