mirror of
https://bitbucket.org/smil3y/kdelibs.git
synced 2025-02-24 19:02:48 +00:00
65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
|
/* This file is part of the KDE libraries
|
||
|
|
Copyright (C) 2001, 2002, 2007 David Faure <faure@kde.org>
|
||
|
|
|
||
|
|
This library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public
|
||
|
|
License version 2 as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
This library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public License
|
||
|
|
along with this library; see the file COPYING.LIB. If not, write to
|
||
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
|
|
Boston, MA 02110-1301, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef klimitediodevice_p_h
|
||
|
|
#define klimitediodevice_p_h
|
||
|
|
|
||
|
|
#include <kdebug.h>
|
||
|
|
#include <QtCore/QIODevice>
|
||
|
|
/**
|
||
|
|
* A readonly device that reads from an underlying device
|
||
|
|
* from a given point to another (e.g. to give access to a single
|
||
|
|
* file inside an archive).
|
||
|
|
* @author David Faure <faure@kde.org>
|
||
|
|
* @internal - used by KArchive
|
||
|
|
*/
|
||
|
|
class KLimitedIODevice : public QIODevice
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/**
|
||
|
|
* Creates a new KLimitedIODevice.
|
||
|
|
* @param dev the underlying device, opened or not
|
||
|
|
* This device itself auto-opens (in readonly mode), no need to open it.
|
||
|
|
* @param start where to start reading (position in bytes)
|
||
|
|
* @param length the length of the data to read (in bytes)
|
||
|
|
*/
|
||
|
|
KLimitedIODevice( QIODevice *dev, qint64 start, qint64 length );
|
||
|
|
virtual ~KLimitedIODevice() {}
|
||
|
|
|
||
|
|
virtual bool isSequential() const;
|
||
|
|
|
||
|
|
virtual bool open( QIODevice::OpenMode m );
|
||
|
|
virtual void close();
|
||
|
|
|
||
|
|
virtual qint64 size() const;
|
||
|
|
|
||
|
|
virtual qint64 readData ( char * data, qint64 maxlen );
|
||
|
|
virtual qint64 writeData ( const char *, qint64 ) { return -1; } // unsupported
|
||
|
|
virtual int putChar( int ) { return -1; } // unsupported
|
||
|
|
|
||
|
|
//virtual qint64 pos() const { return m_dev->pos() - m_start; }
|
||
|
|
virtual bool seek( qint64 pos );
|
||
|
|
virtual qint64 bytesAvailable() const;
|
||
|
|
private:
|
||
|
|
QIODevice* m_dev;
|
||
|
|
qint64 m_start;
|
||
|
|
qint64 m_length;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|