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/*        $OpenBSD: time.h,v 1.25 2007/05/09 17:42:19 deraadt Exp $        */

/*        $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $        */

/*

 * Copyright (c) 1982, 1986, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.

 *

 *        @(#)time.h        8.2 (Berkeley) 7/10/94

 */

/* Modified for Prex by Kohsuke Ohtani */

#ifndef _RTC_H

#define _RTC_H

#include <sys/cdefs.h>

struct rtc_ops {

        int        (*gettime)(void *aux, struct timeval *tv);

        int        (*settime)(void *aux, struct timeval *tv);

};

/*

 * "POSIX time" to/from "YY/MM/DD/hh/mm/ss"

 */

struct clock_ymdhms {

        u_short                year;

        u_char                mon;

        u_char                day;

        u_char                dow;        /* Day of week */

        u_char                hour;

        u_char                min;

        u_char                sec;

        u_char                nsec;

};

/*

 * BCD to decimal and decimal to BCD.

 */

#define FROMBCD(x)      (u_char)(((x) >> 4) * 10 + ((x) & 0xf))

#define TOBCD(x)        (u_char)(((x) / 10 * 16) + ((x) % 10))

/* Some handy constants. */

#define SECDAY          86400L

#define SECYR           (SECDAY * 365)

/* Traditional POSIX base year */

#define POSIX_BASE_YEAR 1970

__BEGIN_DECLS

time_t        rtc_ymdhms_to_secs(struct clock_ymdhms *dt);

void        rtc_secs_to_ymdhms(time_t secs, struct clock_ymdhms *dt);

void        rtc_attach(struct rtc_ops *ops, void *aux);

__END_DECLS

#endif /* !_RTC_H */