* README: Mention m4 1.4.3. Remove obsolete advice about

[bison.git] / lib / bitset.c

diff --git a/lib/bitset.c b/lib/bitset.c
index 23df17919f6e43d0cc4cab555efd596bbeab01a0..aaf1e87f45cf2e1596e9eb953d97dbb525fd0313 100644 (file)
--- a/lib/bitset.c
+++ b/lib/bitset.c
@@ -1,5 +1,5 @@
 /* General bitsets.
 /* General bitsets.

-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004 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
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 
    This program is free software; you can redistribute it and/or modify


@@ -14,127 +14,39 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
 
    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.  */
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include <stdlib.h>
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include <stdlib.h>

+#include <string.h>

 #include "bitset.h"
 #include "bitset.h"

-#include "sbitset.h"
+#include "abitset.h"

 #include "lbitset.h"
 #include "ebitset.h"
 #include "lbitset.h"
 #include "ebitset.h"

+#include "vbitset.h"
+#include "bitset_stats.h"

 #include "obstack.h"
 
 #include "obstack.h"
 

-static void bitset_print PARAMS ((FILE *, bitset, int));
-
-#if BITSET_STATS
-#define BITSET_STATS_FILE "bitset.dat"
-
-#define BITSET_LOG_COUNT_BINS 10
-#define BITSET_LOG_SIZE_BINS  16
-#define BITSET_DENSITY_BINS  20
-
-struct bitset_type_stats_struct
-{
-  unsigned int xmallocs;
-  unsigned int xfrees;
-  unsigned int oballocs;
-  unsigned int obfrees;
-  unsigned int lists;
-  unsigned int list_counts[BITSET_LOG_COUNT_BINS];
-  unsigned int list_sizes[BITSET_LOG_SIZE_BINS];
-  unsigned int list_density[BITSET_DENSITY_BINS];
-};
-
-struct bitset_stats_struct
-{
-  unsigned int runs;
-  struct bitset_type_stats_struct types[BITSET_TYPE_NUM];
-};
-
-struct bitset_stats_struct bitset_stats_data;
-struct bitset_stats_struct *bitset_stats;
-
-static void bitset_percent_histogram_print PARAMS ((FILE *, const char *,
-                                                   const char *,
-                                                   unsigned int,
-                                                   unsigned int *));
-static void bitset_log_histogram_print PARAMS ((FILE *, const char *,
-                                               const char *,
-                                               unsigned int,
-                                               unsigned int *));
-static void bitset_stats_print_1
-PARAMS ((FILE *, const char *, struct bitset_type_stats_struct *));
-static void bitset_stats_print PARAMS ((FILE *, int));
-static void bitset_stats_read PARAMS ((void));
-static void bitset_stats_write PARAMS ((void));
-
-#define BITSET_STATS_XMALLOCS_INC(TYPE)                \
-  if (bitset_stats)                                    \
-    bitset_stats->types[(TYPE)].xmallocs++
-
-#define BITSET_STATS_XFREES_INC(BSET)                  \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].xfrees++
-
-#define BITSET_STATS_OBALLOCS_INC(TYPE)                \
-  if (bitset_stats)                                    \
-    bitset_stats->types[(TYPE)].oballocs++
-
-#define BITSET_STATS_OBFREES_INC(BSET)                 \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].obfrees++
-
-#define BITSET_STATS_LISTS_INC(BSET)                   \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].lists++
-
-#define BITSET_STATS_LIST_COUNTS_INC(BSET, I)          \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].list_counts[(I)]++
-
-#define BITSET_STATS_LIST_SIZES_INC(BSET, I)           \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].list_sizes[(I)]++
-
-#define BITSET_STATS_LIST_DENSITY_INC(BSET, I)                 \
-  if (bitset_stats)                                    \
-    bitset_stats->types[BITSET_TYPE_ (BSET)].list_density[(I)]++
-
-#else
-#define BITSET_STATS_XMALLOCS_INC(TYPE)
-
-#define BITSET_STATS_XFREES_INC(BSET)
-
-#define BITSET_STATS_OBALLOCS_INC(TYPE)
-
-#define BITSET_STATS_OBFREES_INC(BSET)
-
-#define BITSET_STATS_LISTS_INC(BSET)
-
-#define BITSET_STATS_LIST_COUNTS_INC(BSET, I)
-
-#define BITSET_STATS_LIST_SIZES_INC(BSET, I)
-
-#define BITSET_STATS_LIST_DENSITY_INC(BSET, I)
-#endif /* BITSET_STATS  */
+const char * const bitset_type_names[] = BITSET_TYPE_NAMES;

 
 
 /* Return number of bytes required to create a N_BIT bitset
    of TYPE.  The bitset may grow to require more bytes than this.  */
 
