File indexing completed on 2024-05-12 15:26:59

 /***************************************************************************
     File                 : parser.h
     Project              : LabPlot
     Description          : Parser for mathematical expressions
     --------------------------------------------------------------------
     Copyright            : (C) 2014-2020 Stefan Gerlach  (stefan.gerlach@uni.kn)
     Copyright            : (C) 2014 Alexander Semke (alexander.semke@web.de)
 
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *  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                                           *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PARSER_H
 #define PARSER_H
 
 /* uncomment to enable parser specific debugging */
 /* #define PDEBUG 1 */
 
 struct cons {
     const char* name;
     double value;
 };
 
 struct funs {
     const char* name;
 #ifdef _MSC_VER /* MSVC needs void argument */
     double (*fnct)(void);
 #else
     double (*fnct)();
 #endif
     int argc;
 };
 
 /* variables to pass to parser */
 #define MAX_VARNAME_LENGTH 10
 typedef struct parser_var {
     char name[MAX_VARNAME_LENGTH];
     double value;
 } parser_var;
 
 /* Function types */
 #ifdef _MSC_VER /* MSVC needs void argument */
 typedef double (*func_t) (void);
 #else
 typedef double (*func_t) ();
 #endif
 typedef double (*func_t1) (double);
 typedef double (*func_t2) (double, double);
 typedef double (*func_t3) (double, double, double);
 typedef double (*func_t4) (double, double, double, double);
 
 /* structure for list of symbols */
 typedef struct symbol {
     char *name; /* name of symbol */
     int type;   /* type of symbol: either VAR or FNCT */
     union {
         double var; /* value of a VAR */
         func_t fnctptr; /* value of a FNCT */
     } value;
     struct symbol *next;    /* next symbol */
 } symbol;
 
 void init_table(void);      /* initialize symbol table */
 void delete_table(void);    /* delete symbol table */
 int parse_errors(void);
 symbol* assign_symbol(const char* symbol_name, double value);
 int remove_symbol(const char* symbol_name);
 double parse(const char *string, const char *locale);
 double parse_with_vars(const char[], const parser_var[], int nvars, const char* locale);
 
 extern struct cons _constants[];
 extern struct funs _functions[];
 
 
 #endif /*PARSER_H*/