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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) 2009-2012  Mario de Sousa (msousa@fe.up.pt)

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 *  Copyright (C) 2012       Manuele Conti (manuele.conti@sirius-es.it)

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 *  Copyright (C) 2012       Matteo Facchinetti (matteo.facchinetti@sirius-es.it)

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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

    10

 *  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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 *

    18

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

    19

 *  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.

    24

 */

    25

    26

/*

    27

 * An IEC 61131-3 compiler.

    28

 *

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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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    34

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/*

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 *  Fill candidate list of data types for all symbols

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 */

    38

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#include "fill_candidate_datatypes.hh"

    40

#include "datatype_functions.hh"

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#include <typeinfo>

    42

#include <list>

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#include <string>

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#include <string.h>

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#include <strings.h>

    46

    47

/* set to 1 to see debug info during execution */

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static int debug = 0;

    49

    50

fill_candidate_datatypes_c::fill_candidate_datatypes_c(symbol_c *ignore) {

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}

    52

    53

fill_candidate_datatypes_c::~fill_candidate_datatypes_c(void) {

    54

}

    55

    56

symbol_c *fill_candidate_datatypes_c::widening_conversion(symbol_c *left_type, symbol_c *right_type, const struct widen_entry widen_table[]) {

    57

	int k;

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	/* find a widening table entry compatible */

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	for (k = 0; NULL != widen_table[k].left;  k++)

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		if ((typeid(*left_type) == typeid(*widen_table[k].left)) && (typeid(*right_type) == typeid(*widen_table[k].right)))

    61

			return widen_table[k].result;

    62

	return NULL;

    63

}

    64

    65

    66

    67

    68

/* returns true if compatible function/FB invocation, otherwise returns false */

    69

/* Assumes that the candidate_datatype lists of all the parameters being passed haved already been filled in */

    70

/*

    71

 * All parameters being passed to the called function MUST be in the parameter list to which f_call points to!

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 * This means that, for non formal function calls in IL, de current (default value) must be artificially added to the

    73

 * beginning of the parameter list BEFORE calling handle_function_call().

    74

 */

    75

bool fill_candidate_datatypes_c::match_nonformal_call(symbol_c *f_call, symbol_c *f_decl) {

    76

	symbol_c *call_param_value,  *param_datatype;

    77

	identifier_c *param_name;

    78

	function_param_iterator_c       fp_iterator(f_decl);

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	function_call_param_iterator_c fcp_iterator(f_call);

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	int extensible_parameter_highest_index = -1;

    81

	unsigned int i;

    82

    83

	/* Iterating through the non-formal parameters of the function call */

    84

	while((call_param_value = fcp_iterator.next_nf()) != NULL) {

    85

		/* Iterate to the next parameter of the function being called.

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		 * Get the name of that parameter, and ignore if EN or ENO.

    87

		 */

    88

		do {

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			param_name = fp_iterator.next();

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			/* If there is no other parameter declared, then we are passing too many parameters... */

    91

			if(param_name == NULL) return false;

    92

		} while ((strcmp(param_name->value, "EN") == 0) || (strcmp(param_name->value, "ENO") == 0));

    93

    94

		/* TODO: verify if it is lvalue when INOUT or OUTPUT parameters! */

    95

		/* Get the parameter type */

    96

		param_datatype = base_type(fp_iterator.param_type());

    97

    98

		/* check whether one of the candidate_data_types of the value being passed is the same as the param_type */

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		if (search_in_candidate_datatype_list(param_datatype, call_param_value->candidate_datatypes) < 0)

   100

			return false; /* return false if param_type not in the list! */

   101

	}

   102

	/* call is compatible! */

   103

	return true;

   104

}

   105

   106

   107

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/* returns true if compatible function/FB invocation, otherwise returns false */

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/* Assumes that the candidate_datatype lists of all the parameters being passed haved already been filled in */

   110

bool fill_candidate_datatypes_c::match_formal_call(symbol_c *f_call, symbol_c *f_decl, symbol_c **first_param_datatype) {

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	symbol_c *call_param_value, *call_param_name, *param_datatype;

