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/*
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* (c) 2003 Mario de Sousa
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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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* Conversion of type declaration constructs.
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*
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* This is part of the 4th stage that generates
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* a c++ source program equivalent to the IL and ST
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* 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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class generate_c_typedecl_c: public generate_c_base_c {
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public:
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generate_c_typedecl_c(stage4out_c *s4o_ptr): generate_c_base_c(s4o_ptr) {}
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~generate_c_typedecl_c(void) {}
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/***************************/
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/* B 0 - Programming Model */
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/***************************/
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/* leave for derived classes... */
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/*************************/
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/* B.1 - Common elements */
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/*************************/
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/*******************************************/
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/* B 1.1 - Letters, digits and identifiers */
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/*******************************************/
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/* done in base class(es) */
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/*********************/
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/* B 1.2 - Constants */
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/*********************/
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/* originally empty... */
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/******************************/
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/* B 1.2.1 - Numeric Literals */
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/******************************/
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/* done in base class(es) */
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/*******************************/
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/* B.1.2.2 Character Strings */
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/*******************************/
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/* done in base class(es) */
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/***************************/
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/* B 1.2.3 - Time Literals */
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/***************************/
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/************************/
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/* B 1.2.3.1 - Duration */
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/************************/
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/* done in base class(es) */
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/************************************/
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/* B 1.2.3.2 - Time of day and Date */
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/************************************/
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/* done in base class(es) */
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/**********************/
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/* B.1.3 - Data types */
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/**********************/
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/***********************************/
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/* B 1.3.1 - Elementary Data Types */
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/***********************************/
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/* done in base class(es) */
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/********************************/
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/* B.1.3.2 - Generic data types */
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/********************************/
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/* originally empty... */
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/********************************/
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/* B 1.3.3 - Derived data types */
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/********************************/
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void *visit(subrange_spec_init_c *symbol) {
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TRACE("subrange_spec_init_c");
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// TODO...
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ERROR;
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return NULL;
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}
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void *visit(enumerated_spec_init_c *symbol) {
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TRACE("enumerated_spec_init_c");
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// TODO...
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ERROR;
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return NULL;
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}
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/* TYPE type_declaration_list END_TYPE */
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void *visit(data_type_declaration_c *symbol) {
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TRACE("data_type_declaration_c");
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symbol->type_declaration_list->accept(*this);
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s4o.print("\n\n");
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return NULL;
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}
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/* helper symbol for data_type_declaration */
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void *visit(type_declaration_list_c *symbol) {
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TRACE("type_declaration_list_c");
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return print_list(symbol);
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}
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/* simple_type_name ':' simple_spec_init */
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void *visit(simple_type_declaration_c *symbol) {
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TRACE("simple_type_declaration_c");
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/* add this type declaration to the type symbol table... */
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type_symtable.insert(symbol->simple_type_name, symbol->simple_spec_init);
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s4o.print("typedef ");
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symbol->simple_spec_init->accept(*this);
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s4o.print(" ");
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symbol->simple_type_name->accept(*this);
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s4o.print(";\n");
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return NULL;
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}
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/* simple_specification [ASSIGN constant] */
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//SYM_REF2(simple_spec_init_c, simple_specification, constant)
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// <constant> may be NULL
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void *visit(simple_spec_init_c *symbol) {
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TRACE("simple_spec_init_c");
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symbol->simple_specification->accept(*this);
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return NULL;
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}
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#if 0
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/* subrange_type_name ':' subrange_spec_init */
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SYM_REF2(subrange_type_declaration_c, subrange_type_name, subrange_spec_init)
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/* subrange_specification ASSIGN signed_integer */
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SYM_REF2(subrange_spec_init_c, subrange_specification, signed_integer)
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/* integer_type_name '(' subrange')' */
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SYM_REF2(subrange_specification_c, integer_type_name, subrange)
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/* signed_integer DOTDOT signed_integer */
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SYM_REF2(subrange_c, lower_limit, upper_limit)
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/* enumerated_type_name ':' enumerated_spec_init */
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SYM_REF2(enumerated_type_declaration_c, enumerated_type_name, enumerated_spec_init)
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/* enumerated_specification ASSIGN enumerated_value */
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SYM_REF2(enumerated_spec_init_c, enumerated_specification, enumerated_value)
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/* helper symbol for enumerated_specification->enumerated_spec_init */
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/* enumerated_value_list ',' enumerated_value */
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SYM_LIST(enumerated_value_list_c)
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/* enumerated_type_name '#' identifier */
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SYM_REF2(enumerated_value_c, type, value)
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/* identifier ':' array_spec_init */
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SYM_REF2(array_type_declaration_c, identifier, array_spec_init)
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/* array_specification [ASSIGN array_initialization} */
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/* array_initialization may be NULL ! */
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SYM_REF2(array_spec_init_c, array_specification, array_initialization)
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/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */
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SYM_REF2(array_specification_c, array_subrange_list, non_generic_type_name)
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/* helper symbol for array_specification */
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/* array_subrange_list ',' subrange */
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SYM_LIST(array_subrange_list_c)
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/* array_initialization: '[' array_initial_elements_list ']' */
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/* helper symbol for array_initialization */
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/* array_initial_elements_list ',' array_initial_elements */
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SYM_LIST(array_initial_elements_list_c)
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/* integer '(' [array_initial_element] ')' */
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/* array_initial_element may be NULL ! */
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SYM_REF2(array_initial_elements_c, integer, array_initial_element)
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#endif
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/* structure_type_name ':' structure_specification */
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//SYM_REF2(structure_type_declaration_c, structure_type_name, structure_specification)
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void *visit(structure_type_declaration_c *symbol) {
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TRACE("structure_type_declaration_c");
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/* add this type declaration to the type symbol table... */
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type_symtable.insert(symbol->structure_type_name, symbol->structure_specification);
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s4o.print("typedef ");
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symbol->structure_specification->accept(*this);
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s4o.print(" ");
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symbol->structure_type_name->accept(*this);
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s4o.print(";\n");
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return NULL;
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}
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/* structure_type_name ASSIGN structure_initialization */
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/* structure_initialization may be NULL ! */
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//SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)
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void *visit(initialized_structure_c *symbol) {
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TRACE("initialized_structure_c");
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symbol->structure_type_name->accept(*this);
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return NULL;
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}
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/* helper symbol for structure_declaration */
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/* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */
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/* structure_element_declaration_list structure_element_declaration ';' */
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//SYM_LIST(structure_element_declaration_list_c)
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void *visit(structure_element_declaration_list_c *symbol) {
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TRACE("structure_element_declaration_list_c");
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s4o.print("struct {\n");
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s4o.indent_right();
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s4o.print(s4o.indent_spaces);
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print_list(symbol);
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s4o.indent_left();
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s4o.print(s4o.indent_spaces);
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s4o.print("}");
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return NULL;
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}
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/* structure_element_name ':' spec_init */
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//SYM_REF2(structure_element_declaration_c, structure_element_name, spec_init)
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void *visit(structure_element_declaration_c *symbol) {
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TRACE("structure_element_declaration_c");
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symbol->spec_init->accept(*this);
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s4o.print(" ");
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symbol->structure_element_name->accept(*this);
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s4o.print(";\n");
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s4o.print(s4o.indent_spaces);
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return NULL;
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}
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/* helper symbol for structure_initialization */
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/* structure_initialization: '(' structure_element_initialization_list ')' */
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/* structure_element_initialization_list ',' structure_element_initialization */
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//SYM_LIST(structure_element_initialization_list_c)
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void *visit(structure_element_initialization_list_c *symbol) {
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TRACE("structure_element_initialization_list_c");
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// TODO ???
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ERROR;
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return NULL;
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}
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/* structure_element_name ASSIGN value */
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//SYM_REF2(structure_element_initialization_c, structure_element_name, value)
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void *visit(structure_element_initialization_c *symbol) {
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TRACE("structure_element_initialization_c");
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// TODO ???
