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1 /* | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 // Use of this source code is governed by a BSD-style license that can be |
3 * | 3 // found in the LICENSE file. |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | 4 |
31 #ifndef WTF_ByteSwap_h | 5 #include "platform/wtf/ByteSwap.h" |
32 #define WTF_ByteSwap_h | |
33 | 6 |
34 #include "wtf/CPU.h" | 7 // The contents of this header was moved to platform/wtf as part of |
35 #include "wtf/Compiler.h" | 8 // WTF migration project. See the following post for details: |
36 | 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY
CAAJ |
37 #include <stdint.h> | |
38 | |
39 #if COMPILER(MSVC) | |
40 #include <stdlib.h> | |
41 #endif | |
42 | |
43 namespace WTF { | |
44 | |
45 inline uint32_t wswap32(uint32_t x) { | |
46 return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16); | |
47 } | |
48 | |
49 #if COMPILER(MSVC) | |
50 | |
51 ALWAYS_INLINE uint64_t bswap64(uint64_t x) { | |
52 return _byteswap_uint64(x); | |
53 } | |
54 ALWAYS_INLINE uint32_t bswap32(uint32_t x) { | |
55 return _byteswap_ulong(x); | |
56 } | |
57 ALWAYS_INLINE uint16_t bswap16(uint16_t x) { | |
58 return _byteswap_ushort(x); | |
59 } | |
60 | |
61 #else | |
62 | |
63 ALWAYS_INLINE uint64_t bswap64(uint64_t x) { | |
64 return __builtin_bswap64(x); | |
65 } | |
66 ALWAYS_INLINE uint32_t bswap32(uint32_t x) { | |
67 return __builtin_bswap32(x); | |
68 } | |
69 ALWAYS_INLINE uint16_t bswap16(uint16_t x) { | |
70 return __builtin_bswap16(x); | |
71 } | |
72 | |
73 #endif | |
74 | |
75 #if CPU(64BIT) | |
76 | |
77 ALWAYS_INLINE size_t bswapuintptrt(size_t x) { | |
78 return bswap64(x); | |
79 } | |
80 | |
81 #else | |
82 | |
83 ALWAYS_INLINE size_t bswapuintptrt(size_t x) { | |
84 return bswap32(x); | |
85 } | |
86 | |
87 #endif | |
88 | |
89 } // namespace WTF | |
90 | |
91 #endif // WTF_ByteSwap_h | |
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