/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the qt3to4 porting application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef RPPTREEEVALUATOR_H
#define RPPTREEEVALUATOR_H

#include "tokenengine.h"
#include "rpp.h"
#include "rpptreewalker.h"
#include <QObject>
#include <QList>
#include <QHash>
#include <QSet>

QT_BEGIN_NAMESPACE

namespace Rpp {

class DefineMap : public QHash<QByteArray, const DefineDirective *>
{

};

class RppTreeEvaluator: public QObject, public RppTreeWalker
{
Q_OBJECT
public:
    RppTreeEvaluator();
    ~RppTreeEvaluator();
    TokenEngine::TokenSectionSequence evaluate(const Source *source,
                                              DefineMap *activedefinitions);
    enum IncludeType {QuoteInclude, AngleBracketInclude};
signals:
    void includeCallback(Rpp::Source *&includee,
                         const Rpp::Source *includer,
                         const QString &filename,
                         Rpp::RppTreeEvaluator::IncludeType includeType);
protected:
    void evaluateIncludeDirective(const IncludeDirective *directive);
    void evaluateDefineDirective(const DefineDirective *directive);
    void evaluateUndefDirective(const UndefDirective *directive);
    void evaluateIfSection(const IfSection *ifSection);
    void evaluateText(const Text *text);
    bool evaluateCondition(const ConditionalDirective *conditionalDirective);
    int evaluateExpression(Expression *expression);

    TokenEngine::TokenContainer evaluateMacro(TokenEngine::TokenContainer tokenContainer, int &identiferTokenIndex);
    TokenEngine::TokenContainer evaluateMacroInternal(QSet<QByteArray> skip, TokenEngine::TokenContainer tokenContainer);
    TokenEngine::TokenContainer cloneTokenList(const TokenEngine::TokenList &list);
    Source *getParentSource(const Item *item) const;
    IncludeType includeTypeFromDirective(
                    const IncludeDirective *includeDirective) const;
private:
    QVector<TokenEngine::TokenSection> m_tokenSections;
    DefineMap *m_activeDefinitions;
    TokenEngine::TokenSection *newlineSection;
};

class MacroFunctionParser
{
public:
    MacroFunctionParser(const TokenEngine::TokenContainer &tokenContainer, int startToken);
    bool isValid();
    int tokenCount();
    int argumentCount();
    TokenEngine::TokenSection argument(int argumentIndex);
private:
    const TokenEngine::TokenContainer &m_tokenContainer;
    const int m_startToken;
    int m_numTokens;
    bool m_valid;
    QVector<TokenEngine::TokenSection> m_arguments;
};

}//namespace Rpp

QT_END_NAMESPACE

#endif