1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2004 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public 7 License as published by the Free Software Foundation; either 8 version 2 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Library General Public License for more details. 14 15 You should have received a copy of the GNU Library General Public 16 License along with this library; if not, write to the Free 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 23 #ifdef SAVE_RCSID 24 static char rcsid = 25 "@(#) $Id: SDL_byteorder.h,v 1.9 2004/11/12 22:09:17 slouken Exp $"; 26 #endif 27 28 /* Macros for determining the byte-order of this platform */ 29 30 #ifndef _SDL_byteorder_h 31 #define _SDL_byteorder_h 32 33 /* The two types of endianness */ 34 #define SDL_LIL_ENDIAN 1234 35 #define SDL_BIG_ENDIAN 4321 36 37 /* Pardon the mess, I'm trying to determine the endianness of this host. 38 I'm doing it by preprocessor defines rather than some sort of configure 39 script so that application code can use this too. The "right" way would 40 be to dynamically generate this file on install, but that's a lot of work. 41 */ 42 #if (defined(__i386__) || defined(__i386)) || \ 43 defined(__ia64__) || defined(WIN32) || \ 44 (defined(__alpha__) || defined(__alpha)) || \ 45 defined(__arm__) || \ 46 (defined(__mips__) && defined(__MIPSEL__)) || \ 47 defined(__SYMBIAN32__) || \ 48 defined(__x86_64__) || \ 49 defined(__LITTLE_ENDIAN__) 50 #define SDL_BYTEORDER SDL_LIL_ENDIAN 51 #else 52 #define SDL_BYTEORDER SDL_BIG_ENDIAN 53 #endif 54 55 #endif /* _SDL_byteorder_h */ 56