   112

	symbol_c *verify_duplicate_param;

   113

	identifier_c *param_name;

   114

	function_param_iterator_c       fp_iterator(f_decl);

   115

	function_call_param_iterator_c fcp_iterator(f_call);

   116

	int extensible_parameter_highest_index = -1;

   117

	identifier_c *extensible_parameter_name;

   118

	unsigned int i;

   119

	bool is_first_param = true;

   120

   121

	/* Iterating through the formal parameters of the function call */

   122

	while((call_param_name = fcp_iterator.next_f()) != NULL) {

   123

		/* Obtaining the value being passed in the function call */

   124

		call_param_value = fcp_iterator.get_current_value();

   125

		/* the following should never occur. If it does, then we have a bug in our code... */

   126

		if (NULL == call_param_value) ERROR;

   127

   128

		/* Obtaining the assignment direction:  := (assign_in) or => (assign_out) */

   129

		function_call_param_iterator_c::assign_direction_t call_param_dir = fcp_iterator.get_assign_direction();

   130

   131

		/* Checking if there are duplicated parameter values */

   132

		verify_duplicate_param = fcp_iterator.search_f(call_param_name);

   133

		if(verify_duplicate_param != call_param_value)

   134

			return false;

   135

   136

		/* Obtaining the type of the value being passed in the function call */

   137

		std::vector <symbol_c *>&call_param_types = call_param_value->candidate_datatypes;

   138

   139

		/* Find the corresponding parameter in function declaration */

   140

		param_name = fp_iterator.search(call_param_name);

   141

		if(param_name == NULL) return false;

   142

		/* Get the parameter data type */

   143

		param_datatype = base_type(fp_iterator.param_type());

   144

		/* Get the parameter direction: IN, OUT, IN_OUT */

   145

		function_param_iterator_c::param_direction_t param_dir = fp_iterator.param_direction();

   146

   147

		/* check whether direction (IN, OUT, IN_OUT) and assignment types (:= , =>) are compatible !!! */

   148

		if          (function_call_param_iterator_c::assign_in  == call_param_dir) {

   149

			if ((function_param_iterator_c::direction_in    != param_dir) &&

   150

			    (function_param_iterator_c::direction_inout != param_dir))

   151

				return false;

   152

		} else if   (function_call_param_iterator_c::assign_out == call_param_dir) {

   153

			if ((function_param_iterator_c::direction_out   != param_dir))

   154

				return false;

   155

		} else ERROR;

   156

   157

		/* check whether one of the candidate_data_types of the value being passed is the same as the param_type */

   158

		if (search_in_candidate_datatype_list(param_datatype, call_param_types) < 0)

   159

			return false; /* return false if param_type not in the list! */

   160

   161

		/* If this is the first parameter, then copy the datatype to *first_param_datatype */

   162

		if (is_first_param)

   163

			if (NULL != first_param_datatype)

   164

				*first_param_datatype = param_datatype;

   165

		is_first_param = false;

   166

	}

   167

	/* call is compatible! */

   168

	return true;

   169

}

   170

   171

   172

   173

   174

/* Handle a generic function call!

   175

 * Assumes that the parameter_list containing the values being passed in this function invocation

   176

 * has already had all the candidate_datatype lists filled in!

   177

 *

   178

 * All parameters being passed to the called function MUST be in the parameter list to which f_call points to!

   179

 * This means that, for non formal function calls in IL, de current (default value) must be artificially added to the

   180

 * beginning of the parameter list BEFORE calling handle_function_call().

   181

 */

   182

/*

   183

typedef struct {

   184

  symbol_c *function_name,

   185

  symbol_c *nonformal_operand_list,

   186

  symbol_c *   formal_operand_list,

   187

   188

  std::vector <symbol_c *> &candidate_functions,  

   189

  symbol_c &*called_function_declaration,

   190

  int      &extensible_param_count

   191

} generic_function_call_t;

   192

*/

   193

/*

   194

void narrow_candidate_datatypes_c::narrow_function_invocation(symbol_c *fcall, generic_function_call_t fcall_data) {

