1 /* |
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2 * matiec - a compiler for the programming languages defined in IEC 61131-3 |
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3 * |
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4 * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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5 * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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6 * |
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7 * This program is free software: you can redistribute it and/or modify |
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8 * it under the terms of the GNU General Public License as published by |
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9 * the Free Software Foundation, either version 3 of the License, or |
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10 * (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, |
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 * GNU General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU General Public License |
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 * |
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20 * |
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21 * This code is made available on the understanding that it will not be |
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22 * used in safety-critical situations without a full and competent review. |
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23 */ |
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24 |
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25 /* |
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26 * An IEC 61131-3 compiler. |
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27 * |
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28 * Based on the |
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29 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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30 * |
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31 */ |
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32 |
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33 /* Determine the data type of a specific constant or variable. |
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34 * A reference to the relevant type definition is returned. |
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35 * |
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36 * For example: |
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37 * 22 -> returns reference to a int_type_name_c object. |
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38 * 22.2 -> returns reference to a real_type_name_c object. |
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39 * LREAL#22.2 -> returns reference to a lreal_type_name_c object. |
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40 * etc... |
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41 */ |
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42 |
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43 |
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44 #include "../util/symtable.hh" |
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45 #include "search_constant_type.hh" |
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46 #include "absyntax_utils.hh" |
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47 #include "../main.hh" // required for ERROR() and ERROR_MSG() macros. |
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48 |
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49 |
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50 |
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51 symbol_c *search_constant_type_c::get_type(symbol_c *constant) { |
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52 return (symbol_c *)constant->accept(*this); |
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53 } |
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54 |
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55 |
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56 /*********************/ |
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57 /* B 1.2 - Constants */ |
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58 /*********************/ |
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59 |
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60 /******************************/ |
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61 /* B 1.2.1 - Numeric Literals */ |
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62 /******************************/ |
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63 /* Numeric literals without any explicit type cast have unknown data type, |
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64 * so we continue considering them as their own basic data types until |
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65 * they can be resolved (for example, when using '30+x' where 'x' is a LINT variable, the |
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66 * numeric literal '30' must then be considered a LINT so the ADD function may be called |
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67 * with all inputs of the same data type. |
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68 * If 'x' were a SINT, then the '30' would have to be a SINT too! |
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69 */ |
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70 void *search_constant_type_c::visit(real_c *symbol) {return (void *)symbol;} |
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71 void *search_constant_type_c::visit(neg_real_c *symbol) {return (void *)symbol;} |
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72 void *search_constant_type_c::visit(integer_c *symbol) {return (void *)symbol;} |
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73 void *search_constant_type_c::visit(neg_integer_c *symbol) {return (void *)symbol;} |
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74 void *search_constant_type_c::visit(binary_integer_c *symbol) {return (void *)symbol;} |
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75 void *search_constant_type_c::visit(octal_integer_c *symbol) {return (void *)symbol;} |
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76 void *search_constant_type_c::visit(hex_integer_c *symbol) {return (void *)symbol;} |
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77 |
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78 void *search_constant_type_c::visit(integer_literal_c *symbol) |
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79 {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));} |
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80 void *search_constant_type_c::visit(real_literal_c *symbol) |
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81 {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));} |
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82 void *search_constant_type_c::visit(bit_string_literal_c *symbol) |
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83 {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));} |
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84 void *search_constant_type_c::visit(boolean_literal_c *symbol) |
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85 {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));} |
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86 |
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87 void *search_constant_type_c::visit(boolean_true_c *symbol) {return (void *)symbol;} |
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88 void *search_constant_type_c::visit(boolean_false_c *symbol) {return (void *)symbol;} |
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89 |
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90 |
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91 /*******************************/ |
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92 /* B.1.2.2 Character Strings */ |
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93 /*******************************/ |
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94 void *search_constant_type_c::visit(double_byte_character_string_c *symbol) {return (void *)&wstring_type_name;} |
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95 void *search_constant_type_c::visit(single_byte_character_string_c *symbol) {return (void *)&string_type_name;} |
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96 |
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97 /***************************/ |
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98 /* B 1.2.3 - Time Literals */ |
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99 /***************************/ |