 
 /* Return number of bytes required to create a N_BIT bitset
    of TYPE.  The bitset may grow to require more bytes than this.  */

-int
-bitset_bytes (type, n_bits)
-     enum bitset_type type;
-     bitset_bindex n_bits;
+size_t
+bitset_bytes (enum bitset_type type, bitset_bindex n_bits)

 {
 {

-  unsigned int bytes;
+  size_t bytes;
+
+  if (bitset_stats_enabled)
+    return bitset_stats_bytes ();

 
   switch (type)
     {
     case BITSET_ARRAY:
 
   switch (type)
     {
     case BITSET_ARRAY:

-      bytes = sbitset_bytes (n_bits);
+      bytes = abitset_bytes (n_bits);

       break;
 
     case BITSET_LIST:
       break;
 
     case BITSET_LIST:


@@ -145,6 +57,10 @@ bitset_bytes (type, n_bits)
       bytes = ebitset_bytes (n_bits);
       break;
 
       bytes = ebitset_bytes (n_bits);
       break;
 

+    case BITSET_VARRAY:
+      bytes = vbitset_bytes (n_bits);
+      break;
+

     default:
       abort ();
     }
     default:
       abort ();
     }


@@ -155,15 +71,15 @@ bitset_bytes (type, n_bits)
 
 /* Initialise bitset BSET of TYPE for N_BITS.  */
 bitset
 
 /* Initialise bitset BSET of TYPE for N_BITS.  */
 bitset

-bitset_init (bset, n_bits, type)
-     bitset bset;
-     bitset_bindex n_bits;
-     enum bitset_type type;
+bitset_init (bitset bset, bitset_bindex n_bits, enum bitset_type type)

 {
 {

+  if (bitset_stats_enabled)
+    return bitset_stats_init (bset, n_bits, type);
+

   switch (type)
     {
     case BITSET_ARRAY:
   switch (type)
     {
     case BITSET_ARRAY:

-      return sbitset_init (bset, n_bits);
+      return abitset_init (bset, n_bits);

 
     case BITSET_LIST:
       return lbitset_init (bset, n_bits);
 
     case BITSET_LIST:
       return lbitset_init (bset, n_bits);


@@ -171,6 +87,9 @@ bitset_init (bset, n_bits, type)
     case BITSET_TABLE:
       return ebitset_init (bset, n_bits);
 
     case BITSET_TABLE:
       return ebitset_init (bset, n_bits);
 

+    case BITSET_VARRAY:
+      return vbitset_init (bset, n_bits);
+

     default:
       abort ();
     }
     default:
       abort ();
     }


@@ -181,55 +100,48 @@ bitset_init (bset, n_bits, type)
    specified by ATTR.  For variable size bitsets, N_BITS is only a
    hint and may be zero.  */
 enum bitset_type
    specified by ATTR.  For variable size bitsets, N_BITS is only a
    hint and may be zero.  */
 enum bitset_type

-bitset_type_choose (n_bits, attr)
-     bitset_bindex n_bits ATTRIBUTE_UNUSED;
-     unsigned int attr;
+bitset_type_choose (bitset_bindex n_bits ATTRIBUTE_UNUSED, unsigned int attr)

 {
 {

-  enum bitset_type type;
-
-#if BITSET_CHECK

   /* Check attributes.  */
   if (attr & BITSET_FIXED && attr & BITSET_VARIABLE)
     abort ();
   if (attr & BITSET_SPARSE && attr & BITSET_DENSE)
     abort ();
 
   /* Check attributes.  */
   if (attr & BITSET_FIXED && attr & BITSET_VARIABLE)
     abort ();
   if (attr & BITSET_SPARSE && attr & BITSET_DENSE)
     abort ();
 

-  /* Note that sometimes we will be asked for a zero length
-     fixed size bitset.  */
-#endif
+  /* Choose the type of bitset.  Note that sometimes we will be asked
+  for a zero length fixed size bitset.  */

 
 

-  /* Choose the type of bitset.  */
+  
+  /* If no attributes selected, choose a good compromise.  */
+  if (!attr)
+    return BITSET_VARRAY;

 
 

-  type = BITSET_ARRAY;
-  /* Currently, the simple bitsets do not support a variable size.  */
-  if (attr & BITSET_VARIABLE || attr & BITSET_SPARSE)
-    {
-      type = BITSET_LIST;
-      if (attr & BITSET_DENSE || attr & BITSET_GREEDY)
-       type = BITSET_TABLE;
-    }
+  if (attr & BITSET_SPARSE)
+    return BITSET_LIST;
+
+  if (attr & BITSET_FIXED)
+    return BITSET_ARRAY;

 
 

-  return type;
+  if (attr & BITSET_GREEDY)
+    return BITSET_TABLE;
+
+  return BITSET_VARRAY;

