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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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/*
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* Conversion of il statements (i.e. IL code).
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*
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* This is part of the 4th stage that generates
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* a c++ source program equivalent to the IL and ST
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* code.
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*/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/* Returns the data type of an il_operand.
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*
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* Note that the il_operand may be a variable, in which case
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* we return the type of the variable instance.
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* The il_operand may also be a constant, in which case
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* we return the data type of that constant.
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*
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* The variable instance may be a member of a structured variable,
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* or an element in an array, or any combination of the two.
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*
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* The class constructor must be given the search scope
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* (function, function block or program within which
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* the possible il_operand variable instance was declared).
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*/
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class search_il_operand_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_constant_type_c search_constant_type;
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public:
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search_il_operand_type_c(symbol_c *search_scope): search_varfb_instance_type(search_scope) {}
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public:
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symbol_c *get_type(symbol_c *il_operand) {
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symbol_c *res;
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/* We first assume that it is a constant... */
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res = search_constant_type.get_type(il_operand);
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if (res != NULL) return 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(il_operand);
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if (NULL != res) return res;
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/* not found */
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return NULL;
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}
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};
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/* A new class to ouput the il default variable to c++ code
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* We use this class, inheriting from symbol_c, so it may be used
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* as any other symbol_c object in the intermediate parse tree,
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* more specifically, so it can be used as any other il operand.
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* This makes the rest of the code much easier...
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*
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* Nevertheless, the basic visitor class visitor_c does not know
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* how to visit this new il_default_variable_c class, so we have
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* to extend that too.
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* In reality extending the basic symbols doesn't quite work out
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* as cleanly as desired (we need to use dynamic_cast in the
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* accept method of the il_default_variable_c), but it is cleaner
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* than the alternative...
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*/
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class il_default_variable_c;
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/* This visitor class is not really required, we could place the
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* visit() method directly in genertae_cc_il_c, but doing it in
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* a seperate class makes the architecture more evident...
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*/
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class il_default_variable_visitor_c {
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public:
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virtual void *visit(il_default_variable_c *symbol) = 0;
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virtual ~il_default_variable_visitor_c(void) {return;}
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};
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/* A class to print out to the resulting C++ code
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* the IL default variable name.
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*
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* It includes a reference to its name,
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* and the data type of the data currently stored
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* in this C++ variable... This is required because the
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* C++ variable is a union, and we must know which member
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* of the union top reference!!
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*
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* Note that we also need to keep track of the data type of
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* the value currently being stored in the default variable.
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* This is required so we can process parenthesis,
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*
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* e.g. :
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* LD var1
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* AND (
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* LD var2
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* OR var3
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* )
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*
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* Note that we only execute the 'AND (' operation when we come across
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* the ')', i.e. once we have evaluated the result of the
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* instructions inside the parenthesis.
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* When we do execute the 'AND (' operation, we need to know the data type
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* of the operand, which in this case is the result of the evaluation of the
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* instruction list inside the parenthesis. We can only know this if we
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* keep track of the data type currently stored in the default variable!
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*
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* We use the current_type inside the generate_c_il::default_variable_name variable
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* to track this!
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*/
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class il_default_variable_c: public symbol_c {
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public:
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symbol_c *var_name; /* in principle, this should point to an indentifier_c */
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symbol_c *current_type;
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public:
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il_default_variable_c(const char *var_name_str, symbol_c *current_type);
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virtual void *accept(visitor_c &visitor);
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};
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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/***********************************************************************/
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class generate_c_il_c: public generate_c_typedecl_c, il_default_variable_visitor_c {
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private:
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/* When compiling il code, it becomes necessary to determine the
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* data type of il operands. To do this, we must first find the
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* il operand's declaration, within the scope of the function block
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* or function currently being processed.
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* The following object does just that...
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* This object instance will then later be called while the
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* remaining il code is being handled.
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*/
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//search_il_operand_type_c *search_il_operand_type;
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search_expression_type_c *search_expression_type;
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/* The initial value that should be given to the IL default variable
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* imediately after a parenthesis is opened.
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* This variable is only used to pass data from the
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* il_expression_c visitor to the simple_instr_list_c visitor.
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*
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* e.g.:
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* LD var1
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* AND ( var2
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* OR var3
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* )
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*
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* In the above code sample, the line 'AND ( var2' constitutes
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* an il_expression_c, where var2 should be loaded into the
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* il default variable before continuing with the expression
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* inside the parenthesis.
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* Unfortunately, only the simple_instr_list_c may do the
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* initial laoding of the var2 bariable following the parenthesis,
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* so the il_expression_c visitor will have to pass 'var2' as a
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* parameter to the simple_instr_list_c visitor.
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* Ergo, the existance of the following parameter...!
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*/
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symbol_c *il_default_variable_init_value;
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/* Operand to the IL operation currently being processed... */
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/* These variables are used to pass data from the
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* il_simple_operation_c and il_expression_c visitors
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* to the il operator visitors (i.e. LD_operator_c,
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* LDN_operator_c, ST_operator_c, STN_operator_c, ...)
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*/
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symbol_c *current_operand;
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symbol_c *current_operand_type;
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/* Label to which the current IL jump operation should jump to... */
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/* This variable is used to pass data from the
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* il_jump_operation_c visitor
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* to the il jump operator visitors (i.e. JMP_operator_c,
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* JMPC_operator_c, JMPCN_operator_c, ...)
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*/
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symbol_c *jump_label;
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/* The result of the comparison IL operations (GT, EQ, LT, ...)
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* is a boolean variable.
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* This class keeps track of the current data type stored in the
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* il default variable. This is usually done by keeping a reference
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* to the data type of the last operand. Nevertheless, in the case of
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* the comparison IL operators, the data type of the result (a boolean)
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* is not the data type of the operand. We therefore need an object
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* of the boolean data type to keep as a reference of the current
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* data type.
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* The following object is it...
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*/
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bool_type_name_c bool_type;
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/* the data type of the IL default variable... */
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#define IL_DEFVAR_T VAR_LEADER "IL_DEFVAR_T"
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/* The name of the IL default variable... */
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#define IL_DEFVAR VAR_LEADER "IL_DEFVAR"
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/* The name of the variable used to pass the result of a
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* parenthesised instruction list to the immediately preceding
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* scope ...
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*/
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#define IL_DEFVAR_BACK VAR_LEADER "IL_DEFVAR_BACK"
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il_default_variable_c default_variable_name;
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il_default_variable_c default_variable_back_name;
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/* Some function calls in the body of functions or function blocks
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* may leave some parameters to their default values, and
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* ignore some output parameters of the function being called.
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* Our conversion of ST functions to C++ does not contemplate that,
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* i.e. each called function must get all it's input and output
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* parameters set correctly.
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* For input parameters we merely need to call the function with
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* the apropriate default value, but for output parameters
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* we must create temporary variables to hold the output value.
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*
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* We declare all the temporary output variables at the begining of
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* the body of each function or function block, and use them as
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* in function calls later on as they become necessary...
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* Note that we cannot create these variables just before a function
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* call, as the function call itself may be integrated within an
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* expression, or another function call!
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*
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* The variables are declared in the exact same order in which they
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* will be used later on during the function calls, which allows us
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* to simply re-create the name that was used for the temporary variable
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* instead of keeping it in some list.
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* The names are recreated by the temp_var_name_factory, after reset()
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* has been called!
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*
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* This function will genertae code similar to...
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*
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* INT __TMP_0 = 23;
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* REAL __TMP_1 = 45.5;
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* ...
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*/
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temp_var_name_c temp_var_name_factory;
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/* When calling a function block, we must first find it's type,
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* by searching through the declarations of the variables currently
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* in scope.
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* This class does just that...
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* A new class is instantiated whenever we begin generating the code
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* for a function block type declaration, or a program declaration.
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* This object instance will then later be called while the
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* function block's or the program's body is being handled.
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*
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* Note that functions cannot contain calls to function blocks,
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* so we do not create an object instance when handling
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* a function declaration.
