source: code/branches/lod/src/util/ExprParser.h @ 2908

/*
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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__ */