| 1 | /*␊ |
| 2 | * Copyright (c) 2006 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 | /*␊ |
| 33 | * This header is normally included from <libkern/OSByteOrder.h>. However,␊ |
| 34 | * <sys/_endian.h> also includes this in the case of little-endian␊ |
| 35 | * architectures, so that we can map OSByteOrder routines to the hton* and ntoh*␊ |
| 36 | * macros. This results in the asymmetry below; we only include␊ |
| 37 | * <libkern/arch/_OSByteOrder.h> for little-endian architectures.␊ |
| 38 | */␊ |
| 39 | ␊ |
| 40 | //#include <sys/_types.h>␊ |
| 41 | ␊ |
| 42 | /* Macros for swapping constant values in the preprocessing stage. */␊ |
| 43 | #define __DARWIN_OSSwapConstInt16(x) \␊ |
| 44 | ((__uint16_t)((((__uint16_t)(x) & 0xff00) >> 8) | \␊ |
| 45 | (((__uint16_t)(x) & 0x00ff) << 8)))␊ |
| 46 | ␊ |
| 47 | #define __DARWIN_OSSwapConstInt32(x) \␊ |
| 48 | ((__uint32_t)((((__uint32_t)(x) & 0xff000000) >> 24) | \␊ |
| 49 | (((__uint32_t)(x) & 0x00ff0000) >> 8) | \␊ |
| 50 | (((__uint32_t)(x) & 0x0000ff00) << 8) | \␊ |
| 51 | (((__uint32_t)(x) & 0x000000ff) << 24)))␊ |
| 52 | ␊ |
| 53 | #define __DARWIN_OSSwapConstInt64(x) \␊ |
| 54 | ((__uint64_t)((((__uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \␊ |
| 55 | (((__uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \␊ |
| 56 | (((__uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \␊ |
| 57 | (((__uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \␊ |
| 58 | (((__uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \␊ |
| 59 | (((__uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \␊ |
| 60 | (((__uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \␊ |
| 61 | (((__uint64_t)(x) & 0x00000000000000ffULL) << 56)))␊ |
| 62 | ␊ |
| 63 | #if defined(__GNUC__)␊ |
| 64 | ␊ |
| 65 | #if defined(__i386__) || defined(__x86_64__)␊ |
| 66 | #include <libkern/i386/_OSByteOrder.h>␊ |
| 67 | #endif␊ |
| 68 | ␊ |
| 69 | #if defined(__arm__)␊ |
| 70 | #include <libkern/arm/OSByteOrder.h>␊ |
| 71 | #endif␊ |
| 72 | ␊ |
| 73 | ␊ |
| 74 | #define __DARWIN_OSSwapInt16(x) \␊ |
| 75 | (__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt16(x) : _OSSwapInt16(x))␊ |
| 76 | ␊ |
| 77 | #define __DARWIN_OSSwapInt32(x) \␊ |
| 78 | (__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt32(x) : _OSSwapInt32(x))␊ |
| 79 | ␊ |
| 80 | #define __DARWIN_OSSwapInt64(x) \␊ |
| 81 | (__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt64(x) : _OSSwapInt64(x))␊ |
| 82 | ␊ |
| 83 | #else /* ! __GNUC__ */␊ |
| 84 | ␊ |
| 85 | #if defined(__i386__) || defined(__x86_64__)␊ |
| 86 | ␊ |
| 87 | #if !defined(__DARWIN_OS_INLINE)␊ |
| 88 | # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊ |
| 89 | # define __DARWIN_OS_INLINE static inline␊ |
| 90 | # elif defined(__MWERKS__) || defined(__cplusplus)␊ |
| 91 | # define __DARWIN_OS_INLINE static inline␊ |
| 92 | # else␊ |
| 93 | # define __DARWIN_OS_INLINE static __inline__␊ |
| 94 | # endif␊ |
| 95 | #endif␊ |
| 96 | ␊ |
| 97 | __DARWIN_OS_INLINE␊ |
| 98 | uint16_t␊ |
| 99 | _OSSwapInt16(␊ |
| 100 | uint16_t␉␉␉data␊ |
| 101 | )␊ |
| 102 | {␊ |
| 103 | return __DARWIN_OSSwapConstInt16(data);␊ |
| 104 | }␊ |
| 105 | ␊ |
| 106 | __DARWIN_OS_INLINE␊ |
| 107 | uint32_t␊ |
| 108 | _OSSwapInt32(␊ |
| 109 | uint32_t␉␉␉data␊ |
| 110 | )␊ |
| 111 | {␊ |
| 112 | return __DARWIN_OSSwapConstInt32(data);␊ |
| 113 | }␊ |
| 114 | ␊ |
| 115 | __DARWIN_OS_INLINE␊ |
| 116 | uint64_t␊ |
| 117 | _OSSwapInt64(␊ |
| 118 | uint64_t␉␉␉data␊ |
| 119 | )␊ |
| 120 | {␊ |
| 121 | return __DARWIN_OSSwapConstInt64(data);␊ |
| 122 | }␊ |
| 123 | #endif␊ |
| 124 | ␊ |
| 125 | #define __DARWIN_OSSwapInt16(x) _OSSwapInt16(x)␊ |
| 126 | ␊ |
| 127 | #define __DARWIN_OSSwapInt32(x) _OSSwapInt32(x)␊ |
| 128 | ␊ |
| 129 | #define __DARWIN_OSSwapInt64(x) _OSSwapInt64(x)␊ |
| 130 | ␊ |
| 131 | #endif /* __GNUC__ */␊ |
| 132 | ␊ |
| 133 | #endif /* ! _OS__OSBYTEORDER_H */␊ |
| 134 | |
