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/* This file is part of the KDE project
Copyright (C) 2002 Simon Hausmann <hausmann@kde.org>
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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "memfile.h"
#include <unistd.h>
#include <sys/mman.h>
MemFile::MemFile()
{
}
MemFile::MemFile( const QString &name )
: QFile( name )
{
}
MemFile::~MemFile()
{
close();
}
void MemFile::close()
{
unmap();
QFile::close();
}
void MemFile::unmap()
{
#if defined(Q_WS_X11) || defined(Q_WS_QWS)
if ( m_data.data() )
{
munmap( m_data.data(), m_data.size() );
m_data.resetRawData( m_data.data(), m_data.size() );
}
#endif
}
QByteArray &MemFile::data()
{
if ( !m_data.data() )
{
#if defined(Q_WS_X11) || defined(Q_WS_QWS)
const char *rawData = (const char *)mmap( 0, size(), PROT_READ,
MAP_SHARED, handle(), 0 );
if ( rawData )
{
m_data.setRawData( rawData, size() );
return m_data;
}
else
qDebug( "MemFile: mmap() failed!" );
// fallback
#endif
m_data = readAll();
}
return m_data;
}
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