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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.

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 */

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#include <stdlib.h>

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class generate_c_typedecl_c: public generate_c_base_c {

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  protected:

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    stage4out_c &s4o_incl;

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  private:

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    symbol_c* current_type_name;

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    bool array_is_derived;

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    generate_c_base_c *basedecl;

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  public:

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    generate_c_typedecl_c(stage4out_c *s4o_ptr, stage4out_c *s4o_incl_ptr): generate_c_base_c(s4o_ptr), s4o_incl(*s4o_incl_ptr) {

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      current_typedefinition = none_td;

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      current_basetypedeclaration = none_bd;

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      current_type_name = NULL;

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      basedecl = new generate_c_base_c(&s4o_incl);

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    }

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    generate_c_typedecl_c(stage4out_c *s4o_ptr): generate_c_base_c(s4o_ptr), s4o_incl(*s4o_ptr) {

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      current_typedefinition = none_td;

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      current_basetypedeclaration = none_bd;

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      current_type_name = NULL;

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      basedecl = new generate_c_base_c(&s4o_incl);

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    }

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    ~generate_c_typedecl_c(void) {

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      delete basedecl;

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    }

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    typedef enum {

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      none_td,

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      enumerated_td,

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      subrange_td,

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      array_td,

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      struct_td

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    } typedefinition_t;

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    typedefinition_t current_typedefinition;

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    typedef enum {

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      none_bd,

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      subrangebasetype_bd,

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      subrangetest_bd,

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      arrayderiveddeclaration_bd,

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      arraybasetype_bd,

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      arraybasetypeincl_bd,

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      arraysubrange_bd

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    } basetypedeclaration_t;

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    basetypedeclaration_t current_basetypedeclaration;

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    void *print_list_incl(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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         visitor_c *visitor = NULL) {

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      if (visitor == NULL) visitor = this;

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      if (list->n > 0) {

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//std::cout << "generate_c_base_c::print_list(n = " << list->n << ")   000\n";

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        s4o_incl.print(pre_elem_str);

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

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      }

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

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//std::cout << "generate_c_base_c::print_list   " << i << "\n";

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        s4o_incl.print(inter_elem_str);

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

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      }

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      if (list->n > 0)

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        s4o_incl.print(post_elem_str);

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      return NULL;

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    }

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

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/* B 0 - Programming Model */

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

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  /* leave for derived classes... */

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

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/* B.1 - Common elements */

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

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

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

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

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  /* done in base class(es) */

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

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/* B 1.2 - Constants */

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

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  /* originally empty... */

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

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/* B 1.2.1 - Numeric Literals */

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

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  /* done in base class(es) */

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

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/* B.1.2.2   Character Strings */

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

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  /* done in base class(es) */

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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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  /* done in base class(es) */

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

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

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

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  /* done in base class(es) */

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

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/* B.1.3 - Data types */

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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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  /* done in base class(es) */

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

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/* B.1.3.2 - Generic data types */

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

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  /* originally empty... */

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

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/* B 1.3.3 - Derived data types */

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

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/*  subrange_type_name ':' subrange_spec_init */

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void *visit(subrange_type_declaration_c *symbol) {

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  TRACE("subrange_type_declaration_c");  

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  current_typedefinition = subrange_td;

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  current_type_name = symbol->subrange_type_name;

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  s4o_incl.print("__DECLARE_DERIVED_TYPE(");

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  current_type_name->accept(*basedecl);

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  s4o_incl.print(",");

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  current_basetypedeclaration = subrangebasetype_bd;

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

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  current_basetypedeclaration = none_bd;

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  s4o_incl.print(")\n");

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  current_basetypedeclaration = subrangetest_bd;

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

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  current_basetypedeclaration = none_bd;

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  current_type_name = NULL;

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  current_typedefinition = none_td;

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  return NULL;

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}

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/* subrange_specification ASSIGN signed_integer */

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void *visit(subrange_spec_init_c *symbol) {

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  TRACE("subrange_spec_init_c");

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

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  return NULL;

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}

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

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void *visit(subrange_specification_c *symbol) {

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  if (current_typedefinition == subrange_td) {

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    switch (current_basetypedeclaration) {

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      case subrangebasetype_bd:

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

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        break;

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      case subrangetest_bd:

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        if (symbol->subrange != NULL) {

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          if (get_datatype_info_c::is_subrange(symbol->integer_type_name)) {

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

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          }

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

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        }

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        else {

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        }

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        break;

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      default:

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        break;

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    }

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  }

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  else {

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

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  }

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  return NULL;

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}

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/*  signed_integer DOTDOT signed_integer */

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void *visit(subrange_c *symbol) {

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  int dimension;

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  switch (current_typedefinition) {

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    case array_td:

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      if (current_basetypedeclaration == arraysubrange_bd) {

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        s4o_incl.print("[");

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        s4o_incl.print(symbol->dimension);

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        s4o_incl.print("]");

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      }

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      else

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

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      break;

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    case subrange_td:

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    default:

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      break;

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  }

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  return NULL;

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}

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/*  enumerated_type_name ':' enumerated_spec_init */

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void *visit(enumerated_type_declaration_c *symbol) {

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  TRACE("enumerated_type_declaration_c");

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  current_typedefinition = enumerated_td;

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  current_type_name = symbol->enumerated_type_name;

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  s4o_incl.print("__DECLARE_ENUMERATED_TYPE(");

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  current_type_name->accept(*basedecl);

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  s4o_incl.print(",\n");

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  s4o_incl.indent_right();

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

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  s4o_incl.indent_left();

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  s4o_incl.print(")\n");

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  current_type_name = NULL;

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  current_typedefinition = none_td;

