* Copyright (c) 1999, 2000

/* $NetBSD: time.c,v 1.4 2016/08/04 18:07:43 scole Exp $ */

/*-
* Copyright (c) 1999, 2000
* Intel Corporation.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Intel Corporation and
* its contributors.
*
* 4. Neither the name of Intel Corporation or its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION 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 INTEL CORPORATION 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.
*
*/

#include <sys/cdefs.h>
/* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/time.c,v 1.4 2003/04/03 21:36:29 obrien Exp $");
*/
#include <efi.h>
#include <efilib.h>

#include <sys/time.h>

#include <machine/efilib.h>

/*
// Accurate only for the past couple of centuries;
// that will probably do.
//
// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
*/

#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
#define SECSPERHOUR ( 60*60 )
#define SECSPERDAY (24 * SECSPERHOUR)

time_t
EfiTimeToUnixTime(EFI_TIME *ETime)
{
/*
// These arrays give the cumulative number of days up to the first of the
// month number used as the index (1 -> 12) for regular and leap years.
// The value at index 13 is for the whole year.
*/
static time_t CumulativeDays[2][14] = {
{0,
0,
31,
31 + 28,
31 + 28 + 31,
31 + 28 + 31 + 30,
31 + 28 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
{0,
0,
31,
31 + 29,
31 + 29 + 31,
31 + 29 + 31 + 30,
31 + 29 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};

time_t UTime;
int Year;

/*
// Do a santity check
*/
if ( ETime->Year < 1998 || ETime->Year > 2099 ||
ETime->Month == 0 || ETime->Month > 12 ||
ETime->Day == 0 || ETime->Month > 31 ||
ETime->Hour > 23 ||
ETime->Minute > 59 ||
ETime->Second > 59 ||
ETime->TimeZone < -1440 ||
(ETime->TimeZone > 1440 && ETime->TimeZone != 2047) ) {
return (0);
}

/*
// Years
*/
UTime = 0;
for (Year = 1970; Year != ETime->Year; ++Year) {
UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
}

/*
// UTime should now be set to 00:00:00 on Jan 1 of the file's year.
//
// Months
*/
UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);

/*
// UTime should now be set to 00:00:00 on the first of the file's month and year
//
// Days -- Don't count the file's day
*/
UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);

/*
// Hours
*/
UTime += (ETime->Hour * SECSPERHOUR);

/*
// Minutes
*/
UTime += (ETime->Minute * 60);

/*
// Seconds
*/
UTime += ETime->Second;

/*
// EFI time is repored in local time. Adjust for any time zone offset to
// get true UT
*/
if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
/*
// TimeZone is kept in minues...
*/
UTime += (ETime->TimeZone * 60);
}

return UTime;
}

int
EFI_GetTimeOfDay(
OUT struct timeval *tp,
OUT struct timezone *tzp
)
{
EFI_TIME EfiTime;
EFI_TIME_CAPABILITIES Capabilities;
EFI_STATUS Status;

/*
// Get time from EFI
*/

Status = RS->GetTime( &EfiTime, &Capabilities );
if (EFI_ERROR(Status))
return (-1);

/*
// Convert to UNIX time (ie seconds since the epoch
*/

tp->tv_sec = EfiTimeToUnixTime( &EfiTime );
tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */

/*
// Do something with the timezone if needed
*/

if (tzp) {
tzp->tz_minuteswest =
EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone;
/*
// This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT
*/
tzp->tz_dsttime =
EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
}

return (0);
}

time_t
time(time_t *tloc)
{
struct timeval tv;
EFI_GetTimeOfDay(&tv, 0);

if (tloc)
*tloc = tv.tv_sec;
return tv.tv_sec;
}

time_t
getsecs(void)
{
return time(0);
}