author | laurent |
Mon, 16 May 2011 11:57:41 +0200 | |
changeset 292 | a1d9c206409e |
parent 279 | c0453b7f99df |
child 321 | a96399ab57c2 |
permissions | -rwxr-xr-x |
181 | 1 |
/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (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, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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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 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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/* Determine the data type of an ST expression. |
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* A reference to the relevant type definition is returned. |
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* |
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* For example: |
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* 2 + 3 -> returns reference to a int_type_name_c object. |
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* 22.2 - 5 -> returns reference to a real_type_name_c object. |
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* etc... |
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*/ |
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#include "absyntax_utils.hh" |
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#include <typeinfo> |
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search_expression_type_c::search_expression_type_c(symbol_c *search_scope) { |
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search_varfb_instance_type = new search_varfb_instance_type_c(search_scope); |
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} |
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search_expression_type_c::~search_expression_type_c(void) { |
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delete search_varfb_instance_type; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_bool_type(symbol_c *type_symbol) { |
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bool_type_name_c tt; |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(safebool_type_name_c)) {return true;} |
61 |
if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(boolean_true_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(boolean_false_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_time_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(tod_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dt_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safetime_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safedate_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safetod_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safedt_type_name_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_string_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(string_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(wstring_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safestring_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safewstring_type_name_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_literal_integer_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(integer_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(neg_integer_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(binary_integer_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(octal_integer_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(hex_integer_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_integer_type(symbol_c *type_symbol) { |
104 |
if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(sint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(int_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(uint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safesint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safedint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safelint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeusint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeuint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeudint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeulint_type_name_c)) {return true;} |
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return is_literal_integer_type(type_symbol); |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_literal_real_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(real_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(neg_real_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool search_expression_type_c::is_real_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(real_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safereal_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safelreal_type_name_c)) {return true;} |
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return is_literal_real_type(type_symbol); |
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} |
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bool search_expression_type_c::is_num_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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return is_real_type(type_symbol) || is_integer_type(type_symbol); |
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} |
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bool search_expression_type_c::is_nbinary_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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if (typeid(*type_symbol) == typeid(byte_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(word_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dword_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lword_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safebyte_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safeword_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safedword_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(safelword_type_name_c)) {return true;} |
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return is_literal_integer_type(type_symbol); |
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} |
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bool search_expression_type_c::is_binary_type(symbol_c *type_symbol) { |
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if (type_symbol == NULL) {return true;} |
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// if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;} |
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// if (typeid(*type_symbol) == typeid(safebool_type_name_c)) {return true;} |
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return (is_nbinary_type(type_symbol) || is_bool_type(type_symbol)); |
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} |
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bool search_expression_type_c::is_same_type(symbol_c *first_type, symbol_c *second_type) { |
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if (first_type == NULL || second_type == NULL) {return true;} |
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if (typeid(*first_type) == typeid(*second_type)) {return true;} |
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if (is_bool_type(first_type) && is_bool_type(second_type)) {return true;} |
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if (is_integer_type(first_type) && is_literal_integer_type(second_type)) {return true;} |
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if (is_literal_integer_type(first_type) && is_integer_type(second_type)) {return true;} |
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if (is_binary_type(first_type) && is_literal_integer_type(second_type)) {return true;} |
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if (is_literal_integer_type(first_type) && is_binary_type(second_type)) {return true;} |
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if (is_real_type(first_type) && is_literal_real_type(second_type)) {return true;} |
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if (is_literal_real_type(first_type) && is_real_type(second_type)) {return true;} |
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181 | 177 |
return false; |
178 |
} |
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symbol_c* search_expression_type_c::common_type(symbol_c *first_type, symbol_c *second_type) { |
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if (first_type == NULL && second_type == NULL) {return NULL;} |
|
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if (first_type == NULL) {return second_type;} |
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if (second_type == NULL) {return first_type;} |
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if (typeid(*first_type) == typeid(*second_type)) {return first_type;} |
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257 | 185 |
if (is_integer_type(first_type) && is_literal_integer_type(second_type)) {return first_type;} |
186 |
if (is_literal_integer_type(first_type) && is_integer_type(second_type)) {return second_type;} |
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if (is_binary_type(first_type) && is_literal_integer_type(second_type)) {return first_type;} |
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if (is_literal_integer_type(first_type) && is_binary_type(second_type)) {return second_type;} |
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if (is_real_type(first_type) && is_literal_real_type(second_type)) {return first_type;} |
|
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if (is_literal_real_type(first_type) && is_real_type(second_type)) {return second_type;} |
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return NULL; |
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192 |
} |
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195 |
integer_c search_expression_type_c::integer("1"); // what default value should we use here ??? |
181 | 196 |
#include "search_type_code.c" |
197 |
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198 |
/*static bool_type_name_c bool_type_name;*/ |
|
199 |
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200 |
/* A helper function... */ |
|
201 |
void *search_expression_type_c::compute_boolean_expression(symbol_c *left_type, symbol_c *right_type) { |
|
202 |
if (!is_same_type(left_type, right_type)) |
|
203 |
ERROR; |
|
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if (!is_bool_type(left_type) && !is_binary_type(left_type)) |
|
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ERROR; |
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if (is_literal_integer_type(left_type)) {return (void *)right_type;} |
181 | 207 |
else {return (void *)left_type;} |
208 |
} |
|
209 |
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210 |
/* A helper function... */ |
|
211 |
void *search_expression_type_c::compute_numeric_expression(symbol_c *left_type, symbol_c *right_type) { |
|
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if (!is_same_type(left_type, right_type)) |
|
213 |
ERROR; |
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214 |
if (!is_integer_type(left_type) && !is_real_type(left_type)) |
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ERROR; |
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if (is_literal_integer_type(left_type) || is_literal_real_type(left_type)) {return (void *)right_type;} |
181 | 217 |
else {return (void *)left_type;} |
218 |
return NULL; |
|
219 |
} |
|
220 |
||
221 |
/* a helper function... */ |
|
222 |
symbol_c *search_expression_type_c::base_type(symbol_c *symbol) { |
|
223 |
return (symbol_c *)symbol->accept(search_base_type); |
|
224 |
} |
|
225 |
||
226 |
/*********************/ |
|
227 |
/* B 1.4 - Variables */ |
|
228 |
/*********************/ |
|
229 |
||
230 |
void *search_expression_type_c::visit(symbolic_variable_c *symbol) { |
|
231 |
symbol_c *res; |
|
232 |
||
233 |
/* Nope, now we assume it is a variable, and determine its type... */ |
|
234 |
res = search_varfb_instance_type->get_type(symbol); |
|
235 |
if (NULL != res) return res; |
|
236 |
||
237 |
return NULL; |
|
238 |
} |
|
239 |
||
240 |
/********************************************/ |
|
241 |
/* B 1.4.1 - Directly Represented Variables */ |
|
242 |
/********************************************/ |
|
243 |
void *search_expression_type_c::visit(direct_variable_c *symbol) { |
|
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symbol_c *res; |
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/* Nope, now we assume it is a variable, and determine its type... */ |
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res = search_varfb_instance_type->get_type(symbol); |
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if (NULL != res) return res; |
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|
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return NULL; |
