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diff --git a/src/libs/installer/utils.h b/src/libs/installer/utils.h
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+/**************************************************************************
+**
+** This file is part of Installer Framework
+**
+** Copyright (c) 2010-2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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 LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**************************************************************************/
+
+#ifndef QINSTALLER_UTILS_H
+#define QINSTALLER_UTILS_H
+
+#include "installer_global.h"
+
+#include <QtCore/QBuffer>
+#include <QtCore/QCryptographicHash>
+#include <QtCore/QHash>
+#include <QtCore/QUrl>
+#include <QtCore/QTextStream>
+
+#include <ostream>
+
+QT_BEGIN_NAMESPACE
+class QIODevice;
+QT_END_NAMESPACE
+
+namespace QInstaller {
+
+    QByteArray INSTALLER_EXPORT calculateHash(QIODevice *device, QCryptographicHash::Algorithm algo);
+
+    QString INSTALLER_EXPORT replaceVariables(const QHash<QString,QString> &vars, const QString &str);
+    QString INSTALLER_EXPORT replaceWindowsEnvironmentVariables(const QString &str);
+    QStringList INSTALLER_EXPORT parseCommandLineArgs(int argc, char **argv);
+#ifdef Q_OS_WIN
+    QString createCommandline(const QString &program, const QStringList &arguments);
+#endif
+
+    void INSTALLER_EXPORT setVerbose(bool v);
+    bool INSTALLER_EXPORT isVerbose();
+
+    INSTALLER_EXPORT std::ostream& stdverbose();
+    INSTALLER_EXPORT std::ostream& operator<<(std::ostream &os, const QString &string);
+
+    class VerboseWriter;
+    INSTALLER_EXPORT VerboseWriter &verbose();
+
+    class INSTALLER_EXPORT VerboseWriter : public QObject
+    {
+        Q_OBJECT
+    public:
+        VerboseWriter(QObject *parent = 0);
+        ~VerboseWriter();
+
+        static VerboseWriter *instance();
+
+        inline VerboseWriter &operator<<(const char *t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(std::ostream& (*f)(std::ostream &s)) { stdverbose() << *f; stream << "\n"; return *this; }
+    public slots:
+        void setOutputStream(const QString &fileName);
+
+    private:
+        QTextStream stream;
+        QBuffer preFileBuffer;
+        QString logFileName;
+    };
+
+}
+
+#endif // QINSTALLER_UTILS_H