etisserant@0: /*
etisserant@0:  * (c) 2003 Mario de Sousa
etisserant@0:  *
etisserant@0:  * Offered to the public under the terms of the GNU General Public License
etisserant@0:  * as published by the Free Software Foundation; either version 2 of the
etisserant@0:  * License, or (at your option) any later version.
etisserant@0:  *
etisserant@0:  * This program is distributed in the hope that it will be useful, but
etisserant@0:  * WITHOUT ANY WARRANTY; without even the implied warranty of
etisserant@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
etisserant@0:  * Public License for more details.
etisserant@0:  *
etisserant@0:  * This code is made available on the understanding that it will not be
etisserant@0:  * used in safety-critical situations without a full and competent review.
etisserant@0:  */
etisserant@0: 
etisserant@0: /*
etisserant@0:  * An IEC 61131-3 IL and ST compiler.
etisserant@0:  *
etisserant@0:  * Based on the
etisserant@0:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
etisserant@0:  *
etisserant@0:  */
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: /* Determine the data type of a specific constant or variable.
etisserant@0:  * A reference to the relevant type definition is returned.
etisserant@0:  *
etisserant@0:  * For example:
etisserant@0:  *       22          -> returns reference to a int_type_name_c object.
etisserant@0:  *       22.2        -> returns reference to a real_type_name_c object.
etisserant@0:  *       LREAL#22.2  -> returns reference to a lreal_type_name_c object.
etisserant@0:  *       etc...
etisserant@0:  */
etisserant@0: class search_constant_type_c: public search_visitor_c {
etisserant@0: 
etisserant@0:   public:
etisserant@0: /**********************/
etisserant@0: /* B.1.3 - Data types */
etisserant@0: /**********************/
etisserant@0: /***********************************/
etisserant@0: /* B 1.3.1 - Elementary Data Types */
etisserant@0: /***********************************/
etisserant@0:   static real_type_name_c     real_type_name;
etisserant@0:   static int_type_name_c      int_type_name;
etisserant@0:   static string_type_name_c   string_type_name;
etisserant@0:   static wstring_type_name_c  wstring_type_name;
etisserant@0:   static time_type_name_c     time_type_name;
etisserant@0:   static date_type_name_c     date_type_name;
etisserant@0:   static dt_type_name_c       dt_type_name;
etisserant@0:   static tod_type_name_c      tod_type_name;
etisserant@0: 
etisserant@0: 
etisserant@0:   public:
etisserant@0:     symbol_c *get_type(symbol_c *constant) {
etisserant@0:       return (symbol_c *)constant->accept(*this);
etisserant@0:     }
etisserant@0: 
etisserant@0:   public:
etisserant@0: /*********************/
etisserant@0: /* B 1.2 - Constants */
etisserant@0: /*********************/
etisserant@0: 
etisserant@0: /******************************/
etisserant@0: /* B 1.2.1 - Numeric Literals */
etisserant@0: /******************************/
etisserant@0:     void *visit(real_c *symbol) {return (void *)&real_type_name;}
etisserant@0:     void *visit(integer_c *symbol) {return (void *)&int_type_name;}
etisserant@0:     void *visit(binary_integer_c *symbol) {return (void *)&int_type_name;}
etisserant@0:     void *visit(octal_integer_c *symbol) {return (void *)&int_type_name;}
etisserant@0:     void *visit(hex_integer_c *symbol) {return (void *)&int_type_name;}
etisserant@0: 
etisserant@0:     void *visit(numeric_literal_c *symbol)
etisserant@0:       {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
etisserant@0:     void *visit(integer_literal_c *symbol)
etisserant@0:       {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
etisserant@0:     void *visit(real_literal_c *symbol)
etisserant@0:       {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
etisserant@0:     void *visit(bit_string_literal_c *symbol)
etisserant@0:       {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
etisserant@0:     void *visit(boolean_literal_c *symbol)
etisserant@0:       {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
etisserant@0: 
etisserant@0: /*******************************/
etisserant@0: /* B.1.2.2   Character Strings */
etisserant@0: /*******************************/
etisserant@0:     void *visit(double_byte_character_string_c *symbol) {return (void *)&wstring_type_name;}
etisserant@0:     void *visit(single_byte_character_string_c *symbol) {return (void *)&string_type_name;}
etisserant@0: 
etisserant@0: /***************************/
etisserant@0: /* B 1.2.3 - Time Literals */
etisserant@0: /***************************/
etisserant@0: /************************/
etisserant@0: /* B 1.2.3.1 - Duration */
etisserant@0: /************************/
etisserant@0:     void *visit(neg_time_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(duration_c *symbol) {return (void *)&time_type_name;}
etisserant@0:     void *visit(fixed_point_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(days_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(hours_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(minutes_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(seconds_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(milliseconds_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0: 
etisserant@0: /************************************/
etisserant@0: /* B 1.2.3.2 - Time of day and Date */
etisserant@0: /************************************/
etisserant@0:     void *visit(time_of_day_c *symbol) {return (void *)&tod_type_name;}
etisserant@0:     void *visit(daytime_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(date_c *symbol) {return (void *)&date_type_name;}
etisserant@0:     void *visit(date_literal_c *symbol) {ERROR; return NULL;}  /* this member function should never be called. */
etisserant@0:     void *visit(date_and_time_c *symbol) {return (void *)&dt_type_name;}
etisserant@0: };
etisserant@0: 
etisserant@0: real_type_name_c     search_constant_type_c::real_type_name;
etisserant@0: int_type_name_c      search_constant_type_c::int_type_name;
etisserant@0: string_type_name_c   search_constant_type_c::string_type_name;
etisserant@0: wstring_type_name_c  search_constant_type_c::wstring_type_name;
etisserant@0: time_type_name_c     search_constant_type_c::time_type_name;
etisserant@0: date_type_name_c     search_constant_type_c::date_type_name;
etisserant@0: dt_type_name_c       search_constant_type_c::dt_type_name;
etisserant@0: tod_type_name_c      search_constant_type_c::tod_type_name;
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: