pcre match all groups in C - c

Question

I want to match a group recursively using PCRE C library.
e.g.
pattern = "(\d,)"
subject = "5,6,3,2,"
OVECCOUNT = 30
pcrePtr = pcre_compile(pattern, 0, &error, &erroffset, NULL);
rc = pcre_exec(pcrePtr, NULL, subject, (int)strlen(subject),
0, 0, ovector, OVECCOUNT);
rc is -1..
How to match all groups so that matches are "5,", "6,", "3,", "2,"
For analogy, PHP's preg_match_all parses entire string until the end of subject...

Answer 1

Any way I used strtok since "," was repeating after each group..
Solution using pcre is welcomed....

Answer 2

Try this :
pcre *myregexp;
const char *error;
int erroroffset;
int offsetcount;
int offsets[(0+1)*3]; // (max_capturing_groups+1)*3
myregexp = pcre_compile("\\d,", 0, &error, &erroroffset, NULL);
if (myregexp != NULL) {
offsetcount = pcre_exec(myregexp, NULL, subject, strlen(subject), 0, 0, offsets, (0+1)*3);
while (offsetcount > 0) {
// match offset = offsets[0];
// match length = offsets[1] - offsets[0];
if (pcre_get_substring(subject, &offsets, offsetcount, 0, &result) >= 0) {
// Do something with match we just stored into result
}
offsetcount = pcre_exec(myregexp, NULL, subject, strlen(subject), 0, offsets[1], offsets, (0+1)*3);
}
} else {
// Syntax error in the regular expression at erroroffset
}
I believe the comments are self explanatory?