   195

void *fill_candidate_datatypes_c::handle_function_call(symbol_c *f_call, symbol_c *function_name, invocation_type_t invocation_type,

   196

                                                       std::vector <symbol_c *> *candidate_datatypes,

   197

                                                       std::vector <symbol_c *> *candidate_functions) {

   198

  */

   199

void fill_candidate_datatypes_c::handle_function_call(symbol_c *fcall, generic_function_call_t fcall_data) {

   200

	function_declaration_c *f_decl;

   201

	list_c *parameter_list;

   202

	list_c *parameter_candidate_datatypes;

   203

	symbol_c *returned_parameter_type;

   204

   205

	if (debug) std::cout << "function()\n";

   206

   207

	function_symtable_t::iterator lower = function_symtable.lower_bound(fcall_data.function_name);

   208

	function_symtable_t::iterator upper = function_symtable.upper_bound(fcall_data.function_name);

   209

	/* If the name of the function being called is not found in the function symbol table, then this is an invalid call */

   210

	/* Since the lexical parser already checks for this, then if this occurs then we have an internal compiler error. */

   211

	if (lower == function_symtable.end()) ERROR;

   212

   213

	/* Look for all compatible function declarations, and add their return datatypes 

   214

	 * to the candidate_datatype list of this function invocation. 

   215

	 *

   216

	 * If only one function exists, we add its return datatype to the candidate_datatype list,

   217

	 * even if the parameters passed to it are invalid.

   218

	 * This guarantees that the remainder of the expression in which the function call is inserted

   219

	 * is treated as if the function call returns correctly, and therefore does not generate

   220

	 * spurious error messages.

   221

	 * Even if the parameters to the function call are invalid, doing this is still safe, as the 

   222

	 * expressions inside the function call will themselves have erros and will  guarantee that 

   223

	 * compilation is aborted in stage3 (in print_datatypes_error_c).

   224

	 */

   225

	if (function_symtable.multiplicity(fcall_data.function_name) == 1) {

   226

		f_decl = function_symtable.get_value(lower);

   227

		returned_parameter_type = base_type(f_decl->type_name);

   228

		fcall_data.candidate_functions.push_back(f_decl);

   229

		fcall->    candidate_datatypes.push_back(returned_parameter_type);

   230

	}

   231

	for(; lower != upper; lower++) {

   232

		bool compatible = false;

   233

   234

		f_decl = function_symtable.get_value(lower);

   235

		/* Check if function declaration in symbol_table is compatible with parameters */

   236

		if (NULL != fcall_data.nonformal_operand_list) compatible=match_nonformal_call(fcall, f_decl);

   237

		if (NULL != fcall_data.   formal_operand_list) compatible=   match_formal_call(fcall, f_decl);

   238

		if (compatible) {

   239

			/* Add the data type returned by the called functions. 

   240

			 * However, only do this if this data type is not already present in the candidate_datatypes list_c

   241

			 */

   242

			/* TODO

   243

			 * call  int search_in_datatype_list(symbol_c *datatype, std::vector <symbol_c *> candidate_datatypes);

   244

			 * instead of using for loop!

   245

			 */

   246

			unsigned int k;

   247

			returned_parameter_type = base_type(f_decl->type_name);

   248

			for(k = 0; k < fcall->candidate_datatypes.size(); k++) {

   249

				if (is_type_equal(returned_parameter_type, fcall->candidate_datatypes[k]))

   250

					break;

   251

			}

   252

			if (k >= fcall->candidate_datatypes.size()) {

   253

				fcall->    candidate_datatypes.push_back(returned_parameter_type);

   254

				fcall_data.candidate_functions.push_back(f_decl);

   255

			}

   256

		}

   257

	}

   258

	if (debug) std::cout << "end_function() [" << fcall->candidate_datatypes.size() << "] result.\n";

   259

	return;

   260

}

   261

   262

   263

/* handle implicit FB call in IL.

