Mercurial > sdl-ios-xcode

annotate include/SDL_endian.h @ 1060:86885b40a53b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Support SDL_VIDEO_X11_NODIRECTCOLOR for OpenGL visuals
author Sam Lantinga <slouken@libsdl.org>
date Mon, 16 May 2005 08:23:34 +0000
parents d36ea7925763
children c9b51268668f
rev   line source
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
1 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
769
b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents: 337
diff changeset
3 Copyright (C) 1997-2004 Sam Lantinga
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
4
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
6 modify it under the terms of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
8 version 2 of the License, or (at your option) any later version.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
9
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
13 Library General Public License for more details.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
14
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
15 You should have received a copy of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
16 License along with this library; if not, write to the Free
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
18
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
19 Sam Lantinga
251
b8688cfdc232 Updated the headers with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
20 slouken@libsdl.org
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
21 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
22
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
23 #ifdef SAVE_RCSID
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
24 static char rcsid =
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
25 "@(#) $Id$";
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
26 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
27
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
28 /* Functions for reading and writing endian-specific values */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
29
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
30 #ifndef _SDL_endian_h
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31 #define _SDL_endian_h
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
32
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 /* These functions read and write data of the specified endianness,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
34 dynamically translating to the host machine endianness.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
35
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
36 e.g.: If you want to read a 16 bit value on big-endian machine from
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
37 an open file containing little endian values, you would use:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
38 value = SDL_ReadLE16(rp);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
39 Note that the read/write functions use SDL_RWops pointers
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
40 instead of FILE pointers. This allows you to read and write
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
41 endian values from large chunks of memory as well as files
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
42 and other data sources.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
43 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
44
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
45 #include <stdio.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
46
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
47 #include "SDL_types.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
48 #include "SDL_rwops.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
49 #include "SDL_byteorder.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
50
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
51 #include "begin_code.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
52 /* Set up for C function definitions, even when using C++ */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
53 #ifdef __cplusplus
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
54 extern "C" {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
55 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
56
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
57 /* Use inline functions for compilers that support them, and static
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
58 functions for those that do not. Because these functions become
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
59 static for compilers that do not support inline functions, this
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
60 header should only be included in files that actually use them.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
61 */
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
62 #if defined(__GNUC__) && defined(__i386__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
63 static __inline__ Uint16 SDL_Swap16(Uint16 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
64 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
65 __asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
66 return x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
67 }
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
68 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
69 static __inline__ Uint16 SDL_Swap16(Uint16 x)
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
70 {
1033
aebfa3ce2a53 The fix is going back in. :)
Sam Lantinga <slouken@libsdl.org>
parents: 1031
diff changeset
71 __asm__("xchgb %b0,%h0" : "=Q" (x) : "0" (x));
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
72 return x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
73 }
859
6b28c91bf3d2 This works on MacOS X too. :)
Sam Lantinga <slouken@libsdl.org>
parents: 849
diff changeset
74 #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
75 static __inline__ Uint16 SDL_Swap16(Uint16 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
76 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
77 Uint16 result;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
78
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
79 __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
80 return result;
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
81 }
1044
d36ea7925763 Optimize also for 68020 and higher CPUs
Patrice Mandin <patmandin@gmail.com>
parents: 1033
diff changeset
82 #elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__))
985
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
83 static __inline__ Uint16 SDL_Swap16(Uint16 x)
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
84 {
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
85 __asm__("rorw #8,%0" : "=d" (x) : "0" (x) : "cc");
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
86 return x;
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
87 }
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
88 #else
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
89 static __inline__ Uint16 SDL_Swap16(Uint16 x) {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
90 return((x<<8)|(x>>8));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
91 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
92 #endif
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
93
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
94 #if defined(__GNUC__) && defined(__i386__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
95 static __inline__ Uint32 SDL_Swap32(Uint32 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
96 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
97 __asm__("bswap %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
98 return x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
99 }
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
100 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
101 static __inline__ Uint32 SDL_Swap32(Uint32 x)
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
102 {
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
103 __asm__("bswapl %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
104 return x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
105 }
859
6b28c91bf3d2 This works on MacOS X too. :)
Sam Lantinga <slouken@libsdl.org>
parents: 849
