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
55
56
57
58
59
60
61
62
63
64
65
|
/*
* Copyright (C) 2021 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#include "config.h"
#include "DaemonDecoder.h"
#include <wtf/StdLibExtras.h>
namespace WebKit {
namespace Daemon {
Decoder::~Decoder()
{
ASSERT(m_bufferPosition == m_buffer.size());
}
bool Decoder::bufferIsLargeEnoughToContainBytes(size_t bytes) const
{
return bytes <= m_buffer.size() - m_bufferPosition;
}
bool Decoder::decodeFixedLengthData(std::span<uint8_t> data)
{
if (!bufferIsLargeEnoughToContainBytes(data.size()))
return false;
memcpySpan(data, m_buffer.subspan(m_bufferPosition, data.size()));
m_bufferPosition += data.size();
return true;
}
std::span<const uint8_t> Decoder::decodeFixedLengthReference(size_t size)
{
if (!bufferIsLargeEnoughToContainBytes(size))
return { };
auto data = m_buffer.subspan(m_bufferPosition, size);
m_bufferPosition += size;
return data;
}
} // namespace Daemon
} // namespace WebKit
|
