A simple and effective glob star matcher.

cosmic.c

int match(const char *needle, const char *haystack) {
  while(*haystack || *needle) {
    if(*needle == '*') {
      if(*(needle + 1) == '\0') {
        return 1;
      } else if(*(needle + 1) == '*') {
        needle += 1;
      } else if(*(needle + 1) == *haystack) {
        needle += 1;
      } else if(*haystack == '\0') {
        needle += 1;
      } else {
        haystack += 1;
      }
    } else if(*needle == *haystack) {
      needle += 1;
      haystack += 1;
    } else {
      return 0;
    }
  }

  return 1;
}

int main(int argc, char **argv) {
  if(argc != 3) {
    return 1;
  }

  return !match(argv[1], argv[2]);
}