Clean up handling of %destructor for the end token (token 0).

[bison.git] / src / nullable.c

diff --git a/src/nullable.c b/src/nullable.c
index d65c4f2b43d06cdc33b1f35df151f3e066b03a1c..83a90e9556636d827aee54d5c8d0a300ad849ff1 100644 (file)
--- a/src/nullable.c
+++ b/src/nullable.c
@@ -1,7 +1,7 @@
 /* Calculate which nonterminals can expand into the null string for Bison.
 
-   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2003, 2004 Free
-   Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+   Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -17,14 +17,15 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 
 /* Set up NULLABLE, a vector saying which nonterminals can expand into
    the null string.  NULLABLE[I - NTOKENS] is nonzero if symbol I can
    do so.  */
 
+#include <config.h>
 #include "system.h"
 
 #include "getargs.h"
@@ -61,16 +62,16 @@ nullable_compute (void)
   symbol_number *s2;
   rule_list *p;
 
-  symbol_number *squeue = CALLOC (squeue, nvars);
-  short int *rcount = CALLOC (rcount, nrules);
+  symbol_number *squeue = xnmalloc (nvars, sizeof *squeue);
+  size_t *rcount = xcalloc (nrules, sizeof *rcount);
   /* RITEM contains all the rules, including useless productions.
      Hence we must allocate room for useless nonterminals too.  */
-  rule_list **rsets = CALLOC (rsets, nvars);
+  rule_list **rsets = xcalloc (nvars, sizeof *rsets);
   /* This is said to be more elements than we actually use.
      Supposedly NRITEMS - NRULES is enough.  But why take the risk?  */
-  rule_list *relts = CALLOC (relts, nritems + nvars + 1);
+  rule_list *relts = xnmalloc (nritems + nvars + 1, sizeof *relts);
 
-  CALLOC (nullable, nvars);
+  nullable = xcalloc (nvars, sizeof *nullable);
 
   s1 = s2 = squeue;
   p = relts;
@@ -103,8 +104,8 @@ nullable_compute (void)
        else
          {
            /* This rule has an empty RHS. */
-           if (item_number_as_rule_number (rules_ruleno->rhs[0]) != ruleno)
-             abort ();
+           assert (item_number_as_rule_number (rules_ruleno->rhs[0])
+                   == ruleno);
            if (rules_ruleno->useful
                && ! nullable[rules_ruleno->lhs->number - ntokens])
              {
@@ -126,10 +127,10 @@ nullable_compute (void)
            }
       }
 
-  XFREE (squeue);
-  XFREE (rcount);
-  XFREE (rsets);
-  XFREE (relts);
+  free (squeue);
+  free (rcount);
+  free (rsets);
+  free (relts);
 
   if (trace_flag & trace_sets)
     nullable_print (stderr);
@@ -139,5 +140,5 @@ nullable_compute (void)
 void
 nullable_free (void)
 {
-  XFREE (nullable);
+  free (nullable);
 }