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)

     5

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

     6

 *

     7

 *  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.

    11

 *

    12

 *  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

    15

 *  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

    28

/*

    29

 * 2.5.1.5.6 Functions of time data types

    30

 * Table 30 - page 64

    31

 */

    32

    33

const struct widen_entry widen_ADD_table[] = {

    34

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

    35

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

    36

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

    37

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

    38

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

    39

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

    40

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

    41

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

    42

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

    43

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

    44

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

    45

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

    46

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

    47

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

    48

    { NULL, NULL, NULL },

    49

};

    50

    51

    52

const struct widen_entry widen_SUB_table[] = {

    53

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

    54

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

    55

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

    56

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

    57

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

    58

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

    59

    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

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

    69

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

    70

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

    71

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

    72

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

    73

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

    74

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

    75

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

    76

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

    77

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

    78

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

    79

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

    80

    { NULL, NULL, NULL },

    81

};

    82

    83

const struct widen_entry widen_MUL_table[] = {

    84

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

    85

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

    86

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

    87

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

    88

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

    89

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

    90

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

    91

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

    92

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

    93

    94

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

    95

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

    96

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

    97

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

    98

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

    99

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

   100

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

   101

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

   102

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

   103

   104

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

   105

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

   106

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

   107

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

   108

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

   109

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

   110

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

   111

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

   112

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

   113

   114

    { NULL, NULL, NULL },

   115

};

   116

   117

const struct widen_entry widen_DIV_table[] = {

   118

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

   119

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

   120

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

   121

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

   122

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

   123

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

   124

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

   125

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

   126

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

   127

   128

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

   129

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

   130

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

   131

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

   132

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

   133

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

   134

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

   135

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

   136

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

   137

   138

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

   139

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

   140

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

   141

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

   142

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

   143

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

   144

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

   145

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

   146

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

   147

   148

    { NULL, NULL, NULL },

   149

};

   150

   151

/* NOTE on data type handling and literals...

   152

 * ==========================================

   153

 *

   154

 * Literals that are explicitly type cast

   155

 *   e.g.:   BYTE#42

   156

 *           INT#65

   157

 *           TIME#45h23m

   158

 *               etc...

   159

 *  are NOT considered literals in the following code.

   160

 *  Since they are type cast, and their data type is fixed and well known,

   161

 *  they are treated as a variable of that data type (except when determining lvalues)

   162

 *  In other words, when calling search_constant_type_c on these constants, it returns

   163

 *  a xxxxx_type_name_c, and not one of the xxxx_literal_c !

   164

 *

   165

 *  When the following code handles a literal, it is really a literal of unknown data type.

   166

 *    e.g.   42, may be considered an int, a byte, a word, etc...

   167

 *

   168

 * NOTE: type_symbol == NULL is valid!

   169

 *       This will occur, for example, when and undefined/undeclared symbolic_variable is used in the program.

   170

 *       This will not be of any type, so we always return false.

   171

 */

   172

   173

/* A helper function... */

   174

bool is_ANY_ELEMENTARY_type(symbol_c *type_symbol) {

   175

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

   176

  return is_ANY_MAGNITUDE_type(type_symbol)

   177

      || is_ANY_BIT_type      (type_symbol)

   178

      || is_ANY_STRING_type   (type_symbol)

   179

      || is_ANY_DATE_type     (type_symbol);

   180

}

   181

   182

/* A helper function... */

   183

bool is_ANY_SAFEELEMENTARY_type(symbol_c *type_symbol) {

   184

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

   185

  return is_ANY_SAFEMAGNITUDE_type(type_symbol)

   186

      || is_ANY_SAFEBIT_type      (type_symbol)

   187

      || is_ANY_SAFESTRING_type   (type_symbol)

   188

      || is_ANY_SAFEDATE_type     (type_symbol);

