etisserant@0: /*
etisserant@0:  * (c) 2003 Mario de Sousa
etisserant@0:  *
etisserant@0:  * Offered to the public under the terms of the GNU General Public License
etisserant@0:  * as published by the Free Software Foundation; either version 2 of the
etisserant@0:  * License, or (at your option) any later version.
etisserant@0:  *
etisserant@0:  * This program is distributed in the hope that it will be useful, but
etisserant@0:  * WITHOUT ANY WARRANTY; without even the implied warranty of
etisserant@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
etisserant@0:  * Public License for more details.
etisserant@0:  *
etisserant@0:  * This code is made available on the understanding that it will not be
etisserant@0:  * used in safety-critical situations without a full and competent review.
etisserant@0:  */
etisserant@0: 
etisserant@0: /*
etisserant@0:  * An IEC 61131-3 IL and ST compiler.
etisserant@0:  *
etisserant@0:  * Based on the
etisserant@0:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
etisserant@0:  *
etisserant@0:  */
etisserant@0: 
etisserant@0: 
etisserant@0: /*
etisserant@0:  * Conversion of st statements (i.e. ST code).
etisserant@0:  *
etisserant@0:  * This is part of the 4th stage that generates
etisserant@0:  * a c++ source program equivalent to the IL and ST
etisserant@0:  * code.
etisserant@0:  */
etisserant@0: 
etisserant@0: 
lbessard@16: /***********************************************************************/
lbessard@16: /***********************************************************************/
lbessard@16: /***********************************************************************/
lbessard@16: /***********************************************************************/
etisserant@0: 
etisserant@0: 
etisserant@0: class generate_cc_st_c: public generate_cc_typedecl_c {
etisserant@0: 
etisserant@0:   private:
etisserant@0:     /* When calling a function block, we must first find it's type,
etisserant@0:      * by searching through the declarations of the variables currently
etisserant@0:      * in scope.
etisserant@0:      * This class does just that...
etisserant@0:      * A new class is instantiated whenever we begin generating the code
etisserant@0:      * for a function block type declaration, or a program declaration.
etisserant@0:      * This object instance will then later be called while the
etisserant@0:      * function block's or the program's body is being handled.
etisserant@0:      *
etisserant@0:      * Note that functions cannot contain calls to function blocks,
etisserant@0:      * so we do not create an object instance when handling
etisserant@0:      * a function declaration.
etisserant@0:      */
etisserant@0:     search_fb_instance_decl_c *search_fb_instance_decl;
etisserant@0: 
lbessard@16:     /* When compiling st code, it becomes necessary to determine the
lbessard@16:      * data type of st expressions. To do this, we must first find the
lbessard@16:      * st operand's declaration, within the scope of the function block
lbessard@16:      * or function currently being processed.
lbessard@16:      * The following object does just that...
lbessard@16:      * This object instance will then later be called while the
lbessard@16:      * remaining st code is being handled.
lbessard@16:      */
lbessard@16:     search_expression_type_c *search_expression_type;
etisserant@0: 
etisserant@0:   public:
etisserant@0:     generate_cc_st_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL)
etisserant@0:     : generate_cc_typedecl_c(s4o_ptr) {
etisserant@0:       search_fb_instance_decl = new search_fb_instance_decl_c(scope);
lbessard@16:       search_expression_type = new search_expression_type_c(scope);
etisserant@0:       this->set_variable_prefix(variable_prefix);
etisserant@0:     }
etisserant@0: 
etisserant@0:     virtual ~generate_cc_st_c(void) {
etisserant@0:       delete search_fb_instance_decl;
lbessard@16:       delete search_expression_type;
etisserant@0:     }
etisserant@0: 
etisserant@0: 
etisserant@0:   private:
etisserant@0:     /* Some function calls in the body of functions or function blocks
etisserant@0:      * may leave some parameters to their default values, and
etisserant@0:      * ignore some output parameters of the function being called.
etisserant@0:      * Our conversion of ST functions to C++ does not contemplate that,
etisserant@0:      * i.e. each called function must get all it's input and output
etisserant@0:      * parameters set correctly.
