lbessard@70: /*
lbessard@70:  * (c) 2003 Mario de Sousa
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: /*
lbessard@70:  * Conversion of basic abstract syntax constructs.
lbessard@70:  *
lbessard@70:  * This is part of the 4th stage that generates
lbessard@70:  * a c++ source program equivalent to the IL and ST
lbessard@70:  * code.
lbessard@70:  */
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
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: //#include "generate_c.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: class generate_c_base_c: public iterator_visitor_c {
lbessard@70: 
lbessard@70:   protected:
lbessard@70:     stage4out_c &s4o;
lbessard@70: 
lbessard@70:   private:
lbessard@70:     /* Unlike programs that are mapped onto C++ classes, Function Blocks are mapped onto a data structure type
lbessard@70:      * and a separate function conatining the code. This function is passed a pointer to an instance of the data
lbessard@70:      * structure. This means that the code inside the functions must insert a pointer to the data structure whenever
lbessard@70:      * it wishes to access a Function Block variable.
lbessard@70:      * The variable_prefix_ variable will contain the correct string which needs to be prefixed to all variable accesses.
lbessard@70:      * This string is set with the set_variable_prefix() member function.
lbessard@70:      */
lbessard@70:     const char *variable_prefix_;
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70:   public:
lbessard@70:     generate_c_base_c(stage4out_c *s4o_ptr): s4o(*s4o_ptr) {variable_prefix_ = NULL;}
lbessard@70:     ~generate_c_base_c(void) {}
lbessard@70: 
lbessard@70:     void set_variable_prefix(const char *variable_prefix) {variable_prefix_ = variable_prefix;}
lbessard@70:     void print_variable_prefix(void) {
lbessard@70:       if (variable_prefix_ != NULL)
lbessard@70:         s4o.print(variable_prefix_);
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_token(token_c *token, int offset = 0) {
lbessard@70:       return s4o.printupper((token->value)+offset);
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_literal(symbol_c *type, symbol_c *value) {
lbessard@70:       s4o.print("__");
lbessard@70:       type->accept(*this);
lbessard@70:       s4o.print("_LITERAL(");
lbessard@70:       value->accept(*this);
lbessard@70:       s4o.print(")");
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_striped_token(token_c *token, int offset = 0) {
lbessard@70:       std::string str = "";
lbessard@70:       for (unsigned int i = offset; i < strlen(token->value); i++)
lbessard@70:         if (token->value[i] != '_')
lbessard@70:           str += token->value[i];
lbessard@70:       return s4o.printupper(str);
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_striped_binary_token(token_c *token, unsigned int offset = 0) {
lbessard@70:       /* convert the binary value to hexadecimal format... */
lbessard@70:       unsigned char value, bit_mult;
lbessard@70:       unsigned int i;
lbessard@70:       int total_bits;
lbessard@70:       char str[2] = {'A', '\0'};  /* since the s4o object is not prepared to print out one character at a time... */
lbessard@70: 
lbessard@70:       s4o.print("0x");
lbessard@70: 
lbessard@70:       total_bits = 0;
lbessard@70:       for (i = offset; i < strlen(token->value); i++)
lbessard@70:         if (token->value[i] != '_')
lbessard@70: 	  total_bits++;
lbessard@70: 
lbessard@70:       value = 0;
lbessard@70:       bit_mult = (unsigned char)1 << (((total_bits+3)%4)+1);
lbessard@70:       for (i = offset; i < strlen(token->value); i++) {
lbessard@70:         if (token->value[i] != '_') {
lbessard@70: 	  bit_mult /= 2;
lbessard@70: 	  value += bit_mult * ((token->value[i] == '0')? 0:1);
lbessard@70: 	  if (bit_mult == 1) {
lbessard@70: 	    str[0] = (value <= 9)? (char)'0' + value : (char)'A' + value;
lbessard@70: 	    s4o.print(str);
lbessard@70:             bit_mult = 0x10;
lbessard@70:             value = 0;
lbessard@70: 	  }
lbessard@70: 	}
lbessard@70:       }
lbessard@70: 
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_list(list_c *list,
lbessard@70: 		     std::string pre_elem_str = "",
lbessard@70: 		     std::string inter_elem_str = "",
lbessard@70: 		     std::string post_elem_str = "",
lbessard@70: 		     visitor_c *visitor = NULL) {
lbessard@70:       if (visitor == NULL) visitor = this;
lbessard@70: 
lbessard@70:       if (list->n > 0) {
lbessard@70: //std::cout << "generate_c_base_c::print_list(n = " << list->n << ")   000\n";
lbessard@70:         s4o.print(pre_elem_str);
lbessard@70:         list->elements[0]->accept(*visitor);
lbessard@70:       }
lbessard@70: 
lbessard@70:       for(int i = 1; i < list->n; i++) {
lbessard@70: //std::cout << "generate_c_base_c::print_list   " << i << "\n";
lbessard@70:         s4o.print(inter_elem_str);
lbessard@70:         list->elements[i]->accept(*visitor);
lbessard@70:       }
lbessard@70: 
lbessard@70:       if (list->n > 0)
lbessard@70:         s4o.print(post_elem_str);
lbessard@70: 
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70:     void *print_binary_expression(symbol_c *l_exp,
lbessard@70: 				  symbol_c *r_exp,
lbessard@70: 				  const char *operation) {
lbessard@70:       s4o.print("(");
lbessard@70:       l_exp->accept(*this);
lbessard@70:       s4o.print(operation);
lbessard@70:       r_exp->accept(*this);
lbessard@70:       s4o.print(")");
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_unary_expression(symbol_c *exp,
lbessard@70: 				 const char *operation) {
lbessard@70:       s4o.print(operation);
lbessard@70:       s4o.print("(");
lbessard@70:       exp->accept(*this);
lbessard@70:       s4o.print(")");
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *print_binary_function(const char *function,
lbessard@70:           symbol_c *l_exp,
lbessard@70: 				  symbol_c *r_exp) {
lbessard@70:       s4o.print(function);
lbessard@70:       s4o.print("(");
lbessard@70:       l_exp->accept(*this);
lbessard@70:       s4o.print(", ");
lbessard@70:       r_exp->accept(*this);
lbessard@70:       s4o.print(")");
lbessard@70:       return NULL;
lbessard@70:    	}
lbessard@70: 
lbessard@70:     void *print_compare_function(const char *function,
lbessard@70:           symbol_c *compare_type,
lbessard@70:           symbol_c *l_exp,
lbessard@70:           symbol_c *r_exp) {
lbessard@70:       s4o.print(function);
lbessard@70:       compare_type->accept(*this);
lbessard@70:       s4o.print("(2, ");
lbessard@70:       l_exp->accept(*this);
lbessard@70:       s4o.print(", ");
lbessard@70:       r_exp->accept(*this);
lbessard@70:       s4o.print(")");
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /***************************/
lbessard@70: /* 2.1.6 - Pragmas */
lbessard@70: /***************************/
lbessard@70:     /* Do not use print_token() as it will change everything into uppercase */
lbessard@70:     void *visit(pragma_c *symbol) {return s4o.print(symbol->value);}
lbessard@70: 
lbessard@70: 
lbessard@70: /***************************/
lbessard@70: /* B 0 - Programming Model */
lbessard@70: /***************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /*************************/
lbessard@70: /* B.1 - Common elements */
lbessard@70: /*************************/
lbessard@70: /*******************************************/
lbessard@70: /* B 1.1 - Letters, digits and identifiers */
lbessard@70: /*******************************************/
lbessard@70:     void *visit(identifier_c *symbol) {return print_token(symbol);}
lbessard@70: 
lbessard@70: /*********************/
lbessard@70: /* B 1.2 - Constants */
lbessard@70: /*********************/
lbessard@70:   /* originally empty... */
lbessard@70: 
lbessard@70: /******************************/
lbessard@70: /* B 1.2.1 - Numeric Literals */
lbessard@70: /******************************/
lbessard@70:     void *visit(real_c *symbol) {return print_striped_token(symbol);}
lbessard@70:     void *visit(integer_c *symbol) {return print_striped_token(symbol);}
lbessard@70:     void *visit(binary_integer_c *symbol) {return print_striped_binary_token(symbol, 2);}
lbessard@70:     void *visit(octal_integer_c *symbol) {s4o.print("0"); return print_striped_token(symbol, 2);}
lbessard@70:     void *visit(hex_integer_c *symbol) {s4o.print("0x"); return print_striped_token(symbol, 3);}
lbessard@70: 
lbessard@70:     void *visit(numeric_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
lbessard@70:     void *visit(integer_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
lbessard@70:     void *visit(real_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
lbessard@70:     void *visit(bit_string_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
lbessard@70:     void *visit(boolean_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
lbessard@70: 
lbessard@70:     /* helper class for boolean_literal_c */
lbessard@70:     void *visit(boolean_true_c *symbol) {s4o.print("TRUE"); return NULL;}
lbessard@70:     void *visit(boolean_false_c *symbol) {s4o.print("FALSE"); return NULL;}
lbessard@70: 
lbessard@98:     void *visit(neg_expression_c *symbol) {
lbessard@98:       s4o.print("-");
lbessard@98:       symbol->exp->accept(*this);
lbessard@98:       return NULL;
lbessard@98:     }
lbessard@98: 
lbessard@70: /*******************************/
lbessard@70: /* B.1.2.2   Character Strings */
lbessard@70: /*******************************/
lbessard@70:     void *visit(double_byte_character_string_c *symbol) {
lbessard@70:       // TO DO ...
