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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  (conti.ma@alice.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

     9

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

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 *  (at your option) any later version.

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 *

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 *  This program is distributed in the hope that it will be useful,

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

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

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

    18

 *  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.

    23

 */

    24

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#include "datatype_functions.hh"

    26

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

    27

    28

/*

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 * 2.5.1.5.6 Functions of time data types

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 * 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[] = {

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	{ &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     },

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    { &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     },

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

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

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    { 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     },

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    { &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     },

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

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    { &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     },

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    { &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 },

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

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    { &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 },

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    { &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 },

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    { &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

   153

 */

   162

   163

/* A helper function... */

   164

bool is_ANY_ELEMENTARY_type(symbol_c *type_symbol) {

   165

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

   166

  return is_ANY_MAGNITUDE_type(type_symbol)

   167

      || is_ANY_BIT_type      (type_symbol)

   168

      || is_ANY_STRING_type   (type_symbol)

   169

      || is_ANY_DATE_type     (type_symbol);

   170

}

   171

   172

/* A helper function... */

   173

bool is_ANY_SAFEELEMENTARY_type(symbol_c *type_symbol) {

   174

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

   175

  return is_ANY_SAFEMAGNITUDE_type(type_symbol)

   176

      || is_ANY_SAFEBIT_type      (type_symbol)

   177

      || is_ANY_SAFESTRING_type   (type_symbol)

   178

      || is_ANY_SAFEDATE_type     (type_symbol);

   179

}

   180

   181

/* A helper function... */

   182

bool is_ANY_ELEMENTARY_compatible(symbol_c *type_symbol) {

   183

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

   184

  /* NOTE: doing

   185

   *          return is_ANY_SAFEELEMENTARY_type() || is_ANY_ELEMENTARY_type()

   186

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

   187

   */

   188

  return is_ANY_MAGNITUDE_compatible(type_symbol)

   189

      || is_ANY_BIT_compatible      (type_symbol)

   190

      || is_ANY_STRING_compatible   (type_symbol)

   191

      || is_ANY_DATE_compatible     (type_symbol);

   192

}

   193

   194

   195

/* A helper function... */

   196

bool is_ANY_MAGNITUDE_type(symbol_c *type_symbol) {

   197

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

   198

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

   199

  return is_ANY_NUM_type(type_symbol);

   200

}

   201

   202

/* A helper function... */

   203

bool is_ANY_SAFEMAGNITUDE_type(symbol_c *type_symbol) {

   204

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

   205

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

   206

  return is_ANY_SAFENUM_type(type_symbol);

   207

}

   208

   209

/* A helper function... */

   210

bool is_ANY_MAGNITUDE_compatible(symbol_c *type_symbol) {

   211

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

   212

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

   213

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

   214

   215

  return is_ANY_NUM_compatible(type_symbol);

   216

}

   217

   218

/* A helper function... */

   219

bool is_ANY_NUM_type(symbol_c *type_symbol) {

   220

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

   221

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

   222

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

   223

  return false;

   224

}

   225

   226

/* A helper function... */

   227

bool is_ANY_SAFENUM_type(symbol_c *type_symbol) {

   228

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

   229

  return is_ANY_SAFEREAL_type(type_symbol)

   230

      || is_ANY_SAFEINT_type (type_symbol);

   231

}

   232

   233

/* A helper function... */

   234

bool is_ANY_NUM_compatible(symbol_c *type_symbol) {

   235

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

   236

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

   237

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

   238

  return false;

   239

}

   240

   241

/* A helper function... */

   242

bool is_ANY_DATE_type(symbol_c *type_symbol) {

   243

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

   244

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

   245

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

   246

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

   247

  return false;

   248

}

   249

   250

/* A helper function... */

   251

bool is_ANY_SAFEDATE_type(symbol_c *type_symbol) {

   252

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

   253

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

   254

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

   255

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

   256

  return false;

   257

}

   258

   259

/* A helper function... */

   260

bool is_ANY_DATE_compatible(symbol_c *type_symbol) {

   261

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

   262

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

   263

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

   264

  return false;

   265

}

   266

   267

/* A helper function... */

   268

bool is_ANY_STRING_type(symbol_c *type_symbol) {

   269

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

   270

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

   271

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

   272

// TODO literal_string ???

   273

  return false;

   274

}

   275

   276

/* A helper function... */

   277

bool is_ANY_SAFESTRING_type(symbol_c *type_symbol) {

   278

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

   279

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

   280

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

   281

  return false;

   282

}

   283

   284

/* A helper function... */

   285

bool is_ANY_STRING_compatible(symbol_c *type_symbol) {

   286

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

   287

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

   288

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

   289

  return false;

   290

}

   291

   292

/* A helper function... */

   293

bool is_ANY_INT_type(symbol_c *type_symbol) {

   294

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

   295

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

   296

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

   297

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

   298

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

   299

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

   300

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

   301

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

   302

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

   303

  return false;

   304

}

   305

   306

/* A helper function... */

   307

bool is_ANY_SAFEINT_type(symbol_c *type_symbol) {

   308

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

   309

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

   310

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

   311

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

   312

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

   313

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

   314

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

   315

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

   316

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

   317

  return false;

   318

}

   319

   320

/* A helper function... */

   321

bool is_ANY_INT_compatible(symbol_c *type_symbol) {

   322

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

   323

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

   324

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

   326

  return false;

   327

}

   328

   329

/* A helper function... */

   330

bool is_ANY_REAL_type(symbol_c *type_symbol) {

   331

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

   332

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

   333

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

   334

  return false;

   335

}

   336

   337

/* A helper function... */

   338

bool is_ANY_SAFEREAL_type(symbol_c *type_symbol) {

   339

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

   340

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

   341

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

   342

  return false;

   343

}

   344

   345

/* A helper function... */

   346

bool is_ANY_REAL_compatible(symbol_c *type_symbol) {

   347

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

   348

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

   349

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

   351

  return false;

   352

}

   353

   354

/* A helper function... */

   355

bool is_ANY_BIT_type(symbol_c *type_symbol) {

   356

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

   357

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

   358

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

   359

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

   360

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

   361

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

   362

  return false;

   363

}

   364

   365

/* A helper function... */

   366

bool is_ANY_SAFEBIT_type(symbol_c *type_symbol) {

   367

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

   368

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

   369

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

   370

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

   371

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

   372

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

   373

  return false;

   374

}

   375

   376

/* A helper function... */

   377

bool is_ANY_BIT_compatible(symbol_c *type_symbol) {

   378

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

   379

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

   380

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

   383

  return false;

   384

}

   385

   386

/* A helper function... */

   387

bool is_BOOL_type(symbol_c *type_symbol) {

   388

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

   389

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

   390

  return false;

   391

}

   392

   393

/* A helper function... */

   394

bool is_SAFEBOOL_type(symbol_c *type_symbol){

   395

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

   396

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

   397

  return false;

   398

}

   399

   400

/* A helper function... */

   401

bool is_ANY_BOOL_compatible(symbol_c *type_symbol) {

   402

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

   403

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

   404

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

   412

/* A helper function... */

   413

bool is_literal_integer_type(symbol_c *type_symbol) {

   414

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

   415

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

   416

  return is_nonneg_literal_integer_type(type_symbol);

   417

}

   418

   419

   420

/* A helper function... */

   421

bool is_nonneg_literal_integer_type(symbol_c *type_symbol) {

   422

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

   423

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

   424

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

   425

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

   426

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

   427

  return false;

   428

}

   429

   430

   431

/* A helper function... */

   432

bool is_literal_real_type(symbol_c *type_symbol) {

   433

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

   434

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

   435

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

   436

  return false;

   437

}

   438

   439

   440

/* A helper function... */

   441

bool is_literal_bool_type(symbol_c *type_symbol) {

   442

  bool_type_name_c bool_t;

   443

   444

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

   445

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

   446

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

   447

  if (is_nonneg_literal_integer_type(type_symbol))

   448

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

   449

  return false;

   450

}

   451

   452

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

   453

 * If no common data type found, return NULL.

   454

 *

   455

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

   456

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

   457

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

   458

 *   e.g. BYTE and 1024 returns NULL

   459

 *        BYTE and 255  returns BYTE

   460

 *

   461

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

   462

 */

   463

   464

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

   465

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

   466

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

   467

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

   468

   469

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

   470

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

   471

   472

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

   473

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

   474

   475

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

   476

    {return first_type;}

   477

   478

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

   479

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

   480

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

   481

   */

   482

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

   483

   484

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

   485

   *       literal bool values are not literal integers...

   486

   */

   487

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

   488

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

   489

   490

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

   491

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

   492

   493

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

   494

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

   495

   496

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

   497

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

   498

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

   499

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

   500

   501

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

   502

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

   503

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

   504

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

   505

   506

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

   507

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

   508

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

   509

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

   510

   511

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

   512

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

   513

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

   514

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

   515

   516

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

   517

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

   518

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

   519

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

   520

   521

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

   522

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

   523

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

   524

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

   525

   526

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

   527

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