include/SDL_byteorder.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 01 Feb 2006 06:32:25 +0000
changeset 1312 c9b51268668f
parent 1190 173c063d4f55
child 1353 7ba544e2888d
permissions -rw-r--r--
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.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 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     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 /* Macros for determining the byte-order of this platform */
    24 
    25 #ifndef _SDL_byteorder_h
    26 #define _SDL_byteorder_h
    27 
    28 /* The two types of endianness */
    29 #define SDL_LIL_ENDIAN	1234
    30 #define SDL_BIG_ENDIAN	4321
    31 
    32 #ifdef __linux__
    33 # include <endian.h>
    34 # if BYTE_ORDER == LITTLE_ENDIAN
    35 #  define SDL_BYTEORDER SDL_LIL_ENDIAN
    36 # else
    37 #  define SDL_BYTEORDER SDL_BIG_ENDIAN
    38 # endif
    39 
    40 #else
    41 
    42 /* Pardon the mess, I'm trying to determine the endianness of this host.
    43    I'm doing it by preprocessor defines rather than some sort of configure
    44    script so that application code can use this too.  The "right" way would
    45    be to dynamically generate this file on install, but that's a lot of work.
    46  */
    47 #if (defined(__i386__) || defined(__i386)) || \
    48      defined(__ia64__) || defined(WIN32) || \
    49     (defined(__alpha__) || defined(__alpha)) || \
    50     (defined(__arm__) || defined(__thumb__)) || \
    51     (defined(__sh__) || defined(__sh64__)) || \
    52     (defined(__mips__) && defined(__MIPSEL__)) || \
    53      defined(__SYMBIAN32__) || defined(__x86_64__) || \
    54      defined(__OS2__) || defined(__LITTLE_ENDIAN__)
    55 #define SDL_BYTEORDER	SDL_LIL_ENDIAN
    56 #else
    57 #define SDL_BYTEORDER	SDL_BIG_ENDIAN
    58 #endif
    59 
    60 #endif /* __linux__ */
    61 
    62 #endif /* _SDL_byteorder_h */