source: trunk/third/xntp/util/byteorder.c @ 10832

/*
 * This works on:
 *   Crays
 *   Conven
 *   sparc's
 *   Dec mip machines
 *   Dec alpha machines
 *   RS6000
 *   SGI's
 */

#include <stdio.h>
main()
{
    int i;
    int big;
    union {
        unsigned long l;
        char c[sizeof(long)];
    } u;

#if defined(LONG8)
    u.l = (((long)0x08070605) << 32) | (long)0x04030201;
#else
    u.l = 0x04030201;
#endif
    if (sizeof(long) > 4) {
        if (u.c[0] == 0x08) big = 1;
        else                big = 0;
    } else {
        if (u.c[0] == 0x04) big = 1;
        else                big = 0;
    }
    for (i=0; i< sizeof(long); i++) {
        if (big == 1 && (u.c[i] == (sizeof(long) - i))) { 
                continue; 
        } else if (big == 0 && (u.c[i] == (i+1))) {
                continue;
        } else {
             big = -1;
             break;
        }
    }

    if (big == 1) {
        printf("XNTP_BIG_ENDIAN\n");
    } else if (big == 0) {
        printf("XNTP_LITTLE_ENDIAN\n");
    }
  exit(0);
}