ref: cce6e2644265e45ba140b5a2c5d8cbeccf093874
dir: /src/m_swap.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: m_swap.c 8 2005-07-23 16:44:57Z fraggle $
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// $Log$
// Revision 1.2 2005/07/23 16:44:56 fraggle
// Update copyright to GNU GPL
//
// Revision 1.1.1.1 2005/07/23 16:19:58 fraggle
// Initial import
//
//
// DESCRIPTION:
// Endianess handling, swapping 16bit and 32bit.
//
//-----------------------------------------------------------------------------
static const char
rcsid[] = "$Id: m_swap.c 8 2005-07-23 16:44:57Z fraggle $";
#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