#ifndef _BITS_SYS_SELECT_H
#define _BITS_SYS_SELECT_H

// from musl license MIT {
#define FD_SETSIZE 1024

typedef unsigned long fd_mask;

typedef struct {
	unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)];
} fd_set;

#define FD_ZERO(s) do { int __i; unsigned long *__b=(s)->fds_bits; for(__i=sizeof (fd_set)/sizeof (long); __i; __i--) *__b++=0; } while(0)
#define FD_SET(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long)))))
#define FD_CLR(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long)))))
#define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long)))))

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define NFDBITS (8*(int)sizeof(long))
#endif
// } from musl license MIT

#endif