1

/*

     2

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

     3

 *

     4

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

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 *  Copyright (C) 2012       Manuele Conti  (conti.ma@alice.it)

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 *

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

     8

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

     9

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

    10

 *  (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,

    13

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

    14

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

    16

 *

    17

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

    18

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

    19

 *

    20

 *

    21

 * This code is made available on the understanding that it will not be

    22

 * used in safety-critical situations without a full and competent review.

    23

 */

    24

    25

#include "datatype_functions.hh"

    26

#include "../absyntax_utils/absyntax_utils.hh"

    27

    48

/*

    49

 * 2.5.1.5.6 Functions of time data types

    50

 * Table 30 - page 64

    51

 */

    52

    53

const struct widen_entry widen_ADD_table[] = {

    54

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::time_type_name,            &search_constant_type_c::time_type_name     },

    55

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::tod_type_name      },

    56

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::dt_type_name       },

    57

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetime_type_name },

    58

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetod_type_name  },

    59

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safedt_type_name   },

    60

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },

    61

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },

    62

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetime_type_name,        &search_constant_type_c::tod_type_name      },

    63

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetod_type_name  },

    64

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },

    65

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },

    66

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safetime_type_name,        &search_constant_type_c::dt_type_name       },

    67

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safedt_type_name   },

    68

    { NULL, NULL, NULL },

    69

};

    70

    71

    72

const struct widen_entry widen_SUB_table[] = {

    73

	{ &search_constant_type_c::time_type_name,          &search_constant_type_c::time_type_name,            &search_constant_type_c::time_type_name     },

    74

	{ &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::tod_type_name      },

    75

	{ &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::dt_type_name       },

    76

	{ &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetime_type_name },

    77

	{ &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetod_type_name  },

    78

	{ &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safedt_type_name   },

    79

    80

	{ &search_constant_type_c::tod_type_name,           &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },

    81

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::time_type_name,            &search_constant_type_c::tod_type_name      },

    82

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetime_type_name,        &search_constant_type_c::tod_type_name      },

    83

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safetod_type_name  },

    84

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },

    85

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::time_type_name,            &search_constant_type_c::dt_type_name       },

    86

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safetime_type_name,        &search_constant_type_c::dt_type_name       },

    87

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safetime_type_name,        &search_constant_type_c::safedt_type_name   },

    88

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::tod_type_name,             &search_constant_type_c::time_type_name     },

    89

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::tod_type_name,             &search_constant_type_c::time_type_name     },

    90

    { &search_constant_type_c::tod_type_name,           &search_constant_type_c::safetod_type_name,         &search_constant_type_c::time_type_name     },

    91

    { &search_constant_type_c::safetod_type_name,       &search_constant_type_c::safetod_type_name,         &search_constant_type_c::safetime_type_name },

    92

    { &search_constant_type_c::date_type_name,          &search_constant_type_c::date_type_name,            &search_constant_type_c::time_type_name     },

    93

    { &search_constant_type_c::safedate_type_name,      &search_constant_type_c::date_type_name,            &search_constant_type_c::time_type_name     },

    94

    { &search_constant_type_c::date_type_name,          &search_constant_type_c::safedate_type_name,        &search_constant_type_c::time_type_name     },

    95

    { &search_constant_type_c::safedate_type_name,      &search_constant_type_c::safedate_type_name,        &search_constant_type_c::safetime_type_name },

    96

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::dt_type_name,              &search_constant_type_c::time_type_name     },

    97

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::dt_type_name,              &search_constant_type_c::time_type_name     },

    98

    { &search_constant_type_c::dt_type_name,            &search_constant_type_c::safedt_type_name,          &search_constant_type_c::time_type_name     },

    99

    { &search_constant_type_c::safedt_type_name,        &search_constant_type_c::safedt_type_name,          &search_constant_type_c::safetime_type_name },

   100

    { NULL, NULL, NULL },

   101

};

   102

   103

const struct widen_entry widen_MUL_table[] = {

   104

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::lreal_type_name,           &search_constant_type_c::time_type_name     },

   105

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::real_type_name,            &search_constant_type_c::time_type_name     },

   106

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::dint_type_name,            &search_constant_type_c::time_type_name     },

   107

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::int_type_name,             &search_constant_type_c::time_type_name     },

   108

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::sint_type_name,            &search_constant_type_c::time_type_name     },

   109

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::ulint_type_name,           &search_constant_type_c::time_type_name     },

   110

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::udint_type_name,           &search_constant_type_c::time_type_name     },

