qiterator.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
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- ** 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:
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- ** 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.
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- ****************************************************************************/
- #ifndef QITERATOR_H
- #define QITERATOR_H
- #include <QtCore/qglobal.h>
- QT_BEGIN_HEADER
- namespace std {
- struct bidirectional_iterator_tag;
- struct random_access_iterator_tag;
- }
- QT_BEGIN_NAMESPACE
- QT_MODULE(Core)
- #define Q_DECLARE_SEQUENTIAL_ITERATOR(C)
- template <class T>
- class Q##C##Iterator
- {
- typedef typename Q##C<T>::const_iterator const_iterator;
- Q##C<T> c;
- const_iterator i;
- public:
- inline Q##C##Iterator(const Q##C<T> &container)
- : c(container), i(c.constBegin()) {}
- inline Q##C##Iterator &operator=(const Q##C<T> &container)
- { c = container; i = c.constBegin(); return *this; }
- inline void toFront() { i = c.constBegin(); }
- inline void toBack() { i = c.constEnd(); }
- inline bool hasNext() const { return i != c.constEnd(); }
- inline const T &next() { return *i++; }
- inline const T &peekNext() const { return *i; }
- inline bool hasPrevious() const { return i != c.constBegin(); }
- inline const T &previous() { return *--i; }
- inline const T &peekPrevious() const { const_iterator p = i; return *--p; }
- inline bool findNext(const T &t)
- { while (i != c.constEnd()) if (*i++ == t) return true; return false; }
- inline bool findPrevious(const T &t)
- { while (i != c.constBegin()) if (*(--i) == t) return true;
- return false; }
- };
- #define Q_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR(C)
- template <class T>
- class QMutable##C##Iterator
- {
- typedef typename Q##C<T>::iterator iterator;
- typedef typename Q##C<T>::const_iterator const_iterator;
- Q##C<T> *c;
- iterator i, n;
- inline bool item_exists() const { return const_iterator(n) != c->constEnd(); }
- public:
- inline QMutable##C##Iterator(Q##C<T> &container)
- : c(&container)
- { c->setSharable(false); i = c->begin(); n = c->end(); }
- inline ~QMutable##C##Iterator()
- { c->setSharable(true); }
- inline QMutable##C##Iterator &operator=(Q##C<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() != const_iterator(i); }
- inline T &next() { n = i++; return *n; }
- inline T &peekNext() const { return *i; }
- inline bool hasPrevious() const { return c->constBegin() != const_iterator(i); }
- inline T &previous() { n = --i; return *n; }
- inline T &peekPrevious() const { iterator p = i; return *--p; }
- inline void remove()
- { if (c->constEnd() != const_iterator(n)) { i = c->erase(n); n = c->end(); } }
- inline void setValue(const T &t) const { if (c->constEnd() != const_iterator(n)) *n = t; }
- inline T &value() { Q_ASSERT(item_exists()); return *n; }
- inline const T &value() const { Q_ASSERT(item_exists()); return *n; }
- inline void insert(const T &t) { n = i = c->insert(i, t); ++i; }
- inline bool findNext(const T &t)
- { while (c->constEnd() != const_iterator(n = i)) if (*i++ == t) return true; return false; }
- inline bool findPrevious(const T &t)
- { while (c->constBegin() != const_iterator(i)) if (*(n = --i) == t) return true;
- n = c->end(); return false; }
- };
- #define Q_DECLARE_ASSOCIATIVE_ITERATOR(C)
- template <class Key, class T>
- class Q##C##Iterator
- {
- typedef typename Q##C<Key,T>::const_iterator const_iterator;
- typedef const_iterator Item;
- Q##C<Key,T> c;
- const_iterator i, n;
- inline bool item_exists() const { return n != c.constEnd(); }
- public:
- inline Q##C##Iterator(const Q##C<Key,T> &container)
- : c(container), i(c.constBegin()), n(c.constEnd()) {}
- inline Q##C##Iterator &operator=(const Q##C<Key,T> &container)
- { c = container; i = c.constBegin(); n = c.constEnd(); return *this; }
- inline void toFront() { i = c.constBegin(); n = c.constEnd(); }
- inline void toBack() { i = c.constEnd(); n = c.constEnd(); }
- inline bool hasNext() const { return i != c.constEnd(); }
- inline Item next() { n = i++; return n; }
- inline Item peekNext() const { return i; }
- inline bool hasPrevious() const { return i != c.constBegin(); }
- inline Item previous() { n = --i; return n; }
- inline Item peekPrevious() const { const_iterator p = i; return --p; }
- inline const T &value() const { Q_ASSERT(item_exists()); return *n; }
- inline const Key &key() const { Q_ASSERT(item_exists()); return n.key(); }
- inline bool findNext(const T &t)
- { while ((n = i) != c.constEnd()) if (*i++ == t) return true; return false; }
- inline bool findPrevious(const T &t)
- { while (i != c.constBegin()) if (*(n = --i) == t) return true;
- n = c.constEnd(); return false; }
- };
- #define Q_DECLARE_MUTABLE_ASSOCIATIVE_ITERATOR(C)
- template <class Key, class T>
- class QMutable##C##Iterator
- {
- typedef typename Q##C<Key,T>::iterator iterator;
- typedef typename Q##C<Key,T>::const_iterator const_iterator;
- typedef iterator Item;
- Q##C<Key,T> *c;
- iterator i, n;
- inline bool item_exists() const { return const_iterator(n) != c->constEnd(); }
- public:
- inline QMutable##C##Iterator(Q##C<Key,T> &container)
- : c(&container)
- { c->setSharable(false); i = c->begin(); n = c->end(); }
- inline ~QMutable##C##Iterator()
- { c->setSharable(true); }
- inline QMutable##C##Iterator &operator=(Q##C<Key,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 = c->end(); }
- inline bool hasNext() const { return const_iterator(i) != c->constEnd(); }
- inline Item next() { n = i++; return n; }
- inline Item peekNext() const { return i; }
- inline bool hasPrevious() const { return const_iterator(i) != c->constBegin(); }
- inline Item previous() { n = --i; return n; }
- inline Item peekPrevious() const { iterator p = i; return --p; }
- inline void remove()
- { if (const_iterator(n) != c->constEnd()) { i = c->erase(n); n = c->end(); } }
- inline void setValue(const T &t) { if (const_iterator(n) != c->constEnd()) *n = t; }
- inline T &value() { Q_ASSERT(item_exists()); return *n; }
- inline const T &value() const { Q_ASSERT(item_exists()); return *n; }
- inline const Key &key() const { Q_ASSERT(item_exists()); return n.key(); }
- inline bool findNext(const T &t)
- { while (const_iterator(n = i) != c->constEnd()) if (*i++ == t) return true; return false; }
- inline bool findPrevious(const T &t)
- { while (const_iterator(i) != c->constBegin()) if (*(n = --i) == t) return true;
- n = c->end(); return false; }
- };
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QITERATOR_H