 }
 
 
 /* Create a bitset of N_BITS of type TYPE.  */
 bitset
 }
 
 
 /* Create a bitset of N_BITS of type TYPE.  */
 bitset

-bitset_alloc (n_bits, type)
-     bitset_bindex n_bits;
-     enum bitset_type type;
+bitset_alloc (bitset_bindex n_bits, enum bitset_type type)

 {
 {

-  unsigned int bytes;
+  size_t bytes;

   bitset bset;
 
   bitset bset;
 

-  BITSET_STATS_XMALLOCS_INC (type);
-

   bytes = bitset_bytes (type, n_bits);
 
   bset = (bitset) xcalloc (1, bytes);
 
   /* The cache is disabled until some elements are allocated.  If we
   bytes = bitset_bytes (type, n_bits);
 
   bset = (bitset) xcalloc (1, bytes);
 
   /* The cache is disabled until some elements are allocated.  If we

-     have variable length arrays, then we may need to allocate dummy
+     have variable length arrays, then we may need to allocate a dummy

      element.  */
 
   return bitset_init (bset, n_bits, type);
      element.  */
 
   return bitset_init (bset, n_bits, type);


@@ -238,16 +150,12 @@ bitset_alloc (n_bits, type)
 
 /* Create a bitset of N_BITS of type TYPE.  */
 bitset
 
 /* Create a bitset of N_BITS of type TYPE.  */
 bitset

-bitset_obstack_alloc (bobstack, n_bits, type)
-     struct obstack *bobstack;
-     bitset_bindex n_bits;
-     enum bitset_type type;
+bitset_obstack_alloc (struct obstack *bobstack,
+                     bitset_bindex n_bits, enum bitset_type type)

 {
 {

-  unsigned int bytes;
+  size_t bytes;

   bitset bset;
 
   bitset bset;
 

-  BITSET_STATS_OBALLOCS_INC (type);
-

   bytes = bitset_bytes (type, n_bits);
 
   bset = obstack_alloc (bobstack, bytes);
   bytes = bitset_bytes (type, n_bits);
 
   bset = obstack_alloc (bobstack, bytes);


@@ -260,9 +168,7 @@ bitset_obstack_alloc (bobstack, n_bits, type)
 /* Create a bitset of N_BITS and with attribute hints specified by
    ATTR.  */
 bitset
 /* Create a bitset of N_BITS and with attribute hints specified by
    ATTR.  */
 bitset

-bitset_create (n_bits, attr)
-     bitset_bindex n_bits;
-     unsigned int attr;
+bitset_create (bitset_bindex n_bits, unsigned int attr)

 {
   enum bitset_type type;
 
 {
   enum bitset_type type;
 


@@ -274,11 +180,8 @@ bitset_create (n_bits, attr)
 
 /* Free bitset BSET.  */
 void
 
 /* Free bitset BSET.  */
 void

-bitset_free (bset)
-     bitset bset;
+bitset_free (bitset bset)

 {
 {

-  BITSET_STATS_XFREES_INC (bset);
-

   BITSET_FREE_ (bset);
   free (bset);
 }
   BITSET_FREE_ (bset);
   free (bset);
 }


@@ -286,79 +189,117 @@ bitset_free (bset)
 
 /* Free bitset BSET allocated on obstack.  */
 void
 
 /* Free bitset BSET allocated on obstack.  */
 void

-bitset_obstack_free (bset)
-     bitset bset;
+bitset_obstack_free (bitset bset)

 {
 {

-  BITSET_STATS_OBFREES_INC (bset);
-

   BITSET_FREE_ (bset);
 }
 
 
   BITSET_FREE_ (bset);
 }
 
 

+/* Return bitset type.  */
+enum bitset_type
+bitset_type_get (bitset bset)
+{
+   enum bitset_type type;
+
+   type = BITSET_TYPE_ (bset);
+   if (type != BITSET_STATS)
+      return type;
+
+   return bitset_stats_type_get (bset);
+}
+
+
+/* Return name of bitset type.  */
+const char *
+bitset_type_name_get (bitset bset)
+{
+  enum bitset_type type;
+
+  type = bitset_type_get (bset);
+
+  return bitset_type_names[type];
+}
+
+

 /* Find next bit set in SRC starting from and including BITNO.
 /* Find next bit set in SRC starting from and including BITNO.

