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1 /* |
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2 * (c) 2003 Mario de Sousa |
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3 * |
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4 * Offered to the public under the terms of the GNU General Public License |
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5 * as published by the Free Software Foundation; either version 2 of the |
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6 * License, or (at your option) any later version. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, but |
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9 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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11 * Public License for more details. |
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12 * |
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13 * This code is made available on the understanding that it will not be |
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14 * used in safety-critical situations without a full and competent review. |
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15 */ |
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16 |
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17 /* |
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18 * An IEC 61131-3 IL and ST compiler. |
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19 * |
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20 * Based on the |
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21 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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22 * |
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23 */ |
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24 |
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25 |
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26 /* Determine the data type on which another data type is based on. |
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27 * If a new default initial value is given, we DO NOT consider it a |
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28 * new base class, and continue looking further! |
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29 * |
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30 * E.g. TYPE new_int_t : INT; END_TYPE; |
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31 * TYPE new_int2_t : INT = 2; END_TYPE; |
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32 * TYPE new_subr_t : INT (4..5); END_TYPE; |
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33 * |
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34 * new_int_t is really an INT!! |
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35 * new_int2_t is also really an INT!! |
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36 * new_subr_t is also really an INT!! |
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37 */ |
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38 |
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39 |
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40 class search_base_type_c: public null_visitor_c { |
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41 |
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42 private: |
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43 symbol_c *current_type_name; |
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44 bool is_subrange; |
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45 bool is_enumerated; |
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46 |
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47 public: |
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48 search_base_type_c(void); |
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49 |
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50 public: |
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51 void *visit(identifier_c *type_name); |
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52 bool type_is_subrange(symbol_c* type_decl); |
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53 bool type_is_enumerated(symbol_c* type_decl); |
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54 |
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55 public: |
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56 /***********************************/ |
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57 /* B 1.3.1 - Elementary Data Types */ |
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58 /***********************************/ |
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59 void *visit(time_type_name_c *symbol); |
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60 void *visit(bool_type_name_c *symbol); |
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61 void *visit(sint_type_name_c *symbol); |
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62 void *visit(int_type_name_c *symbol); |
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63 void *visit(dint_type_name_c *symbol); |
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64 void *visit(lint_type_name_c *symbol); |
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65 void *visit(usint_type_name_c *symbol); |
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66 void *visit(uint_type_name_c *symbol); |
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67 void *visit(udint_type_name_c *symbol); |
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68 void *visit(ulint_type_name_c *symbol); |
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69 void *visit(real_type_name_c *symbol); |
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70 void *visit(lreal_type_name_c *symbol); |
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71 void *visit(date_type_name_c *symbol); |
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72 void *visit(tod_type_name_c *symbol); |
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73 void *visit(dt_type_name_c *symbol) ; |
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74 void *visit(byte_type_name_c *symbol); |
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75 void *visit(word_type_name_c *symbol); |
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76 void *visit(dword_type_name_c *symbol); |
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77 void *visit(lword_type_name_c *symbol); |
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78 void *visit(string_type_name_c *symbol); |
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79 void *visit(wstring_type_name_c *symbol); |
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80 void *visit(constant_int_type_name_c *symbol); |
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81 void *visit(constant_real_type_name_c *symbol); |
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82 void *visit(direct_variable_type_name_c *symbol); |
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83 |
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84 /******************************************************/ |
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85 /* Extensions to the base standard as defined in */ |
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86 /* "Safety Software Technical Specification, */ |
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87 /* Part 1: Concepts and Function Blocks, */ |
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88 /* Version 1.0 – Official Release" */ |
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89 /* by PLCopen - Technical Committee 5 - 2006-01-31 */ |
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90 /******************************************************/ |
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91 void *visit(safebool_type_name_c *symbol); |
