1. #define _GNU_SOURCE
2.  
3. #include <regex.h>
4. #include <stdio.h>
5. #include <string.h>
6.  
7. // http://stackoverflow.com/questions/2359811/working-with-gnu-regex-functions-in-c-or-c
8.  
9. int main() {
10.    int i;
11.    char pat_str[] = "\\(.*\\)\\(FS#[0-9]+\\)\\(.*\\)";
12.    //char pat_str[] = ".*FS#[0-9]+.*";
13.    struct re_pattern_buffer pat_buff;
14.    struct re_registers regs;
15.    pat_buff.translate = 0;
16.    pat_buff.fastmap = 0;
17.    pat_buff.buffer = 0;
18.    pat_buff.allocated = 0;
19.    //pat_buff.syntax = _RE_SYNTAX_POSIX_COMMON;
20.    re_syntax_options = _RE_SYNTAX_POSIX_COMMON;
21.  
22.    re_compile_pattern(pat_str, sizeof(pat_str) - 1, &pat_buff);
23.    char* strings[] = {"Partially implements FS#6: Conference ID changed to c+bugs@conference.thedevstack.de", "abc\nblubb FS#123 abc", "FS#123 abcdef", "abcdef FS#123", "blubber"};
24.  
25.    for (i = 0; i < sizeof(strings)/sizeof(char*); i++) {
26.       int match_ret = re_match(&pat_buff, strings[i], strlen(strings[i]), 0, &regs);
27.       if (match_ret >= 0) {
28.          printf("juhu %d\n", regs.num_regs);
29.          int j;
30.          // first is all, last is -1,-1
31.          for (j = 1; j < regs.num_regs - 1; j++) {
32.             int s = regs.start[j];
33.             int e = regs.end[j];
34.             printf("%d: %d -> %d \"%.*s\"\n", j, s, e, e - s, strings[i] + s);
35.          }
36.       } else if (match_ret == -1) {
37.          printf("ohno\n");
38.       } else {
39.          printf("error\n");
40.       }
41.    }
42.  
43.    regfree(&pat_buff);
44. }
45.