--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage4/generate_c/search_expression_type.cc Wed Oct 24 17:39:51 2007 +0200
@@ -0,0 +1,494 @@
+/*
+ * (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) {
+ return (typeid(*type_symbol) == typeid(bool_type_name_c));
+ }
+
+ /* A helper function... */
+ bool is_time_type(symbol_c *type_symbol) {
+ 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_integer_type(symbol_c *type_symbol) {
+ 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;}
+ return false;
+ }
+
+ bool is_real_type(symbol_c *type_symbol) {
+ 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;}
+ return false;
+ }
+
+ bool is_num_type(symbol_c *type_symbol) {
+ return is_real_type(type_symbol) || is_integer_type(type_symbol);
+ }
+
+ bool is_nbinary_type(symbol_c *type_symbol) {
+ 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;}
+ return false;
+ }
+
+ bool is_binary_type(symbol_c *type_symbol) {
+ 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 (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;}
+ return false;
+ }
+
+ symbol_c* common_type(symbol_c *first_type, symbol_c *second_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))) {return first_type;}
+ if ((typeid(*first_type) == typeid(constant_int_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))) {return first_type;}
+ if ((typeid(*first_type) == typeid(constant_int_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))) {return first_type;}
+ if ((typeid(*first_type) == typeid(constant_real_type_name_c) && is_real_type(second_type))) {return second_type;}
+ return NULL;
+ }
+
+#include "search_type_code.c"
+
+#if 0
+ void *compute_standard_function_st(function_invocation_c *symbol) {
+ symbol_c *current_type = NULL;
+ symbol_c *return_type = NULL;
+
+ function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
+ function_call_param_iterator_c function_call_param_iterator(symbol);
+ search_expression_type_c* search_expression_type = this;
+
+ for(int current_param = 0; current_param < ((list_c *)symbol->parameter_assignment_list)->n; current_param++) {
+ symbol_c *param_name = NULL;
+ switch (current_function_type) {
+ case function_add:
+ case function_and:
+ case function_or:
+ param_name = generate_param_name("IN%d", current_param + 1);
+ break;
+ case function_sub:
+ if (current_param < 2)
+ param_name = generate_param_name("IN%d", current_param + 1);
+ else ERROR;
+ break;
+ default: ERROR;
+ }
+
+ /* Get the value from a foo(<param_name> = <param_value>) style call */
+ symbol_c *param_value = function_call_param_iterator.search(param_name);
+ delete param_name;
+
+ /* Get the value from a foo(<param_value>) style call */
+ if (param_value == NULL)
+ param_value = function_call_param_iterator.next();
+
+ if (param_value == NULL) ERROR;
+
+ symbol_c *param_type = (symbol_c *)param_value->accept(*this);
+
+ switch (current_function_type) {
+ case function_add:
+ if (current_param == 0)
+ current_type = param_type;
+ else if (current_param == 1) {
+ if ((is_integer_type(current_type) && is_same_type(current_type, param_type)) ||
+ (is_real_type(current_type) && is_same_type(current_type, param_type))) {
+ current_type = common_type(current_type, param_type);
+ return_type = current_type;
+ }
+ else if (is_time_type(current_type)) {
+ if ((typeid(*current_type) == typeid(time_type_name_c)) && (typeid(*param_type) == typeid(time_type_name_c))) {return_type = (symbol_c *)&time_type_name;}
+ 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;}
+ 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;}
+ else ERROR;
+ }
+ else ERROR;
+ }
+ else if (!is_time_type(current_type) && is_same_type(current_type, param_type)) {
+ current_type = common_type(current_type, param_type);
+ return_type = current_type;
+ }
+ else ERROR;
+ break;
+ case function_sub:
+ if (current_param == 0)
+ current_type = param_type;
+ else if (current_param == 1) {
+ if ((is_integer_type(current_type) && is_same_type(current_type, param_type)) ||
+ (is_real_type(current_type) && is_same_type(current_type, param_type)))
+ return_type = common_type(current_type, param_type);
+ else if (is_time_type(current_type)) {
+ if (typeid(*current_type) == typeid(time_type_name_c) && typeid(*param_type) == typeid(time_type_name_c)) {return_type = (symbol_c *)&time_type_name;}
+ 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;}
+ 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;}
+ 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;}
+ 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;}
+ 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;}
+ else ERROR;
+ }
+ else ERROR;
+ }
+ else ERROR;
+ break;
+ case function_and:
+ case function_or:
+ if (current_param == 0)
+ if (is_binary_type(param_type))
+ current_type = param_type;
+ else ERROR;
+ else if (is_same_type(current_type, param_type))
+ return_type = common_type(current_type, param_type);
+ else ERROR;
+ break;
+ default: ERROR;
+ }
+ }
+ return (void *)return_type;
+ }
+
+ void *compute_standard_function_il(il_function_call_c *symbol, symbol_c *param_type) {
+ /*symbol_c *current_type = NULL;*/
+ symbol_c *return_type = NULL;
+ function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
+ if (current_function_type == function_none) ERROR;
+
+ function_call_param_iterator_c function_call_param_iterator(symbol);
+
+ int nb_param = 1;
+ if (symbol->il_operand_list != NULL)
+ nb_param += ((list_c *)symbol->il_operand_list)->n;
+
+ for(int current_param = 0; current_param < nb_param; current_param++) {
+
+ if (current_param != 0) {
+ symbol_c *param_name = NULL;
+ switch (current_function_type) {
+ default: ERROR;
+ }
+
+ /* Get the value from a foo(<param_name> = <param_value>) style call */
+ symbol_c *param_value = function_call_param_iterator.search(param_name);
+ delete param_name;
+
+ /* Get the value from a foo(<param_value>) style call */
+ if (param_value == NULL)
+ param_value = function_call_param_iterator.next();
+
+ if (param_value == NULL) ERROR;
+
+ param_type = (symbol_c *)param_value->accept(*this);
+ }
+
+ switch (current_function_type) {
+ case function_sqrt:
+ if (current_param == 0 && is_real_type(param_type))
+ return_type = param_type;
+ else ERROR;
+ break;
+ default: ERROR;
+ }
+ }
+
+ return (void *)return_type;
+ }
+#endif
+
+ /*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 1.4.2 - 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_st(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;*/
+