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/*
* BIRD Library -- Bitmaps
*
* (c) 2019 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2019 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BITMAP_H_
#define _BIRD_BITMAP_H_
struct bmap
{
u32 size;
u32 *data;
};
void bmap_init(struct bmap *b, pool *p, uint size);
void bmap_reset(struct bmap *b, uint size);
void bmap_grow(struct bmap *b, uint need);
void bmap_free(struct bmap *b);
static inline uint bmap_max(struct bmap *b)
{ return 8 * b->size; }
static inline int bmap_test(struct bmap *b, uint n)
{ return (n < bmap_max(b)) && BIT32_TEST(b->data, n); }
static inline void bmap_set(struct bmap *b, uint n)
{
if (n >= bmap_max(b)) bmap_grow(b, n/8 + 1);
BIT32_SET(b->data, n);
}
static inline void bmap_clear(struct bmap *b, uint n)
{
if (n >= bmap_max(b)) return;
BIT32_CLR(b->data, n);
}
struct hmap
{
u32 size[4];
u32 *data[4];
u32 root[8];
};
static inline uint hmap_max(struct hmap *b)
{ return 8 * b->size[0]; }
static inline int hmap_test(struct hmap *b, uint n)
{ return (n < hmap_max(b)) && BIT32_TEST(b->data[0], n); }
void hmap_init(struct hmap *b, pool *p, uint size);
void hmap_free(struct hmap *b);
void hmap_set(struct hmap *b, uint n);
void hmap_clear(struct hmap *b, uint n);
u32 hmap_first_zero(struct hmap *b);
void hmap_check(struct hmap *b);
#endif
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