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  return NULL;

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}

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/* enumerated_specification ASSIGN enumerated_value */

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void *visit(enumerated_spec_init_c *symbol) {

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  TRACE("enumerated_spec_init_c");

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  if (current_typedefinition == enumerated_td)

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

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  else

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

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  return NULL;

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}

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/* helper symbol for enumerated_specification->enumerated_spec_init */

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/* enumerated_value_list ',' enumerated_value */

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void *visit(enumerated_value_list_c *symbol) {

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  print_list_incl(symbol, s4o_incl.indent_spaces, ",\n"+s4o_incl.indent_spaces, "\n");

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  return NULL;

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}

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/* enumerated_type_name '#' identifier */

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void *visit(enumerated_value_c *symbol) {

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  if (current_typedefinition == enumerated_td)

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    current_type_name->accept(*basedecl);

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  else {

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    if (NULL == symbol->datatype) {

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      debug_c::print(symbol);

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      ERROR;

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    }

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    symbol_c *type_name = get_datatype_info_c::get_id(symbol->datatype);

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    if (NULL == type_name) {

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//       ERROR_MSG("generate_c does not support anonymous enumerated data types.");

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    } else

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    type_name->accept(*basedecl);

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  }

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  s4o_incl.print("__");

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

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  return NULL;

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}

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/*  identifier ':' array_spec_init */

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void *visit(array_type_declaration_c *symbol) {

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  TRACE("array_type_declaration_c");

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  current_typedefinition = array_td;

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  current_type_name = symbol->identifier;

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  array_is_derived = false;

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  current_basetypedeclaration = arrayderiveddeclaration_bd;

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

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  current_basetypedeclaration = none_bd;

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  if (array_is_derived)

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    s4o_incl.print("__DECLARE_DERIVED_TYPE(");

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  else

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    s4o_incl.print("__DECLARE_ARRAY_TYPE(");

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  current_type_name->accept(*basedecl);

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  s4o_incl.print(",");

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  current_basetypedeclaration = arraybasetypeincl_bd;

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

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  current_basetypedeclaration = none_bd;

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  if (!array_is_derived) {

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    s4o_incl.print(",");

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    current_basetypedeclaration = arraysubrange_bd;

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

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    current_basetypedeclaration = none_bd;

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  }

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  s4o_incl.print(")\n");

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  current_type_name = NULL;

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  current_typedefinition = none_td;

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  return NULL;

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}

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/* array_specification [ASSIGN array_initialization] */

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/* array_initialization may be NULL ! */

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void *visit(array_spec_init_c *symbol) {

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  TRACE("array_spec_init_c");

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  if (current_typedefinition == array_td) {

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    switch (current_basetypedeclaration) {

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      case arrayderiveddeclaration_bd:

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        array_is_derived = dynamic_cast<identifier_c *>(symbol->array_specification) != NULL;

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        break;

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      default:

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        if (array_is_derived)

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

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        else

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

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        break;

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    }

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  }

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  else {

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

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  }

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  return NULL;

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}

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

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void *visit(array_specification_c *symbol) {

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  switch (current_basetypedeclaration) {

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    case arraybasetype_bd:

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

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      break;

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    case arraybasetypeincl_bd:

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

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      break;

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    case arraysubrange_bd:

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

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      break;

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    default:

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      break;

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  }

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  return NULL;

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}

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/* helper symbol for array_specification */

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/* array_subrange_list ',' subrange */

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void *visit(array_subrange_list_c *symbol) {

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  print_list(symbol);

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  return NULL;

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}

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   433

/*  TYPE type_declaration_list END_TYPE */

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void *visit(data_type_declaration_c *symbol) {

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  TRACE("data_type_declaration_c");

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

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  s4o_incl.print("\n\n");

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  return NULL;

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}

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/* helper symbol for data_type_declaration */

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void *visit(type_declaration_list_c *symbol) {

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  TRACE("type_declaration_list_c");

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  return print_list_incl(symbol, "", "\n", "\n");

   445

}

   446

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/*  simple_type_name ':' simple_spec_init */

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void *visit(simple_type_declaration_c *symbol) {

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  TRACE("simple_type_declaration_c");

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   451

  s4o_incl.print("__DECLARE_DERIVED_TYPE(");

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

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  s4o_incl.print(",");

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

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  s4o_incl.print(")\n");

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   457

  if (get_datatype_info_c::is_subrange(symbol->simple_type_name)) {

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

   463

  }

   464

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  return NULL;

   466

}

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   468

/* simple_specification [ASSIGN constant] */

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//SYM_REF2(simple_spec_init_c, simple_specification, constant)

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// <constant> may be NULL

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void *visit(simple_spec_init_c *symbol) {

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  TRACE("simple_spec_init_c");

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

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  return NULL;

   475

}

   476

   477

#if 0

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/*  subrange_type_name ':' subrange_spec_init */

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SYM_REF2(subrange_type_declaration_c, subrange_type_name, subrange_spec_init)

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/* subrange_specification ASSIGN signed_integer */

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SYM_REF2(subrange_spec_init_c, subrange_specification, signed_integer)

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   484

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

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SYM_REF2(subrange_specification_c, integer_type_name, subrange)

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   487

/*  signed_integer DOTDOT signed_integer */

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SYM_REF2(subrange_c, lower_limit, upper_limit)

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   490

/*  enumerated_type_name ':' enumerated_spec_init */

   491

SYM_REF2(enumerated_type_declaration_c, enumerated_type_name, enumerated_spec_init)

   492

   493

/* enumerated_specification ASSIGN enumerated_value */

   494

SYM_REF2(enumerated_spec_init_c, enumerated_specification, enumerated_value)