-   Return -1 if SRC empty.  */
-int
-bitset_next (src, bitno)
-     bitset src;
-     bitset_bindex bitno;
+   Return BITSET_BINDEX_MAX if SRC empty.  */
+bitset_bindex
+bitset_next (bitset src, bitset_bindex bitno)

 {
   bitset_bindex val;
   bitset_bindex next = bitno;
 
   if (!bitset_list (src, &val, 1, &next))
 {
   bitset_bindex val;
   bitset_bindex next = bitno;
 
   if (!bitset_list (src, &val, 1, &next))

-    return -1;
+    return BITSET_BINDEX_MAX;

   return val;
 }
 
 
   return val;
 }
 
 

+/* Return true if both bitsets are of the same type and size.  */
+extern bool
+bitset_compatible_p (bitset bset1, bitset bset2)
+{
+    return BITSET_COMPATIBLE_ (bset1, bset2);
+}
+
+

 /* Find previous bit set in SRC starting from and including BITNO.
 /* Find previous bit set in SRC starting from and including BITNO.

-   Return -1 if SRC empty.  */
-int
-bitset_prev (src, bitno)
-     bitset src;
-     bitset_bindex bitno;
+   Return BITSET_BINDEX_MAX if SRC empty.  */
+bitset_bindex
+bitset_prev (bitset src, bitset_bindex bitno)

 {
   bitset_bindex val;
   bitset_bindex next = bitno;
 
 {
   bitset_bindex val;
   bitset_bindex next = bitno;
 

-  if (!bitset_reverse_list (src, &val, 1, &next))
-    return -1;
+  if (!bitset_list_reverse (src, &val, 1, &next))
+    return BITSET_BINDEX_MAX;

   return val;
 }
 
 
 /* Find first set bit.   */
   return val;
 }
 
 
 /* Find first set bit.   */

-int
-bitset_first (src)
-     bitset src;
+bitset_bindex
+bitset_first (bitset src)

 {
   return bitset_next (src, 0);
 }
 
 
 /* Find last set bit.   */
 {
   return bitset_next (src, 0);
 }
 
 
 /* Find last set bit.   */

-int
-bitset_last (src)
-     bitset src;
+bitset_bindex
+bitset_last (bitset src)

 {
   return bitset_prev (src, 0);
 }
 
 
 {
   return bitset_prev (src, 0);
 }
 
 

+/* Is BITNO in SRC the only set bit?  */
+bool
+bitset_only_set_p (bitset src, bitset_bindex bitno)
+{
+  bitset_bindex val[2];
+  bitset_bindex next = 0;
+
+  if (bitset_list (src, val, 2, &next) != 1)
+    return false;
+  return val[0] == bitno;
+}
+
+

 /* Print contents of bitset BSET to FILE.   */
 static void
 /* Print contents of bitset BSET to FILE.   */
 static void

-bitset_print (file, bset, verbose)
-     FILE *file;
-     bitset bset;
-     int verbose;
+bitset_print (FILE *file, bitset bset, bool verbose)

 {
 {

-  unsigned int i, pos;
+  unsigned int pos;
+  bitset_bindex i;
+  bitset_iterator iter;

 
   if (verbose)
 
   if (verbose)

-    fprintf (file, "n_bits = %d, set = {", bitset_size (bset));
+    fprintf (file, "n_bits = %lu, set = {",
+            (unsigned long int) bitset_size (bset));

 
   pos = 30;
 
   pos = 30;

-  BITSET_EXECUTE (bset, 0, i,
+  BITSET_FOR_EACH (iter, bset, i, 0)

   {
     if (pos > 70)
       {
   {
     if (pos > 70)
       {


@@ -368,224 +309,131 @@ bitset_print (file, bset, verbose)
 
     fprintf (file, "%d ", i);
     pos += 1 + (i >= 10) + (i >= 100);
 
     fprintf (file, "%d ", i);
     pos += 1 + (i >= 10) + (i >= 100);

-  });
+  };

 
   if (verbose)
     fprintf (file, "}\n");
 }
 
 
 
   if (verbose)
     fprintf (file, "}\n");
 }
 
 

-/* DST = SRC.  Return non-zero if DST != SRC.  */
-int
-bitset_copy (dst, src)
-     bitset dst;
-     bitset src;
-{
-  unsigned int i;
-
-  if (BITSET_COMPATIBLE_ (dst, src))
-    return BITSET_COPY_ (dst, src);
-
-  /* Convert bitset types.  We assume that the DST bitset
-     is large enough to hold the SRC bitset.  */
-  bitset_zero (dst);
-  BITSET_EXECUTE (src, 0, i,
-  {
-     bitset_set (dst, i);
-  });
-
-  return 1;
-}
-
-
-/* Return size in bits of bitset SRC.  */
-int
-bitset_size (src)
-     bitset src;
-{
-  return BITSET_SIZE_ (src);
-}
-
-
-/* Return number of bits set in bitset SRC.  */
-int
-bitset_count (src)
-     bitset src;
-{
-  bitset_bindex list[BITSET_LIST_SIZE];
-  bitset_bindex next;
-  int num;
-  int count;
-  
-  next = 0;
-  for (count = 0; (num = bitset_list (src, list, BITSET_LIST_SIZE, &next));
-       count += num)
-    continue;
-  
-  return count;
-}
-
-
-/* DST = 0.  */
-int
-bitset_zero (dst)
-     bitset dst;
-{
-  return BITSET_ZERO_ (dst);
-}
-
-
-/* DST = ~0.  */
-int
-bitset_ones (dst)
-     bitset dst;
-{
-  return BITSET_ONES_ (dst);
-}
-
-
-/* Return SRC == 0.  */
-int
-bitset_empty_p (src)
-     bitset src;
-{
-  return BITSET_EMPTY_P_ (src);
-}
-
-
-/* Return DST == DST | SRC.  */
-int
-bitset_subset_p (dst, src)
-     bitset dst;
-     bitset src;
+/* Dump bitset BSET to FILE.  */
+void
+bitset_dump (FILE *file, bitset bset)