   111

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::uint_type_name,            &search_constant_type_c::time_type_name     },

   112

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::usint_type_name,           &search_constant_type_c::time_type_name     },

   113

   114

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::lreal_type_name,           &search_constant_type_c::safetime_type_name },

   115

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::real_type_name,            &search_constant_type_c::safetime_type_name },

   116

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::dint_type_name,            &search_constant_type_c::safetime_type_name },

   117

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::int_type_name,             &search_constant_type_c::safetime_type_name },

   118

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::sint_type_name,            &search_constant_type_c::safetime_type_name },

   119

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::ulint_type_name,           &search_constant_type_c::safetime_type_name },

   120

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::udint_type_name,           &search_constant_type_c::safetime_type_name },

   121

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::uint_type_name,            &search_constant_type_c::safetime_type_name },

   122

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::usint_type_name,           &search_constant_type_c::safetime_type_name },

   123

   124

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safelreal_type_name,       &search_constant_type_c::safetime_type_name },

   125

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safereal_type_name,        &search_constant_type_c::safetime_type_name },

   126

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safedint_type_name,        &search_constant_type_c::safetime_type_name },

   127

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeint_type_name,         &search_constant_type_c::safetime_type_name },

   128

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safesint_type_name,        &search_constant_type_c::safetime_type_name },

   129

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeulint_type_name,       &search_constant_type_c::safetime_type_name },

   130

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeudint_type_name,       &search_constant_type_c::safetime_type_name },

   131

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeuint_type_name,        &search_constant_type_c::safetime_type_name },

   132

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeusint_type_name,       &search_constant_type_c::safetime_type_name },

   133

   134

    { NULL, NULL, NULL },

   135

};

   136

   137

const struct widen_entry widen_DIV_table[] = {

   138

	{ &search_constant_type_c::time_type_name,          &search_constant_type_c::lreal_type_name,           &search_constant_type_c::time_type_name     },

   139

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::real_type_name,            &search_constant_type_c::time_type_name     },

   140

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::dint_type_name,            &search_constant_type_c::time_type_name     },

   141

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::int_type_name,             &search_constant_type_c::time_type_name     },

   142

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::sint_type_name,            &search_constant_type_c::time_type_name     },

   143

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::ulint_type_name,           &search_constant_type_c::time_type_name     },

   144

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::udint_type_name,           &search_constant_type_c::time_type_name     },

   145

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::uint_type_name,            &search_constant_type_c::time_type_name     },

   146

    { &search_constant_type_c::time_type_name,          &search_constant_type_c::usint_type_name,           &search_constant_type_c::time_type_name     },

   147

   148

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::lreal_type_name,           &search_constant_type_c::safetime_type_name },

   149

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::real_type_name,            &search_constant_type_c::safetime_type_name },

   150

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::dint_type_name,            &search_constant_type_c::safetime_type_name },

   151

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::int_type_name,             &search_constant_type_c::safetime_type_name },

   152

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::sint_type_name,            &search_constant_type_c::safetime_type_name },

   153

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::ulint_type_name,           &search_constant_type_c::safetime_type_name },

   154

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::udint_type_name,           &search_constant_type_c::safetime_type_name },

   155

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::uint_type_name,            &search_constant_type_c::safetime_type_name },

   156

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::usint_type_name,           &search_constant_type_c::safetime_type_name },

   157

   158

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safelreal_type_name,       &search_constant_type_c::safetime_type_name },

   159

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safereal_type_name,        &search_constant_type_c::safetime_type_name },

   160

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safedint_type_name,        &search_constant_type_c::safetime_type_name },

   161

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeint_type_name,         &search_constant_type_c::safetime_type_name },

   162

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safesint_type_name,        &search_constant_type_c::safetime_type_name },

   163

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeulint_type_name,       &search_constant_type_c::safetime_type_name },

   164

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeudint_type_name,       &search_constant_type_c::safetime_type_name },

   165

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeuint_type_name,        &search_constant_type_c::safetime_type_name },

   166

    { &search_constant_type_c::safetime_type_name,      &search_constant_type_c::safeusint_type_name,       &search_constant_type_c::safetime_type_name },

   167

   168

    { NULL, NULL, NULL },

   169

};

   170

   171

/* Search for a datatype inside a candidate_datatypes list.

   172

 * Returns: position of datatype in the list, or -1 if not found.

