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/****************************************************************************************
* Copyright (C) 2003-2010 Mark Kretschmann <kretschmann@kde.org> *
* Copyright (C) 2008 Dan Meltzer <parallelgrapefruit@gmail.com> *
* Copyright (C) 2008-2009 Jeff Mitchell <mitchell@kde.org> *
* Copyright (c) 2012 Matěj Laitl <matej@laitl.cz> *
* *
* 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. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License along with *
* this program. If not, see <http://www.gnu.org/licenses/>. *
****************************************************************************************/
#include "ScanningState.h"
#include <QBuffer>
#include <QDataStream>
#include <QtDebug>
#ifdef Q_CC_MSVC
#define __PRETTY_FUNCTION__ __FUNCSIG__
#endif
using namespace CollectionScanner;
ScanningState::ScanningState()
: m_sharedMemory( nullptr )
, m_lastFilePos( 0 )
{
}
ScanningState::~ScanningState()
{
delete m_sharedMemory;
}
void
ScanningState::setKey( const QString &key )
{
delete m_sharedMemory;
m_sharedMemory = new QSharedMemory( key );
m_sharedMemory->attach();
}
bool
ScanningState::isValid() const
{
return m_sharedMemory && m_sharedMemory->isAttached();
}
QString
ScanningState::lastDirectory() const
{
return m_lastDirectory;
}
void
ScanningState::setLastDirectory( const QString &dir )
{
if( dir == m_lastDirectory )
return;
m_lastDirectory = dir;
writeFull();
}
QStringList
ScanningState::badFiles() const
{
return m_badFiles;
}
void
ScanningState::setBadFiles( const QStringList &badFiles )
{
if( badFiles == m_badFiles )
return;
m_badFiles = badFiles;
writeFull();
}
QString
ScanningState::lastFile() const
{
return m_lastFile;
}
void
ScanningState::setLastFile( const QString &file )
{
if( file == m_lastFile )
return;
m_lastFile = file;
if( !isValid() )
return;
QBuffer buffer;
QDataStream out(&buffer);
buffer.open(QBuffer::WriteOnly);
out << m_lastFile;
int size = buffer.size();
if( size + m_lastFilePos < m_sharedMemory->size() )
{
char *to = (char*)m_sharedMemory->data();
const char *from = buffer.data().data();
memcpy(to + m_lastFilePos, from, size);
}
else
{
qDebug() << __PRETTY_FUNCTION__ << "QSharedMemory is too small to hold the data.";
qDebug() << "It is of size" << m_sharedMemory->size() << "bytes but we need more than"
<< size + m_lastFilePos << "bytes.";
}
m_sharedMemory->unlock();
}
void
ScanningState::readFull()
{
if( !isValid() )
return;
QBuffer buffer;
QDataStream in(&buffer);
m_sharedMemory->lock();
buffer.setData((char*)m_sharedMemory->constData(), m_sharedMemory->size());
buffer.open(QBuffer::ReadOnly);
in >> m_lastDirectory;
in >> m_badFiles;
m_lastFilePos = buffer.pos();
in >> m_lastFile;
m_sharedMemory->unlock();
}
void
ScanningState::writeFull()
{
if( !isValid() )
return;
QBuffer buffer;
QDataStream out(&buffer);
buffer.open(QBuffer::WriteOnly);
out << m_lastDirectory;
out << m_badFiles;
m_lastFilePos = buffer.pos();
out << m_lastFile;
int size = buffer.size();
m_sharedMemory->lock();
if( size < m_sharedMemory->size() )
{
char *to = (char*)m_sharedMemory->data();
const char *from = buffer.data().data();
memcpy(to, from, size);
}
else
{
qDebug() << __PRETTY_FUNCTION__ << "QSharedMemory is too small to hold the data.";
qDebug() << "It is of size" << m_sharedMemory->size() << "bytes but we need more than"
<< size << "bytes.";
}
m_sharedMemory->unlock();
}
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