--- a/Makefile Wed Jul 13 13:57:29 2011 +0200
+++ b/Makefile Fri Sep 02 18:15:55 2011 +0200
@@ -53,6 +53,7 @@
LIBS += absyntax_utils/absyntax_utils.o
LIBS += absyntax_utils/search_expression_type.o
LIBS += absyntax_utils/decompose_var_instance_name.o
+LIBS += absyntax_utils/case_element_iterator.o
LIBS += absyntax_utils/function_call_iterator.o
LIBS += absyntax_utils/function_call_param_iterator.o
LIBS += absyntax_utils/function_param_iterator.o
--- a/absyntax_utils/Makefile Wed Jul 13 13:57:29 2011 +0200
+++ b/absyntax_utils/Makefile Fri Sep 02 18:15:55 2011 +0200
@@ -22,6 +22,7 @@
SEARCH_UTIL_FILES = absyntax_utils.o
SEARCH_UTIL_FILES += search_expression_type.o
SEARCH_UTIL_FILES += decompose_var_instance_name.o
+SEARCH_UTIL_FILES += case_element_iterator.o
SEARCH_UTIL_FILES += function_call_iterator.o
SEARCH_UTIL_FILES += function_call_param_iterator.o
SEARCH_UTIL_FILES += function_param_iterator.o
--- a/absyntax_utils/absyntax_utils.hh Wed Jul 13 13:57:29 2011 +0200
+++ b/absyntax_utils/absyntax_utils.hh Fri Sep 02 18:15:55 2011 +0200
@@ -98,6 +98,7 @@
/***********************************************************************/
#include "spec_init_separator.hh"
+#include "case_element_iterator.hh"
#include "function_param_iterator.hh"
#include "function_call_iterator.hh"
#include "function_call_param_iterator.hh"
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/case_element_iterator.cc Fri Sep 02 18:15:55 2011 +0200
@@ -0,0 +1,186 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt)
+ * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * 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 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Case element iterator.
+ * Iterate through the elements of a case list.
+ *
+ * This is part of the 4th stage that generates
+ * a c++ source program equivalent to the IL and ST
+ * code.
+ */
+
+/* Given a case_list_c and a type of element, iterate through
+ * each element, returning the symbol of each element if from
+ * the good type...case_element_iterator_c
+ */
+
+
+
+
+#include "case_element_iterator.hh"
+
+
+//#define DEBUG
+#ifdef DEBUG
+#define TRACE(classname) printf("\n____%s____\n",classname);
+#else
+#define TRACE(classname)
+#endif
+
+
+#define ERROR error_exit(__FILE__,__LINE__)
+/* function defined in main.cc */
+extern void error_exit(const char *file_name, int line_no);
+
+
+void* case_element_iterator_c::handle_case_element(symbol_c *case_element) {
+ if (current_case_element == case_element) {
+ current_case_element = NULL;
+ }
+ else if (current_case_element == NULL) {
+ current_case_element = case_element;
+ return case_element;
+ }
+
+ /* Not found! */
+ return NULL;
+}
+
+void* case_element_iterator_c::iterate_list(list_c *list) {
+ void *res;
+ for (int i = 0; i < list->n; i++) {
+ res = list->elements[i]->accept(*this);
+ if (res != NULL)
+ return res;
+ }
+ return NULL;
+}
+
+/* start off at the first case element once again... */
+void case_element_iterator_c::reset(void) {
+ current_case_element = NULL;
+}
+
+
+/* initialise the iterator object.
+ * We must be given a reference to a case_list_c that will be analysed...
+ */
+case_element_iterator_c::case_element_iterator_c(symbol_c *list, case_element_t element_type) {
+ /* do some consistency check... */
+ case_list_c* case_list = dynamic_cast<case_list_c*>(list);
+
+ if (NULL == case_list) ERROR;
+
+ /* OK. Now initialise this object... */
+ this->case_list = list;
+ this->wanted_element_type = element_type;
+ reset();
+}
+
+
+
+/* Skip to the next case element of type chosen. After object creation,
+ * the object references on case element _before_ the first, so
+ * this function must be called once to get the object to
+ * reference the first element...
+ *
+ * Returns the case element's symbol!
