unrb
CTASSERT(sizeof(struct unr) == sizeof(struct unrb));
#define NBITS ((int)sizeof(((struct unrb *)NULL)->map) * 8)
struct unrb *ub;
struct unrb *ub, *ubf;
struct unrb *ub;
struct unrb *ub;
struct unrb *ub;
struct unrb *ub;
fprintf(stderr, "sizeof(struct unrb) %d\n", sizeof (struct unrb));