isclr
#define isclr(a,i) \
#define isclr(a, i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
#define isclr(a, i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
#define isclr(a, i) (!((a)[(i)/NBBY] & (1 << ((i)%NBBY))))
#define isclr(a, i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)