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100 /************************/ |
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101 /* B 1.2.3.1 - Duration */ |
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102 /************************/ |
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103 void *search_constant_type_c::visit(neg_time_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */ |
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104 void *search_constant_type_c::visit(duration_c *symbol) {return (void *)(symbol->type_name);} |
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105 void *search_constant_type_c::visit(fixed_point_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */ |
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106 void *search_constant_type_c::visit(interval_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */ |
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107 |
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108 /************************************/ |
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109 /* B 1.2.3.2 - Time of day and Date */ |
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110 /************************************/ |
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111 void *search_constant_type_c::visit(time_of_day_c *symbol) {return (void *)(symbol->type_name);} |
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112 void *search_constant_type_c::visit(daytime_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */ |
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113 void *search_constant_type_c::visit(date_c *symbol) {return (void *)(symbol->type_name);} |
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114 void *search_constant_type_c::visit(date_literal_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */ |
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115 void *search_constant_type_c::visit(date_and_time_c *symbol) {return (void *)(symbol->type_name);} |
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116 |
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117 /********************************/ |
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118 /* B 1.3.3 - Derived data types */ |
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119 /********************************/ |
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120 void *search_constant_type_c::visit(enumerated_value_c *symbol) { |
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121 if (symbol->type != NULL) |
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122 return (void *)(symbol->type); |
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123 |
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124 symbol_c *value_type = enumerated_value_symtable.find_value(symbol->value); |
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125 if (value_type == enumerated_value_symtable.end_value()) |
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126 return NULL; |
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127 return (void *)value_type; |
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128 } |
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129 |
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130 |
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131 |
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132 |
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133 invalid_type_name_c search_constant_type_c::invalid_type_name; |
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134 |
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135 |
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136 real_type_name_c search_constant_type_c::real_type_name; |
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137 sint_type_name_c search_constant_type_c::sint_type_name; |
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138 lint_type_name_c search_constant_type_c::lint_type_name; |
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139 dint_type_name_c search_constant_type_c::dint_type_name; |
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140 date_type_name_c search_constant_type_c::date_type_name; |
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141 dword_type_name_c search_constant_type_c::dword_type_name; |
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142 dt_type_name_c search_constant_type_c::dt_type_name; |
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143 tod_type_name_c search_constant_type_c::tod_type_name; |
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144 udint_type_name_c search_constant_type_c::udint_type_name; |
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145 word_type_name_c search_constant_type_c::word_type_name; |
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146 wstring_type_name_c search_constant_type_c::wstring_type_name; |
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147 string_type_name_c search_constant_type_c::string_type_name; |
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148 lword_type_name_c search_constant_type_c::lword_type_name; |
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149 uint_type_name_c search_constant_type_c::uint_type_name; |
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150 lreal_type_name_c search_constant_type_c::lreal_type_name; |
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151 byte_type_name_c search_constant_type_c::byte_type_name; |
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152 usint_type_name_c search_constant_type_c::usint_type_name; |
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153 ulint_type_name_c search_constant_type_c::ulint_type_name; |
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154 bool_type_name_c search_constant_type_c::bool_type_name; |
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155 time_type_name_c search_constant_type_c::time_type_name; |
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156 int_type_name_c search_constant_type_c::int_type_name; |
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157 |
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158 safetime_type_name_c search_constant_type_c::safetime_type_name; |
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159 safetod_type_name_c search_constant_type_c::safetod_type_name; |
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160 safedt_type_name_c search_constant_type_c::safedt_type_name; |
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161 safedate_type_name_c search_constant_type_c::safedate_type_name; |
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162 safereal_type_name_c search_constant_type_c::safereal_type_name; |
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163 safesint_type_name_c search_constant_type_c::safesint_type_name; |
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164 safelint_type_name_c search_constant_type_c::safelint_type_name; |
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165 safedint_type_name_c search_constant_type_c::safedint_type_name; |
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166 safedword_type_name_c search_constant_type_c::safedword_type_name; |
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167 safeudint_type_name_c search_constant_type_c::safeudint_type_name; |
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168 safeword_type_name_c search_constant_type_c::safeword_type_name; |
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169 safewstring_type_name_c search_constant_type_c::safewstring_type_name; |
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170 safestring_type_name_c search_constant_type_c::safestring_type_name; |
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171 safelword_type_name_c search_constant_type_c::safelword_type_name; |
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172 safeuint_type_name_c search_constant_type_c::safeuint_type_name; |
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173 safelreal_type_name_c search_constant_type_c::safelreal_type_name; |
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174 safebyte_type_name_c search_constant_type_c::safebyte_type_name; |
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175 safeusint_type_name_c search_constant_type_c::safeusint_type_name; |
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176 safeulint_type_name_c search_constant_type_c::safeulint_type_name; |
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177 safebool_type_name_c search_constant_type_c::safebool_type_name; |
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178 safeint_type_name_c search_constant_type_c::safeint_type_name; |
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179 |
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180 |
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