   264

 * e.g.  CLK ton_var

   265

 *        CU counter_var

   266

 */

   267

void fill_candidate_datatypes_c::handle_implicit_il_fb_call(symbol_c *il_instruction, const char *param_name, symbol_c *&called_fb_declaration) {

   268

	symbol_c *fb_type_id = search_varfb_instance_type->get_basetype_id(il_operand);

   269

  	/* Although a call to a non-declared FB is a semantic error, this is currently caught by stage 2! */

   270

	if (NULL == fb_type_id) ERROR;

   271

   272

	function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(fb_type_id);

   273

	if (function_block_type_symtable.end_value() == fb_decl)

   274

		/* The il_operand is not the name of a FB instance. Most probably it is the name of a variable of some other type.

   275

		 * this is a semantic error.

   276

		 */

   277

		fb_decl = NULL;

   278

   279

	/* The narrow_candidate_datatypes_c does not rely on this called_fb_declaration pointer being == NULL to conclude that

   280

	 * we have a datatype incompatibility error, so we set it to fb_decl to allow the print_datatype_error_c to print out

   281

	 * more informative error messages!

   282

	 */

   283

	called_fb_declaration = fb_decl;

   284

   285

	/* This implicit FB call does not change the value stored in the current/default IL variable */

   286

	/* It does, however, require that the datatype be compatible with the input parameter of the FB being called. 

   287

	 * If we were to follow the filling & narrowing algorithm correctly (implemented in fill_candidate_datatypes_c

   288

	 * & narrow_candidate_datatypes_c respectively), we should be restricting the candidate_datatpes to the datatypes

   289

	 * that are compatible to the FB call. 

   290

	 * However, doing the above will often result in some very confusing error messages for the user, especially in the case

   291

	 * in which the FB call is wrong, so the resulting cadidate datatypes is an empty list. In this case, the user would see

   292

	 * many error messages related to the IL instructions that follow the FB call, even though those IL instructions may be perfectly

   293

	 * correct.

   294

	 * For now, we will simply let the narrow_candidate_datatypes_c verify if the datatypes are compatible (something that should be done

   295

	 * here).

   296

	 */

   297

	if (NULL != prev_il_instruction)

   298

		copy_candidate_datatype_list(prev_il_instruction/*from*/, il_instruction/*to*/);

   299

   300

	if (debug) std::cout << "handle_implicit_il_fb_call() [" << prev_il_instruction->candidate_datatypes.size() << "] ==> " << il_instruction->candidate_datatypes.size() << " result.\n";

   301

}

   302

   303

   304

/* a helper function... */

   305

symbol_c *fill_candidate_datatypes_c::base_type(symbol_c *symbol) {

   306

	/* NOTE: symbol == NULL is valid. It will occur when, for e.g., an undefined/undeclared symbolic_variable is used

   307

	 *       in the code.

   308

	 */

   309

	if (symbol == NULL) return NULL;

   310

	return (symbol_c *)symbol->accept(search_base_type);

   311

}

   312

   313

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

   314

/* B 1.2 - Constants */

   315

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

   316

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

   317

/* B 1.2.1 - Numeric Literals */

   318

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

   319

void *fill_candidate_datatypes_c::visit(real_c *symbol) {

   320

	int calc_size;

   321

   322

	calc_size = sizeoftype(symbol);

   323

	if (calc_size <= sizeoftype(&search_constant_type_c::real_type_name))

   324

		symbol->candidate_datatypes.push_back(&search_constant_type_c::real_type_name);

   325

	if (calc_size <= sizeoftype(&search_constant_type_c::lreal_type_name))

   326

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lreal_type_name);

   327

	if (debug) std::cout << "ANY_REAL [" << symbol->candidate_datatypes.size() << "]" << std::endl;

   328

	return NULL;

   329

}

   330

   331

void *fill_candidate_datatypes_c::visit(integer_c *symbol) {

   332

	int calc_size;

   333

   334

	calc_size = sizeoftype(symbol);

   335

	if (calc_size <= sizeoftype(&search_constant_type_c::bool_type_name))

   336

	        symbol->candidate_datatypes.push_back(&search_constant_type_c::bool_type_name);

   337

	if (calc_size <= sizeoftype(&search_constant_type_c::byte_type_name))

   338

		symbol->candidate_datatypes.push_back(&search_constant_type_c::byte_type_name);

   339

	if (calc_size <= sizeoftype(&search_constant_type_c::word_type_name))

   340

		symbol->candidate_datatypes.push_back(&search_constant_type_c::word_type_name);

   341

	if (calc_size <= sizeoftype(&search_constant_type_c::dword_type_name))

   342

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dword_type_name);

   343

	if (calc_size <= sizeoftype(&search_constant_type_c::lword_type_name))

   344

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lword_type_name);

   345

   346

	if (calc_size < sizeoftype(&search_constant_type_c::sint_type_name))

   347

		symbol->candidate_datatypes.push_back(&search_constant_type_c::sint_type_name);

   348

	if (calc_size < sizeoftype(&search_constant_type_c::int_type_name))

   349

		symbol->candidate_datatypes.push_back(&search_constant_type_c::int_type_name);

   350

	if (calc_size < sizeoftype(&search_constant_type_c::dint_type_name))

   351

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dint_type_name);

   352

	if (calc_size < sizeoftype(&search_constant_type_c::lint_type_name))

   353

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lint_type_name);

   354

	if (calc_size <= sizeoftype(&search_constant_type_c::usint_type_name))

   355

		symbol->candidate_datatypes.push_back(&search_constant_type_c::usint_type_name);

   356

	if (calc_size <= sizeoftype(&search_constant_type_c::uint_type_name))

   357

		symbol->candidate_datatypes.push_back(&search_constant_type_c::uint_type_name);

   358

	if (calc_size <= sizeoftype(&search_constant_type_c::udint_type_name))

   359

		symbol->candidate_datatypes.push_back(&search_constant_type_c::udint_type_name);

   360

	if (calc_size <= sizeoftype(&search_constant_type_c::ulint_type_name))

   361

		symbol->candidate_datatypes.push_back(&search_constant_type_c::ulint_type_name);

   362

	if (debug) std::cout << "ANY_INT [" << symbol->candidate_datatypes.size()<< "]" << std::endl;

   363

	return NULL;

   364

}

   365

   366

void *fill_candidate_datatypes_c::visit(neg_real_c *symbol) {

   367

	if (sizeoftype(symbol) <= sizeoftype(&search_constant_type_c::real_type_name))

   368

		symbol->candidate_datatypes.push_back(&search_constant_type_c::real_type_name);

   369

	symbol->candidate_datatypes.push_back(&search_constant_type_c::lreal_type_name);

   370

	if (debug) std::cout << "neg ANY_REAL [" << symbol->candidate_datatypes.size() << "]" << std::endl;

   371

	return NULL;

   372

}

   373

   374

void *fill_candidate_datatypes_c::visit(neg_integer_c *symbol) {

   375

	int calc_size;

   376

   377

	calc_size = sizeoftype(symbol);

   378

	if (calc_size <= sizeoftype(&search_constant_type_c::int_type_name))

   379

		symbol->candidate_datatypes.push_back(&search_constant_type_c::int_type_name);

   380

	if (calc_size <= sizeoftype(&search_constant_type_c::sint_type_name))

   381

		symbol->candidate_datatypes.push_back(&search_constant_type_c::sint_type_name);

   382

	if (calc_size <= sizeoftype(&search_constant_type_c::dint_type_name))

   383

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dint_type_name);

   384

	if (calc_size <= sizeoftype(&search_constant_type_c::lint_type_name))

   385

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lint_type_name);

   386

	if (debug) std::cout << "neg ANY_INT [" << symbol->candidate_datatypes.size() << "]" << std::endl;

   387

	return NULL;

   388

}

   389

   390

void *fill_candidate_datatypes_c::visit(binary_integer_c *symbol) {

   391

	int calc_size;

   392

   393

	calc_size = sizeoftype(symbol);

   394

	if (calc_size <= sizeoftype(&search_constant_type_c::bool_type_name))

   395

	        symbol->candidate_datatypes.push_back(&search_constant_type_c::bool_type_name);

   396

	if (calc_size <= sizeoftype(&search_constant_type_c::byte_type_name))

   397

		symbol->candidate_datatypes.push_back(&search_constant_type_c::byte_type_name);

