判断big-endian

来源：libao-0.8.6:audio_out.c

typedef unsigned short uint_16;
/* Stolen from Vorbis' lib/vorbisfile.c */
int ao_is_big_endian(void)
{
 uint_16 pattern = 0xbabe;
 unsigned char *bytewise = (unsigned char *)&pattern;

 if (bytewise[0] == 0xba) return 1;
 return 0;
}