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/*

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 * (c) 2003 Mario de Sousa

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 *

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 * Offered to the public under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version 2 of the

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 * License, or (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General

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 * Public License for more details.

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 *

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 * This code is made available on the understanding that it will not be

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 * used in safety-critical situations without a full and competent review.

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 */

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    17

/*

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 * An IEC 61131-3 IL and ST compiler.

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 *

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 * Based on the

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 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

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 *

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 */

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    25

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/*

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 * Code to be included into the code generated by the 4th stage.

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 *

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 * This is part of the 4th stage that generates

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 * a ST and IL source program equivalent to the IL and ST

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 * code.

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 * This is expected to be used mainly in debuging the syntax

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 * and lexical parser, and as a starting point for other

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 * 4th stages.

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 */

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// #include <stdio.h>  /* required for NULL */

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#include <string>

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#include <iostream>

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#include <sstream>

    46

#include <typeinfo>

    47

#include "generate_iec.hh"

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#include "../stage4.hh"

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//class generate_iec_c: public iterator_visitor_c {

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class generate_iec_c: public visitor_c {

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  private:

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    stage4out_c &s4o;

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    61

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  public:

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    generate_iec_c(stage4out_c *s4o_ptr): s4o(*s4o_ptr) {}

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    ~generate_iec_c(void) {}

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    66

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  private:

    68

    69

void *print_token(token_c *token) {

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  return s4o.print(token->value);

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}

    72

    73

void *print_literal(symbol_c *type, symbol_c *value) {

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  if (NULL != type) {

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    type->accept(*this);

    76

    s4o.print("#");

    77

  }

    78

  value->accept(*this);

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  return NULL;

    80

}

    81

    82

void *print_list(list_c *list,

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			       std::string pre_elem_str = "",

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			       std::string inter_elem_str = "",

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			       std::string post_elem_str = "") {

    86

  if (list->n > 0) {

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    s4o.print(pre_elem_str);

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    list->elements[0]->accept(*this);

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  }

    90

    91

  for(int i = 1; i < list->n; i++) {

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    s4o.print(inter_elem_str);

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    list->elements[i]->accept(*this);

    94

  }

    95

    96

  if (list->n > 0)

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    s4o.print(post_elem_str);

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    99

  return NULL;

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}

   101

   102

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void *print_binary_expression(symbol_c *l_exp,

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			      symbol_c *r_exp,

   105

			      const char *operation) {

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  s4o.print("(");

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  l_exp->accept(*this);

   108

  s4o.print(operation);

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  r_exp->accept(*this);

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  s4o.print(")");

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  return NULL;

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}

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void *print_unary_expression(symbol_c *exp,

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			     const char *operation) {

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  s4o.print(operation);

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  exp->accept(*this);

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  return NULL;

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}

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  public:

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   127

/*  EN/ENO */

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#if 0

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void *visit(en_param_c *symbol) {

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  s4o.print("EN");

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  return NULL;

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}

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void *visit(eno_param_c *symbol) {

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  s4o.print("ENO");

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  return NULL;

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}

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void *visit(en_param_c *symbol) {

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  return symbol->param_name->accept(*this);

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}

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void *visit(eno_param_c *symbol) {

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  return symbol->param_name->accept(*this);

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}

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#endif

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/***************************/

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/* 2.1.6 Pragmas */

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/***************************/

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void *visit(pragma_c *symbol) {return print_token(symbol);}

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/***************************/

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/* B 0 - Programming Model */

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/***************************/

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void *visit(library_c *symbol) {return print_list(symbol);}

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/*******************************************/

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/* B 1.1 - Letters, digits and identifiers */

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/*******************************************/

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void *visit(identifier_c *symbol) {return print_token(symbol);}

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/*********************/

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/* B 1.2 - Constants */

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/*********************/

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/******************************/

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/* B 1.2.1 - Numeric Literals */

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/******************************/

