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