gcc/testsuite/gcc.c-torture/execute/20121108-1.c

   1 char temp[] = "192.168.190.160";
   2 unsigned result = (((((192u<<8)|168u)<<8)|190u)<<8)|160u;
   3
   4 int strtoul1(const char *a, char **b, int c) __attribute__((noinline, noclone));
   5 int strtoul1(const char *a, char **b, int c)
   6 {
   7   *b = a+3;
   8   if (a == temp)
   9     return 192;
  10   else if (a == temp+4)
  11     return 168;
  12   else if (a == temp+8)
  13     return 190;
  14   else if (a == temp+12)
  15     return 160;
  16   __builtin_abort();
  17 }
  18
  19 int string_to_ip(const char *s) __attribute__((noinline,noclone));
  20 int string_to_ip(const char *s)
  21 {
  22         int addr;
  23         char *e;
  24         int i;
  25
  26         if (s == 0)
  27                 return(0);
  28
  29         for (addr=0, i=0; i<4; ++i) {
  30                 int val = s ? strtoul1(s, &e, 10) : 0;
  31                 addr <<= 8;
  32                 addr |= (val & 0xFF);
  33                 if (s) {
  34                         s = (*e) ? e+1 : e;
  35                 }
  36         }
  37
  38         return addr;
  39 }
  40
  41 int main(void)
  42 {
  43   int t = string_to_ip (temp);
  44   printf ("%x\n", t);
  45   printf ("%x\n", result);
  46   if (t != result)
  47     __builtin_abort ();
  48   printf ("WORKS.\n");
  49   return 0;
  50 }
  51