   398

	if (calc_size <= sizeoftype(&search_constant_type_c::word_type_name))

   399

		symbol->candidate_datatypes.push_back(&search_constant_type_c::word_type_name);

   400

	if (calc_size <= sizeoftype(&search_constant_type_c::dword_type_name))

   401

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dword_type_name);

   402

	if (calc_size <= sizeoftype(&search_constant_type_c::lword_type_name))

   403

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lword_type_name);

   404

   405

	if (calc_size < sizeoftype(&search_constant_type_c::sint_type_name))

   406

		symbol->candidate_datatypes.push_back(&search_constant_type_c::sint_type_name);

   407

	if (calc_size < sizeoftype(&search_constant_type_c::int_type_name))

   408

		symbol->candidate_datatypes.push_back(&search_constant_type_c::int_type_name);

   409

	if (calc_size < sizeoftype(&search_constant_type_c::dint_type_name))

   410

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dint_type_name);

   411

	if (calc_size < sizeoftype(&search_constant_type_c::lint_type_name))

   412

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lint_type_name);

   413

	if (calc_size <= sizeoftype(&search_constant_type_c::usint_type_name))

   414

		symbol->candidate_datatypes.push_back(&search_constant_type_c::usint_type_name);

   415

	if (calc_size <= sizeoftype(&search_constant_type_c::uint_type_name))

   416

		symbol->candidate_datatypes.push_back(&search_constant_type_c::uint_type_name);

   417

	if (calc_size <= sizeoftype(&search_constant_type_c::udint_type_name))

   418

		symbol->candidate_datatypes.push_back(&search_constant_type_c::udint_type_name);

   419

	if (calc_size <= sizeoftype(&search_constant_type_c::ulint_type_name))

   420

		symbol->candidate_datatypes.push_back(&search_constant_type_c::ulint_type_name);

   421

	if (debug) std::cout << "ANY_INT [" << symbol->candidate_datatypes.size()<< "]" << std::endl;

   422

	return NULL;

   423

}

   424

   425

void *fill_candidate_datatypes_c::visit(octal_integer_c *symbol) {

   426

	int calc_size;

   427

   428

	calc_size = sizeoftype(symbol);

   429

	if (calc_size <= sizeoftype(&search_constant_type_c::bool_type_name))

   430

	        symbol->candidate_datatypes.push_back(&search_constant_type_c::bool_type_name);

   431

	if (calc_size <= sizeoftype(&search_constant_type_c::byte_type_name))

   432

		symbol->candidate_datatypes.push_back(&search_constant_type_c::byte_type_name);

   433

	if (calc_size <= sizeoftype(&search_constant_type_c::word_type_name))

   434

		symbol->candidate_datatypes.push_back(&search_constant_type_c::word_type_name);

   435

	if (calc_size <= sizeoftype(&search_constant_type_c::dword_type_name))

   436

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dword_type_name);

   437

	if (calc_size <= sizeoftype(&search_constant_type_c::lword_type_name))

   438

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lword_type_name);

   439

   440

	if (calc_size < sizeoftype(&search_constant_type_c::sint_type_name))

   441

		symbol->candidate_datatypes.push_back(&search_constant_type_c::sint_type_name);

   442

	if (calc_size < sizeoftype(&search_constant_type_c::int_type_name))

   443

		symbol->candidate_datatypes.push_back(&search_constant_type_c::int_type_name);

   444

	if (calc_size < sizeoftype(&search_constant_type_c::dint_type_name))

   445

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dint_type_name);

   446

	if (calc_size < sizeoftype(&search_constant_type_c::lint_type_name))

   447

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lint_type_name);

   448

	if (calc_size <= sizeoftype(&search_constant_type_c::usint_type_name))

   449

		symbol->candidate_datatypes.push_back(&search_constant_type_c::usint_type_name);

   450

	if (calc_size <= sizeoftype(&search_constant_type_c::uint_type_name))

   451

		symbol->candidate_datatypes.push_back(&search_constant_type_c::uint_type_name);

   452

	if (calc_size <= sizeoftype(&search_constant_type_c::udint_type_name))

