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132 lines
4.3 KiB
132 lines
4.3 KiB
13 years ago
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/****************************************************************************
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**
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** Definition of TQGCache and TQGCacheIterator 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 TQt 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 TQt 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.TQPL
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** included in the packaging of this file. Licensees holding valid TQt
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** Commercial licenses may use this file in accordance with the TQt
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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 TQGCACHE_H
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#define TQGCACHE_H
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#ifndef QT_H
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#include "ntqptrcollection.h"
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#include "ntqglist.h"
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#include "ntqgdict.h"
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#endif // QT_H
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class TQCList; // internal classes
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class TQCListIt;
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class TQCDict;
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class Q_EXPORT TQGCache : public TQPtrCollection // generic LRU cache
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{
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friend class TQGCacheIterator;
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protected:
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enum KeyType { StringKey, AsciiKey, IntKey, PtrKey };
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// identical to TQGDict's, but PtrKey is not used at the moment
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TQGCache( int maxCost, uint size, KeyType kt, bool caseSensitive,
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bool copyKeys );
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TQGCache( const TQGCache & ); // not allowed, calls fatal()
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~TQGCache();
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TQGCache &operator=( const TQGCache & ); // 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 TQString &key, TQPtrCollection::Item,
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int cost, int priority );
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bool insert_other( const char *key, TQPtrCollection::Item,
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int cost, int priority );
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bool remove_string( const TQString &key );
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bool remove_other( const char *key );
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TQPtrCollection::Item take_string( const TQString &key );
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TQPtrCollection::Item take_other( const char *key );
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TQPtrCollection::Item find_string( const TQString &key, bool ref=TRUE ) const;
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TQPtrCollection::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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TQCList *lruList;
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TQCDict *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 TQGCacheIterator // generic cache iterator
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{
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protected:
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TQGCacheIterator( const TQGCache & );
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TQGCacheIterator( const TQGCacheIterator & );
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~TQGCacheIterator();
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TQGCacheIterator &operator=( const TQGCacheIterator & );
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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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TQPtrCollection::Item toFirst();
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TQPtrCollection::Item toLast();
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TQPtrCollection::Item get() const;
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TQString getKeyString() const;
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const char *getKeyAscii() const;
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long getKeyInt() const;
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TQPtrCollection::Item operator()();
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TQPtrCollection::Item operator++();
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TQPtrCollection::Item operator+=( uint );
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TQPtrCollection::Item operator--();
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TQPtrCollection::Item operator-=( uint );
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protected:
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TQCListIt *it; // iterator on cache list
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};
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#endif // TQGCACHE_H
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