m_swap.h

The source code of Doom legacy for windows

// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id: m_swap.h,v 1.4 2001/04/17 22:26:07 calumr Exp $
//
// Copyright (C) 1993-1996 by id Software, Inc.
// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
//
// 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: m_swap.h,v $
// Revision 1.4  2001/04/17 22:26:07  calumr
// Initial Mac add
//
// Revision 1.3  2001/02/24 13:35:20  bpereira
// no message
//
// Revision 1.2  2000/02/27 00:42:10  hurdler
// fix CR+LF problem
//
// Revision 1.1.1.1  2000/02/22 20:32:32  hurdler
// Initial import into CVS (v1.29 pr3)
//
//
// DESCRIPTION:
//      Endianess handling, swapping 16bit and 32bit.
//
//-----------------------------------------------------------------------------


#ifndef __M_SWAP__
#define __M_SWAP__


#ifdef __GNUG__
#pragma interface
#endif


// Endianess handling.
// WAD files are stored little endian.
#ifdef __BIG_ENDIAN__

#define SHORT(x) ((short)( \
(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) \
| \
(((unsigned short)(x) & (unsigned short)0xff00U) >> 8) )) \

#define LONG(x) ((int)( \
(((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) \
| \
(((unsigned int)(x) & (unsigned int)0x0000ff00UL) <<  8) \
| \
(((unsigned int)(x) & (unsigned int)0x00ff0000UL) >>  8) \
| \
(((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))

#else
#define SHORT(x)	(x)
#define LONG(x)		(x)
#endif





#endif