 {
 {

-  BITSET_CHECK2_ (dst, src);
-  return BITSET_SUBSET_P_ (dst, src);
+  bitset_print (file, bset, false);

 }
 
 
 }
 
 

-/* Return DST == SRC.  */
-int
-bitset_equal_p (dst, src)
-     bitset dst;
-     bitset src;
+/* Release memory associated with bitsets.  */
+void
+bitset_release_memory (void)

 {
 {

-  BITSET_CHECK2_ (dst, src);
-  return BITSET_EQUAL_P_ (dst, src);
+  lbitset_release_memory ();
+  ebitset_release_memory ();

 }
 
 
 }
 
 

-/* Return DST & SRC == 0.  */
-int
-bitset_disjoint_p (dst, src)
-     bitset dst;
-     bitset src;
+/* Toggle bit BITNO in bitset BSET and the new value of the bit.  */
+bool
+bitset_toggle_ (bitset bset, bitset_bindex bitno)

 {
 {

-  BITSET_CHECK2_ (dst, src);
-  return BITSET_DISJOINT_P_ (dst, src);
+  /* This routine is for completeness.  It could be optimized if
+     required.  */
+  if (bitset_test (bset, bitno))
+    {
+      bitset_reset (bset, bitno);
+      return false;
+    }
+  else
+    {
+      bitset_set (bset, bitno);
+      return true;
+    }

 }
 
 
 }
 
 

-/* DST = ~SRC.  */
-int
-bitset_not (dst, src)
-     bitset dst;
-     bitset src;
+/* Return number of bits in bitset SRC.  */
+bitset_bindex
+bitset_size_ (bitset src)

 {
 {

-  BITSET_CHECK2_ (dst, src);
-  return BITSET_NOT_ (dst, src);
+    return BITSET_NBITS_ (src);

 }
 
 
 }
 
 

-/* DST = SRC1 | SRC2.  Return non-zero if DST != SRC1 | SRC2.  */
-int
-bitset_or (dst, src1, src2)
-     bitset dst;
-     bitset src1;
-     bitset src2;
+/* Return number of bits set in bitset SRC.  */
+bitset_bindex
+bitset_count_ (bitset src)

 {
 {

-  BITSET_CHECK3_ (dst, src1, src2);
-  return BITSET_OR_ (dst, src1, src2);
-}
-
+  bitset_bindex list[BITSET_LIST_SIZE];
+  bitset_bindex next;
+  bitset_bindex num;
+  bitset_bindex count;

 
 

-/* DST = SRC1 & SRC2.  Return non-zero if DST != SRC1 & SRC2.  */
-int
-bitset_and (dst, src1, src2)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-{
-  BITSET_CHECK3_ (dst, src1, src2);
-  return BITSET_AND_ (dst, src1, src2);
-}
+  /* This could be greatly sped up by adding a count method for each
+     bitset implementation that uses a direct technique (based on
+     masks) for counting the number of bits set in a word.  */

 
 

+  next = 0;
+  for (count = 0; (num = bitset_list (src, list, BITSET_LIST_SIZE, &next));
+       count += num)
+    continue;

 
 

-/* DST = SRC1 ^ SRC2.  Return non-zero if DST != SRC1 ^ SRC2.  */
-int
-bitset_xor (dst, src1, src2)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-{
-  BITSET_CHECK3_ (dst, src1, src2);
-  return BITSET_XOR_ (dst, src1, src2);
+  return count;

 }
 
 
 }
 
 

-/* DST = SRC1 & ~SRC2.  Return non-zero if DST != SRC1 & ~SRC2.  */
-int
-bitset_andn (dst, src1, src2)
-     bitset dst;
-     bitset src1;
-     bitset src2;
+/* DST = SRC.  Return true if DST != SRC.
+   This is a fallback for the case where SRC and DST are different
+   bitset types.  */
+bool
+bitset_copy_ (bitset dst, bitset src)

