1 /*

     2  * (c) 2003 Mario de Sousa

     3  *

     4  * Offered to the public under the terms of the GNU General Public License

     5  * as published by the Free Software Foundation; either version 2 of the

     6  * License, or (at your option) any later version.

     7  *

     8  * This program is distributed in the hope that it will be useful, but

     9  * WITHOUT ANY WARRANTY; without even the implied warranty of

    10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General

    11  * Public License for more details.

    12  *

    13  * This code is made available on the understanding that it will not be

    14  * used in safety-critical situations without a full and competent review.

    15  */

    16 

    17 /*

    18  * An IEC 61131-3 IL and ST compiler.

    19  *

    20  * Based on the

    21  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

    22  *

    23  */

    24 

    25 

    26 /* Returns the function block declaration symbol

    27  * of a specific function block type.

    28  */

    29 

    30 class search_fb_typedecl_c: public search_visitor_c {

    31   

    32   private:

    33     symbol_c *search_scope;

    34 

    35     symbol_c *search_name;

    36     

    37   public:

    38     search_fb_typedecl_c(symbol_c *search_scope) {

    39       this->search_scope = search_scope;

    40     }

    41     

    42       symbol_c *get_decl(symbol_c *fb_type_name) {

    43       this->search_name = fb_type_name;

    44       return (symbol_c *)search_scope->accept(*this);

    45     }

    46 

    47   public:

    48 /**************************************/

    49 /* B.1.5 - Program organization units */

    50 /**************************************/

    51 

    52 /*****************************/

    53 /* B 1.5.2 - Function Blocks */

    54 /*****************************/

    55     void *visit(function_block_declaration_c *symbol) {

    56       if (compare_identifiers(symbol->fblock_name, search_name) == 0)

    57         return symbol;

    58       return NULL;

    59     }

    60 

    61 /**********************/

    62 /* B 1.5.3 - Programs */

    63 /**********************/

    64     void *visit(program_declaration_c *symbol) {

    65       if (compare_identifiers(symbol->program_type_name, search_name) == 0)

    66         return symbol;

    67       return NULL;

    68     }

    69 };

    70 

    71 

    72 

    73