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// $Id: lexer.hpp 848 2006-10-29 02:14:04Z coz $
//
// TuxKart - a fun racing game with go-kart
// Copyright (C) 2004 Matthias Braun <matze@braunis.de>
// code in this file based on lispreader from Mark Probst
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#ifndef __LISPLEXER_H__
#define __LISPLEXER_H__
namespace lisp
{
class Lexer
{
public:
enum TokenType
{
TOKEN_EOF,
TOKEN_OPEN_PAREN,
TOKEN_CLOSE_PAREN,
TOKEN_SYMBOL,
TOKEN_STRING,
TOKEN_INTEGER,
TOKEN_REAL,
TOKEN_TRUE,
TOKEN_FALSE
};
Lexer(std::istream& stream);
~Lexer();
TokenType getNextToken();
const char* getString() const
{ return m_token_string; }
int getLineNumber() const
{ return m_line_number; }
private:
enum
{
MAX_TOKEN_LENGTH = 4096,
LEXER_BUFFER_SIZE = 1024
};
inline void nextChar();
std::istream& m_stream;
bool m_is_eof;
int m_line_number;
char m_buffer[LEXER_BUFFER_SIZE+1];
char* m_buffer_end;
char* m_c;
char m_token_string[MAX_TOKEN_LENGTH + 1];
int m_token_length;
};
} // end of namespace lisp
#endif
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