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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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 *  Copyright (C) 2007-2011  Laurent Bessard and Edouard Tisserant

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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.

    23

 */

    24

    25

/*

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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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/*

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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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/* Compile with the following option, to print out the const_value of each symbol, which was filled in by constant_folding_c during stage3 */

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// #define DEBUG_CONST_VALUE

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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>

    57

#include "generate_iec.hh"

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#include "../stage4.hh"

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#include "../../main.hh" // required for ERROR() and ERROR_MSG() macros.

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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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  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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    93

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  private:

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    96

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void print_const_value(symbol_c *symbol) {

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#ifdef DEBUG_CONST_VALUE

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  if (NULL == symbol) return;

   100

  bool first = true;

   101

   102

  if (NULL != symbol->const_value_uint64) {

   103

    first?s4o.print("{"):s4o.print("; ");

   104

    first = false;

   105

    s4o.print("uint64:");

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    if (symbol->const_value_uint64->status == symbol_c::cs_const_value)

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      s4o.print_uint64(symbol->const_value_uint64->value);

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    if (symbol->const_value_uint64->status == symbol_c::cs_overflow)

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    s4o.print("OVERFLOW");

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  }

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  if (NULL != symbol->const_value_int64) {

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    first?s4o.print("{"):s4o.print("; ");

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    first = false;

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    s4o.print("int64:");

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    if (symbol->const_value_int64->status == symbol_c::cs_const_value)

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      s4o.print_int64(symbol->const_value_int64->value);

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    if (symbol->const_value_int64->status == symbol_c::cs_overflow)

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    s4o.print("OVERFLOW");

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  }

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  if (NULL != symbol->const_value_real64) {

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    first?s4o.print("{"):s4o.print("; ");

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    first = false;

   123

    s4o.print("real64:");

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    if (symbol->const_value_real64->status == symbol_c::cs_const_value)

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      s4o.print_real64(symbol->const_value_real64->value);

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    if (symbol->const_value_real64->status == symbol_c::cs_overflow)

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    s4o.print("OVERFLOW");

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  }

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  if (NULL != symbol->const_value_bool) {

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    first?s4o.print("{"):s4o.print("; ");

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    first = false;

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    s4o.print("bool:");

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    if (symbol->const_value_bool->status == symbol_c::cs_const_value)

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      s4o.print((symbol->const_value_bool->value)?"true":"false");

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    if (symbol->const_value_bool->status == symbol_c::cs_overflow)

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    s4o.print("OVERFLOW");

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  }

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  if (!first) s4o.print("}");  

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#endif

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  return;

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}

   142

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void *print_token(token_c *token) {

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  print_const_value(token);

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  return s4o.print(token->value);

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}

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

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  print_const_value(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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  }

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  value->accept(*this);

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  return NULL;

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}

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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 = "") {

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  if (list->n > 0) {

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    s4o.print(pre_elem_str);

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

   168

  }

   169

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

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    s4o.print(inter_elem_str);

   172

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

   173

  }

   174

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  if (list->n > 0)

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    s4o.print(post_elem_str);

   177

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  return NULL;

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}

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void *print_binary_expression(symbol_c *symbol,

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			      symbol_c *l_exp,

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			      symbol_c *r_exp,

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			      const char *operation) {

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  print_const_value(symbol);

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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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}

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void *print_unary_expression(symbol_c *symbol,

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			     symbol_c *exp,

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			     const char *operation) {

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  print_const_value(symbol);

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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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/*  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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/* A class used to identify an entry (literal, variable, etc...) in the abstract syntax tree with an invalid data type */

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/* This is only used from stage3 onwards. Stages 1 and 2 will never create any instances of invalid_type_name_c */

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// SYM_REF0(invalid_type_name_c)

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void *visit(invalid_type_name_c *symbol) {

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  ERROR;

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  return NULL;

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}

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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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   247

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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, 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, 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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/*******************************/

   285

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;

   304

}

   305

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

   307

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/* SYM_REF5(interval_c, days, hours, minutes, seconds, milliseconds) */

   309

void *visit(interval_c *symbol) {

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  if (NULL != symbol->days) {

   311

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

   312

    s4o.print("d");

   313

  }

   314

   315

  if (NULL != symbol->hours) {

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

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    s4o.print("h");

