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/* $Id: efitime.cpp $ */
/** @file
* IPRT - EFI time conversion helpers.
*/
/*
* Copyright (C) 2021-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_TIME
#include <iprt/efi.h>
#include <iprt/cdefs.h>
#include <iprt/string.h>
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
RTDECL(PRTTIMESPEC) RTEfiTimeToTimeSpec(PRTTIMESPEC pTimeSpec, PCEFI_TIME pEfiTime)
{
RTTIME Time; RT_ZERO(Time);
Time.i32Year = pEfiTime->u16Year;
Time.u8Month = pEfiTime->u8Month;
Time.u8MonthDay = pEfiTime->u8Day;
Time.u8Hour = pEfiTime->u8Hour;
Time.u8Minute = pEfiTime->u8Minute;
Time.u8Second = pEfiTime->u8Second;
Time.u32Nanosecond = pEfiTime->u32Nanosecond;
if (pEfiTime->iTimezone != EFI_TIME_TIMEZONE_UNSPECIFIED)
Time.offUTC = pEfiTime->iTimezone;
Time.fFlags = RTTIME_FLAGS_TYPE_LOCAL;
if (RTTimeIsLeapYear(Time.i32Year))
Time.fFlags |= RTTIME_FLAGS_LEAP_YEAR;
else
Time.fFlags |= RTTIME_FLAGS_COMMON_YEAR;
if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_ADJUST)
{
if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_INDST)
Time.fFlags |= RTTIME_FLAGS_DST;
}
else
Time.fFlags |= RTTIME_FLAGS_NO_DST_DATA;
if (!RTTimeLocalNormalize(&Time))
return NULL;
return RTTimeImplode(pTimeSpec, &Time);
}
RTDECL(PEFI_TIME) RTEfiTimeFromTimeSpec(PEFI_TIME pEfiTime, PCRTTIMESPEC pTimeSpec)
{
RTTIME Time; RT_ZERO(Time);
if (!RTTimeExplode(&Time, pTimeSpec))
return NULL;
RT_ZERO(*pEfiTime);
pEfiTime->u16Year = Time.i32Year < 0
? 0
: (uint16_t)Time.i32Year;
pEfiTime->u8Month = Time.u8Month;
pEfiTime->u8Day = Time.u8MonthDay;
pEfiTime->u8Hour = Time.u8Hour;
pEfiTime->u8Minute = Time.u8Minute;
pEfiTime->u8Second = Time.u8Second;
pEfiTime->u32Nanosecond = Time.u32Nanosecond;
if ((Time.fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL)
pEfiTime->iTimezone = Time.offUTC;
else
pEfiTime->iTimezone = EFI_TIME_TIMEZONE_UNSPECIFIED;
if (!(Time.fFlags & RTTIME_FLAGS_NO_DST_DATA))
{
pEfiTime->u8Daylight = EFI_TIME_DAYLIGHT_ADJUST;
if (Time.fFlags & RTTIME_FLAGS_DST)
pEfiTime->u8Daylight |= EFI_TIME_DAYLIGHT_INDST;
}
return pEfiTime;
}
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