include/SDL_byteorder.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 01 Feb 2006 06:32:25 +0000
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Updated copyright information and removed rcs id lines (problematic in branch merges) I batch edited these files, so please let me know if I've accidentally removed anybody's credit here.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/* Macros for determining the byte-order of this platform */
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#ifndef _SDL_byteorder_h
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#define _SDL_byteorder_h
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/* The two types of endianness */
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#define SDL_LIL_ENDIAN	1234
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#define SDL_BIG_ENDIAN	4321
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#ifdef __linux__
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# include <endian.h>
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# if BYTE_ORDER == LITTLE_ENDIAN
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#  define SDL_BYTEORDER SDL_LIL_ENDIAN
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# else
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#  define SDL_BYTEORDER SDL_BIG_ENDIAN
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# endif
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#else
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/* Pardon the mess, I'm trying to determine the endianness of this host.
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   I'm doing it by preprocessor defines rather than some sort of configure
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   script so that application code can use this too.  The "right" way would
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   be to dynamically generate this file on install, but that's a lot of work.
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 */
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#if (defined(__i386__) || defined(__i386)) || \
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     defined(__ia64__) || defined(WIN32) || \
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    (defined(__alpha__) || defined(__alpha)) || \
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    (defined(__arm__) || defined(__thumb__)) || \
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    (defined(__sh__) || defined(__sh64__)) || \
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    (defined(__mips__) && defined(__MIPSEL__)) || \
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     defined(__SYMBIAN32__) || defined(__x86_64__) || \
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     defined(__OS2__) || defined(__LITTLE_ENDIAN__)
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#define SDL_BYTEORDER	SDL_LIL_ENDIAN
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#else
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#define SDL_BYTEORDER	SDL_BIG_ENDIAN
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#endif
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#endif /* __linux__ */
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#endif /* _SDL_byteorder_h */