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/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.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 or (at your option)
* version 3 of the License.
*
* 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 "LayeredStream.h"
LayeredStream::LayeredStream(QIODevice* baseDevice)
: QIODevice(baseDevice)
, m_baseDevice(baseDevice)
{
connect(baseDevice, SIGNAL(aboutToClose()), SLOT(closeStream()));
}
LayeredStream::~LayeredStream()
{
close();
}
bool LayeredStream::isSequential() const
{
return true;
}
QString LayeredStream::errorString() const
{
return m_baseDevice->errorString();
}
bool LayeredStream::open(QIODevice::OpenMode mode)
{
if (isOpen()) {
qWarning("LayeredStream::open: Device is already open.");
return false;
}
bool readMode = (mode & QIODevice::ReadOnly);
bool writeMode = (mode & QIODevice::WriteOnly);
if (readMode && writeMode) {
qWarning("LayeredStream::open: Reading and writing at the same time is not supported.");
return false;
}
else if (!readMode && !writeMode) {
qWarning("LayeredStream::open: Must be opened in read or write mode.");
return false;
}
else if ((readMode && !m_baseDevice->isReadable()) ||
(writeMode && !m_baseDevice->isWritable())) {
qWarning("LayeredStream::open: Base device is not opened correctly.");
return false;
}
else {
if (mode & QIODevice::Append) {
qWarning("LayeredStream::open: QIODevice::Append is not supported.");
mode = mode & ~QIODevice::Append;
}
if (mode & QIODevice::Truncate) {
qWarning("LayeredStream::open: QIODevice::Truncate is not supported.");
mode = mode & ~QIODevice::Truncate;
}
mode = mode | QIODevice::Unbuffered;
return QIODevice::open(mode);
}
}
qint64 LayeredStream::readData(char* data, qint64 maxSize)
{
return m_baseDevice->read(data, maxSize);
}
qint64 LayeredStream::writeData(const char* data, qint64 maxSize)
{
return m_baseDevice->write(data, maxSize);
}
void LayeredStream::closeStream()
{
close();
}
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