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diff --git a/src/libs/utils/environment.h b/src/libs/utils/environment.h
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+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation ([email protected])
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef UTILS_ENVIRONMENT_H
+#define UTILS_ENVIRONMENT_H
+
+#include "utils_global.h"
+
+#include <QtCore/QString>
+#include <QtCore/QStringList>
+#include <QtCore/QMap>
+#include <QtCore/QList>
+
+namespace Utils {
+
+class QTCREATOR_UTILS_EXPORT EnvironmentItem
+{
+public:
+    EnvironmentItem(QString n, QString v)
+            : name(n), value(v), unset(false)
+    {}
+
+    QString name;
+    QString value;
+    bool unset;
+
+    bool operator==(const EnvironmentItem &other)
+    {
+        return (unset == other.unset) && (name == other.name) && (value == other.value);
+    }
+
+    static QList<EnvironmentItem> fromStringList(QStringList list);
+    static QStringList toStringList(QList<EnvironmentItem> list);
+};
+
+class QTCREATOR_UTILS_EXPORT Environment {
+public:
+    typedef QMap<QString, QString>::const_iterator const_iterator;
+
+    Environment();
+    explicit Environment(QStringList env);
+    static Environment systemEnvironment();
+
+    QStringList toStringList() const;
+    QString value(const QString &key) const;
+    void set(const QString &key, const QString &value);
+    void unset(const QString &key);
+    void modify(const QList<EnvironmentItem> & list);
+    bool hasKey(const QString &key);
+
+    void appendOrSet(const QString &key, const QString &value, const QString &sep = QString());
+    void prependOrSet(const QString &key, const QString &value, const QString &sep = QString());
+
+    void appendOrSetPath(const QString &value);
+    void prependOrSetPath(const QString &value);
+
+    void clear();
+    int size() const;
+
+    Environment::const_iterator find(const QString &name);
+    QString key(Environment::const_iterator it) const;
+    QString value(Environment::const_iterator it) const;
+
+    Environment::const_iterator constBegin() const;
+    Environment::const_iterator constEnd() const;
+
+    QString searchInPath(QString executable) const;
+    QStringList path() const;
+
+    static QStringList parseCombinedArgString(const QString &program);
+    static QString joinArgumentList(const QStringList &arguments);
+
+    QString expandVariables(const QString &) const;
+
+    bool operator!=(const Environment &other) const;
+    bool operator==(const Environment &other) const;
+private:
+    QMap<QString, QString> m_values;
+};
+
+} // namespace Utils
+
+#endif // UTILS_ENVIRONMENT_H