181 | 251 |
} |
252 |
||
253 |
/*************************************/ |
|
254 |
/* B 1.4.2 - Multi-element variables */ |
|
255 |
/*************************************/ |
|
256 |
||
257 |
void *search_expression_type_c::visit(array_variable_c *symbol) { |
|
258 |
symbol_c *res; |
|
259 |
||
260 |
/* Nope, now we assume it is a variable, and determine its type... */ |
|
261 |
res = search_varfb_instance_type->get_type(symbol); |
|
262 |
if (NULL != res) return res; |
|
263 |
||
264 |
return NULL; |
|
265 |
} |
|
266 |
||
267 |
void *search_expression_type_c::visit(structured_variable_c *symbol) { |
|
268 |
symbol_c *res; |
|
269 |
||
270 |
/* Nope, now we assume it is a variable, and determine its type... */ |
|
271 |
res = search_varfb_instance_type->get_type(symbol); |
|
272 |
if (NULL != res) return res; |
|
273 |
||
274 |
return NULL; |
|
275 |
} |
|
276 |
||
277 |
/***************************************/ |
|
278 |
/* B.3 - Language ST (Structured Text) */ |
|
279 |
/***************************************/ |
|
280 |
/***********************/ |
|
281 |
/* B 3.1 - Expressions */ |
|
282 |
/***********************/ |
|
283 |
void *search_expression_type_c::visit(or_expression_c *symbol) { |
|
284 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
285 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
286 |
return compute_boolean_expression(left_type, right_type); |
|
287 |
} |
|
288 |
||
289 |
void *search_expression_type_c::visit(xor_expression_c *symbol) { |
|
290 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
291 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
292 |
return compute_boolean_expression(left_type, right_type); |
|
293 |
} |
|
294 |
||
295 |
void *search_expression_type_c::visit(and_expression_c *symbol) { |
|
296 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
297 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
298 |
return compute_boolean_expression(left_type, right_type); |
|
299 |
} |
|
300 |
||
301 |
void *search_expression_type_c::visit(equ_expression_c *symbol) {return (void *)&bool_type_name;} |
|
302 |
void *search_expression_type_c::visit(notequ_expression_c *symbol) {return (void *)&bool_type_name;} |
|
303 |
void *search_expression_type_c::visit(lt_expression_c *symbol) {return (void *)&bool_type_name;} |
|
304 |
void *search_expression_type_c::visit(gt_expression_c *symbol) {return (void *)&bool_type_name;} |
|
305 |
void *search_expression_type_c::visit(le_expression_c *symbol) {return (void *)&bool_type_name;} |
|
306 |
void *search_expression_type_c::visit(ge_expression_c *symbol) {return (void *)&bool_type_name;} |
|
307 |
||
308 |
void *search_expression_type_c::visit(add_expression_c *symbol) { |
|
309 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
310 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
311 |
if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;} |
|
312 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;} |
|
313 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;} |
|
314 |
return compute_numeric_expression(left_type, right_type); |
|
315 |
} |
|
316 |
||
317 |
void *search_expression_type_c::visit(sub_expression_c *symbol) { |
|
318 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
319 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
320 |
if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;} |
|
321 |
if (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) {return (void *)&time_type_name;} |
|
322 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;} |
|
323 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) {return (void *)&time_type_name;} |
|
324 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;} |
|
325 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)) {return (void *)&time_type_name;} |
|
326 |
return compute_numeric_expression(left_type, right_type); |
|
327 |
} |
|
328 |
||
329 |
void *search_expression_type_c::visit(mul_expression_c *symbol) { |
|
330 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
331 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
332 |
if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)) { |
|
333 |
return (void *)&time_type_name; |
|
334 |
} |
|
335 |
return compute_numeric_expression(left_type, right_type); |
|
336 |
} |
|
337 |
||
338 |
void *search_expression_type_c::visit(div_expression_c *symbol) { |
|
339 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
340 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
341 |
if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)){ |
|
342 |
return (void *)&time_type_name; |
|
343 |
} |
|
344 |
return compute_numeric_expression(left_type, right_type); |
|
345 |
} |
|
346 |
||
347 |
void *search_expression_type_c::visit(mod_expression_c *symbol) { |
|
348 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
349 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
350 |
return compute_numeric_expression(left_type, right_type); |
|
351 |
} |
|
352 |
||
353 |
void *search_expression_type_c::visit(power_expression_c *symbol) { |
|
354 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
355 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
356 |
if (is_real_type(left_type) && is_num_type(right_type)) { |
|
357 |
return (void *)left_type; |
|
358 |
} |
|
359 |
ERROR; |
|
360 |
return NULL; |
|
361 |
} |
|
362 |
||
363 |
void *search_expression_type_c::visit(neg_expression_c *symbol) { |
|
364 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
365 |
if (is_num_type(exp_type) || typeid(*exp_type) == typeid(time_type_name_c)){ |
|
366 |
return (void *)exp_type; |
|
367 |
} |
|
368 |
ERROR; |
|
369 |
return NULL; |
|
370 |
} |
|
371 |
||
372 |
void *search_expression_type_c::visit(not_expression_c *symbol) { |
|
373 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
374 |
return compute_boolean_expression(exp_type, exp_type); |
|
375 |
} |
|
376 |
||
377 |
void *search_expression_type_c::visit(function_invocation_c *symbol) { |
|
378 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name); |
|
379 |
if (f_decl == function_symtable.end_value()) { |
|
380 |
void *res = compute_standard_function_default(symbol); |
|
381 |
if (res == NULL) |
|
382 |
ERROR; |
|
383 |
return res; |
|
384 |
} |
|
385 |
return base_type(f_decl->type_name); |
|
386 |
} |
|
387 |
||
388 |
/*bool_type_name_c search_expression_type_c::bool_type_name;*/ |
|
389 |