etisserant@0: /*
msousa@261:  *  matiec - a compiler for the programming languages defined in IEC 61131-3
msousa@261:  *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)
msousa@261:  *
msousa@261:  *  This program is free software: you can redistribute it and/or modify
msousa@261:  *  it under the terms of the GNU General Public License as published by
msousa@261:  *  the Free Software Foundation, either version 3 of the License, or
msousa@261:  *  (at your option) any later version.
msousa@261:  *
msousa@261:  *  This program is distributed in the hope that it will be useful,
msousa@261:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
msousa@261:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
msousa@261:  *  GNU General Public License for more details.
msousa@261:  *
msousa@261:  *  You should have received a copy of the GNU General Public License
msousa@261:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
msousa@261:  *
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: /*
msousa@261:  * An IEC 61131-3 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:  * VISITOR.CC
etisserant@0:  *
etisserant@0:  * Three base implementations of the visitor interface,
etisserant@0:  * that may be later extended to execute a particular algorithm.
etisserant@0:  *
etisserant@0:  * The null (class null_visitor_c) does nothing.
etisserant@0:  *
etisserant@0:  * The iterator (class iterator_visitor_c) iterates through
etisserant@0:  * every object in the syntax tree.
etisserant@0:  *
etisserant@0:  * The search class (class search_visitor_c) iterates through
etisserant@0:  * every object, until one returns a value != NULL.
etisserant@0:  */
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #include <unistd.h>
etisserant@0: 
etisserant@0: #include <stdio.h>  /* required for NULL */
etisserant@0: #include "visitor.hh"
etisserant@0: 
etisserant@0: #include <iostream>
etisserant@0: 
etisserant@0: 
etisserant@0: /******************/
etisserant@0: /* visitor_c      */
etisserant@0: /******************/
etisserant@0: 
etisserant@0: visitor_c::~visitor_c(void) {return;}
etisserant@0: 
etisserant@0: 
etisserant@0: /******************/
etisserant@0: /* null_visitor_c */
etisserant@0: /******************/
etisserant@0: 
etisserant@0: null_visitor_c::~null_visitor_c(void) {return;}
etisserant@0: 
etisserant@0: #define SYM_LIST(class_name_c)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
etisserant@0: #define SYM_TOKEN(class_name_c)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
etisserant@0: #define SYM_REF0(class_name_c)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
mario@69: #define SYM_REF1(class_name_c, ref1)	\
mario@69:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
mario@69: 
etisserant@0: #define SYM_REF2(class_name_c, ref1, ref2)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
mario@69: #define SYM_REF3(class_name_c, ref1, ref2, ref3)	\
mario@69:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
mario@69: 
etisserant@0: #define SYM_REF4(class_name_c, ref1, ref2, ref3, ref4)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
mario@69: #define SYM_REF5(class_name_c, ref1, ref2, ref3, ref4, ref5)	\
mario@69:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
mario@69: 
etisserant@0: #define SYM_REF6(class_name_c, ref1, ref2, ref3, ref4, ref5, ref6)	\
etisserant@0:   void *null_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
etisserant@0: 
etisserant@0: #include "absyntax.def"
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #undef SYM_LIST
etisserant@0: #undef SYM_TOKEN
etisserant@0: #undef SYM_REF0
mario@69: #undef SYM_REF1
etisserant@0: #undef SYM_REF2
mario@69: #undef SYM_REF3
etisserant@0: #undef SYM_REF4
mario@69: #undef SYM_REF5
etisserant@0: #undef SYM_REF6
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: /**********************/
etisserant@0: /* iterator_visitor_c */
etisserant@0: /**********************/
etisserant@0: 
etisserant@0: iterator_visitor_c::~iterator_visitor_c(void) {return;}
etisserant@0: 
etisserant@0: 
etisserant@0: void *iterator_visitor_c::visit_list(list_c *list) {
etisserant@0:   for(int i = 0; i < list->n; i++) {
etisserant@0:     list->elements[i]->accept(*this);
etisserant@0:   }