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*/
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search_fb_instance_decl_c *search_fb_instance_decl;
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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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generate_c_il_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL)
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: generate_c_typedecl_c(s4o_ptr),
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default_variable_name(IL_DEFVAR, NULL),
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default_variable_back_name(IL_DEFVAR_BACK, NULL)
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{
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//search_il_operand_type = new search_il_operand_type_c(scope);
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search_expression_type = new search_expression_type_c(scope);
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search_fb_instance_decl = new search_fb_instance_decl_c(scope);
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search_varfb_instance_type = new search_varfb_instance_type_c(scope);
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current_operand = NULL;
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current_operand_type = NULL;
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il_default_variable_init_value = NULL;
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this->set_variable_prefix(variable_prefix);
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}
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virtual ~generate_c_il_c(void) {
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delete search_fb_instance_decl;
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//delete search_il_operand_type;
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delete search_expression_type;
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delete search_varfb_instance_type;
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}
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void generate(instruction_list_c *il) {
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generate_c_tempvardecl_c generate_c_tempvardecl(&s4o);
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generate_c_tempvardecl.generate(il, &temp_var_name_factory);
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il->accept(*this);
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}
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/* Declare the backup to the default variable, that will store the result
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* of the IL operations executed inside a parenthesis...
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*/
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void declare_backup_variable(void) {
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s4o.print(s4o.indent_spaces);
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s4o.print(IL_DEFVAR_T);
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s4o.print(" ");
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print_backup_variable();
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s4o.print(";\n");
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}
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void print_backup_variable(void) {
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this->default_variable_back_name.accept(*this);
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}
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private:
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/* A helper function... */
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/*
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bool is_bool_type(symbol_c *type_symbol) {
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return (NULL != dynamic_cast<bool_type_name_c *>(type_symbol));
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}
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*/
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/* A helper function... */
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void *XXX_operator(symbol_c *lo, const char *op, symbol_c *ro) {
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if ((NULL == lo) || (NULL == ro)) ERROR;
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if (NULL == op) ERROR;
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lo->accept(*this);
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s4o.print(op);
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ro->accept(*this);
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return NULL;
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}
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/* A helper function... */
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void *XXX_function(const char *func, symbol_c *lo, symbol_c *ro) {
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if ((NULL == lo) || (NULL == ro)) ERROR;
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if (NULL == func) ERROR;
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lo->accept(*this);
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s4o.print(" = ");
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s4o.print(func);
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s4o.print("(");
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lo->accept(*this);
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s4o.print(", ");
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ro->accept(*this);
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s4o.print(")");
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return NULL;
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}
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/* A helper function... */
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void *XXX_CAL_operator(const char *param_name, symbol_c *fb_name) {
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if (NULL == fb_name) ERROR;
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symbolic_variable_c *sv = dynamic_cast<symbolic_variable_c *>(fb_name);
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if (NULL == sv) ERROR;
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identifier_c *id = dynamic_cast<identifier_c *>(sv->var_name);
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if (NULL == id) ERROR;
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identifier_c param(param_name);
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//SYM_REF3(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list)
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il_param_assignment_c il_param_assignment(¶m, &this->default_variable_name, NULL);
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// SYM_LIST(il_param_list_c)
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il_param_list_c il_param_list;
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il_param_list.add_element(&il_param_assignment);
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CAL_operator_c CAL_operator;
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// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list)
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il_fb_call_c il_fb_call(&CAL_operator, id, NULL, &il_param_list);
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il_fb_call.accept(*this);
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return NULL;
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}
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/* A helper function... */
|
|
401 |
void *CMP_operator(symbol_c *o, const char *operation) {
|
|
402 |
if (NULL == o) ERROR;
|
|
403 |
if (NULL == this->default_variable_name.current_type) ERROR;
|
|
404 |
|
|
405 |
symbol_c *backup = this->default_variable_name.current_type;
|
|
406 |
this->default_variable_name.current_type = &(this->bool_type);
|
|
407 |
this->default_variable_name.accept(*this);
|
|
408 |
this->default_variable_name.current_type = backup;
|
|
409 |
|
|
410 |
s4o.print(" = ");
|
|
411 |
s4o.print(operation);
|
|
412 |
this->default_variable_name.current_type->accept(*this);
|
|
413 |
s4o.print("(2, ");
|
|
414 |
this->default_variable_name.accept(*this);
|
|
415 |
s4o.print(", ");
|
|
416 |
o->accept(*this);
|
|
417 |
s4o.print(")");
|
|
418 |
|
|
419 |
/* the data type resulting from this operation... */
|
|
420 |
this->default_variable_name.current_type = &(this->bool_type);
|
|
421 |
return NULL;
|
|
422 |
}
|
|
423 |
|
|
424 |
|
|
425 |
/* A helper function... */
|
|
426 |
void C_modifier(void) {
|
|
427 |
if (search_expression_type->is_bool_type(default_variable_name.current_type)) {
|
|
428 |
s4o.print("if (");
|
|
429 |
this->default_variable_name.accept(*this);
|
|
430 |
s4o.print(") ");
|
|
431 |
}
|
|
432 |
else {ERROR;}
|
|
433 |
}
|
|
434 |
|
|
435 |
/* A helper function... */
|
|
436 |
void CN_modifier(void) {
|
|
437 |
if (search_expression_type->is_bool_type(default_variable_name.current_type)) {
|
|
438 |
s4o.print("if (!");
|
|
439 |
this->default_variable_name.accept(*this);
|
|
440 |
s4o.print(") ");
|
|
441 |
}
|
|
442 |
else {ERROR;}
|
|
443 |
}
|
|
444 |
|
|
445 |
|
|
446 |
public:
|
|
447 |
void *visit(il_default_variable_c *symbol) {
|
|
448 |
//s4o.print("il_default_variable_c VISITOR!!\n");
|
|
449 |
symbol->var_name->accept(*this);
|
|
450 |
if (NULL != symbol->current_type) {
|
|
451 |
s4o.print(".");
|
|
452 |
symbol->current_type->accept(*this);
|
|
453 |
s4o.print("var");
|
|
454 |
}
|
|
455 |
return NULL;
|
|
456 |
}
|
|
457 |
|
|
458 |
|
|
459 |
private:
|
|
460 |
|
|
461 |
/********************************************/
|
|
462 |
/* B.1.4.1 Directly Represented Variables */
|
|
463 |
/********************************************/
|
|
464 |
// direct_variable: direct_variable_token {$$ = new direct_variable_c($1);};
|
|
465 |
void *visit(direct_variable_c *symbol) {
|
|
466 |
TRACE("direct_variable_c");
|
|
467 |
/* Do not use print_token() as it will change everything into uppercase */
|
|
468 |
if (strlen(symbol->value) == 0) ERROR;
|
|
469 |
s4o.print("*(");
|
|
470 |
this->print_variable_prefix();
|
|
471 |
s4o.printlocation(symbol->value + 1);
|
|
472 |
s4o.print(")");
|
|
473 |
return NULL;
|
|
474 |
}
|
|
475 |
|
|
476 |
/****************************************/
|
|
477 |
/* B.2 - Language IL (Instruction List) */
|
|
478 |
/****************************************/
|
|
479 |
|
|
480 |
/***********************************/
|
|
481 |
/* B 2.1 Instructions and Operands */
|
|
482 |
/***********************************/
|
|
483 |
|
|
484 |
/* please see the comment before the RET_operator_c visitor for details... */
|
|
485 |
#define END_LABEL VAR_LEADER "end"
|
|
486 |
|
|
487 |
/*| instruction_list il_instruction */
|
|
488 |
void *visit(instruction_list_c *symbol) {
|
|
489 |
|
|
490 |
/* Declare the backup to the default variable, that will store the result
|
|
491 |
* of the IL operations executed inside a parenthesis...
|
|
492 |
*/
|
|
493 |
declare_backup_variable();
|
|
494 |
|
|
495 |
/* Declare the default variable, that will store the result of the IL operations... */
|
|
496 |
s4o.print(s4o.indent_spaces);
|
|
497 |
s4o.print(IL_DEFVAR_T);
|
|
498 |
s4o.print(" ");
|
|
499 |
this->default_variable_name.accept(*this);
|
|
500 |
s4o.print(";\n\n");
|
|
501 |
|
|
502 |
print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
|
|
503 |
|
|
504 |
/* write the label marking the end of the code block */
|
|
505 |
/* please see the comment before the RET_operator_c visitor for details... */
|
|
506 |
s4o.print("\n");
|
|
507 |
s4o.print(s4o.indent_spaces);
|
|
508 |
s4o.print(END_LABEL);
|
|
509 |
s4o.print(":\n");
|
|
510 |
s4o.indent_right();
|
|
511 |
/* since every label must be followed by at least one statement, and
|
|
512 |
* only the functions will introduce the return statement after this label,
|
|
513 |
* function blocks written in IL would result in invalid C++ code.
|
|
514 |
* To work around this we introduce the equivalent of a 'nop' operation
|
|
515 |
* to humour the compiler...
|
|
516 |
*/
|
|
517 |
s4o.print(s4o.indent_spaces);
|
|
518 |
s4o.print("/* to humour the compiler, we insert a nop */\n");
|
|
519 |
s4o.print(s4o.indent_spaces);
|
|
520 |
this->default_variable_name.accept(*this);
|
|
521 |
s4o.print(" = ");
|
|
522 |
this->default_variable_name.accept(*this);
|
|
523 |
s4o.print(";\n");
|
|
524 |
s4o.indent_left();
|
|
525 |
|
|
526 |
return NULL;
|
|
527 |
}
|
|
528 |
|
|
529 |
|
|
530 |
/* | label ':' [il_incomplete_instruction] eol_list */
|
|
531 |
// SYM_REF2(il_instruction_c, label, il_instruction)
|
|
532 |
void *visit(il_instruction_c *symbol) {
|
|
533 |
if (NULL != symbol->label) {
|
|
534 |
symbol->label->accept(*this);
|
|
535 |
s4o.print(":\n");
|
|
536 |
s4o.print(s4o.indent_spaces);
|
|
537 |
}
|
|
538 |
symbol->il_instruction->accept(*this);
|
|
539 |
return NULL;
|
|
540 |
}
|
|
541 |
|
|
542 |
/* | il_simple_operator [il_operand] */
|
|
543 |
//SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand)
|
|
544 |
void *visit(il_simple_operation_c *symbol) {
|
|
545 |
this->current_operand = symbol->il_operand;
|
|
546 |
if (NULL == this->current_operand) {
|
|
547 |
this->current_operand_type = NULL;
|
|
548 |
} else {
|
|
549 |
this->current_operand_type = search_expression_type->get_type(this->current_operand);
|
|
550 |
if (NULL == this->current_operand_type) ERROR;
|
|
551 |
}
|
|
552 |
|
|
553 |
symbol->il_simple_operator->accept(*this);
|
|
554 |
|
|
555 |
this->current_operand = NULL;
|
|
556 |
this->current_operand_type = NULL;
|
|
557 |
return NULL;
|
|
558 |
}
|
|
559 |
|
|
560 |
|
|
561 |
/* | function_name [il_operand_list] */
|
|
562 |
// SYM_REF2(il_function_call_c, function_name, il_operand_list)
|
|
563 |
void *visit(il_function_call_c *symbol) {
|
|
564 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
|
|
565 |
|
|
566 |
if (f_decl == function_symtable.end_value()) {
|
|
567 |
/* should never occur. The function being called MUST be in the symtable... */
|
|
568 |
function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
|
|
569 |
if (current_function_type == function_none) ERROR;
|
|
570 |
|
|
571 |
symbol_c *param_data_type = default_variable_name.current_type;
|
|
572 |
symbol_c *return_data_type = (symbol_c *)search_expression_type->compute_standard_function_il(symbol, param_data_type);
|
|
573 |
if (NULL == return_data_type) ERROR;
|
|
574 |
|
|
575 |
default_variable_name.current_type = return_data_type;
|
|
576 |
this->default_variable_name.accept(*this);
|
|
577 |
default_variable_name.current_type = param_data_type;
|
|
578 |
s4o.print(" = ");
|
|
579 |
|
|
580 |
function_call_param_iterator_c function_call_param_iterator(symbol);
|
|
581 |
|
|
582 |
int nb_param = 1;
|
|
583 |
if (symbol->il_operand_list != NULL)
|
|
584 |
nb_param += ((list_c *)symbol->il_operand_list)->n;
|
|
585 |
|
|
586 |
#include "il_code_gen.c"
|
|
587 |
|
|
588 |
#if 0
|
|
589 |
for(int current_param = 0; current_param < nb_param; current_param++) {
|
|
590 |
symbol_c *param_value;
|
|
591 |
if (current_param == 0)
|
|
592 |
param_value = &this->default_variable_name;
|
|
593 |
else {
|
|
594 |
symbol_c *param_name = NULL;
|
|
595 |
switch (current_function_type) {
|
|
596 |
default: ERROR;
|
|
597 |
}
|
|
598 |
|
|
599 |
|
|
600 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
|
|
601 |
param_value = function_call_param_iterator.search(param_name);
|
|
602 |
delete param_name;
|
|
603 |
|
|
604 |
/* Get the value from a foo(<param_value>) style call */
|
|
605 |
if (param_value == NULL)
|
|
606 |
param_value = function_call_param_iterator.next();
|
|
607 |
|
|
608 |
if (param_value == NULL) ERROR;
|
|
609 |
}
|
|
610 |
|
|
611 |
switch (current_function_type) {
|
|
612 |
case (function_sqrt):
|
|
613 |
if (current_param == 0) {
|
|
614 |
s4o.print("sqrt(");
|
|
615 |
param_value->accept(*this);
|
|
616 |
s4o.print(")");
|
|
617 |
}
|
|
618 |
else ERROR;
|
|
619 |
break;
|
|
620 |
default: ERROR;
|
|
621 |
}
|
|
622 |
} /* for(...) */
|
|
623 |
#endif
|
|
624 |
|
|
625 |
/* the data type returned by the function, and stored in the il default variable... */
|
|
626 |
default_variable_name.current_type = return_data_type;
|
|
627 |
}
|
|
628 |
else {
|
|
629 |
/* determine the base data type returned by the function being called... */
|
|
630 |
search_base_type_c search_base_type;
|
|
631 |
symbol_c *return_data_type = (symbol_c *)f_decl->type_name->accept(search_base_type);
|
|
632 |
symbol_c *param_data_type = default_variable_name.current_type;
|
|
633 |
if (NULL == return_data_type) ERROR;
|
|
634 |
|
|
635 |
default_variable_name.current_type = return_data_type;
|
|
636 |
this->default_variable_name.accept(*this);
|
|
637 |
default_variable_name.current_type = param_data_type;
|
|
638 |
s4o.print(" = ");
|
|
639 |
|
|
640 |
symbol->function_name->accept(*this);
|
|
641 |
s4o.print("(");
|
|
642 |
|
|
643 |
/* loop through each function parameter, find the value we should pass
|
|
644 |
* to it, and then output the c equivalent...
|
|
645 |
*/
|
|
646 |
|
|
647 |
function_param_iterator_c fp_iterator(f_decl);
|
|
648 |
identifier_c *param_name;
|
|
649 |
function_call_param_iterator_c function_call_param_iterator(symbol);
|
|
650 |
for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
|
|
651 |
if (i != 1)
|
|
652 |
s4o.print(", ");
|
|
653 |
|
|
654 |
symbol_c *param_type = fp_iterator.param_type();
|
|
655 |
if (param_type == NULL) ERROR;
|
|
656 |
|
|
657 |
function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
|
|
658 |
|
|
659 |
|
|
660 |
symbol_c *param_value = NULL;
|
|
661 |
|
|
662 |
/* if it is the first parameter, semantics specifies that we should
|
|
663 |
* get the value off the IL default variable!
|
|
664 |
*/
|
|
665 |
if (1 == i)
|
|
666 |
param_value = &this->default_variable_name;
|
|
667 |
|
|
668 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
|
|
669 |
/* NOTE: the following line of code is not required in this case, but it doesn't
|
|
670 |
* harm to leave it in, as in the case of a non-formal syntax function call,
|
|
671 |
* it will always return NULL.
|
|
672 |
* We leave it in in case we later decide to merge this part of the code together
|
|
673 |
* with the function calling code in generate_c_st_c, which does require
|
|
674 |
* the following line...
