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/* Functions to support lbitsets.
Copyright (C) 2002 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
it under the terms of the GNU General Public License as published by
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,
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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef _LBITSET_H
#define _LBITSET_H
#include "bitset-int.h"
/* Number of words to use for each element. The larger the value the
greater the size of the cache and the shorter the time to find a given bit
but the more memory wasted for sparse bitsets and the longer the time
to search for set bits. */
#ifndef LBITSET_ELT_WORDS
#define LBITSET_ELT_WORDS 2
#endif
typedef bitset_word lbitset_word;
#define LBITSET_WORD_BITS BITSET_WORD_BITS
/* Number of bits stored in each element. */
#define LBITSET_ELT_BITS \
((unsigned) (LBITSET_ELT_WORDS * LBITSET_WORD_BITS))
/* Lbitset element. We use an array of bits for each element.
These are linked together in a doubly-linked list. */
typedef struct lbitset_elt_struct
{
struct lbitset_elt_struct *next; /* Next element. */
struct lbitset_elt_struct *prev; /* Previous element. */
bitset_windex index; /* bitno / BITSET_WORD_BITS. */
bitset_word words[LBITSET_ELT_WORDS]; /* Bits that are set. */
} lbitset_elt;
/* Head of lbitset linked list. */
typedef struct lbitset_struct
{
lbitset_elt *head; /* First element in linked list. */
lbitset_elt *tail; /* Last element in linked list. */
} *lbitset;
extern int lbitset_bytes PARAMS ((bitset_bindex));
extern void lbitset_release_memory PARAMS ((void));
#endif
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