--- a/stage4/generate_cc/generate_cc_st.cc Tue Oct 23 10:35:58 2007 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,847 +0,0 @@
-/*
- * (c) 2003 Mario de Sousa
- *
- * Offered to the public under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * This code is made available on the understanding that it will not be
- * used in safety-critical situations without a full and competent review.
- */
-
-/*
- * An IEC 61131-3 IL and ST compiler.
- *
- * Based on the
- * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
- *
- */
-
-
-/*
- * Conversion of st statements (i.e. ST code).
- *
- * This is part of the 4th stage that generates
- * a c++ source program equivalent to the IL and ST
- * code.
- */
-
-
-/***********************************************************************/
-/***********************************************************************/
-/***********************************************************************/
-/***********************************************************************/
-
-
-class generate_cc_st_c: public generate_cc_typedecl_c {
-
- private:
- /* When calling a function block, we must first find it's type,
- * by searching through the declarations of the variables currently
- * in scope.
- * This class does just that...
- * A new class is instantiated whenever we begin generating the code
- * for a function block type declaration, or a program declaration.
- * This object instance will then later be called while the
- * function block's or the program's body is being handled.
- *
- * Note that functions cannot contain calls to function blocks,
- * so we do not create an object instance when handling
- * a function declaration.
- */
- search_fb_instance_decl_c *search_fb_instance_decl;
-
- /* When compiling st code, it becomes necessary to determine the
- * data type of st expressions. To do this, we must first find the
- * st operand's declaration, within the scope of the function block
- * or function currently being processed.
- * The following object does just that...
- * This object instance will then later be called while the
- * remaining st code is being handled.
- */
- search_expression_type_c *search_expression_type;
-
- search_varfb_instance_type_c *search_varfb_instance_type;
-
- public:
- generate_cc_st_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL)
- : generate_cc_typedecl_c(s4o_ptr) {
- search_fb_instance_decl = new search_fb_instance_decl_c(scope);
- search_expression_type = new search_expression_type_c(scope);
- search_varfb_instance_type = new search_varfb_instance_type_c(scope);
- this->set_variable_prefix(variable_prefix);
- }
-
- virtual ~generate_cc_st_c(void) {
- delete search_fb_instance_decl;
- delete search_expression_type;
- delete search_varfb_instance_type;
- }
-
-
- private:
- /* Some function calls in the body of functions or function blocks
- * may leave some parameters to their default values, and
- * ignore some output parameters of the function being called.
- * Our conversion of ST functions to C++ does not contemplate that,
- * i.e. each called function must get all it's input and output
- * parameters set correctly.
- * For input parameters we merely need to call the function with
- * the apropriate default value, but for output parameters
- * we must create temporary variables to hold the output value.
- *
- * We declare all the temporary output variables at the begining of
- * the body of each function or function block, and use them as
- * in function calls later on as they become necessary...
- * Note that we cannot create these variables just before a function
- * call, as the function call itself may be integrated within an
- * expression, or another function call!
- *
- * The variables are declared in the exact same order in which they
- * will be used later on during the function calls, which allows us
- * to simply re-create the name that was used for the temporary variable
- * instead of keeping it in some list.
- * The names are recreated by the temp_var_name_factory, after reset()
- * has been called!
- *
- * This function will genertae code similar to...
- *
- * INT __TMP_0 = 23;
- * REAL __TMP_1 = 45.5;
- * ...