   318

  }

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   320

  if (NULL != symbol->minutes) {

   321

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

   322

    s4o.print("m");

   323

  }

   324

   325

  if (NULL != symbol->seconds) {

   326

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

   327

    s4o.print("s");

   328

  }

   329

   330

  if (NULL != symbol->milliseconds) {

   331

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

   332

    s4o.print("ms");

   333

  }

   334

   335

  return NULL;

   336

}

   337

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   339

   340

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

   341

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

   342

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

   343

   344

void *visit(time_of_day_c *symbol) {

   345

  s4o.print("TIME_OF_DAY#");

   346

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

   347

  return NULL;

   348

}

   349

   350

void *visit(daytime_c *symbol) {

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

   352

  s4o.print(":");

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

   354

  s4o.print(":");

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

   356

  return NULL;

   357

}

   358

   359

   360

void *visit(date_c *symbol) {

   361

  s4o.print("DATE#");

   362

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

   363

  return NULL;

   364

}

   365

   366

void *visit(date_literal_c *symbol) {

   367

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

   368

  s4o.print("-");

   369

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

   370

  s4o.print("-");

   371

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

   372

  return NULL;

   373

}

   374

   375

void *visit(date_and_time_c *symbol) {

   376

  s4o.print("DATE_AND_TIME#");

   377

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

   378

  s4o.print("-");

   379

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

   380

  return NULL;

   381

}

   382

   383

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

   386

/* B 1.3.1 - Elementary Data Types */

   387

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

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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;}

   393

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

   394

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

   395

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

   396

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;}

   400

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;}

   403

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

   404

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

   405

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

   406

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

   407

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

   408

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

   409

   410

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

   411

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;}

   413

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

   414

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

   415

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

   416

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

   417

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

   418

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

   419

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

   420

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

   421

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

   422

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

   423

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

   424

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

   425

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

   426

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

   427

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

   428

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

   429

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

   430

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

   431

   432

   433

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

   434

/* B 1.3.3 - Derived data types */

   435

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

   436

/*  TYPE type_declaration_list END_TYPE */

   437

void *visit(data_type_declaration_c *symbol) {

   438

  s4o.print("TYPE\n");

   439

  s4o.indent_right();

   440

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

   441

  s4o.indent_left();

   442

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

   443

  return NULL;

   444

}

   445

   446

   447

/* helper symbol for data_type_declaration */

   448

/*| type_declaration_list type_declaration ';' */

   449

void *visit(type_declaration_list_c *symbol) {

   450

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

   451

}

   452

   453

   454

/*  simple_type_name ':' simple_spec_init */

   455

void *visit(simple_type_declaration_c *symbol) {

   456

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

   457

  s4o.print(" : ");

   458

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

   459

  return NULL;

   460

}

   461

   462

/* simple_specification ASSIGN constant */

   463

void *visit(simple_spec_init_c *symbol) {

   464

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

   465

  if (symbol->constant != NULL) {

   466

    s4o.print(" := ");

   467

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

   468

  }

   469

  return NULL;

   470

}

   471

   472

/*  subrange_type_name ':' subrange_spec_init */

   473

void *visit(subrange_type_declaration_c *symbol) {

   474

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

   475

  s4o.print(" : ");

   476

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

   477

  return NULL;

   478

}

   479

   480

/* subrange_specification ASSIGN signed_integer */

   481

void *visit(subrange_spec_init_c *symbol) {

   482

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

   483

  if (symbol->signed_integer != NULL) {

   484

    s4o.print(" := ");

   485

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

   486

  }

   487

  return NULL;

   488

}

   489

   490

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

   491

void *visit(subrange_specification_c *symbol) {

   492

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

   493

  if (symbol->subrange != NULL) {

   494

    s4o.print("(");

   495

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

   496

    s4o.print(")");

   497

  }

   498

  return NULL;

   499

}

   500

   501

/*  signed_integer DOTDOT signed_integer */

   502

void *visit(subrange_c *symbol) {

   503

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

   504

  s4o.print(" .. ");

   505

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

   506

  return NULL;

   507

}

   508

   509

/*  enumerated_type_name ':' enumerated_spec_init */

   510

void *visit(enumerated_type_declaration_c *symbol) {