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/*
    Copyright (C) 2003 by Walter Schreppers 
    Copyright (C) 2004 by Cies Breijs   
     
    This program is free software; you can redistribute it and/or
    modify it under the terms of version 2 of the GNU General Public
    License as published by the Free Software Foundation.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

    
#ifndef _LEXER_H_
#define _LEXER_H_

#include <qmap.h>
#include <qstring.h>
#include <qtextstream.h>

#include "token.h"
#include "translate.h"
#include "value.h"


class Lexer
{
	public:
		Lexer(QTextIStream&);
		~Lexer() {}
	
		Token lex(); // returns the next Token, skipping spaces


	private:
		QChar getChar();
		void ungetChar(QChar);
		int getWord(QString&);
		void skipSpaces();
		void setTokenType(Token&);
		int getNumber(Value&, QString&);
		void getString(Token&);
	
		QTextIStream    *inputStream;
		Translate       *translate;
		uint             row, col, prevCol;
		QChar            putBackChar;
};


#endif // _LEXER_H_