(nullable_compute): Do not subtract from the returned value of malloc.

[bison.git] / src / closure.h

diff --git a/src/closure.h b/src/closure.h
index 887f3da86ec61f4e87d6d56d39ffd620a4315b34..8cc4feb2512c6d2ba5213cb19c45e83f30d55bf4 100644 (file)
--- a/src/closure.h
+++ b/src/closure.h
@@ -1,5 +1,7 @@
 /* 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.
 
@@ -21,36 +23,37 @@
 #ifndef CLOSURE_H_
 # define CLOSURE_H_
 
-/* Subroutines of file LR0.c. */
+# include "gram.h"
 
 /* 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.  */
 
-void new_closure PARAMS ((int n));
+void new_closure (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.
 
-   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 (item_number *items, int n);
 
 
-/* Frees itemset, ruleset and internal data.  */
+/* Frees ITEMSET, RULESET and internal data.  */
 
-void free_closure PARAMS ((void));
+void free_closure (void);
 
-extern short *itemset;
-extern int itemsetsize;
+extern item_number *itemset;
+extern int nritemset;
 
 #endif /* !CLOSURE_H_ */