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: #define SYM_LIST(class_name_c)	\
etisserant@0:   void *iterator_visitor_c::visit(class_name_c *symbol) {return visit_list(symbol);}
etisserant@0: 
etisserant@0: #define SYM_TOKEN(class_name_c)	\
etisserant@0:   void *iterator_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
etisserant@0: #define SYM_REF0(class_name_c)	\
etisserant@0:   void *iterator_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
mario@69: #define SYM_REF1(class_name_c, ref1)			\
mario@69: void *iterator_visitor_c::visit(class_name_c *symbol) {	\
mario@69:   if (symbol->ref1!=NULL) symbol->ref1->accept(*this);	\
mario@69:   return NULL;						\
mario@69: }
mario@69: 
etisserant@0: #define SYM_REF2(class_name_c, ref1, ref2)		\
etisserant@0: void *iterator_visitor_c::visit(class_name_c *symbol) {	\
etisserant@0:   if (symbol->ref1!=NULL) symbol->ref1->accept(*this);	\
etisserant@0:   if (symbol->ref2!=NULL) symbol->ref2->accept(*this);	\
etisserant@0:   return NULL;						\
etisserant@0: }
etisserant@0: 
mario@69: #define SYM_REF3(class_name_c, ref1, ref2, ref3)	\
mario@69: void *iterator_visitor_c::visit(class_name_c *symbol) {	\
mario@69:   if (symbol->ref1) symbol->ref1->accept(*this);	\
mario@69:   if (symbol->ref2) symbol->ref2->accept(*this);	\
mario@69:   if (symbol->ref3) symbol->ref3->accept(*this);	\
mario@69:   return NULL;						\
mario@69: }
mario@69: 
etisserant@0: #define SYM_REF4(class_name_c, ref1, ref2, ref3, ref4)	\
etisserant@0: void *iterator_visitor_c::visit(class_name_c *symbol) {	\
etisserant@0:   if (symbol->ref1) symbol->ref1->accept(*this);	\
etisserant@0:   if (symbol->ref2) symbol->ref2->accept(*this);	\
etisserant@0:   if (symbol->ref3) symbol->ref3->accept(*this);	\
etisserant@0:   if (symbol->ref4) symbol->ref4->accept(*this);	\
etisserant@0:   return NULL;						\
etisserant@0: }
etisserant@0: 
mario@69: #define SYM_REF5(class_name_c, ref1, ref2, ref3, ref4, ref5)		\
mario@69: void *iterator_visitor_c::visit(class_name_c *symbol) {			\
mario@69:   if (symbol->ref1) symbol->ref1->accept(*this);			\
mario@69:   if (symbol->ref2) symbol->ref2->accept(*this);			\
mario@69:   if (symbol->ref3) symbol->ref3->accept(*this);			\
mario@69:   if (symbol->ref4) symbol->ref4->accept(*this);			\
mario@69:   if (symbol->ref5) symbol->ref5->accept(*this);			\
mario@69:   return NULL;								\
mario@69: }
etisserant@0: 
etisserant@0: #define SYM_REF6(class_name_c, ref1, ref2, ref3, ref4, ref5, ref6)	\
etisserant@0: void *iterator_visitor_c::visit(class_name_c *symbol) {			\
etisserant@0:   if (symbol->ref1) symbol->ref1->accept(*this);			\
etisserant@0:   if (symbol->ref2) symbol->ref2->accept(*this);			\
etisserant@0:   if (symbol->ref3) symbol->ref3->accept(*this);			\
etisserant@0:   if (symbol->ref4) symbol->ref4->accept(*this);			\
etisserant@0:   if (symbol->ref5) symbol->ref5->accept(*this);			\
etisserant@0:   if (symbol->ref6) symbol->ref6->accept(*this);			\
etisserant@0:   return NULL;								\
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #include "absyntax.def"
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #undef SYM_LIST
etisserant@0: #undef SYM_TOKEN
etisserant@0: #undef SYM_REF0
mario@69: #undef SYM_REF1
etisserant@0: #undef SYM_REF2
mario@69: #undef SYM_REF3
etisserant@0: #undef SYM_REF4
mario@69: #undef SYM_REF5
etisserant@0: #undef SYM_REF6
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: /********************/
etisserant@0: /* search_visitor_c */
etisserant@0: /********************/
etisserant@0: 
etisserant@0: search_visitor_c::~search_visitor_c(void) {return;}
etisserant@0: 
etisserant@0: 
etisserant@0: void *search_visitor_c::visit_list(list_c *list) {
etisserant@0:   for(int i = 0; i < list->n; i++) {
etisserant@0:     void *res = list->elements[i]->accept(*this);
etisserant@0:     if (res != NULL)
etisserant@0:       return res;
etisserant@0:   }
etisserant@0:   return NULL;
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: #define SYM_LIST(class_name_c)	\
etisserant@0:   void *search_visitor_c::visit(class_name_c *symbol) {return visit_list(symbol);}
etisserant@0: 
etisserant@0: #define SYM_TOKEN(class_name_c)	\
etisserant@0:   void *search_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
