diff options
Diffstat (limited to 'include/bitops.h')
| -rw-r--r-- | include/bitops.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/bitops.h b/include/bitops.h index e6eaff18c..e283b8355 100644 --- a/include/bitops.h +++ b/include/bitops.h @@ -4,6 +4,22 @@ #include <stdint.h> #include <endian.h> +/* + * Bit map related macros. Usually provided by libc. + */ +#include <sys/param.h> + +#ifndef NBBY +# define NBBY CHAR_BIT +#endif + +#ifndef setbit +# define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) +# define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) +# define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) +# define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) +#endif + #if !defined __BYTE_ORDER || !(__BYTE_ORDER == __LITTLE_ENDIAN) && !(__BYTE_ORDER == __BIG_ENDIAN) #error missing __BYTE_ORDER #endif |