keepassxc

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/*
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 *  Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
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 *
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 *  This program is free software: you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation, either version 2 or (at your option)
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 *  version 3 of the License.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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#include "LayeredStream.h"
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LayeredStream::LayeredStream(QIODevice* baseDevice)
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    : QIODevice(baseDevice)
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    , m_baseDevice(baseDevice)
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{
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    connect(baseDevice, SIGNAL(aboutToClose()), SLOT(closeStream()));
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}
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LayeredStream::~LayeredStream()
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{
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    QIODevice::close();
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}
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bool LayeredStream::isSequential() const
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{
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    return true;
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}
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bool LayeredStream::open(QIODevice::OpenMode mode)
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{
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    if (isOpen()) {
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        qWarning("LayeredStream::open: Device is already open.");
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        return false;
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    }
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    bool readMode = (mode & QIODevice::ReadOnly);
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    bool writeMode = (mode & QIODevice::WriteOnly);
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    if (readMode && writeMode) {
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        qWarning("LayeredStream::open: Reading and writing at the same time is not supported.");
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        return false;
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    } else if (!readMode && !writeMode) {
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        qWarning("LayeredStream::open: Must be opened in read or write mode.");
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        return false;
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    } else if ((readMode && !m_baseDevice->isReadable()) || (writeMode && !m_baseDevice->isWritable())) {
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        qWarning("LayeredStream::open: Base device is not opened correctly.");
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        return false;
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    } else {
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        if (mode & QIODevice::Append) {
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            qWarning("LayeredStream::open: QIODevice::Append is not supported.");
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            mode = mode & ~QIODevice::Append;
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        }
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        if (mode & QIODevice::Truncate) {
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            qWarning("LayeredStream::open: QIODevice::Truncate is not supported.");
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            mode = mode & ~QIODevice::Truncate;
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        }
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        mode = mode | QIODevice::Unbuffered;
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        return QIODevice::open(mode);
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    }
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}
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qint64 LayeredStream::readData(char* data, qint64 maxSize)
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{
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    return m_baseDevice->read(data, maxSize);
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}
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qint64 LayeredStream::writeData(const char* data, qint64 maxSize)
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{
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    return m_baseDevice->write(data, maxSize);
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}
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void LayeredStream::closeStream()
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{
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    close();
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}
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