lbessard@70: /*
lbessard@70:  * (c) 2007 Mario de Sousa and Laurent Bessard
lbessard@70:  *
lbessard@70:  * Offered to the public under the terms of the GNU General Public License
lbessard@70:  * as published by the Free Software Foundation; either version 2 of the
lbessard@70:  * License, or (at your option) any later version.
lbessard@70:  *
lbessard@70:  * This program is distributed in the hope that it will be useful, but
lbessard@70:  * WITHOUT ANY WARRANTY; without even the implied warranty of
lbessard@70:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
lbessard@70:  * Public License for more details.
lbessard@70:  *
lbessard@70:  * This code is made available on the understanding that it will not be
lbessard@70:  * used in safety-critical situations without a full and competent review.
lbessard@70:  */
lbessard@70: 
lbessard@70: /*
lbessard@70:  * An IEC 61131-3 IL and ST compiler.
lbessard@70:  *
lbessard@70:  * Based on the
lbessard@70:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
lbessard@70:  *
lbessard@70:  */
lbessard@70: 
lbessard@70: /*
lbessard@70:  * This is one of the versions available for the 4th stage.
lbessard@70:  *
lbessard@70:  * This 4th stage generates a c++ source program equivalent
lbessard@70:  * to the IL and ST code.
lbessard@70:  */
lbessard@70: 
lbessard@70: //#include <stdio.h>  /* required for NULL */
lbessard@70: //#include <string>
lbessard@70: //#include <iostream>
lbessard@70: 
lbessard@70: //#include "../../util/symtable.hh"
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: /***********************************************************************/
lbessard@70: 
lbessard@70: class generate_location_list_c: protected iterator_visitor_c {
lbessard@70: 
lbessard@70:   protected:
lbessard@70:     stage4out_c &s4o;
lbessard@70: 
lbessard@70:   private:
lbessard@70:     symbol_c *current_var_type_symbol;
lbessard@70:     generate_c_base_c *generate_c_base;
lbessard@70:     search_base_type_c search_base_type;
lbessard@70:     
lbessard@70:   public:
lbessard@70:     generate_location_list_c(stage4out_c *s4o_ptr): s4o(*s4o_ptr) {
lbessard@70:       generate_c_base = new generate_c_base_c(s4o_ptr);
lbessard@70:       current_var_type_symbol = NULL;
lbessard@70:     }
lbessard@70:     ~generate_location_list_c(void) {
lbessard@70:       delete generate_c_base;
lbessard@70:     }
lbessard@70: 
lbessard@70:     bool test_location_type(symbol_c *direct_variable) {
lbessard@70:       
lbessard@70:       token_c *location = dynamic_cast<token_c *>(direct_variable);
lbessard@70:       
lbessard@70:       if (location == NULL)
lbessard@70:         /* invalid identifiers... */
lbessard@70:         return false;
lbessard@70:       
lbessard@70:       switch (location->value[2]) {
lbessard@70:         case 'X': // bit
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(bool_type_name_c)) return true;
lbessard@70:           break;
lbessard@70:         case 'B': // Byte, 8 bits
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(sint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(usint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(string_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(byte_type_name_c)) return true;
lbessard@70:           break;
lbessard@70:         case 'W': // Word, 16 bits
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(int_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(uint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(word_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(wstring_type_name_c)) return true;
lbessard@70:           break;
lbessard@70:         case 'D': // Double, 32 bits
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(dint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(udint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(real_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(dword_type_name_c)) return true;
lbessard@70:           break;
lbessard@70:         case 'L': // Long, 64 bits
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(lint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(ulint_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(lreal_type_name_c)) return true;
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(lword_type_name_c)) return true;
lbessard@70:           break;
lbessard@70:         default:
lbessard@70:           if (typeid(*current_var_type_symbol) == typeid(bool_type_name_c)) return true;
lbessard@70:       }
lbessard@70:       return false;
lbessard@70:     }
lbessard@70: 
lbessard@70: /********************************************/
lbessard@70: /* B.1.4.1   Directly Represented Variables */
lbessard@70: /********************************************/
lbessard@70: 
lbessard@70:     void *visit(direct_variable_c *symbol) {
lbessard@70:       if (current_var_type_symbol) {
lbessard@70:         s4o.print("__LOCATED_VAR(");
lbessard@70:         current_var_type_symbol->accept(*generate_c_base);
lbessard@70:         s4o.print(",");
lbessard@70:         /* Do not use print_token() as it will change everything into uppercase */
lbessard@70:         s4o.printlocation((symbol->value)+1);
lbessard@70:         s4o.print(",");
lbessard@70:         s4o.printlocation_comasep((symbol->value)+1);
lbessard@70:         s4o.print(")\n");
lbessard@70:       }
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /********************************************/
lbessard@70: /* B.1.4.3   Declaration and initilization  */
lbessard@70: /********************************************/
lbessard@70: 
lbessard@70: /*  [variable_name] location ':' located_var_spec_init */
lbessard@70: /* variable_name -> may be NULL ! */
lbessard@70: //SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
lbessard@70:     void *visit(located_var_decl_c *symbol) {
lbessard@70:         current_var_type_symbol = spec_init_sperator_c::get_spec(symbol->located_var_spec_init);
lbessard@70:         if (current_var_type_symbol == NULL)
lbessard@70:           ERROR;
lbessard@70:         
lbessard@70:         current_var_type_symbol = (symbol_c *)(current_var_type_symbol->accept(search_base_type));
lbessard@70:         if (current_var_type_symbol == NULL)
lbessard@70:           ERROR;
lbessard@70:         
lbessard@70:         symbol->location->accept(*this);
lbessard@70:         
lbessard@70:         current_var_type_symbol = NULL;
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
lbessard@70: /* type_specification ->may be NULL ! */
lbessard@70: //SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
lbessard@70:     void *visit(global_var_decl_c *symbol) {
lbessard@70:         current_var_type_symbol = spec_init_sperator_c::get_spec(symbol->type_specification);
lbessard@70:         if (current_var_type_symbol == NULL)
lbessard@70:           ERROR;
lbessard@70:         
lbessard@70:         current_var_type_symbol = (symbol_c *)(current_var_type_symbol->accept(search_base_type));
lbessard@70:         if (current_var_type_symbol == NULL)
lbessard@70:           ERROR;
lbessard@70:         
lbessard@70:         symbol->global_var_spec->accept(*this);
lbessard@70:         
lbessard@70:         current_var_type_symbol = NULL;
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  AT direct_variable */
lbessard@70: //SYM_REF2(location_c, direct_variable, unused)
lbessard@70:     void *visit(location_c *symbol) {
lbessard@70:       if (test_location_type(symbol->direct_variable))
lbessard@70:         symbol->direct_variable->accept(*this); 
lbessard@70:       else
lbessard@70:         ERROR;
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: }; /* generate_location_list_c */