etisserant@0:      * For input parameters we merely need to call the function with
etisserant@0:      * the apropriate default value, but for output parameters
etisserant@0:      * we must create temporary variables to hold the output value.
etisserant@0:      *
etisserant@0:      * We declare all the temporary output variables at the begining of
etisserant@0:      * the body of each function or function block, and use them as
etisserant@0:      * in function calls later on as they become necessary...
etisserant@0:      * Note that we cannot create these variables just before a function
etisserant@0:      * call, as the function call itself may be integrated within an
etisserant@0:      * expression, or another function call!
etisserant@0:      *
etisserant@0:      * The variables are declared in the exact same order in which they
etisserant@0:      * will be used later on during the function calls, which allows us
etisserant@0:      * to simply re-create the name that was used for the temporary variable
etisserant@0:      * instead of keeping it in some list.
etisserant@0:      * The names are recreated by the temp_var_name_factory, after reset()
etisserant@0:      * has been called!
etisserant@0:      *
etisserant@0:      * This function will genertae code similar to...
etisserant@0:      *
etisserant@0:      *     INT __TMP_0 = 23;
etisserant@0:      *     REAL __TMP_1 = 45.5;
etisserant@0:      *     ...
etisserant@0:      */
etisserant@0:     temp_var_name_c temp_var_name_factory;
etisserant@0: 
etisserant@0:   public:
etisserant@0:     void generate(statement_list_c *stl) {
etisserant@0:       generate_cc_tempvardecl_c generate_cc_tempvardecl(&s4o);
etisserant@0:       generate_cc_tempvardecl.generate(stl, &temp_var_name_factory);
etisserant@0:       stl->accept(*this);
etisserant@0:     }
etisserant@0: 
etisserant@0:   private:
lbessard@16:   
etisserant@0: /***************************************/
etisserant@0: /* B.3 - Language ST (Structured Text) */
etisserant@0: /***************************************/
etisserant@0: /***********************/
etisserant@0: /* B 3.1 - Expressions */
etisserant@0: /***********************/
lbessard@16: void *visit(or_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (typeid(*left_type) == typeid(bool_type_name_c) && typeid(*right_type) == typeid(bool_type_name_c)) {
lbessard@16:     return print_binary_expression(symbol->l_exp, symbol->r_exp, " || ");
lbessard@16:   }
lbessard@16:   if (search_expression_type->is_numeric_compatible(left_type) && search_expression_type->is_numeric_compatible(right_type)) {
lbessard@16:     return print_binary_expression(symbol->l_exp, symbol->r_exp, " | ");
lbessard@16:   }
lbessard@16:   ERROR;
lbessard@16:   return NULL;
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(xor_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (typeid(*left_type) == typeid(bool_type_name_c) && typeid(*right_type) == typeid(bool_type_name_c)) {
lbessard@16:     s4o.print("(");
lbessard@16:     symbol->l_exp->accept(*this);
lbessard@16:     s4o.print(" && !");
lbessard@16:     symbol->r_exp->accept(*this);
lbessard@16:     s4o.print(") || (!");
lbessard@16:     symbol->l_exp->accept(*this);
lbessard@16:     s4o.print(" && ");
lbessard@16:     symbol->r_exp->accept(*this);
lbessard@16:     s4o.print(")");
lbessard@16:   }
lbessard@16:   if (search_expression_type->is_numeric_compatible(left_type) && search_expression_type->is_numeric_compatible(right_type)) {
lbessard@16:     return print_binary_expression(symbol->l_exp, symbol->r_exp, " ^ ");
lbessard@16:   }
lbessard@16:   ERROR;
lbessard@16:   return NULL;
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(and_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (typeid(*left_type) == typeid(bool_type_name_c) && typeid(*right_type) == typeid(bool_type_name_c)) {
lbessard@16:     return print_binary_expression(symbol->l_exp, symbol->r_exp, " && ");
lbessard@16:   }
lbessard@16:   if (search_expression_type->is_numeric_compatible(left_type) && search_expression_type->is_numeric_compatible(right_type)) {
lbessard@16:     return print_binary_expression(symbol->l_exp, symbol->r_exp, " & ");
lbessard@16:   }
lbessard@16:   ERROR;
lbessard@16:   return NULL;
