This is the verbatim text of the qgcache.h include file. It is is provided only for illustration; the copyright remains with Troll Tech
/****************************************************************************
** $Id: qgcache.h,v 2.1 1997/08/06 15:05:52 hanord Exp $
**
** Definition of QGCache and QGCacheIterator classes
**
** Created : 950208
**
** Copyright (C) 1995-1997 by Troll Tech AS. All rights reserved.
**
*****************************************************************************/
#ifndef QGCACHE_H
#define QGCACHE_H
#include "qcollect.h"
#include "qglist.h"
#include "qgdict.h"
class QCList; // internal classes
class QCDict;
/*****************************************************************************
QGCache class
*****************************************************************************/
class QGCache : public QCollection // LRU cache class
{
friend class QGCacheIterator;
protected:
QGCache( int maxCost, uint size,bool caseS, bool copyKeys, bool trivial );
QGCache( const QGCache & ); // not allowed, calls fatal()
~QGCache();
QGCache &operator=( const QGCache & ); // not allowed, calls fatal()
uint count() const { return ((QGDict*)dict)->count(); }
uint size() const { return ((QGDict*)dict)->size(); }
int maxCost() const { return mCost; }
int totalCost() const { return tCost; }
void setMaxCost( int maxCost );
bool insert( const char *key, GCI, int cost, int priority );
bool remove( const char *key );
GCI take( const char *key );
void clear();
GCI find( const char *key, bool ref=TRUE ) const;
void statistics() const; // output debug statistics
private:
bool makeRoomFor( int cost, int priority = -1 );
QCList *lruList;
QCDict *dict;
int mCost;
int tCost;
bool copyK;
};
/*****************************************************************************
QGCacheIterator class
*****************************************************************************/
class QListIteratorM_QCacheItem;
class QGCacheIterator // QGCache iterator
{
protected:
QGCacheIterator( const QGCache & );
QGCacheIterator( const QGCacheIterator & );
~QGCacheIterator();
QGCacheIterator &operator=( const QGCacheIterator & );
uint count() const; // number of items in cache
bool atFirst() const; // test if at first item
bool atLast() const; // test if at last item
GCI toFirst(); // move to first item
GCI toLast(); // move to last item
GCI get() const; // get current item
const char *getKey() const; // get current key
GCI operator()(); // get current and move to next
GCI operator++(); // move to next item (prefix)
GCI operator+=( uint ); // move n positions forward
GCI operator--(); // move to prev item (prefix)
GCI operator-=( uint ); // move n positions backward
protected:
QListIteratorM_QCacheItem *it; // iterator on cache list
};
#endif // QGCACHE_H