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

[bison.git] / lib / ebitset.c

diff --git a/lib/ebitset.c b/lib/ebitset.c
index 6006c0e2449d42f1f9823ddf44a42173ee72d3ef..9f35499acb72f574bde7ba2d7c1cc51f0b557c76 100644 (file)
--- a/lib/ebitset.c
+++ b/lib/ebitset.c
@@ -1,10 +1,12 @@
 /* Functions to support expandable bitsets.
-   Copyright (C) 2002, 2003, 2004 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,
@@ -13,15 +15,12 @@
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
 
 #include "ebitset.h"
+
 #include "obstack.h"
 #include <stdlib.h>
 #include <string.h>
@@ -115,11 +114,11 @@ static ebitset_elt *ebitset_free_list;    /* Free list of bitset elements.  */
  ((BSET)->b.cindex = (EINDEX) * EBITSET_ELT_WORDS, \
   (BSET)->b.cdata = EBITSET_WORDS (EBITSET_ELTS (BSET) [EINDEX]))
 
-
+#undef min
+#undef max
 #define min(a, b) ((a) > (b) ? (b) : (a))
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
-
 static bitset_bindex
 ebitset_resize (bitset src, bitset_bindex n_bits)
 {
@@ -136,7 +135,7 @@ ebitset_resize (bitset src, bitset_bindex n_bits)
     {
       bitset_windex size;
 
-      /* The bitset needs to grow.  If we already have enough memory 
+      /* The bitset needs to grow.  If we already have enough memory
         allocated, then just zero what we need.  */
       if (newsize > EBITSET_ASIZE (src))
        {
@@ -149,13 +148,13 @@ ebitset_resize (bitset src, bitset_bindex n_bits)
            size = newsize;
          else
            size = newsize + newsize / 4;
-         
+
          EBITSET_ELTS (src)
            = realloc (EBITSET_ELTS (src), size * sizeof (ebitset_elt *));
          EBITSET_ASIZE (src) = size;
        }
 
-      memset (EBITSET_ELTS (src) + oldsize, 0, 
+      memset (EBITSET_ELTS (src) + oldsize, 0,
              (newsize - oldsize) * sizeof (ebitset_elt *));
     }
   else
@@ -210,7 +209,7 @@ ebitset_elt_alloc (void)
 #define OBSTACK_CHUNK_FREE free
 #endif
 
-#if !defined(__GNUC__) || (__GNUC__ < 2)
+#if ! defined __GNUC__ || __GNUC__ < 2
 #define __alignof__(type) 0
 #endif
 
@@ -322,6 +321,9 @@ ebitset_elt_find (bitset bset, bitset_bindex bindex,
 
   switch (mode)
     {
+    default:
+      abort ();
+
     case EBITSET_FIND:
       return 0;
 
@@ -337,9 +339,6 @@ ebitset_elt_find (bitset bset, bitset_bindex bindex,
 
     case EBITSET_SUBST:
       return &ebitset_zero_elts[0];
-
-    default:
-      abort ();
     }
 }
 
@@ -838,10 +837,10 @@ ebitset_unused_clear (bitset dst)
 {
   unsigned int last_bit;
   bitset_bindex n_bits;
-  
+
   n_bits = BITSET_NBITS_ (dst);
   last_bit = n_bits % EBITSET_ELT_BITS;
-  
+
   if (last_bit)
     {
       bitset_windex eindex;
@@ -849,20 +848,20 @@ ebitset_unused_clear (bitset dst)
       ebitset_elt *elt;
 
       elts = EBITSET_ELTS (dst);
-      
+
       eindex = n_bits / EBITSET_ELT_BITS;
-      
+
       elt = elts[eindex];
       if (elt)
        {
          bitset_windex windex;
          bitset_windex woffset;
          bitset_word *srcp = EBITSET_WORDS (elt);
-         
+
          windex = n_bits / BITSET_WORD_BITS;
          woffset = eindex * EBITSET_ELT_WORDS;
-         
-         srcp[windex - woffset] &= ((bitset_word) 1 << last_bit) - 1;    
+
+         srcp[windex - woffset] &= ((bitset_word) 1 << last_bit) - 1;
          windex++;
          for (; (windex - woffset) < EBITSET_ELT_WORDS; windex++)
            srcp[windex - woffset] = 0;
@@ -1090,6 +1089,9 @@ ebitset_op3_cmp (bitset dst, bitset src1, bitset src2, enum bitset_ops op)
       dstp = EBITSET_WORDS (delt);
       switch (op)
        {
+       default:
+         abort ();
+
        case BITSET_OP_OR:
          for (i = 0; i < EBITSET_ELT_WORDS; i++, dstp++)
            {
@@ -1141,9 +1143,6 @@ ebitset_op3_cmp (bitset dst, bitset src1, bitset src2, enum bitset_ops op)
                }
            }
          break;
-
-       default:
-         abort ();
        }
 
       if (!ebitset_elt_zero_p (delt))
@@ -1336,17 +1335,12 @@ ebitset_bytes (bitset_bindex n_bits ATTRIBUTE_UNUSED)
 bitset
 ebitset_init (bitset bset, bitset_bindex n_bits)
 {
-  bitset_windex size;
-
   bset->b.vtable = &ebitset_vtable;
 
   bset->b.csize = EBITSET_ELT_WORDS;
 
   EBITSET_ZERO_SET (bset);
 
-  size = n_bits ? (n_bits + EBITSET_ELT_BITS - 1) / EBITSET_ELT_BITS
-    : EBITSET_INITIAL_SIZE;
-
   EBITSET_ASIZE (bset) = 0;
   EBITSET_ELTS (bset) = 0;
   ebitset_resize (bset, n_bits);