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diff --git a/src/libs/installer/libarchivewrapper_p.h b/src/libs/installer/libarchivewrapper_p.h
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+/**************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Installer Framework.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+**************************************************************************/
+
+#ifndef LIBARCHIVEWRAPPER_P_H
+#define LIBARCHIVEWRAPPER_P_H
+
+#include "installer_global.h"
+#include "remoteobject.h"
+#include "libarchivearchive.h"
+#include "lib7zarchive.h"
+
+#include <QTimer>
+#include <QReadWriteLock>
+
+namespace QInstaller {
+
+class INSTALLER_EXPORT LibArchiveWrapperPrivate : public RemoteObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(LibArchiveWrapperPrivate)
+
+public:
+    explicit LibArchiveWrapperPrivate(const QString &filename);
+    LibArchiveWrapperPrivate();
+    ~LibArchiveWrapperPrivate();
+
+    bool open(QIODevice::OpenMode mode);
+    void close();
+    void setFilename(const QString &filename);
+
+    QString errorString() const;
+
+    bool extract(const QString &dirPath, const quint64 totalFiles = 0);
+    bool create(const QStringList &data);
+    QVector<ArchiveEntry> list();
+    bool isSupported();
+
+    void setCompressionLevel(const AbstractArchive::CompressionLevel level);
+
+Q_SIGNALS:
+    void currentEntryChanged(const QString &filename);
+    void completedChanged(const quint64 completed, const quint64 total);
+    void dataBlockRequested();
+    void remoteWorkerFinished();
+
+public Q_SLOTS:
+    void cancel();
+
+private Q_SLOTS:
+    void processSignals();
+    void onDataBlockRequested();
+
+private:
+    void init();
+
+    void addDataBlock(const QByteArray &buffer);
+    void setClientDataAtEnd();
+    ExtractWorker::Status workerStatus() const;
+
+private:
+    QTimer m_timer;
+    mutable QReadWriteLock m_lock;
+
+    LibArchiveArchive m_archive;
+};
+
+} // namespace QInstaller
+
+#endif // LIBARCHIVEWRAPPER_P_H