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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) 2009-2012 Mario de Sousa (msousa@fe.up.pt) |
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5 * Copyright (C) 2012 Manuele Conti (conti.ma@alice.it) |
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6 * |
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7 * |
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8 * This program is free software: you can redistribute it and/or modify |
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9 * it under the terms of the GNU General Public License as published by |
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10 * the Free Software Foundation, either version 3 of the License, or |
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11 * (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, |
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 * GNU General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU General Public License |
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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20 * |
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21 * |
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22 * This code is made available on the understanding that it will not be |
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23 * used in safety-critical situations without a full and competent review. |
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24 */ |
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25 |
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26 /* |
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27 * An IEC 61131-3 compiler. |
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28 * |
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29 * Based on the |
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30 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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31 * |
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32 */ |
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33 |
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34 |
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35 /* |
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36 * TODO: |
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37 * - Check subscript values fall within allowed range. |
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38 * For the checking of subscript values to work correctly, we would need to have constant folding working too: |
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39 * array_var[8 + 99] can not be checked without constant folding. |
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40 * However, even without constant folding range check may be usefull, |
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41 * and later changing it to use the values coming out of constant folding should not be very difficult. |
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42 * |
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43 */ |
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44 |
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45 |
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46 #include "array_range_check.hh" |
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47 |
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48 #define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order) ? (symbol1) : (symbol2)) |
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49 #define LAST_(symbol1, symbol2) (((symbol1)->last_order > (symbol2)->last_order) ? (symbol1) : (symbol2)) |
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50 |
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51 #define STAGE3_ERROR(error_level, symbol1, symbol2, ...) { \ |
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52 if (current_display_error_level >= error_level) { \ |
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53 fprintf(stderr, "%s:%d-%d..%d-%d: error: ", \ |
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54 FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ |
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55 LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ |
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56 fprintf(stderr, __VA_ARGS__); \ |
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57 fprintf(stderr, "\n"); \ |
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58 error_count++; \ |
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59 } \ |
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60 } |
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61 |
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62 |
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63 #define STAGE3_WARNING(symbol1, symbol2, ...) { \ |
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64 fprintf(stderr, "%s:%d-%d..%d-%d: warning: ", \ |
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65 FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ |
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66 LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ |
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67 fprintf(stderr, __VA_ARGS__); \ |
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68 fprintf(stderr, "\n"); \ |
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69 warning_found = true; \ |
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70 } |
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71 |
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72 |
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73 array_range_check_c::array_range_check_c(symbol_c *ignore) { |
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74 error_count = 0; |
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75 current_display_error_level = 0; |
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76 } |
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77 |
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78 array_range_check_c::~array_range_check_c(void) { |
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79 } |
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80 |
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81 int array_range_check_c::get_error_count() { |
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82 return error_count; |
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83 } |
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84 |
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85 void array_range_check_c::check_dimension_count(array_variable_c *symbol) { |
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86 int dimension_count; |
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87 symbol_c *var_decl; |
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88 |
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89 var_decl = search_varfb_instance_type->get_basetype_decl(symbol->subscripted_variable); |
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90 array_dimension_iterator_c array_dimension_iterator(var_decl); |
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91 for (dimension_count = 0; NULL != array_dimension_iterator.next(); dimension_count++); |
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92 if (dimension_count != ((list_c *)symbol->subscript_list)->n) |
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93 STAGE3_ERROR(0, symbol, symbol, "Number of dimensions does not match, Array have %d dimension(s)", dimension_count); |
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94 } |
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95 |
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96 /*********************/ |
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97 /* B 1.4 - Variables */ |
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98 /*********************/ |
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99 /*************************************/ |
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100 /* B 1.4.2 - Multi-element variables */ |
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101 /*************************************/ |
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102 void *array_range_check_c::visit(array_variable_c *symbol) { |
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103 check_dimension_count(symbol); |
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104 return NULL; |
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105 } |
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106 |
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107 |
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108 /**************************************/ |
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109 /* B 1.5 - Program organisation units */ |
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110 /**************************************/ |
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111 /***********************/ |
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112 /* B 1.5.1 - Functions */ |
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113 /***********************/ |
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114 void *array_range_check_c::visit(function_declaration_c *symbol) { |
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115 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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116 // search_var_instance_decl = new search_var_instance_decl_c(symbol); |
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117 symbol->function_body->accept(*this); |
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118 delete search_varfb_instance_type; |
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119 // delete search_var_instance_decl; |
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120 search_varfb_instance_type = NULL; |
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121 // search_var_instance_decl = NULL; |
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122 return NULL; |
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123 } |
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124 |
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125 /*****************************/ |
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126 /* B 1.5.2 - Function blocks */ |
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127 /*****************************/ |
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128 void *array_range_check_c::visit(function_block_declaration_c *symbol) { |
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129 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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130 // search_var_instance_decl = new search_var_instance_decl_c(symbol); |
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131 symbol->fblock_body->accept(*this); |
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132 delete search_varfb_instance_type; |
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133 // delete search_var_instance_decl; |
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134 search_varfb_instance_type = NULL; |
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135 // search_var_instance_decl = NULL; |
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136 return NULL; |
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137 } |
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138 |
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139 /**********************/ |
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140 /* B 1.5.3 - Programs */ |
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141 /**********************/ |
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142 void *array_range_check_c::visit(program_declaration_c *symbol) { |
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143 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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144 // search_var_instance_decl = new search_var_instance_decl_c(symbol); |
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145 symbol->function_block_body->accept(*this); |
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146 delete search_varfb_instance_type; |
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147 // delete search_var_instance_decl; |
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148 search_varfb_instance_type = NULL; |
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149 // search_var_instance_decl = NULL; |
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150 return NULL; |
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151 } |
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152 |
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153 |
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154 |