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Add test_bit to utils bitmap

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Add test_bit() to the trivial utils bitmap.c implementation.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2024-03-06 17:16:50 -08:00
committed by Auke Kok
parent 7f6032d9b4
commit 295f751aed
2 changed files with 6 additions and 0 deletions
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5
utils/src/bitmap.c
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@@ -10,6 +10,11 @@
* Just a quick simple native bitmap.
*/
int test_bit(unsigned long *bits, u64 nr)
{
return !!(bits[nr / BITS_PER_LONG] & (1UL << (nr & (BITS_PER_LONG - 1))));
}
void set_bit(unsigned long *bits, u64 nr)
{
bits[nr / BITS_PER_LONG] |= 1UL << (nr & (BITS_PER_LONG - 1));

1
utils/src/bitmap.h
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@@ -1,6 +1,7 @@
#ifndef _BITMAP_H_
#define _BITMAP_H_
int test_bit(unsigned long *bits, u64 nr);
void set_bit(unsigned long *bits, u64 nr);
void clear_bit(unsigned long *bits, u64 nr);
u64 find_next_set_bit(unsigned long *start, u64 from, u64 total);