1/*
2 * Copyright (C) 2011 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 "ArgumentCoders.h"
28
29#include "DataReference.h"
30#include <wtf/text/CString.h>
31#include <wtf/text/WTFString.h>
32
33namespace IPC {
34
35void ArgumentCoder<WallTime>::encode(Encoder& encoder, const WallTime& time)
36{
37 encoder << time.secondsSinceEpoch().value();
38}
39
40bool ArgumentCoder<WallTime>::decode(Decoder& decoder, WallTime& time)
41{
42 double value;
43 if (!decoder.decode(value))
44 return false;
45
46 time = WallTime::fromRawSeconds(value);
47 return true;
48}
49
50Optional<WallTime> ArgumentCoder<WallTime>::decode(Decoder& decoder)
51{
52 Optional<double> time;
53 decoder >> time;
54 if (!time)
55 return WTF::nullopt;
56 return WallTime::fromRawSeconds(*time);
57}
58
59void ArgumentCoder<AtomicString>::encode(Encoder& encoder, const AtomicString& atomicString)
60{
61 encoder << atomicString.string();
62}
63
64bool ArgumentCoder<AtomicString>::decode(Decoder& decoder, AtomicString& atomicString)
65{
66 String string;
67 if (!decoder.decode(string))
68 return false;
69
70 atomicString = string;
71 return true;
72}
73
74void ArgumentCoder<CString>::encode(Encoder& encoder, const CString& string)
75{
76 // Special case the null string.
77 if (string.isNull()) {
78 encoder << std::numeric_limits<uint32_t>::max();
79 return;
80 }
81
82 uint32_t length = string.length();
83 encoder << length;
84 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.data()), length, 1);
85}
86
87bool ArgumentCoder<CString>::decode(Decoder& decoder, CString& result)
88{
89 uint32_t length;
90 if (!decoder.decode(length))
91 return false;
92
93 if (length == std::numeric_limits<uint32_t>::max()) {
94 // This is the null string.
95 result = CString();
96 return true;
97 }
98
99 // Before allocating the string, make sure that the decoder buffer is big enough.
100 if (!decoder.bufferIsLargeEnoughToContain<char>(length)) {
101 decoder.markInvalid();
102 return false;
103 }
104
105 char* buffer;
106 CString string = CString::newUninitialized(length, buffer);
107 if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length, 1))
108 return false;
109
110 result = string;
111 return true;
112}
113
114
115void ArgumentCoder<String>::encode(Encoder& encoder, const String& string)
116{
117 // Special case the null string.
118 if (string.isNull()) {
119 encoder << std::numeric_limits<uint32_t>::max();
120 return;
121 }
122
123 uint32_t length = string.length();
124 bool is8Bit = string.is8Bit();
125
126 encoder << length << is8Bit;
127
128 if (is8Bit)
129 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters8()), length * sizeof(LChar), alignof(LChar));
130 else
131 encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(string.characters16()), length * sizeof(UChar), alignof(UChar));
132}
133
134template <typename CharacterType>
135static inline bool decodeStringText(Decoder& decoder, uint32_t length, String& result)
136{
137 // Before allocating the string, make sure that the decoder buffer is big enough.
138 if (!decoder.bufferIsLargeEnoughToContain<CharacterType>(length)) {
139 decoder.markInvalid();
140 return false;
141 }
142
143 CharacterType* buffer;
144 String string = String::createUninitialized(length, buffer);
145 if (!decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length * sizeof(CharacterType), alignof(CharacterType)))
146 return false;
147
148 result = string;
149 return true;
150}
151
152bool ArgumentCoder<String>::decode(Decoder& decoder, String& result)
153{
154 uint32_t length;
155 if (!decoder.decode(length))
156 return false;
157
158 if (length == std::numeric_limits<uint32_t>::max()) {
159 // This is the null string.
160 result = String();
161 return true;
162 }
163
164 bool is8Bit;
165 if (!decoder.decode(is8Bit))
166 return false;
167
168 if (is8Bit)
169 return decodeStringText<LChar>(decoder, length, result);
170 return decodeStringText<UChar>(decoder, length, result);
171}
172
173Optional<String> ArgumentCoder<String>::decode(Decoder& decoder)
174{
175 uint32_t length;
176 if (!decoder.decode(length))
177 return WTF::nullopt;
178
179 if (length == std::numeric_limits<uint32_t>::max()) {
180 // This is the null string.
181 return String();
182 }
183
184 bool is8Bit;
185 if (!decoder.decode(is8Bit))
186 return WTF::nullopt;
187
188 String result;
189 if (is8Bit) {
190 if (!decodeStringText<LChar>(decoder, length, result))
191 return WTF::nullopt;
192 return result;
193 }
194 if (!decodeStringText<UChar>(decoder, length, result))
195 return WTF::nullopt;
196 return result;
197}
198
199void ArgumentCoder<SHA1::Digest>::encode(Encoder& encoder, const SHA1::Digest& digest)
200{
201 encoder.encodeFixedLengthData(digest.data(), sizeof(digest), 1);
202}
203
204bool ArgumentCoder<SHA1::Digest>::decode(Decoder& decoder, SHA1::Digest& digest)
205{
206 return decoder.decodeFixedLengthData(digest.data(), sizeof(digest), 1);
207}
208
209} // namespace IPC
210