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/*************************************************************************
RecoveryMapping.cpp - mapping of a recovered range in a audio file
-------------------
begin : Sun May 12 2002
copyright : (C) 2002 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "config.h"
#include <QIODevice>
#include "RecoveryMapping.h"
//***************************************************************************
Kwave::RecoveryMapping::RecoveryMapping(quint64 offset,
quint64 length,
QIODevice &dev,
quint64 dev_offset)
:Kwave::RecoverySource(offset, length),
m_dev(dev), m_dev_offset(dev_offset)
{
}
//***************************************************************************
qint64 Kwave::RecoveryMapping::read(quint64 offset, char *data,
unsigned int bytes)
{
if (offset < this->offset()) return 0;
if (offset > end()) return 0;
qint64 off = offset - this->offset();
qint64 len = length() - off;
if (bytes < len) len = bytes;
if (!len) return 0;
if (!m_dev.seek(m_dev_offset + off)) return 0;
return m_dev.read(data, len);
}
//***************************************************************************
//***************************************************************************
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