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(equ_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", "==", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " == ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(notequ_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", "!=", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " != ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(lt_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", "<", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " < ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(gt_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", ">", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " > ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(le_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", "<=", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " <= ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(ge_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_compare_function("__compare_timespec", ">=", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " >= ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(add_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16: 	symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16: 	if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16: 		return print_binary_function("__add_timespec", symbol->l_exp, symbol->r_exp);
lbessard@16: 	}
lbessard@16: 	return print_binary_expression(symbol->l_exp, symbol->r_exp, " + ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(sub_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_binary_function("__sub_timespec", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " - ");
lbessard@16: }
lbessard@16: 
lbessard@16: void *visit(mul_expression_c *symbol) {
lbessard@16:   symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
lbessard@16:   symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
lbessard@16:   if (search_expression_type->is_time_compatible(left_type) && search_expression_type->is_time_compatible(right_type)) {
lbessard@16:     return print_binary_function("__mul_timespec", symbol->l_exp, symbol->r_exp);
lbessard@16:   }
lbessard@16:   return print_binary_expression(symbol->l_exp, symbol->r_exp, " * ");
lbessard@16: }
lbessard@16: 
etisserant@0: void *visit(div_expression_c *symbol) {return print_binary_expression(symbol->l_exp, symbol->r_exp, " / ");}
etisserant@0: void *visit(mod_expression_c *symbol) {
etisserant@0:   s4o.print("((");
etisserant@0:   symbol->r_exp->accept(*this);
etisserant@0:   s4o.print(" == 0)?0:");
etisserant@0:   print_binary_expression(symbol->l_exp, symbol->r_exp, " % ");
etisserant@0:   s4o.print(")");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: /* TODO: power expression... */
etisserant@0: void *visit(power_expression_c *symbol) {ERROR; return print_binary_expression(symbol->l_exp, symbol->r_exp, " ** ");}
etisserant@0: void *visit(neg_expression_c *symbol) {return print_unary_expression(symbol->exp, " -");}
etisserant@0: void *visit(not_expression_c *symbol) {return print_unary_expression(symbol->exp, "!");}
etisserant@0: 
etisserant@0: void *visit(function_invocation_c *symbol) {
etisserant@0:   function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
etisserant@0: 
etisserant@0:   if (f_decl == function_symtable.end_value())
etisserant@0:     /* should never occur. The function being called MUST be in the symtable... */
etisserant@0:     ERROR;
etisserant@0: 
etisserant@0:   symbol->function_name->accept(*this);
etisserant@0:   s4o.print("(");
etisserant@0: 
etisserant@0:   /* loop through each function parameter, find the value we should pass
etisserant@0:    * to it, and then output the c equivalent...
etisserant@0:    */
etisserant@0: 
etisserant@0:   function_param_iterator_c fp_iterator(f_decl);
etisserant@0:   identifier_c *param_name;
etisserant@0:   function_call_param_iterator_c function_call_param_iterator(symbol);
etisserant@0:   for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
etisserant@0:     if (i != 1)
etisserant@0:       s4o.print(", ");
etisserant@0: 
etisserant@0:     symbol_c *param_type = fp_iterator.param_type();
etisserant@0:     if (param_type == NULL) ERROR;
etisserant@0: 
etisserant@0:     function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_name> = <param_value>) style call */
etisserant@0:     symbol_c *param_value = function_call_param_iterator.search(param_name);
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_value>) style call */
etisserant@0:     if (param_value == NULL)
etisserant@0:       param_value = function_call_param_iterator.next();
etisserant@0: 
etisserant@0:     switch (param_direction) {
etisserant@0:       case function_param_iterator_c::direction_in:
etisserant@0:         if (param_value == NULL) {
etisserant@0:           /* No value given for parameter, so we must use the default... */
etisserant@0:           /* First check whether default value specified in function declaration...*/
etisserant@0:           param_value = fp_iterator.default_value();
etisserant@0:         }
etisserant@0:         if (param_value == NULL) {
etisserant@0:           /* If not, get the default value of this variable's type */
etisserant@0:           param_value = (symbol_c *)param_type->accept(*type_initial_value_c::instance());
etisserant@0:         }
etisserant@0:         if (param_value == NULL) ERROR;
etisserant@0:         param_value->accept(*this);
