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diff --git a/installerbuilder/common/utils.h b/installerbuilder/common/utils.h
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+/**************************************************************************
+**
+** This file is part of Qt SDK**
+**
+** Copyright (c) 2010 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.
+**
+** If you are unsure which license is appropriate for your use, please contact
+** (qt-info@nokia.com).
+**
+**************************************************************************/
+#ifndef QINSTALLER_UTILS_H
+#define QINSTALLER_UTILS_H
+
+#include <QtCore/QCryptographicHash>
+#include <QtCore/QFile>
+#include <QtCore/QTextStream>
+#include <QtCore/QBuffer>
+#include <QtCore/QUrl>
+
+#include "installer_global.h"
+
+#include <ostream>
+
+class QByteArray;
+class QIODevice;
+class QString;
+class QUrl;
+
+template< typename T >
+class QList;
+
+template<typename K, typename V> class QHash;
+
+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 );
+
+    void INSTALLER_EXPORT setVerbose( bool v );
+    bool INSTALLER_EXPORT isVerbose();
+
+    INSTALLER_EXPORT std::ostream& stdverbose();
+
+
+    INSTALLER_EXPORT std::ostream& operator<<( std::ostream& os, const QUrl& url );
+    INSTALLER_EXPORT std::ostream& operator<<( std::ostream& os, const QString& string );
+    INSTALLER_EXPORT std::ostream& operator<<( std::ostream& os, const QByteArray& array );
+    template< typename T >
+    std::ostream& operator<<( std::ostream& os, const QList< T >& list )
+    {
+        os << "(";
+        for( typename QList< T >::const_iterator it = list.begin(); it != list.end(); ++it )
+            os << *it;
+        os << ");";
+        return os;
+    }
+
+    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<<(bool t) { stdverbose() << t; stream << (t ? "true" : "false"); return *this; }
+        inline VerboseWriter &operator<<(int t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(qint64 t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(quint64 t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(double t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(std::string &t) { stdverbose() << t; stream << QString::fromStdString(t); return *this; }
+        inline VerboseWriter &operator<<(const QByteArray &t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(const QString &t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(const QLatin1String &t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(const char *t) { stdverbose() << t; stream << t; return *this; }
+        inline VerboseWriter &operator<<(const QUrl &t) { return verbose() << t.toString(); }
+        template< typename T >
+        VerboseWriter& operator<<(const QList< T >& list )
+        {
+            verbose() << "List ( ";
+            for( typename QList< T >::const_iterator it = list.begin(); it != list.end(); ++it )
+                verbose() << *it <<"; ";
+            return verbose() << ");";
+        }
+
+        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