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    Length: 4567 (0x11d7)
    Types: TextFile
    Notes: UNIX file
    Names: »fd.h«

└─⟦e2256280a⟧ Bits:30004636/disk3.imd INTERACTIVE Motif Environment Development System
└─⟦e2256280a⟧ UNIX Filesystem
└─⟦e2256280a⟧ UNIX Filesystem
    └─⟦this⟧ »xt/new/usr/include/X11/fd.h« 

TextFile

#ifdef REV_INFO
#ifndef lint
static char SCCSID[] = "OSF/Motif: @(#)fd.h	1.1 - 89/08/31 - 09:14:25";
#endif /* lint */
#endif /* REV_INFO */
/******************************************************************************
*******************************************************************************
*
*  (c) Copyright 1989, OPEN SOFTWARE FOUNDATION, INC.
*  (c) Copyright 1989, DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
*  (c) Copyright 1987, 1988, 1989 HEWLETT-PACKARD COMPANY
*  (c) Copyright 1988 MASSACHUSETTS INSTITUTE OF TECHNOLOGY 
*  ALL RIGHTS RESERVED
*  
*  	THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED
*  AND COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND
*  WITH THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR
*  ANY OTHER COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE
*  AVAILABLE TO ANY OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF THE
*  SOFTWARE IS HEREBY TRANSFERRED.
*  
*  	THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT
*  NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY OPEN SOFTWARE
*  FOUNDATION, INC. OR ITS THIRD PARTY SUPPLIERS  
*  
*  	OPEN SOFTWARE FOUNDATION, INC. AND ITS THIRD PARTY SUPPLIERS,
*  ASSUME NO RESPONSIBILITY FOR THE USE OR INABILITY TO USE ANY OF ITS
*  SOFTWARE .   OSF SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
*  KIND, AND OSF EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES, INCLUDING
*  BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
*  FITNESS FOR A PARTICULAR PURPOSE.
*  
*  Notice:  Notwithstanding any other lease or license that may pertain to,
*  or accompany the delivery of, this computer software, the rights of the
*  Government regarding its use, reproduction and disclosure are as set
*  forth in Section 52.227-19 of the FARS Computer Software-Restricted
*  Rights clause.
*  
*  (c) Copyright 1989, Open Software Foundation, Inc.  Unpublished - all
*  rights reserved under the Copyright laws of the United States.
*  
*  RESTRICTED RIGHTS NOTICE:  Use, duplication, or disclosure by the
*  Government is subject to the restrictions as set forth in subparagraph
*  (c)(1)(ii) of the Rights in Technical Data and Computer Software clause
*  at DFARS 52.227-7013.
*  
*  Open Software Foundation, Inc.
*  11 Cambridge Center
*  Cambridge, MA   02142
*  (617)621-8700
*  
*  RESTRICTED RIGHTS LEGEND:  This computer software is submitted with
*  "restricted rights."  Use, duplication or disclosure is subject to the
*  restrictions as set forth in NASA FAR SUP 18-52.227-79 (April 1985)
*  "Commercial Computer Software- Restricted Rights (April 1985)."  Open
*  Software Foundation, Inc., 11 Cambridge Center, Cambridge, MA  02142.  If
*  the contract contains the Clause at 18-52.227-74 "Rights in Data General"
*  then the "Alternate III" clause applies.
*  
*  (c) Copyright 1989, Open Software Foundation, Inc.
*  ALL RIGHTS RESERVED 
*  
*  
* Open Software Foundation is a trademark of The Open Software Foundation, Inc.
* OSF is a trademark of Open Software Foundation, Inc.
* OSF/Motif is a trademark of Open Software Foundation, Inc.
* Motif is a trademark of Open Software Foundation, Inc.
* DEC is a registered trademark of Digital Equipment Corporation
* DIGITAL is a registered trademark of Digital Equipment Corporation
* X Window System is a trademark of the Massachusetts Institute of Technology
*
*******************************************************************************
******************************************************************************/

#ifndef __fd_set
#define __fd_set
#ifndef NBBY
#define	NBBY	8		/* number of bits in a byte */
#endif
/*
 * Select uses bit masks of file descriptors in longs.
 * These macros manipulate such bit fields (the filesystem macros use chars).
 * FD_SETSIZE may be defined by the user, but the default here
 * should be >= NOFILE (param.h).
 */
#ifndef	FD_SETSIZE
#define	FD_SETSIZE	256
#endif

typedef long Fd_mask;
#ifndef NFDBITS
#define NFDBITS	(sizeof(Fd_mask) * NBBY)	/* bits per mask */
#endif
#ifndef howmany
#define	howmany(x, y)	(((x)+((y)-1))/(y))
#endif

typedef	struct Fd_set {
	Fd_mask	fds_bits[howmany(FD_SETSIZE, NFDBITS)];
} Fd_set;

#ifndef FD_SET
#define	FD_SET(n, p)	((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#endif
#ifndef FD_CLR
#define	FD_CLR(n, p)	((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#endif
#ifndef FD_ISSET
#define	FD_ISSET(n, p)	((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#endif
#ifndef FD_ZERO
#define FD_ZERO(p)	bzero((char *)(p), sizeof(*(p)))
#endif
#endif