msousa@417: /*
msousa@417:  *  matiec - a compiler for the programming languages defined in IEC 61131-3
msousa@417:  *
msousa@417:  *  Copyright (C) 2009-2012  Mario de Sousa (msousa@fe.up.pt)
msousa@417:  *  Copyright (C) 2012       Manuele Conti  (conti.ma@alice.it)
msousa@417:  *
msousa@417:  *  This program is free software: you can redistribute it and/or modify
msousa@417:  *  it under the terms of the GNU General Public License as published by
msousa@417:  *  the Free Software Foundation, either version 3 of the License, or
msousa@417:  *  (at your option) any later version.
msousa@417:  *
msousa@417:  *  This program is distributed in the hope that it will be useful,
msousa@417:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
msousa@417:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
msousa@417:  *  GNU General Public License for more details.
msousa@417:  *
msousa@417:  *  You should have received a copy of the GNU General Public License
msousa@417:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
msousa@417:  *
msousa@417:  *
msousa@417:  * This code is made available on the understanding that it will not be
msousa@417:  * used in safety-critical situations without a full and competent review.
msousa@417:  */
msousa@417: 
msousa@417: #include "datatype_functions.hh"
msousa@417: #include "../absyntax_utils/absyntax_utils.hh"
msousa@417: 
msousa@417: /*
msousa@417:  * 2.5.1.5.6 Functions of time data types
msousa@417:  * Table 30 - page 64
msousa@417:  */
msousa@417: 
msousa@417: const struct widen_entry widen_ADD_table[] = {
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::time_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetod_type_name  },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safedt_type_name   },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetime_type_name,        &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetod_type_name  },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safetime_type_name,        &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safedt_type_name   },
msousa@417:     { NULL, NULL, NULL },
msousa@417: };
msousa@417: 
msousa@417: 
msousa@417: const struct widen_entry widen_SUB_table[] = {
msousa@417: 	{ &search_constant_type_c::time_type_name,          &search_constant_type_c::time_type_name,            &search_constant_type_c::time_type_name     },
msousa@417: 	{ &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::tod_type_name      },
msousa@417: 	{ &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::dt_type_name       },
msousa@417: 	{ &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417: 	{ &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetod_type_name  },
msousa@417: 	{ &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safedt_type_name   },
msousa@417: 
msousa@417: 	{ &search_constant_type_c::tod_type_name,           &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetime_type_name,        &search_constant_type_c::tod_type_name      },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetod_type_name  },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safetime_type_name,        &search_constant_type_c::dt_type_name       },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safedt_type_name   },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::tod_type_name,             &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetod_type_name,         &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::date_type_name,          &search_constant_type_c::date_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safedate_type_name,      &search_constant_type_c::date_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::date_type_name,          &search_constant_type_c::safedate_type_name,        &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safedate_type_name,      &search_constant_type_c::safedate_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::dt_type_name,              &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safedt_type_name,          &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safetime_type_name },
msousa@417:     { NULL, NULL, NULL },
msousa@417: };
msousa@417: 
msousa@417: const struct widen_entry widen_MUL_table[] = {
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::lreal_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::real_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::dint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::int_type_name,             &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::sint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::ulint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::udint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::uint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::usint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417: 
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::lreal_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::real_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::dint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::int_type_name,             &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::sint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::ulint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::udint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::uint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::usint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417: 
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safelreal_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safereal_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safedint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeint_type_name,         &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safesint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeulint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeudint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeuint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeusint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417: 
msousa@417:     { NULL, NULL, NULL },
msousa@417: };
msousa@417: 
msousa@417: const struct widen_entry widen_DIV_table[] = {
msousa@417: 	{ &search_constant_type_c::time_type_name,          &search_constant_type_c::lreal_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::real_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::dint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::int_type_name,             &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::sint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::ulint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::udint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::uint_type_name,            &search_constant_type_c::time_type_name     },
msousa@417:     { &search_constant_type_c::time_type_name,          &search_constant_type_c::usint_type_name,           &search_constant_type_c::time_type_name     },
msousa@417: 
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::lreal_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::real_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::dint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::int_type_name,             &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::sint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::ulint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::udint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::uint_type_name,            &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::usint_type_name,           &search_constant_type_c::safetime_type_name },
msousa@417: 
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safelreal_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safereal_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safedint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeint_type_name,         &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safesint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeulint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeudint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeuint_type_name,        &search_constant_type_c::safetime_type_name },
msousa@417:     { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeusint_type_name,       &search_constant_type_c::safetime_type_name },
msousa@417: 
msousa@417:     { NULL, NULL, NULL },
msousa@417: };
msousa@417: 
msousa@425: /* Search for a datatype inside a candidate_datatypes list.
msousa@425:  * Returns: position of datatype in the list, or -1 if not found.
msousa@417:  */
msousa@425: int search_in_datatype_list(symbol_c *datatype, std::vector <symbol_c *> candidate_datatypes) {
msousa@425: 	for(unsigned int i = 0; i < candidate_datatypes.size(); i++)
msousa@425: 		if (is_type_equal(datatype, candidate_datatypes[i]))
msousa@425: 			return i;
msousa@425: 	/* Not found ! */
msousa@425: 	return -1;
msousa@425: }
msousa@425: 
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_ELEMENTARY_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   return is_ANY_MAGNITUDE_type(type_symbol)
msousa@417:       || is_ANY_BIT_type      (type_symbol)
msousa@417:       || is_ANY_STRING_type   (type_symbol)
msousa@417:       || is_ANY_DATE_type     (type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEELEMENTARY_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   return is_ANY_SAFEMAGNITUDE_type(type_symbol)
msousa@417:       || is_ANY_SAFEBIT_type      (type_symbol)
msousa@417:       || is_ANY_SAFESTRING_type   (type_symbol)
msousa@417:       || is_ANY_SAFEDATE_type     (type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_ELEMENTARY_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   /* NOTE: doing
msousa@417:    *          return is_ANY_SAFEELEMENTARY_type() || is_ANY_ELEMENTARY_type()
msousa@417:    *       is incorrect, as the literals would never be considered compatible...
msousa@417:    */
msousa@417:   return is_ANY_MAGNITUDE_compatible(type_symbol)
msousa@417:       || is_ANY_BIT_compatible      (type_symbol)
msousa@417:       || is_ANY_STRING_compatible   (type_symbol)
msousa@417:       || is_ANY_DATE_compatible     (type_symbol);
msousa@417: }
msousa@417: 
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_MAGNITUDE_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;}
msousa@417:   return is_ANY_NUM_type(type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEMAGNITUDE_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safetime_type_name_c)) {return true;}
msousa@417:   return is_ANY_SAFENUM_type(type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_MAGNITUDE_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_MAGNITUDE_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFEMAGNITUDE_type(type_symbol))              {return true;}
msousa@417: 
msousa@417:   return is_ANY_NUM_compatible(type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_NUM_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_REAL_type(type_symbol))                       {return true;}
msousa@417:   if (is_ANY_INT_type(type_symbol))                        {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFENUM_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   return is_ANY_SAFEREAL_type(type_symbol)
msousa@417:       || is_ANY_SAFEINT_type (type_symbol);
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_NUM_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_REAL_compatible(type_symbol))                       {return true;}
msousa@417:   if (is_ANY_INT_compatible(type_symbol))                        {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_DATE_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(tod_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(dt_type_name_c))   {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEDATE_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safedate_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safetod_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safedt_type_name_c))   {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_DATE_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_DATE_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFEDATE_type(type_symbol))              {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_STRING_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(string_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(wstring_type_name_c)) {return true;}
msousa@417: // TODO literal_string ???