   453

		symbol->candidate_datatypes.push_back(&search_constant_type_c::udint_type_name);

   454

	if (calc_size <= sizeoftype(&search_constant_type_c::ulint_type_name))

   455

		symbol->candidate_datatypes.push_back(&search_constant_type_c::ulint_type_name);

   456

	if (debug) std::cout << "ANY_INT [" << symbol->candidate_datatypes.size()<< "]" << std::endl;

   457

	return NULL;

   458

}

   459

   460

void *fill_candidate_datatypes_c::visit(hex_integer_c *symbol) {

   461

	int calc_size;

   462

   463

	calc_size = sizeoftype(symbol);

   464

	if (calc_size <= sizeoftype(&search_constant_type_c::bool_type_name))

   465

	        symbol->candidate_datatypes.push_back(&search_constant_type_c::bool_type_name);

   466

	if (calc_size <= sizeoftype(&search_constant_type_c::byte_type_name))

   467

		symbol->candidate_datatypes.push_back(&search_constant_type_c::byte_type_name);

   468

	if (calc_size <= sizeoftype(&search_constant_type_c::word_type_name))

   469

		symbol->candidate_datatypes.push_back(&search_constant_type_c::word_type_name);

   470

	if (calc_size <= sizeoftype(&search_constant_type_c::dword_type_name))

   471

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dword_type_name);

   472

	if (calc_size <= sizeoftype(&search_constant_type_c::lword_type_name))

   473

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lword_type_name);

   474

   475

	if (calc_size < sizeoftype(&search_constant_type_c::sint_type_name))

   476

		symbol->candidate_datatypes.push_back(&search_constant_type_c::sint_type_name);

   477

	if (calc_size < sizeoftype(&search_constant_type_c::int_type_name))

   478

		symbol->candidate_datatypes.push_back(&search_constant_type_c::int_type_name);

   479

	if (calc_size < sizeoftype(&search_constant_type_c::dint_type_name))

   480

		symbol->candidate_datatypes.push_back(&search_constant_type_c::dint_type_name);

   481

	if (calc_size < sizeoftype(&search_constant_type_c::lint_type_name))

   482

		symbol->candidate_datatypes.push_back(&search_constant_type_c::lint_type_name);

   483

	if (calc_size <= sizeoftype(&search_constant_type_c::usint_type_name))

   484

		symbol->candidate_datatypes.push_back(&search_constant_type_c::usint_type_name);

   485

	if (calc_size <= sizeoftype(&search_constant_type_c::uint_type_name))

   486

		symbol->candidate_datatypes.push_back(&search_constant_type_c::uint_type_name);

   487

	if (calc_size <= sizeoftype(&search_constant_type_c::udint_type_name))

   488

		symbol->candidate_datatypes.push_back(&search_constant_type_c::udint_type_name);

   489

	if (calc_size <= sizeoftype(&search_constant_type_c::ulint_type_name))

   490

		symbol->candidate_datatypes.push_back(&search_constant_type_c::ulint_type_name);

   491

	if (debug) std::cout << "ANY_INT [" << symbol->candidate_datatypes.size()<< "]" << std::endl;

   492

	return NULL;

   493

}

   494

   495

// SYM_REF2(integer_literal_c, type, value)

   496

void *fill_candidate_datatypes_c::visit(integer_literal_c *symbol) {

   497

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

   498

	if (search_in_candidate_datatype_list(symbol->type, symbol->value->candidate_datatypes) >= 0)

   499

		symbol->candidate_datatypes.push_back(symbol->type);

   500

	if (debug) std::cout << "INT_LITERAL [" << symbol->candidate_datatypes.size() << "]\n";

   501

	return NULL;

   502

}

   503

   504

void *fill_candidate_datatypes_c::visit(real_literal_c *symbol) {

   505

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

   506

	if (search_in_candidate_datatype_list(symbol->type, symbol->value->candidate_datatypes) >= 0)

   507

		symbol->candidate_datatypes.push_back(symbol->type);

   508

	if (debug) std::cout << "REAL_LITERAL [" << symbol->candidate_datatypes.size() << "]\n";

   509

	return NULL;

   510

}

   511