Source to src/m_swap.c
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// $Log:$
//
// DESCRIPTION:
// Endianess handling, swapping 16bit and 32bit.
//
//-----------------------------------------------------------------------------
static const char
rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $";
#ifdef __GNUG__
#pragma implementation "m_swap.h"
#endif
#include "m_swap.h"
// Not needed with big endian.
#ifndef __BIG_ENDIAN__
// Swap 16bit, that is, MSB and LSB byte.
unsigned short SwapSHORT(unsigned short x)
{
// No masking with 0xFF should be necessary.
return (x>>8) | (x<<8);
}
// Swapping 32bit.
unsigned long SwapLONG( unsigned long x)
{
return
(x>>24)
| ((x>>8) & 0xff00)
| ((x<<8) & 0xff0000)
| (x<<24);
}
#endif