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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 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 the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef Q3GCACHE_H
#define Q3GCACHE_H
#include <Qt3Support/q3ptrcollection.h>
#include <Qt3Support/q3glist.h>
#include <Qt3Support/q3gdict.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Qt3SupportLight)
class Q3CList; // internal classes
class Q3CListIt;
class Q3CDict;
class Q_COMPAT_EXPORT Q3GCache : public Q3PtrCollection // generic LRU cache
{
friend class Q3GCacheIterator;
protected:
enum KeyType { StringKey, AsciiKey, IntKey, PtrKey };
// identical to Q3GDict's, but PtrKey is not used at the moment
Q3GCache(int maxCost, uint size, KeyType kt, bool caseSensitive,
bool copyKeys);
Q3GCache(const Q3GCache &); // not allowed, calls fatal()
~Q3GCache();
Q3GCache &operator=(const Q3GCache &); // not allowed, calls fatal()
uint count() const;
uint size() const;
int maxCost() const { return mCost; }
int totalCost() const { return tCost; }
void setMaxCost(int maxCost);
void clear();
bool insert_string(const QString &key, Q3PtrCollection::Item,
int cost, int priority);
bool insert_other(const char *key, Q3PtrCollection::Item,
int cost, int priority);
bool remove_string(const QString &key);
bool remove_other(const char *key);
Q3PtrCollection::Item take_string(const QString &key);
Q3PtrCollection::Item take_other(const char *key);
Q3PtrCollection::Item find_string(const QString &key, bool ref=true) const;
Q3PtrCollection::Item find_other(const char *key, bool ref=true) const;
void statistics() const;
private:
bool makeRoomFor(int cost, int priority = -1);
KeyType keytype;
Q3CList *lruList;
Q3CDict *dict;
int mCost;
int tCost;
bool copyk;
};
class Q_COMPAT_EXPORT Q3GCacheIterator // generic cache iterator
{
protected:
Q3GCacheIterator(const Q3GCache &);
Q3GCacheIterator(const Q3GCacheIterator &);
~Q3GCacheIterator();
Q3GCacheIterator &operator=(const Q3GCacheIterator &);
uint count() const;
bool atFirst() const;
bool atLast() const;
Q3PtrCollection::Item toFirst();
Q3PtrCollection::Item toLast();
Q3PtrCollection::Item get() const;
QString getKeyString() const;
const char *getKeyAscii() const;
long getKeyInt() const;
Q3PtrCollection::Item operator()();
Q3PtrCollection::Item operator++();
Q3PtrCollection::Item operator+=(uint);
Q3PtrCollection::Item operator--();
Q3PtrCollection::Item operator-=(uint);
protected:
Q3CListIt *it; // iterator on cache list
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // Q3GCACHE_H
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