1/*
2 * Copyright (C) 2015 Igalia S.L.
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 "KeyedDecoderGlib.h"
28
29#include <wtf/text/CString.h>
30
31namespace WebCore {
32
33std::unique_ptr<KeyedDecoder> KeyedDecoder::decoder(const uint8_t* data, size_t size)
34{
35 return std::make_unique<KeyedDecoderGlib>(data, size);
36}
37
38KeyedDecoderGlib::KeyedDecoderGlib(const uint8_t* data, size_t size)
39{
40 GRefPtr<GBytes> bytes = adoptGRef(g_bytes_new(data, size));
41 GRefPtr<GVariant> variant = g_variant_new_from_bytes(G_VARIANT_TYPE("a{sv}"), bytes.get(), TRUE);
42 m_dictionaryStack.append(dictionaryFromGVariant(variant.get()));
43}
44
45KeyedDecoderGlib::~KeyedDecoderGlib()
46{
47 ASSERT(m_dictionaryStack.size() == 1);
48 ASSERT(m_arrayStack.isEmpty());
49 ASSERT(m_arrayIndexStack.isEmpty());
50}
51
52HashMap<String, GRefPtr<GVariant>> KeyedDecoderGlib::dictionaryFromGVariant(GVariant* variant)
53{
54 HashMap<String, GRefPtr<GVariant>> dictionary;
55 GVariantIter iter;
56 g_variant_iter_init(&iter, variant);
57 const char* key;
58 GVariant* value;
59 while (g_variant_iter_loop(&iter, "{&sv}", &key, &value)) {
60 if (key)
61 dictionary.set(String::fromUTF8(key), value);
62 }
63 return dictionary;
64}
65
66bool KeyedDecoderGlib::decodeBytes(const String& key, const uint8_t*& bytes, size_t& size)
67{
68 GRefPtr<GVariant> value = m_dictionaryStack.last().get(key);
69 if (!value)
70 return false;
71
72 size = g_variant_get_size(value.get());
73 bytes = static_cast<const uint8_t*>(g_variant_get_data(value.get()));
74 return true;
75}
76
77template<typename T, typename F>
78bool KeyedDecoderGlib::decodeSimpleValue(const String& key, T& result, F getFunction)
79{
80 GRefPtr<GVariant> value = m_dictionaryStack.last().get(key);
81 if (!value)
82 return false;
83
84 result = getFunction(value.get());
85 return true;
86}
87
88bool KeyedDecoderGlib::decodeBool(const String& key, bool& result)
89{
90 return decodeSimpleValue(key, result, g_variant_get_boolean);
91}
92
93bool KeyedDecoderGlib::decodeUInt32(const String& key, uint32_t& result)
94{
95 return decodeSimpleValue(key, result, g_variant_get_uint32);
96}
97
98bool KeyedDecoderGlib::decodeUInt64(const String& key, uint64_t& result)
99{
100 return decodeSimpleValue(key, result, g_variant_get_uint64);
101}
102
103bool KeyedDecoderGlib::decodeInt32(const String& key, int32_t& result)
104{
105 return decodeSimpleValue(key, result, g_variant_get_int32);
106}
107
108bool KeyedDecoderGlib::decodeInt64(const String& key, int64_t& result)
109{
110 return decodeSimpleValue(key, result, g_variant_get_int64);
111}
112
113bool KeyedDecoderGlib::decodeFloat(const String& key, float& result)
114{
115 return decodeSimpleValue(key, result, g_variant_get_double);
116}
117
118bool KeyedDecoderGlib::decodeDouble(const String& key, double& result)
119{
120 return decodeSimpleValue(key, result, g_variant_get_double);
121}
122
123bool KeyedDecoderGlib::decodeString(const String& key, String& result)
124{
125 GRefPtr<GVariant> value = m_dictionaryStack.last().get(key);
126 if (!value)
127 return false;
128
129 result = String::fromUTF8(g_variant_get_string(value.get(), nullptr));
130 return true;
131}
132
133bool KeyedDecoderGlib::beginObject(const String& key)
134{
135 GRefPtr<GVariant> value = m_dictionaryStack.last().get(key);
136 if (!value)
137 return false;
138
139 m_dictionaryStack.append(dictionaryFromGVariant(value.get()));
140 return true;
141}
142
143void KeyedDecoderGlib::endObject()
144{
145 m_dictionaryStack.removeLast();
146}
147
148bool KeyedDecoderGlib::beginArray(const String& key)
149{
150 GRefPtr<GVariant> value = m_dictionaryStack.last().get(key);
151 if (!value)
152 return false;
153
154 m_arrayStack.append(value.get());
155 m_arrayIndexStack.append(0);
156 return true;
157}
158
159bool KeyedDecoderGlib::beginArrayElement()
160{
161 if (m_arrayIndexStack.last() >= g_variant_n_children(m_arrayStack.last()))
162 return false;
163
164 GRefPtr<GVariant> variant = adoptGRef(g_variant_get_child_value(m_arrayStack.last(), m_arrayIndexStack.last()++));
165 m_dictionaryStack.append(dictionaryFromGVariant(variant.get()));
166 return true;
167}
168
169void KeyedDecoderGlib::endArrayElement()
170{
171 m_dictionaryStack.removeLast();
172}
173
174void KeyedDecoderGlib::endArray()
175{
176 m_arrayStack.removeLast();
177 m_arrayIndexStack.removeLast();
178}
179
180} // namespace WebCore
181