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFESTRING_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safestring_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safewstring_type_name_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_STRING_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_STRING_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFESTRING_type(type_symbol))              {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_INT_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(sint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(int_type_name_c))   {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(dint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(lint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(uint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEINT_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safesint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeint_type_name_c))   {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safedint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safelint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeusint_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeuint_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeudint_type_name_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeulint_type_name_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_INT_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_INT_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFEINT_type(type_symbol))              {return true;}
msousa@425: //   if (is_literal_integer_type(type_symbol))          {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_REAL_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(real_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEREAL_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safereal_type_name_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safelreal_type_name_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_REAL_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_REAL_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFEREAL_type(type_symbol))              {return true;}
msousa@425: //   if (is_literal_real_type(type_symbol))              {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_BIT_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(bool_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(byte_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(word_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(dword_type_name_c))    {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(lword_type_name_c))    {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_SAFEBIT_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safebool_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safebyte_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safeword_type_name_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safedword_type_name_c))    {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(safelword_type_name_c))    {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_BIT_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_ANY_BIT_type    (type_symbol))              {return true;}
msousa@417:   if (is_ANY_SAFEBIT_type(type_symbol))              {return true;}
msousa@425: //   if (is_nonneg_literal_integer_type(type_symbol))   {return true;}
msousa@425: //   if (is_literal_bool_type(type_symbol))             {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_BOOL_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(bool_type_name_c))      {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_SAFEBOOL_type(symbol_c *type_symbol){
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(safebool_type_name_c))  {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_ANY_BOOL_compatible(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (is_BOOL_type    (type_symbol))              {return true;}
msousa@417:   if (is_SAFEBOOL_type(type_symbol))              {return true;}
msousa@425: //   if (is_literal_bool_type(type_symbol))              {return true;}
msousa@425:   return false;
msousa@425: }
msousa@425: 
msousa@425: 
msousa@425: 
msousa@425: #if 0
msousa@417: /* A helper function... */
msousa@417: bool is_literal_integer_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(neg_integer_c))        {return true;}
msousa@417:   return is_nonneg_literal_integer_type(type_symbol);
msousa@417: }
msousa@417: 
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_nonneg_literal_integer_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(integer_c))        {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(binary_integer_c)) {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(octal_integer_c))  {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(hex_integer_c))    {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_literal_real_type(symbol_c *type_symbol) {
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(real_c))     {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(neg_real_c)) {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: 
msousa@417: /* A helper function... */
msousa@417: bool is_literal_bool_type(symbol_c *type_symbol) {
msousa@417:   bool_type_name_c bool_t;
msousa@417: 
msousa@417:   if (type_symbol == NULL) {return false;}
msousa@417:   if (typeid(*type_symbol) == typeid(boolean_true_c))    {return true;}
msousa@417:   if (typeid(*type_symbol) == typeid(boolean_false_c))   {return true;}
msousa@417:   if (is_nonneg_literal_integer_type(type_symbol))
msousa@417:     if (sizeoftype(&bool_t) >= sizeoftype(type_symbol))  {return true;}
msousa@417:   return false;
msousa@417: }
msousa@417: 
msousa@417: /* Determine the common data type between two data types.
msousa@417:  * If no common data type found, return NULL.
msousa@417:  *
msousa@417:  * If data types are identical, return the first (actually any would do...).
msousa@417:  * If any of the data types is a literal, we confirm that
msousa@417:  *   the literal uses less bits than the fixed size data type.
msousa@417:  *   e.g. BYTE and 1024 returns NULL
msousa@417:  *        BYTE and 255  returns BYTE
msousa@417:  *
msousa@417:  * If two literals, then return the literal that requires more bits...
msousa@417:  */
msousa@417: 
msousa@417: symbol_c *common_type(symbol_c *first_type, symbol_c *second_type) {
msousa@417:   if (first_type == NULL && second_type == NULL) {return NULL;}
msousa@417:   if (first_type == NULL)  {return second_type;}
msousa@417:   if (second_type == NULL) {return first_type;}
msousa@417: 
msousa@417:   if (is_literal_integer_type(first_type) && is_literal_integer_type(second_type))
msousa@417:     {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);}
msousa@417: 
msousa@417:   if (is_literal_real_type(first_type) && is_literal_real_type(second_type))
msousa@417:     {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);}
msousa@417: 
msousa@417:   if (is_literal_bool_type(first_type) && is_literal_bool_type(second_type))
msousa@417:     {return first_type;}
msousa@417: 
msousa@417:   /* The following check can only be made after the is_literal_XXXX checks */
msousa@417:   /* When two literals of the same type, with identical typeid's are checked,
msousa@417:    * we must return the one that occupies more bits... This is done above.
