1/*
2 * Copyright (C) 2011, 2014-2015 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include <wtf/persistence/PersistentCoders.h>
28
29#include <wtf/text/CString.h>
30#include <wtf/text/WTFString.h>
31
32namespace WTF {
33namespace Persistence {
34
35void Coder<AtomicString>::encode(Encoder& encoder, const AtomicString& atomicString)
36{
37 encoder << atomicString.string();
38}
39
40bool Coder<AtomicString>::decode(Decoder& decoder, AtomicString& atomicString)
41{
42 String string;
43 if (!decoder.decode(string))
44 return false;
45
46 atomicString = string;
47 return true;
48}
49
50void Coder<CString>::encode(Encoder& encoder, const CString& string)
51{
52 // Special case the null string.
53 if (string.isNull()) {
54 encoder << std::numeric_limits<uint32_t>::max();
55 return;
56 }
57
58 uint32_t length = string.length();
59 encoder << length;
60 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.data()), length);
61}
62
63bool Coder<CString>::decode(Decoder& decoder, CString& result)
64{
65 uint32_t length;
66 if (!decoder.decode(length))
67 return false;
68
69 if (length == std::numeric_limits<uint32_t>::max()) {
70 // This is the null string.
71 result = CString();
72 return true;
73 }
74
75 // Before allocating the string, make sure that the decoder buffer is big enough.
76 if (!decoder.bufferIsLargeEnoughToContain<char>(length))
77 return false;
78
79 char* buffer;
80 CString string = CString::newUninitialized(length, buffer);
81 if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length))
82 return false;
83
84 result = string;
85 return true;
86}
87
88
89void Coder<String>::encode(Encoder& encoder, const String& string)
90{
91 // Special case the null string.
92 if (string.isNull()) {
93 encoder << std::numeric_limits<uint32_t>::max();
94 return;
95 }
96
97 uint32_t length = string.length();
98 bool is8Bit = string.is8Bit();
99
100 encoder << length << is8Bit;
101
102 if (is8Bit)
103 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters8()), length * sizeof(LChar));
104 else
105 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters16()), length * sizeof(UChar));
106}
107
108template <typename CharacterType>
109static inline bool decodeStringText(Decoder& decoder, uint32_t length, String& result)
110{
111 // Before allocating the string, make sure that the decoder buffer is big enough.
112 if (!decoder.bufferIsLargeEnoughToContain<CharacterType>(length))
113 return false;
114
115 CharacterType* buffer;
116 String string = String::createUninitialized(length, buffer);
117 if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length * sizeof(CharacterType)))
118 return false;
119
120 result = string;
121 return true;
122}
123
124bool Coder<String>::decode(Decoder& decoder, String& result)
125{
126 uint32_t length;
127 if (!decoder.decode(length))
128 return false;
129
130 if (length == std::numeric_limits<uint32_t>::max()) {
131 // This is the null string.
132 result = String();
133 return true;
134 }
135
136 bool is8Bit;
137 if (!decoder.decode(is8Bit))
138 return false;
139
140 if (is8Bit)
141 return decodeStringText<LChar>(decoder, length, result);
142 return decodeStringText<UChar>(decoder, length, result);
143}
144
145void Coder<SHA1::Digest>::encode(Encoder& encoder, const SHA1::Digest& digest)
146{
147 encoder.encodeFixedLengthData(digest.data(), sizeof(digest));
148}
149
150bool Coder<SHA1::Digest>::decode(Decoder& decoder, SHA1::Digest& digest)
151{
152 return decoder.decodeFixedLengthData(digest.data(), sizeof(digest));
153}
154
155}
156}
157