build: avoid warnings about set-but-not-used variables

[bison.git] / src / derives.c

diff --git a/src/derives.c b/src/derives.c
index da881ecc521e8277974e22adcb88a24c6c39b94b..41cec8e104f0694fd91779100892ae839647f692 100644 (file)
--- a/src/derives.c
+++ b/src/derives.c
@@ -1,26 +1,24 @@
 /* Match rules with nonterminals for bison,
 
-   Copyright (C) 1984, 1989, 2000, 2001, 2002 Free Software
+   Copyright (C) 1984, 1989, 2000-2003, 2005, 2009-2011 Free Software
    Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
-   Bison is free software; you can redistribute it and/or modify
+   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 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   Bison is distributed in the hope that it will be useful,
+   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 Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include <config.h>
 #include "system.h"
 
 #include "getargs.h"
@@ -37,7 +35,7 @@ typedef struct rule_list
   rule *value;
 } rule_list;
 
-rule ***derives = NULL;
+rule ***derives;
 
 static void
 print_derives (void)
@@ -65,17 +63,17 @@ void
 derives_compute (void)
 {
   symbol_number i;
-  int r;
+  rule_number r;
   rule **q;
 
   /* DSET[NTERM - NTOKENS] -- A linked list of the numbers of the rules
      whose LHS is NTERM.  */
-  rule_list **dset = CALLOC (dset, nvars);
+  rule_list **dset = xcalloc (nvars, sizeof *dset);
 
   /* DELTS[RULE] -- There are NRULES rule number to attach to nterms.
      Instead of performing NRULES allocations for each, have an array
      indexed by rule numbers.  */
-  rule_list *delts = CALLOC (delts, nrules);
+  rule_list *delts = xnmalloc (nrules, sizeof *delts);
 
   for (r = nrules - 1; r >= 0; --r)
     {
@@ -90,8 +88,8 @@ derives_compute (void)
   /* DSET contains what we need under the form of a linked list.  Make
      it a single array.  */
 
-  CALLOC (derives, nvars);
-  CALLOC (q, nvars + nrules);
+  derives = xnmalloc (nvars, sizeof *derives);
+  q = xnmalloc (nvars + nrules, sizeof *q);
 
   for (i = ntokens; i < nsyms; i++)
     {
@@ -116,6 +114,6 @@ derives_compute (void)
 void
 derives_free (void)
 {
-  XFREE (derives[0]);
-  XFREE (derives);
+  free (derives[0]);
+  free (derives);
 }