|
|
675 |
*/
|
|
676 |
if (param_value == NULL)
|
|
677 |
param_value = function_call_param_iterator.search(param_name);
|
|
678 |
|
|
679 |
/* Get the value from a foo(<param_value>) style call */
|
|
680 |
if (param_value == NULL)
|
|
681 |
param_value = function_call_param_iterator.next();
|
|
682 |
|
|
683 |
switch (param_direction) {
|
|
684 |
case function_param_iterator_c::direction_in:
|
|
685 |
if (param_value == NULL) {
|
|
686 |
/* No value given for parameter, so we must use the default... */
|
|
687 |
/* First check whether default value specified in function declaration...*/
|
|
688 |
param_value = fp_iterator.default_value();
|
|
689 |
}
|
|
690 |
if (param_value == NULL) {
|
|
691 |
/* If not, get the default value of this variable's type */
|
|
692 |
param_value = (symbol_c *)param_type->accept(*type_initial_value_c::instance());
|
|
693 |
}
|
|
694 |
if (param_value == NULL) ERROR;
|
|
695 |
param_value->accept(*this);
|
|
696 |
break;
|
|
697 |
case function_param_iterator_c::direction_out:
|
|
698 |
case function_param_iterator_c::direction_inout:
|
|
699 |
if (param_value == NULL) {
|
|
700 |
/* no parameter value given, so we pass a previously declared temporary variable. */
|
|
701 |
std::string *temp_var_name = temp_var_name_factory.new_name();
|
|
702 |
s4o.print(*temp_var_name);
|
|
703 |
delete temp_var_name;
|
|
704 |
} else {
|
|
705 |
param_value->accept(*this);
|
|
706 |
}
|
|
707 |
break;
|
|
708 |
case function_param_iterator_c::direction_extref:
|
|
709 |
/* TODO! */
|
|
710 |
ERROR;
|
|
711 |
break;
|
|
712 |
} /* switch */
|
|
713 |
} /* for(...) */
|
|
714 |
|
|
715 |
s4o.print(")");
|
|
716 |
/* the data type returned by the function, and stored in the il default variable... */
|
|
717 |
default_variable_name.current_type = return_data_type;
|
|
718 |
}
|
|
719 |
|
|
720 |
return NULL;
|
|
721 |
}
|
|
722 |
|
|
723 |
|
|
724 |
/* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */
|
|
725 |
//SYM_REF4(il_expression_c, il_expr_operator, il_operand, simple_instr_list, unused)
|
|
726 |
void *visit(il_expression_c *symbol) {
|
|
727 |
/* We will be recursevely interpreting an instruction list,
|
|
728 |
* so we store a backup of the data type of the value currently stored
|
|
729 |
* in the default variable, and set the current data type to NULL
|
|
730 |
*/
|
|
731 |
symbol_c *old_current_default_variable_data_type = this->default_variable_name.current_type;
|
|
732 |
this->default_variable_name.current_type = NULL;
|
|
733 |
|
|
734 |
/* Pass the symbol->il_operand to the simple_instr_list visitor
|
|
735 |
* using the il_default_variable_init_value parameter...
|
|
736 |
* Note that the simple_instr_list_c visitor will set this parameter
|
|
737 |
* to NULL as soon as it does not require it any longer,
|
|
738 |
* so we don't do it here again after the
|
|
739 |
* symbol->simple_instr_list->accept(*this);
|
|
740 |
* returns...
|
|
741 |
*/
|
|
742 |
this->il_default_variable_init_value = symbol->il_operand;
|
|
743 |
|
|
744 |
/* Now do the parenthesised instructions... */
|
|
745 |
/* NOTE: the following code line will get the variable
|
|
746 |
* this->default_variable_name.current_type updated!
|
|
747 |
*/
|
|
748 |
symbol->simple_instr_list->accept(*this);
|
|
749 |
|
|
750 |
/* Now do the operation, using the previous result! */
|
|
751 |
/* NOTE: The result of the previous instruction list will be stored
|
|
752 |
* in a variable named IL_DEFVAR_BACK. This is done in the visitor
|
|
753 |
* to instruction_list_c objects...
|
|
754 |
*/
|
|
755 |
this->current_operand = &(this->default_variable_back_name);
|
|
756 |
this->current_operand_type = this->default_variable_back_name.current_type;
|
|
757 |
|
|
758 |
this->default_variable_name.current_type = old_current_default_variable_data_type;
|
|
759 |
if (NULL == this->current_operand_type) ERROR;
|
|
760 |
|
|
761 |
symbol->il_expr_operator->accept(*this);
|
|
762 |
|
|
763 |
this->current_operand = NULL;
|
|
764 |
this->current_operand_type = NULL;
|
|
765 |
this->default_variable_back_name.current_type = NULL;
|
|
766 |
return NULL;
|
|
767 |
}
|
|
768 |
|
|
769 |
/* il_jump_operator label */
|
|
770 |
// SYM_REF2(il_jump_operation_c, il_jump_operator, label)
|
|
771 |
void *visit(il_jump_operation_c *symbol) {
|
|
772 |
/* Pass the symbol->label to the il_jump_operation visitor
|
|
773 |
* using the jump_label parameter...
|
|
774 |
*/
|
|
775 |
this->jump_label = symbol->label;
|
|
776 |
symbol->il_jump_operator->accept(*this);
|
|
777 |
this->jump_label = NULL;
|
|
778 |
|
|
779 |
return NULL;
|
|
780 |
}
|
|
781 |
|
|
782 |
/* il_call_operator prev_declared_fb_name
|
|
783 |
* | il_call_operator prev_declared_fb_name '(' ')'
|
|
784 |
* | il_call_operator prev_declared_fb_name '(' eol_list ')'
|
|
785 |
* | il_call_operator prev_declared_fb_name '(' il_operand_list ')'
|
|
786 |
* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
|
|
787 |
*/
|
|
788 |
// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list)
|
|
789 |
void *visit(il_fb_call_c *symbol) {
|
|
790 |
symbol->il_call_operator->accept(*this);
|
|
791 |
s4o.print("{\n");
|
|
792 |
s4o.indent_right();
|
|
793 |
s4o.print(s4o.indent_spaces);
|
|
794 |
|
|
795 |
/* first figure out what is the name of the function block type of the function block being called... */
|
|
796 |
symbol_c *function_block_type_name = this->search_fb_instance_decl->get_type_name(symbol->fb_name);
|
|
797 |
/* should never occur. The function block instance MUST have been declared... */
|
|
798 |
if (function_block_type_name == NULL) ERROR;
|
|
799 |
|
|
800 |
/* Now find the declaration of the function block type being called... */
|
|
801 |
function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(function_block_type_name);
|
|
802 |
/* should never occur. The function block type being called MUST be in the symtable... */
|
|
803 |
if (fb_decl == function_block_type_symtable.end_value()) ERROR;
|
|
804 |
|
|
805 |
/* loop through each function block parameter, find the value we should pass
|
|
806 |
* to it, and then output the c equivalent...
|
|
807 |
*/
|
|
808 |
function_param_iterator_c fp_iterator(fb_decl);
|
|
809 |
identifier_c *param_name;
|
|
810 |
function_call_param_iterator_c function_call_param_iterator(symbol);
|
|
811 |
for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
|
|
812 |
function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
|
|
813 |
|
|
814 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
|
|
815 |
symbol_c *param_value = function_call_param_iterator.search(param_name);
|
|
816 |
|
|
817 |
/* Get the value from a foo(<param_value>) style call */
|
|
818 |
if (param_value == NULL)
|
|
819 |
param_value = function_call_param_iterator.next();
|
|
820 |
|
98
|
821 |
symbol_c *param_type = fp_iterator.param_type();
|
|
822 |
if (param_type == NULL) ERROR;
|
|
823 |
|
|
824 |
search_base_type.explore_type(param_type);
|
|
825 |
|
70
|
826 |
/* now output the value assignment */
|
|
827 |
if (param_value != NULL)
|
|
828 |
if ((param_direction == function_param_iterator_c::direction_in) ||
|
|
829 |
(param_direction == function_param_iterator_c::direction_inout)) {
|
|
830 |
symbol->fb_name->accept(*this);
|
|
831 |
s4o.print(".");
|
|
832 |
param_name->accept(*this);
|
|
833 |
s4o.print(" = ");
|
98
|
834 |
if (search_base_type.base_is_subrange()) {
|
|
835 |
s4o.print("__CHECK_");
|
|
836 |
param_type->accept(*this);
|
|
837 |
s4o.print("(");
|
|
838 |
}
|
70
|
839 |
param_value->accept(*this);
|
98
|
840 |
if (search_base_type.base_is_subrange())
|
|
841 |
s4o.print(")");
|
70
|
842 |
s4o.print(";\n" + s4o.indent_spaces);
|
|
843 |
}
|
|
844 |
} /* for(...) */
|
|
845 |
|
|
846 |
/* now call the function... */
|
|
847 |
function_block_type_name->accept(*this);
|
|
848 |
s4o.print(FB_FUNCTION_SUFFIX);
|
|
849 |
s4o.print("(&");
|
|
850 |
symbol->fb_name->accept(*this);
|
|
851 |
s4o.print(")");
|
|
852 |
|
|
853 |
/* loop through each function parameter, find the variable to which
|
|
854 |
* we should atribute the value of all output or inoutput parameters.
