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+/****************************************************************************
+**
+** Copyright (C) 2011 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