tn3270/telnet/Source/fdset.h

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)fdset.h     1.4 (Berkeley) 6/29/88
 */

/*
 * The following is defined just in case someone should want to run
 * this telnet on a 4.2 system.
 *
 */

#ifndef FD_SETSIZE

#define FD_SET(n, p)    ((p)->fds_bits[0] |= (1<<(n)))
#define FD_CLR(n, p)    ((p)->fds_bits[0] &= ~(1<<(n)))
#define FD_ISSET(n, p)  ((p)->fds_bits[0] & (1<<(n)))
#define FD_ZERO(p)      ((p)->fds_bits[0] = 0)

#endif