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/* bitvector.h -- bit vector functions
*
* Copyright (c) 1994-2012 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __CYRUS_LIB_BITVECTOR_H__
#define __CYRUS_LIB_BITVECTOR_H__
typedef struct bitvector bitvector_t;
#define BV_NOALLOCSIZE 8
struct bitvector
{
unsigned int length;
unsigned int alloc;
/* TODO: should use natural word size, uint32_t or uint64_t,
* for faster searching in bv_next_set() */
union {
unsigned char *alloced;
unsigned char _noalloc[BV_NOALLOCSIZE];
} bits;
};
#define BV_INITIALIZER { 0, 0, {0} }
extern void bv_init(bitvector_t *);
extern void bv_setsize(bitvector_t *, unsigned int i);
extern void bv_prealloc(bitvector_t *, unsigned int);
extern void bv_copy(bitvector_t *to, const bitvector_t *from);
extern void bv_clearall(bitvector_t *);
extern void bv_setall(bitvector_t *);
extern int bv_isset(const bitvector_t *, unsigned int);
extern void bv_set(bitvector_t *, unsigned int);
extern void bv_clear(bitvector_t *, unsigned int);
extern void bv_andeq(bitvector_t *a, const bitvector_t *b);
extern void bv_oreq(bitvector_t *a, const bitvector_t *b);
extern int bv_next_set(const bitvector_t *, int start);
extern int bv_prev_set(const bitvector_t *, int start);
extern int bv_first_set(const bitvector_t *);
extern int bv_last_set(const bitvector_t *);
extern unsigned bv_count(const bitvector_t *);
extern char *bv_cstring(const bitvector_t *);
extern void bv_fini(bitvector_t *);
#endif /* __CYRUS_LIB_BITVECTOR_H__ */
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