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92 |
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93 /********************************/ |
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94 /* B 1.3.3 - Derived data types */ |
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95 /********************************/ |
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96 /* simple_type_name ':' simple_spec_init */ |
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97 void *visit(simple_type_declaration_c *symbol); |
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98 /* simple_specification ASSIGN constant */ |
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99 void *visit(simple_spec_init_c *symbol); |
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100 /* subrange_type_name ':' subrange_spec_init */ |
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101 void *visit(subrange_type_declaration_c *symbol); |
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102 /* subrange_specification ASSIGN signed_integer */ |
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103 void *visit(subrange_spec_init_c *symbol); |
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104 /* integer_type_name '(' subrange')' */ |
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105 void *visit(subrange_specification_c *symbol); |
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106 /* signed_integer DOTDOT signed_integer */ |
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107 void *visit(subrange_c *symbol); |
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108 |
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109 /* enumerated_type_name ':' enumerated_spec_init */ |
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110 void *visit(enumerated_type_declaration_c *symbol); |
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111 /* enumerated_specification ASSIGN enumerated_value */ |
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112 void *visit(enumerated_spec_init_c *symbol); |
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113 /* helper symbol for enumerated_specification->enumerated_spec_init */ |
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114 /* enumerated_value_list ',' enumerated_value */ |
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115 void *visit(enumerated_value_list_c *symbol); |
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116 /* enumerated_type_name '#' identifier */ |
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117 // SYM_REF2(enumerated_value_c, type, value) |
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118 void *visit(enumerated_value_c *symbol); |
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119 /* identifier ':' array_spec_init */ |
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120 void *visit(array_type_declaration_c *symbol); |
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121 /* array_specification [ASSIGN array_initialization} */ |
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122 /* array_initialization may be NULL ! */ |
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123 void *visit(array_spec_init_c *symbol); |
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124 /* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */ |
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125 void *visit(array_specification_c *symbol); |
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126 /* helper symbol for array_specification */ |
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127 /* array_subrange_list ',' subrange */ |
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128 void *visit(array_subrange_list_c *symbol); |
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129 /* array_initialization: '[' array_initial_elements_list ']' */ |
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130 /* helper symbol for array_initialization */ |
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131 /* array_initial_elements_list ',' array_initial_elements */ |
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132 void *visit(array_initial_elements_list_c *symbol); |
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133 /* integer '(' [array_initial_element] ')' */ |
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134 /* array_initial_element may be NULL ! */ |
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135 void *visit(array_initial_elements_c *symbol); |
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136 /* structure_type_name ':' structure_specification */ |
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137 /* NOTE: structure_specification will point to either a |
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138 * initialized_structure_c |
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139 * OR A |
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140 * structure_element_declaration_list_c |
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141 */ |
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142 void *visit(structure_type_declaration_c *symbol); |
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143 /* structure_type_name ASSIGN structure_initialization */ |
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144 /* structure_initialization may be NULL ! */ |
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145 void *visit(initialized_structure_c *symbol); |
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146 /* helper symbol for structure_declaration */ |
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147 /* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */ |
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148 /* structure_element_declaration_list structure_element_declaration ';' */ |
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149 void *visit(structure_element_declaration_list_c *symbol); |
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150 /* structure_element_name ':' *_spec_init */ |
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151 void *visit(structure_element_declaration_c *symbol); |
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152 /* helper symbol for structure_initialization */ |
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153 /* structure_initialization: '(' structure_element_initialization_list ')' */ |
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154 /* structure_element_initialization_list ',' structure_element_initialization */ |
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155 void *visit(structure_element_initialization_list_c *symbol); |
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156 /* structure_element_name ASSIGN value */ |
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157 void *visit(structure_element_initialization_c *symbol); |
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158 /* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ |
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159 /* |
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160 SYM_REF4(string_type_declaration_c, string_type_name, |
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161 elementary_string_type_name, |
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162 string_type_declaration_size, |
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163 string_type_declaration_init) // may be == NULL! |
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164 */ |
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165 void *visit(string_type_declaration_c *symbol); |
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166 }; // search_base_type_c |
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167 |
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168 |
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169 |
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170 |