diff changeset
106 #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
107 static __inline__ Uint32 SDL_Swap32(Uint32 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
108 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
109 Uint32 result;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
110
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
111 __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
112 __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
113 __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
114 return result;
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
115 }
1044
d36ea7925763 Optimize also for 68020 and higher CPUs
Patrice Mandin <patmandin@gmail.com>
parents: 1033
diff changeset
116 #elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__))
994
c4e5473672b6 Wrong size of parameters for SDL_Swap32 m68k assembly routine
Patrice Mandin <patmandin@gmail.com>
parents: 985
diff changeset
117 static __inline__ Uint32 SDL_Swap32(Uint32 x)
985
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
118 {
1044
d36ea7925763 Optimize also for 68020 and higher CPUs
Patrice Mandin <patmandin@gmail.com>
parents: 1033
diff changeset
119 __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0" : "=d" (x) : "0" (x) : "cc");
985
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
120 return x;
cec525374267 Add m68k assembly routines for endianness conversion
Patrice Mandin <patmandin@gmail.com>
parents: 859
diff changeset
121 }
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
122 #else
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
123 static __inline__ Uint32 SDL_Swap32(Uint32 x) {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
124 return((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
125 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
126 #endif
848
85af65457959 Avoid using kernel internal headers
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
127
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
128 #ifdef SDL_HAS_64BIT_TYPE
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
129 #if defined(__GNUC__) && defined(__i386__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
130 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
131 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
132 union {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
133 struct { Uint32 a,b; } s;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
134 Uint64 u;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
135 } v;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
136 v.u = x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
137 __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
138 : "=r" (v.s.a), "=r" (v.s.b)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
139 : "0" (v.s.a), "1" (v.s.b));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
140 return v.u;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
141 }
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
142 #elif defined(__GNUC__) && defined(__x86_64__)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
143 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
144 {
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
145 __asm__("bswapq %0" : "=r" (x) : "0" (x));
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
146 return x;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
147 }
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
148 #else
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
149 static __inline__ Uint64 SDL_Swap64(Uint64 x)
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
150 {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
151 Uint32 hi, lo;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
152
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
153 /* Separate into high and low 32-bit values and swap them */
849
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
154 lo = (Uint32)(x&0xFFFFFFFF);
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
155 x >>= 32;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
156 hi = (Uint32)(x&0xFFFFFFFF);
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
157 x = SDL_Swap32(lo);
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
158 x <<= 32;
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
159 x |= SDL_Swap32(hi);
bab227101de4 Added inline byte swapping code for other architectures
Sam Lantinga <slouken@libsdl.org>
parents: 848
diff changeset
160 return(x);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
161 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
162 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
163 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
164 /* This is mainly to keep compilers from complaining in SDL code.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
165 If there is no real 64-bit datatype, then compilers will complain about
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
166 the fake 64-bit datatype that SDL provides when it compiles user code.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 #define SDL_Swap64(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
169 #endif /* SDL_HAS_64BIT_TYPE */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 /* Byteswap item from the specified endianness to the native endianness */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 #define SDL_SwapLE16(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 #define SDL_SwapLE32(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 #define SDL_SwapLE64(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 #define SDL_SwapBE16(X) SDL_Swap16(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178 #define SDL_SwapBE32(X) SDL_Swap32(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 #define SDL_SwapBE64(X) SDL_Swap64(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 #define SDL_SwapLE16(X) SDL_Swap16(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 #define SDL_SwapLE32(X) SDL_Swap32(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183 #define SDL_SwapLE64(X) SDL_Swap64(X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 #define SDL_SwapBE16(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 #define SDL_SwapBE32(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186 #define SDL_SwapBE64(X) (X)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 /* Read an item of the specified endianness and return in native format */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
190 extern DECLSPEC Uint16 SDLCALL SDL_ReadLE16(SDL_RWops *src);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
191 extern DECLSPEC Uint16 SDLCALL SDL_ReadBE16(SDL_RWops *src);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
192 extern DECLSPEC Uint32 SDLCALL SDL_ReadLE32(SDL_RWops *src);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
193 extern DECLSPEC Uint32 SDLCALL SDL_ReadBE32(SDL_RWops *src);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
194 extern DECLSPEC Uint64 SDLCALL SDL_ReadLE64(SDL_RWops *src);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
195 extern DECLSPEC Uint64 SDLCALL SDL_ReadBE64(SDL_RWops *src);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 /* Write an item of native format to the specified endianness */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
198 extern DECLSPEC int SDLCALL SDL_WriteLE16(SDL_RWops *dst, Uint16 value);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
199 extern DECLSPEC int SDLCALL SDL_WriteBE16(SDL_RWops *dst, Uint16 value);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
200 extern DECLSPEC int SDLCALL SDL_WriteLE32(SDL_RWops *dst, Uint32 value);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
201 extern DECLSPEC int SDLCALL SDL_WriteBE32(SDL_RWops *dst, Uint32 value);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
202 extern DECLSPEC int SDLCALL SDL_WriteLE64(SDL_RWops *dst, Uint64 value);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
203 extern DECLSPEC int SDLCALL SDL_WriteBE64(SDL_RWops *dst, Uint64 value);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 /* Ends C function definitions when using C++ */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 #ifdef __cplusplus
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 #include "close_code.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 #endif /* _SDL_endian_h */