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/* $OpenBSD: bitmap.h,v 1.2 2017/10/20 01:56:39 djm Exp $ */
/*
* Copyright (c) 2015 Damien Miller <djm@mindrot.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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 _BITMAP_H
#define _BITMAP_H
#include <sys/types.h>
/* Simple bit vector routines */
struct bitmap;
/* Allocate a new bitmap. Returns NULL on allocation failure. */
struct bitmap *bitmap_new(void);
/* Free a bitmap */
void bitmap_free(struct bitmap *b);
/* Zero an existing bitmap */
void bitmap_zero(struct bitmap *b);
/* Test whether a bit is set in a bitmap. */
int bitmap_test_bit(struct bitmap *b, u_int n);
/* Set a bit in a bitmap. Returns 0 on success or -1 on error */
int bitmap_set_bit(struct bitmap *b, u_int n);
/* Clear a bit in a bitmap */
void bitmap_clear_bit(struct bitmap *b, u_int n);
/* Return the number of bits in a bitmap (i.e. the position of the MSB) */
size_t bitmap_nbits(struct bitmap *b);
/* Return the number of bytes needed to represent a bitmap */
size_t bitmap_nbytes(struct bitmap *b);
/* Convert a bitmap to a big endian byte string */
int bitmap_to_string(struct bitmap *b, void *p, size_t l);
/* Convert a big endian byte string to a bitmap */
int bitmap_from_string(struct bitmap *b, const void *p, size_t l);
#endif /* _BITMAP_H */
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