178 lines
4.9 KiB
C
178 lines
4.9 KiB
C
/*
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* Copyright (c) 1999, 2000
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* Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by Intel Corporation and
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* its contributors.
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*
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* 4. Neither the name of Intel Corporation or its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <time.h>
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#include <sys/time.h>
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#include <stand.h>
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#include "libski.h"
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/*
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// Accurate only for the past couple of centuries;
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// that will probably do.
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//
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// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
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*/
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#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
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#define SECSPERHOUR ( 60*60 )
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#define SECSPERDAY (24 * SECSPERHOUR)
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struct ssc_time {
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int Year;
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int Month;
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int Day;
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int Hour;
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int Minute;
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int Second;
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int Msec;
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int Wday;
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};
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time_t
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EfiTimeToUnixTime(struct ssc_time *ETime)
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{
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/*
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// These arrays give the cumulative number of days up to the first of the
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// month number used as the index (1 -> 12) for regular and leap years.
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// The value at index 13 is for the whole year.
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*/
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static time_t CumulativeDays[2][14] = {
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{0,
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0,
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31,
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31 + 28,
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31 + 28 + 31,
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31 + 28 + 31 + 30,
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31 + 28 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
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{0,
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0,
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31,
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31 + 29,
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31 + 29 + 31,
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31 + 29 + 31 + 30,
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31 + 29 + 31 + 30 + 31,
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31 + 29 + 31 + 30 + 31 + 30,
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31 + 29 + 31 + 30 + 31 + 30 + 31,
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
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31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
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time_t UTime;
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int Year;
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ETime->Year += 1900;
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/*
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// Do a santity check
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*/
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if ( ETime->Year < 1998 || ETime->Year > 2099 ||
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ETime->Month == 0 || ETime->Month > 12 ||
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ETime->Day == 0 || ETime->Month > 31 ||
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ETime->Hour > 23 ||
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ETime->Minute > 59 ||
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ETime->Second > 59 ) {
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return (0);
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}
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/*
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// Years
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*/
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UTime = 0;
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for (Year = 1970; Year != ETime->Year; ++Year) {
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UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
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}
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/*
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// UTime should now be set to 00:00:00 on Jan 1 of the file's year.
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//
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// Months
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*/
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UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);
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/*
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// UTime should now be set to 00:00:00 on the first of the file's month and year
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//
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// Days -- Don't count the file's day
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*/
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UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
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/*
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// Hours
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*/
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UTime += (ETime->Hour * SECSPERHOUR);
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/*
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// Minutes
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*/
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UTime += (ETime->Minute * 60);
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/*
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// Seconds
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*/
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UTime += ETime->Second;
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return UTime;
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}
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time_t
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time(time_t *tloc)
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{
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struct ssc_time time;
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ssc((u_int64_t) &time, 0, 0, 0, SSC_GET_RTC);
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return *tloc = EfiTimeToUnixTime(&time);
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}
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