gcc/testsuite/consistency.vlad/layout/endian.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 static int w[2];
   5 static char * bytes;
   6
   7 int main(void)
   8 {
   9   printf ("+++Endian test:\n");
  10   if (sizeof (int) == 2)
  11     {
  12       w[0] = 0x4142;
  13       w[1] = 0;
  14       bytes = (char *) w;
  15       if (strcmp(bytes, "AB") == 0)
  16         printf ("big endian\n");
  17       else if (strcmp(bytes, "BA") == 0)
  18         printf ("little endian\n");
  19       else
  20         {
  21           printf ("nor big nor little endian\n");
  22           return 1;
  23         }
  24     }
  25   else if (sizeof (int) == 4)
  26     {
  27       w[0] = 0x41424344;
  28       w[1] = 0;
  29       bytes = (char *) w;
  30       if (strcmp(bytes, "ABCD") == 0)
  31         printf ("big endian\n");
  32       else if (strcmp(bytes, "DCBA") == 0)
  33         printf ("little endian\n");
  34       else
  35         {
  36           printf ("nor big nor little endian\n");
  37           return 1;
  38         }
  39     }
  40   else
  41     {
  42       printf ("unexpected size of int\n");
  43       return 1;
  44     }
  45   return 0;
  46 }