/****************************************************************************+
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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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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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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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** 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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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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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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+
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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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+
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QT_BEGIN_HEADER+
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+
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QT_BEGIN_NAMESPACE+
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+
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QT_MODULE(Qt3SupportLight)+
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+
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class Q3CList;					// internal classes+
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class Q3CListIt;+
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class Q3CDict;+
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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    void    statistics() const;+
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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protected:+
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    Q3CListIt *it;				// iterator on cache list+
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};+
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+
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QT_END_NAMESPACE+
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+
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QT_END_HEADER+
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+
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#endif // Q3GCACHE_H+
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