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/*
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* (c) 2007 Mario de Sousa and Laurent Bessard
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*
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* Offered to the public under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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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 IL and ST 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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/*
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* This is one of the versions available for the 4th stage.
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*
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* This 4th stage generates a c++ source program equivalent
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* to the IL and ST code.
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*/
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//#include <stdio.h> /* required for NULL */
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//#include <string>
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//#include <iostream>
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//#include "../../util/symtable.hh"
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typedef struct
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{
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symbol_c *symbol;
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} SYMBOL;
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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class generate_var_list_c: protected generate_c_typedecl_c {
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private:
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symbol_c *current_var_type_symbol;
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unsigned int current_var_number;
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unsigned int step_number;
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unsigned int transition_number;
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unsigned int action_number;
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std::list<SYMBOL> current_symbol_list;
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search_base_type_c search_base_type;
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search_fb_typedecl_c *search_fb_typedecl;
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public:
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generate_var_list_c(stage4out_c *s4o_ptr, symbol_c *scope)
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: generate_c_typedecl_c(s4o_ptr) {
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search_fb_typedecl = new search_fb_typedecl_c(scope);
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current_var_type_symbol = NULL;
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current_var_number = 0;
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}
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~generate_var_list_c(void) {
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delete search_fb_typedecl;
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}
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void update_var_type_symbol(symbol_c *symbol, bool is_fb = false) {
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this->current_var_type_symbol = spec_init_sperator_c::get_spec(symbol);
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if (this->current_var_type_symbol == NULL)
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ERROR;
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if (is_fb)
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this->current_var_type_symbol = search_fb_typedecl->get_decl(this->current_var_type_symbol);
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else
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this->current_var_type_symbol = (symbol_c *)(this->current_var_type_symbol->accept(search_base_type));
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if (this->current_var_type_symbol == NULL)
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ERROR;
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}
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void reset_var_type_symbol(void) {
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this->current_var_type_symbol = NULL;
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}
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void declare_variables(symbol_c *symbol, bool is_fb = false) {
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list_c *list = dynamic_cast<list_c *>(symbol);
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/* should NEVER EVER occur!! */
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if (list == NULL) ERROR;
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for(int i = 0; i < list->n; i++) {
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declare_variable(list->elements[i], is_fb);
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}
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}
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void declare_variable(symbol_c *symbol, bool is_fb = false) {
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if (is_fb) {
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SYMBOL *current_name;
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current_name = new SYMBOL;
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current_name->symbol = symbol;
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current_symbol_list.push_back(*current_name);
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this->current_var_type_symbol->accept(*this);
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current_symbol_list.pop_back();
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}
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else {
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print_var_number();
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s4o.print(";");
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print_symbol_list();
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symbol->accept(*this);
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s4o.print(";");
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print_symbol_list();
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symbol->accept(*this);
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s4o.print(";");
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this->current_var_type_symbol->accept(*this);
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s4o.print(";\n");
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}
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}
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void print_var_number(void) {
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char str[10];
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sprintf(str, "%d", current_var_number);
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s4o.print(str);
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current_var_number++;
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}
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void print_step_number(void) {
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char str[10];
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sprintf(str, "%d", step_number);
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s4o.print(str);
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}
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void print_transition_number(void) {
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char str[10];
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sprintf(str, "%d", transition_number);
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s4o.print(str);
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}
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void print_action_number(void) {
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char str[10];
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sprintf(str, "%d", action_number);
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s4o.print(str);
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}
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void print_symbol_list(void) {
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std::list<SYMBOL>::iterator pt;
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for(pt = current_symbol_list.begin(); pt != current_symbol_list.end(); pt++) {
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pt->symbol->accept(*this);
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s4o.print(".");
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}
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}
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/********************************************/
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/* B.1.4.3 Declaration and initilization */
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/********************************************/
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/* [variable_name] location ':' located_var_spec_init */
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/* variable_name -> may be NULL ! */
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//SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
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void *visit(located_var_decl_c *symbol) {
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol->located_var_spec_init);
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if (symbol->variable_name != NULL)
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declare_variable(symbol->variable_name);
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current_var_type_symbol = NULL;
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return NULL;
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}
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/* var1_list ':' array_spec_init */
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// SYM_REF2(array_var_init_decl_c, var1_list, array_spec_init)
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void *visit(array_var_init_decl_c *symbol) {
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TRACE("array_var_init_decl_c");
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol->array_spec_init);
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declare_variables(symbol->var1_list);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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return NULL;
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}
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/* var1_list ':' initialized_structure */
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// SYM_REF2(structured_var_init_decl_c, var1_list, initialized_structure)
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void *visit(structured_var_init_decl_c *symbol) {
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TRACE("structured_var_init_decl_c");
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/* Please read the comments inside the var1_init_decl_c
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* visitor, as they apply here too.
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*/
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol->initialized_structure);
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/* now to produce the c equivalent... */
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declare_variables(symbol->var1_list);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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return NULL;
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}
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/* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */
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/* structure_initialization -> may be NULL ! */
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void *visit(fb_name_decl_c *symbol) {
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TRACE("fb_name_decl_c");
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/* Please read the comments inside the var1_init_decl_c
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* visitor, as they apply here too.
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*/
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol, true);
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/* now to produce the c equivalent... */
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declare_variables(symbol->fb_name_list, true);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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return NULL;
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}
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/* global_var_name ':' (simple_specification|subrange_specification|enumerated_specification|array_specification|prev_declared_structure_type_name|function_block_type_name */
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//SYM_REF2(external_declaration_c, global_var_name, specification)
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void *visit(external_declaration_c *symbol) {
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TRACE("external_declaration_c");
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/* Please read the comments inside the var1_init_decl_c
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* visitor, as they apply here too.
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*/
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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this->current_var_type_symbol = (symbol_c *)(symbol->specification->accept(*search_fb_typedecl));
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if (this->current_var_type_symbol == NULL) {
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this->current_var_type_symbol = symbol->specification;
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declare_variable(symbol->global_var_name);
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}
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else
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declare_variable(symbol->global_var_name, true);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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return NULL;
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}
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/*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
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/* type_specification ->may be NULL ! */
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// SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
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void *visit(global_var_decl_c *symbol) {
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TRACE("global_var_decl_c");
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/* Please read the comments inside the var1_init_decl_c
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* visitor, as they apply here too.
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*/
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol->type_specification);
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/* now to produce the c equivalent... */
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symbol->global_var_spec->accept(*this);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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return NULL;
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}
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void *visit(global_var_list_c *symbol) {
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declare_variables(symbol);
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return NULL;
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}
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/*| global_var_name location */
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// SYM_REF2(global_var_spec_c, global_var_name, location)
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void *visit(global_var_spec_c *symbol) {
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if (symbol->global_var_name != NULL)
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declare_variable(symbol->global_var_name);
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return NULL;
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}
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void *visit(var1_init_decl_c *symbol) {
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TRACE("var1_init_decl_c");
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/* Start off by setting the current_var_type_symbol and
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* current_var_init_symbol private variables...
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*/
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update_var_type_symbol(symbol->spec_init);
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/* now to produce the c equivalent... */
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declare_variables(symbol->var1_list);
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/* Values no longer in scope, and therefore no longer used.
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* Make an effort to keep them set to NULL when not in use
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* in order to catch bugs as soon as possible...
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*/
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reset_var_type_symbol();
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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 1.5.2 - Function Blocks */
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/*****************************/
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void *visit(function_block_declaration_c *symbol) {
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symbol->var_declarations->accept(*this);
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symbol->fblock_body->accept(*this);
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return NULL;
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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 *visit(program_declaration_c *symbol) {
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symbol->var_declarations->accept(*this);
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symbol->function_block_body->accept(*this);
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return NULL;
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}
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/**********************************************/
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/* B 1.6 - Sequential function chart elements */
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367 |
/**********************************************/
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|
|
368 |
|
|
|
369 |
/* | sequential_function_chart sfc_network */
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|
370 |
//SYM_LIST(sequential_function_chart_c)
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|
|
371 |
void *visit(sequential_function_chart_c *symbol) {
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|
|
372 |
step_number = 0;
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|
373 |
transition_number = 0;
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|
|
374 |
action_number = 0;
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|
|
375 |
for(int i = 0; i < symbol->n; i++) {
|
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|
376 |
symbol->elements[i]->accept(*this);
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|
|
377 |
}
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|
378 |
return NULL;
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|
|
379 |
}
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|
|
380 |
|
|
|
381 |
/* INITIAL_STEP step_name ':' action_association_list END_STEP */
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|
382 |
//SYM_REF2(initial_step_c, step_name, action_association_list)
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|
383 |
void *visit(initial_step_c *symbol) {
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|
|
384 |
print_var_number();
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|
385 |
s4o.print(";");
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|
|
386 |
print_symbol_list();
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|
|
387 |
symbol->step_name->accept(*this);
|
|
|
388 |
s4o.print(".X;");
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|
|
389 |
print_symbol_list();
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|
|
390 |
s4o.print("step_list[");
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|
|
391 |
print_step_number();
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|
|
392 |
s4o.print("].state;STEP;\n");
|
|
|
393 |
step_number++;
|
|
|
394 |
return NULL;
|
|
|
395 |
}
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|
|
396 |
|
|
|
397 |
/* STEP step_name ':' action_association_list END_STEP */
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|
|
398 |
//SYM_REF2(step_c, step_name, action_association_list)
|
|
|
399 |
void *visit(step_c *symbol) {
|
|
|
400 |
print_var_number();
|
|
|
401 |
s4o.print(";");
|
|
|
402 |
print_symbol_list();
|
|
|
403 |
symbol->step_name->accept(*this);
|
|
|
404 |
s4o.print(".X;");
|
|
|
405 |
print_symbol_list();
|
|
|
406 |
s4o.print("step_list[");
|
|
|
407 |
print_step_number();
|
|
|
408 |
s4o.print("].state;STEP;\n");
|
|
|
409 |
step_number++;
|
|
|
410 |
return NULL;
|
|
|
411 |
}
|
|
|
412 |
|
|
|
413 |
/* TRANSITION [transition_name] ['(' PRIORITY ASSIGN integer ')']
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|
|
414 |
* FROM steps TO steps
|
|
|
415 |
* transition_condition
|
|
|
416 |
* END_TRANSITION
|
|
|
417 |
*/
|
|
|
418 |
/* transition_name -> may be NULL ! */
|
|
|
419 |
/* integer -> may be NULL ! */
|
|
|
420 |
//SYM_REF5(transition_c, transition_name, integer, from_steps, to_steps, transition_condition)
|
|
|
421 |
void *visit(transition_c *symbol) {
|
|
|
422 |
print_var_number();
|
|
|
423 |
s4o.print(";");
|
|
|
424 |
print_symbol_list();
|
|
|
425 |
symbol->from_steps->accept(*this);
|
|
|
426 |
s4o.print("->");
|
|
|
427 |
symbol->to_steps->accept(*this);
|
|
|
428 |
s4o.print(";");
|
|
|
429 |
print_symbol_list();
|
|
|
430 |
s4o.print("transition_list[");
|
|
|
431 |
print_transition_number();
|
|
|
432 |
s4o.print("];TRANSITION;\n");
|
|
|
433 |
transition_number++;
|
|
|
434 |
return NULL;
|
|
|
435 |
}
|
|
|
436 |
|
|
|
437 |
/* step_name | '(' step_name_list ')' */
|
|
|
438 |
/* step_name -> may be NULL ! */
|
|
|
439 |
/* step_name_list -> may be NULL ! */
|
|
|
440 |
//SYM_REF2(steps_c, step_name, step_name_list)
|
|
|
441 |
void *visit(steps_c *symbol) {
|
|
|
442 |
if (symbol->step_name != NULL)
|
|
|
443 |
symbol->step_name->accept(*this);
|
|
|
444 |
if (symbol->step_name_list != NULL)
|
|
|
445 |
symbol->step_name_list->accept(*this);
|
|
|
446 |
return NULL;
|
|
|
447 |
}
|
|
|
448 |
|
|
|
449 |
/* | step_name_list ',' step_name */
|
|
|
450 |
//SYM_LIST(step_name_list_c)
|
|
|
451 |
void *visit(step_name_list_c *symbol) {
|
|
|
452 |
for(int i = 0; i < symbol->n; i++) {
|
|
|
453 |
symbol->elements[i]->accept(*this);
|
|
|
454 |
if (i < symbol->n - 1)
|
|
|
455 |
s4o.print(",");
|
|
|
456 |
}
|
|
|
457 |
return NULL;
|
|
|
458 |
}
|
|
|
459 |
|
|
|
460 |
/* ACTION action_name ':' function_block_body END_ACTION */
|
|
|
461 |
//SYM_REF2(action_c, action_name, function_block_body)
|
|
|
462 |
void *visit(action_c *symbol) {
|
|
|
463 |
print_var_number();
|
|
|
464 |
s4o.print(";");
|
|
|
465 |
print_symbol_list();
|
|
|
466 |
symbol->action_name->accept(*this);
|
|
|
467 |
s4o.print(".Q;");
|
|
|
468 |
print_symbol_list();
|
|
|
469 |
s4o.print("action_list[");
|
|
|
470 |
print_action_number();
|
|
|
471 |
s4o.print("].state;ACTION;\n");
|
|
|
472 |
action_number++;
|
|
|
473 |
return NULL;
|
|
|
474 |
}
|
|
|
475 |
|
|
|
476 |
|
|
|
477 |
/**************************************/
|
|
|
478 |
/* B.1.7 - Configuration elements */
|
|
|
479 |
/**************************************/
|
|
|
480 |
|
|
|
481 |
/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
|
|
|
482 |
//SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused)
|
|
|
483 |
void *visit(program_configuration_c *symbol) {
|
|
|
484 |
|
|
|
485 |
/* Start off by setting the current_var_type_symbol and
|
|
|
486 |
* current_var_init_symbol private variables...
|
|
|
487 |
*/
|
|
|
488 |
update_var_type_symbol(symbol->program_type_name, true);
|
|
|
489 |
|
|
|
490 |
declare_variable(symbol->program_name, true);
|
|
|
491 |
|
|
|
492 |
/* Values no longer in scope, and therefore no longer used.
|
|
|
493 |
* Make an effort to keep them set to NULL when not in use
|
|
|
494 |
* in order to catch bugs as soon as possible...
|
|
|
495 |
*/
|
|
|
496 |
reset_var_type_symbol();
|
|
|
497 |
|
|
|
498 |
return NULL;
|
|
|
499 |
}
|
|
|
500 |
|
|
|
501 |
/* CONFIGURATION configuration_name
|
|
|
502 |
* optional_global_var_declarations
|
|
|
503 |
* (resource_declaration_list | single_resource_declaration)
|
|
|
504 |
* optional_access_declarations
|
|
|
505 |
* optional_instance_specific_initializations
|
|
|
506 |
* END_CONFIGURATION
|
|
|
507 |
*/
|
|
|
508 |
//SYM_REF5(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations)
|
|
|
509 |
void *visit(configuration_declaration_c *symbol) {
|
|
|
510 |
SYMBOL *current_name;
|
|
|
511 |
current_name = new SYMBOL;
|
|
|
512 |
current_name->symbol = symbol->configuration_name;
|
|
|
513 |
current_symbol_list.push_back(*current_name);
|
|
|
514 |
symbol->resource_declarations->accept(*this);
|
|
|
515 |
current_symbol_list.pop_back();
|
|
|
516 |
return NULL;
|
|
|
517 |
}
|
|
|
518 |
|
|
|
519 |
/* RESOURCE resource_name ON resource_type_name
|
|
|
520 |
* optional_global_var_declarations
|
|
|
521 |
* single_resource_declaration
|
|
|
522 |
* END_RESOURCE
|
|
|
523 |
*/
|
|
|
524 |
//SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
|
|
|
525 |
void *visit(resource_declaration_c *symbol) {
|
|
|
526 |
SYMBOL *current_name;
|
|
|
527 |
current_name = new SYMBOL;
|
|
|
528 |
current_name->symbol = symbol->resource_name;
|
|
|
529 |
current_symbol_list.push_back(*current_name);
|
|
|
530 |
|
|
|
531 |
if (symbol->global_var_declarations != NULL)
|
|
|
532 |
symbol->global_var_declarations->accept(*this);
|
|
|
533 |
|
|
|
534 |
symbol->resource_declaration->accept(*this);
|
|
|
535 |
|
|
|
536 |
current_symbol_list.pop_back();
|
|
|
537 |
return NULL;
|
|
|
538 |
}
|
|
|
539 |
|
|
|
540 |
/* task_configuration_list program_configuration_list */
|
|
|
541 |
//SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
|
|
|
542 |
void *visit(single_resource_declaration_c *symbol) {
|
|
|
543 |
symbol->program_configuration_list->accept(*this);
|
|
|
544 |
return NULL;
|
|
|
545 |
}
|
|
|
546 |
|
|
|
547 |
|
|
|
548 |
/*************************************/
|
|
|
549 |
/* B 2.1 - Instructions and operands */
|
|
|
550 |
/*************************************/
|
|
|
551 |
void *visit(instruction_list_c *symbol) {
|
|
|
552 |
return NULL;
|
|
|
553 |
}
|
|
|
554 |
|
|
|
555 |
/************************/
|
|
|
556 |
/* B 3.2 - Statements */
|
|
|
557 |
/************************/
|
|
|
558 |
void *visit(statement_list_c *symbol) {
|
|
|
559 |
return NULL;
|
|
|
560 |
}
|
|
|
561 |
|
|
|
562 |
};
|