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KIO

klimitediodevice.h

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00001 /* This file is part of the KDE libraries
00002    Copyright (C) 2001, 2002, 2007 David Faure <faure@kde.org>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License version 2 as published by the Free Software Foundation.
00007 
00008    This library is distributed in the hope that it will be useful,
00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011    Library General Public License for more details.
00012 
00013    You should have received a copy of the GNU Library General Public License
00014    along with this library; see the file COPYING.LIB.  If not, write to
00015    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016    Boston, MA 02110-1301, USA.
00017 */
00018 
00019 #ifndef klimitediodevice_h
00020 #define klimitediodevice_h
00021 
00022 #include <kdebug.h>
00023 #include <QtCore/QIODevice>
00031 class KLimitedIODevice : public QIODevice
00032 {
00033 public:
00041     KLimitedIODevice( QIODevice *dev, int start, int length );
00042     virtual ~KLimitedIODevice() {}
00043 
00044     virtual bool isSequential() const;
00045 
00046     virtual bool open( QIODevice::OpenMode m );
00047     virtual void close();
00048 
00049     virtual qint64 size() const;
00050 
00051     virtual qint64 readData ( char * data, qint64 maxlen );
00052     virtual qint64 writeData ( const char *, qint64 ) { return -1; } // unsupported
00053     virtual int putChar( int ) { return -1; } // unsupported
00054 
00055     //virtual qint64 pos() const { return m_dev->pos() - m_start; }
00056     virtual bool seek( qint64 pos );
00057     virtual qint64 bytesAvailable() const;
00058 private:
00059     QIODevice* m_dev;
00060     qint64 m_start;
00061     qint64 m_length;
00062 };
00063 
00064 #endif

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