Mercurial > sdl-ios-xcode
annotate include/SDL_byteorder.h @ 91:e85e03f195b4
From: "Markus F.X.J. Oberhumer"
Subject: SDL CVS patches
below you will find some small patches against the
current SDL CVS.
It adresses these things:
1) Use "&" instead of "%" in some cases. For negative
signed integers (x % 8) is not always (x & 7),
and the compiler can produce slightly faster
code when using "&" here.
2) Some const issues.
| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Sat, 07 Jul 2001 20:20:17 +0000 |
| parents | 71bf2ad74dfa |
| children | 83018110dce8 |
| rev | line source |
|---|---|
| 0 | 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 "@(#) $Id$"; | |
| 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 */ | |
|
24
71bf2ad74dfa
Fixed endian detection on IA64 architectures (thanks Bill!)
Sam Lantinga <slouken@lokigames.com>
parents:
1
diff
changeset
|
42 #if defined(__i386__) || defined(__ia64__) || defined(WIN32) || \ |
| 0 | 43 (defined(__alpha__) || defined(__alpha)) || \ |
| 44 defined(__arm__) || \ | |
|
1
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
45 (defined(__mips__) && defined(__MIPSEL__)) || \ |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
46 defined(__LITTLE_ENDIAN__) |
| 0 | 47 #define SDL_BYTEORDER SDL_LIL_ENDIAN |
| 48 #else | |
| 49 #define SDL_BYTEORDER SDL_BIG_ENDIAN | |
| 50 #endif | |
| 51 | |
| 52 #endif /* _SDL_byteorder_h */ |