+ */
+symbol_c *case_element_iterator_c::next(void) {
+ void *res = case_list->accept(*this);
+ if (res == NULL)
+ return NULL;
+
+ return current_case_element;
+}
+
+/******************************/
+/* B 1.2.1 - Numeric Literals */
+/******************************/
+void *case_element_iterator_c::visit(integer_c *symbol) {
+ switch (wanted_element_type) {
+ case element_single:
+ return handle_case_element(symbol);
+ break;
+ default:
+ break;
+ }
+ return NULL;
+}
+
+void *case_element_iterator_c::visit(neg_integer_c *symbol) {
+ switch (wanted_element_type) {
+ case element_single:
+ return handle_case_element(symbol);
+ break;
+ default:
+ break;
+ }
+ return NULL;
+}
+
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+/* signed_integer DOTDOT signed_integer */
+void *case_element_iterator_c::visit(subrange_c *symbol) {
+ switch (wanted_element_type) {
+ case element_subrange:
+ return handle_case_element(symbol);
+ break;
+ default:
+ break;
+ }
+ return NULL;
+}
+
+/* enumerated_type_name '#' identifier */
+void *case_element_iterator_c::visit(enumerated_value_c *symbol) {
+ switch (wanted_element_type) {
+ case element_single:
+ return handle_case_element(symbol);
+ break;
+ default:
+ break;
+ }
+ return NULL;
+}
+
+/********************************/
+/* B 3.2.3 Selection Statements */
+/********************************/
+void *case_element_iterator_c::visit(case_list_c *symbol) {
+ return iterate_list(symbol);
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/case_element_iterator.hh Fri Sep 02 18:15:55 2011 +0200
@@ -0,0 +1,127 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt)
+ * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * 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 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Case element iterator.
+ * Iterate through the elements of a case list.
+ *
+ * This is part of the 4th stage that generates
+ * a c++ source program equivalent to the IL and ST
+ * code.
+ */
+
+/* Given a case_list_c and a type of element, iterate through
+ * each element, returning the symbol of each element if from
+ * the good type...case_element_iterator_c
+ */
+
+
+#include "../absyntax/visitor.hh"
+
+
+class case_element_iterator_c : public null_visitor_c {
+ public:
+ /* A type to specify the type of element.
+ */
+ typedef enum {
+ element_single,
+ element_subrange,
+ } case_element_t ;
+
+
+ private:
+ /* a pointer to the function_block_declaration_c
+ * or function_declaration_c currently being analysed.
+ */
+ symbol_c *case_list;
+ /* used when called to iterate() for a parameter */
+ symbol_c *current_case_element;
+
+ /* used to indicate the type of case element on which iterate */
+ case_element_t wanted_element_type;
+
+ private:
+ void* handle_case_element(symbol_c *case_element);
+
+ void* iterate_list(list_c *list);
+
+ public:
+ /* start off at the first case element once again... */
+ void reset(void);
+
+ /* initialise the iterator object.
+ * We must be given a reference to a case_list_c that will be analysed...
+ */
+ case_element_iterator_c(symbol_c *list, case_element_t element_type);
+
+ /* Skip to the next case element of type chosen. After object creation,
+ * the object references on case element _before_ the first, so
+ * this function must be called once to get the object to
+ * reference the first element...
+ *
+ * Returns the case element's symbol!
+ */
+ symbol_c *next(void);
+
+ private:
+
+ /******************************/
+ /* B 1.2.1 - Numeric Literals */
+ /******************************/
+ void *visit(integer_c *symbol);
+ void *visit(neg_integer_c *symbol);
+
+ /********************************/
+ /* B 1.3.3 - Derived data types */
+ /********************************/
+ /* signed_integer DOTDOT signed_integer */
+ void *visit(subrange_c *symbol);
+
+ /* enumerated_type_name '#' identifier */
+ void *visit(enumerated_value_c *symbol);
+
+ /********************************/
+ /* B 3.2.3 Selection Statements */
+ /********************************/
+ void *visit(case_list_c *symbol);
+
+
+
+}; // function_param_iterator_c
+
+
+
+
+
+
+
--- a/stage4/generate_c/generate_c_st.cc Wed Jul 13 13:57:29 2011 +0200
+++ b/stage4/generate_c/generate_c_st.cc Fri Sep 02 18:15:55 2011 +0200
@@ -52,6 +52,12 @@
fparam_output_vg
} variablegeneration_t;
+ typedef enum {
+ single_cg,
+ subrange_cg,
+ none_cg
+ } casegeneration_t;
+
private:
/* When calling a function block, we must first find it's type,
* by searching through the declarations of the variables currently
@@ -88,7 +94,10 @@
int fcall_number;
symbol_c *fbname;
+ bool first_subrange_case_list;
+
variablegeneration_t wanted_variablegeneration;
+ casegeneration_t wanted_casegeneration;
public:
generate_c_st_c(stage4out_c *s4o_ptr, symbol_c *name, symbol_c *scope, const char *variable_prefix = NULL)
@@ -102,6 +111,7 @@
fcall_number = 0;
fbname = name;
wanted_variablegeneration = expression_vg;
+ wanted_casegeneration = none_cg;
}
virtual ~generate_c_st_c(void) {
@@ -207,6 +217,24 @@
return NULL;
}
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+/* signed_integer DOTDOT signed_integer */
+void *visit(subrange_c *symbol) {
+ switch (wanted_casegeneration) {
+ case subrange_cg:
+ s4o.print("case_expression >= ");
+ symbol->lower_limit->accept(*this);
+ s4o.print(" && case_expression <= ");
+ symbol->upper_limit->accept(*this);
+ break;
+ default:
+ break;
+ }
+ return NULL;
+}
+
/*********************/
/* B 1.4 - Variables */
/*********************/
@@ -1005,38 +1033,114 @@
}
void *visit(case_statement_c *symbol) {
- s4o.print("switch(");
+ symbol_c *expression_type = search_expression_type->get_type(symbol->expression);
+ s4o.print("{\n");
+ s4o.indent_right();
+ if (search_base_type.type_is_enumerated(expression_type)) {
+ s4o.print(s4o.indent_spaces);
+ expression_type->accept(*this);
+ s4o.print(" case_expression = ");
+ }
+ else {
+ s4o.print(s4o.indent_spaces + "IEC_LINT case_expression = (IEC_LINT)");
+ }
symbol->expression->accept(*this);
- s4o.print(") {\n");
+ s4o.print(";\n" + s4o.indent_spaces + "switch (case_expression) {\n");
s4o.indent_right();
+ wanted_casegeneration = single_cg;
+ symbol->case_element_list->accept(*this);
+ wanted_casegeneration = subrange_cg;
+ s4o.print(s4o.indent_spaces + "default:\n");
+ s4o.indent_right();
+ first_subrange_case_list = true;
symbol->case_element_list->accept(*this);
if (symbol->statement_list != NULL) {
- s4o.print(s4o.indent_spaces + "default:\n");
+ if (!first_subrange_case_list) {
+ s4o.print(s4o.indent_spaces + "else {\n");
+ s4o.indent_right();
+ }
+ symbol->statement_list->accept(*this);
+ if (!first_subrange_case_list) {
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n");
+ }
+ }
+ s4o.print(s4o.indent_spaces + "break;\n");
+ s4o.indent_left();
+ wanted_casegeneration = none_cg;
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n");
+ 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) {
+ case_element_iterator_c *case_element_iterator;
+ symbol_c* element = NULL;
+ bool first_element = true;
+
+ switch (wanted_casegeneration) {
+ case single_cg:
+ case_element_iterator = new case_element_iterator_c(symbol->case_list, case_element_iterator_c::element_single);
+ for (element = case_element_iterator->next(); element != NULL; element = case_element_iterator->next()) {
+ if (first_element) first_element = false;
+ s4o.print(s4o.indent_spaces + "case ");
+ element->accept(*this);
+ s4o.print(":\n");
+ }
+ delete case_element_iterator;
+ break;
+
+ case subrange_cg:
+ case_element_iterator = new case_element_iterator_c(symbol->case_list, case_element_iterator_c::element_subrange);
+ for (element = case_element_iterator->next(); element != NULL; element = case_element_iterator->next()) {
+ if (first_element) {
+ if (first_subrange_case_list) {
+ s4o.print(s4o.indent_spaces + "if (");
+ first_subrange_case_list = false;
+ }
+ else {
+ s4o.print(s4o.indent_spaces + "else if (");
+ }
+ first_element = false;
+ }
+ else {
+ s4o.print(" && ");
+ }
+ element->accept(*this);
+ }
+ delete case_element_iterator;
+ if (!first_element) {
+ s4o.print(") {\n");
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (!first_element) {
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, "", ", ");}
+ switch (wanted_casegeneration) {
+ case single_cg:
+ s4o.print(s4o.indent_spaces + "break;\n");
+ s4o.indent_left();
+ break;
+ case subrange_cg:
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n");
+ break;
+ default:
+ break;
+ }
+ }
+ return NULL;
+}
/********************************/
/* B 3.2.4 Iteration Statements */