1 /*
2 * Copyright (c) 2006-2023 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #ifndef _OS__OSBYTEORDER_H
30 #define _OS__OSBYTEORDER_H
31
32 #include <sys/_types.h>
33
34 /* Macros for swapping constant values in the preprocessing stage. */
35 #define __DARWIN_OSSwapConstInt16(x) \
36 ((__uint16_t)((((__uint16_t)(x) & 0xff00U) >> 8) | \
37 (((__uint16_t)(x) & 0x00ffU) << 8)))
38
39 #define __DARWIN_OSSwapConstInt32(x) \
40 ((__uint32_t)((((__uint32_t)(x) & 0xff000000U) >> 24) | \
41 (((__uint32_t)(x) & 0x00ff0000U) >> 8) | \
42 (((__uint32_t)(x) & 0x0000ff00U) << 8) | \
43 (((__uint32_t)(x) & 0x000000ffU) << 24)))
44
45 #define __DARWIN_OSSwapConstInt64(x) \
46 ((__uint64_t)((((__uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \
47 (((__uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \
48 (((__uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \
49 (((__uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \
50 (((__uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \
51 (((__uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \
52 (((__uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \
53 (((__uint64_t)(x) & 0x00000000000000ffULL) << 56)))
54
55 #if defined(__GNUC__)
56
57 #if defined(__i386__) || defined(__x86_64__)
58 #include <libkern/i386/_OSByteOrder.h>
59 #endif
60
61 #if defined (__arm__) || defined(__arm64__)
62 #include <libkern/arm/_OSByteOrder.h>
63 #endif
64
65
66 #define __DARWIN_OSSwapInt16(x) \
67 ((__uint16_t)(__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt16(x) : _OSSwapInt16(x)))
68
69 #define __DARWIN_OSSwapInt32(x) \
70 (__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt32(x) : _OSSwapInt32(x))
71
72 #define __DARWIN_OSSwapInt64(x) \
73 (__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt64(x) : _OSSwapInt64(x))
74
75 #else /* ! __GNUC__ */
76
77 #if defined(__i386__) || defined(__x86_64__)
78
79 #if !defined(__DARWIN_OS_INLINE)
80 # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
81 # define __DARWIN_OS_INLINE static inline
82 # elif defined(__MWERKS__) || defined(__cplusplus)
83 # define __DARWIN_OS_INLINE static inline
84 # else
85 # define __DARWIN_OS_INLINE static __inline__
86 # endif
87 #endif
88
89 __DARWIN_OS_INLINE
90 __uint16_t
_OSSwapInt16(__uint16_t data)91 _OSSwapInt16(
92 __uint16_t data
93 )
94 {
95 return __DARWIN_OSSwapConstInt16(data);
96 }
97
98 __DARWIN_OS_INLINE
99 __uint32_t
_OSSwapInt32(__uint32_t data)100 _OSSwapInt32(
101 __uint32_t data
102 )
103 {
104 return __DARWIN_OSSwapConstInt32(data);
105 }
106
107 __DARWIN_OS_INLINE
108 __uint64_t
_OSSwapInt64(__uint64_t data)109 _OSSwapInt64(
110 __uint64_t data
111 )
112 {
113 return __DARWIN_OSSwapConstInt64(data);
114 }
115 #endif
116
117 #define __DARWIN_OSSwapInt16(x) _OSSwapInt16(x)
118
119 #define __DARWIN_OSSwapInt32(x) _OSSwapInt32(x)
120
121 #define __DARWIN_OSSwapInt64(x) _OSSwapInt64(x)
122
123 #endif /* __GNUC__ */
124
125 #endif /* ! _OS__OSBYTEORDER_H */
126