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132 lines
4.3 KiB
132 lines
4.3 KiB
/****************************************************************************
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**
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** Definition of QGCache and QGCacheIterator classes
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**
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** Created : 950208
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the tools module of the Qt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free Qt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.QPL
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** included in the packaging of this file. Licensees holding valid Qt
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** Commercial licenses may use this file in accordance with the Qt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#ifndef QGCACHE_H
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#define QGCACHE_H
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#ifndef QT_H
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#include "qptrcollection.h"
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#include "qglist.h"
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#include "qgdict.h"
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#endif // QT_H
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class QCList; // internal classes
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class QCListIt;
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class QCDict;
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class Q_EXPORT QGCache : public QPtrCollection // generic LRU cache
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{
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friend class QGCacheIterator;
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protected:
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enum KeyType { StringKey, AsciiKey, IntKey, PtrKey };
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// identical to QGDict's, but PtrKey is not used at the moment
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QGCache( int maxCost, uint size, KeyType kt, bool caseSensitive,
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bool copyKeys );
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QGCache( const QGCache & ); // not allowed, calls fatal()
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~QGCache();
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QGCache &operator=( const QGCache & ); // 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, QPtrCollection::Item,
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int cost, int priority );
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bool insert_other( const char *key, QPtrCollection::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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QPtrCollection::Item take_string( const QString &key );
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QPtrCollection::Item take_other( const char *key );
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QPtrCollection::Item find_string( const QString &key, bool ref=TRUE ) const;
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QPtrCollection::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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QCList *lruList;
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QCDict *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_EXPORT QGCacheIterator // generic cache iterator
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{
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protected:
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QGCacheIterator( const QGCache & );
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QGCacheIterator( const QGCacheIterator & );
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~QGCacheIterator();
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QGCacheIterator &operator=( const QGCacheIterator & );
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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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QPtrCollection::Item toFirst();
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QPtrCollection::Item toLast();
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QPtrCollection::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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QPtrCollection::Item operator()();
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QPtrCollection::Item operator++();
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QPtrCollection::Item operator+=( uint );
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QPtrCollection::Item operator--();
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QPtrCollection::Item operator-=( uint );
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protected:
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QCListIt *it; // iterator on cache list
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};
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#endif // QGCACHE_H
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