ISSET
#define ISSET(A, N) ((A)[(N)/BITS_PER_MAP] & (1<<((N)%BITS_PER_MAP)))
#define ISSET(opt) (sp->fts_options & (opt))
#define ISSET(t, f) ((t) & (f))
#define ISSET(t, f) ((t) & (f))
#define ISSET(t, f) ((t) & (f))
#define ISSET(t, f) ((t) & (f))
#define ISSET(t, f) ((t) & (f))