| 1 | /* $Id: efitime.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - EFI time conversion helpers.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2021-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_TIME
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| 42 | #include <iprt/efi.h>
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| 43 |
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| 44 | #include <iprt/cdefs.h>
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| 45 | #include <iprt/string.h>
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| 46 |
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| 47 |
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| 48 | /*********************************************************************************************************************************
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| 49 | * Defined Constants And Macros *
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| 50 | *********************************************************************************************************************************/
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| 51 |
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| 52 |
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| 53 | /*********************************************************************************************************************************
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| 54 | * Structures and Typedefs *
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| 55 | *********************************************************************************************************************************/
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| 56 |
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| 57 |
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| 58 | /*********************************************************************************************************************************
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| 59 | * Internal Functions *
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| 60 | *********************************************************************************************************************************/
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| 61 |
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| 62 | RTDECL(PRTTIMESPEC) RTEfiTimeToTimeSpec(PRTTIMESPEC pTimeSpec, PCEFI_TIME pEfiTime)
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| 63 | {
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| 64 | RTTIME Time; RT_ZERO(Time);
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| 65 |
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| 66 | Time.i32Year = pEfiTime->u16Year;
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| 67 | Time.u8Month = pEfiTime->u8Month;
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| 68 | Time.u8MonthDay = pEfiTime->u8Day;
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| 69 | Time.u8Hour = pEfiTime->u8Hour;
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| 70 | Time.u8Minute = pEfiTime->u8Minute;
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| 71 | Time.u8Second = pEfiTime->u8Second;
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| 72 | Time.u32Nanosecond = pEfiTime->u32Nanosecond;
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| 73 | if (pEfiTime->iTimezone != EFI_TIME_TIMEZONE_UNSPECIFIED)
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| 74 | Time.offUTC = pEfiTime->iTimezone;
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| 75 | Time.fFlags = RTTIME_FLAGS_TYPE_LOCAL;
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| 76 | if (RTTimeIsLeapYear(Time.i32Year))
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| 77 | Time.fFlags |= RTTIME_FLAGS_LEAP_YEAR;
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| 78 | else
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| 79 | Time.fFlags |= RTTIME_FLAGS_COMMON_YEAR;
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| 80 | if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_ADJUST)
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| 81 | {
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| 82 | if (pEfiTime->u8Daylight & EFI_TIME_DAYLIGHT_INDST)
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| 83 | Time.fFlags |= RTTIME_FLAGS_DST;
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| 84 | }
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| 85 | else
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| 86 | Time.fFlags |= RTTIME_FLAGS_NO_DST_DATA;
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| 87 |
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| 88 | if (!RTTimeLocalNormalize(&Time))
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| 89 | return NULL;
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| 90 |
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| 91 | return RTTimeImplode(pTimeSpec, &Time);
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| 92 | }
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| 93 |
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| 94 |
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| 95 | RTDECL(PEFI_TIME) RTEfiTimeFromTimeSpec(PEFI_TIME pEfiTime, PCRTTIMESPEC pTimeSpec)
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| 96 | {
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| 97 | RTTIME Time; RT_ZERO(Time);
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| 98 | if (!RTTimeExplode(&Time, pTimeSpec))
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| 99 | return NULL;
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| 100 |
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| 101 | RT_ZERO(*pEfiTime);
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| 102 | pEfiTime->u16Year = Time.i32Year < 0
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| 103 | ? 0
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| 104 | : (uint16_t)Time.i32Year;
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| 105 | pEfiTime->u8Month = Time.u8Month;
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| 106 | pEfiTime->u8Day = Time.u8MonthDay;
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| 107 | pEfiTime->u8Hour = Time.u8Hour;
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| 108 | pEfiTime->u8Minute = Time.u8Minute;
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| 109 | pEfiTime->u8Second = Time.u8Second;
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| 110 | pEfiTime->u32Nanosecond = Time.u32Nanosecond;
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| 111 | if ((Time.fFlags & RTTIME_FLAGS_TYPE_MASK) == RTTIME_FLAGS_TYPE_LOCAL)
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| 112 | pEfiTime->iTimezone = Time.offUTC;
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| 113 | else
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| 114 | pEfiTime->iTimezone = EFI_TIME_TIMEZONE_UNSPECIFIED;
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| 115 | if (!(Time.fFlags & RTTIME_FLAGS_NO_DST_DATA))
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| 116 | {
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| 117 | pEfiTime->u8Daylight = EFI_TIME_DAYLIGHT_ADJUST;
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| 118 | if (Time.fFlags & RTTIME_FLAGS_DST)
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| 119 | pEfiTime->u8Daylight |= EFI_TIME_DAYLIGHT_INDST;
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| 120 | }
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| 121 | return pEfiTime;
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| 122 | }
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| 123 |
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