1 | /* |
2 | * Copyright (C) 2007 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 COMPUTER, INC. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #ifndef WTF_HashIterators_h |
27 | #define WTF_HashIterators_h |
28 | |
29 | namespace WTF { |
30 | |
31 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator; |
32 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator; |
33 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator; |
34 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator; |
35 | |
36 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > { |
37 | private: |
38 | typedef std::pair<KeyType, MappedType> ValueType; |
39 | public: |
40 | typedef HashTableConstKeysIterator<HashTableType, KeyType, MappedType> Keys; |
41 | typedef HashTableConstValuesIterator<HashTableType, KeyType, MappedType> Values; |
42 | |
43 | HashTableConstIteratorAdapter(const typename HashTableType::const_iterator& impl) : m_impl(impl) {} |
44 | |
45 | const ValueType* get() const { return (const ValueType*)m_impl.get(); } |
46 | const ValueType& operator*() const { return *get(); } |
47 | const ValueType* operator->() const { return get(); } |
48 | |
49 | HashTableConstIteratorAdapter& operator++() { ++m_impl; return *this; } |
50 | // postfix ++ intentionally omitted |
51 | |
52 | Keys keys() { return Keys(*this); } |
53 | Values values() { return Values(*this); } |
54 | |
55 | typename HashTableType::const_iterator m_impl; |
56 | }; |
57 | |
58 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > { |
59 | private: |
60 | typedef std::pair<KeyType, MappedType> ValueType; |
61 | public: |
62 | typedef HashTableKeysIterator<HashTableType, KeyType, MappedType> Keys; |
63 | typedef HashTableValuesIterator<HashTableType, KeyType, MappedType> Values; |
64 | |
65 | HashTableIteratorAdapter(const typename HashTableType::iterator& impl) : m_impl(impl) {} |
66 | |
67 | ValueType* get() const { return (ValueType*)m_impl.get(); } |
68 | ValueType& operator*() const { return *get(); } |
69 | ValueType* operator->() const { return get(); } |
70 | |
71 | HashTableIteratorAdapter& operator++() { ++m_impl; return *this; } |
72 | // postfix ++ intentionally omitted |
73 | |
74 | operator HashTableConstIteratorAdapter<HashTableType, ValueType>() { |
75 | typename HashTableType::const_iterator i = m_impl; |
76 | return i; |
77 | } |
78 | |
79 | Keys keys() { return Keys(*this); } |
80 | Values values() { return Values(*this); } |
81 | |
82 | typename HashTableType::iterator m_impl; |
83 | }; |
84 | |
85 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstKeysIterator { |
86 | private: |
87 | typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator; |
88 | |
89 | public: |
90 | HashTableConstKeysIterator(const ConstIterator& impl) : m_impl(impl) {} |
91 | |
92 | const KeyType* get() const { return &(m_impl.get()->first); } |
93 | const KeyType& operator*() const { return *get(); } |
94 | const KeyType* operator->() const { return get(); } |
95 | |
96 | HashTableConstKeysIterator& operator++() { ++m_impl; return *this; } |
97 | // postfix ++ intentionally omitted |
98 | |
99 | ConstIterator m_impl; |
100 | }; |
101 | |
102 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableConstValuesIterator { |
103 | private: |
104 | typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator; |
105 | |
106 | public: |
107 | HashTableConstValuesIterator(const ConstIterator& impl) : m_impl(impl) {} |
108 | |
109 | const MappedType* get() const { return &(m_impl.get()->second); } |
110 | const MappedType& operator*() const { return *get(); } |
111 | const MappedType* operator->() const { return get(); } |
112 | |
113 | HashTableConstValuesIterator& operator++() { ++m_impl; return *this; } |
114 | // postfix ++ intentionally omitted |
115 | |
116 | ConstIterator m_impl; |
117 | }; |
118 | |
119 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableKeysIterator { |
120 | private: |
121 | typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator; |
122 | typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator; |
123 | |
124 | public: |
125 | HashTableKeysIterator(const Iterator& impl) : m_impl(impl) {} |
126 | |
127 | KeyType* get() const { return &(m_impl.get()->first); } |
128 | KeyType& operator*() const { return *get(); } |
129 | KeyType* operator->() const { return get(); } |
130 | |
131 | HashTableKeysIterator& operator++() { ++m_impl; return *this; } |
132 | // postfix ++ intentionally omitted |
133 | |
134 | operator HashTableConstKeysIterator<HashTableType, KeyType, MappedType>() { |
135 | ConstIterator i = m_impl; |
136 | return i; |
137 | } |
138 | |
139 | Iterator m_impl; |
140 | }; |
141 | |
142 | template<typename HashTableType, typename KeyType, typename MappedType> struct HashTableValuesIterator { |
143 | private: |
144 | typedef HashTableIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > Iterator; |
145 | typedef HashTableConstIteratorAdapter<HashTableType, std::pair<KeyType, MappedType> > ConstIterator; |
146 | |
147 | public: |
148 | HashTableValuesIterator(const Iterator& impl) : m_impl(impl) {} |
149 | |
150 | MappedType* get() const { return &(m_impl.get()->second); } |
151 | MappedType& operator*() const { return *get(); } |
152 | MappedType* operator->() const { return get(); } |
153 | |
154 | HashTableValuesIterator& operator++() { ++m_impl; return *this; } |
155 | // postfix ++ intentionally omitted |
156 | |
157 | operator HashTableConstValuesIterator<HashTableType, KeyType, MappedType>() { |
158 | ConstIterator i = m_impl; |
159 | return i; |
160 | } |
161 | |
162 | Iterator m_impl; |
163 | }; |
164 | |
165 | template<typename T, typename U, typename V> |
166 | inline bool operator==(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b) |
167 | { |
168 | return a.m_impl == b.m_impl; |
169 | } |
170 | |
171 | template<typename T, typename U, typename V> |
172 | inline bool operator!=(const HashTableConstKeysIterator<T, U, V>& a, const HashTableConstKeysIterator<T, U, V>& b) |
173 | { |
174 | return a.m_impl != b.m_impl; |
175 | } |
176 | |
177 | template<typename T, typename U, typename V> |
178 | inline bool operator==(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b) |
179 | { |
180 | return a.m_impl == b.m_impl; |
181 | } |
182 | |
183 | template<typename T, typename U, typename V> |
184 | inline bool operator!=(const HashTableConstValuesIterator<T, U, V>& a, const HashTableConstValuesIterator<T, U, V>& b) |
185 | { |
186 | return a.m_impl != b.m_impl; |
187 | } |
188 | |
189 | template<typename T, typename U, typename V> |
190 | inline bool operator==(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b) |
191 | { |
192 | return a.m_impl == b.m_impl; |
193 | } |
194 | |
195 | template<typename T, typename U, typename V> |
196 | inline bool operator!=(const HashTableKeysIterator<T, U, V>& a, const HashTableKeysIterator<T, U, V>& b) |
197 | { |
198 | return a.m_impl != b.m_impl; |
199 | } |
200 | |
201 | template<typename T, typename U, typename V> |
202 | inline bool operator==(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b) |
203 | { |
204 | return a.m_impl == b.m_impl; |
205 | } |
206 | |
207 | template<typename T, typename U, typename V> |
208 | inline bool operator!=(const HashTableValuesIterator<T, U, V>& a, const HashTableValuesIterator<T, U, V>& b) |
209 | { |
210 | return a.m_impl != b.m_impl; |
211 | } |
212 | |
213 | |
214 | } // namespace WTF |
215 | |
216 | #endif // WTF_HashIterators_h |
217 | |