 {
 {

-  BITSET_CHECK3_ (dst, src1, src2);
-  return BITSET_ANDN_ (dst, src1, src2);
-}
+  bitset_bindex i;
+  bitset_iterator iter;

 
 

+  /* Convert bitset types.  We assume that the DST bitset
+     is large enough to hold the SRC bitset.  */
+  bitset_zero (dst);
+  BITSET_FOR_EACH (iter, src, i, 0)
+  {
+     bitset_set (dst, i);
+  };

 
 

-/* DST = SRC1 | ~SRC2.  Return non-zero if DST != SRC1 | ~SRC2.  */
-int
-bitset_orn (dst, src1, src2)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-{
-  BITSET_CHECK3_ (dst, src1, src2);
-  return BITSET_ORN_ (dst, src1, src2);
+  return true;

 }
 
 
 }
 
 

-int
-bitset_op4 (dst, src1, src2, src3, op)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-     bitset src3;
-     enum bitset_ops op;
+/* This is a fallback for implementations that do not support
+   four operand operations.  */
+static inline bool
+bitset_op4_cmp (bitset dst, bitset src1, bitset src2, bitset src3,
+               enum bitset_ops op)

 {
 {

-  int changed = 0;
+  bool changed = false;
+  bool stats_enabled_save;

   bitset tmp;
 
   /* Create temporary bitset.  */
   bitset tmp;
 
   /* Create temporary bitset.  */

-  tmp = bitset_alloc (BITSET_TYPE_ (dst), 0);
+  stats_enabled_save = bitset_stats_enabled;
+  bitset_stats_enabled = false;
+  tmp = bitset_alloc (0, bitset_type_get (dst));
+  bitset_stats_enabled = stats_enabled_save;

 
   switch (op)
     {
     case BITSET_OP_OR_AND:
 
   switch (op)
     {
     case BITSET_OP_OR_AND:

-      BITSET_OR_ (tmp, src1, src2);
-      changed = BITSET_AND_ (dst, src3, tmp);
+      bitset_or (tmp, src1, src2);
+      changed = bitset_and_cmp (dst, src3, tmp);

       break;
 
     case BITSET_OP_AND_OR:
       break;
 
     case BITSET_OP_AND_OR:

-      BITSET_AND_ (tmp, src1, src2);
-      changed = BITSET_OR_ (dst, src3, tmp);
+      bitset_and (tmp, src1, src2);
+      changed = bitset_or_cmp (dst, src3, tmp);

       break;
 
     case BITSET_OP_ANDN_OR:
       break;
 
     case BITSET_OP_ANDN_OR:

-      BITSET_ANDN_ (tmp, src1, src2);
-      changed = BITSET_OR_ (dst, src3, tmp);
+      bitset_andn (tmp, src1, src2);
+      changed = bitset_or_cmp (dst, src3, tmp);

       break;
 
     default:
       break;
 
     default:


@@ -597,316 +445,61 @@ bitset_op4 (dst, src1, src2, src3, op)
 }
 
 
 }
 
 

-/* DST = (SRC1 | SRC2) & SRC3.  Return non-zero if
-   DST != (SRC1 | SRC2) & SRC3.  */
-int
-bitset_or_and (dst, src1, src2, src3)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-     bitset src3;
+/* DST = (SRC1 & SRC2) | SRC3.  */
+void
+bitset_and_or_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-  BITSET_CHECK4_ (dst, src1, src2, src3);
-  return BITSET_OR_AND_ (dst, src1, src2, src3);
+  bitset_and_or_cmp_ (dst, src1, src2, src3);

 }
 
 
 /* DST = (SRC1 & SRC2) | SRC3.  Return non-zero if
    DST != (SRC1 & SRC2) | SRC3.  */
 }
 
 
 /* DST = (SRC1 & SRC2) | SRC3.  Return non-zero if
    DST != (SRC1 & SRC2) | SRC3.  */

-int
-bitset_and_or (dst, src1, src2, src3)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-     bitset src3;
+bool
+bitset_and_or_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-  BITSET_CHECK4_ (dst, src1, src2, src3);
-  return BITSET_AND_OR_ (dst, src1, src2, src3);
+  return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_AND_OR);

 }
 
 
 }
 
 

