Import of 2003-06-08 libbitset <http://mail.gnu.org/archive/html/bison-patches/2003-06/msg00005.html>

lib/bitset.h

@@ -1,10 +1,10 @@
 /* Generic bitsets.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003 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 3 of the License, or
+the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
@@ -13,7 +13,8 @@
 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, see <http://www.gnu.org/licenses/>.  */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 #ifndef _BITSET_H
 #define _BITSET_H
@@ -22,12 +23,18 @@
    Only use the functions and macros defined in this file.  */
 
 #include "bbitset.h"
-#include "obstack.h"
-#include <stdio.h>
 
-#if USE_UNLOCKED_IO
-# include "unlocked-io.h"
+/* obstack.h tries to be portable to K&R compilers, but its
+   __INT_TO_PTR macro generates diagnostics on compilers like Tru64 cc
+   that define __STDC__ to 0 when not in strict ANSI mode.  The bitset
+   code assumes C89 or later, so it can avoid these glitches by
+   defining __INT_TO_PTR appropriately for C89 or later.  */
+#ifndef __INT_TO_PTR
+# define __INT_TO_PTR(P) ((void *) ((P) + (char *) 0))
 #endif
+#include "obstack.h"
+
+#include <stdio.h>
 
 /* Attributes used to select a bitset implementation.  */
 enum bitset_attr {BITSET_FIXED = 1,    /* Bitset size fixed.  */
@@ -96,37 +103,38 @@ typedef struct
 
 
 /* Return bytes required for bitset of desired type and size.  */
-extern size_t bitset_bytes (enum bitset_type, bitset_bindex);
+extern size_t bitset_bytes PARAMS ((enum bitset_type, bitset_bindex));
 
 /* Initialise a bitset with desired type and size.  */
-extern bitset bitset_init (bitset, bitset_bindex, enum bitset_type);
+extern bitset bitset_init PARAMS ((bitset, bitset_bindex, enum bitset_type));
 
 /* Select an implementation type based on the desired bitset size
    and attributes.  */
-extern enum bitset_type bitset_type_choose (bitset_bindex, bitset_attrs);
+extern enum bitset_type bitset_type_choose PARAMS ((bitset_bindex,
+						    bitset_attrs));
 
 /* Create a bitset of desired type and size.  The bitset is zeroed.  */
-extern bitset bitset_alloc (bitset_bindex, enum bitset_type);
+extern bitset bitset_alloc PARAMS ((bitset_bindex, enum bitset_type));
 
 /* Free bitset.  */
-extern void bitset_free (bitset);
+extern void bitset_free PARAMS ((bitset));
 
 /* Create a bitset of desired type and size using an obstack.  The
    bitset is zeroed.  */
-extern bitset bitset_obstack_alloc (struct obstack *bobstack,
-				    bitset_bindex, enum bitset_type);
+extern bitset bitset_obstack_alloc PARAMS ((struct obstack *bobstack,
+					    bitset_bindex, enum bitset_type));
 
 /* Free bitset allocated on obstack.  */
-extern void bitset_obstack_free (bitset);
+extern void bitset_obstack_free PARAMS ((bitset));
 
 /* Create a bitset of desired size and attributes.  The bitset is zeroed.  */
-extern bitset bitset_create (bitset_bindex, bitset_attrs);
+extern bitset bitset_create PARAMS ((bitset_bindex, bitset_attrs));
 
 /* Return bitset type.  */
-extern enum bitset_type bitset_type_get (bitset);
+extern enum bitset_type bitset_type_get PARAMS ((bitset));
 
 /* Return bitset type name.  */
-extern const char *bitset_type_name_get (bitset);
+extern const char *bitset_type_name_get PARAMS ((bitset));
 
 
 /* Set bit BITNO in bitset BSET.  */
@@ -178,7 +186,7 @@ bitset_test (bitset bset, bitset_bindex bitno)
 #define bitset_size(SRC) BITSET_SIZE_ (SRC)
 
 /* Change size of bitset.  */
-extern void bitset_resize (bitset, bitset_bindex);
+extern void bitset_resize PARAMS ((bitset, bitset_bindex));
 
