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/****************************************************************************
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of a Qt Solutions component.
**
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Solutions Commercial License Agreement provided
** with the Software or, alternatively, in accordance with the terms
** contained in a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LICENSE.NOKIA-LGPL-EXCEPTION
** in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL-3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** Please note Third Party Software included with Qt Solutions may impose
** additional restrictions and it is the user's responsibility to ensure
** that they have met the licensing requirements of the GPL, LGPL, or Qt
** Solutions Commercial license and the relevant license of the Third
** Party Software they are using.
**
** If you are unsure which license is appropriate for your use, please
** contact Nokia at qt-info@nokia.com.
**
****************************************************************************/
#ifndef QTIOCOMPRESSOR_H
#define QTIOCOMPRESSOR_H
#include <QIODevice>
class QtIOCompressorPrivate;
class QtIOCompressor : public QIODevice
{
Q_OBJECT
public:
enum StreamFormat { ZlibFormat, GzipFormat, RawZipFormat };
QtIOCompressor(QIODevice *device, int compressionLevel = 6, int bufferSize = 65500);
~QtIOCompressor();
void setStreamFormat(StreamFormat format);
StreamFormat streamFormat() const;
static bool isGzipSupported();
bool isSequential() const;
bool open(OpenMode mode);
void close();
void flush();
qint64 bytesAvailable() const;
protected:
qint64 readData(char * data, qint64 maxSize);
qint64 writeData(const char * data, qint64 maxSize);
private:
static bool checkGzipSupport(const char * const versionString);
QtIOCompressorPrivate *d_ptr;
Q_DECLARE_PRIVATE(QtIOCompressor)
Q_DISABLE_COPY(QtIOCompressor)
};
#endif
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