author | laurent |
Wed, 29 Jun 2011 12:28:59 +0200 | |
changeset 331 | e08e14782a4f |
parent 279 | c0453b7f99df |
child 706 | 31553c22f318 |
permissions | -rwxr-xr-x |
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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Re-generated std lib related code, with updated headers, updated all forgotten headers
Edouard Tisserant
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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/* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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#include "absyntax_utils.hh" |
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/* Returns the function block type declaration |
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* of a specific function block instance. |
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*/ |
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/* Returns the type name of a specific function block |
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* instance. This class will search the variable |
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* declarations inside the scope given to it |
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* searching for the declaration of the function |
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* block instance. |
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* |
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* The class constructor must be given the search scope |
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* (function, function block or program within which |
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* the function block instance was declared). |
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* |
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* This class will search the tree from the root given to the |
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* constructor. Another option would be to build a symbol table, |
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* and search that instead. Building the symbol table would be done |
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* while visiting the variable declaration objects in the parse |
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* tree. Unfortuantely, generate_c_c does not visit these |
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* objects, delegating it to another class. This means that |
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* we would need another specialised class just to build the |
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* symbol table. We might just as well have a specialised class |
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* that searches the tree itself for the relevant info. This |
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* class is exactly that...! |
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*/ |
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search_fb_instance_decl_c::search_fb_instance_decl_c(symbol_c *search_scope) { |
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this->search_scope = search_scope; |
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this->current_fb_type_name = NULL; |
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} |
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symbol_c *search_fb_instance_decl_c::get_type_name(symbol_c *fb_instance_name) { |
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this->search_name = fb_instance_name; |
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return (symbol_c *)search_scope->accept(*this); |
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} |
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/***************************/ |
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/* B 0 - Programming Model */ |
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/***************************/ |
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void *search_fb_instance_decl_c::visit(library_c *symbol) { |
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/* we do not want to search multiple declaration scopes, |
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* so we do not visit all the functions, fucntion blocks, etc... |
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*/ |
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return NULL; |
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} |
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/******************************************/ |
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/* B 1.4.3 - Declaration & Initialisation */ |
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/******************************************/ |
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/* name_list ':' function_block_type_name ASSIGN structure_initialization */ |
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/* structure_initialization -> may be NULL ! */ |
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void *search_fb_instance_decl_c::visit(fb_name_decl_c *symbol) { |
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current_fb_type_name = symbol->function_block_type_name; |
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return symbol->fb_name_list->accept(*this); |
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} |
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/* name_list ',' fb_name */ |
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void *search_fb_instance_decl_c::visit(fb_name_list_c *symbol) { |
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list_c *list = symbol; |
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for(int i = 0; i < list->n; i++) { |
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if (compare_identifiers(list->elements[i], search_name) == 0) |
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/* by now, current_fb_declaration should be != NULL */ |
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return current_fb_type_name; |
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} |
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return NULL; |
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} |
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/**************************************/ |
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/* B.1.5 - Program organization units */ |
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/**************************************/ |
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/***********************/ |
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/* B 1.5.1 - Functions */ |
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/***********************/ |
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void *search_fb_instance_decl_c::visit(function_declaration_c *symbol) { |
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/* no need to search through all the body, so we only |
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* visit the variable declarations...! |
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*/ |
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return symbol->var_declarations_list->accept(*this); |
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} |
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/*****************************/ |
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/* B 1.5.2 - Function Blocks */ |
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/*****************************/ |
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void *search_fb_instance_decl_c::visit(function_block_declaration_c *symbol) { |
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/* no need to search through all the body, so we only |
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* visit the variable declarations...! |
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*/ |
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return symbol->var_declarations->accept(*this); |
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} |
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/**********************/ |
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/* B 1.5.3 - Programs */ |
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/**********************/ |
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void *search_fb_instance_decl_c::visit(program_declaration_c *symbol) { |
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/* no need to search through all the body, so we only |
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* visit the variable declarations...! |
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*/ |
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return symbol->var_declarations->accept(*this); |
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} |