summaryrefslogtreecommitdiffstats
path: root/src/corelib/tools/qset.h
blob: e85c770d4254268620c119a5cce2e3ca3c9735c4 (plain)
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
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSET_H
#define QSET_H

#include <QtCore/qhash.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


template <class T>
class QSet
{
    typedef QHash<T, QHashDummyValue> Hash;

public:
    inline QSet() {}
    inline QSet(const QSet<T> &other) : q_hash(other.q_hash) {}

    inline QSet<T> &operator=(const QSet<T> &other)
        { q_hash = other.q_hash; return *this; }
#ifdef Q_COMPILER_RVALUE_REFS
    inline QSet<T> &operator=(QSet<T> &&other)
        { qSwap(q_hash, other.q_hash); return *this; }
#endif
    inline void swap(QSet<T> &other) { q_hash.swap(other.q_hash); }

    inline bool operator==(const QSet<T> &other) const
        { return q_hash == other.q_hash; }
    inline bool operator!=(const QSet<T> &other) const
        { return q_hash != other.q_hash; }

    inline int size() const { return q_hash.size(); }

    inline bool isEmpty() const { return q_hash.isEmpty(); }

    inline int capacity() const { return q_hash.capacity(); }
    inline void reserve(int size);
    inline void squeeze() { q_hash.squeeze(); }

    inline void detach() { q_hash.detach(); }
    inline bool isDetached() const { return q_hash.isDetached(); }
    inline void setSharable(bool sharable) { q_hash.setSharable(sharable); }

    inline void clear() { q_hash.clear(); }

    inline bool remove(const T &value) { return q_hash.remove(value) != 0; }

    inline bool contains(const T &value) const { return q_hash.contains(value); }

    bool contains(const QSet<T> &set) const;

    class const_iterator;

    class iterator
    {
        typedef QHash<T, QHashDummyValue> Hash;
        typename Hash::iterator i;
        friend class const_iterator;

    public:
        typedef std::bidirectional_iterator_tag iterator_category;
        typedef qptrdiff difference_type;
        typedef T value_type;
        typedef const T *pointer;
        typedef const T &reference;

        inline iterator() {}
        inline iterator(typename Hash::iterator o) : i(o) {}
        inline iterator(const iterator &o) : i(o.i) {}
        inline iterator &operator=(const iterator &o) { i = o.i; return *this; }
        inline const T &operator*() const { return i.key(); }
        inline const T *operator->() const { return &i.key(); }
        inline bool operator==(const iterator &o) const { return i == o.i; }
        inline bool operator!=(const iterator &o) const { return i != o.i; }
        inline bool operator==(const const_iterator &o) const
            { return i == o.i; }
        inline bool operator!=(const const_iterator &o) const
            { return i != o.i; }
        inline iterator &operator++() { ++i; return *this; }
        inline iterator operator++(int) { iterator r = *this; ++i; return r; }
        inline iterator &operator--() { --i; return *this; }
        inline iterator operator--(int) { iterator r = *this; --i; return r; }
        inline iterator operator+(int j) const { return i + j; }
        inline iterator operator-(int j) const { return i - j; }
        inline iterator &operator+=(int j) { i += j; return *this; }
        inline iterator &operator-=(int j) { i -= j; return *this; }
    };

    class const_iterator
    {
        typedef QHash<T, QHashDummyValue> Hash;
        typename Hash::const_iterator i;
        friend class iterator;

    public:
        typedef std::bidirectional_iterator_tag iterator_category;
        typedef qptrdiff difference_type;
        typedef T value_type;
        typedef const T *pointer;
        typedef const T &reference;

