/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2002-2005 Roberto Raggi <roberto@kdevelop.org>
** Contact: https://www.qt.io/licensing/
**
** This file is part of PySide2.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 CONTROL_H
#define CONTROL_H

#include "symbol.h"
#include "smallobject.h"

#include <QtCore/QHash>

struct Declarator;
struct Type;
class Lexer;
class Parser;

struct Context {
    Context *parent;

    inline void bind(const NameSymbol *name, Type *type) {
        symbol_table.insert(name, type);
    }

    inline Type *resolve(const NameSymbol *name) const {
        if (Type *type = symbol_table.value(name))
            return type;
        else if (parent)
            return parent->resolve(name);

        return 0;
    }

    typedef QHash<const NameSymbol*, Type*> symbol_table_t;

    symbol_table_t symbol_table;
};

class Control
{
public:
    class ErrorMessage
    {
    public:
        ErrorMessage():
                _M_line(0),
                _M_column(0) {}

        inline int line() const {
            return _M_line;
        }
        inline void setLine(int line) {
            _M_line = line;
        }

        inline int column() const {
            return _M_column;
        }
        inline void setColumn(int column) {
            _M_column = column;
        }

        inline QString fileName() const {
            return _M_fileName;
        }
        inline void setFileName(const QString &fileName) {
            _M_fileName = fileName;
        }

        inline QString message() const {
            return _M_message;
        }
        inline void setMessage(const QString &message) {
            _M_message = message;
        }

    private:
        int _M_line;
        int _M_column;
        QString _M_fileName;
        QString _M_message;
    };

    Control();
    ~Control();

    inline bool skipFunctionBody() const {
        return _M_skipFunctionBody;
    }
    inline void setSkipFunctionBody(bool skip) {
        _M_skipFunctionBody = skip;
    }

    Lexer *changeLexer(Lexer *lexer);
    Parser *changeParser(Parser *parser);

    Lexer *currentLexer() const {
        return _M_lexer;
    }
    Parser *currentParser() const {
        return _M_parser;
    }

    Context *current_context;

    inline Context *currentContext() const {
        return current_context;
    }

    void pushContext();
    void popContext();

    Type *lookupType(const NameSymbol *name) const;
    void declare(const NameSymbol *name, Type *type);

    inline const NameSymbol *findOrInsertName(const char *data, size_t count) {
        return name_table.findOrInsert(data, count);
    }

    void declareTypedef(const NameSymbol *name, Declarator *d);
    bool isTypedef(const NameSymbol *name) const;

    void reportError(const ErrorMessage &errmsg);
    QList<ErrorMessage> errorMessages() const;
    void clearErrorMessages();

private:
    NameTable name_table;
    QHash<const NameSymbol*, Declarator*> stl_typedef_table;
    bool _M_skipFunctionBody;
    Lexer *_M_lexer;
    Parser *_M_parser;

    QList<ErrorMessage> _M_error_messages;
};

#endif // CONTROL_H

// kate: space-indent on; indent-width 2; replace-tabs on;