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/** @file
*
* Copyright (c) 2016, Hisilicon Limited. All rights reserved.
* Copyright (c) 2016-2019, Linaro Limited. All rights reserved.
* Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#ifndef _TIME_BASE_LIB_H_
#define _TIME_BASE_LIB_H_
#include <Uefi/UefiBaseType.h>
//
// Convenience macros to obtain a build date
//
// These macros should work for any compiler that follows ISO/IEC 9899,
// in which case __DATE__ is defined as a "Mmm dd yyyy" 11 chars string,
// but add an explicit filter for compilers that have been validated.
//
#if (defined (__GNUC__) || defined (_MSC_VER) || defined (__clang__))
#define TIME_BUILD_YEAR (__DATE__[7] == '?' ? 1900\
: (((__DATE__[7] - '0') * 1000 ) \
+ (__DATE__[8] - '0') * 100 \
+ (__DATE__[9] - '0') * 10 \
+ __DATE__[10] - '0'))
#define TIME_BUILD_MONTH ( __DATE__ [2] == '?' ? 1 \
: __DATE__ [2] == 'n' ? ( \
__DATE__ [1] == 'a' ? 1 : 6) \
: __DATE__ [2] == 'b' ? 2 \
: __DATE__ [2] == 'r' ? ( \
__DATE__ [0] == 'M' ? 3 : 4) \
: __DATE__ [2] == 'y' ? 5 \
: __DATE__ [2] == 'l' ? 7 \
: __DATE__ [2] == 'g' ? 8 \
: __DATE__ [2] == 'p' ? 9 \
: __DATE__ [2] == 't' ? 10 \
: __DATE__ [2] == 'v' ? 11 \
: 12)
#define TIME_BUILD_DAY ( __DATE__[4] == '?' ? 1 \
: ((__DATE__[4] == ' ' ? 0 : \
((__DATE__[4] - '0') * 10)) \
+ __DATE__[5] - '0'))
#endif
// Define EPOCH (1970-JANUARY-01) in the Julian Date representation
#define EPOCH_JULIAN_DATE 2440588
// Seconds per unit
#define SEC_PER_MIN ((UINTN) 60)
#define SEC_PER_HOUR ((UINTN) 3600)
#define SEC_PER_DAY ((UINTN) 86400)
/**
Check if it is a leap year.
@param Time The UEFI time to be checked.
@retval TRUE It is a leap year.
@retval FALSE It is NOT a leap year.
**/
BOOLEAN
EFIAPI
IsLeapYear (
IN EFI_TIME *Time
);
/**
Check if the day in the UEFI time is valid.
@param Time The UEFI time to be checked.
@retval TRUE Valid.
@retval FALSE Invalid.
**/
BOOLEAN
EFIAPI
IsDayValid (
IN EFI_TIME *Time
);
/**
Check if the time zone is valid.
Valid values are between -1440 and 1440 or 2047 (EFI_UNSPECIFIED_TIMEZONE).
@param TimeZone The time zone to be checked.
@retval TRUE Valid.
@retval FALSE Invalid.
**/
BOOLEAN
EFIAPI
IsValidTimeZone (
IN INT16 TimeZone
);
/**
Check if the daylight is valid.
Valid values are:
0 : Time is not affected.
1 : Time is affected, and has not been adjusted for daylight savings.
3 : Time is affected, and has been adjusted for daylight savings.
All other values are invalid.
@param Daylight The daylight to be checked.
@retval TRUE Valid.
@retval FALSE Invalid.
**/
BOOLEAN
EFIAPI
IsValidDaylight (
IN INT8 Daylight
);
/**
Check if the UEFI time is valid.
@param Time The UEFI time to be checked.
@retval TRUE Valid.
@retval FALSE Invalid.
**/
BOOLEAN
EFIAPI
IsTimeValid (
IN EFI_TIME *Time
);
/**
Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME.
@param EpochSeconds Epoch seconds.
@param Time The time converted to UEFI format.
**/
VOID
EFIAPI
EpochToEfiTime (
IN UINTN EpochSeconds,
OUT EFI_TIME *Time
);
/**
Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC).
@param Time The UEFI time to be converted.
@return Number of seconds.
**/
UINTN
EFIAPI
EfiTimeToEpoch (
IN EFI_TIME *Time
);
/**
Get the day of the week from the UEFI time.
@param Time The UEFI time to be calculated.
@return The day of the week: Sunday=0, Monday=1, ... Saturday=6
**/
UINTN
EfiTimeToWday (
IN EFI_TIME *Time
);
#endif
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