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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
bsd_type.h.h
Abstract:
This module contains definitions for BSD compatibility for
STREAMS drivers.
Author:
Eric Chin (ericc) July 18, 1991
Revision History:
--*/
/*************************************************************************
*
* SpiderTCP/SNMP
*
* Copyright 1990 Spider Systems Limited
*
* BSD_TYPES.H
*
* some #defines for BSD compatibility
*
*
*************************************************************************/
/*
* /usr/projects/spare/PBRAIN/SCCS/pbrainG/dev/src/include/sys/snet/0/s.bsd_types.h
* @(#)bsd_types.h 1.3
*
* Last delta created 11:54:01 10/16/90
* This file extracted 08:53:46 7/10/91
*
* Modifications:
*
* GSS 01/03/90 put in Pbrain
*/
#ifndef _SYS_SNET_BSD_TYPE_
#define _SYS_SNET_BSD_TYPE_
#ifndef u_char
#define u_char unsigned char
#define u_short unsigned short
#define u_long unsigned long
#define u_int unsigned int
#endif
/*
* Select uses bit masks of file descriptors in integers.
* 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). In the current implementation it should
* not exceed 32 (sizeof int).
*/
#ifndef FD_SETSIZE
#define FD_SETSIZE 32
#endif
/* number of bits in a byte */
#define NBBY 8
typedef int fd_mask;
#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
#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;
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
#endif /* _SYS_SNET_BSD_TYPE_ */
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