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void *visit(real_c *symbol)               {return print_token(symbol);}

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void *visit(neg_real_c *symbol)           {return print_unary_expression(symbol->exp, "-");}

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void *visit(integer_c *symbol)            {return print_token(symbol);}

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void *visit(neg_integer_c *symbol)        {return print_unary_expression(symbol->exp, "-");}

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void *visit(binary_integer_c *symbol)     {return print_token(symbol);}

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void *visit(octal_integer_c *symbol)      {return print_token(symbol);}

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void *visit(hex_integer_c *symbol)        {return print_token(symbol);}

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void *visit(integer_literal_c *symbol)    {return print_literal(symbol->type, symbol->value);}

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void *visit(real_literal_c *symbol)       {return print_literal(symbol->type, symbol->value);}

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void *visit(bit_string_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}

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void *visit(boolean_literal_c *symbol)    {return print_literal(symbol->type, symbol->value);}

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/* helper class for boolean_literal_c */

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void *visit(boolean_true_c *symbol)       {s4o.print(/*"TRUE"*/"1"); return NULL;}

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void *visit(boolean_false_c *symbol)      {s4o.print(/*"FALSE"*/"0"); return NULL;}

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/*******************************/

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/* B.1.2.2   Character Strings */

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/*******************************/

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void *visit(double_byte_character_string_c *symbol) {return print_token(symbol);}

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void *visit(single_byte_character_string_c *symbol) {return print_token(symbol);}

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/***************************/

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/* B 1.2.3 - Time Literals */

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/***************************/

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/************************/

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/* B 1.2.3.1 - Duration */

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/************************/

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void *visit(neg_time_c *symbol) {s4o.print("-"); return NULL;}

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void *visit(duration_c *symbol) {

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  s4o.print("TIME#");

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  if (symbol->neg != NULL)

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    symbol->neg->accept(*this);

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  symbol->interval->accept(*this);

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  return NULL;

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}

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void *visit(fixed_point_c *symbol) {return print_token(symbol);}

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void *visit(days_c *symbol) {

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  symbol->days->accept(*this);

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  s4o.print("d");

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  if (symbol->hours != NULL)

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    symbol->hours->accept(*this);

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  return NULL;

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}

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void *visit(hours_c *symbol) {

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  symbol->hours->accept(*this);

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  s4o.print("h");

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  if (symbol->minutes != NULL)

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    symbol->minutes->accept(*this);

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  return NULL;

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}

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void *visit(minutes_c *symbol) {

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  symbol->minutes->accept(*this);

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  s4o.print("m");

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  if (symbol->seconds != NULL)

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    symbol->seconds->accept(*this);

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  return NULL;

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}

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void *visit(seconds_c *symbol) {

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  symbol->seconds->accept(*this);

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  s4o.print("s");

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  if (symbol->milliseconds != NULL)

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    symbol->milliseconds->accept(*this);

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  return NULL;

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}

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void *visit(milliseconds_c *symbol) {

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  symbol->milliseconds->accept(*this);

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  s4o.print("ms");

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  return NULL;

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}

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/************************************/

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/* B 1.2.3.2 - Time of day and Date */

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/************************************/

   257

   258

void *visit(time_of_day_c *symbol) {

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  s4o.print("TIME_OF_DAY#");

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  symbol->daytime->accept(*this);

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  return NULL;

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}

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void *visit(daytime_c *symbol) {

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  symbol->day_hour->accept(*this);

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  s4o.print(":");

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  symbol->day_minute->accept(*this);

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  s4o.print(":");

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  symbol->day_second->accept(*this);

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  return NULL;

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}

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void *visit(date_c *symbol) {

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  s4o.print("DATE#");

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  symbol->date_literal->accept(*this);

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  return NULL;

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}

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void *visit(date_literal_c *symbol) {

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  symbol->year->accept(*this);

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  s4o.print("-");

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  symbol->month->accept(*this);

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  s4o.print("-");

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  symbol->day->accept(*this);

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  return NULL;

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}

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   289

void *visit(date_and_time_c *symbol) {

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  s4o.print("DATE_AND_TIME#");

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  symbol->date_literal->accept(*this);

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  s4o.print("-");

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  symbol->daytime->accept(*this);

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  return NULL;

   295

}

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/***********************************/

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/* B 1.3.1 - Elementary Data Types */

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/***********************************/

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void *visit(time_type_name_c *symbol)        {s4o.print("TIME");        return NULL;}

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void *visit(bool_type_name_c *symbol)        {s4o.print("BOOL");        return NULL;}

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void *visit(sint_type_name_c *symbol)        {s4o.print("SINT");        return NULL;}

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void *visit(int_type_name_c *symbol)         {s4o.print("INT");         return NULL;}

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void *visit(dint_type_name_c *symbol)        {s4o.print("DINT");        return NULL;}

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void *visit(lint_type_name_c *symbol)        {s4o.print("LINT");        return NULL;}

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void *visit(usint_type_name_c *symbol)       {s4o.print("USINT");       return NULL;}

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void *visit(uint_type_name_c *symbol)        {s4o.print("UINT");        return NULL;}

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void *visit(udint_type_name_c *symbol)       {s4o.print("UDINT");       return NULL;}

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void *visit(ulint_type_name_c *symbol)       {s4o.print("ULINT");       return NULL;}

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void *visit(real_type_name_c *symbol)        {s4o.print("REAL");        return NULL;}

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void *visit(lreal_type_name_c *symbol)       {s4o.print("LREAL");       return NULL;}

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void *visit(date_type_name_c *symbol)        {s4o.print("DATE");        return NULL;}

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void *visit(tod_type_name_c *symbol)         {s4o.print("TOD");         return NULL;}

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void *visit(dt_type_name_c *symbol)          {s4o.print("DT");          return NULL;}

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void *visit(byte_type_name_c *symbol)        {s4o.print("BYTE");        return NULL;}

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void *visit(word_type_name_c *symbol)        {s4o.print("WORD");        return NULL;}

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void *visit(lword_type_name_c *symbol)       {s4o.print("LWORD");       return NULL;}

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void *visit(dword_type_name_c *symbol)       {s4o.print("DWORD");       return NULL;}

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void *visit(string_type_name_c *symbol)      {s4o.print("STRING");      return NULL;}

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void *visit(wstring_type_name_c *symbol)     {s4o.print("WSTRING");     return NULL;}

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void *visit(safetime_type_name_c *symbol)    {s4o.print("SAFETIME");    return NULL;}

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void *visit(safebool_type_name_c *symbol)    {s4o.print("SAFEBOOL");    return NULL;}

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void *visit(safesint_type_name_c *symbol)    {s4o.print("SAFESINT");    return NULL;}

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void *visit(safeint_type_name_c *symbol)     {s4o.print("SAFEINT");     return NULL;}

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void *visit(safedint_type_name_c *symbol)    {s4o.print("SAFEDINT");    return NULL;}

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void *visit(safelint_type_name_c *symbol)    {s4o.print("SAFELINT");    return NULL;}

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void *visit(safeusint_type_name_c *symbol)   {s4o.print("SAFEUSINT");   return NULL;}

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void *visit(safeuint_type_name_c *symbol)    {s4o.print("SAFEUINT");    return NULL;}

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void *visit(safeudint_type_name_c *symbol)   {s4o.print("SAFEUDINT");   return NULL;}

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void *visit(safeulint_type_name_c *symbol)   {s4o.print("SAFEULINT");   return NULL;}

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void *visit(safereal_type_name_c *symbol)    {s4o.print("SAFEREAL");    return NULL;}

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void *visit(safelreal_type_name_c *symbol)   {s4o.print("SAFELREAL");   return NULL;}

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void *visit(safedate_type_name_c *symbol)    {s4o.print("SAFEDATE");    return NULL;}

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void *visit(safetod_type_name_c *symbol)     {s4o.print("SAFETOD");     return NULL;}

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void *visit(safedt_type_name_c *symbol)      {s4o.print("SAFEDT");      return NULL;}

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void *visit(safebyte_type_name_c *symbol)    {s4o.print("SAFEBYTE");    return NULL;}

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void *visit(safeword_type_name_c *symbol)    {s4o.print("SAFEWORD");    return NULL;}

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void *visit(safelword_type_name_c *symbol)   {s4o.print("SAFELWORD");   return NULL;}

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void *visit(safedword_type_name_c *symbol)   {s4o.print("SAFEDWORD");   return NULL;}

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void *visit(safestring_type_name_c *symbol)  {s4o.print("SAFESTRING");  return NULL;}

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void *visit(safewstring_type_name_c *symbol) {s4o.print("SAFEWSTRING"); return NULL;}

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/********************************/

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/* B 1.3.3 - Derived data types */

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/********************************/

   350

/*  TYPE type_declaration_list END_TYPE */

   351

void *visit(data_type_declaration_c *symbol) {

   352

  s4o.print("TYPE\n");

   353

  s4o.indent_right();

   354

  symbol->type_declaration_list->accept(*this);

   355

  s4o.indent_left();

   356

  s4o.print("END_TYPE\n\n\n");

   357

  return NULL;

   358

}

   359

   360

   361

/* helper symbol for data_type_declaration */

   362

/*| type_declaration_list type_declaration ';' */

   363

void *visit(type_declaration_list_c *symbol) {

   364

  return print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");

   365

}

   366

   367

   368

/*  simple_type_name ':' simple_spec_init */

   369

void *visit(simple_type_declaration_c *symbol) {

   370

  symbol->simple_type_name->accept(*this);

   371

  s4o.print(" : ");

   372

  symbol->simple_spec_init->accept(*this);

   373

  return NULL;

   374

}

   375

   376

/* simple_specification ASSIGN constant */

   377

void *visit(simple_spec_init_c *symbol) {

   378

  symbol->simple_specification->accept(*this);

   379

  if (symbol->constant != NULL) {

   380

    s4o.print(" := ");

   381

    symbol->constant->accept(*this);

   382

  }

   383

  return NULL;

   384

}

   385

   386

/*  subrange_type_name ':' subrange_spec_init */

   387

void *visit(subrange_type_declaration_c *symbol) {

   388

  symbol->subrange_type_name->accept(*this);

   389

  s4o.print(" : ");

   390

  symbol->subrange_spec_init->accept(*this);

   391

  return NULL;

   392

}

   393

   394

/* subrange_specification ASSIGN signed_integer */

   395

void *visit(subrange_spec_init_c *symbol) {

   396

  symbol->subrange_specification->accept(*this);

   397

  if (symbol->signed_integer != NULL) {

   398

    s4o.print(" := ");

   399

    symbol->signed_integer->accept(*this);

   400

  }

   401

  return NULL;

   402

}

   403

   404

/*  integer_type_name '(' subrange')' */

   405

void *visit(subrange_specification_c *symbol) {

   406

  symbol->integer_type_name->accept(*this);

   407

  if (symbol->subrange != NULL) {

   408

    s4o.print("(");

   409

    symbol->subrange->accept(*this);

   410

    s4o.print(")");

   411

  }

   412

  return NULL;

   413

}

   414

   415

/*  signed_integer DOTDOT signed_integer */

   416

void *visit(subrange_c *symbol) {

   417

  symbol->lower_limit->accept(*this);

   418

  s4o.print(" .. ");

   419

  symbol->upper_limit->accept(*this);

   420

  return NULL;

   421

}

   422

   423

/*  enumerated_type_name ':' enumerated_spec_init */

   424

void *visit(enumerated_type_declaration_c *symbol) {

   425

  symbol->enumerated_type_name->accept(*this);

   426

  s4o.print(" : ");

   427

  symbol->enumerated_spec_init->accept(*this);

   428

  return NULL;

   429

}

   430

   431

/* enumerated_specification ASSIGN enumerated_value */

   432

void *visit(enumerated_spec_init_c *symbol) {

   433

  symbol->enumerated_specification->accept(*this);

   434

  if (symbol->enumerated_value != NULL) {

   435

    s4o.print(" := ");

   436

    symbol->enumerated_value->accept(*this);

   437

  }

   438

  return NULL;

   439

}

   440

   441

/* helper symbol for enumerated_specification->enumerated_spec_init */

   442

/* enumerated_value_list ',' enumerated_value */

   443

void *visit(enumerated_value_list_c *symbol) {print_list(symbol, "(", ", ", ")"); return NULL;}

   444

   445

/* enumerated_type_name '#' identifier */

   446

void *visit(enumerated_value_c *symbol) {

   447

  if (symbol->type != NULL) {

   448

    symbol->type->accept(*this);

   449

    s4o.print("#");

   450

  }

   451

  symbol->value->accept(*this);

   452

  return NULL;

   453

}

   454

   455

/*  identifier ':' array_spec_init */

   456

void *visit(array_type_declaration_c *symbol) {

   457

  symbol->identifier->accept(*this);

   458

  s4o.print(" : ");

   459

  symbol->array_spec_init->accept(*this);

   460

  return NULL;

   461

}

   462

   463

/* array_specification [ASSIGN array_initialization} */

   464

/* array_initialization may be NULL ! */

   465

void *visit(array_spec_init_c *symbol) {

   466

  symbol->array_specification->accept(*this);

   467

  if (symbol->array_initialization != NULL) {

   468

    s4o.print(" := ");

   469

    symbol->array_initialization->accept(*this);

   470

  }

   471

  return NULL;

   472

}

   473

   474

/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */

   475

void *visit(array_specification_c *symbol) {

   476

  s4o.print("ARRAY [");

   477

  symbol->array_subrange_list->accept(*this);

   478

  s4o.print("] OF ");

   479

  symbol->non_generic_type_name->accept(*this);

   480

  return NULL;

   481

}

   482

   483

/* helper symbol for array_specification */

   484

/* array_subrange_list ',' subrange */

   485

void *visit(array_subrange_list_c *symbol) {print_list(symbol, "", ", "); return NULL;}

   486

   487

/* helper symbol for array_initialization */

   488

/* array_initial_elements_list ',' array_initial_elements */

   489

void *visit(array_initial_elements_list_c *symbol) {print_list(symbol, "[", ", ", "]"); return NULL;}

   490

   491

/* integer '(' [array_initial_element] ')' */

   492

/* array_initial_element may be NULL ! */

   493

void *visit(array_initial_elements_c *symbol) {

   494

  symbol->integer->accept(*this);

   495

  s4o.print("(");

   496

  if (symbol->array_initial_element != NULL)

   497

    symbol->array_initial_element->accept(*this);

   498

  s4o.print(")");

   499

  return NULL;

   500

}

   501

   502

/*  structure_type_name ':' structure_specification */

   503

void *visit(structure_type_declaration_c *symbol) {

   504

  symbol->structure_type_name->accept(*this);

   505

  s4o.print(" : ");

   506

  symbol->structure_specification->accept(*this);

   507

  return NULL;

   508

}

   509

   510

/* structure_type_name ASSIGN structure_initialization */

   511

/* structure_initialization may be NULL ! */

   512

void *visit(initialized_structure_c *symbol) {

   513

  symbol->structure_type_name->accept(*this);

   514

  if (symbol->structure_initialization != NULL) {

   515

    s4o.print(" := ");

   516

    symbol->structure_initialization->accept(*this);

   517

  }

   518

  return NULL;

   519

}

   520

   521

/* helper symbol for structure_declaration */

   522