        inline const_iterator() {}
        inline const_iterator(typename Hash::const_iterator o) : i(o) {}
        inline const_iterator(const const_iterator &o) : i(o.i) {}
        inline const_iterator(const iterator &o)
            : i(o.i) {}
        inline const_iterator &operator=(const const_iterator &o) { i = o.i; return *this; }
        inline const T &operator*() const { return i.key(); }
        inline const T *operator->() const { return &i.key(); }
        inline bool operator==(const const_iterator &o) const { return i == o.i; }
        inline bool operator!=(const const_iterator &o) const { return i != o.i; }
        inline const_iterator &operator++() { ++i; return *this; }
        inline const_iterator operator++(int) { const_iterator r = *this; ++i; return r; }
        inline const_iterator &operator--() { --i; return *this; }
        inline const_iterator operator--(int) { const_iterator r = *this; --i; return r; }
        inline const_iterator operator+(int j) const { return i + j; }
        inline const_iterator operator-(int j) const { return i - j; }
        inline const_iterator &operator+=(int j) { i += j; return *this; }
        inline const_iterator &operator-=(int j) { i -= j; return *this; }
    };

    // STL style
    inline iterator begin() { return q_hash.begin(); }
    inline const_iterator begin() const { return q_hash.begin(); }
    inline const_iterator cbegin() const { return q_hash.begin(); }
    inline const_iterator constBegin() const { return q_hash.constBegin(); }
    inline iterator end() { return q_hash.end(); }
    inline const_iterator end() const { return q_hash.end(); }
    inline const_iterator cend() const { return q_hash.end(); }
    inline const_iterator constEnd() const { return q_hash.constEnd(); }
    iterator erase(iterator i)
        { return q_hash.erase(reinterpret_cast<typename Hash::iterator &>(i)); }

    // more Qt
    typedef iterator Iterator;
    typedef const_iterator ConstIterator;
    inline int count() const { return q_hash.count(); }
    inline iterator insert(const T &value)
        { return static_cast<typename Hash::iterator>(q_hash.insert(value, QHashDummyValue())); }
    iterator find(const T &value) { return q_hash.find(value); }
    const_iterator find(const T &value) const { return q_hash.find(value); }
    inline const_iterator constFind(const T &value) const { return find(value); }
    QSet<T> &unite(const QSet<T> &other);
    QSet<T> &intersect(const QSet<T> &other);
    QSet<T> &subtract(const QSet<T> &other);

    // STL compatibility
    typedef T key_type;
    typedef T value_type;
    typedef value_type *pointer;
    typedef const value_type *const_pointer;
    typedef value_type &reference;
    typedef const value_type &const_reference;
    typedef qptrdiff difference_type;
    typedef int size_type;

    inline bool empty() const { return isEmpty(); }
    // comfort
    inline QSet<T> &operator<<(const T &value) { insert(value); return *this; }
    inline QSet<T> &operator|=(const QSet<T> &other) { unite(other); return *this; }
    inline QSet<T> &operator|=(const T &value) { insert(value); return *this; }
    inline QSet<T> &operator&=(const QSet<T> &other) { intersect(other); return *this; }
    inline QSet<T> &operator&=(const T &value)
        { QSet<T> result; if (contains(value)) result.insert(value); return (*this = result); }
    inline QSet<T> &operator+=(const QSet<T> &other) { unite(other); return *this; }
    inline QSet<T> &operator+=(const T &value) { insert(value); return *this; }
    inline QSet<T> &operator-=(const QSet<T> &other) { subtract(other); return *this; }
    inline QSet<T> &operator-=(const T &value) { remove(value); return *this; }
    inline QSet<T> operator|(const QSet<T> &other) const
        { QSet<T> result = *this; result |= other; return result; }
    inline QSet<T> operator&(const QSet<T> &other) const
        { QSet<T> result = *this; result &= other; return result; }
    inline QSet<T> operator+(const QSet<T> &other) const
        { QSet<T> result = *this; result += other; return result; }
    inline QSet<T> operator-(const QSet<T> &other) const
        { QSet<T> result = *this; result -= other; return result; }

