Byte order detection fixes in SDL_endian.h ...
authorRyan C. Gordon <icculus@icculus.org>
Thu, 08 Sep 2005 06:49:20 +0000
changeset 11370f9d463bf09c
parent 1136 d16c010d5d98
child 1138 fcfb783a3ca2
Byte order detection fixes in SDL_endian.h ...

--ryan.




From: Mike Frysinger <vapier@gentoo.org>
To: sdl@libsdl.org
Date: Thu, 1 Sep 2005 20:25:01 -0400
Subject: [SDL] [patch] add support for arm/thumb and superh to endian

find attached a patch to add support for detecting endian on superh and
arm/thumb ... also, ive incorporated a patch from Fedora which will gather
the correct endian on a linux host from the system endian.h instead of just
trying to maintain an ever-growing list of architectures
-mike
include/SDL_byteorder.h
     1.1 --- a/include/SDL_byteorder.h	Thu Sep 08 06:43:51 2005 +0000
     1.2 +++ b/include/SDL_byteorder.h	Thu Sep 08 06:49:20 2005 +0000
     1.3 @@ -34,6 +34,16 @@
     1.4  #define SDL_LIL_ENDIAN	1234
     1.5  #define SDL_BIG_ENDIAN	4321
     1.6  
     1.7 +#ifdef __linux__
     1.8 +# include <endian.h>
     1.9 +# if BYTE_ORDER == LITTLE_ENDIAN
    1.10 +#  define SDL_BYTEORDER SDL_LIL_ENDIAN
    1.11 +# else
    1.12 +#  define SDL_BYTEORDER SDL_BIG_ENDIAN
    1.13 +# endif
    1.14 +
    1.15 +#else
    1.16 +
    1.17  /* Pardon the mess, I'm trying to determine the endianness of this host.
    1.18     I'm doing it by preprocessor defines rather than some sort of configure
    1.19     script so that application code can use this too.  The "right" way would
    1.20 @@ -42,7 +52,8 @@
    1.21  #if (defined(__i386__) || defined(__i386)) || \
    1.22       defined(__ia64__) || defined(WIN32) || \
    1.23      (defined(__alpha__) || defined(__alpha)) || \
    1.24 -     defined(__arm__) || \
    1.25 +    (defined(__arm__) || defined(__thumb__)) || \
    1.26 +    (defined(__sh__) || defined(__sh64__)) || \
    1.27      (defined(__mips__) && defined(__MIPSEL__)) || \
    1.28       defined(__SYMBIAN32__) || \
    1.29       defined(__x86_64__) || \
    1.30 @@ -52,4 +63,6 @@
    1.31  #define SDL_BYTEORDER	SDL_BIG_ENDIAN
    1.32  #endif
    1.33  
    1.34 +#endif /* __linux__ */
    1.35 +
    1.36  #endif /* _SDL_byteorder_h */