etisserant@0: 	break;
etisserant@0:       case function_param_iterator_c::direction_out:
etisserant@0:       case function_param_iterator_c::direction_inout:
etisserant@0:         if (param_value == NULL) {
etisserant@0: 	  /* no parameter value given, so we pass a previously declared temporary variable. */
etisserant@0:           std::string *temp_var_name = temp_var_name_factory.new_name();
etisserant@0:           s4o.print(*temp_var_name);
etisserant@0:           delete temp_var_name;
etisserant@0: 	} else {
etisserant@0:           param_value->accept(*this);
etisserant@0: 	}
etisserant@0: 	break;
etisserant@0:       case function_param_iterator_c::direction_extref:
etisserant@0:         /* TODO! */
etisserant@0:         ERROR;
etisserant@0:         break;
etisserant@0:     } /* switch */
etisserant@0:   } /* for(...) */
etisserant@0: 
etisserant@0:   // symbol->parameter_assignment->accept(*this);
etisserant@0:   s4o.print(")");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: /********************/
etisserant@0: /* B 3.2 Statements */
etisserant@0: /********************/
etisserant@0: void *visit(statement_list_c *symbol) {
etisserant@0:   return print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
etisserant@0: }
etisserant@0: 
etisserant@0: /*********************************/
etisserant@0: /* B 3.2.1 Assignment Statements */
etisserant@0: /*********************************/
etisserant@0: void *visit(assignment_statement_c *symbol) {
etisserant@0:   symbol->l_exp->accept(*this);
etisserant@0:   s4o.print(" = ");
etisserant@0:   symbol->r_exp->accept(*this);
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: /*****************************************/
etisserant@0: /* B 3.2.2 Subprogram Control Statements */
etisserant@0: /*****************************************/
etisserant@0: 
etisserant@0: /* fb_name '(' [param_assignment_list] ')' */
etisserant@0: /* param_assignment_list -> may be NULL ! */
etisserant@0: //SYM_REF2(fb_invocation_c, fb_name, param_assignment_list)
etisserant@0: void *visit(fb_invocation_c *symbol) {
etisserant@0:   TRACE("fb_invocation_c");
etisserant@0:   /* first figure out what is the name of the function block type of the function block being called... */
etisserant@0:   symbol_c *function_block_type_name = this->search_fb_instance_decl->get_type_name(symbol->fb_name);
etisserant@0:     /* should never occur. The function block instance MUST have been declared... */
etisserant@0:   if (function_block_type_name == NULL) ERROR;
etisserant@0: 
etisserant@0:   /* Now find the declaration of the function block type being called... */
etisserant@0:   function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(function_block_type_name);
etisserant@0:     /* should never occur. The function block type being called MUST be in the symtable... */
etisserant@0:   if (fb_decl == function_block_type_symtable.end_value()) ERROR;
etisserant@0: 
etisserant@0:   /* loop through each function block parameter, find the value we should pass
etisserant@0:    * to it, and then output the c equivalent...
etisserant@0:    */
etisserant@0:   function_param_iterator_c fp_iterator(fb_decl);
etisserant@0:   identifier_c *param_name;
etisserant@0:   function_call_param_iterator_c function_call_param_iterator(symbol);
etisserant@0:   for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
etisserant@0:     function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_name> = <param_value>) style call */
etisserant@0:     symbol_c *param_value = function_call_param_iterator.search(param_name);
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_value>) style call */
etisserant@0:     if (param_value == NULL)
etisserant@0:       param_value = function_call_param_iterator.next();
etisserant@0: 
etisserant@0:     /* now output the value assignment */
etisserant@0:     if (param_value != NULL)
etisserant@0:       if ((param_direction == function_param_iterator_c::direction_in) ||
etisserant@0:           (param_direction == function_param_iterator_c::direction_inout)) {
etisserant@0:         symbol->fb_name->accept(*this);
etisserant@0:         s4o.print(".");
etisserant@0:         param_name->accept(*this);
etisserant@0:         s4o.print(" = ");
etisserant@0:         param_value->accept(*this);
etisserant@0:         s4o.print(";\n" + s4o.indent_spaces);
etisserant@0:       }
etisserant@0:   } /* for(...) */
etisserant@0: 
etisserant@0:   /* now call the function... */
etisserant@0:   function_block_type_name->accept(*this);
etisserant@0:   s4o.print(FB_FUNCTION_SUFFIX);
etisserant@0:   s4o.print("(&");
etisserant@0:   symbol->fb_name->accept(*this);
etisserant@0:   s4o.print(")");
etisserant@0: 
etisserant@0:   /* loop through each function parameter, find the variable to which
etisserant@0:    * we should atribute the value of all output or inoutput parameters.
