source: code/branches/shader/src/util/ExprParser.h @ 2274

/*
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 *   License notice:
 *
 *   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Reto Grieder
 *   Co-authors:
 *      ...
 *
 */

/**
  @file
  @brief Declaration of FloatParser
*/

#ifndef _FloatParser_H__
#define _FloatParser_H__

#include "UtilPrereqs.h"
#include <string>

class _UtilExport ExprParser
{
public:
  enum binary_operator
  {
    b_plus,
    b_minus,
    mal,
    durch,
    modulo,
    hoch,
    undef,
    oder,
    und,
    gleich,
    b_nicht,
    kleiner,
    groesser,
    ungleich,
    kleinergleich,
    groessergleich
  };

  enum unary_operator
  {
    u_plus,
    u_minus,
    u_nicht
  };


  ExprParser(const std::string& str);
  std::string& getRemains() { return  this->remains_; }
  double       getResult()  { return  this->result_; }
  bool         getSuccess() { return !this->failed_; }

private:
  double parse_expr_1();
  double parse_expr_2();
  double parse_expr_3();
  double parse_expr_4();
  double parse_expr_5();
  double parse_expr_6();
  double parse_expr_7();
  double parse_expr_8();
  char* parse_word(char* str);
  binary_operator parse_binary_operator();
  unary_operator parse_unary_operator();

  double parse_argument();
  double parse_last_argument();

  binary_operator op;
  const char* reading_stream;
  bool failed_;
  double result_;
  std::string remains_;

};

//Endzeichen für float expression: ')', '}', ']', ',', ';'
_UtilExport bool parse_float(char* const, char**, double*);
//Endzeichen angegeben
_UtilExport bool parse_float(char* const, char**, char, double*);
//Letzter Teil-float eines Vektors parsen (keine Vergleichs- und Logikoperationen)
_UtilExport bool parse_vector_float(char* const, char**, bool, double*);

#endif /* _FloatParser_H__ */