svcore  1.9
BZipFileDevice.h
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00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
00002 
00003 /*
00004     Sonic Visualiser
00005     An audio file viewer and annotation editor.
00006     Centre for Digital Music, Queen Mary, University of London.
00007     This file copyright 2006 Chris Cannam.
00008     
00009     This program is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU General Public License as
00011     published by the Free Software Foundation; either version 2 of the
00012     License, or (at your option) any later version.  See the file
00013     COPYING included with this distribution for more information.
00014 */
00015 
00016 #ifndef _BZIP_FILE_DEVICE_H_
00017 #define _BZIP_FILE_DEVICE_H_
00018 
00019 #include <QIODevice>
00020 
00021 #include <bzlib.h>
00022 
00023 class BZipFileDevice : public QIODevice
00024 {
00025     Q_OBJECT
00026 
00027 public:
00028     BZipFileDevice(QString fileName);
00029     virtual ~BZipFileDevice();
00030     
00031     virtual bool open(OpenMode mode);
00032     virtual void close();
00033 
00034     virtual bool isOK() const;
00035 
00036     virtual bool isSequential() const { return true; }
00037 
00038 protected:
00039     virtual qint64 readData(char *data, qint64 maxSize);
00040     virtual qint64 writeData(const char *data, qint64 maxSize);
00041 
00042     QString m_fileName;
00043 
00044     FILE *m_file;
00045     BZFILE *m_bzFile;
00046     bool m_atEnd;
00047     bool m_ok;
00048 };
00049 
00050 #endif