   173

 */

   174

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

   175

	for(unsigned int i = 0; i < candidate_datatypes.size(); i++)

   176

		if (is_type_equal(datatype, candidate_datatypes[i]))

   177

			return i;

   178

	/* Not found ! */

   179

	return -1;

   180

}

   181

   182

   183

/* A helper function... */

   184

bool is_ANY_ELEMENTARY_type(symbol_c *type_symbol) {

   185

  if (type_symbol == NULL) {return false;}

   186

  return is_ANY_MAGNITUDE_type(type_symbol)

   187

      || is_ANY_BIT_type      (type_symbol)

   188

      || is_ANY_STRING_type   (type_symbol)

   189

      || is_ANY_DATE_type     (type_symbol);

   190

}

   191

   192

/* A helper function... */

   193

bool is_ANY_SAFEELEMENTARY_type(symbol_c *type_symbol) {

   194

  if (type_symbol == NULL) {return false;}

   195

  return is_ANY_SAFEMAGNITUDE_type(type_symbol)

   196

      || is_ANY_SAFEBIT_type      (type_symbol)

   197

      || is_ANY_SAFESTRING_type   (type_symbol)

   198

      || is_ANY_SAFEDATE_type     (type_symbol);

   199

}

   200

   201

/* A helper function... */

   202

bool is_ANY_ELEMENTARY_compatible(symbol_c *type_symbol) {

   203

  if (type_symbol == NULL) {return false;}

   204

  /* NOTE: doing

   205

   *          return is_ANY_SAFEELEMENTARY_type() || is_ANY_ELEMENTARY_type()

   206

   *       is incorrect, as the literals would never be considered compatible...

   207

   */

   208

  return is_ANY_MAGNITUDE_compatible(type_symbol)

   209

      || is_ANY_BIT_compatible      (type_symbol)

   210

      || is_ANY_STRING_compatible   (type_symbol)

   211

      || is_ANY_DATE_compatible     (type_symbol);

   212

}

   213

   214

   215

/* A helper function... */

   216

bool is_ANY_MAGNITUDE_type(symbol_c *type_symbol) {

   217

  if (type_symbol == NULL) {return false;}

   218

  if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;}

   219

  return is_ANY_NUM_type(type_symbol);

   220

}

   221

   222

/* A helper function... */

   223

bool is_ANY_SAFEMAGNITUDE_type(symbol_c *type_symbol) {

   224

  if (type_symbol == NULL) {return false;}

   225

  if (typeid(*type_symbol) == typeid(safetime_type_name_c)) {return true;}

   226

  return is_ANY_SAFENUM_type(type_symbol);

   227

}

   228

   229

/* A helper function... */

   230

bool is_ANY_MAGNITUDE_compatible(symbol_c *type_symbol) {

   231

  if (type_symbol == NULL) {return false;}

   232

  if (is_ANY_MAGNITUDE_type    (type_symbol))              {return true;}

   233

  if (is_ANY_SAFEMAGNITUDE_type(type_symbol))              {return true;}

   234

   235

  return is_ANY_NUM_compatible(type_symbol);

   236

}

   237

   238

/* A helper function... */

   239

bool is_ANY_NUM_type(symbol_c *type_symbol) {

   240

  if (type_symbol == NULL) {return false;}

   241

  if (is_ANY_REAL_type(type_symbol))                       {return true;}

   242

  if (is_ANY_INT_type(type_symbol))                        {return true;}

   243

  return false;

   244

}

   245

   246

/* A helper function... */

   247

bool is_ANY_SAFENUM_type(symbol_c *type_symbol) {

   248

  if (type_symbol == NULL) {return false;}

   249

  return is_ANY_SAFEREAL_type(type_symbol)

   250

      || is_ANY_SAFEINT_type (type_symbol);

   251

}

   252

   253

/* A helper function... */

   254

bool is_ANY_NUM_compatible(symbol_c *type_symbol) {

   255

  if (type_symbol == NULL) {return false;}

   256

  if (is_ANY_REAL_compatible(type_symbol))                       {return true;}

   257

  if (is_ANY_INT_compatible(type_symbol))                        {return true;}

   258

  return false;

   259

}

   260

   261

/* A helper function... */

   262

bool is_ANY_DATE_type(symbol_c *type_symbol) {

   263

  if (type_symbol == NULL) {return false;}

   264

  if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;}

   265

  if (typeid(*type_symbol) == typeid(tod_type_name_c))  {return true;}

   266

  if (typeid(*type_symbol) == typeid(dt_type_name_c))   {return true;}

   267

  return false;

