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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
91_OSSwapInt16(
92 __uint16_t data
93 )
94{
95 return __DARWIN_OSSwapConstInt16(data);
96}
97
98__DARWIN_OS_INLINE
99__uint32_t
100_OSSwapInt32(
101 __uint32_t data
102 )
103{
104 return __DARWIN_OSSwapConstInt32(data);
105}
106
107__DARWIN_OS_INLINE
108__uint64_t
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 */