--- a/stage4/generate_c/search_expression_type.cc Sat May 30 16:42:41 2009 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,386 +0,0 @@
-/*
- * (c) 2003 Mario de Sousa
- *
- * Offered to the public under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * This code is made available on the understanding that it will not be
- * used in safety-critical situations without a full and competent review.
- */
-
-/*
- * An IEC 61131-3 IL and ST compiler.
- *
- * Based on the
- * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
- *
- */
-
-
-/* Determine the data type of an ST expression.
- * A reference to the relevant type definition is returned.
- *
- * For example:
- * 2 + 3 -> returns reference to a int_type_name_c object.
- * 22.2 - 5 -> returns reference to a real_type_name_c object.
- * etc...
- */
-
-#include "function_type_decl.h"
-#include "get_function_type_decl.c"
-
-#if 0
-typedef enum {function_add,
- function_sub,
- function_and,
- function_or,
- function_sqrt,
- function_none} function_type_t;
-
-
-function_type_t get_function_type(identifier_c *function_name) {
- if (!strcasecmp(function_name->value, "ADD"))
- return function_add;
- else if (!strcasecmp(function_name->value, "SUB"))
- return function_sub;
- else if (!strcasecmp(function_name->value, "AND"))
- return function_and;
- else if (!strcasecmp(function_name->value, "OR"))
- return function_or;
- else if (!strcasecmp(function_name->value, "SQRT"))
- return function_sqrt;
- else return function_none;
-}
-#endif
-
-
-symbol_c *generate_param_name(const char *name) {
- symbol_c *param_name = new identifier_c(name);
- return param_name;
-}
-
-
-symbol_c *generate_param_name(const char *format, int number) {
- char name[10];
- sprintf(name, format, number);
- symbol_c *param_name = new identifier_c(name);
- return param_name;
-}
-
-
-class search_expression_type_c: public search_constant_type_c {
- private:
- search_varfb_instance_type_c *search_varfb_instance_type;
- search_base_type_c search_base_type;
-
- public:
- search_expression_type_c(symbol_c *search_scope) {
- search_varfb_instance_type = new search_varfb_instance_type_c(search_scope);
- }
-
- virtual ~search_expression_type_c(void) {
- delete search_varfb_instance_type;
- }
-
- /* A helper function... */
- bool is_bool_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- return (typeid(*type_symbol) == typeid(bool_type_name_c));
- }
-
- /* A helper function... */
- bool is_time_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(tod_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(dt_type_name_c)) {return true;}
- return false;
- }
-
- /* A helper function... */
- bool is_string_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(string_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(wstring_type_name_c)) {return true;}
- return false;
- }
-
- /* A helper function... */
- bool is_integer_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(sint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(int_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(dint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(lint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(uint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(constant_int_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(direct_variable_type_name_c)) {return true;}
- return false;
- }
-
- bool is_real_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(real_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(constant_real_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(direct_variable_type_name_c)) {return true;}
- return false;
- }
-
- bool is_num_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- return is_real_type(type_symbol) || is_integer_type(type_symbol);
- }
-
- bool is_nbinary_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(byte_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(word_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(dword_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(lword_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(constant_int_type_name_c)) {return true;}
- if (typeid(*type_symbol) == typeid(direct_variable_type_name_c)) {return true;}
- return false;
- }
-
- bool is_binary_type(symbol_c *type_symbol) {
- if (type_symbol == NULL) {return true;}
- if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;}
- return is_nbinary_type(type_symbol);
- }
-
- bool is_same_type(symbol_c *first_type, symbol_c *second_type) {
- if (first_type == NULL || second_type == NULL) {return true;}
- if (typeid(*first_type) == typeid(*second_type)) {return true;}
- if (is_integer_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return true;}
- if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_integer_type(second_type))) {return true;}
- if (is_binary_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c))) {return true;}
- if ((typeid(*first_type) == typeid(constant_int_type_name_c) && is_binary_type(second_type))) {return true;}
- if (is_real_type(first_type) && (typeid(*second_type) == typeid(constant_real_type_name_c))) {return true;}
- if ((typeid(*first_type) == typeid(constant_real_type_name_c) && is_real_type(second_type))) {return true;}
- if (typeid(*first_type) == typeid(direct_variable_type_name_c)) {return true;}
- if (typeid(*second_type) == typeid(direct_variable_type_name_c)) {return true;}
- return false;
- }
-
- symbol_c* common_type(symbol_c *first_type, symbol_c *second_type) {
- if (first_type == NULL && second_type == NULL) {return NULL;}
- if (first_type == NULL) {return second_type;}
- if (second_type == NULL) {return first_type;}
- if (typeid(*first_type) == typeid(*second_type)) {return first_type;}
- if (is_integer_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c))) {return first_type;}
- if ((typeid(*first_type) == typeid(constant_int_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c)) && is_integer_type(second_type)) {return second_type;}
- if (is_binary_type(first_type) && (typeid(*second_type) == typeid(constant_int_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c))) {return first_type;}