etisserant@0: #define SYM_REF0(class_name_c)	\
etisserant@0:   void *search_visitor_c::visit(class_name_c *symbol) {return NULL;}
etisserant@0: 
mario@69: #define SYM_REF1(class_name_c, ref1)				\
mario@69: void *search_visitor_c::visit(class_name_c *symbol) {		\
mario@69:   if (symbol->ref1) return symbol->ref1->accept(*this);		\
mario@69:   return NULL;							\
mario@69: }
mario@69: 
etisserant@0: #define SYM_REF2(class_name_c, ref1, ref2)			\
etisserant@0: void *search_visitor_c::visit(class_name_c *symbol) {		\
etisserant@0:   void *res = NULL;						\
etisserant@0:   if (symbol->ref1) res =  symbol->ref1->accept(*this);		\
etisserant@0:   if (res != NULL)  return res;					\
etisserant@0:   if (symbol->ref2) return symbol->ref2->accept(*this);		\
etisserant@0:   return NULL;							\
etisserant@0: }
etisserant@0: 
mario@69: #define SYM_REF3(class_name_c, ref1, ref2, ref3)		\
mario@69: void *search_visitor_c::visit(class_name_c *symbol) {		\
mario@69:   void *res = NULL;						\
mario@69:   if (symbol->ref1) res =  symbol->ref1->accept(*this);		\
mario@69:   if (res != NULL)  return res;					\
mario@69:   if (symbol->ref2) res =  symbol->ref2->accept(*this);		\
mario@69:   if (res != NULL)  return res;					\
mario@69:   if (symbol->ref3) return symbol->ref3->accept(*this);		\
mario@69:   return NULL;							\
mario@69: }
mario@69: 
etisserant@0: #define SYM_REF4(class_name_c, ref1, ref2, ref3, ref4)		\
etisserant@0: void *search_visitor_c::visit(class_name_c *symbol) {		\
etisserant@0:   void *res = NULL;						\
etisserant@0:   if (symbol->ref1) res =  symbol->ref1->accept(*this);		\
etisserant@0:   if (res != NULL)  return res;					\
etisserant@0:   if (symbol->ref2) res =  symbol->ref2->accept(*this);		\
etisserant@0:   if (res != NULL)  return res;					\
etisserant@0:   if (symbol->ref3) res =  symbol->ref3->accept(*this);		\
etisserant@0:   if (res != NULL)  return res;					\
etisserant@0:   if (symbol->ref4) return symbol->ref4->accept(*this);		\
etisserant@0:   return NULL;							\
etisserant@0: }
etisserant@0: 
mario@69: #define SYM_REF5(class_name_c, ref1, ref2, ref3, ref4, ref5)		\
mario@69: void *search_visitor_c::visit(class_name_c *symbol) {			\
mario@69:   void *res = NULL;							\
mario@69:   if (symbol->ref1) res =  symbol->ref1->accept(*this);			\
mario@69:   if (res != NULL)  return res;						\
mario@69:   if (symbol->ref2) res =  symbol->ref2->accept(*this);			\
mario@69:   if (res != NULL)  return res;						\
mario@69:   if (symbol->ref3) res =  symbol->ref3->accept(*this);			\
mario@69:   if (res != NULL)  return res;						\
mario@69:   if (symbol->ref4) res =  symbol->ref4->accept(*this);			\
mario@69:   if (res != NULL)  return res;						\
mario@69:   if (symbol->ref5) return symbol->ref5->accept(*this);			\
mario@69:   return NULL;								\
mario@69: }
etisserant@0: 
etisserant@0: #define SYM_REF6(class_name_c, ref1, ref2, ref3, ref4, ref5, ref6)	\
etisserant@0: void *search_visitor_c::visit(class_name_c *symbol) {			\
etisserant@0:   void *res = NULL;							\
etisserant@0:   if (symbol->ref1) res =  symbol->ref1->accept(*this);			\
etisserant@0:   if (res != NULL)  return res;						\
etisserant@0:   if (symbol->ref2) res =  symbol->ref2->accept(*this);			\
etisserant@0:   if (res != NULL)  return res;						\
etisserant@0:   if (symbol->ref3) res =  symbol->ref3->accept(*this);			\
etisserant@0:   if (res != NULL)  return res;						\
etisserant@0:   if (symbol->ref4) res =  symbol->ref4->accept(*this);			\
etisserant@0:   if (res != NULL)  return res;						\
etisserant@0:   if (symbol->ref5) res =  symbol->ref5->accept(*this);			\
etisserant@0:   if (res != NULL)  return res;						\
etisserant@0:   if (symbol->ref6) return symbol->ref6->accept(*this);			\
etisserant@0:   return NULL;								\
etisserant@0: }
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #include "absyntax.def"
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: #undef SYM_LIST
etisserant@0: #undef SYM_TOKEN
etisserant@0: #undef SYM_REF0
mario@69: #undef SYM_REF1
etisserant@0: #undef SYM_REF2
mario@69: #undef SYM_REF3
etisserant@0: #undef SYM_REF4
mario@69: #undef SYM_REF5
etisserant@0: #undef SYM_REF6
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: 
etisserant@0: