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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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/* 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 "function_type_decl.h"
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#include "get_function_type_decl.c"
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#if 0
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typedef enum {function_add,
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function_sub,
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function_and,
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function_or,
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function_sqrt,
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function_none} function_type_t;
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function_type_t get_function_type(identifier_c *function_name) {
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if (!strcasecmp(function_name->value, "ADD"))
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return function_add;
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else if (!strcasecmp(function_name->value, "SUB"))
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return function_sub;
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else if (!strcasecmp(function_name->value, "AND"))
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return function_and;
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else if (!strcasecmp(function_name->value, "OR"))
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return function_or;
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else if (!strcasecmp(function_name->value, "SQRT"))
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return function_sqrt;
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else return function_none;
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}
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#endif
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symbol_c *generate_param_name(const char *name) {
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symbol_c *param_name = new identifier_c(name);
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return param_name;
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}
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symbol_c *generate_param_name(const char *format, int number) {
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char name[10];
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sprintf(name, format, number);
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symbol_c *param_name = new identifier_c(name);
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return param_name;
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}
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class search_expression_type_c: public search_constant_type_c {
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private:
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search_varfb_instance_type_c *search_varfb_instance_type;
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search_base_type_c search_base_type;
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public:
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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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virtual ~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 is_bool_type(symbol_c *type_symbol) {
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return (typeid(*type_symbol) == typeid(bool_type_name_c));
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}
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/* A helper function... */
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bool is_time_type(symbol_c *type_symbol) {
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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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return false;
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}
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/* A helper function... */
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bool is_integer_type(symbol_c *type_symbol) {
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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(constant_int_type_name_c)) {return true;}
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return false;
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}
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bool is_real_type(symbol_c *type_symbol) {
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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(constant_real_type_name_c)) {return true;}
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return false;
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}
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bool is_num_type(symbol_c *type_symbol) {
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return is_real_type(type_symbol) || is_integer_type(type_symbol);
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}
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bool is_nbinary_type(symbol_c *type_symbol) {
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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(constant_int_type_name_c)) {return true;}
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return false;
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}
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bool is_binary_type(symbol_c *type_symbol) {
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if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;}
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return is_nbinary_type(type_symbol);
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}
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bool is_same_type(symbol_c *first_type, symbol_c *second_type) {
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if (typeid(*first_type) == typeid(*second_type)) {return true;}
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if (is_integer_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return true;}
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if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_integer_type(second_type))) {return true;}
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if (is_binary_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return true;}
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if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_binary_type(second_type))) {return true;}
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if (is_real_type(first_type) && (typeid(*second_type) == typeid(constant_real_type_name_c))) {return true;}
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if ((typeid(*first_type) == typeid(constant_real_type_name_c) && is_real_type(second_type))) {return true;}
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return false;
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}
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symbol_c* common_type(symbol_c *first_type, symbol_c *second_type) {
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if (typeid(*first_type) == typeid(*second_type)) {return first_type;}
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if (is_integer_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return first_type;}