   268

}

   269

   270

/* A helper function... */

   271

bool is_ANY_SAFEDATE_type(symbol_c *type_symbol) {

   272

  if (type_symbol == NULL) {return false;}

   273

  if (typeid(*type_symbol) == typeid(safedate_type_name_c)) {return true;}

   274

  if (typeid(*type_symbol) == typeid(safetod_type_name_c))  {return true;}

   275

  if (typeid(*type_symbol) == typeid(safedt_type_name_c))   {return true;}

   276

  return false;

   277

}

   278

   279

/* A helper function... */

   280

bool is_ANY_DATE_compatible(symbol_c *type_symbol) {

   281

  if (type_symbol == NULL) {return false;}

   282

  if (is_ANY_DATE_type    (type_symbol))              {return true;}

   283

  if (is_ANY_SAFEDATE_type(type_symbol))              {return true;}

   284

  return false;

   285

}

   286

   287

/* A helper function... */

   288

bool is_ANY_STRING_type(symbol_c *type_symbol) {

   289

  if (type_symbol == NULL) {return false;}

   290

  if (typeid(*type_symbol) == typeid(string_type_name_c)) {return true;}

   291

  if (typeid(*type_symbol) == typeid(wstring_type_name_c)) {return true;}

   292

// TODO literal_string ???

   293

  return false;

   294

}

   295

   296

/* A helper function... */

   297

bool is_ANY_SAFESTRING_type(symbol_c *type_symbol) {

   298

  if (type_symbol == NULL) {return false;}

   299

  if (typeid(*type_symbol) == typeid(safestring_type_name_c)) {return true;}

   300

  if (typeid(*type_symbol) == typeid(safewstring_type_name_c)) {return true;}

   301

  return false;

   302

}

   303

   304

/* A helper function... */

   305

bool is_ANY_STRING_compatible(symbol_c *type_symbol) {

   306

  if (type_symbol == NULL) {return false;}

   307

  if (is_ANY_STRING_type    (type_symbol))              {return true;}

   308

  if (is_ANY_SAFESTRING_type(type_symbol))              {return true;}

   309

  return false;

   310

}

   311

   312

/* A helper function... */

   313

bool is_ANY_INT_type(symbol_c *type_symbol) {

   314

  if (type_symbol == NULL) {return false;}

   315

  if (typeid(*type_symbol) == typeid(sint_type_name_c))  {return true;}

   316

  if (typeid(*type_symbol) == typeid(int_type_name_c))   {return true;}

   317

  if (typeid(*type_symbol) == typeid(dint_type_name_c))  {return true;}

   318

  if (typeid(*type_symbol) == typeid(lint_type_name_c))  {return true;}

   319

  if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;}

   320

  if (typeid(*type_symbol) == typeid(uint_type_name_c))  {return true;}

   321

  if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;}

   322

  if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;}

   323

  return false;

   324

}

   325

   326

/* A helper function... */

   327

bool is_ANY_SAFEINT_type(symbol_c *type_symbol) {

   328

  if (type_symbol == NULL) {return false;}

   329

  if (typeid(*type_symbol) == typeid(safesint_type_name_c))  {return true;}

   330

  if (typeid(*type_symbol) == typeid(safeint_type_name_c))   {return true;}

   331

  if (typeid(*type_symbol) == typeid(safedint_type_name_c))  {return true;}

   332

  if (typeid(*type_symbol) == typeid(safelint_type_name_c))  {return true;}

   333

  if (typeid(*type_symbol) == typeid(safeusint_type_name_c)) {return true;}

   334

  if (typeid(*type_symbol) == typeid(safeuint_type_name_c))  {return true;}

   335

  if (typeid(*type_symbol) == typeid(safeudint_type_name_c)) {return true;}

   336

  if (typeid(*type_symbol) == typeid(safeulint_type_name_c)) {return true;}

   337

  return false;

   338

}

   339

   340

/* A helper function... */

   341

bool is_ANY_INT_compatible(symbol_c *type_symbol) {

   342

  if (type_symbol == NULL) {return false;}

   343

  if (is_ANY_INT_type    (type_symbol))              {return true;}

   344

  if (is_ANY_SAFEINT_type(type_symbol))              {return true;}

   345

//   if (is_literal_integer_type(type_symbol))          {return true;}

   346

  return false;

   347

}

   348

   349

/* A helper function... */

   350

bool is_ANY_REAL_type(symbol_c *type_symbol) {

   351

  if (type_symbol == NULL) {return false;}

   352

  if (typeid(*type_symbol) == typeid(real_type_name_c))  {return true;}

   353

  if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;}

   354

  return false;

   355

}

   356

   357

/* A helper function... */

   358

bool is_ANY_SAFEREAL_type(symbol_c *type_symbol) {

   359

  if (type_symbol == NULL) {return false;}

   360

  if (typeid(*type_symbol) == typeid(safereal_type_name_c))  {return true;}

   361

  if (typeid(*type_symbol) == typeid(safelreal_type_name_c)) {return true;}

   362

  return false;

   363

}

   364

   365

/* A helper function... */

   366

bool is_ANY_REAL_compatible(symbol_c *type_symbol) {

   367

  if (type_symbol == NULL) {return false;}

   368

  if (is_ANY_REAL_type    (type_symbol))              {return true;}

   369

  if (is_ANY_SAFEREAL_type(type_symbol))              {return true;}

   370

//   if (is_literal_real_type(type_symbol))              {return true;}

   371

  return false;

   372

}

   373

   374

/* A helper function... */

   375

bool is_ANY_BIT_type(symbol_c *type_symbol) {

   376

  if (type_symbol == NULL) {return false;}

   377

  if (typeid(*type_symbol) == typeid(bool_type_name_c))     {return true;}

   378

  if (typeid(*type_symbol) == typeid(byte_type_name_c))     {return true;}

   379

  if (typeid(*type_symbol) == typeid(word_type_name_c))     {return true;}

   380

  if (typeid(*type_symbol) == typeid(dword_type_name_c))    {return true;}

   381

  if (typeid(*type_symbol) == typeid(lword_type_name_c))    {return true;}

   382

  return false;

   383

}

   384

   385

/* A helper function... */

   386

bool is_ANY_SAFEBIT_type(symbol_c *type_symbol) {

   387

  if (type_symbol == NULL) {return false;}

   388

  if (typeid(*type_symbol) == typeid(safebool_type_name_c))     {return true;}

   389

  if (typeid(*type_symbol) == typeid(safebyte_type_name_c))     {return true;}

   390

  if (typeid(*type_symbol) == typeid(safeword_type_name_c))     {return true;}

   391

  if (typeid(*type_symbol) == typeid(safedword_type_name_c))    {return true;}

   392

  if (typeid(*type_symbol) == typeid(safelword_type_name_c))    {return true;}

   393

  return false;

   394

}

   395

   396

/* A helper function... */

   397

bool is_ANY_BIT_compatible(symbol_c *type_symbol) {

   398

  if (type_symbol == NULL) {return false;}

   399

  if (is_ANY_BIT_type    (type_symbol))              {return true;}

   400

  if (is_ANY_SAFEBIT_type(type_symbol))              {return true;}

   401

//   if (is_nonneg_literal_integer_type(type_symbol))   {return true;}

   402

//   if (is_literal_bool_type(type_symbol))             {return true;}

   403

  return false;

   404

}

   405

   406

/* A helper function... */

   407

bool is_BOOL_type(symbol_c *type_symbol) {

   408

  if (type_symbol == NULL) {return false;}

   409

  if (typeid(*type_symbol) == typeid(bool_type_name_c))      {return true;}

   410

  return false;

   411

}

   412

   413

/* A helper function... */

   414

bool is_SAFEBOOL_type(symbol_c *type_symbol){

   415

  if (type_symbol == NULL) {return false;}

   416

  if (typeid(*type_symbol) == typeid(safebool_type_name_c))  {return true;}

   417

  return false;

   418

}

   419

   420

/* A helper function... */

   421

bool is_ANY_BOOL_compatible(symbol_c *type_symbol) {

   422

  if (type_symbol == NULL) {return false;}

   423

  if (is_BOOL_type    (type_symbol))              {return true;}

   424

  if (is_SAFEBOOL_type(type_symbol))              {return true;}

   425

//   if (is_literal_bool_type(type_symbol))              {return true;}

   426

  return false;

   427

}

   428

   429

   430

   431

#if 0

   432

/* A helper function... */

   433

bool is_literal_integer_type(symbol_c *type_symbol) {

   434

  if (type_symbol == NULL) {return false;}

   435

  if (typeid(*type_symbol) == typeid(neg_integer_c))        {return true;}

   436

  return is_nonneg_literal_integer_type(type_symbol);

