Qt 4.3: filemanager.h Example File (network/torrent/filemanager.h)

|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# filemanager.h Example File
network/torrent/filemanager.h

     /****************************************************************************
     **
     ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
    ** your option) use any later version of the GNU General Public
    ** License if such license has been publicly approved by Trolltech ASA
    ** (or its successors, if any) and the KDE Free Qt Foundation. In
    ** addition, as a special exception, Trolltech gives you certain
    ** additional rights. These rights are described in the Trolltech GPL
    ** Exception version 1.2, which can be found at
    ** http://www.trolltech.com/products/qt/gplexception/ and in the file
    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** In addition, as a special exception, Trolltech, as the sole
    ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
    ** Integration plug-in the right for the Qt/Eclipse Integration to
    ** link to functionality provided by Qt Designer and its related
    ** libraries.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
    ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef FILEMANAGER_H
     #define FILEMANAGER_H

     class QByteArray;
     class QFile;
     class QTimerEvent;

     #include <QBitArray>
     #include <QList>
     #include <QMutex>
     #include <QThread>
     #include <QWaitCondition>

     #include "metainfo.h"

     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