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  1. /*
  2.     SDL - Simple DirectMedia Layer
  3.     Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
  21. */
  22.  
  23. #ifdef SAVE_RCSID
  24. static char rcsid =
  25.  "@(#) $Id: SDL_byteorder.h,v 1.3 2001/05/10 20:25:51 hercules 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(__ia64__) || defined(WIN32) || \
  43.     (defined(__alpha__) || defined(__alpha)) || \
  44.      defined(__arm__) || \
  45.     (defined(__mips__) && defined(__MIPSEL__)) || \
  46.      defined(__LITTLE_ENDIAN__)
  47. #define SDL_BYTEORDER   SDL_LIL_ENDIAN
  48. #else
  49. #define SDL_BYTEORDER   SDL_BIG_ENDIAN
  50. #endif
  51.  
  52. #endif /* _SDL_byteorder_h */
  53.