   437

}

   438

   439

   440

/* A helper function... */

   441

bool is_nonneg_literal_integer_type(symbol_c *type_symbol) {

   442

  if (type_symbol == NULL) {return false;}

   443

  if (typeid(*type_symbol) == typeid(integer_c))        {return true;}

   444

  if (typeid(*type_symbol) == typeid(binary_integer_c)) {return true;}

   445

  if (typeid(*type_symbol) == typeid(octal_integer_c))  {return true;}

   446

  if (typeid(*type_symbol) == typeid(hex_integer_c))    {return true;}

   447

  return false;

   448

}

   449

   450

   451

/* A helper function... */

   452

bool is_literal_real_type(symbol_c *type_symbol) {

   453

  if (type_symbol == NULL) {return false;}

   454

  if (typeid(*type_symbol) == typeid(real_c))     {return true;}

   455

  if (typeid(*type_symbol) == typeid(neg_real_c)) {return true;}

   456

  return false;

   457

}

   458

   459

   460

/* A helper function... */

   461

bool is_literal_bool_type(symbol_c *type_symbol) {

   462

  bool_type_name_c bool_t;

   463

   464

  if (type_symbol == NULL) {return false;}

   465

  if (typeid(*type_symbol) == typeid(boolean_true_c))    {return true;}

   466

  if (typeid(*type_symbol) == typeid(boolean_false_c))   {return true;}

   467

  if (is_nonneg_literal_integer_type(type_symbol))

   468

    if (sizeoftype(&bool_t) >= sizeoftype(type_symbol))  {return true;}

   469

  return false;

   470

}

   471

   472

/* Determine the common data type between two data types.

   473

 * If no common data type found, return NULL.

   474

 *

   475

 * If data types are identical, return the first (actually any would do...).

   476

 * If any of the data types is a literal, we confirm that

   477

 *   the literal uses less bits than the fixed size data type.

   478

 *   e.g. BYTE and 1024 returns NULL

   479

 *        BYTE and 255  returns BYTE

   480

 *

   481

 * If two literals, then return the literal that requires more bits...

   482

 */

   483

   484

symbol_c *common_type(symbol_c *first_type, symbol_c *second_type) {

   485

  if (first_type == NULL && second_type == NULL) {return NULL;}

   486

  if (first_type == NULL)  {return second_type;}

   487

  if (second_type == NULL) {return first_type;}

   488

   489

  if (is_literal_integer_type(first_type) && is_literal_integer_type(second_type))

   490

    {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);}

   491

   492

  if (is_literal_real_type(first_type) && is_literal_real_type(second_type))

   493

    {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);}

   494

   495

  if (is_literal_bool_type(first_type) && is_literal_bool_type(second_type))

   496

    {return first_type;}

   497

   498

  /* The following check can only be made after the is_literal_XXXX checks */

   499

  /* When two literals of the same type, with identical typeid's are checked,

   500

   * we must return the one that occupies more bits... This is done above.

   501

   */

   502

  if (typeid(*first_type) == typeid(*second_type)) {return first_type;}

   503

   504

  /* NOTE Although a BOOL is also an ANY_BIT, we must check it explicitly since some

   505

   *       literal bool values are not literal integers...

   506

   */

   507

  if (is_BOOL_type(first_type)        && is_literal_bool_type(second_type))    {return first_type;}

   508

  if (is_BOOL_type(second_type)       && is_literal_bool_type(first_type))     {return second_type;}

   509

   510

  if (is_SAFEBOOL_type(first_type)    && is_literal_bool_type(second_type))    {return first_type;}

   511

  if (is_SAFEBOOL_type(second_type)   && is_literal_bool_type(first_type))     {return second_type;}

   512

   513

  if (is_SAFEBOOL_type(first_type)    && is_BOOL_type(second_type))            {return second_type;}

   514

  if (is_SAFEBOOL_type(second_type)   && is_BOOL_type(first_type))             {return first_type;}

   515

   516

  if (is_ANY_BIT_type(first_type)     && is_nonneg_literal_integer_type(second_type))

   517

    {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}

   518

  if (is_ANY_BIT_type(second_type)    && is_nonneg_literal_integer_type(first_type))

   519

    {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}

   520

   521

  if (is_ANY_SAFEBIT_type(first_type)     && is_nonneg_literal_integer_type(second_type))

   522

    {return ((sizeoftype(first_type)  >= sizeoftype(second_type))? first_type :NULL);}

   523

  if (is_ANY_SAFEBIT_type(second_type)    && is_nonneg_literal_integer_type(first_type))

   524

    {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);}

   525

   526

  if  (is_ANY_SAFEBIT_type(first_type)    && is_ANY_BIT_type(second_type))