--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/search_utils/search_utils.cc	Tue May 26 18:04:27 2009 +0200
@@ -0,0 +1,289 @@
+/*
+ * (c) 2009 Mario de Sousa
+ *
+ * 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 the main stage 3a file.
+ *
+ * In stage 3a some helpful symbol tables are instanciated and populated.
+ * These symbol tables wll then be used by stage3b and atage4 code generators.
+ */
+
+
+
+
+
+
+// #include <stdio.h>  /* required for NULL */
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <typeinfo>
+#include <list>
+#include <strings.h>
+
+#include "../util/symtable.hh"
+#include "../util/dsymtable.hh"
+#include "../absyntax/visitor.hh"
+
+
+
+//#define DEBUG
+#ifdef DEBUG
+#define TRACE(classname) printf("\n____%s____\n",classname);
+#else
+#define TRACE(classname)
+#endif
+
+#define ERROR error_exit(__FILE__,__LINE__)
+/* function defined in main.cc */
+extern void error_exit(const char *file_name, int line_no);
+
+
+
+
+
+/* A symbol table with all globally declared functions... */
+function_declaration_c null_symbol1(NULL,NULL,NULL,NULL);
+dsymtable_c<function_declaration_c *, &null_symbol1> function_symtable;
+
+/* A symbol table with all globally declared functions block types... */
+function_block_declaration_c null_symbol2(NULL,NULL,NULL);
+symtable_c<function_block_declaration_c *, &null_symbol2> function_block_type_symtable;
+
+/* A symbol table with all globally declared program types... */
+program_declaration_c null_symbol3(NULL,NULL,NULL);
+symtable_c<program_declaration_c *, &null_symbol3> program_type_symtable;
+
+/* A symbol table with all user declared type definitions... */
+/* Note that function block types and program types have their
+ * own symbol tables, so do not get placed in this symbol table!
+ */
+symbol_c null_symbol4;
+symtable_c<symbol_c *, &null_symbol4> type_symtable;
+
+
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+/*
+#include "spec_init_separator.cc"
+#include "function_param_iterator.cc"
+#include "function_call_iterator.cc"
+#include "function_call_param_iterator.cc"
+#include "type_initial_value.cc"
+#include "search_fb_instance_decl.cc"
+#include "search_fb_typedecl.cc"
+#include "search_base_type.cc"
+#include "search_var_instance_decl.cc"
+#include "decompose_var_instance_name.cc"
+#include "search_varfb_instance_type.cc"
+#include "search_constant_type.cc"
+#include "search_expression_type.cc"
+
+#include "generate_c_base.cc"
+#include "generate_c_typedecl.cc"
+#include "generate_c_sfcdecl.cc"
+#include "generate_c_vardecl.cc"
+#include "generate_c_configbody.cc"
+#include "generate_location_list.cc"
+#include "generate_var_list.cc"
+*/
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+class populate_symtables_c: public iterator_visitor_c {
+
+  public:
+    populate_symtables_c(void) {};
+    virtual ~populate_symtables_c(void) {}
+
+
+  public:
+
+/*************************/
+/* B.1 - Common elements */
+/*************************/
+/*******************************************/
+/* B 1.1 - Letters, digits and identifiers */
+/*******************************************/
+/*********************/
+/* B 1.2 - Constants */
+/*********************/
+/******************************/
+/* B 1.2.1 - Numeric Literals */
+/******************************/
+/*******************************/
+/* B.1.2.2   Character Strings */
+/*******************************/
+/***************************/
+/* B 1.2.3 - Time Literals */
+/***************************/
+/************************/
+/* B 1.2.3.1 - Duration */
+/************************/
+/************************************/
+/* B 1.2.3.2 - Time of day and Date */
+/************************************/
+/**********************/
+/* B.1.3 - Data types */
+/**********************/
+/***********************************/
+/* B 1.3.1 - Elementary Data Types */
+/***********************************/
+/********************************/
+/* B.1.3.2 - Generic data types */
+/********************************/
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+
+/*  subrange_type_name ':' subrange_spec_init */
+void *visit(subrange_type_declaration_c *symbol) {
+  TRACE("subrange_type_declaration_c");  
+  type_symtable.insert(symbol->subrange_type_name, symbol->subrange_spec_init);
+  return NULL;
+}
+
+
+/*  enumerated_type_name ':' enumerated_spec_init */
+void *visit(enumerated_type_declaration_c *symbol) {
+  TRACE("enumerated_type_declaration_c");
+  type_symtable.insert(symbol->enumerated_type_name, symbol->enumerated_spec_init);
+  return NULL;
+}
+
+
+/*  identifier ':' array_spec_init */
+void *visit(array_type_declaration_c *symbol) {
+  TRACE("array_type_declaration_c");
+  type_symtable.insert(symbol->identifier, symbol->array_spec_init);
+  return NULL;
+}
+
+
+/*  simple_type_name ':' simple_spec_init */
+void *visit(simple_type_declaration_c *symbol) {
+  TRACE("simple_type_declaration_c");
+  type_symtable.insert(symbol->simple_type_name, symbol->simple_spec_init);
+  return NULL;
+}
+
+
+/*  structure_type_name ':' structure_specification */
+void *visit(structure_type_declaration_c *symbol) {
+  TRACE("structure_type_declaration_c");
+  type_symtable.insert(symbol->structure_type_name, symbol->structure_specification);
+  return NULL;
+}
+
+
+
+/*********************/
+/* B 1.4 - Variables */
+/*********************/
+/********************************************/
+/* B.1.4.1   Directly Represented Variables */
+/********************************************/
+/*************************************/
+/* B.1.4.2   Multi-element Variables */
+/*************************************/
+/******************************************/
+/* B 1.4.3 - Declaration & Initialisation */
+/******************************************/
+/**************************************/
+/* B.1.5 - Program organization units */
+/**************************************/
+/***********************/
+/* B 1.5.1 - Functions */
+/***********************/
+public:
+/*   FUNCTION derived_function_name ':' elementary_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
+/* | FUNCTION derived_function_name ':' derived_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
+void *visit(function_declaration_c *symbol) {
+  TRACE("function_declaration_c");
+  function_symtable.insert(symbol->derived_function_name, symbol);
+
+  /* symbol->derived_function_name->accept(*this);  */ /* Function name */
+  /* symbol->type_name->accept(*this);              */ /* return data type */
+  /* symbol->var_declarations_list->accept(*this);  */ /* Function parameters and variables */
+  /* symbol->function_body->accept(*this);          */ /* Function body */
+  return NULL;
+}
+
+
+/*****************************/
+/* B 1.5.2 - Function Blocks */
+/*****************************/
+public:
+/*  FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
+//SYM_REF4(function_block_declaration_c, fblock_name, var_declarations, fblock_body, unused)
+void *visit(function_block_declaration_c *symbol) {
+  TRACE("function_block_declaration_c");
+  function_block_type_symtable.insert(symbol->fblock_name, symbol);
+/*
+  symbol->fblock_name->accept(*this);
+  symbol->var_declarations->accept(*this);
+  symbol->fblock_body->accept(*this);
+*/
+  return NULL;
+}
+
+
+/**********************/
+/* B 1.5.3 - Programs */
+/**********************/
+public:
+/*  PROGRAM program_type_name program_var_declarations_list function_block_body END_PROGRAM */
+//SYM_REF4(program_declaration_c, program_type_name, var_declarations, function_block_body, unused)
+void *visit(program_declaration_c *symbol) {
+  TRACE("program_declaration_c");
+  program_type_symtable.insert(symbol->program_type_name, symbol);
+/*
+  symbol->program_type_name->accept(*this);
+  symbol->var_declarations->accept(*this);
+  symbol->function_block_body->accept(*this);
+*/
+  return NULL;
+}
+
+}; /* populate_symtables_c */
+
+
+
+
+
+void search_utils_init(symbol_c *tree_root) {
+  populate_symtables_c populate_symbols;
+
+  tree_root->accept(populate_symbols);
+}