lbessard@70:       ERROR;
lbessard@70:       return print_token(symbol);
lbessard@70:     }
lbessard@70: 
lbessard@70:     void *visit(single_byte_character_string_c *symbol) {
lbessard@70:       std::string str = "";
lbessard@70:       unsigned int count = 0; 
lbessard@70:       str += '"';
lbessard@70:       /* we ignore the first and last bytes, they will be the character ' */
lbessard@70:       for (unsigned int i = 1; i < strlen(symbol->value) - 1; i++) {
lbessard@70:         char c = symbol->value[i];
lbessard@70:         if ((c == '\\') || (c == '"'))
lbessard@70:           {str += '\\'; str += c; count ++; continue;}
lbessard@70:         if (c != '$')
lbessard@70:           {str += c; count++; continue;}
lbessard@70:         /* this should be safe, since the code has passed the syntax parser!! */
lbessard@70:         c = symbol->value[++i];
lbessard@70:         switch (c) {
lbessard@70:           case '$':
lbessard@70:           case '\'':
lbessard@70:             {str += c; count++; continue;}
lbessard@70:           case 'L':
lbessard@70:           case 'l':
lbessard@70:             {str += "\x0A"; /* LF */; count++; continue;}
lbessard@70:           case 'N':
lbessard@70:           case 'n':
lbessard@70:             {str += "\\x0A"; /* NL */; count++; continue;}
lbessard@70:           case 'P':
lbessard@70:           case 'p':
lbessard@70:             {str += "\\f"; /* FF */; count++; continue;}
lbessard@70:           case 'R':
lbessard@70:           case 'r':
lbessard@70:             {str += "\\r"; /* CR */; count++; continue;}
lbessard@70:           case 'T':
lbessard@70:           case 't':
lbessard@70:             {str += "\\t"; /* tab */; count++; continue;}
lbessard@70:           default: {
lbessard@70:             if (isxdigit(c)) {
lbessard@70:               /* this should be safe, since the code has passed the syntax parser!! */
lbessard@70: 	      char c2 = symbol->value[++i];
lbessard@70: 	      if (isxdigit(c2)) {
lbessard@70: 	        str += '\\'; str += 'x'; str += c; str += c2;
lbessard@70: 	        count++; continue;
lbessard@70: 	      }
lbessard@70: 	    }
lbessard@70:           }
lbessard@70:           /* otherwise we have an invalid string!! */
lbessard@70:           /* This should not have got through the syntax parser! */
lbessard@70:           ERROR;
lbessard@70:         } /* switch() */
lbessard@70:       } /* for() */
lbessard@70: 
lbessard@70:       str += '"';
lbessard@70:       s4o.print("(STRING){");
lbessard@70:       s4o.print_integer(count); 
lbessard@70:       s4o.print(",");
lbessard@70:       s4o.print(str);
lbessard@70:       s4o.print("}");
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /***************************/
lbessard@70: /* B 1.2.3 - Time Literals */
lbessard@70: /***************************/
lbessard@70: 
lbessard@70: /************************/
lbessard@70: /* B 1.2.3.1 - Duration */
lbessard@70: /************************/
lbessard@70: /* The following output is actually the parameters to the constructor of the TIME class! */
lbessard@70: 
lbessard@70: /* SYM_REF0(neg_time_c) */
lbessard@70: void *visit(neg_time_c *symbol) {s4o.print("-1"); /* negative time value */; return NULL;}
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(duration_c, neg, interval) */
lbessard@70: void *visit(duration_c *symbol) {
lbessard@70:   TRACE("duration_c");
lbessard@70:   s4o.print("__time_to_timespec(");
lbessard@70:   if (NULL == symbol->neg)
lbessard@70:     s4o.print("1");  /* positive time value */
lbessard@70:   else
lbessard@70:     symbol->neg->accept(*this);  /* this will print '-1'   :-) */
lbessard@70: 
lbessard@70:   s4o.print(", ");
lbessard@70: 
lbessard@70:   symbol->interval->accept(*this);
lbessard@70:   if (typeid(*symbol->interval) == typeid(hours_c)) {s4o.print(", 0");}
lbessard@70:   if (typeid(*symbol->interval) == typeid(minutes_c)) {s4o.print(", 0, 0");}
lbessard@70:   if (typeid(*symbol->interval) == typeid(seconds_c)) {s4o.print(", 0, 0, 0");}
lbessard@70:   if (typeid(*symbol->interval) == typeid(milliseconds_c)) {s4o.print(", 0, 0, 0, 0");}
lbessard@70:   s4o.print(")");
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_TOKEN(fixed_point_c) */
lbessard@70: void *visit(fixed_point_c *symbol) {return print_token(symbol);}
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(days_c, days, hours) */
lbessard@70: void *visit(days_c *symbol) {
lbessard@70:   TRACE("days_c");
lbessard@70:   if (NULL == symbol->hours)
lbessard@70:     s4o.print("0, 0, 0, 0");  /* milliseconds, seconds, minutes, hours */
lbessard@70:   else
lbessard@70:     symbol->hours->accept(*this);
lbessard@70: 
lbessard@70:   s4o.print(", ");
lbessard@70: 
lbessard@70:   symbol->days->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(hours_c, hours, minutes) */
lbessard@70: void *visit(hours_c *symbol) {
lbessard@70:   TRACE("hours_c");
lbessard@70:   if (NULL == symbol->minutes)
lbessard@70:     s4o.print("0, 0, 0");  /* milliseconds, seconds, minutes */
lbessard@70:   else
lbessard@70:     symbol->minutes->accept(*this);
lbessard@70: 
lbessard@70:   s4o.print(", ");
lbessard@70: 
lbessard@70:   symbol->hours->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(minutes_c, minutes, seconds) */
lbessard@70: void *visit(minutes_c *symbol) {
lbessard@70:   TRACE("minutes_c");
lbessard@70:   if (NULL == symbol->seconds)
lbessard@70:     s4o.print("0, 0");  /* milliseconds, seconds */
lbessard@70:   else
lbessard@70:     symbol->seconds->accept(*this);
lbessard@70: 
lbessard@70:   s4o.print(", ");
lbessard@70: 
lbessard@70:   symbol->minutes->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(seconds_c, seconds, milliseconds) */
lbessard@70: void *visit(seconds_c *symbol) {
lbessard@70:   TRACE("seconds_c");
lbessard@70:   if (NULL == symbol->milliseconds)
lbessard@70:     s4o.print("0");  /* milliseconds */
lbessard@70:   else
lbessard@70:     symbol->milliseconds->accept(*this);
lbessard@70: 
lbessard@70:   s4o.print(", ");
lbessard@70: 
lbessard@70:   symbol->seconds->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(milliseconds_c, milliseconds, unused) */
lbessard@70: void *visit(milliseconds_c *symbol) {
lbessard@70:   TRACE("milliseconds_c");
lbessard@70:   symbol->milliseconds->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: /************************************/
lbessard@70: /* B 1.2.3.2 - Time of day and Date */
lbessard@70: /************************************/
lbessard@70: 
lbessard@70: /* SYM_REF2(time_of_day_c, daytime, unused) */
lbessard@70: void *visit(time_of_day_c *symbol) {
lbessard@70:   TRACE("time_of_day_c");
lbessard@70:   s4o.print("__tod_to_timespec(");
lbessard@70:   symbol->daytime->accept(*this);
lbessard@70:   s4o.print(")");
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF4(daytime_c, day_hour, day_minute, day_second, unused) */
lbessard@70: void *visit(daytime_c *symbol) {
lbessard@70:   TRACE("daytime_c");
lbessard@70:   symbol->day_second->accept(*this);
lbessard@70:   s4o.print(", ");
lbessard@70:   symbol->day_minute->accept(*this);
lbessard@70:   s4o.print(", ");
lbessard@70:   symbol->day_hour->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(date_c, date_literal, unused) */
lbessard@70: void *visit(date_c *symbol) {
lbessard@70:   TRACE("date_c");
lbessard@70:   s4o.print("__date_to_timespec(");
lbessard@70:   symbol->date_literal->accept(*this);
lbessard@70:   s4o.print(")");
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF4(date_literal_c, year, month, day, unused) */
lbessard@70: void *visit(date_literal_c *symbol) {
lbessard@70:   TRACE("date_literal_c");
lbessard@70:   symbol->day->accept(*this);
lbessard@70:   s4o.print(", ");
lbessard@70:   symbol->month->accept(*this);
