Files
bacnet_stack/bacnet-stack/bigend.c
T
2004-11-16 19:46:29 +00:00

28 lines
686 B
C

// Big-Endian systems save the most significant byte first.
// Sun and Motorola processors, IBM-370s and PDP-10s are big-endian.
// 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);
}