/****************************************************************************
**
** Copyright (C) 1992-2009 Nokia. All rights reserved.
** Copyright (C) 2002-2005 Roberto Raggi <roberto@kdevelop.org>
**
** This file is part of Qt Jambi.
**
** 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.

In addition, as a special exception, Nokia gives you certain
additional rights. These rights are described in the Nokia Qt LGPL
Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
package.

GNU General Public License Usage
Alternatively, this file may be used under the terms of the GNU
General Public License version 3.0 as published by the Free Software
Foundation and appearing in the file LICENSE.GPL included in the
packaging of this file.  Please review the following information to
ensure the GNU General Public License version 3.0 requirements will be
met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please
contact the sales department at qt-sales@nokia.com.

**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/


#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;