lbessard@70:   s4o.print(", ");
lbessard@70:   symbol->year->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /* SYM_REF2(date_and_time_c, date_literal, daytime) */
lbessard@70: void *visit(date_and_time_c *symbol) {
lbessard@70:   TRACE("date_and_time_c");
lbessard@70:   s4o.print("__dt_to_timespec(");
lbessard@70:   symbol->daytime->accept(*this);
lbessard@70:   s4o.print(", ");
lbessard@70:   symbol->date_literal->accept(*this);
lbessard@70:   s4o.print(")");
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: /**********************/
lbessard@70: /* B.1.3 - Data types */
lbessard@70: /**********************/
lbessard@70: /***********************************/
lbessard@70: /* B 1.3.1 - Elementary Data Types */
lbessard@70: /***********************************/
lbessard@70:     void *visit(time_type_name_c *symbol) {s4o.print("TIME"); return NULL;}
lbessard@70:     void *visit(bool_type_name_c *symbol) {s4o.print("BOOL"); return NULL;}
lbessard@70:     void *visit(sint_type_name_c *symbol) {s4o.print("SINT"); return NULL;}
lbessard@70:     void *visit(int_type_name_c *symbol) {s4o.print("INT"); return NULL;}
lbessard@70:     void *visit(dint_type_name_c *symbol) {s4o.print("DINT"); return NULL;}
lbessard@70:     void *visit(lint_type_name_c *symbol) {s4o.print("LINT"); return NULL;}
lbessard@70:     void *visit(usint_type_name_c *symbol) {s4o.print("USINT"); return NULL;}
lbessard@70:     void *visit(uint_type_name_c *symbol) {s4o.print("UINT"); return NULL;}
lbessard@70:     void *visit(udint_type_name_c *symbol) {s4o.print("UDINT"); return NULL;}
lbessard@70:     void *visit(ulint_type_name_c *symbol) {s4o.print("ULINT"); return NULL;}
lbessard@70:     void *visit(real_type_name_c *symbol) {s4o.print("REAL"); return NULL;}
lbessard@70:     void *visit(lreal_type_name_c *symbol) {s4o.print("LREAL"); return NULL;}
lbessard@70:     void *visit(date_type_name_c *symbol) {s4o.print("DATE"); return NULL;}
lbessard@70:     void *visit(tod_type_name_c *symbol) {s4o.print("TOD"); return NULL;}
lbessard@70:     void *visit(dt_type_name_c *symbol) {s4o.print("DT"); return NULL;}
lbessard@70:     void *visit(byte_type_name_c *symbol) {s4o.print("BYTE"); return NULL;}
lbessard@70:     void *visit(word_type_name_c *symbol) {s4o.print("WORD"); return NULL;}
lbessard@70:     void *visit(lword_type_name_c *symbol) {s4o.print("LWORD"); return NULL;}
lbessard@70:     void *visit(dword_type_name_c *symbol) {s4o.print("DWORD"); return NULL;}
lbessard@70:     void *visit(string_type_name_c *symbol) {s4o.print("STRING"); return NULL;}
lbessard@70:     void *visit(wstring_type_name_c *symbol) {s4o.print("WSTRING"); return NULL;}
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B.1.3.2 - Generic data types */
lbessard@70: /********************************/
lbessard@70:   /* originally empty... */
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B 1.3.3 - Derived data types */
lbessard@70: /********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*********************/
lbessard@70: /* B 1.4 - Variables */
lbessard@70: /*********************/
lbessard@70: void *visit(symbolic_variable_c *symbol) {
lbessard@70:   TRACE("symbolic_variable_c");
lbessard@70:   this->print_variable_prefix();
lbessard@70:   symbol->var_name->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: /********************************************/
lbessard@70: /* B.1.4.1   Directly Represented Variables */
lbessard@70: /********************************************/
lbessard@70: void *visit(direct_variable_c *symbol) {
lbessard@70:   TRACE("direct_variable_c");
lbessard@70:   /* Do not use print_token() as it will change everything into uppercase */
lbessard@70:   return s4o.printlocation(symbol->value);
lbessard@70: }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /*************************************/
lbessard@70: /* B.1.4.2   Multi-element Variables */
lbessard@70: /*************************************/
lbessard@70: #if 0
lbessard@70: /*  subscripted_variable '[' subscript_list ']' */
lbessard@70: SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
lbessard@70: 
lbessard@70: #endif
lbessard@70: 
lbessard@70: /*  record_variable '.' field_selector */
lbessard@70: /*  WARNING: input and/or output variables of function blocks
lbessard@70:  *           may be accessed as fields of a structured variable!
lbessard@70:  *           Code handling a structured_variable_c must take
lbessard@70:  *           this into account!
lbessard@70:  */
lbessard@70: // SYM_REF2(structured_variable_c, record_variable, field_selector)
lbessard@70: void *visit(structured_variable_c *symbol) {
lbessard@70:   TRACE("structured_variable_c");
lbessard@70: 
lbessard@70:   symbol->record_variable->accept(*this);
lbessard@70:   s4o.print(".");
lbessard@70:   symbol->field_selector->accept(*this);
lbessard@70:   return NULL;
lbessard@70: }
lbessard@70: 
lbessard@70: /******************************************/
lbessard@70: /* B 1.4.3 - Declaration & Initialisation */
lbessard@70: /******************************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /**************************************/
lbessard@70: /* B.1.5 - Program organization units */
lbessard@70: /**************************************/
lbessard@70: /***********************/
lbessard@70: /* B 1.5.1 - Functions */
lbessard@70: /***********************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*****************************/
lbessard@70: /* B 1.5.2 - Function Blocks */
lbessard@70: /*****************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /**********************/
lbessard@70: /* B 1.5.3 - Programs */
lbessard@70: /**********************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*********************************************/
lbessard@70: /* B.1.6  Sequential function chart elements */
lbessard@70: /*********************************************/
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B 1.7 Configuration elements */
lbessard@70: /********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /****************************************/
lbessard@70: /* B.2 - Language IL (Instruction List) */
lbessard@70: /****************************************/
lbessard@70: /***********************************/
lbessard@70: /* B 2.1 Instructions and Operands */
lbessard@70: /***********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*******************/
lbessard@70: /* B 2.2 Operators */
lbessard@70: /*******************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: 
lbessard@70: /***************************************/
lbessard@70: /* B.3 - Language ST (Structured Text) */
lbessard@70: /***************************************/
lbessard@70: /***********************/
lbessard@70: /* B 3.1 - Expressions */
lbessard@70: /***********************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /********************/
lbessard@70: /* B 3.2 Statements */
lbessard@70: /********************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*********************************/
lbessard@70: /* B 3.2.1 Assignment Statements */
lbessard@70: /*********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /*****************************************/
lbessard@70: /* B 3.2.2 Subprogram Control Statements */
lbessard@70: /*****************************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B 3.2.3 Selection Statements */
lbessard@70: /********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B 3.2.4 Iteration Statements */
lbessard@70: /********************************/
lbessard@70:   /* leave for derived classes... */
lbessard@70: 
lbessard@70: }; /* class generate_c_basic_c */
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: