--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage4/generate_cc/generate_location_list.cc Fri May 18 14:11:09 2007 +0200
@@ -0,0 +1,180 @@
+/*
+ * (c) 2007 Mario de Sousa and Laurent Bessard
+ *
+ * Offered to the public under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2 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.
+ *
+ * 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 IL and ST compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+/*
+ * This is one of the versions available for the 4th stage.
+ *
+ * This 4th stage generates a c++ source program equivalent
+ * to the IL and ST code.
+ */
+
+//#include <stdio.h> /* required for NULL */
+//#include <string>
+//#include <iostream>
+
+//#include "../../util/symtable.hh"
+
+
+
+
+
+
+
+
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+class generate_location_list_c: protected iterator_visitor_c {
+
+ protected:
+ stage4out_c &s4o;
+
+ private:
+ symbol_c *current_var_type_symbol;
+ generate_cc_base_c *generate_cc_base;
+ search_base_type_c search_base_type;
+
+ public:
+ generate_location_list_c(stage4out_c *s4o_ptr): s4o(*s4o_ptr) {
+ generate_cc_base = new generate_cc_base_c(s4o_ptr);
+ current_var_type_symbol = NULL;
+ }
+ ~generate_location_list_c(void) {
+ delete generate_cc_base;
+ }
+
+ bool test_location_type(symbol_c *direct_variable) {
+
+ token_c *location = dynamic_cast<token_c *>(direct_variable);
+
+ if (location == NULL)
+ /* invalid identifiers... */
+ return false;
+
+ switch (location->value[2]) {
+ case 'X': // bit
+ if (typeid(*current_var_type_symbol) == typeid(bool_type_name_c)) return true;
+ break;
+ case 'B': // Byte, 8 bits
+ if (typeid(*current_var_type_symbol) == typeid(sint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(usint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(string_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(byte_type_name_c)) return true;
+ break;
+ case 'W': // Word, 16 bits
+ if (typeid(*current_var_type_symbol) == typeid(int_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(uint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(word_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(wstring_type_name_c)) return true;
+ break;
+ case 'D': // Double, 32 bits
+ if (typeid(*current_var_type_symbol) == typeid(dint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(udint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(real_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(dword_type_name_c)) return true;
+ break;
+ case 'L': // Long, 64 bits
+ if (typeid(*current_var_type_symbol) == typeid(lint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(ulint_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(lreal_type_name_c)) return true;
+ if (typeid(*current_var_type_symbol) == typeid(lword_type_name_c)) return true;
+ break;
+ default:
+ if (typeid(*current_var_type_symbol) == typeid(bool_type_name_c)) return true;
+ }
+ return false;
+ }
+
+/********************************************/
+/* B.1.4.1 Directly Represented Variables */
+/********************************************/
+
+ void *visit(direct_variable_c *symbol) {
+ current_var_type_symbol->accept(*generate_cc_base);
+ s4o.print(" ");
+ /* Do not use print_token() as it will change everything into uppercase */
+ s4o.printlocation(symbol->value);
+ s4o.print("\n");
+ return NULL;
+ }
+
+
+/********************************************/
+/* B.1.4.3 Declaration and initilization */
+/********************************************/
+
+/* [variable_name] location ':' located_var_spec_init */
+/* variable_name -> may be NULL ! */
+//SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
+ void *visit(located_var_decl_c *symbol) {
+ current_var_type_symbol = spec_init_sperator_c::get_spec(symbol->located_var_spec_init);
+ if (current_var_type_symbol == NULL)
+ ERROR;
+
+ current_var_type_symbol = (symbol_c *)(current_var_type_symbol->accept(search_base_type));
+ if (current_var_type_symbol == NULL)
+ ERROR;
+
+ symbol->location->accept(*this);
+
+ current_var_type_symbol = NULL;
+ return NULL;
+ }
+
+/*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
+/* type_specification ->may be NULL ! */
+//SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
+ void *visit(global_var_decl_c *symbol) {
+ current_var_type_symbol = spec_init_sperator_c::get_spec(symbol->type_specification);
+ if (current_var_type_symbol == NULL)
+ ERROR;
+
+ current_var_type_symbol = (symbol_c *)(current_var_type_symbol->accept(search_base_type));
+ if (current_var_type_symbol == NULL)
+ ERROR;
+
+ symbol->global_var_spec->accept(*this);
+
+ current_var_type_symbol = NULL;
+ return NULL;
+ }
+
+/* AT direct_variable */
+//SYM_REF2(location_c, direct_variable, unused)
+ void *visit(location_c *symbol) {
+ if (test_location_type(symbol->direct_variable))
+ symbol->direct_variable->accept(*this);
+ else
+ ERROR;
+ return NULL;
+ }
+
+}; /* generate_location_list_c */