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if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_integer_type(second_type))) {return second_type;}
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if (is_binary_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return first_type;}
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if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_binary_type(second_type))) {return second_type;}
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if (is_real_type(first_type) && (typeid(*second_type) == typeid(constant_real_type_name_c))) {return first_type;}
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if ((typeid(*first_type) == typeid(constant_real_type_name_c) && is_real_type(second_type))) {return second_type;}
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return NULL;
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}
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#include "search_type_code.c"
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#if 0
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void *compute_standard_function_st(function_invocation_c *symbol) {
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symbol_c *current_type = NULL;
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symbol_c *return_type = NULL;
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function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
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function_call_param_iterator_c function_call_param_iterator(symbol);
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search_expression_type_c* search_expression_type = this;
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for(int current_param = 0; current_param < ((list_c *)symbol->parameter_assignment_list)->n; current_param++) {
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symbol_c *param_name = NULL;
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switch (current_function_type) {
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case function_add:
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case function_and:
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case function_or:
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param_name = generate_param_name("IN%d", current_param + 1);
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break;
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case function_sub:
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if (current_param < 2)
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param_name = generate_param_name("IN%d", current_param + 1);
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else ERROR;
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break;
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default: ERROR;
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}
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/* Get the value from a foo(<param_name> = <param_value>) style call */
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symbol_c *param_value = function_call_param_iterator.search(param_name);
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delete param_name;
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/* Get the value from a foo(<param_value>) style call */
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if (param_value == NULL)
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param_value = function_call_param_iterator.next();
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if (param_value == NULL) ERROR;
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symbol_c *param_type = (symbol_c *)param_value->accept(*this);
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switch (current_function_type) {
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case function_add:
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if (current_param == 0)
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current_type = param_type;
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else if (current_param == 1) {
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if ((is_integer_type(current_type) && is_same_type(current_type, param_type)) ||
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(is_real_type(current_type) && is_same_type(current_type, param_type))) {
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current_type = common_type(current_type, param_type);
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return_type = current_type;
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}
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else if (is_time_type(current_type)) {
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if ((typeid(*current_type) == typeid(time_type_name_c)) && (typeid(*param_type) == typeid(time_type_name_c))) {return_type = (symbol_c *)&time_type_name;}
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else if (typeid(*current_type) == typeid(tod_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&tod_type_name;}
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else if (typeid(*current_type) == typeid(dt_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&dt_type_name;}
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else ERROR;
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}
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else ERROR;
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}
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else if (!is_time_type(current_type) && is_same_type(current_type, param_type)) {
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current_type = common_type(current_type, param_type);
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return_type = current_type;
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}
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else ERROR;
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break;
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case function_sub:
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if (current_param == 0)
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current_type = param_type;
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else if (current_param == 1) {
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if ((is_integer_type(current_type) && is_same_type(current_type, param_type)) ||
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(is_real_type(current_type) && is_same_type(current_type, param_type)))
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return_type = common_type(current_type, param_type);
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else if (is_time_type(current_type)) {
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if (typeid(*current_type) == typeid(time_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&time_type_name;}
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else if (typeid(*current_type) == typeid(date_type_name_c) && typeid(*param_type) == typeid(date_type_name_c)) {return_type = (symbol_c *)&time_type_name;}
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else if (typeid(*current_type) == typeid(tod_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&tod_type_name;}
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else if (typeid(*current_type) == typeid(tod_type_name_c) && typeid(*param_type) == typeid(tod_type_name_c)) {return_type = (symbol_c *)&time_type_name;}
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else if (typeid(*current_type) == typeid(dt_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&dt_type_name;}