etisserant@0:    */
etisserant@0:   fp_iterator.reset();
etisserant@0:   function_call_param_iterator.reset();
etisserant@0:   for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
etisserant@0:     function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_name> = <param_value>) style call */
etisserant@0:     symbol_c *param_value = function_call_param_iterator.search(param_name);
etisserant@0: 
etisserant@0:     /* Get the value from a foo(<param_value>) style call */
etisserant@0:     if (param_value == NULL)
etisserant@0:       param_value = function_call_param_iterator.next();
etisserant@0: 
etisserant@0:     /* now output the value assignment */
etisserant@0:     if (param_value != NULL)
etisserant@0:       if ((param_direction == function_param_iterator_c::direction_out) ||
etisserant@0:           (param_direction == function_param_iterator_c::direction_inout)) {
etisserant@0:         s4o.print(";\n"+ s4o.indent_spaces);
etisserant@0:         param_value->accept(*this);
etisserant@0:         s4o.print(" = ");
etisserant@0:         symbol->fb_name->accept(*this);
etisserant@0:         s4o.print(".");
etisserant@0:         param_name->accept(*this);
etisserant@0:       }
etisserant@0:   } /* for(...) */
etisserant@0: 
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: /* helper symbol for fb_invocation */
etisserant@0: /* param_assignment_list ',' param_assignment */
etisserant@0: void *visit(param_assignment_list_c *symbol) {
etisserant@0:   TRACE("param_assignment_list_c");
etisserant@0:   /* this should never be called... */
etisserant@0:   ERROR;
etisserant@0:   return NULL;
etisserant@0: //  return print_list(symbol, "", ", ");
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: void *visit(input_variable_param_assignment_c *symbol) {
etisserant@0:   TRACE("input_variable_param_assignment_c");
etisserant@0:   /* this should never be called... */
etisserant@0:   ERROR;
etisserant@0:   return NULL;
etisserant@0: /*
etisserant@0:   symbol->variable_name->accept(*this);
etisserant@0:   s4o.print(" = ");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   return NULL;
etisserant@0: */
etisserant@0: }
etisserant@0: 
etisserant@0: void *visit(output_variable_param_assignment_c *symbol) {
etisserant@0:   TRACE("output_variable_param_assignment_c");
etisserant@0:   /* this should never be called... */
etisserant@0:   ERROR;
etisserant@0:   return NULL;
etisserant@0: /*
etisserant@0:   s4o.print(s4o.indent_spaces);
etisserant@0:   if (symbol->not_param != NULL)
etisserant@0:     symbol->not_param->accept(*this);
etisserant@0:   symbol->variable_name->accept(*this);
etisserant@0:   s4o.print(" => ");
etisserant@0:   symbol->variable->accept(*this);
etisserant@0:   return NULL;
etisserant@0: */
etisserant@0: }
etisserant@0: 
etisserant@0: // TODO: the NOT symbol in function (block) calls...
etisserant@0: void *visit(not_paramassign_c *symbol) {
etisserant@0:   TRACE("not_paramassign_c");
etisserant@0:   /* this should never be called... */
etisserant@0:   ERROR;
etisserant@0:   return NULL;
etisserant@0: /*
etisserant@0:   s4o.print("NOT ");
etisserant@0:   return NULL;
etisserant@0: */
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: /********************************/
etisserant@0: /* B 3.2.3 Selection Statements */
etisserant@0: /********************************/
etisserant@0: void *visit(if_statement_c *symbol) {
etisserant@0:   s4o.print("if (");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   s4o.print(") {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.indent_left();
etisserant@0:   symbol->elseif_statement_list->accept(*this);
etisserant@0: 
etisserant@0:   if (symbol->else_statement_list != NULL) {
etisserant@0:     s4o.print(s4o.indent_spaces); s4o.print("} else {\n");
etisserant@0:     s4o.indent_right();
etisserant@0:     symbol->else_statement_list->accept(*this);
etisserant@0:     s4o.indent_left();
etisserant@0:   }
etisserant@0:   s4o.print(s4o.indent_spaces); s4o.print("}");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: /* helper symbol for if_statement */
etisserant@0: void *visit(elseif_statement_list_c *symbol) {return print_list(symbol);}
etisserant@0: 
etisserant@0: /* helper symbol for elseif_statement_list */
etisserant@0: void *visit(elseif_statement_c *symbol) {
etisserant@0:   s4o.print(s4o.indent_spaces); s4o.print("} else if (");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   s4o.print(") {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.indent_left();
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: void *visit(case_statement_c *symbol) {
etisserant@0:   s4o.print("switch(");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   s4o.print(") {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->case_element_list->accept(*this);
etisserant@0:   if (symbol->statement_list != NULL) {
etisserant@0:     s4o.print(s4o.indent_spaces + "default:\n");
etisserant@0:     s4o.indent_right();
etisserant@0:     symbol->statement_list->accept(*this);
etisserant@0:     s4o.print(s4o.indent_spaces + "break;\n");
etisserant@0:     s4o.indent_left();
etisserant@0:   }
etisserant@0:   s4o.indent_left();
etisserant@0:   s4o.print(s4o.indent_spaces + "}");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: /* helper symbol for case_statement */
etisserant@0: void *visit(case_element_list_c *symbol) {return print_list(symbol);}
etisserant@0: 
etisserant@0: void *visit(case_element_c *symbol) {
etisserant@0:   s4o.print(s4o.indent_spaces + "case ");
etisserant@0:   symbol->case_list->accept(*this);
etisserant@0:   s4o.print(" :\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.print(s4o.indent_spaces + "break;\n");
etisserant@0:   s4o.indent_left();
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: void *visit(case_list_c *symbol) {return print_list(symbol, "", ", ");}
etisserant@0: 
etisserant@0: /********************************/
etisserant@0: /* B 3.2.4 Iteration Statements */
etisserant@0: /********************************/
etisserant@0: void *visit(for_statement_c *symbol) {
etisserant@0:   s4o.print("for(");
etisserant@0:   symbol->control_variable->accept(*this);
etisserant@0:   s4o.print(" = ");
etisserant@0:   symbol->beg_expression->accept(*this);
etisserant@0:   s4o.print("; ");
etisserant@0:   symbol->control_variable->accept(*this);
etisserant@0:   s4o.print(" != ");
etisserant@0:   symbol->end_expression->accept(*this);
etisserant@0:   s4o.print("; ");
etisserant@0:   symbol->control_variable->accept(*this);
etisserant@0:   if (symbol->by_expression != NULL) {
etisserant@0:     s4o.print(" += ");
etisserant@0:     symbol->by_expression->accept(*this);
etisserant@0:   } else {
etisserant@0:     s4o.print("++");
etisserant@0:   }
etisserant@0:   s4o.print(") {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.indent_left();
etisserant@0:   s4o.print(s4o.indent_spaces); s4o.print("}");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: void *visit(while_statement_c *symbol) {
etisserant@0:   s4o.print("while (");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   s4o.print(") {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.indent_left();
etisserant@0:   s4o.print(s4o.indent_spaces); s4o.print("}");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: void *visit(repeat_statement_c *symbol) {
etisserant@0:   s4o.print("do {\n");
etisserant@0:   s4o.indent_right();
etisserant@0:   symbol->statement_list->accept(*this);
etisserant@0:   s4o.indent_left();
etisserant@0:   s4o.print(s4o.indent_spaces); s4o.print("} while(");
etisserant@0:   symbol->expression->accept(*this);
etisserant@0:   s4o.print(")");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: void *visit(exit_statement_c *symbol) {
etisserant@0:   s4o.print("exit(0)");
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: }; /* generate_cc_st_c */
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: