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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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,
Zstandard,
};
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();
void setDecompressedSafetyCheckThreshold(qint64 threshold);
static bool isSupportedEncoding(const QByteArray &encoding);
static QByteArrayList acceptedEncoding();
QString errorString() const;
private:
bool isPotentialArchiveBomb() const;
bool hasDataInternal() const;
qsizetype readInternal(char *data, qsizetype maxSize);
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);
qsizetype readZstandard(char *data, qsizetype maxSize);
QByteDataBuffer compressedDataBuffer;
QByteDataBuffer decompressedDataBuffer;
const qsizetype MaxDecompressedDataBufferSize = 10 * 1024 * 1024;
bool decoderHasData = false;
bool countDecompressed = false;
std::unique_ptr<QDecompressHelper> countHelper;
QString errorStr;
// Used for calculating the ratio
qint64 archiveBombCheckThreshold = 10 * 1024 * 1024;
qint64 totalUncompressedBytes = 0;
qint64 totalCompressedBytes = 0;
qint64 totalBytesRead = 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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