clock.h revision 93835 
1/*-
2 * Copyright (c) 1996 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Gordon W. Ross
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *        This product includes software developed by the NetBSD
19 *        Foundation, Inc. and its contributors.
20 * 4. Neither the name of The NetBSD Foundation nor the names of its
21 *    contributors may be used to endorse or promote products derived
22 *    from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 *
36 *	$NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
37 *
38 * $FreeBSD: head/sys/sys/clock.h 93835 2002-04-04 23:39:10Z tmm $
39 */
40
41#ifndef _SYS_CLOCK_H_
42#define _SYS_CLOCK_H_
43
44/*
45 * Structure to hold the values typically reported by time-of-day clocks.
46 * This can be passed to the generic conversion functions to be converted
47 * to a struct timespec.
48 */
49struct clocktime {
50	int	year;			/* year - 1900 */
51	int	mon;			/* month (1 - 12) */
52	int	day;			/* day (1 - 31) */
53	int	hour;			/* hour (0 - 23) */
54	int	min;			/* minute (0 - 59) */
55	int	sec;			/* second (0 - 59) */
56	int	dow;			/* day of week (0 - 6; 0 = Sunday) */
57	long	nsec;			/* nano seconds */
58};
59
60int clock_ct_to_ts(struct clocktime *, struct timespec *);
61void clock_ts_to_ct(struct timespec *, struct clocktime *);
62void clock_register(device_t, long);
63
64/*
65 * BCD to decimal and decimal to BCD.
66 */
67#define	FROMBCD(x)	(((x) >> 4) * 10 + ((x) & 0xf))
68#define	TOBCD(x)	(((x) / 10 * 16) + ((x) % 10))
69
70/* Some handy constants. */
71#define SECDAY		(24 * 60 * 60)
72#define SECYR		(SECDAY * 365)
73
74/* Traditional POSIX base year */
75#define	POSIX_BASE_YEAR	1970
76
77#endif /* !_SYS_CLOCK_H_ */
78