   189

}

   190

   191

/* A helper function... */

   192

bool is_ANY_ELEMENTARY_compatible(symbol_c *type_symbol) {

   193

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

   194

  /* NOTE: doing

   195

   *          return is_ANY_SAFEELEMENTARY_type() || is_ANY_ELEMENTARY_type()

   196

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

   197

   */

   198

  return is_ANY_MAGNITUDE_compatible(type_symbol)

   199

      || is_ANY_BIT_compatible      (type_symbol)

   200

      || is_ANY_STRING_compatible   (type_symbol)

   201

      || is_ANY_DATE_compatible     (type_symbol);

   202

}

   203

   204

   205

/* A helper function... */

   206

bool is_ANY_MAGNITUDE_type(symbol_c *type_symbol) {

   207

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

   208

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

   209

  return is_ANY_NUM_type(type_symbol);

   210

}

   211

   212

/* A helper function... */

   213

bool is_ANY_SAFEMAGNITUDE_type(symbol_c *type_symbol) {

   214

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

   215

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

   216

  return is_ANY_SAFENUM_type(type_symbol);

   217

}

   218

   219

/* A helper function... */

   220

bool is_ANY_MAGNITUDE_compatible(symbol_c *type_symbol) {

   221

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

   222

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

   223

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

   224

   225

  return is_ANY_NUM_compatible(type_symbol);

   226

}

   227

   228

/* A helper function... */

   229

bool is_ANY_NUM_type(symbol_c *type_symbol) {

   230

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

   231

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

   232

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

   233

  return false;

   234

}

   235

   236

/* A helper function... */

   237

bool is_ANY_SAFENUM_type(symbol_c *type_symbol) {

   238

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

   239

  return is_ANY_SAFEREAL_type(type_symbol)

   240

      || is_ANY_SAFEINT_type (type_symbol);

   241

}

   242

   243

/* A helper function... */

   244

bool is_ANY_NUM_compatible(symbol_c *type_symbol) {

   245

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

   246

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

   247

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

   248

  return false;

   249

}

   250

   251

/* A helper function... */

   252

bool is_ANY_DATE_type(symbol_c *type_symbol) {

   253

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

   254

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

   255

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

   256

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

   257

  return false;

   258

}

   259

   260

/* A helper function... */

   261

bool is_ANY_SAFEDATE_type(symbol_c *type_symbol) {

   262

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

   263

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

   264

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

   265

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

   266

  return false;

   267

}

   268

   269

/* A helper function... */

   270

bool is_ANY_DATE_compatible(symbol_c *type_symbol) {

   271

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

   272

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

   273

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

   274

  return false;

   275

}

   276

   277

/* A helper function... */

   278

bool is_ANY_STRING_type(symbol_c *type_symbol) {

   279

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

   280

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

   281

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

   282

// TODO literal_string ???

   283

  return false;

   284

}

   285

   286

/* A helper function... */

   287

bool is_ANY_SAFESTRING_type(symbol_c *type_symbol) {

   288

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

   289

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

   290

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

   291

  return false;

   292

}

   293

   294

/* A helper function... */

   295

bool is_ANY_STRING_compatible(symbol_c *type_symbol) {

   296

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

   297

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

   298

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

   299

  return false;

   300

}

   301

   302

/* A helper function... */

   303

bool is_ANY_INT_type(symbol_c *type_symbol) {

   304

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

   305

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

   306

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

   307

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

   308

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

   309

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

   310

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

   311

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

   312

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

   313

  return false;

   314

}

   315

   316

/* A helper function... */

   317

bool is_ANY_SAFEINT_type(symbol_c *type_symbol) {

   318

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

   319

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

   320

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

   321

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

   322

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

   323

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

   324

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

   325

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

   326

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

   327

  return false;

   328

}

   329

   330

/* A helper function... */

   331

bool is_ANY_INT_compatible(symbol_c *type_symbol) {

   332

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

   333

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

   334

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

   335

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

   336

  return false;

