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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 /* Returns the function block declaration symbol |
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27 * of a specific function block type. |
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28 */ |
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29 |
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30 class search_fb_typedecl_c: public search_visitor_c { |
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31 |
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32 private: |
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33 symbol_c *search_scope; |
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34 |
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35 symbol_c *search_name; |
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36 |
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37 public: |
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38 search_fb_typedecl_c(symbol_c *search_scope) { |
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39 this->search_scope = search_scope; |
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40 } |
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41 |
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42 symbol_c *get_decl(symbol_c *fb_type_name) { |
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43 this->search_name = fb_type_name; |
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44 return (symbol_c *)search_scope->accept(*this); |
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45 } |
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46 |
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47 public: |
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48 /**************************************/ |
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49 /* B.1.5 - Program organization units */ |
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50 /**************************************/ |
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51 |
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52 /*****************************/ |
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53 /* B 1.5.2 - Function Blocks */ |
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54 /*****************************/ |
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55 void *visit(function_block_declaration_c *symbol) { |
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56 if (compare_identifiers(symbol->fblock_name, search_name) == 0) |
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57 return symbol; |
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58 return NULL; |
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59 } |
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60 |
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61 /**********************/ |
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62 /* B 1.5.3 - Programs */ |
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63 /**********************/ |
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64 void *visit(program_declaration_c *symbol) { |
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65 if (compare_identifiers(symbol->program_type_name, search_name) == 0) |
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66 return symbol; |
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67 return NULL; |
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68 } |
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69 }; |
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70 |
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71 |
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72 |
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73 |