1  static const char s[] = "ab.cd.efghijk";
       2  
       3  int
       4  foo (const char *x)
       5  {
       6    const char *a;
       7    int b = 0;
       8  
       9    a = __builtin_strchr (s, '.');
      10    if (a == 0)
      11      b = 1;
      12    else if ((a = __builtin_strchr (a + 1, '.')) == 0)
      13      b = 1;
      14    else if (__builtin_strncmp (s, x, a - s))
      15      b = 1;
      16    else if (__builtin_strncmp (a + 1, x + (a - s + 1), 4) < 0)
      17      b = 1;
      18  
      19    if (b)
      20      return 4;
      21    return 0;
      22  }