   337

}

   338

   339

/* A helper function... */

   340

bool is_ANY_REAL_type(symbol_c *type_symbol) {

   341

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

   342

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

   343

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

   344

  return false;

   345

}

   346

   347

/* A helper function... */

   348

bool is_ANY_SAFEREAL_type(symbol_c *type_symbol) {

   349

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

   350

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

   351

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

   352

  return false;

   353

}

   354

   355

/* A helper function... */

   356

bool is_ANY_REAL_compatible(symbol_c *type_symbol) {

   357

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

   358

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

   359

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

   360

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

   361

  return false;

   362

}

   363

   364

/* A helper function... */

   365

bool is_ANY_BIT_type(symbol_c *type_symbol) {

   366

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

   367

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

   368

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

   369

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

   370

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

   371

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

   372

  return false;

   373

}

   374

   375

/* A helper function... */

   376

bool is_ANY_SAFEBIT_type(symbol_c *type_symbol) {

   377

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

   378

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

   379

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

   380

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

   381

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

   382

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

   383

  return false;

   384

}

   385

   386

/* A helper function... */

   387

bool is_ANY_BIT_compatible(symbol_c *type_symbol) {

   388

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

   389

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

   390

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

   391

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

   392

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

   393

  return false;

   394

}

   395

   396

/* A helper function... */

   397

bool is_BOOL_type(symbol_c *type_symbol) {

   398

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

   399

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

   400

  return false;

   401

}

   402

   403

/* A helper function... */

   404

bool is_SAFEBOOL_type(symbol_c *type_symbol){

   405

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

   406

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

   407

  return false;

   408

}

   409

   410

/* A helper function... */

   411

bool is_ANY_BOOL_compatible(symbol_c *type_symbol) {

   412

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

   413

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

   414

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

   415

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

   416

  return false;

   417

}

   418

   419

/* A helper function... */

   420

bool is_literal_integer_type(symbol_c *type_symbol) {

   421

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

   422

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

   423

  return is_nonneg_literal_integer_type(type_symbol);

   424

}

   425

   426

   427

/* A helper function... */

   428

bool is_nonneg_literal_integer_type(symbol_c *type_symbol) {

   429

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

   430

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

   431

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

   432

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

   433

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

   434

  return false;

   435

}

   436

   437

   438

/* A helper function... */

   439

bool is_literal_real_type(symbol_c *type_symbol) {

   440

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

   441

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

   442

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

   443

  return false;

   444

}

   445

   446

   447

/* A helper function... */

   448

bool is_literal_bool_type(symbol_c *type_symbol) {

   449

  bool_type_name_c bool_t;

   450

   451

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

   452

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

   453

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

   454

  if (is_nonneg_literal_integer_type(type_symbol))

   455

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

   456

  return false;

   457

}

   458

   459

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

   460

 * If no common data type found, return NULL.

   461

 *

   462

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

   463

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

   464

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

   465

 *   e.g. BYTE and 1024 returns NULL

   466

 *        BYTE and 255  returns BYTE

   467

 *

   468

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

   469

 */

   470

   471

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

   472

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

   473

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

   474

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

   475

   476

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

   477

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

   478

   479

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

   480

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

   481

   482

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

   483

    {return first_type;}

   484

   485

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

   486

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

   487

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

   488

   */

   489

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

   490

   491

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

   492

   *       literal bool values are not literal integers...

   493

   */

   494

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

   495

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

   496

   497

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

   498

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

   499

   500

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

   501

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

   502

   503

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

   504

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

   505

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

   506

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

   507

   508

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

   509

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

   510

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

   511

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

   512

   513

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

   514

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

   515

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

   516

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

   517

   518

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

   519

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

   520

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

   521

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

   522

   523

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

   524

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

   525

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

   526

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

   527

   528

  if  (is_ANY_SAFEINT_type(first_type)    && is_ANY_INT_type(second_type))

   529

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

   530

  if  (is_ANY_SAFEINT_type(second_type)   && is_ANY_INT_type(first_type))