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ERROR;
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return NULL;
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}
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#if 0
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/* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */
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/*
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* NOTE:
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* (Summary: Contrary to what is expected, the
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* string_type_declaration_c is not used to store
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* simple string type declarations that do not include
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* size limits.
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* For e.g.:
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* str1_type: STRING := "hello!"
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* will be stored in a simple_type_declaration_c
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* instead of a string_type_declaration_c.
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* The following:
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* str2_type: STRING [64] := "hello!"
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* will be stored in a sring_type_declaration_c
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*
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* Read on for why this is done...
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* End Summary)
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*
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* According to the spec, the valid construct
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* TYPE new_str_type : STRING := "hello!"; END_TYPE
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* has two possible routes to type_declaration...
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*
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* Route 1:
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* type_declaration: single_element_type_declaration
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* single_element_type_declaration: simple_type_declaration
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* simple_type_declaration: identifier ':' simple_spec_init
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* simple_spec_init: simple_specification ASSIGN constant
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* (shift: identifier <- 'new_str_type')
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* simple_specification: elementary_type_name
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* elementary_type_name: STRING
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* (shift: elementary_type_name <- STRING)
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* (reduce: simple_specification <- elementary_type_name)
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* (shift: constant <- "hello!")
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* (reduce: simple_spec_init: simple_specification ASSIGN constant)
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* (reduce: ...)
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*
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*
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* Route 2:
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* type_declaration: string_type_declaration
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* string_type_declaration: identifier ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init
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* (shift: identifier <- 'new_str_type')
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* elementary_string_type_name: STRING
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* (shift: elementary_string_type_name <- STRING)
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* (shift: string_type_declaration_size <- empty )
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* string_type_declaration_init: ASSIGN character_string
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* (shift: character_string <- "hello!")
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* (reduce: string_type_declaration_init <- ASSIGN character_string)
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* (reduce: string_type_declaration <- identifier ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init )
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* (reduce: type_declaration <- string_type_declaration)
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*
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*
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* At first glance it seems that removing route 1 would make
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* the most sense. Unfortunately the construct 'simple_spec_init'
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* shows up multiple times in other rules, so changing this construct
