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68 lines
1.9 KiB
68 lines
1.9 KiB
15 years ago
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/***************************************************************************
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begin : Sat Sep 7 2002
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copyright : (C) 2002 - 2004 by Scott Wheeler
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email : wheeler@kde.org
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef CACHE_H
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#define CACHE_H
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#include "stringhash.h"
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class Tag;
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class Playlist;
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class PlaylistCollection;
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typedef QValueList<Playlist *> PlaylistList;
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class Cache : public FileHandleHash
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{
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public:
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static Cache *instance();
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void save();
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static void loadPlaylists(PlaylistCollection *collection);
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static void savePlaylists(const PlaylistList &playlists);
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static bool cacheFileExists();
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protected:
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Cache();
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void load();
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private:
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static const int m_currentVersion = 1;
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};
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/**
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* A simple QDataStream subclass that has an extra field to indicate the cache
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* version.
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*/
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class CacheDataStream : public QDataStream
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{
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public:
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CacheDataStream(QIODevice *d) : QDataStream(d), m_cacheVersion(0) {}
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CacheDataStream(QByteArray a, int mode) : QDataStream(a, mode), m_cacheVersion(0) {}
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virtual ~CacheDataStream() {}
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int cacheVersion() const { return m_cacheVersion; }
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void setCacheVersion(int v) { m_cacheVersion = v; }
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private:
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int m_cacheVersion;
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};
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#endif
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