|
|
855 |
*/
|
|
856 |
fp_iterator.reset();
|
|
857 |
function_call_param_iterator.reset();
|
|
858 |
for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
|
|
859 |
function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
|
|
860 |
|
|
861 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
|
|
862 |
symbol_c *param_value = function_call_param_iterator.search(param_name);
|
|
863 |
|
|
864 |
/* Get the value from a foo(<param_value>) style call */
|
|
865 |
if (param_value == NULL)
|
|
866 |
param_value = function_call_param_iterator.next();
|
|
867 |
|
|
868 |
/* now output the value assignment */
|
|
869 |
if (param_value != NULL)
|
|
870 |
if ((param_direction == function_param_iterator_c::direction_out) ||
|
|
871 |
(param_direction == function_param_iterator_c::direction_inout)) {
|
98
|
872 |
symbol_c *param_type = search_varfb_instance_type->get_type(param_value, false);
|
|
873 |
search_base_type.explore_type(param_type);
|
|
874 |
|
70
|
875 |
s4o.print(";\n"+ s4o.indent_spaces);
|
|
876 |
param_value->accept(*this);
|
|
877 |
s4o.print(" = ");
|
98
|
878 |
if (search_base_type.base_is_subrange()) {
|
|
879 |
s4o.print("__CHECK_");
|
|
880 |
param_type->accept(*this);
|
|
881 |
s4o.print("(");
|
|
882 |
}
|
70
|
883 |
symbol->fb_name->accept(*this);
|
|
884 |
s4o.print(".");
|
|
885 |
param_name->accept(*this);
|
98
|
886 |
if (search_base_type.base_is_subrange())
|
|
887 |
s4o.print(")");
|
70
|
888 |
}
|
|
889 |
} /* for(...) */
|
|
890 |
|
|
891 |
s4o.print(";\n");
|
|
892 |
s4o.indent_left();
|
|
893 |
s4o.print(s4o.indent_spaces);
|
|
894 |
s4o.print("}");
|
|
895 |
|
|
896 |
return NULL;
|
|
897 |
}
|
|
898 |
|
|
899 |
|
|
900 |
|
|
901 |
/* | function_name '(' eol_list [il_param_list] ')' */
|
|
902 |
// SYM_REF2(il_formal_funct_call_c, function_name, il_param_list)
|
|
903 |
void *visit(il_formal_funct_call_c *symbol) {
|
|
904 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
|
|
905 |
|
|
906 |
if (f_decl == function_symtable.end_value())
|
|
907 |
/* should never occur. The function being called MUST be in the symtable... */
|
|
908 |
ERROR;
|
|
909 |
|
|
910 |
symbol->function_name->accept(*this);
|
|
911 |
s4o.print("(");
|
|
912 |
|
|
913 |
/* loop through each function parameter, find the value we should pass
|
|
914 |
* to it, and then output the c equivalent...
|
|
915 |
*/
|
|
916 |
|
|
917 |
function_param_iterator_c fp_iterator(f_decl);
|
|
918 |
identifier_c *param_name;
|
|
919 |
function_call_param_iterator_c function_call_param_iterator(symbol);
|
|
920 |
for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
|
|
921 |
if (i != 1)
|
|
922 |
s4o.print(", ");
|
|
923 |
|
|
924 |
symbol_c *param_type = fp_iterator.param_type();
|
|
925 |
if (param_type == NULL) ERROR;
|
|
926 |
|
|
927 |
function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
|
|
928 |
|
|
929 |
|
|
930 |
symbol_c *param_value = NULL;
|
|
931 |
|
|
932 |
/* Get the value from a foo(<param_name> = <param_value>) style call */
|
|
933 |
if (param_value == NULL)
|
|
934 |
param_value = function_call_param_iterator.search(param_name);
|
|
935 |
|
|
936 |
/* Get the value from a foo(<param_value>) style call */
|
|
937 |
/* NOTE: the following line of code is not required in this case, but it doesn't
|
|
938 |
* harm to leave it in, as in the case of a formal syntax function call,
|
|
939 |
* it will always return NULL.
|
|
940 |
* We leave it in in case we later decide to merge this part of the code together
|
|
941 |
* with the function calling code in generate_c_st_c, which does require
|
|
942 |
* the following line...
|
|
943 |
*/
|
|
944 |
if (param_value == NULL)
|
|
945 |
param_value = function_call_param_iterator.next();
|
|
946 |
|
98
|
947 |
search_base_type.explore_type(param_type);
|
|
948 |
|
70
|
949 |
switch (param_direction) {
|
|
950 |
case function_param_iterator_c::direction_in:
|
|
951 |
if (param_value == NULL) {
|
|
952 |
/* No value given for parameter, so we must use the default... */
|
|
953 |
/* First check whether default value specified in function declaration...*/
|
|
954 |
param_value = fp_iterator.default_value();
|
|
955 |
}
|
|
956 |
if (param_value == NULL) {
|
|
957 |
/* If not, get the default value of this variable's type */
|
|
958 |
param_value = (symbol_c *)param_type->accept(*type_initial_value_c::instance());
|
|
959 |
}
|
|
960 |
if (param_value == NULL) ERROR;
|
98
|
961 |
if (search_base_type.base_is_subrange()) {
|
|
962 |
s4o.print("__CHECK_");
|
|
963 |
param_type->accept(*this);
|
|
964 |
s4o.print("(");
|
|
965 |
}
|
70
|
966 |
param_value->accept(*this);
|
98
|
967 |
if (search_base_type.base_is_subrange())
|
|
968 |
s4o.print(")");
|
70
|
969 |
break;
|
|
970 |
case function_param_iterator_c::direction_out:
|
|
971 |
case function_param_iterator_c::direction_inout:
|
|
972 |
if (param_value == NULL) {
|
|
973 |
/* no parameter value given, so we pass a previously declared temporary variable. */
|
|
974 |
std::string *temp_var_name = temp_var_name_factory.new_name();
|
|
975 |
s4o.print(*temp_var_name);
|
|
976 |
delete temp_var_name;
|
|
977 |
} else {
|
|
978 |
param_value->accept(*this);
|
|
979 |
}
|
|
980 |
break;
|
|
981 |
case function_param_iterator_c::direction_extref:
|
|
982 |
/* TODO! */
|
|
983 |
ERROR;
|
|
984 |
break;
|
|
985 |
} /* switch */
|
|
986 |
} /* for(...) */
|
|
987 |
|
|
988 |
// symbol->parameter_assignment->accept(*this);
|
|
989 |
s4o.print(")");
|
|
990 |
return NULL;
|
|
991 |
}
|
|
992 |
|
|
993 |
|
|
994 |
/* | il_operand_list ',' il_operand */
|
|
995 |
// SYM_LIST(il_operand_list_c)
|
|
996 |
void *visit(il_operand_list_c *symbol) {ERROR; return NULL;} // should never get called!
|
|
997 |
|
|
998 |
|
|
999 |
/* | simple_instr_list il_simple_instruction */
|
|
1000 |
// SYM_LIST(simple_instr_list_c)
|
|
1001 |
void *visit(simple_instr_list_c *symbol) {
|
|
1002 |
/* A simple_instr_list_c is used to store a list of il operations
|
|
1003 |
* being done within parenthesis...
|
|
1004 |
*
|
|
1005 |
* e.g.:
|
|
1006 |
* LD var1
|
|
1007 |
* AND ( var2
|
|
1008 |
* OR var3
|
|
1009 |
* OR var4
|
|
1010 |
* )
|
|
1011 |
*
|
|
1012 |
* This will be converted to C++ by defining a new scope
|
|
1013 |
* with a new il default variable, and executing the il operands
|
|
1014 |
* within this new scope.
|
|
1015 |
* At the end of the scope the result, i.e. the value currently stored
|
|
1016 |
* in the il default variable is copied to the variable used to take this
|
|
1017 |
* value to the outside scope...
|
|
1018 |
*
|
|
1019 |
* The above example will result in the following C++ code:
|
|
1020 |
* {__IL_DEFVAR_T __IL_DEFVAR_BACK;
|
|
1021 |
* __IL_DEFVAR_T __IL_DEFVAR;
|
|
1022 |
*
|
|
1023 |
* __IL_DEFVAR.INTvar = var1;
|
|
1024 |
* {
|
|
1025 |
* __IL_DEFVAR_T __IL_DEFVAR;
|
|
1026 |
*
|
|
1027 |
* __IL_DEFVAR.INTvar = var2;
|
|
1028 |
* __IL_DEFVAR.INTvar |= var3;
|
|
1029 |
* __IL_DEFVAR.INTvar |= var4;
|
|
1030 |
*
|
|
1031 |
* __IL_DEFVAR_BACK = __IL_DEFVAR;
|
|
1032 |
* }
|
|
1033 |
* __IL_DEFVAR.INTvar &= __IL_DEFVAR_BACK.INTvar;
|
|
1034 |
*
|
|
1035 |
* }
|
|
1036 |
*
|
|
1037 |
* The intial value of the il default variable (in the above
|
|
1038 |
* example 'var2') is passed to this simple_instr_list_c visitor
|
|
1039 |
* using the il_default_variable_init_value parameter.
