#ifndef _YGGDRASIL_SYS_SELECT_H
#define _YGGDRASIL_SYS_SELECT_H 1

#define __FD_INDEX(fd)      ((fd) / sizeof(uint64_t))
#define __FD_BIT(fd)        ((fd) % sizeof(uint64_t))

#define FD_CLR(fd, set)     ((set)->bits[__FD_INDEX(fd)] &= ~(1 << __FD_BIT(fd)))
#define FD_ISSET(fd, set)   (((set)->bits[__FD_INDEX(fd)] & (1 << __FD_BIT(fd))) != 0)
#define FD_SET(fd, set)     ((set)->bits[__FD_INDEX(fd)] |= (1 << __FD_BIT(fd)))
#define FD_ZERO(set)        ((void) memset((set)->bits, 0, sizeof((set)->bits)))

#endif