NetBSD/sys/dev/clock_subr.h
gwr d8b59a12b5 Shared functions to convert between year/month/day/hour/minute/second
and "seconds since 1970" (POSIX time_t). See sys/arch/sun3/sun3/clock.c
for an example of how these can be used.
1997-02-19 23:29:28 +00:00

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2.5 KiB
C

/* $NetBSD: clock_subr.h,v 1.1 1997/02/19 23:29:28 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* "POSIX time" to/from "YY/MM/DD/hh/mm/ss"
*/
struct clock_ymdhms {
u_short dt_year;
u_char dt_mon;
u_char dt_day;
u_char dt_wday; /* Day of week */
u_char dt_hour;
u_char dt_min;
u_char dt_sec;
};
time_t clock_ymdhms_to_secs __P((struct clock_ymdhms *));
void clock_secs_to_ymdhms __P((time_t, struct clock_ymdhms *));
/*
* BCD to decimal and decimal to BCD.
*/
#define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
#define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
/* Some handy constants. */
#define SECDAY 86400L
#define SECYR (SECDAY * 365)