|
|
1040 |
* Since it is possible to have parenthesis inside other parenthesis
|
|
1041 |
* recursively, we reset the il_default_variable_init_value to NULL
|
|
1042 |
* as soon as we no longer require it, as it may be used once again
|
|
1043 |
* in the line
|
|
1044 |
* print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
|
|
1045 |
*
|
|
1046 |
*/
|
|
1047 |
|
|
1048 |
/* Declare the default variable, that will store the result of the IL operations... */
|
|
1049 |
s4o.print("{\n");
|
|
1050 |
s4o.indent_right();
|
|
1051 |
|
|
1052 |
s4o.print(s4o.indent_spaces);
|
|
1053 |
s4o.print(IL_DEFVAR_T);
|
|
1054 |
s4o.print(" ");
|
|
1055 |
this->default_variable_name.accept(*this);
|
|
1056 |
s4o.print(";\n\n");
|
|
1057 |
|
|
1058 |
/* Check whether we should initiliase the il default variable... */
|
|
1059 |
if (NULL != this->il_default_variable_init_value) {
|
|
1060 |
/* Yes, we must... */
|
|
1061 |
/* We will do it by instatiating a LD operator, and having this
|
|
1062 |
* same generate_c_il_c class visiting it!
|
|
1063 |
*/
|
|
1064 |
LD_operator_c ld_oper;
|
|
1065 |
il_simple_operation_c il_simple_oper(&ld_oper, this->il_default_variable_init_value);
|
|
1066 |
|
|
1067 |
s4o.print(s4o.indent_spaces);
|
|
1068 |
il_simple_oper.accept(*this);
|
|
1069 |
s4o.print(";\n");
|
|
1070 |
}
|
|
1071 |
|
|
1072 |
/* this parameter no longer required... */
|
|
1073 |
this->il_default_variable_init_value = NULL;
|
|
1074 |
|
|
1075 |
print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
|
|
1076 |
|
|
1077 |
/* copy the result in the default variable to the variable
|
|
1078 |
* used to pass the data out to the scope enclosing
|
|
1079 |
* the current scope!
|
|
1080 |
*
|
|
1081 |
* We also need to update the data type currently stored within
|
|
1082 |
* the variable used to pass the data to the outside scope...
|
|
1083 |
*/
|
|
1084 |
this->default_variable_back_name.current_type = this->default_variable_name.current_type;
|
|
1085 |
s4o.print("\n");
|
|
1086 |
s4o.print(s4o.indent_spaces);
|
|
1087 |
this->default_variable_back_name.accept(*this);
|
|
1088 |
s4o.print(" = ");
|
|
1089 |
this->default_variable_name.accept(*this);
|
|
1090 |
s4o.print(";\n");
|
|
1091 |
|
|
1092 |
s4o.indent_left();
|
|
1093 |
s4o.print(s4o.indent_spaces);
|
|
1094 |
s4o.print("}\n");
|
|
1095 |
s4o.print(s4o.indent_spaces);
|
|
1096 |
return NULL;
|
|
1097 |
}
|
|
1098 |
|
|
1099 |
/* | il_initial_param_list il_param_instruction */
|
|
1100 |
// SYM_LIST(il_param_list_c)
|
|
1101 |
void *visit(il_param_list_c *symbol) {ERROR; return NULL;} // should never get called!
|
|
1102 |
|
|
1103 |
/* il_assign_operator il_operand
|
|
1104 |
* | il_assign_operator '(' eol_list simple_instr_list ')'
|
|
1105 |
*/
|
|
1106 |
// SYM_REF4(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list, unused)
|
|
1107 |
void *visit(il_param_assignment_c *symbol) {ERROR; return NULL;} // should never get called!
|
|
1108 |
|
|
1109 |
/* il_assign_out_operator variable */
|
|
1110 |
// SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable);
|
|
1111 |
void *visit(il_param_out_assignment_c *symbol) {ERROR; return NULL;} // should never get called!
|
|
1112 |
|
|
1113 |
/*******************/
|
|
1114 |
/* B 2.2 Operators */
|
|
1115 |
/*******************/
|
|
1116 |
|
|
1117 |
void *visit(LD_operator_c *symbol) {
|
|
1118 |
/* the data type resulting from this operation... */
|
|
1119 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1120 |
XXX_operator(&(this->default_variable_name), " = ", this->current_operand);
|
|
1121 |
return NULL;
|
|
1122 |
}
|
|
1123 |
|
|
1124 |
void *visit(LDN_operator_c *symbol) {
|
|
1125 |
/* the data type resulting from this operation... */
|
|
1126 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1127 |
XXX_operator(&(this->default_variable_name),
|
|
1128 |
search_expression_type->is_bool_type(this->current_operand_type)?" = !":" = ~",
|
|
1129 |
this->current_operand);
|
|
1130 |
return NULL;
|
|
1131 |
}
|
|
1132 |
|
|
1133 |
void *visit(ST_operator_c *symbol) {
|
98
|
1134 |
symbol_c *operand_type = search_varfb_instance_type->get_type(this->current_operand, false);
|
|
1135 |
search_base_type.explore_type(operand_type);
|
|
1136 |
|
|
1137 |
this->current_operand->accept(*this);
|
|
1138 |
s4o.print(" = ");
|
|
1139 |
if (search_base_type.base_is_subrange()) {
|
|
1140 |
s4o.print("__CHECK_");
|
|
1141 |
operand_type->accept(*this);
|
|
1142 |
s4o.print("(");
|
|
1143 |
}
|
|
1144 |
this->default_variable_name.accept(*this);
|
|
1145 |
if (search_base_type.base_is_subrange())
|
|
1146 |
s4o.print(")");
|
70
|
1147 |
/* the data type resulting from this operation is unchamged. */
|
|
1148 |
return NULL;
|
|
1149 |
}
|
|
1150 |
|
|
1151 |
void *visit(STN_operator_c *symbol) {
|
98
|
1152 |
symbol_c *operand_type = search_varfb_instance_type->get_type(this->current_operand, false);
|
|
1153 |
search_base_type.explore_type(operand_type);
|
|
1154 |
|
|
1155 |
this->current_operand->accept(*this);
|
|
1156 |
s4o.print(" = ");
|
|
1157 |
if (search_base_type.base_is_subrange()) {
|
|
1158 |
s4o.print("__CHECK_");
|
|
1159 |
operand_type->accept(*this);
|
|
1160 |
s4o.print("(");
|
|
1161 |
}
|
|
1162 |
if (search_expression_type->is_bool_type(this->current_operand_type))
|
|
1163 |
s4o.print("!");
|
|
1164 |
else
|
|
1165 |
s4o.print("~");
|
|
1166 |
this->default_variable_name.accept(*this);
|
|
1167 |
if (search_base_type.base_is_subrange())
|
|
1168 |
s4o.print(")");
|
70
|
1169 |
/* the data type resulting from this operation is unchamged. */
|
|
1170 |
return NULL;
|
|
1171 |
}
|
|
1172 |
|
|
1173 |
void *visit(NOT_operator_c *symbol) {
|
|
1174 |
if ((NULL != this->current_operand) || (NULL != this->current_operand_type)) ERROR;
|
|
1175 |
XXX_operator(&(this->default_variable_name),
|
|
1176 |
search_expression_type->is_bool_type(this->default_variable_name.current_type)?" = !":" = ~",
|
|
1177 |
&(this->default_variable_name));
|
|
1178 |
/* the data type resulting from this operation is unchanged. */
|
|
1179 |
return NULL;
|
|
1180 |
}
|
|
1181 |
|
|
1182 |
void *visit(S_operator_c *symbol) {
|
|
1183 |
if ((NULL == this->current_operand) || (NULL == this->current_operand_type)) ERROR;
|
|
1184 |
|
|
1185 |
C_modifier();
|
|
1186 |
this->current_operand->accept(*this);
|
|
1187 |
s4o.print(search_expression_type->is_bool_type(this->current_operand_type)?" = true":" = 1");
|
|
1188 |
/* the data type resulting from this operation is unchanged! */
|
|
1189 |
return NULL;
|
|
1190 |
}
|
|
1191 |
|
|
1192 |
void *visit(R_operator_c *symbol) {
|
|
1193 |
if ((NULL == this->current_operand) || (NULL == this->current_operand_type)) ERROR;
|
|
1194 |
|
|
1195 |
C_modifier();
|
|
1196 |
this->current_operand->accept(*this);
|
|
1197 |
s4o.print(search_expression_type->is_bool_type(this->current_operand_type)?" = false":" = 0");
|
|
1198 |
/* the data type resulting from this operation is unchanged! */
|
|
1199 |
return NULL;
|
|
1200 |
}
|
|
1201 |
|
|
1202 |
void *visit(S1_operator_c *symbol) {return XXX_CAL_operator("S1", this->current_operand);}
|
|
1203 |
void *visit(R1_operator_c *symbol) {return XXX_CAL_operator("R1", this->current_operand);}
|
|
1204 |
void *visit(CLK_operator_c *symbol) {return XXX_CAL_operator("CLK", this->current_operand);}
|
|
1205 |
void *visit(CU_operator_c *symbol) {return XXX_CAL_operator("CU", this->current_operand);}
|
|
1206 |
void *visit(CD_operator_c *symbol) {return XXX_CAL_operator("CD", this->current_operand);}
|
|
1207 |
void *visit(PV_operator_c *symbol) {return XXX_CAL_operator("PV", this->current_operand);}
|
|
1208 |
void *visit(IN_operator_c *symbol) {return XXX_CAL_operator("IN", this->current_operand);}
|
|
1209 |
void *visit(PT_operator_c *symbol) {return XXX_CAL_operator("PT", this->current_operand);}
|
|
1210 |
|
|
1211 |
void *visit(AND_operator_c *symbol) {
|
|
1212 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1213 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1214 |
XXX_operator(&(this->default_variable_name), " &= ", this->current_operand);
|
|
1215 |
/* the data type resulting from this operation... */
|
|
1216 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1217 |
}
|
|
1218 |
else {ERROR;}
|
|
1219 |
return NULL;
|
|
1220 |
}
|
|
1221 |
|
|
1222 |
void *visit(OR_operator_c *symbol) {
|
|
1223 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1224 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1225 |
XXX_operator(&(this->default_variable_name), " |= ", this->current_operand);
|
|
1226 |
/* the data type resulting from this operation... */
|
|
1227 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1228 |
}
|
|
1229 |
else {ERROR;}
|
|
1230 |
return NULL;
|
|
1231 |
}
|
|
1232 |
|
|
1233 |
void *visit(XOR_operator_c *symbol) {
|
|
1234 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1235 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1236 |
// '^' is a bit by bit exclusive OR !! Also seems to work with boolean types!