msousa@417:    */
msousa@417:   if (typeid(*first_type) == typeid(*second_type)) {return first_type;}
msousa@417: 
msousa@417:   /* NOTE Although a BOOL is also an ANY_BIT, we must check it explicitly since some
msousa@417:    *       literal bool values are not literal integers...
msousa@417:    */
msousa@417:   if (is_BOOL_type(first_type)        && is_literal_bool_type(second_type))    {return first_type;}
msousa@417:   if (is_BOOL_type(second_type)       && is_literal_bool_type(first_type))     {return second_type;}
msousa@417: 
msousa@417:   if (is_SAFEBOOL_type(first_type)    && is_literal_bool_type(second_type))    {return first_type;}
msousa@417:   if (is_SAFEBOOL_type(second_type)   && is_literal_bool_type(first_type))     {return second_type;}
msousa@417: 
msousa@417:   if (is_SAFEBOOL_type(first_type)    && is_BOOL_type(second_type))            {return second_type;}
msousa@417:   if (is_SAFEBOOL_type(second_type)   && is_BOOL_type(first_type))             {return first_type;}
msousa@417: 
msousa@417:   if (is_ANY_BIT_type(first_type)     && is_nonneg_literal_integer_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_BIT_type(second_type)    && is_nonneg_literal_integer_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if (is_ANY_SAFEBIT_type(first_type)     && is_nonneg_literal_integer_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_SAFEBIT_type(second_type)    && is_nonneg_literal_integer_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if  (is_ANY_SAFEBIT_type(first_type)    && is_ANY_BIT_type(second_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);}
msousa@417:   if  (is_ANY_SAFEBIT_type(second_type)   && is_ANY_BIT_type(first_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);}
msousa@417: 
msousa@417:   if (is_ANY_INT_type(first_type)     && is_literal_integer_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_INT_type(second_type)    && is_literal_integer_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if (is_ANY_SAFEINT_type(first_type)     && is_literal_integer_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_SAFEINT_type(second_type)    && is_literal_integer_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if  (is_ANY_SAFEINT_type(first_type)    && is_ANY_INT_type(second_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);}
msousa@417:   if  (is_ANY_SAFEINT_type(second_type)   && is_ANY_INT_type(first_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);}
msousa@417: 
msousa@417:   if (is_ANY_REAL_type(first_type)    && is_literal_real_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_REAL_type(second_type)   && is_literal_real_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if (is_ANY_SAFEREAL_type(first_type)    && is_literal_real_type(second_type))
msousa@417:     {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}
msousa@417:   if (is_ANY_SAFEREAL_type(second_type)   && is_literal_real_type(first_type))
msousa@417:     {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}
msousa@417: 
msousa@417:   if  (is_ANY_SAFEREAL_type(first_type)    && is_ANY_REAL_type(second_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);}
msousa@417:   if  (is_ANY_SAFEREAL_type(second_type)   && is_ANY_REAL_type(first_type))
msousa@417:     {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);}
msousa@417: 
msousa@417:   /* the Time and Date types... */
msousa@417:   if (is_type(first_type,  safetime_type_name_c) && is_type(second_type, time_type_name_c))  {return second_type;}
msousa@417:   if (is_type(second_type, safetime_type_name_c) && is_type( first_type, time_type_name_c))  {return  first_type;}
msousa@417: 
