Determine whether the byte ordering is big endian or little endian

아. 왜 이렇게 간단한 걸 진작에 생각 못했지.

const static short s_sh = 0x00ff;

const static char *s_pch = (char*)&s_sh;

#define IsOrderingBigEndian (s_pch[0]==0?TRUE:FALSE)

Simpler: 

const static short s_sh = 0x0100;

const static char *s_pch = (char*)&s_sh;

#define IsOrderingBigEndian (s_pch[0])