author | lbessard |
Tue, 19 May 2009 16:31:35 +0200 | |
changeset 176 | bef3cc16c064 |
parent 173 | 160cb7c26bae |
permissions | -rw-r--r-- |
70 | 1 |
/* |
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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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if (type_symbol == NULL) {return true;} |
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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 (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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return false; |
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} |
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/* A helper function... */ |
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bool 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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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 (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(constant_int_type_name_c)) {return true;} |
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152 | 127 |
if (typeid(*type_symbol) == typeid(direct_variable_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 (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(constant_real_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(direct_variable_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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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 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(constant_int_type_name_c)) {return true;} |
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152 | 152 |
if (typeid(*type_symbol) == typeid(direct_variable_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 (type_symbol == NULL) {return true;} |
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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 (first_type == NULL || second_type == NULL) {return true;} |
70 | 164 |
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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if (typeid(*first_type) == typeid(direct_variable_type_name_c)) {return true;} |
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if (typeid(*second_type) == typeid(direct_variable_type_name_c)) {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 (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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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;} |
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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;} |
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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;} |
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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;} |
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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;} |
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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;} |
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return NULL; |
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} |
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#include "search_type_code.c" |
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/*static bool_type_name_c bool_type_name;*/ |
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/* A helper function... */ |
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void *compute_boolean_expression(symbol_c *left_type, symbol_c *right_type) { |
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if (!is_same_type(left_type, right_type)) |
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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 (typeid(*left_type) == typeid(constant_int_type_name_c)) {return (void *)right_type;} |
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else {return (void *)left_type;} |
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} |
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/* A helper function... */ |
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void *compute_numeric_expression(symbol_c *left_type, symbol_c *right_type) { |
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if (!is_same_type(left_type, right_type)) |
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ERROR; |
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if (!is_integer_type(left_type) && !is_real_type(left_type)) |
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ERROR; |
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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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else {return (void *)left_type;} |
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return NULL; |
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} |
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/* a helper function... */ |
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symbol_c *base_type(symbol_c *symbol) { |
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return (symbol_c *)symbol->accept(search_base_type); |
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} |
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/*********************/ |
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/* B 1.4 - Variables */ |
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/*********************/ |
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void *visit(symbolic_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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return NULL; |
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} |
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/********************************************/ |
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/* B 1.4.1 - Directly Represented Variables */ |
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/********************************************/ |
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void *visit(direct_variable_c *symbol) { |
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switch (symbol->value[2]) { |
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case 'X': // bit |
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return (void *)&bool_type_name; |
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default: |
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return (void *)&direct_variable_type_name; |
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} |
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} |
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/*************************************/ |
247 |
/* B 1.4.2 - Multi-element variables */ |
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/*************************************/ |
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249 |
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void *visit(array_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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256 |
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257 |
return NULL; |
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} |
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void *visit(structured_variable_c *symbol) { |
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symbol_c *res; |
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263 |
/* 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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return NULL; |
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} |
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/***************************************/ |
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/* B.3 - Language ST (Structured Text) */ |
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/***************************************/ |
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/***********************/ |
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/* B 3.1 - Expressions */ |
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/***********************/ |
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void *visit(or_expression_c *symbol) { |
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symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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return compute_boolean_expression(left_type, right_type); |
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} |
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282 |
void *visit(xor_expression_c *symbol) { |
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symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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return compute_boolean_expression(left_type, right_type); |
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} |
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288 |
void *visit(and_expression_c *symbol) { |
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symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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return compute_boolean_expression(left_type, right_type); |
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} |
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294 |
void *visit(equ_expression_c *symbol) {return (void *)&bool_type_name;} |
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void *visit(notequ_expression_c *symbol) {return (void *)&bool_type_name;} |
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void *visit(lt_expression_c *symbol) {return (void *)&bool_type_name;} |
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void *visit(gt_expression_c *symbol) {return (void *)&bool_type_name;} |
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298 |
void *visit(le_expression_c *symbol) {return (void *)&bool_type_name;} |
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void *visit(ge_expression_c *symbol) {return (void *)&bool_type_name;} |
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301 |
void *visit(add_expression_c *symbol) { |
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symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;} |
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if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;} |
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if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;} |
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return compute_numeric_expression(left_type, right_type); |
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} |
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310 |
void *visit(sub_expression_c *symbol) { |
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symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&time_type_name;} |
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if (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) {return (void *)&time_type_name;} |
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if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&tod_type_name;} |
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if (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) {return (void *)&time_type_name;} |
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if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) {return (void *)&dt_type_name;} |
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if (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)) {return (void *)&time_type_name;} |
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319 |
return compute_numeric_expression(left_type, right_type); |
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320 |
} |
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321 |
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322 |
void *visit(mul_expression_c *symbol) { |
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323 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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324 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)) { |
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326 |
return (void *)&time_type_name; |
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327 |
} |
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328 |
return compute_numeric_expression(left_type, right_type); |
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329 |
} |
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330 |
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331 |
void *visit(div_expression_c *symbol) { |
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332 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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333 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
334 |
if (typeid(*left_type) == typeid(time_type_name_c) && is_num_type(right_type)){ |
|
335 |
return (void *)&time_type_name; |
|
336 |
} |
|
337 |
return compute_numeric_expression(left_type, right_type); |
|
338 |
} |
|
339 |
||
340 |
void *visit(mod_expression_c *symbol) { |
|
341 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
342 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
343 |
return compute_numeric_expression(left_type, right_type); |
|
344 |
} |
|
345 |
||
346 |
void *visit(power_expression_c *symbol) { |
|
347 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
348 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
349 |
if (is_real_type(left_type) && is_num_type(right_type)) { |
|
350 |
return (void *)left_type; |
|
351 |
} |
|
352 |
ERROR; |
|
353 |
return NULL; |
|
354 |
} |
|
355 |
||
356 |
void *visit(neg_expression_c *symbol) { |
|
357 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
358 |
if (is_num_type(exp_type) || typeid(*exp_type) == typeid(time_type_name_c)){ |
|
123 | 359 |
return (void *)exp_type; |
360 |
} |
|
70 | 361 |
ERROR; |
362 |
return NULL; |
|
363 |
} |
|
364 |
||
365 |
void *visit(not_expression_c *symbol) { |
|
366 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
367 |
return compute_boolean_expression(exp_type, exp_type); |
|
368 |
} |
|
369 |
||
370 |
void *visit(function_invocation_c *symbol) { |
|
371 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name); |
|
372 |
||
373 |
if (f_decl == function_symtable.end_value()) { |
|
149 | 374 |
void *res = compute_standard_function_default(symbol); |
70 | 375 |
if (res == NULL) |
376 |
ERROR; |
|
377 |
return res; |
|
378 |
} |
|
379 |
||
380 |
return base_type(f_decl->type_name); |
|
381 |
} |
|
382 |
||
383 |
}; |
|
384 |
||
385 |
/*bool_type_name_c search_expression_type_c::bool_type_name;*/ |
|
386 |