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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DECOMPRESS_HELPER_P_H
#define DECOMPRESS_HELPER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the Network Access API. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include <QtNetwork/private/qtnetworkglobal_p.h>
#include <QtCore/private/qbytedata_p.h>
#include <memory>
QT_BEGIN_NAMESPACE
class QIODevice;
class Q_AUTOTEST_EXPORT QDecompressHelper
{
public:
enum ContentEncoding {
None,
Deflate,
GZip,
Brotli,
};
QDecompressHelper() = default;
~QDecompressHelper();
bool setEncoding(const QByteArray &contentEncoding);
bool isCountingBytes() const;
void setCountingBytesEnabled(bool shouldCount);
qint64 uncompressedSize() const;
bool hasData() const;
void feed(const QByteArray &data);
void feed(QByteArray &&data);
void feed(const QByteDataBuffer &buffer);
void feed(QByteDataBuffer &&buffer);
qsizetype read(char *data, qsizetype maxSize);
bool isValid() const;
void clear();
static bool isSupportedEncoding(const QByteArray &encoding);
static QByteArrayList acceptedEncoding();
private:
bool countInternal();
bool countInternal(const QByteArray &data);
bool countInternal(const QByteDataBuffer &buffer);
bool setEncoding(ContentEncoding ce);
qint64 encodedBytesAvailable() const;
qsizetype readZLib(char *data, qsizetype maxSize);
qsizetype readBrotli(char *data, qsizetype maxSize);
QByteDataBuffer compressedDataBuffer;
bool decoderHasData = false;
bool countDecompressed = false;
std::unique_ptr<QDecompressHelper> countHelper;
qint64 uncompressedBytes = 0;
ContentEncoding contentEncoding = None;
void *decoderPointer = nullptr;
#if QT_CONFIG(brotli)
const uint8_t *brotliUnconsumedDataPtr = nullptr;
size_t brotliUnconsumedAmount = 0;
#endif
};
QT_END_NAMESPACE
#endif // DECOMPRESS_HELPER_P_H
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