/*
	q_endian.c
	byte order functions

	$Id: q_endian.c,v 1.4 2007/07/11 16:47:16 sezero Exp $
*/

#include "q_endian.h"
#include <stdlib.h>

#if defined(ASSUMED_LITTLE_ENDIAN)
#warning "Unable to determine CPU endianess. Using LITTLE endian as a default"
#elif defined (ASSUMED_BIG_ENDIAN)
#warning "Unable to determine CPU endianess. Using BIG endian as the default."
#endif

short ShortSwap (short l)
{
	unsigned char	b1, b2;

	b1 = l & 255;
	b2 = (l>>8) & 255;

	return (b1<<8) + b2;
}

int LongSwap (int l)
{
	unsigned char	b1, b2, b3, b4;

	b1 = l & 255;
	b2 = (l>>8 ) & 255;
	b3 = (l>>16) & 255;
	b4 = (l>>24) & 255;

	return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
}

float FloatSwap (float f)
{
	union
	{
		float	f;
		unsigned char	b[4];
	} dat1, dat2;

	dat1.f = f;
	dat2.b[0] = dat1.b[3];
	dat2.b[1] = dat1.b[2];
	dat2.b[2] = dat1.b[1];
	dat2.b[3] = dat1.b[0];
	return dat2.f;
}