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else if (typeid(*current_type) == typeid(dt_type_name_c) && typeid(*param_type) == typeid(dt_type_name_c)) {return_type = (symbol_c *)&time_type_name;}
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else ERROR;
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}
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else ERROR;
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}
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else ERROR;
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break;
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case function_and:
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case function_or:
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if (current_param == 0)
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if (is_binary_type(param_type))
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current_type = param_type;
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else ERROR;
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else if (is_same_type(current_type, param_type))
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return_type = common_type(current_type, param_type);
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else ERROR;
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break;
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default: ERROR;
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}
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}
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return (void *)return_type;
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}
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264 |
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void *compute_standard_function_il(il_function_call_c *symbol, symbol_c *param_type) {
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/*symbol_c *current_type = NULL;*/
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symbol_c *return_type = NULL;
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function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
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if (current_function_type == function_none) ERROR;
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function_call_param_iterator_c function_call_param_iterator(symbol);
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int nb_param = 1;
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if (symbol->il_operand_list != NULL)
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nb_param += ((list_c *)symbol->il_operand_list)->n;
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for(int current_param = 0; current_param < nb_param; current_param++) {
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if (current_param != 0) {
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symbol_c *param_name = NULL;
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281 |
switch (current_function_type) {
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default: ERROR;
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}
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284 |
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285 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
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286 |
symbol_c *param_value = function_call_param_iterator.search(param_name);
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287 |
delete param_name;
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288 |
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289 |
/* Get the value from a foo(<param_value>) style call */
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290 |
if (param_value == NULL)
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param_value = function_call_param_iterator.next();
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292 |
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if (param_value == NULL) ERROR;
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param_type = (symbol_c *)param_value->accept(*this);
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296 |
}
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297 |
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298 |
switch (current_function_type) {
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299 |
case function_sqrt:
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300 |
if (current_param == 0 && is_real_type(param_type))
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301 |
return_type = param_type;
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else ERROR;
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303 |
break;
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304 |
default: ERROR;
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305 |
}
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306 |
}
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307 |
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|
308 |
return (void *)return_type;
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|
309 |
}
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310 |
#endif
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311 |
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|
312 |
/*static bool_type_name_c bool_type_name;*/
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313 |
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|
314 |
/* A helper function... */
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|
315 |
void *compute_boolean_expression(symbol_c *left_type, symbol_c *right_type) {
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|
316 |
if (!is_same_type(left_type, right_type))
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|
317 |
ERROR;
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|
318 |
if (!is_bool_type(left_type) && !is_binary_type(left_type))
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|
319 |
ERROR;
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|
320 |
if (typeid(*left_type) == typeid(constant_int_type_name_c)) {return (void *)right_type;}
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|
321 |
else {return (void *)left_type;}
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|
322 |
}
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323 |
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|
324 |
/* A helper function... */
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|
325 |
void *compute_numeric_expression(symbol_c *left_type, symbol_c *right_type) {
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|
326 |
if (!is_same_type(left_type, right_type))
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|
327 |
ERROR;
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|
328 |
if (!is_integer_type(left_type) && !is_real_type(left_type))
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|
329 |
ERROR;
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|
330 |
if ((typeid(*left_type) == typeid(constant_int_type_name_c)) || (typeid(*left_type) == typeid(constant_real_type_name_c))) {return (void *)right_type;}
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|
331 |
else {return (void *)left_type;}
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|
332 |
return NULL;
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|
333 |
}
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|
334 |
