284 lines
6.7 KiB
C
284 lines
6.7 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <efi.h>
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#include <efilib.h>
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#include <time.h>
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#include <sys/time.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 && \
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(((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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/*
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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 const 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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void
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efi_time_init(void)
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{
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}
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void
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efi_time_fini(void)
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{
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}
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void
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to_efi_time(EFI_TIME *efi_time, time_t time)
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{
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int lyear, month;
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time_t seconds;
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if (time >= 0) {
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efi_time->Year = 1970;
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lyear = isleap(efi_time->Year);
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month = 13;
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seconds = CumulativeDays[lyear][month] * SECSPERDAY;
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while (time > seconds) {
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time -= seconds;
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efi_time->Year++;
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lyear = isleap(efi_time->Year);
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seconds = CumulativeDays[lyear][month] * SECSPERDAY;
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}
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efi_time->Month = 0;
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while (time >
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CumulativeDays[lyear][month] * SECSPERDAY) {
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efi_time->Month++;
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}
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month = efi_time->Month - 1;
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time -= CumulativeDays[lyear][month] * SECSPERDAY;
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for (efi_time->Day = 0; time > SECSPERDAY; efi_time->Day++)
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time -= SECSPERDAY;
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for (efi_time->Hour = 0; time > SECSPERHOUR; efi_time->Hour++)
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time -= SECSPERHOUR;
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for (efi_time->Minute = 0; time > 60; efi_time->Minute++)
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time -= 60;
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efi_time->Second = time;
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efi_time->Nanosecond = 0;
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efi_time->TimeZone = 0;
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efi_time->Daylight = 0;
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} else {
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memset(efi_time, 0, sizeof(EFI_TIME));
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}
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}
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time_t
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from_efi_time(EFI_TIME *ETime)
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{
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time_t UTime;
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int Year;
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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 || ETime->Minute > 59 ||
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ETime->Second > 59 || ETime->TimeZone < -1440 ||
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(ETime->TimeZone > 1440 && ETime->TimeZone != 2047)) {
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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] *
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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
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* 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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/*
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* EFI time is repored in local time. Adjust for any time zone
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* offset to get true UT
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*/
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if (ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE) {
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/*
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* TimeZone is kept in minues...
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*/
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UTime += (ETime->TimeZone * 60);
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}
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return (UTime);
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}
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static int
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EFI_GetTimeOfDay(OUT struct timeval *tp, OUT struct timezone *tzp)
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{
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EFI_TIME EfiTime;
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EFI_TIME_CAPABILITIES Capabilities;
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EFI_STATUS Status;
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/*
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* Get time from EFI
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*/
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Status = RS->GetTime(&EfiTime, &Capabilities);
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if (EFI_ERROR(Status))
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return (-1);
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/*
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* Convert to UNIX time (ie seconds since the epoch
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*/
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tp->tv_sec = from_efi_time(&EfiTime);
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tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
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/*
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* Do something with the timezone if needed
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*/
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if (tzp != NULL) {
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if (EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE)
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tzp->tz_minuteswest = 0;
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else
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tzp->tz_minuteswest = EfiTime.TimeZone;
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/*
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* This isn't quit right since it doesn't deal with
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* EFI_TIME_IN_DAYLIGHT
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*/
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tzp->tz_dsttime =
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EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
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}
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return (0);
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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 timeval tv;
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memset(&tv, 0, sizeof(tv));
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EFI_GetTimeOfDay(&tv, NULL);
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if (tloc)
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*tloc = tv.tv_sec;
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return (tv.tv_sec);
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}
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time_t
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getsecs(void)
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{
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return (time(NULL));
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}
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