annotate include/SDL_byteorder.h @ 0:74212992fb08

Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Macros for determining the byte-order of this platform */
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29
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30 #ifndef _SDL_byteorder_h
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31 #define _SDL_byteorder_h
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32
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33 /* The two types of endianness */
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34 #define SDL_LIL_ENDIAN 1234
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35 #define SDL_BIG_ENDIAN 4321
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36
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37 /* Pardon the mess, I'm trying to determine the endianness of this host.
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38 I'm doing it by preprocessor defines rather than some sort of configure
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39 script so that application code can use this too. The "right" way would
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40 be to dynamically generate this file on install, but that's a lot of work.
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41 */
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42 #if defined(__i386__) || defined(WIN32) || \
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43 (defined(__alpha__) || defined(__alpha)) || \
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44 defined(__arm__) || \
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45 (defined(__mips__) && defined(__MIPSEL__))
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46 #define SDL_BYTEORDER SDL_LIL_ENDIAN
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47 #else
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48 #define SDL_BYTEORDER SDL_BIG_ENDIAN
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49 #endif
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50
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51 #endif /* _SDL_byteorder_h */