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138 lines
4.5 KiB
138 lines
4.5 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt3Support module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef Q3GCACHE_H
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#define Q3GCACHE_H
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#include <Qt3Support/q3ptrcollection.h>
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#include <Qt3Support/q3glist.h>
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#include <Qt3Support/q3gdict.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Qt3SupportLight)
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class Q3CList; // internal classes
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class Q3CListIt;
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class Q3CDict;
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class Q_COMPAT_EXPORT Q3GCache : public Q3PtrCollection // generic LRU cache
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{
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friend class Q3GCacheIterator;
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protected:
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enum KeyType { StringKey, AsciiKey, IntKey, PtrKey };
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// identical to Q3GDict's, but PtrKey is not used at the moment
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Q3GCache(int maxCost, uint size, KeyType kt, bool caseSensitive,
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bool copyKeys);
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Q3GCache(const Q3GCache &); // not allowed, calls fatal()
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~Q3GCache();
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Q3GCache &operator=(const Q3GCache &); // not allowed, calls fatal()
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uint count() const;
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uint size() const;
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int maxCost() const { return mCost; }
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int totalCost() const { return tCost; }
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void setMaxCost(int maxCost);
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void clear();
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bool insert_string(const QString &key, Q3PtrCollection::Item,
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int cost, int priority);
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bool insert_other(const char *key, Q3PtrCollection::Item,
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int cost, int priority);
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bool remove_string(const QString &key);
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bool remove_other(const char *key);
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Q3PtrCollection::Item take_string(const QString &key);
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Q3PtrCollection::Item take_other(const char *key);
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Q3PtrCollection::Item find_string(const QString &key, bool ref=true) const;
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Q3PtrCollection::Item find_other(const char *key, bool ref=true) const;
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void statistics() const;
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private:
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bool makeRoomFor(int cost, int priority = -1);
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KeyType keytype;
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Q3CList *lruList;
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Q3CDict *dict;
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int mCost;
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int tCost;
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bool copyk;
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};
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class Q_COMPAT_EXPORT Q3GCacheIterator // generic cache iterator
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{
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protected:
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Q3GCacheIterator(const Q3GCache &);
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Q3GCacheIterator(const Q3GCacheIterator &);
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~Q3GCacheIterator();
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Q3GCacheIterator &operator=(const Q3GCacheIterator &);
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uint count() const;
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bool atFirst() const;
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bool atLast() const;
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Q3PtrCollection::Item toFirst();
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Q3PtrCollection::Item toLast();
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Q3PtrCollection::Item get() const;
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QString getKeyString() const;
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const char *getKeyAscii() const;
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long getKeyInt() const;
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Q3PtrCollection::Item operator()();
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Q3PtrCollection::Item operator++();
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Q3PtrCollection::Item operator+=(uint);
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Q3PtrCollection::Item operator--();
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Q3PtrCollection::Item operator-=(uint);
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protected:
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Q3CListIt *it; // iterator on cache list
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // Q3GCACHE_H
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