DOOM-3-BFG

DOOM 3 BFG Edition
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m_swap.h (2325B)

      1 /*
      2 ===========================================================================
      3 
      4 Doom 3 BFG Edition GPL Source Code
      5 Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 
      6 
      7 This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  
      8 
      9 Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
     10 it under the terms of the GNU General Public License as published by
     11 the Free Software Foundation, either version 3 of the License, or
     12 (at your option) any later version.
     13 
     14 Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
     15 but WITHOUT ANY WARRANTY; without even the implied warranty of
     16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17 GNU General Public License for more details.
     18 
     19 You should have received a copy of the GNU General Public License
     20 along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.
     21 
     22 In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.
     23 
     24 If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
     25 
     26 ===========================================================================
     27 */
     28 
     29 #ifndef __M_SWAP__
     30 #define __M_SWAP__
     31 
     32 
     33 #ifdef __GNUG__
     34 #pragma interface
     35 #endif
     36 
     37 
     38 // Endianess handling.
     39 // WAD files are stored little endian.
     40 #ifdef __BIG_ENDIAN__
     41 //short	SwapSHORT(short);
     42 //long	SwapLONG(long);
     43 
     44 // Swap 16bit, that is, MSB and LSB byte.
     45 inline unsigned short SwapSHORT(unsigned short x)
     46 {
     47     // No masking with 0xFF should be necessary. 
     48     return (x>>8) | (x<<8);
     49 }
     50 
     51 // Swapping 32bit.
     52 inline unsigned long SwapLONG( unsigned long x)
     53 {
     54     return
     55 	(x>>24)
     56 	| ((x>>8) & 0xff00)
     57 	| ((x<<8) & 0xff0000)
     58 	| (x<<24);
     59 }
     60 
     61 
     62 #define SHORT(x)	((short)SwapSHORT((unsigned short) (x)))
     63 #define LONG(x)         ((long)SwapLONG((unsigned long) (x)))
     64 #else
     65 #define SHORT(x)	(x)
     66 #define LONG(x)         (x)
     67 #endif
     68 
     69 
     70 
     71 
     72 #endif
     73