-/* DST = (SRC1 & ~SRC2) | SRC3.  Return non-zero if
-   DST != (SRC1 & ~SRC2) | SRC3.  */
-int
-bitset_andn_or (dst, src1, src2, src3)
-     bitset dst;
-     bitset src1;
-     bitset src2;
-     bitset src3;
-{
-  BITSET_CHECK4_ (dst, src1, src2, src3);
-  return BITSET_ANDN_OR_ (dst, src1, src2, src3);
-}
-
-
-/* Dump bitset BSET to FILE.  */
-void
-bitset_dump (file, bset)
-     FILE *file;
-     bitset bset;
-{
-  bitset_print (file, bset, 0);
-}
-
-
-/* Function to be called from debugger to print bitset.  */
-void
-debug_bitset (bset)
-     bitset bset;
-{
-  if (bset)
-    bitset_print (stderr, bset, 1);
-}
-
-
-/* Release memory associated with bitsets.  */
+/* DST = (SRC1 & ~SRC2) | SRC3.  */

 void
 void

-bitset_release_memory ()
+bitset_andn_or_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-  lbitset_release_memory ();
-  ebitset_release_memory ();
+  bitset_andn_or_cmp_ (dst, src1, src2, src3);

 }
 
 
 }
 
 

-#if BITSET_STATS
-int
-bitset_list (bset, list, num, next)
-     bitset bset;
-     bitset_bindex *list;
-     bitset_bindex num;
-     bitset_bindex *next;
-{
-  bitset_bindex count;
-
-  count = BITSET_LIST_ (bset, list, num, next);
-
-  if (bitset_stats)
-    {
-      bitset_bindex tmp;
-      bitset_bindex size;
-      bitset_bindex i;
-      enum bitset_type type;
-
-      type = BITSET_TYPE_ (bset);
-      BITSET_STATS_LISTS_INC (bset);
-
-      /* Log histogram of number of set bits.  */
-      for (i = 0, tmp = count; tmp; tmp >>= 1, i++)
-       continue;
-      if (i >= BITSET_LOG_COUNT_BINS)
-       i = BITSET_LOG_COUNT_BINS - 1;
-      BITSET_STATS_LIST_COUNTS_INC (bset, i);
-
-      /* Log histogram of number of bits in set.  */
-      size = bitset_size (bset);
-      for (i = 0, tmp = size; tmp; tmp >>= 1, i++)
-       continue;
-      if (i >= BITSET_LOG_SIZE_BINS)
-       i = BITSET_LOG_SIZE_BINS - 1;
-      BITSET_STATS_LIST_SIZES_INC (bset, i);
-
-      /* Histogram of fraction of bits set.  */
-      i = size ? (count * BITSET_DENSITY_BINS) / size : 0;
-      if (i >= BITSET_DENSITY_BINS)
-       i = BITSET_DENSITY_BINS - 1;
-      BITSET_STATS_LIST_DENSITY_INC (bset, i);
-    }
-  return count;
-}
-
-
-/* Print a percentage histogram with message MSG to FILE.  */
-static void
-bitset_percent_histogram_print (file, name, msg, n_bins, bins)
-     FILE *file;
-     const char *name;
-     const char *msg;
-     unsigned int n_bins;
-     unsigned int *bins;
-{
-  unsigned int i;
-  unsigned int total;
-
-  total = 0;
-  for (i = 0; i < n_bins; i++)
-    total += bins[i];
-
-  if (!total)
-    return;
-
-  fprintf (file, "%s %s", name, msg);
-  for (i = 0; i < n_bins; i++)
-    fprintf (file, "%.0f-%.0f%%\t%8d (%5.1f%%)\n",
-            i * 100.0 / n_bins,
-            (i + 1) * 100.0 / n_bins, bins[i],
-            (100.0 * bins[i]) / total);
-}
-
-
-/* Print a log histogram with message MSG to FILE.  */
-static void
-bitset_log_histogram_print (file, name, msg, n_bins, bins)
-     FILE *file;
-     const char *name;
-     const char *msg;
-     unsigned int n_bins;
-     unsigned int *bins;
-{
-  unsigned int i;
-  unsigned int total;
-  unsigned int max_width;
-
-  total = 0;
-  for (i = 0; i < n_bins; i++)
-    total += bins[i];
-
-  if (!total)
-    return;
-
-  /* 2 * ceil (log10(2) * (N - 1)) + 1  */
-  max_width = 2 * (unsigned int) (0.30103 * (n_bins - 1) + 0.9999) + 1;
-
-  fprintf (file, "%s %s", name, msg);
-  for (i = 0; i < 2; i++)
-    fprintf (file, "%*d\t%8d (%5.1f%%)\n",
-            max_width, i, bins[i], 100.0 * bins[i] / total);
-
-  /* Perhaps we should bail out once the histogram goes to zero.  */
-  for (; i < n_bins; i++)
-    fprintf (file, "%*d-%d\t%8d (%5.1f%%)\n",
-            max_width - ((unsigned int) (0.30103 * (i) + 0.9999) + 1),
-            1 << (i - 1), (1 << i) - 1, bins[i],
-            (100.0 * bins[i]) / total);
-}
-
-
-/* Print bitset statistics to FILE.  */
-static void
-bitset_stats_print_1 (file, name, stats)
-     FILE *file;
-     const char *name;
-     struct bitset_type_stats_struct *stats;
+/* DST = (SRC1 & ~SRC2) | SRC3.  Return non-zero if
+   DST != (SRC1 & ~SRC2) | SRC3.  */
+bool
+bitset_andn_or_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-  if (!stats)
-    return;
-
-  fprintf (file, "%d %ss xmalloced, %d freed.\n",
-          stats->xmallocs, name, stats->xfrees);
-  fprintf (file, "%d %ss oballoced, %d freed.\n",
-          stats->oballocs, name, stats->obfrees);
-
-  fprintf (file, "%d bitset_lists\n", stats->lists);
-
-  bitset_log_histogram_print (file, name, "count log histogram\n",
-                             BITSET_LOG_COUNT_BINS, stats->list_counts);
-
-  bitset_log_histogram_print (file, name, "size log histogram\n",
-                             BITSET_LOG_SIZE_BINS, stats->list_sizes);
-
-  bitset_percent_histogram_print (file, name, "density histogram\n",
-                                 BITSET_DENSITY_BINS, stats->list_density);
+  return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_ANDN_OR);

 }
 
 
 }
 
 

-/* Print all bitset statistics to FILE.  */
-static void
-bitset_stats_print (file, verbose)
-     FILE *file;
-     int verbose ATTRIBUTE_UNUSED;
-{
-  int i;
-  static const char *names[] = BITSET_TYPE_NAMES;
-
-  if (!bitset_stats)
-    return;
-
-  fprintf (file, "Bitset statistics:\n\n");
-
-  if (bitset_stats->runs > 1)
-    fprintf (file, "Accumulated runs = %d\n", bitset_stats->runs);
-
-  for (i = 0; i < BITSET_TYPE_NUM; i++)
-    bitset_stats_print_1 (file, names[i], &bitset_stats->types[i]);
-}
-#endif /* BITSET_STATS  */
-
-
-/* Initialise bitset statistics logging.  */
+/* DST = (SRC1 | SRC2) & SRC3.  */

 void
 void

-bitset_stats_init ()
-{
-#if BITSET_STATS
-  bitset_stats = &bitset_stats_data;
-  bitset_stats_read ();
-#endif /* BITSET_STATS  */
-}
-
-
-/* Read bitset statistics file.  */
-static void
-bitset_stats_read ()
+bitset_or_and_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-  FILE *file;
-
-  if (!bitset_stats)
-    return;
-
-  file = fopen (BITSET_STATS_FILE, "r");
-  if (file)
-    {
-      if (fread (&bitset_stats_data, sizeof (bitset_stats_data),
-                1, file) != 1)
-       {
-         if (ferror (file))
-           perror ("Could not read stats file.");
-         else
-           fprintf (stderr, "Bad stats file size.\n");
-       }
-      fclose (file);
-    }
-  bitset_stats_data.runs++;
+  bitset_or_and_cmp_ (dst, src1, src2, src3);

 }
 
 
 }
 
 

-/* Write bitset statistics file.  */
-static void
-bitset_stats_write ()
-{
-  FILE *file;
-
-  if (!bitset_stats)
-    return;
-
-  file = fopen (BITSET_STATS_FILE, "w");
-  if (file)
-    {
-      if (fwrite (&bitset_stats_data, sizeof (bitset_stats_data),
-                 1, file) != 1)
-       perror ("Could not write stats file.");
-      fclose (file);
-    }
-  else
-    perror ("Could not open stats file for writing.");
-}
-
-
-/* Dump bitset statistics to FILE.  */
-void
-bitset_stats_dump (file)
-     FILE *file;
+/* DST = (SRC1 | SRC2) & SRC3.  Return non-zero if
+   DST != (SRC1 | SRC2) & SRC3.  */
+bool
+bitset_or_and_cmp_ (bitset dst, bitset src1, bitset src2, bitset src3)

 {
 {

-#if BITSET_STATS
-  bitset_stats_print (file, 0);
-  bitset_stats_write ();
-#endif /* BITSET_STATS  */
+  return bitset_op4_cmp (dst, src1, src2, src3, BITSET_OP_OR_AND);

 }
 
 
 }
 
 

-/* Function to be called from debugger to print bitset stats.  */
+/* Function to be called from debugger to print bitset.  */

 void
 void

-debug_bitset_stats (void)
+debug_bitset (bitset bset)

 {
 {

-#if BITSET_STATS
-  bitset_stats_print (stderr, 1);
-#endif /* BITSET_STATS  */
+  if (bset)
+    bitset_print (stderr, bset, true);

 }
 }