msousa@417:   if (is_type(first_type,  safedate_type_name_c) && is_type(second_type, date_type_name_c))  {return second_type;}
msousa@417:   if (is_type(second_type, safedate_type_name_c) && is_type( first_type, date_type_name_c))  {return  first_type;}
msousa@417: 
msousa@417:   if (is_type(first_type,  safedt_type_name_c)   && is_type(second_type, dt_type_name_c))    {return second_type;}
msousa@417:   if (is_type(second_type, safedt_type_name_c)   && is_type( first_type, dt_type_name_c))    {return  first_type;}
msousa@417: 
msousa@417:   if (is_type(first_type,  safetod_type_name_c)  && is_type(second_type, tod_type_name_c))   {return second_type;}
msousa@417:   if (is_type(second_type, safetod_type_name_c)  && is_type( first_type, tod_type_name_c))   {return  first_type;}
msousa@417: 
msousa@417:   /* no common type */
msousa@417:   return NULL;
msousa@417: }
msousa@417: 
msousa@417: /* Return TRUE if the second (value) data type may be assigned to a variable of the first (variable) data type
msousa@417:  * such as:
msousa@417:  *     var_type     value_type
msousa@417:  *    BOOL           BYTE#7     -> returns false
msousa@417:  *    INT            INT#7      -> returns true
msousa@417:  *    INT            7          -> returns true
msousa@417:  *    REAL           7.89       -> returns true
msousa@417:  *    REAL           7          -> returns true
msousa@417:  *    INT            7.89       -> returns false
msousa@417:  *    SAFEBOOL       BOOL#1     -> returns false   !!!
msousa@417:  *   etc...
msousa@417:  *
msousa@417:  * NOTE: It is assumed that the var_type is the data type of an lvalue
msousa@417:  */
msousa@417: bool is_valid_assignment(symbol_c *var_type, symbol_c *value_type) {
msousa@417:   if (var_type == NULL)   {/* STAGE3_ERROR(value_type, value_type, "Var_type   == NULL"); */ return false;}
msousa@417:   if (value_type == NULL) {/* STAGE3_ERROR(var_type,   var_type,   "Value_type == NULL"); */ return false;}
msousa@417: 
msousa@417:   symbol_c *common_type_symbol = common_type(var_type, value_type);
msousa@417:   if (NULL == common_type_symbol)
msousa@417:     return false;
msousa@417:   return (typeid(*var_type) == typeid(*common_type_symbol));
msousa@417: }
msousa@417: 
msousa@417: 
msousa@417: /* Return TRUE if there is a common data type, otherwise return FALSE
msousa@417:  * i.e., return TRUE if both data types may be used simultaneously in an expression
msousa@417:  * such as:
msousa@417:  *    BOOL#0     AND BYTE#7  -> returns false
msousa@417:  *    0          AND BYTE#7  -> returns true
msousa@417:  *    INT#10     AND INT#7   -> returns true
msousa@417:  *    INT#10     AND 7       -> returns true
msousa@417:  *    REAL#34.3  AND 7.89    -> returns true
msousa@417:  *    REAL#34.3  AND 7       -> returns true
msousa@417:  *    INT#10     AND 7.89    -> returns false
msousa@417:  *    SAFEBOOL#0 AND BOOL#1  -> returns true   !!!
msousa@417:  *   etc...
msousa@417:  */
msousa@417: bool is_compatible_type(symbol_c *first_type, symbol_c *second_type) {
msousa@417:   if (first_type == NULL || second_type == NULL) {return false;}
msousa@417:   return (NULL != common_type(first_type, second_type));
msousa@417: }
msousa@425: #endif
msousa@417: 
msousa@417: bool is_type_equal(symbol_c *first_type, symbol_c *second_type)
msousa@417: {
msousa@417:     if (first_type == NULL || second_type == NULL) {
msousa@417:         return false;
msousa@417:     }
msousa@417:     if (is_ANY_ELEMENTARY_type(first_type)) {
msousa@417:         if (typeid(*first_type) == typeid(*second_type))
msousa@417:             return true;
msousa@417:     } else   /* ANY_DERIVED */
msousa@417:         return (first_type == second_type);
msousa@417: 
msousa@417:     return false;
msousa@417: }