- */
- temp_var_name_c temp_var_name_factory;
-
- public:
- void generate(statement_list_c *stl) {
- generate_cc_tempvardecl_c generate_cc_tempvardecl(&s4o);
- generate_cc_tempvardecl.generate(stl, &temp_var_name_factory);
- stl->accept(*this);
- }
-
- private:
-
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-void *visit(symbolic_variable_c *symbol) {
- unsigned int vartype = search_varfb_instance_type->get_vartype(symbol);
- if (vartype == search_var_instance_decl_c::external_vt || vartype == search_var_instance_decl_c::located_vt) {
- s4o.print("*(");
- generate_cc_base_c::visit(symbol);
- s4o.print(")");
- }
- else {
- generate_cc_base_c::visit(symbol);
- }
- return NULL;
-}
-
-/********************************************/
-/* B.1.4.1 Directly Represented Variables */
-/********************************************/
-// direct_variable: direct_variable_token {$$ = new direct_variable_c($1);};
-void *visit(direct_variable_c *symbol) {
- TRACE("direct_variable_c");
- /* Do not use print_token() as it will change everything into uppercase */
- if (strlen(symbol->value) == 0) ERROR;
- s4o.print("*(");
- this->print_variable_prefix();
- s4o.printlocation(symbol->value + 1);
- s4o.print(")");
- return NULL;
-}
-
-/***************************************/
-/* B.3 - Language ST (Structured Text) */
-/***************************************/
-/***********************/
-/* B 3.1 - Expressions */
-/***********************/
-void *visit(or_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_bool_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " || ");
- if (search_expression_type->is_binary_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " | ");
- ERROR;
- return NULL;
-}
-
-void *visit(xor_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_bool_type(left_type)) {
- s4o.print("(");
- symbol->l_exp->accept(*this);
- s4o.print(" && !");
- symbol->r_exp->accept(*this);
- s4o.print(") || (!");
- symbol->l_exp->accept(*this);
- s4o.print(" && ");
- symbol->r_exp->accept(*this);
- s4o.print(")");
- }
- if (search_expression_type->is_binary_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " ^ ");
- ERROR;
- return NULL;
-}
-
-void *visit(and_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_bool_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " && ");
- if (search_expression_type->is_binary_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " & ");
- ERROR;
- return NULL;
-}
-
-void *visit(equ_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__eq_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " == ");
-}
-
-void *visit(notequ_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__ne_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " != ");
-}
-
-void *visit(lt_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__lt_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " < ");
-}
-
-void *visit(gt_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__gt_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " > ");
-}
-
-void *visit(le_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__le_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " <= ");
-}
-
-void *visit(ge_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_time_type(left_type))
- return print_compare_function("__ge_", left_type, symbol->l_exp, symbol->r_exp);
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " >= ");
-}
-
-void *visit(add_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if ((typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
- (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
- (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)))
- return print_binary_function("__time_add", symbol->l_exp, symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " + ");
- ERROR;
- return NULL;
-}
-
-void *visit(sub_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if ((typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
- (typeid(*left_type) == typeid(date_type_name_c) && typeid(*right_type) == typeid(date_type_name_c)) ||
- (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
- (typeid(*left_type) == typeid(tod_type_name_c) && typeid(*right_type) == typeid(tod_type_name_c)) ||
- (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) ||
- (typeid(*left_type) == typeid(dt_type_name_c) && typeid(*right_type) == typeid(dt_type_name_c)))
- return print_binary_function("__time_sub", symbol->l_exp, symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " - ");
- ERROR;
- return NULL;
-}
-
-void *visit(mul_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if ((typeid(*left_type) == typeid(time_type_name_c) && search_expression_type->is_integer_type(right_type)) ||
- (typeid(*left_type) == typeid(time_type_name_c) && search_expression_type->is_real_type(right_type)))
- return print_binary_function("__time_mul", symbol->l_exp, symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " * ");
- ERROR;
- return NULL;
-}
-
-void *visit(div_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type))
- return print_binary_expression(symbol->l_exp, symbol->r_exp, " / ");
- ERROR;
- return NULL;
-}
-
-void *visit(mod_expression_c *symbol) {
- symbol_c *left_type = search_expression_type->get_type(symbol->l_exp);
- symbol_c *right_type = search_expression_type->get_type(symbol->r_exp);
- if (!search_expression_type->is_same_type(left_type, right_type))
- ERROR;
- if (search_expression_type->is_integer_type(left_type) || search_expression_type->is_real_type(left_type)) {
