/*
* Copyright (c) 2006 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup genericadt
* @{
*/
/** @file
*/
#ifndef KERN_BITMAP_H_
#define KERN_BITMAP_H_
#include <arch/types.h>
#define BITS2BYTES(bits) (bits ? ((((bits)-1)>>3)+1) : 0)
typedef struct {
uint8_t *map;
size_t bits;
} bitmap_t;
extern void bitmap_initialize(bitmap_t *bitmap, uint8_t *map, size_t bits);
extern void bitmap_set_range(bitmap_t *bitmap, size_t start, size_t bits);
extern void bitmap_clear_range(bitmap_t *bitmap, size_t start, size_t bits);
extern void bitmap_copy(bitmap_t *dst, bitmap_t *src, size_t bits);
static inline int bitmap_get(bitmap_t *bitmap, size_t bit)
{
if(bit >= bitmap->bits)
return 0;
return !! ((bitmap->map)[bit/8] & (1 << (bit & 7)));
}
#endif
/** @}
*/