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* would also mean changing all the rules in which it appears.
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* I (Mario) therefore chose to remove route 2 instead. This means
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* that the above declaration gets stored in a
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* simple_type_declaration_c, and not in a string_type_declaration_c
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* as would be expected!
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*/
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353 |
/* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */
|
|
|
354 |
SYM_REF4(string_type_declaration_c, string_type_name,
|
|
|
355 |
elementary_string_type_name,
|
|
|
356 |
string_type_declaration_size,
|
|
|
357 |
string_type_declaration_init) /* may be == NULL! */
|
|
|
358 |
#endif
|
|
|
359 |
|
|
|
360 |
/*********************/
|
|
|
361 |
/* B 1.4 - Variables */
|
|
|
362 |
/*********************/
|
|
|
363 |
/* done in base class(es) */
|
|
|
364 |
|
|
|
365 |
/********************************************/
|
|
|
366 |
/* B.1.4.1 Directly Represented Variables */
|
|
|
367 |
/********************************************/
|
|
|
368 |
// direct_variable: direct_variable_token {$$ = new direct_variable_c($1);};
|
|
|
369 |
void *visit(direct_variable_c *symbol) {
|
|
|
370 |
TRACE("direct_variable_c");
|
|
|
371 |
/* Do not use print_token() as it will change everything into uppercase */
|
|
|
372 |
if (strlen(symbol->value) == 0) ERROR;
|
|
|
373 |
return s4o.printlocation(symbol->value + 1);
|
|
|
374 |
}
|
|
|
375 |
|
|
|
376 |
|
|
|
377 |
/*************************************/
|
|
|
378 |
/* B.1.4.2 Multi-element Variables */
|
|
|
379 |
/*************************************/
|
|
|
380 |
/* done in base class(es) */
|
|
|
381 |
|
|
|
382 |
/******************************************/
|
|
|
383 |
/* B 1.4.3 - Declaration & Initialisation */
|
|
|
384 |
/******************************************/
|
|
|
385 |
/* leave for derived classes... */
|
|
|
386 |
|
|
|
387 |
/**************************************/
|
|
|
388 |
/* B.1.5 - Program organization units */
|
|
|
389 |
/**************************************/
|
|
|
390 |
/***********************/
|
|
|
391 |
/* B 1.5.1 - Functions */
|
|
|
392 |
/***********************/
|
|
|
393 |
/* leave for derived classes... */
|
|
|
394 |
|
|
|
395 |
/*****************************/
|
|
|
396 |
/* B 1.5.2 - Function Blocks */
|
|
|
397 |
/*****************************/
|
|
|
398 |
/* leave for derived classes... */
|
|
|
399 |
|
|
|
400 |
/**********************/
|
|
|
401 |
/* B 1.5.3 - Programs */
|
|
|
402 |
/**********************/
|
|
|
403 |
/* leave for derived classes... */
|
|
|
404 |
|
|
|
405 |
/*********************************************/
|
|
|
406 |
/* B.1.6 Sequential function chart elements */
|
|
|
407 |
/*********************************************/
|
|
|
408 |
|
|
|
409 |
/********************************/
|
|
|
410 |
/* B 1.7 Configuration elements */
|
|
|
411 |
/********************************/
|
|
|
412 |
/* leave for derived classes... */
|
|
|
413 |
|
|
|
414 |
/****************************************/
|
|
|
415 |
/* B.2 - Language IL (Instruction List) */
|
|
|
416 |
/****************************************/
|
|
|
417 |
/***********************************/
|
|
|
418 |
/* B 2.1 Instructions and Operands */
|
|
|
419 |
/***********************************/
|
|
|
420 |
/* leave for derived classes... */
|
|
|
421 |
|
|
|
422 |
/*******************/
|
|
|
423 |
/* B 2.2 Operators */
|
|
|
424 |
/*******************/
|
|
|
425 |
/* leave for derived classes... */
|
|
|
426 |
|
|
|
427 |
|
|
|
428 |
/***************************************/
|
|
|
429 |
/* B.3 - Language ST (Structured Text) */
|
|
|
430 |
/***************************************/
|
|
|
431 |
/***********************/
|
|
|
432 |
/* B 3.1 - Expressions */
|
|
|
433 |
/***********************/
|
|
|
434 |
/* leave for derived classes... */
|
|
|
435 |
|
|
|
436 |
/********************/
|
|
|
437 |
/* B 3.2 Statements */
|
|
|
438 |
/********************/
|
|
|
439 |
/* leave for derived classes... */
|
|
|
440 |
|
|
|
441 |
/*********************************/
|
|
|
442 |
/* B 3.2.1 Assignment Statements */
|
|
|
443 |
/*********************************/
|
|
|
444 |
/* leave for derived classes... */
|
|
|
445 |
|
|
|
446 |
/*****************************************/
|
|
|
447 |
/* B 3.2.2 Subprogram Control Statements */
|
|
|
448 |
/*****************************************/
|
|
|
449 |
/* leave for derived classes... */
|
|
|
450 |
|
|
|
451 |
/********************************/
|
|
|
452 |
/* B 3.2.3 Selection Statements */
|
|
|
453 |
/********************************/
|
|
|
454 |
/* leave for derived classes... */
|
|
|
455 |
|
|
|
456 |
/********************************/
|
|
|
457 |
/* B 3.2.4 Iteration Statements */
|
|
|
458 |
/********************************/
|
|
|
459 |
/* leave for derived classes... */
|
|
|
460 |
|
|
|
461 |
|
|
|
462 |
|
|
|
463 |
|
|
|
464 |
}; /* generate_c_typedecl_c */
|
|
|
465 |
|
|
|
466 |
|
|
|
467 |
|