lbessard@111: /*
lbessard@111:  * (c) 2003 Mario de Sousa
lbessard@111:  *
lbessard@111:  * Offered to the public under the terms of the GNU General Public License
lbessard@111:  * as published by the Free Software Foundation; either version 2 of the
lbessard@111:  * License, or (at your option) any later version.
lbessard@111:  *
lbessard@111:  * This program is distributed in the hope that it will be useful, but
lbessard@111:  * WITHOUT ANY WARRANTY; without even the implied warranty of
lbessard@111:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
lbessard@111:  * Public License for more details.
lbessard@111:  *
lbessard@111:  * This code is made available on the understanding that it will not be
lbessard@111:  * used in safety-critical situations without a full and competent review.
lbessard@111:  */
lbessard@111: 
lbessard@111: /*
lbessard@111:  * An IEC 61131-3 IL and ST compiler.
lbessard@111:  *
lbessard@111:  * Based on the
lbessard@111:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
lbessard@111:  *
lbessard@111:  */
lbessard@111: 
lbessard@111: 
lbessard@111: /* Returns the function block declaration symbol
lbessard@111:  * of a specific function block type.
lbessard@111:  */
lbessard@111: 
lbessard@111: class search_fb_typedecl_c: public search_visitor_c {
lbessard@111:   
lbessard@111:   private:
lbessard@111:     symbol_c *search_scope;
lbessard@111: 
lbessard@111:     symbol_c *search_name;
lbessard@111:     
lbessard@111:   public:
lbessard@111:     search_fb_typedecl_c(symbol_c *search_scope) {
lbessard@111:       this->search_scope = search_scope;
lbessard@111:     }
lbessard@111:     
lbessard@111:       symbol_c *get_decl(symbol_c *fb_type_name) {
lbessard@111:       this->search_name = fb_type_name;
lbessard@111:       return (symbol_c *)search_scope->accept(*this);
lbessard@111:     }
lbessard@111: 
lbessard@111:   public:
lbessard@111: /**************************************/
lbessard@111: /* B.1.5 - Program organization units */
lbessard@111: /**************************************/
lbessard@111: 
lbessard@111: /*****************************/
lbessard@111: /* B 1.5.2 - Function Blocks */
lbessard@111: /*****************************/
lbessard@111:     void *visit(function_block_declaration_c *symbol) {
lbessard@111:       if (compare_identifiers(symbol->fblock_name, search_name) == 0)
lbessard@111:         return symbol;
lbessard@111:       return NULL;
lbessard@111:     }
lbessard@111: 
lbessard@111: /**********************/
lbessard@111: /* B 1.5.3 - Programs */
lbessard@111: /**********************/
lbessard@111:     void *visit(program_declaration_c *symbol) {
lbessard@111:       if (compare_identifiers(symbol->program_type_name, search_name) == 0)
lbessard@111:         return symbol;
lbessard@111:       return NULL;
lbessard@111:     }
lbessard@111: };
lbessard@111: 
lbessard@111: 
lbessard@111: 
lbessard@111: