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  1. #include <sys/types.h>
  2. #include <regex.h>
  3. #include <stdio.h>
  4. #include <string.h>
  5.  
  6.  
  7. void match_all(regex_t *p, char *sz) {
  8.     regmatch_t whole_match;
  9.     int match = 0;
  10.     size_t offset = 0;
  11.     size_t length = strlen(sz);
  12.     char result[BUFSIZ];
  13.     int len;
  14.  
  15.     while (regexec(p, sz + offset, 1, &whole_match, 0) == 0) {
  16.         match = 1;
  17.         len = whole_match.rm_eo - whole_match.rm_so;
  18.         memcpy(result, sz + whole_match.rm_so, len);
  19.         result[len] = 0;
  20.         printf("Match: %s\n", result);
  21.  
  22.         offset += whole_match.rm_eo + 1; // increase the starting offset
  23.         if (offset > length) {
  24.             break;
  25.         }
  26.     }
  27.     if (! match) {
  28.         printf("\"%s\" does not contain a match\n", sz);
  29.     }
  30. }
  31.  
  32.  
  33. int main(int argc, char* argv[]) {
  34.     int r;
  35.     regex_t p;
  36.     r = regcomp(&p, "[[:alnum:]]*k[[:alnum:]]*", 0);
  37.     if (r != 0) {
  38.         printf("regcomp failed\n");
  39.     }
  40.     match_all(&p, "mikko mikko");
  41.     regfree(&p);
  42.     return 0;
  43. }
Success #stdin #stdout 0s 5556KB
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Standard input is empty
stdout
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Match: mikko
Match: mikko
https://ideone.com/kuGsWg
language:
C (gcc 8.3)
created:
3 years ago
visibility:
public

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