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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (C) 2010 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.
*/
#ifndef NetworkCacheEncoder_h
#define NetworkCacheEncoder_h
#if ENABLE(NETWORK_CACHE)
#include "NetworkCacheCoder.h"
#include <wtf/SHA1.h>
#include <wtf/Vector.h>
namespace WebKit {
namespace NetworkCache {
class Encoder;
class DataReference;
class Encoder {
WTF_MAKE_FAST_ALLOCATED;
public:
Encoder();
virtual ~Encoder();
void encodeChecksum();
void encodeFixedLengthData(const uint8_t*, size_t);
template<typename T> void encodeEnum(T t)
{
COMPILE_ASSERT(sizeof(T) <= sizeof(uint64_t), enum_type_must_not_be_larger_than_64_bits);
encode(static_cast<uint64_t>(t));
}
template<typename T> void encode(const T& t)
{
Coder<T>::encode(*this, t);
}
template<typename T> Encoder& operator<<(const T& t)
{
encode(t);
return *this;
}
const uint8_t* buffer() const { return m_buffer.data(); }
size_t bufferSize() const { return m_buffer.size(); }
static void updateChecksumForData(SHA1&, const uint8_t*, size_t);
template <typename Type> static void updateChecksumForNumber(SHA1&, Type);
private:
void encode(bool);
void encode(uint8_t);
void encode(uint16_t);
void encode(uint32_t);
void encode(uint64_t);
void encode(int32_t);
void encode(int64_t);
void encode(float);
void encode(double);
template<typename Type> void encodeNumber(Type);
uint8_t* grow(size_t);
template <typename Type> struct Salt;
Vector<uint8_t, 4096> m_buffer;
SHA1 m_sha1;
};
template <> struct Encoder::Salt<bool> { static const unsigned value = 3; };
template <> struct Encoder::Salt<uint8_t> { static const unsigned value = 5; };
template <> struct Encoder::Salt<uint16_t> { static const unsigned value = 7; };
template <> struct Encoder::Salt<uint32_t> { static const unsigned value = 11; };
template <> struct Encoder::Salt<uint64_t> { static const unsigned value = 13; };
template <> struct Encoder::Salt<int32_t> { static const unsigned value = 17; };
template <> struct Encoder::Salt<int64_t> { static const unsigned value = 19; };
template <> struct Encoder::Salt<float> { static const unsigned value = 23; };
template <> struct Encoder::Salt<double> { static const unsigned value = 29; };
template <> struct Encoder::Salt<uint8_t*> { static const unsigned value = 101; };
template <typename Type>
void Encoder::updateChecksumForNumber(SHA1& sha1, Type value)
{
auto typeSalt = Salt<Type>::value;
sha1.addBytes(reinterpret_cast<uint8_t*>(&typeSalt), sizeof(typeSalt));
sha1.addBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
}
}
}
#endif
#endif
|
