utils/buildendian.c

   1 #include <stdio.h>
   2 #include <stdint.h>
   3
   4 int main(void)
   5 {
   6         union {
   7                 uint32_t a;
   8                 uint8_t b[4];
   9         } u;
  10
  11         u.a = 0x12345678;
  12
  13         if (u.b[0] == 0x12 && u.b[1] == 0x34 && u.b[2] == 0x56 && u.b[3] == 0x78)
  14                 printf("BE");
  15         else if (u.b[3] == 0x12 && u.b[2] == 0x34 &&
  16                  u.b[1] == 0x56 && u.b[0] == 0x78)
  17                 printf("LE");
  18         else
  19                 printf("UNKNOWN");
  20
  21         return 0;
  22 }