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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef FILEMANAGER_H
#define FILEMANAGER_H
#include <QBitArray>
#include <QList>
#include <QMutex>
#include <QThread>
#include <QWaitCondition>
#include "metainfo.h"
QT_BEGIN_NAMESPACE
class QByteArray;
class QFile;
class QTimerEvent;
QT_END_NAMESPACE
class FileManager : public QThread
{
Q_OBJECT
public:
FileManager(QObject *parent = 0);
virtual ~FileManager();
inline void setMetaInfo(const MetaInfo &info) { metaInfo = info; }
inline void setDestinationFolder(const QString &directory) { destinationPath = directory; }
int read(int pieceIndex, int offset, int length);
void write(int pieceIndex, int offset, const QByteArray &data);
void verifyPiece(int pieceIndex);
inline qint64 totalSize() const { return totalLength; }
inline int pieceCount() const { return numPieces; }
int pieceLengthAt(int pieceIndex) const;
QBitArray completedPieces() const;
void setCompletedPieces(const QBitArray &pieces);
QString errorString() const;
public slots:
void startDataVerification();
signals:
void dataRead(int id, int pieceIndex, int offset, const QByteArray &data);
void error();
void verificationProgress(int percent);
void verificationDone();
void pieceVerified(int pieceIndex, bool verified);
protected:
void run();
private slots:
bool verifySinglePiece(int pieceIndex);
void wakeUp();
private:
bool generateFiles();
QByteArray readBlock(int pieceIndex, int offset, int length);
bool writeBlock(int pieceIndex, int offset, const QByteArray &data);
void verifyFileContents();
struct WriteRequest {
int pieceIndex;
int offset;
QByteArray data;
};
struct ReadRequest {
int pieceIndex;
int offset;
int length;
int id;
};
QString errString;
QString destinationPath;
MetaInfo metaInfo;
QList<QFile *> files;
QList<QByteArray> sha1s;
QBitArray verifiedPieces;
bool newFile;
int pieceLength;
qint64 totalLength;
int numPieces;
int readId;
bool startVerification;
bool quit;
bool wokeUp;
QList<WriteRequest> writeRequests;
QList<ReadRequest> readRequests;
QList<int> pendingVerificationRequests;
QList<int> newPendingVerificationRequests;
QList<qint64> fileSizes;
mutable QMutex mutex;
mutable QWaitCondition cond;
};
#endif
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