|
|
1237 |
XXX_operator(&(this->default_variable_name), " ^= ", this->current_operand);
|
|
1238 |
/* the data type resulting from this operation... */
|
|
1239 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1240 |
}
|
|
1241 |
else {ERROR;}
|
|
1242 |
return NULL;
|
|
1243 |
}
|
|
1244 |
|
|
1245 |
void *visit(ANDN_operator_c *symbol) {
|
|
1246 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1247 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1248 |
XXX_operator(&(this->default_variable_name),
|
|
1249 |
search_expression_type->is_bool_type(this->current_operand_type)?" &= !":" &= ~",
|
|
1250 |
this->current_operand);
|
|
1251 |
/* the data type resulting from this operation... */
|
|
1252 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1253 |
}
|
|
1254 |
else {ERROR;}
|
|
1255 |
return NULL;
|
|
1256 |
}
|
|
1257 |
|
|
1258 |
void *visit(ORN_operator_c *symbol) {
|
|
1259 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1260 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1261 |
XXX_operator(&(this->default_variable_name),
|
|
1262 |
search_expression_type->is_bool_type(this->current_operand_type)?" |= !":" |= ~",
|
|
1263 |
this->current_operand);
|
|
1264 |
/* the data type resulting from this operation... */
|
|
1265 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1266 |
}
|
|
1267 |
else {ERROR;}
|
|
1268 |
return NULL;
|
|
1269 |
}
|
|
1270 |
|
|
1271 |
void *visit(XORN_operator_c *symbol) {
|
|
1272 |
if (search_expression_type->is_binary_type(this->default_variable_name.current_type) &&
|
|
1273 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1274 |
XXX_operator(&(this->default_variable_name),
|
|
1275 |
// bit by bit exclusive OR !! Also seems to work with boolean types!
|
|
1276 |
search_expression_type->is_bool_type(this->current_operand_type)?" ^= !":" ^= ~",
|
|
1277 |
this->current_operand);
|
|
1278 |
/* the data type resulting from this operation... */
|
|
1279 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1280 |
}
|
|
1281 |
else {ERROR;}
|
|
1282 |
return NULL;
|
|
1283 |
}
|
|
1284 |
|
|
1285 |
void *visit(ADD_operator_c *symbol) {
|
|
1286 |
if (search_expression_type->is_time_type(this->default_variable_name.current_type) &&
|
|
1287 |
search_expression_type->is_time_type(this->current_operand_type)) {
|
|
1288 |
XXX_function("__time_add", &(this->default_variable_name), this->current_operand);
|
|
1289 |
/* the data type resulting from this operation... */
|
|
1290 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1291 |
return NULL;
|
|
1292 |
}
|
|
1293 |
if (search_expression_type->is_num_type(this->default_variable_name.current_type) &&
|
|
1294 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1295 |
XXX_operator(&(this->default_variable_name), " += ", this->current_operand);
|
|
1296 |
/* the data type resulting from this operation... */
|
|
1297 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1298 |
return NULL;
|
|
1299 |
}
|
|
1300 |
ERROR;
|
|
1301 |
return NULL;
|
|
1302 |
}
|
|
1303 |
|
|
1304 |
void *visit(SUB_operator_c *symbol) {
|
|
1305 |
if (search_expression_type->is_time_type(this->default_variable_name.current_type) &&
|
|
1306 |
search_expression_type->is_time_type(this->current_operand_type)) {
|
|
1307 |
XXX_function("__time_sub", &(this->default_variable_name), this->current_operand);
|
|
1308 |
/* the data type resulting from this operation... */
|
|
1309 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1310 |
return NULL;
|
|
1311 |
}
|
|
1312 |
if (search_expression_type->is_num_type(this->default_variable_name.current_type) &&
|
|
1313 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1314 |
XXX_operator(&(this->default_variable_name), " -= ", this->current_operand);
|
|
1315 |
/* the data type resulting from this operation... */
|
|
1316 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1317 |
return NULL;
|
|
1318 |
}
|
|
1319 |
ERROR;
|
|
1320 |
return NULL;
|
|
1321 |
}
|
|
1322 |
|
|
1323 |
void *visit(MUL_operator_c *symbol) {
|
|
1324 |
if (search_expression_type->is_time_type(this->default_variable_name.current_type) &&
|
|
1325 |
search_expression_type->is_integer_type(this->current_operand_type)) {
|
|
1326 |
XXX_function("__time_mul", &(this->default_variable_name), this->current_operand);
|
|
1327 |
/* the data type resulting from this operation... */
|
|
1328 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1329 |
return NULL;
|
|
1330 |
}
|
|
1331 |
if (search_expression_type->is_num_type(this->default_variable_name.current_type) &&
|
|
1332 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1333 |
XXX_operator(&(this->default_variable_name), " *= ", this->current_operand);
|
|
1334 |
/* the data type resulting from this operation... */
|
|
1335 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1336 |
return NULL;
|
|
1337 |
}
|
|
1338 |
ERROR;
|
|
1339 |
return NULL;
|
|
1340 |
}
|
|
1341 |
|
|
1342 |
void *visit(DIV_operator_c *symbol) {
|
|
1343 |
if (search_expression_type->is_num_type(this->default_variable_name.current_type) &&
|
|
1344 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1345 |
XXX_operator(&(this->default_variable_name), " /= ", this->current_operand);
|
|
1346 |
/* the data type resulting from this operation... */
|
|
1347 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1348 |
}
|
|
1349 |
else {ERROR;}
|
|
1350 |
return NULL;
|
|
1351 |
}
|
|
1352 |
|
|
1353 |
void *visit(MOD_operator_c *symbol) {
|
|
1354 |
if (search_expression_type->is_num_type(this->default_variable_name.current_type) &&
|
|
1355 |
search_expression_type->is_same_type(this->default_variable_name.current_type, this->current_operand_type)) {
|
|
1356 |
XXX_operator(&(this->default_variable_name), " %= ", this->current_operand);
|
|
1357 |
/* the data type resulting from this operation... */
|
|
1358 |
this->default_variable_name.current_type = this->current_operand_type;
|
|
1359 |
}
|
|
1360 |
else {ERROR;}
|
|
1361 |
return NULL;
|
|
1362 |
}
|
|
1363 |
|
|
1364 |
void *visit(GT_operator_c *symbol) {
|
|
1365 |
return CMP_operator(this->current_operand, "__gt_");
|
|
1366 |
}
|
|
1367 |
|
|
1368 |
void *visit(GE_operator_c *symbol) {
|
|
1369 |
return CMP_operator(this->current_operand, "__ge_");
|
|
1370 |
}
|
|
1371 |
|
|
1372 |
void *visit(EQ_operator_c *symbol) {
|
|
1373 |
return CMP_operator(this->current_operand, "__eq_");
|
|
1374 |
}
|
|
1375 |
|
|
1376 |
void *visit(LT_operator_c *symbol) {
|
|
1377 |
return CMP_operator(this->current_operand, "__lt_");
|
|
1378 |
}
|
|
1379 |
|
|
1380 |
void *visit(LE_operator_c *symbol) {
|
|
1381 |
return CMP_operator(this->current_operand, "__le_");
|
|
1382 |
}
|
|
1383 |
|
|
1384 |
void *visit(NE_operator_c *symbol) {
|
|
1385 |
return CMP_operator(this->current_operand, "__ne_");
|
|
1386 |
}
|
|
1387 |
|
|
1388 |
|
|
1389 |
//SYM_REF0(CAL_operator_c)
|
|
1390 |
// This method will be called from within the il_fb_call_c visitor method
|
|
1391 |
void *visit(CAL_operator_c *symbol) {return NULL;}
|
|
1392 |
|
|
1393 |
//SYM_REF0(CALC_operator_c)
|
|
1394 |
// This method will be called from within the il_fb_call_c visitor method
|
|
1395 |
void *visit(CALC_operator_c *symbol) {C_modifier(); return NULL;}
|
|
1396 |
|
|
1397 |
//SYM_REF0(CALCN_operator_c)
|
|
1398 |
// This method will be called from within the il_fb_call_c visitor method
|
|
1399 |
void *visit(CALCN_operator_c *symbol) {CN_modifier(); return NULL;}
|
|
1400 |
|
|
1401 |
/* NOTE: The semantics of the RET operator requires us to return a value
|
|
1402 |
* if the IL code is inside a function, but simply return no value if
|
|
1403 |
* the IL code is inside a function block or program!
|
|
1404 |
* Nevertheless, it is the generate_c_c class itself that
|
|
1405 |
* introduces the 'reaturn <value>' into the c++ code at the end
|
|
1406 |
* of every function. This class does not know whether the IL code
|
|
1407 |
* is inside a function or a function block.
|
|
1408 |
* We work around this by jumping to the end of the code,
|
|
1409 |
* that will be marked by the END_LABEL label in the
|
|
1410 |
* instruction_list_c visitor...
|
|
1411 |
*/
|
|
1412 |
// SYM_REF0(RET_operator_c)
|
|
1413 |
void *visit(RET_operator_c *symbol) {
|
|
1414 |
s4o.print("goto ");s4o.print(END_LABEL);
|
|
1415 |
return NULL;
|
|
1416 |
}
|
|
1417 |
|
|
1418 |
// SYM_REF0(RETC_operator_c)
|
|
1419 |
void *visit(RETC_operator_c *symbol) {
|
|
1420 |
C_modifier();
|
|
1421 |
s4o.print("goto ");s4o.print(END_LABEL);
|
|
1422 |
return NULL;
|
|
1423 |
}
|
|
1424 |
|
|
1425 |
// SYM_REF0(RETCN_operator_c)
|
|
1426 |
void *visit(RETCN_operator_c *symbol) {
|
|
1427 |
CN_modifier();
|
|
1428 |
s4o.print("goto ");s4o.print(END_LABEL);
|
|
1429 |
return NULL;
|
|
1430 |
}
|
|
1431 |
|
|
1432 |
//SYM_REF0(JMP_operator_c)
|
|
1433 |
void *visit(JMP_operator_c *symbol) {
|
|
1434 |
if (NULL == this->jump_label) ERROR;
|
|
1435 |
|
|
1436 |
s4o.print("goto ");
|
|
1437 |
this->jump_label->accept(*this);
|
|
1438 |
/* the data type resulting from this operation is unchanged! */
|
|
1439 |
return NULL;
|
|
1440 |
}
|
|
1441 |
|
|
1442 |
// SYM_REF0(JMPC_operator_c)
|
|
1443 |
void *visit(JMPC_operator_c *symbol) {
|
|
1444 |
if (NULL == this->jump_label) ERROR;
|
|
1445 |
|
|
1446 |
C_modifier();
|
|
1447 |
s4o.print("goto ");
|
|
1448 |
this->jump_label->accept(*this);
|
|
1449 |
/* the data type resulting from this operation is unchanged! */
|
|
1450 |
return NULL;
|
|
1451 |
}
|
|
1452 |
|
|
1453 |
// SYM_REF0(JMPCN_operator_c)
|
|
1454 |
void *visit(JMPCN_operator_c *symbol) {
|
|
1455 |
if (NULL == this->jump_label) ERROR;
|
|
1456 |
|
|
1457 |
CN_modifier();
|
|
1458 |
s4o.print("goto ");
|
|
1459 |
this->jump_label->accept(*this);
|
|
1460 |
/* the data type resulting from this operation is unchanged! */
|
|
1461 |
return NULL;
|
|
1462 |
}
|
|
1463 |
|
|
1464 |
#if 0
|
|
1465 |
/*| [NOT] any_identifier SENDTO */
|
|
1466 |
SYM_REF2(il_assign_out_operator_c, option, variable_name)
|
|
1467 |
#endif
|
|
1468 |
|
|
1469 |
}; /* generate_c_il_c */
|
|
1470 |
|
|
1471 |
|
|
1472 |
|
|
1473 |
|
|
1474 |
|
|
1475 |
|
|
1476 |
|
|
1477 |
|
|
1478 |
|
|
1479 |
/* The implementation of the single visit() member function
|
|
1480 |
* of il_default_variable_c.
|
|
1481 |
* It can only come after the full declaration of
|
|
1482 |
* generate_c_il_c. Since we define and declare
|
|
1483 |
* generate_c_il_c simultaneously, it can only come
|
|
1484 |
* after the definition...
|
|
1485 |
*/
|
|
1486 |
void *il_default_variable_c::accept(visitor_c &visitor) {
|
|
1487 |
/* An ugly hack!! */
|
|
1488 |
/* This is required because we need to over-ride the base
|
|
1489 |
* accept(visitor_c &) method of the class symbol_c,
|
|
1490 |
* so this method may be called through a symbol_c *
|
|
1491 |
* reference!
|
|
1492 |
*
|
|
1493 |
* But, the visitor_c does not include a visitor to
|
|
1494 |
* an il_default_variable_c, which means that we couldn't
|
|
1495 |
* simply call visitor.visit(this);
|
|
1496 |
*
|
|
1497 |
* We therefore need to use the dynamic_cast hack!!
|
|
1498 |
*
|
|
1499 |
* Note too that we can't cast a visitor_c to a
|
|
1500 |
* il_default_variable_visitor_c, since they are not related.
|
|
1501 |
* Nor may the il_default_variable_visitor_c inherit from
|
|
1502 |
* visitor_c, because then generate_c_il_c would contain
|
|
1503 |
* two visitor_c base classes, one each through
|
|
1504 |
* il_default_variable_visitor_c and generate_c_type_c
|
|
1505 |
*
|
|
1506 |
* We could use virtual inheritance of the visitor_c, but it
|
|
1507 |
* would probably create more problems than it is worth!
|
|
1508 |
*/
|
|
1509 |
generate_c_il_c *v;
|
|
1510 |
v = dynamic_cast<generate_c_il_c *>(&visitor);
|
|
1511 |
if (v == NULL) ERROR;
|
|
1512 |
|
|
1513 |
return v->visit(this);
|
|
1514 |
}
|
|
1515 |
|
|
1516 |
|
|
1517 |
|
|
1518 |
|
|
1519 |
il_default_variable_c::il_default_variable_c(const char *var_name_str, symbol_c *current_type) {
|
|
1520 |
if (NULL == var_name_str) ERROR;
|
|
1521 |
/* Note: current_type may start off with NULL */
|
|
1522 |
|
|
1523 |
this->var_name = new identifier_c(var_name_str);
|
|
1524 |
if (NULL == this->var_name) ERROR;
|
|
1525 |
|
|
1526 |
this->current_type = current_type;
|
|
1527 |
}
|