File: UnalignedAccess.h

package info (click to toggle)
webkit2gtk 2.48.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 429,620 kB
  • sloc: cpp: 3,696,936; javascript: 194,444; ansic: 169,997; python: 46,499; asm: 19,276; ruby: 18,528; perl: 16,602; xml: 4,650; yacc: 2,360; sh: 2,098; java: 1,993; lex: 1,327; pascal: 366; makefile: 298
file content (54 lines) | stat: -rw-r--r-- 2,036 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
/*
 * Copyright (C) 2018 Yusuke Suzuki <yusukesuzuki@slowstart.org>.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <type_traits>
#include <wtf/Platform.h>
#include <wtf/StdLibExtras.h>

namespace WTF {

template<typename Type>
inline Type unalignedLoad(const void* pointer)
{
    static_assert(std::is_trivially_copyable<Type>::value);
    Type result { };
    WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
    memcpy(&result, pointer, sizeof(Type));
    WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
    return result;
}

template<typename Type>
inline void unalignedStore(void* pointer, Type value)
{
    static_assert(std::is_trivially_copyable<Type>::value);
    WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
    memcpy(pointer, &value, sizeof(Type));
    WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
}

} // namespace WTF