- s4o.print("((");
- symbol->r_exp->accept(*this);
- s4o.print(" == 0)?0:");
- print_binary_expression(symbol->l_exp, symbol->r_exp, " % ");
- s4o.print(")");
- return NULL;
- }
- ERROR;
- return NULL;
-}
-
-/* TODO: power expression... */
-void *visit(power_expression_c *symbol) {ERROR; return print_binary_expression(symbol->l_exp, symbol->r_exp, " ** ");}
-void *visit(neg_expression_c *symbol) {return print_unary_expression(symbol->exp, " -");}
-
-void *visit(not_expression_c *symbol) {
- symbol_c *exp_type = search_expression_type->get_type(symbol->exp);
- if (!search_expression_type->is_binary_type(exp_type))
- ERROR;
- return print_unary_expression(symbol->exp, search_expression_type->is_bool_type(exp_type)?"!":"~");
-}
-
-void *visit(function_invocation_c *symbol) {
- function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name);
-
- if (f_decl == function_symtable.end_value()) {
- /* The function called is not in the symtable, so we test if it is a
- * standard function defined in standard */
-
- function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name);
- if (current_function_type == function_none) ERROR;
-
- symbol_c *function_return_type = search_expression_type->get_type(symbol);
-
- function_call_param_iterator_c function_call_param_iterator(symbol);
-
- int nb_param = ((list_c *)symbol->parameter_assignment_list)->n;
-
-#include "st_code_gen.c"
-
-#if 0
- for(int current_param = 0; current_param < nb_param; current_param++) {
- symbol_c *param_name = NULL;
- switch (current_function_type) {
- case function_add:
- case function_and:
- case function_or:
- param_name = generate_param_name("IN%d", current_param + 1);
- break;
- case function_sub:
- if (current_param < 2)
- param_name = generate_param_name("IN%d", current_param + 1);
- else
- ERROR;
- break;
- default: ERROR;
- }
-
- /* Get the value from a foo(<param_name> = <param_value>) style call */
- symbol_c *param_value = function_call_param_iterator.search(param_name);
- delete param_name;
-
- /* Get the value from a foo(<param_value>) style call */
- if (param_value == NULL)
- param_value = function_call_param_iterator.next();
-
- if (param_value == NULL) ERROR;
-
- switch (current_function_type) {
- case function_add:
- if (search_expression_type->is_time_type(function_return_type)) {
- if (current_param == 0) {
- s4o.print("__time_add(");
- param_value->accept(*this);
- }
- else if (current_param == 1) {
- s4o.print(", ");
- param_value->accept(*this);
- s4o.print(")");
- }
- else ERROR;
- }
- else {
- if (current_param == 0)
- s4o.print("(");
- else
- s4o.print(" + ");
- param_value->accept(*this);
- if (current_param == nb_param - 1)
- s4o.print(")");
- }
- break;
- case function_sub:
- if (search_expression_type->is_time_type(function_return_type)) {
- if (current_param == 0) {
- s4o.print("__time_sub(");
- param_value->accept(*this);
- }
- else if (current_param == 1) {
- s4o.print(", ");
- param_value->accept(*this);
- s4o.print(")");
- }
- else ERROR;
- }
- else {
- if (current_param == 0) {
- s4o.print("(");
- param_value->accept(*this);
- }
- else if (current_param == 1) {
- s4o.print(" - ");
- param_value->accept(*this);
- s4o.print(")");
- }
- else ERROR;
- }
- break;
- case function_and:
- if (current_param == 0)
- s4o.print("(");
- else
- if (search_expression_type->is_bool_type(function_return_type))
- s4o.print(" && ");
- else
- s4o.print(" & ");
- param_value->accept(*this);
- if (current_param == nb_param - 1)
- s4o.print(")");
- break;
- case function_or:
- if (current_param == 0)
- s4o.print("(");
- else
- if (search_expression_type->is_bool_type(function_return_type))
- s4o.print(" || ");
- else
- s4o.print(" | ");
- param_value->accept(*this);
- if (current_param == nb_param - 1)
- s4o.print(")");
- break;
- default: ERROR;
- }
- } /* for(...) */
-#endif
- }
- else {
- /* loop through each function parameter, find the value we should pass
- * to it, and then output the c equivalent...
- */
- function_param_iterator_c fp_iterator(f_decl);
-
- symbol->function_name->accept(*this);
- s4o.print("(");
- s4o.indent_right();
-
- identifier_c *param_name;
- function_call_param_iterator_c function_call_param_iterator(symbol);
- for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
- if (i != 1)
- s4o.print(",\n"+s4o.indent_spaces);
-
- function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-
- /* Get the value from a foo(<param_name> = <param_value>) style call */
- symbol_c *param_value = function_call_param_iterator.search(param_name);
-
- /* Get the value from a foo(<param_value>) style call */
- if (param_value == NULL)
- param_value = function_call_param_iterator.next();
-
- symbol_c *param_type = fp_iterator.param_type();
- if (param_type == NULL) ERROR;
-
- switch (param_direction) {
- case function_param_iterator_c::direction_in:
- if (param_value == NULL) {
- /* No value given for parameter, so we must use the default... */
- /* First check whether default value specified in function declaration...*/
- param_value = fp_iterator.default_value();
- }
- if (param_value == NULL) {
- /* If not, get the default value of this variable's type */
- param_value = (symbol_c *)param_type->accept(*type_initial_value_c::instance());
- }
- if (param_value == NULL) ERROR;
- param_value->accept(*this);
- break;
- case function_param_iterator_c::direction_out:
- case function_param_iterator_c::direction_inout:
- if (param_value == NULL) {
