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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef WTF_HashCountedSet_h
#define WTF_HashCountedSet_h
#include <wtf/Assertions.h>
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WTF {
template<typename Value, typename HashFunctions = typename DefaultHash<Value>::Hash,
typename Traits = HashTraits<Value> > class HashCountedSet {
WTF_MAKE_FAST_ALLOCATED;
private:
typedef HashMap<Value, unsigned, HashFunctions, Traits> ImplType;
public:
typedef Value ValueType;
typedef typename ImplType::iterator iterator;
typedef typename ImplType::const_iterator const_iterator;
typedef typename ImplType::AddResult AddResult;
HashCountedSet() {}
void swap(HashCountedSet&);
int size() const;
int capacity() const;
bool isEmpty() const;
// Iterators iterate over pairs of values and counts.
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
iterator find(const ValueType&);
const_iterator find(const ValueType&) const;
bool contains(const ValueType&) const;
unsigned count(const ValueType&) const;
// Increases the count if an equal value is already present
// the return value is a pair of an interator to the new value's
// location, and a bool that is true if an new entry was added.
AddResult add(const ValueType&);
// Reduces the count of the value, and removes it if count
// goes down to zero, returns true if the value is removed.
bool remove(const ValueType&);
bool remove(iterator);
// Removes the value, regardless of its count.
void removeAll(iterator);
void removeAll(const ValueType&);
// Clears the whole set.
void clear();
private:
ImplType m_impl;
};
template<typename Value, typename HashFunctions, typename Traits>
inline void HashCountedSet<Value, HashFunctions, Traits>::swap(HashCountedSet& other)
{
m_impl.swap(other.m_impl);
}
template<typename Value, typename HashFunctions, typename Traits>
inline int HashCountedSet<Value, HashFunctions, Traits>::size() const
{
return m_impl.size();
}
template<typename Value, typename HashFunctions, typename Traits>
inline int HashCountedSet<Value, HashFunctions, Traits>::capacity() const
{
return m_impl.capacity();
}
template<typename Value, typename HashFunctions, typename Traits>
inline bool HashCountedSet<Value, HashFunctions, Traits>::isEmpty() const
{
return size() == 0;
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::begin()
{
return m_impl.begin();
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::end()
{
return m_impl.end();
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::begin() const
{
return m_impl.begin();
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::end() const
{
return m_impl.end();
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::find(const ValueType& value)
{
return m_impl.find(value);
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::find(const ValueType& value) const
{
return m_impl.find(value);
}
template<typename Value, typename HashFunctions, typename Traits>
inline bool HashCountedSet<Value, HashFunctions, Traits>::contains(const ValueType& value) const
{
return m_impl.contains(value);
}
template<typename Value, typename HashFunctions, typename Traits>
inline unsigned HashCountedSet<Value, HashFunctions, Traits>::count(const ValueType& value) const
{
return m_impl.get(value);
}
template<typename Value, typename HashFunctions, typename Traits>
inline typename HashCountedSet<Value, HashFunctions, Traits>::AddResult HashCountedSet<Value, HashFunctions, Traits>::add(const ValueType &value)
{
AddResult result = m_impl.add(value, 0);
++result.iterator->value;
return result;
}
template<typename Value, typename HashFunctions, typename Traits>
inline bool HashCountedSet<Value, HashFunctions, Traits>::remove(const ValueType& value)
{
return remove(find(value));
}
template<typename Value, typename HashFunctions, typename Traits>
inline bool HashCountedSet<Value, HashFunctions, Traits>::remove(iterator it)
{
if (it == end())
return false;
unsigned oldVal = it->value;
ASSERT(oldVal);
unsigned newVal = oldVal - 1;
if (newVal) {
it->value = newVal;
return false;
}
m_impl.remove(it);
return true;
}
template<typename Value, typename HashFunctions, typename Traits>
inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(const ValueType& value)
{
removeAll(find(value));
}
template<typename Value, typename HashFunctions, typename Traits>
inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(iterator it)
{
if (it == end())
return;
m_impl.remove(it);
}
template<typename Value, typename HashFunctions, typename Traits>
inline void HashCountedSet<Value, HashFunctions, Traits>::clear()
{
m_impl.clear();
}
template<typename Value, typename HashFunctions, typename Traits, typename VectorType>
inline void copyToVector(const HashCountedSet<Value, HashFunctions, Traits>& collection, VectorType& vector)
{
typedef typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator iterator;
vector.resize(collection.size());
iterator it = collection.begin();
iterator end = collection.end();
for (unsigned i = 0; it != end; ++it, ++i)
vector[i] = *it;
}
template<typename Value, typename HashFunctions, typename Traits>
inline void copyToVector(const HashCountedSet<Value, HashFunctions, Traits>& collection, Vector<Value>& vector)
{
typedef typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator iterator;
vector.resize(collection.size());
iterator it = collection.begin();
iterator end = collection.end();
for (unsigned i = 0; it != end; ++it, ++i)
vector[i] = (*it).key;
}
} // namespace khtml
using WTF::HashCountedSet;
#endif /* WTF_HashCountedSet_h */
|
