PCRE - Perl-compatible regular expressions .rs #include <pcre.h>

 int pcre_get_substring_list(const char *subject,  " int *ovector, int stringcount, const char ***listptr);"  int pcre16_get_substring_list(PCRE_SPTR16 subject,  " int *ovector, int stringcount, PCRE_SPTR16 **listptr);"  int pcre32_get_substring_list(PCRE_SPTR32 subject,  " int *ovector, int stringcount, PCRE_SPTR32 **listptr);" 

. .rs This is a convenience function for extracting a list of all the captured substrings. 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 listptr Where to put a pointer to the list The memory in which the substrings and the list are placed is obtained by calling pcre[16|32]_malloc(). The convenience function pcre[16|32]_free_substring_list() can be used to free it when it is no longer needed. A pointer to a list of pointers is put in the variable whose address is in listptr. The list is terminated by a NULL pointer. The yield of the function is zero on success or PCRE_ERROR_NOMEMORY if sufficient memory could not be obtained.

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