    QList<T> toList() const;
    inline QList<T> values() const { return toList(); }

    static QSet<T> fromList(const QList<T> &list);

private:
    Hash q_hash;
};

template <class T>
Q_INLINE_TEMPLATE void QSet<T>::reserve(int asize) { q_hash.reserve(asize); }

template <class T>
Q_INLINE_TEMPLATE QSet<T> &QSet<T>::unite(const QSet<T> &other)
{
    QSet<T> copy(other);
    typename QSet<T>::const_iterator i = copy.constEnd();
    while (i != copy.constBegin()) {
        --i;
        insert(*i);
    }
    return *this;
}

template <class T>
Q_INLINE_TEMPLATE QSet<T> &QSet<T>::intersect(const QSet<T> &other)
{
    QSet<T> copy1(*this);
    QSet<T> copy2(other);
    typename QSet<T>::const_iterator i = copy1.constEnd();
    while (i != copy1.constBegin()) {
        --i;
        if (!copy2.contains(*i))
            remove(*i);
    }
    return *this;
}

template <class T>
Q_INLINE_TEMPLATE QSet<T> &QSet<T>::subtract(const QSet<T> &other)
{
    QSet<T> copy1(*this);
    QSet<T> copy2(other);
    typename QSet<T>::const_iterator i = copy1.constEnd();
    while (i != copy1.constBegin()) {
        --i;
        if (copy2.contains(*i))
            remove(*i);
    }
    return *this;
}

template <class T>
Q_INLINE_TEMPLATE bool QSet<T>::contains(const QSet<T> &other) const
{
    typename QSet<T>::const_iterator i = other.constBegin();
    while (i != other.constEnd()) {
        if (!contains(*i))
            return false;
        ++i;
    }
    return true;
}

template <typename T>
Q_OUTOFLINE_TEMPLATE QList<T> QSet<T>::toList() const
{
    QList<T> result;
    result.reserve(size());
    typename QSet<T>::const_iterator i = constBegin();
    while (i != constEnd()) {
        result.append(*i);
        ++i;
    }
    return result;
}

template <typename T>
Q_OUTOFLINE_TEMPLATE QSet<T> QList<T>::toSet() const
{
    QSet<T> result;
    result.reserve(size());
    for (int i = 0; i < size(); ++i)
        result.insert(at(i));
    return result;
}

template <typename T>
QSet<T> QSet<T>::fromList(const QList<T> &list)
{
    return list.toSet();
}

template <typename T>
QList<T> QList<T>::fromSet(const QSet<T> &set)
{
    return set.toList();
}

Q_DECLARE_SEQUENTIAL_ITERATOR(Set)

template <typename T>
class QMutableSetIterator
{
    typedef typename QSet<T>::iterator iterator;
    QSet<T> *c;
    iterator i, n;
    inline bool item_exists() const { return c->constEnd() != n; }

public:
    inline QMutableSetIterator(QSet<T> &container)
        : c(&container)
    { c->setSharable(false); i = c->begin(); n = c->end(); }
    inline ~QMutableSetIterator()
    { c->setSharable(true); }
    inline QMutableSetIterator &operator=(QSet<T> &container)
    { c->setSharable(true); c = &container; c->setSharable(false);
      i = c->begin(); n = c->end(); return *this; }
    inline void toFront() { i = c->begin(); n = c->end(); }
    inline void toBack() { i = c->end(); n = i; }
    inline bool hasNext() const { return c->constEnd() != i; }
    inline const T &next() { n = i++; return *n; }
    inline const T &peekNext() const { return *i; }
    inline bool hasPrevious() const { return c->constBegin() != i; }
    inline const T &previous() { n = --i; return *n; }
    inline const T &peekPrevious() const { iterator p = i; return *--p; }
    inline void remove()
    { if (c->constEnd() != n) { i = c->erase(n); n = c->end(); } }
    inline const T &value() const { Q_ASSERT(item_exists()); return *n; }
    inline bool findNext(const T &t)
    { while (c->constEnd() != (n = i)) if (*i++ == t) return true; return false; }
    inline bool findPrevious(const T &t)
    { while (c->constBegin() != i) if (*(n = --i) == t) return true;
      n = c->end(); return false;  }
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSET_H