* src/LR0.c (state_list_t, state_list_append): New.

[bison.git] / src / closure.h

diff --git a/src/closure.h b/src/closure.h
index 67759a48d1b75720ed7a4bf58c43c091f89291dc..e47d8d38083295189bd4e55d7fd143223780d8eb 100644 (file)
--- a/src/closure.h
+++ b/src/closure.h
@@ -1,5 +1,5 @@
 /* Subroutines for bison
 /* Subroutines for bison

-   Copyright 1984, 1989, 2000, 2001  Free Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 2000, 2001, 2002  Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -21,8 +21,6 @@
 #ifndef CLOSURE_H_
 # define CLOSURE_H_
 
 #ifndef CLOSURE_H_
 # define CLOSURE_H_
 

-/* Subroutines of file LR0.c. */
-

 /* Allocates the itemset and ruleset vectors, and precomputes useful
    data so that closure can be called.  n is the number of elements to
    allocate for itemset.  */
 /* Allocates the itemset and ruleset vectors, and precomputes useful
    data so that closure can be called.  n is the number of elements to
    allocate for itemset.  */


@@ -30,27 +28,28 @@
 void new_closure PARAMS ((int n));
 
 
 void new_closure PARAMS ((int n));
 
 

-/* Given a vector of item numbers ITEMS, of length N, set up ruleset
-   and itemset to indicate what rules could be run and which items
-   could be accepted when those items are the active ones.
+/* Given the kernel (aka core) of a state (a vector of item numbers
+   ITEMS, of length N), set up RULESET and ITEMSET to indicate what
+   rules could be run and which items could be accepted when those
+   items are the active ones.

 
 

-   ruleset contains a bit for each rule.  closure sets the bits for
+   RULESET contains a bit for each rule.  CLOSURE sets the bits for

    all rules which could potentially describe the next input to be
    read.
 
    all rules which could potentially describe the next input to be
    read.
 

-   itemset is a vector of item numbers; itemsetend points to just
-   beyond the end of the part of it that is significant.  closure
-   places there the indices of all items which represent units of
-   input that could arrive next.  */
+   ITEMSET is a vector of item numbers; NITEMSET is its size
+   (actually, points to just beyond the end of the part of it that is
+   significant).  CLOSURE places there the indices of all items which
+   represent units of input that could arrive next.  */

 
 

-void closure PARAMS ((short *items, int n));
+void closure PARAMS ((item_number_t *items, int n));

 
 
 
 

-/* Frees itemset, ruleset and internal data.  */
+/* Frees ITEMSET, RULESET and internal data.  */

 
 void free_closure PARAMS ((void));
 
 
 void free_closure PARAMS ((void));
 

-extern short *itemset;
-extern size_t itemsetsize;
+extern item_number_t *itemset;
+extern int nritemset;

 
 #endif /* !CLOSURE_H_ */
 
 #endif /* !CLOSURE_H_ */