- /* no parameter value given, so we pass a previously declared temporary variable. */
- std::string *temp_var_name = temp_var_name_factory.new_name();
- s4o.print(*temp_var_name);
- delete temp_var_name;
- } else {
- param_value->accept(*this);
- }
- break;
- case function_param_iterator_c::direction_extref:
- /* TODO! */
- ERROR;
- break;
- } /* switch */
- } /* for(...) */
- // symbol->parameter_assignment->accept(*this);
- s4o.print(")");
- s4o.indent_left();
- }
-
- return NULL;
-}
-
-/********************/
-/* B 3.2 Statements */
-/********************/
-void *visit(statement_list_c *symbol) {
- return print_list(symbol, s4o.indent_spaces, ";\n" + s4o.indent_spaces, ";\n");
-}
-
-/*********************************/
-/* B 3.2.1 Assignment Statements */
-/*********************************/
-void *visit(assignment_statement_c *symbol) {
- symbol->l_exp->accept(*this);
- s4o.print(" = ");
- symbol->r_exp->accept(*this);
- return NULL;
-}
-
-/*****************************************/
-/* B 3.2.2 Subprogram Control Statements */
-/*****************************************/
-
-/* fb_name '(' [param_assignment_list] ')' */
-/* param_assignment_list -> may be NULL ! */
-//SYM_REF2(fb_invocation_c, fb_name, param_assignment_list)
-void *visit(fb_invocation_c *symbol) {
- TRACE("fb_invocation_c");
- /* first figure out what is the name of the function block type of the function block being called... */
- symbol_c *function_block_type_name = this->search_fb_instance_decl->get_type_name(symbol->fb_name);
- /* should never occur. The function block instance MUST have been declared... */
- if (function_block_type_name == NULL) ERROR;
-
- /* Now find the declaration of the function block type being called... */
- function_block_declaration_c *fb_decl = function_block_type_symtable.find_value(function_block_type_name);
- /* should never occur. The function block type being called MUST be in the symtable... */
- if (fb_decl == function_block_type_symtable.end_value()) ERROR;
-
- /* loop through each function block parameter, find the value we should pass
- * to it, and then output the c equivalent...
- */
- function_param_iterator_c fp_iterator(fb_decl);
- identifier_c *param_name;
- function_call_param_iterator_c function_call_param_iterator(symbol);
- for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
- function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-
- /* Get the value from a foo(<param_name> = <param_value>) style call */
- symbol_c *param_value = function_call_param_iterator.search(param_name);
-
- /* Get the value from a foo(<param_value>) style call */
- if (param_value == NULL)
- param_value = function_call_param_iterator.next();
-
- /* now output the value assignment */
- if (param_value != NULL)
- if ((param_direction == function_param_iterator_c::direction_in) ||
- (param_direction == function_param_iterator_c::direction_inout)) {
- print_variable_prefix();
- symbol->fb_name->accept(*this);
- s4o.print(".");
- param_name->accept(*this);
- s4o.print(" = ");
- param_value->accept(*this);
- s4o.print(";\n" + s4o.indent_spaces);
- }
- } /* for(...) */
-
- /* now call the function... */
- function_block_type_name->accept(*this);
- s4o.print(FB_FUNCTION_SUFFIX);
- s4o.print("(&");
- print_variable_prefix();
- symbol->fb_name->accept(*this);
- s4o.print(")");
-
- /* loop through each function parameter, find the variable to which
- * we should atribute the value of all output or inoutput parameters.
- */
- fp_iterator.reset();
- function_call_param_iterator.reset();
- for(int i = 1; (param_name = fp_iterator.next()) != NULL; i++) {
- function_param_iterator_c::param_direction_t param_direction = fp_iterator.param_direction();
-
- /* Get the value from a foo(<param_name> = <param_value>) style call */
- symbol_c *param_value = function_call_param_iterator.search(param_name);
-
- /* Get the value from a foo(<param_value>) style call */
- if (param_value == NULL)
- param_value = function_call_param_iterator.next();
-
- /* now output the value assignment */
- if (param_value != NULL)
- if ((param_direction == function_param_iterator_c::direction_out) ||
- (param_direction == function_param_iterator_c::direction_inout)) {
- s4o.print(";\n"+ s4o.indent_spaces);
- param_value->accept(*this);
- s4o.print(" = ");
- print_variable_prefix();
- symbol->fb_name->accept(*this);
- s4o.print(".");
- param_name->accept(*this);
- }
- } /* for(...) */
-
- return NULL;
-}
-
-
-
-
-/* helper symbol for fb_invocation */
-/* param_assignment_list ',' param_assignment */
-void *visit(param_assignment_list_c *symbol) {
- TRACE("param_assignment_list_c");
- /* this should never be called... */
- ERROR;
- return NULL;
-// return print_list(symbol, "", ", ");
-}
-
-
-void *visit(input_variable_param_assignment_c *symbol) {
- TRACE("input_variable_param_assignment_c");
- /* this should never be called... */
- ERROR;
- return NULL;
-/*
- symbol->variable_name->accept(*this);
- s4o.print(" = ");
- symbol->expression->accept(*this);
- return NULL;
-*/
-}
-
-void *visit(output_variable_param_assignment_c *symbol) {
- TRACE("output_variable_param_assignment_c");
- /* this should never be called... */
- ERROR;
- return NULL;
-/*
- s4o.print(s4o.indent_spaces);
- if (symbol->not_param != NULL)
- symbol->not_param->accept(*this);
- symbol->variable_name->accept(*this);
- s4o.print(" => ");
- symbol->variable->accept(*this);
- return NULL;
-*/
-}
-
-// TODO: the NOT symbol in function (block) calls...
-void *visit(not_paramassign_c *symbol) {
- TRACE("not_paramassign_c");
- /* this should never be called... */
- ERROR;
- return NULL;
-/*
- s4o.print("NOT ");
- return NULL;
-*/
-}
-
-
-/********************************/
-/* B 3.2.3 Selection Statements */
-/********************************/
-void *visit(if_statement_c *symbol) {
- s4o.print("if (");
- symbol->expression->accept(*this);
- s4o.print(") {\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.indent_left();
- symbol->elseif_statement_list->accept(*this);
-
- if (symbol->else_statement_list != NULL) {
- s4o.print(s4o.indent_spaces); s4o.print("} else {\n");
- s4o.indent_right();
- symbol->else_statement_list->accept(*this);
- s4o.indent_left();
- }
- s4o.print(s4o.indent_spaces); s4o.print("}");
- return NULL;
-}
-
-/* helper symbol for if_statement */
-void *visit(elseif_statement_list_c *symbol) {return print_list(symbol);}
-
-/* helper symbol for elseif_statement_list */
-void *visit(elseif_statement_c *symbol) {
- s4o.print(s4o.indent_spaces); s4o.print("} else if (");
- symbol->expression->accept(*this);
- s4o.print(") {\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.indent_left();
- return NULL;
-}
-
-void *visit(case_statement_c *symbol) {
- s4o.print("switch(");
- symbol->expression->accept(*this);
- s4o.print(") {\n");
- s4o.indent_right();
- symbol->case_element_list->accept(*this);
- if (symbol->statement_list != NULL) {
- s4o.print(s4o.indent_spaces + "default:\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.print(s4o.indent_spaces + "break;\n");
- s4o.indent_left();
- }
- s4o.indent_left();
- s4o.print(s4o.indent_spaces + "}");
- return NULL;
-}
-
-/* helper symbol for case_statement */
-void *visit(case_element_list_c *symbol) {return print_list(symbol);}
-
-void *visit(case_element_c *symbol) {
- s4o.print(s4o.indent_spaces + "case ");
- symbol->case_list->accept(*this);
- s4o.print(" :\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.print(s4o.indent_spaces + "break;\n");
- s4o.indent_left();
- return NULL;
-}
-
-void *visit(case_list_c *symbol) {return print_list(symbol, "", ", ");}
-
-/********************************/
-/* B 3.2.4 Iteration Statements */
-/********************************/
-void *visit(for_statement_c *symbol) {
- s4o.print("for(");
- symbol->control_variable->accept(*this);
- s4o.print(" = ");
- symbol->beg_expression->accept(*this);
- s4o.print("; ");
- symbol->control_variable->accept(*this);
- s4o.print(" != ");
- symbol->end_expression->accept(*this);
- s4o.print("; ");
- symbol->control_variable->accept(*this);
- if (symbol->by_expression != NULL) {
- s4o.print(" += ");
- symbol->by_expression->accept(*this);
- } else {
- s4o.print("++");
- }
- s4o.print(") {\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.indent_left();
- s4o.print(s4o.indent_spaces); s4o.print("}");
- return NULL;
-}
-void *visit(while_statement_c *symbol) {
- s4o.print("while (");
- symbol->expression->accept(*this);
- s4o.print(") {\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.indent_left();
- s4o.print(s4o.indent_spaces); s4o.print("}");
- return NULL;
-}
-void *visit(repeat_statement_c *symbol) {
- s4o.print("do {\n");
- s4o.indent_right();
- symbol->statement_list->accept(*this);
- s4o.indent_left();
- s4o.print(s4o.indent_spaces); s4o.print("} while(");
- symbol->expression->accept(*this);
- s4o.print(")");
- return NULL;
-}
-void *visit(exit_statement_c *symbol) {
- s4o.print("exit(0)");
- return NULL;
-}
-
-
-
-}; /* generate_cc_st_c */
-
-
-
-
-
-
-
-
-