Files
bacnet_stack/bacnet-stack/bigend.c
T

29 lines
795 B
C

/* Big-Endian systems save the most significant byte first. */
/* Sun and Motorola processors, IBM-370s and PDP-10s are big-endian. */
/* "Network Byte Order" is also know as "Big-Endian Byte Order" */
/* for example, a 4 byte integer 67305985 is 0x04030201 in hexidecimal. */
/* x[0] = 0x04 */
/* x[1] = 0x03 */
/* x[2] = 0x02 */
/* x[3] = 0x01 */
/* Little-Endian systems save the least significant byte first. */
/* The entire Intel x86 family, Vaxes, Alphas and PDP-11s are little-endian. */
/* for example, a 4 byte integer 67305985 is 0x04030201 in hexidecimal. */
/* x[0] = 0x01 */
/* x[1] = 0x02 */
/* x[2] = 0x03 */
/* x[3] = 0x04 */
int big_endian(void)
{
union {
long l;
char c[sizeof(long)];
} u;
u.l = 1;
return (u.c[sizeof(long) - 1] == 1);
}