47f4a458d6
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9312 a1c6a512-1295-4272-9138-f99709370657
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/* Emacs style mode select -*- C++ -*-
|
|
*-----------------------------------------------------------------------------
|
|
*
|
|
*
|
|
* PrBoom a Doom port merged with LxDoom and LSDLDoom
|
|
* based on BOOM, a modified and improved DOOM engine
|
|
* Copyright (C) 1999 by
|
|
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
|
|
* Copyright (C) 1999-2000 by
|
|
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
|
|
*
|
|
* 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.
|
|
*
|
|
* DESCRIPTION:
|
|
* Endianess handling, swapping 16bit and 32bit.
|
|
*
|
|
*-----------------------------------------------------------------------------*/
|
|
|
|
|
|
#ifndef __M_SWAP__
|
|
#define __M_SWAP__
|
|
|
|
#ifdef __GNUG__
|
|
#pragma interface
|
|
#endif
|
|
|
|
/* Endianess handling. */
|
|
|
|
/* cph - First the macros to do the actual byte swapping */
|
|
|
|
/* leban
|
|
* rather than continue the confusing tradition of redefining the
|
|
* stardard macro, we now present the doom_ntoh and doom_hton macros....
|
|
* might as well use the xdoom macros.
|
|
*/
|
|
|
|
#ifndef doom_swap_l
|
|
#define doom_swap_l(x) \
|
|
((long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \
|
|
(((unsigned long int)(x) & 0x0000ff00U) << 8) | \
|
|
(((unsigned long int)(x) & 0x00ff0000U) >> 8) | \
|
|
(((unsigned long int)(x) & 0xff000000U) >> 24)))
|
|
#endif
|
|
|
|
#ifndef doom_swap_s
|
|
#define doom_swap_s(x) \
|
|
((short int)((((unsigned short int)(x) & 0x00ff) << 8) | \
|
|
(((unsigned short int)(x) & 0xff00) >> 8)))
|
|
#endif
|
|
|
|
/* Macros are named doom_XtoYT, where
|
|
* X is thing to convert from, Y is thing to convert to, chosen from
|
|
* n for network, h for host (i.e our machine's), w for WAD (Doom data files)
|
|
* and T is the type, l or s for long or short
|
|
*
|
|
* CPhipps - all WADs and network packets will be little endian for now
|
|
* Use separate macros so network could be converted to big-endian later.
|
|
*/
|
|
|
|
#ifdef __BIG_ENDIAN__
|
|
|
|
#define doom_wtohl(x) doom_swap_l(x)
|
|
#define doom_htowl(x) doom_swap_l(x)
|
|
#define doom_wtohs(x) doom_swap_s(x)
|
|
#define doom_htows(x) doom_swap_s(x)
|
|
|
|
#define doom_ntohl(x) doom_swap_l(x)
|
|
#define doom_htonl(x) doom_swap_l(x)
|
|
#define doom_ntohs(x) doom_swap_s(x)
|
|
#define doom_htons(x) doom_swap_s(x)
|
|
|
|
#else
|
|
|
|
#define doom_wtohl(x) (long int)(x)
|
|
#define doom_htowl(x) (long int)(x)
|
|
#define doom_wtohs(x) (short int)(x)
|
|
#define doom_htows(x) (short int)(x)
|
|
|
|
#define doom_ntohl(x) (long int)(x)
|
|
#define doom_htonl(x) (long int)(x)
|
|
#define doom_ntohs(x) (short int)(x)
|
|
#define doom_htons(x) (short int)(x)
|
|
|
|
#endif
|
|
|
|
/* CPhipps - Boom's old LONG and SHORT endianness macros are for WAD stuff */
|
|
|
|
#define LONG(x) doom_wtohl(x)
|
|
#define SHORT(x) doom_htows(x)
|
|
|
|
#endif
|