- if ((typeid(*first_type) == typeid(constant_int_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c)) && is_binary_type(second_type)) {return second_type;}
- if (is_real_type(first_type) && (typeid(*second_type) == typeid(constant_real_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c))) {return first_type;}
- if ((typeid(*first_type) == typeid(constant_real_type_name_c) || typeid(*second_type) == typeid(direct_variable_type_name_c)) && is_real_type(second_type)) {return second_type;}
- return NULL;
- }
-
-#include "search_type_code.c"
-
- /*static bool_type_name_c bool_type_name;*/
-
- /* A helper function... */
- void *compute_boolean_expression(symbol_c *left_type, symbol_c *right_type) {
- if (!is_same_type(left_type, right_type))
- ERROR;
- if (!is_bool_type(left_type) && !is_binary_type(left_type))
- ERROR;
- if (typeid(*left_type) == typeid(constant_int_type_name_c)) {return (void *)right_type;}
- else {return (void *)left_type;}
- }
-
- /* A helper function... */
- void *compute_numeric_expression(symbol_c *left_type, symbol_c *right_type) {
- if (!is_same_type(left_type, right_type))
- ERROR;
- if (!is_integer_type(left_type) && !is_real_type(left_type))
- ERROR;
- if ((typeid(*left_type) == typeid(constant_int_type_name_c)) || (typeid(*left_type) == typeid(constant_real_type_name_c))) {return (void *)right_type;}
- else {return (void *)left_type;}
- return NULL;
- }
-
- /* a helper function... */
- symbol_c *base_type(symbol_c *symbol) {
- return (symbol_c *)symbol->accept(search_base_type);
- }
-
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-
- void *visit(symbolic_variable_c *symbol) {
- symbol_c *res;
-
- /* Nope, now we assume it is a variable, and determine its type... */
- res = search_varfb_instance_type->get_type(symbol);
- if (NULL != res) return res;
-
- return NULL;
- }
-
-/********************************************/
-/* B 1.4.1 - Directly Represented Variables */
-/********************************************/
- void *visit(direct_variable_c *symbol) {
- switch (symbol->value[2]) {
- case 'X': // bit
- return (void *)&bool_type_name;
- default:
- return (void *)&direct_variable_type_name;
- }
- }
-
-/*************************************/
-/* B 1.4.2 - Multi-element variables */
-/*************************************/
-
- void *visit(array_variable_c *symbol) {
- symbol_c *res;
-
- /* Nope, now we assume it is a variable, and determine its type... */
- res = search_varfb_instance_type->get_type(symbol);
- if (NULL != res) return res;
-
- return NULL;
- }
-
- void *visit(structured_variable_c *symbol) {
- symbol_c *res;
-
- /* Nope, now we assume it is a variable, and determine its type... */
- res = search_varfb_instance_type->get_type(symbol);
- if (NULL != res) return res;
-
- return NULL;
- }
-
-/***************************************/
-/* B.3 - Language ST (Structured Text) */
-/***************************************/
-/***********************/
-/* B 3.1 - Expressions */
-/***********************/
- void *visit(or_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- return compute_boolean_expression(left_type, right_type);
- }
-
- void *visit(xor_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- return compute_boolean_expression(left_type, right_type);
- }
-
- void *visit(and_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- return compute_boolean_expression(left_type, right_type);
- }
-
- void *visit(equ_expression_c *symbol) {return (void *)&bool_type_name;}
- void *visit(notequ_expression_c *symbol) {return (void *)&bool_type_name;}
- void *visit(lt_expression_c *symbol) {return (void *)&bool_type_name;}
- void *visit(gt_expression_c *symbol) {return (void *)&bool_type_name;}
- void *visit(le_expression_c *symbol) {return (void *)&bool_type_name;}
- void *visit(ge_expression_c *symbol) {return (void *)&bool_type_name;}
-
- void *visit(add_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;}
- if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;}
- if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;}
- return compute_numeric_expression(left_type, right_type);
- }
-
- void *visit(sub_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;}
- if (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) {return (void *)&time_type_name;}
- if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;}
- if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) {return (void *)&time_type_name;}
- if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;}
- if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)) {return (void *)&time_type_name;}
- return compute_numeric_expression(left_type, right_type);
- }
-
- void *visit(mul_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)) {
- return (void *)&time_type_name;
- }
- return compute_numeric_expression(left_type, right_type);
- }
-
- void *visit(div_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)){
- return (void *)&time_type_name;
- }
- return compute_numeric_expression(left_type, right_type);
- }
-
- void *visit(mod_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- return compute_numeric_expression(left_type, right_type);
- }
-
- void *visit(power_expression_c *symbol) {
- symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this));
- symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this));
- if (is_real_type(left_type) && is_num_type(right_type)) {
- return (void *)left_type;
- }
- ERROR;
- return NULL;
- }
-
- void *visit(neg_expression_c *symbol) {
- symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this));
- if (is_num_type(exp_type) || typeid(*exp_type) == typeid(time_type_name_c)){
- return (void *)exp_type;
- }
- ERROR;
- return NULL;
- }
-
- void *visit(not_expression_c *symbol) {
- symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this));
- return compute_boolean_expression(exp_type, exp_type);
- }
-
- void *visit(function_invocation_c *symbol) {
- function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
-
- if (f_decl == function_symtable.end_value()) {
- void *res = compute_standard_function_default(symbol);
- if (res == NULL)
- ERROR;
- return res;
- }
-
- return base_type(f_decl->type_name);
- }
-
-};
-
-/*bool_type_name_c search_expression_type_c::bool_type_name;*/
-