qset.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
- **
- ** Qt for Windows(R) Licensees
- ** As a special exception, Nokia, as the sole copyright holder for Qt
- ** Designer, grants users of the Qt/Eclipse Integration plug-in the
- ** right for the Qt/Eclipse Integration to link to functionality
- ** provided by Qt Designer and its related libraries.
- **
- ** If you are unsure which license is appropriate for your use, please
- ** contact the sales department at qt-sales@nokia.com.
- **
- ****************************************************************************/
- #ifndef QSET_H
- #define QSET_H
- #include <QtCore/qhash.h>
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- QT_MODULE(Core)
- 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; }
- 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); }
- 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 ptrdiff_t 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 ptrdiff_t 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 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 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 const_iterator insert(const T &value) // ### Qt 5: should return an 'iterator'
- { return static_cast<typename Hash::const_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 ptrdiff_t 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; }
- #if QT_VERSION < 0x050000
- // ### Qt 5: remove
- inline QSet<T> operator|(const QSet<T> &other)
- { QSet<T> result = *this; result |= other; return result; }
- inline QSet<T> operator&(const QSet<T> &other)
- { QSet<T> result = *this; result &= other; return result; }
- inline QSet<T> operator+(const QSet<T> &other)
- { QSet<T> result = *this; result += other; return result; }
- inline QSet<T> operator-(const QSet<T> &other)
- { QSet<T> result = *this; result -= other; return result; }
- #endif
- 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 <typename T>
- Q_OUTOFLINE_TEMPLATE QList<T> QSet<T>::toList() const
- {
- QList<T> result;
- 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 n != c->constEnd(); }
- 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