c++: use nullptr for C++11.

[bison.git] / lib / bitset_stats.c

diff --git a/lib/bitset_stats.c b/lib/bitset_stats.c
index bc771584472240d0e5fe5cc7ac68b909ecc05198..bde9b98848109f24a042cce8c1dad53fea9f02d2 100644 (file)
--- a/lib/bitset_stats.c
+++ b/lib/bitset_stats.c
@@ -1,10 +1,12 @@
 /* Bitset statistics.
-   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+
+   Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.
+
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 
-   This program 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 of the License, or
+   the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -13,28 +15,24 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* This file is a wrapper bitset implementation for the other bitset
    implementations.  It provides bitset compatibility checking and
    statistics gathering without having to instrument the bitset
    implementations.  When statistics gathering is enabled, the bitset
    operations get vectored through here and we then call the appropriate
-   routines.
-*/
+   routines.  */
+
+#include <config.h>
 
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include "bitset_stats.h"
 
 #include "bbitset.h"
 #include "abitset.h"
 #include "ebitset.h"
 #include "lbitset.h"
 #include "vbitset.h"
-#include "bitset_stats.h"
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -241,29 +239,29 @@ bitset_stats_disable (void)
 
 /* Read bitset statistics file.  */
 void
-bitset_stats_read (const char *filename)
+bitset_stats_read (const char *file_name)
 {
   FILE *file;
 
   if (!bitset_stats_info)
     return;
 
-  if (!filename)
-    filename = BITSET_STATS_FILE;
+  if (!file_name)
+    file_name = BITSET_STATS_FILE;
 
-  file = fopen (filename, "r");
+  file = fopen (file_name, "r");
   if (file)
     {
       if (fread (&bitset_stats_info_data, sizeof (bitset_stats_info_data),
-                1, file) != 1)
-       {
-         if (ferror (file))
-           perror (_("Could not read stats file."));
-         else
-           fprintf (stderr, _("Bad stats file size.\n"));
-       }
+                 1, file) != 1)
+        {
+          if (ferror (file))
+            perror (_("cannot read stats file"));
+          else
+            fprintf (stderr, _("bad stats file size\n"));
+        }
       if (fclose (file) != 0)
-       perror (_("Could not read stats file."));
+        perror (_("cannot read stats file"));
     }
   bitset_stats_info_data.runs++;
 }
@@ -271,27 +269,27 @@ bitset_stats_read (const char *filename)
 
 /* Write bitset statistics file.  */
 void
-bitset_stats_write (const char *filename)
+bitset_stats_write (const char *file_name)
 {
   FILE *file;
 
   if (!bitset_stats_info)
     return;
 
-  if (!filename)
-    filename = BITSET_STATS_FILE;
+  if (!file_name)
+    file_name = BITSET_STATS_FILE;
 
-  file = fopen (filename, "w");
+  file = fopen (file_name, "w");
   if (file)
     {
       if (fwrite (&bitset_stats_info_data, sizeof (bitset_stats_info_data),
-                 1, file) != 1)
-       perror (_("Could not write stats file."));
+                  1, file) != 1)
+        perror (_("cannot write stats file"));
       if (fclose (file) != 0)
-       perror (_("Could not write stats file."));
+        perror (_("cannot write stats file"));
     }
   else
-    perror (_("Could not open stats file for writing."));
+    perror (_("cannot open stats file for writing"));
 }
 
 
@@ -578,11 +576,9 @@ bitset_stats_list (bitset bset, bitset_bindex *list,
   bitset_bindex tmp;
   bitset_bindex size;
   bitset_bindex i;
-  enum bitset_type type;
 
   count = BITSET_LIST_ (bset->s.bset, list, num, next);
 
-  type = BITSET_TYPE_ (bset->s.bset);
   BITSET_STATS_LISTS_INC (bset->s.bset);
 
   /* Log histogram of number of set bits.  */
@@ -696,6 +692,9 @@ bitset_stats_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
      we are a wrapper over.  */
   switch (type)
     {
+    default:
+      abort ();
+
     case BITSET_ARRAY:
       bytes = abitset_bytes (n_bits);
       sbset = xcalloc (1, bytes);
@@ -719,9 +718,6 @@ bitset_stats_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)
       sbset = xcalloc (1, bytes);
       vbitset_init (sbset, n_bits);
       break;
-
-    default:
-      abort ();
     }
 
   bset->s.bset = sbset;