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/*

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 *  matiec - a compiler for the programming languages defined in IEC 61131-3

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 *

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 *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)

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 *

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 *  This program is free software: you can redistribute it and/or modify

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 *  it under the terms of the GNU General Public License as published by

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 *  the Free Software Foundation, either version 3 of the License, or

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 *  (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,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License

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 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

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 *

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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.

    22

 */

    23

    24

/*

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 * An IEC 61131-3 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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    32

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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>

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#include <typeinfo>

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#include "generate_iec.hh"

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#include "../stage4.hh"

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    58

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    60

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    63

//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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  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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    73

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  private:

    75

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void *print_token(token_c *token) {

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  return s4o.print(token->value);

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}

    79

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

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  if (NULL != type) {

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    type->accept(*this);

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    s4o.print("#");

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  }

    85

  value->accept(*this);

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  return NULL;

    87

}

    88

    89

void *print_list(list_c *list,

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			       std::string pre_elem_str = "",

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			       std::string inter_elem_str = "",

    92

			       std::string post_elem_str = "") {

    93

  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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  }

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  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);

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  }

   102

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  if (list->n > 0)

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    s4o.print(post_elem_str);

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  return NULL;

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}

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void *print_binary_expression(symbol_c *l_exp,

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			      symbol_c *r_exp,

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			      const char *operation) {

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  s4o.print("(");

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  l_exp->accept(*this);

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  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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}

   120

   121

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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   134

/*  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(enable_code_generation_pragma_c*)  {s4o.print("{enable code generation}");  return NULL;}

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void *visit(disable_code_generation_pragma_c*) {s4o.print("{disable code generation}"); return NULL;}

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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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}

   222

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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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}

   232

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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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   249

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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}

   256

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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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   263

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

   264

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

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

   266

   267

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;

   287

}

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void *visit(date_literal_c *symbol) {

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

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  s4o.print("-");

   292

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

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  s4o.print("-");

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

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  return NULL;

   296

}

   297

   298

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;

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}

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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;}

   317

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;}

   327

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;}

   337

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;}

   346

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;}

   348

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;}

   351

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 */

   358

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

   359

/*  TYPE type_declaration_list END_TYPE */

   360

void *visit(data_type_declaration_c *symbol) {

   361

  s4o.print("TYPE\n");

   362

  s4o.indent_right();

   363

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

   364

  s4o.indent_left();

   365

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

   366

  return NULL;

   367

}

   368

   369

   370

/* helper symbol for data_type_declaration */

   371

/*| type_declaration_list type_declaration ';' */

   372

void *visit(type_declaration_list_c *symbol) {

   373

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

   374

}

   375

   376

   377

/*  simple_type_name ':' simple_spec_init */

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void *visit(simple_type_declaration_c *symbol) {

   379

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

   380

  s4o.print(" : ");

   381

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

   382

  return NULL;

   383

}

   384

   385

/* simple_specification ASSIGN constant */

   386

void *visit(simple_spec_init_c *symbol) {

   387

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

   388

  if (symbol->constant != NULL) {

   389

    s4o.print(" := ");

   390

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

   391

  }

   392

  return NULL;

   393

}

   394

   395

/*  subrange_type_name ':' subrange_spec_init */

   396

void *visit(subrange_type_declaration_c *symbol) {

   397

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

   398

  s4o.print(" : ");

   399

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

   400

  return NULL;

   401

}

   402

   403

/* subrange_specification ASSIGN signed_integer */

   404

void *visit(subrange_spec_init_c *symbol) {

   405

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

   406

  if (symbol->signed_integer != NULL) {

   407

    s4o.print(" := ");

   408

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

   409

  }

   410

  return NULL;

   411

}

   412

   413

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

   414

void *visit(subrange_specification_c *symbol) {

   415

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

   416

  if (symbol->subrange != NULL) {

   417

    s4o.print("(");

   418

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

   419

    s4o.print(")");

   420

  }

   421

  return NULL;

   422

}

   423

   424

/*  signed_integer DOTDOT signed_integer */

   425

void *visit(subrange_c *symbol) {

   426

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

   427

  s4o.print(" .. ");

   428

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

   429

  return NULL;

   430

}

   431

   432

/*  enumerated_type_name ':' enumerated_spec_init */

   433

void *visit(enumerated_type_declaration_c *symbol) {

   434

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

   435

  s4o.print(" : ");

   436

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

   437

  return NULL;

   438

}

   439

   440

/* enumerated_specification ASSIGN enumerated_value */

   441

void *visit(enumerated_spec_init_c *symbol) {

   442

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

   443

  if (symbol->enumerated_value != NULL) {

   444

    s4o.print(" := ");

   445

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

   446

  }

   447

  return NULL;

   448

}

   449

   450

/* helper symbol for enumerated_specification->enumerated_spec_init */

   451

/* enumerated_value_list ',' enumerated_value */

   452

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

   453

   454

/* enumerated_type_name '#' identifier */

   455

void *visit(enumerated_value_c *symbol) {

   456

  if (symbol->type != NULL) {

   457

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

   458

    s4o.print("#");

   459

  }

   460

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

   461

  return NULL;

   462

}

   463

   464

/*  identifier ':' array_spec_init */

   465

void *visit(array_type_declaration_c *symbol) {

   466

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

   467

  s4o.print(" : ");

   468

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

   469

  return NULL;

   470

}

   471

   472

/* array_specification [ASSIGN array_initialization} */

   473

/* array_initialization may be NULL ! */

   474

void *visit(array_spec_init_c *symbol) {

   475

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

   476

  if (symbol->array_initialization != NULL) {

   477

    s4o.print(" := ");

   478

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

   479

  }

   480

  return NULL;

   481

}

   482

   483

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

   484

void *visit(array_specification_c *symbol) {

   485

  s4o.print("ARRAY [");

   486

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

   487

  s4o.print("] OF ");

   488

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

   489

  return NULL;

   490

}

   491

   492

/* helper symbol for array_specification */

   493

/* array_subrange_list ',' subrange */

   494

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

   495

   496

/* helper symbol for array_initialization */

   497

/* array_initial_elements_list ',' array_initial_elements */

   498

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

   499

   500

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

   501

/* array_initial_element may be NULL ! */

   502

void *visit(array_initial_elements_c *symbol) {

   503

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

   504

  s4o.print("(");

   505

  if (symbol->array_initial_element != NULL)

   506

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

   507

  s4o.print(")");

   508

  return NULL;

   509

}

   510

   511

/*  structure_type_name ':' structure_specification */

   512

void *visit(structure_type_declaration_c *symbol) {

   513

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

   514

  s4o.print(" : ");

   515

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

   516

  return NULL;

   517

}

   518

   519

/* structure_type_name ASSIGN structure_initialization */