Variable forcing now uses limited list and buffer instead of systematical instance tree traversal and in-tree "fvalue" to keep track of forced value for pointed variables (external, located). Pointer swapping is performed when forcing externals and located, with backup being restored when forcing is reset. Match Beremiz commit 93ad018fb602.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt)
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
/*
* An IEC 61131-3 compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/*
* Search for a specific label in an IL list.
*
* when instantiated, must be given a pointer to one of the following
* - function_declaration_c
* - function_block_declaration_c
* - program_declaration_c
* - instruction_list_c
*
* which is where all calls to search for a specific label will look for said label.
*/
#include "../absyntax_utils/absyntax_utils.hh"
class search_il_label_c: public search_visitor_c {
private:
search_varfb_instance_type_c *search_varfb_instance_type;
symbol_c *search_scope;
symbol_c *search_label;
public:
search_il_label_c(symbol_c *search_scope);
virtual ~search_il_label_c(void);
il_instruction_c *find_label(const char *label);
il_instruction_c *find_label(symbol_c *label);
/****************************************/
/* B.2 - Language IL (Instruction List) */
/****************************************/
/***********************************/
/* B 2.1 Instructions and Operands */
/***********************************/
// void *visit(instruction_list_c *symbol);
void *visit(il_instruction_c *symbol);
// void *visit(il_simple_operation_c *symbol);
// void *visit(il_function_call_c *symbol);
// void *visit(il_expression_c *symbol);
// void *visit(il_fb_call_c *symbol);
// void *visit(il_formal_funct_call_c *symbol);
// void *visit(il_operand_list_c *symbol);
// void *visit(simple_instr_list_c *symbol);
// void *visit(il_simple_instruction_c*symbol);
// void *visit(il_param_list_c *symbol);
// void *visit(il_param_assignment_c *symbol);
// void *visit(il_param_out_assignment_c *symbol);
}; // search_il_label_c