| SETBIT(9) | Kernel Developer's Manual | SETBIT(9) |
setbit —
#include <sys/param.h>
void
setbit(array,
x);
void
clrbit(array,
x);
int
isset(array,
x);
int
isclr(array,
x);
setbit family of macros operate with bitmaps, also
known as bit arrays.
In a nutshell, setbit() sets the bit
x in array,
clrbit() clears it, isset()
tests whether x is set, and
isclr() returns 1 if x is not
set.
char buf[10]; ... setbit(buf, 12); /* set the fifth bit in the second byte */
CHAR_BIT, the number of bits for smallest object that
is not a bit-field.
| December 4, 2012 | NetBSD 9.3 |