 /* Return number of bits set in bitset SRC.  */
 #define bitset_count(SRC) BITSET_COUNT_ (SRC)
@@ -278,36 +286,37 @@ extern void bitset_resize (bitset, bitset_bindex);
  BITSET_LIST_REVERSE_ (BSET, LIST, NUM, NEXT)
 
 /* Return true if both bitsets are of the same type and size.  */
-extern bool bitset_compatible_p (bitset bset1, bitset bset2);
+extern bool
+bitset_compatible_p (bitset bset1, bitset bset2);
 
 /* Find next set bit from the given bit index.  */
-extern bitset_bindex bitset_next (bitset, bitset_bindex);
+extern bitset_bindex bitset_next PARAMS ((bitset, bitset_bindex));
 
 /* Find previous set bit from the given bit index.  */
-extern bitset_bindex bitset_prev (bitset, bitset_bindex);
+extern bitset_bindex bitset_prev PARAMS ((bitset, bitset_bindex));
 
 /* Find first set bit.  */
-extern bitset_bindex bitset_first (bitset);
+extern bitset_bindex bitset_first PARAMS ((bitset));
 
 /* Find last set bit.  */
-extern bitset_bindex bitset_last (bitset);
+extern bitset_bindex bitset_last PARAMS ((bitset));
 
 /* Return nonzero if this is the only set bit.  */
-extern bool bitset_only_set_p (bitset, bitset_bindex);
+extern bool bitset_only_set_p PARAMS ((bitset, bitset_bindex));
 
 /* Dump bitset.  */
-extern void bitset_dump (FILE *, bitset);
+extern void bitset_dump PARAMS ((FILE *, bitset));
 
 /* Loop over all elements of BSET, starting with MIN, setting INDEX
    to the index of each set bit.  For example, the following will print
    the bits set in a bitset:
 
-   bitset_bindex i;
+   bitset_bindex index;
    bitset_iterator iter;
 
-   BITSET_FOR_EACH (iter, src, i, 0)
+   BITSET_FOR_EACH (iter, src, index, 0)
    {
-      printf ("%lu ", (unsigned long int) i);
+      printf ("%ld ", index);
    };
 */
 #define BITSET_FOR_EACH(ITER, BSET, INDEX, MIN)				      \
@@ -324,12 +333,12 @@ extern void bitset_dump (FILE *, bitset);
    MIN,  setting INDEX to the index of each set bit. For example, the
    following will print the bits set in a bitset in reverse order:
 
-   bitset_bindex i;
+   bitset_bindex index;
    bitset_iterator iter;
 
-   BITSET_FOR_EACH_REVERSE (iter, src, i, 0)
+   BITSET_FOR_EACH_REVERSE (iter, src, index, 0)
    {
-      printf ("%lu ", (unsigned long int) i);
+      printf ("%ld ", index);
    };
 */
 #define BITSET_FOR_EACH_REVERSE(ITER, BSET, INDEX, MIN)			      \
@@ -365,27 +374,28 @@ extern void bitset_dump (FILE *, bitset);
 
 
 /* Release any memory tied up with bitsets.  */
-extern void bitset_release_memory (void);
+extern void bitset_release_memory PARAMS ((void));
 
 /* Enable bitset stats gathering.  */
-extern void bitset_stats_enable (void);
+extern void bitset_stats_enable PARAMS ((void));
 
 /* Disable bitset stats gathering.  */
-extern void bitset_stats_disable (void);
+extern void bitset_stats_disable PARAMS ((void));
 
 /* Read bitset stats file of accummulated stats.  */
-void bitset_stats_read (const char *file_name);
+void bitset_stats_read PARAMS ((const char *filename));
 
 /* Write bitset stats file of accummulated stats.  */
-void bitset_stats_write (const char *file_name);
+void bitset_stats_write PARAMS ((const char *filename));
 
 /* Dump bitset stats.  */
-extern void bitset_stats_dump (FILE *);
+extern void bitset_stats_dump PARAMS ((FILE *));
 
 /* Function to debug bitset from debugger.  */
-extern void debug_bitset (bitset);
+extern void debug_bitset PARAMS ((bitset));
 
 /* Function to debug bitset stats from debugger.  */
-extern void debug_bitset_stats (void);
+extern void debug_bitset_stats PARAMS ((void));
 
 #endif /* _BITSET_H  */
+