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|
335 |
/* a helper function... */
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|
336 |
symbol_c *base_type(symbol_c *symbol) {
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|
337 |
return (symbol_c *)symbol->accept(search_base_type);
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|
338 |
}
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|
339 |
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|
340 |
/*********************/
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|
341 |
/* B 1.4 - Variables */
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|
342 |
/*********************/
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|
343 |
|
|
|
344 |
void *visit(symbolic_variable_c *symbol) {
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|
345 |
symbol_c *res;
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|
346 |
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|
347 |
/* Nope, now we assume it is a variable, and determine its type... */
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|
348 |
res = search_varfb_instance_type->get_type(symbol);
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|
349 |
if (NULL != res) return res;
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|
350 |
|
|
|
351 |
return NULL;
|
|
|
352 |
}
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|
|
353 |
|
|
|
354 |
/*************************************/
|
|
|
355 |
/* B 1.4.2 - Multi-element variables */
|
|
|
356 |
/*************************************/
|
|
|
357 |
|
|
|
358 |
void *visit(array_variable_c *symbol) {
|
|
|
359 |
symbol_c *res;
|
|
|
360 |
|
|
|
361 |
/* Nope, now we assume it is a variable, and determine its type... */
|
|
|
362 |
res = search_varfb_instance_type->get_type(symbol);
|
|
|
363 |
if (NULL != res) return res;
|
|
|
364 |
|
|
|
365 |
return NULL;
|
|
|
366 |
}
|
|
|
367 |
|
|
|
368 |
void *visit(structured_variable_c *symbol) {
|
|
|
369 |
symbol_c *res;
|
|
|
370 |
|
|
|
371 |
/* Nope, now we assume it is a variable, and determine its type... */
|
|
|
372 |
res = search_varfb_instance_type->get_type(symbol);
|
|
|
373 |
if (NULL != res) return res;
|
|
|
374 |
|
|
|
375 |
return NULL;
|
|
|
376 |
}
|
|
|
377 |
|
|
|
378 |
/***************************************/
|
|
|
379 |
/* B.3 - Language ST (Structured Text) */
|
|
|
380 |
/***************************************/
|
|
|
381 |
/***********************/
|
|
|
382 |
/* B 3.1 - Expressions */
|
|
|
383 |
/***********************/
|
|
|
384 |
void *visit(or_expression_c *symbol) {
|
|
|
385 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
386 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
387 |
return compute_boolean_expression(left_type, right_type);
|
|
|
388 |
}
|
|
|
389 |
|
|
|
390 |
void *visit(xor_expression_c *symbol) {
|
|
|
391 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
392 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
393 |
return compute_boolean_expression(left_type, right_type);
|
|
|
394 |
}
|
|
|
395 |
|
|
|
396 |
void *visit(and_expression_c *symbol) {
|
|
|
397 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
398 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
399 |
return compute_boolean_expression(left_type, right_type);
|
|
|
400 |
}
|
|
|
401 |
|
|
|
402 |
void *visit(equ_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
403 |
void *visit(notequ_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
404 |
void *visit(lt_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
405 |
void *visit(gt_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
406 |
void *visit(le_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
407 |
void *visit(ge_expression_c *symbol) {return (void *)&bool_type_name;}
|
|
|
408 |
|
|
|
409 |
void *visit(add_expression_c *symbol) {
|
|
|
410 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
411 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
412 |
if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;}
|
|
|
413 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;}
|
|
|
414 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;}
|
|
|
415 |
return compute_numeric_expression(left_type, right_type);
|
|
|
416 |
}
|
|
|
417 |
|
|
|
418 |
void *visit(sub_expression_c *symbol) {
|
|
|
419 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
420 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
421 |
if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;}
|
|
|
422 |
if (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) {return (void *)&time_type_name;}
|
|
|
423 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;}
|
|
|
424 |
if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) {return (void *)&time_type_name;}
|
|
|
425 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;}
|
|
|
426 |
if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)) {return (void *)&time_type_name;}
|
|
|
427 |
return compute_numeric_expression(left_type, right_type);
|
|
|
428 |
}
|
|
|
429 |
|
|
|
430 |
void *visit(mul_expression_c *symbol) {
|
|
|
431 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
432 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
433 |
if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)) {
|
|
|
434 |
return (void *)&time_type_name;
|
|
|
435 |
}
|
|
|
436 |
return compute_numeric_expression(left_type, right_type);
|
|
|
437 |
}
|
|
|
438 |
|
|
|
439 |
void *visit(div_expression_c *symbol) {
|
|
|
440 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
441 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
442 |
if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)){
|
|
|
443 |
return (void *)&time_type_name;
|
|
|
444 |
}
|
|
|
445 |
return compute_numeric_expression(left_type, right_type);
|
|
|
446 |
}
|
|
|
447 |
|
|
|
448 |
void *visit(mod_expression_c *symbol) {
|
|
|
449 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
450 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
451 |
return compute_numeric_expression(left_type, right_type);
|
|
|
452 |
}
|
|
|
453 |
|
|
|
454 |
void *visit(power_expression_c *symbol) {
|
|
|
455 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
|
|
|
456 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
|
|
|
457 |
if (is_real_type(left_type) && is_num_type(right_type)) {
|
|
|
458 |
return (void *)left_type;
|
|
|
459 |
}
|
|
|
460 |
ERROR;
|
|
|
461 |
return NULL;
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
void *visit(neg_expression_c *symbol) {
|
|
|
465 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this));
|
|
|
466 |
if (is_num_type(exp_type) || typeid(*exp_type) == typeid(time_type_name_c)){
|
|
|
467 |
return (void *)exp_type;
|
|
|
468 |
}
|
|
|
469 |
ERROR;
|
|
|
470 |
return NULL;
|
|
|
471 |
}
|
|
|
472 |
|
|
|
473 |
void *visit(not_expression_c *symbol) {
|
|
|
474 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this));
|
|
|
475 |
return compute_boolean_expression(exp_type, exp_type);
|
|
|
476 |
}
|
|
|
477 |
|
|
|
478 |
void *visit(function_invocation_c *symbol) {
|
|
|
479 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
|
|
|
480 |
|
|
|
481 |
if (f_decl == function_symtable.end_value()) {
|
|
|
482 |
void *res = compute_standard_function_st(symbol);
|
|
|
483 |
if (res == NULL)
|
|
|
484 |
ERROR;
|
|
|
485 |
return res;
|
|
|
486 |
}
|
|
|
487 |
|
|
|
488 |
return base_type(f_decl->type_name);
|
|
|
489 |
}
|
|
|
490 |
|
|
|
491 |
};
|
|
|
492 |
|
|
|
493 |
/*bool_type_name_c search_expression_type_c::bool_type_name;*/
|
|
|
494 |
|