2 C Run-Time Libraries (CRT) Time Management Routines Wrapper Implementation
3 for OpenSSL-based Cryptographic Library (used in DXE & RUNTIME).
5 Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
6 SPDX-License-Identifier: BSD-2-Clause-Patent
11 #include <CrtLibSupport.h>
12 #include <Library/UefiRuntimeServicesTableLib.h>
15 // -- Time Management Routines --
18 #define SECSPERMIN (60)
19 #define SECSPERHOUR (60 * 60)
20 #define SECSPERDAY (24 * SECSPERHOUR)
23 // The arrays give the cumulative number of days up to the first of the
24 // month number used as the index (1 -> 12) for regular and leap years.
25 // The value at index 13 is for the whole year.
27 UINTN CumulativeDays
[2][14] = {
35 31 + 28 + 31 + 30 + 31,
36 31 + 28 + 31 + 30 + 31 + 30,
37 31 + 28 + 31 + 30 + 31 + 30 + 31,
38 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
39 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
40 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
41 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
42 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
51 31 + 29 + 31 + 30 + 31,
52 31 + 29 + 31 + 30 + 31 + 30,
53 31 + 29 + 31 + 30 + 31 + 30 + 31,
54 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
55 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
56 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
57 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
58 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
62 /* Check the year is leap or not. */
75 DivS64x64Remainder (timer
, 4, &Remainder1
);
76 DivS64x64Remainder (timer
, 100, &Remainder2
);
77 DivS64x64Remainder (timer
, 400, &Remainder3
);
79 return (Remainder1
== 0 && (Remainder2
!= 0 || Remainder3
== 0));
82 /* Get the system time as seconds elapsed since midnight, January 1, 1970. */
97 // Get the current time and date information
99 Status
= gRT
->GetTime (&Time
, NULL
);
100 if (EFI_ERROR (Status
) || (Time
.Year
< 1970)) {
106 // UTime should now be set to 00:00:00 on Jan 1 of the current year.
108 for (Year
= 1970, CalTime
= 0; Year
!= Time
.Year
; Year
++) {
109 CalTime
= CalTime
+ (time_t)(CumulativeDays
[IsLeap (Year
)][13] * SECSPERDAY
);
113 // Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment
116 (time_t)((Time
.TimeZone
!= EFI_UNSPECIFIED_TIMEZONE
) ? (Time
.TimeZone
* 60) : 0) +
117 (time_t)(CumulativeDays
[IsLeap (Time
.Year
)][Time
.Month
] * SECSPERDAY
) +
118 (time_t)(((Time
.Day
> 0) ? Time
.Day
- 1 : 0) * SECSPERDAY
) +
119 (time_t)(Time
.Hour
* SECSPERHOUR
) +
120 (time_t)(Time
.Minute
* 60) +
131 // Convert a time value from type time_t to struct tm.
151 GmTime
= malloc (sizeof (struct tm
));
152 if (GmTime
== NULL
) {
156 ZeroMem ((VOID
*)GmTime
, (UINTN
)sizeof (struct tm
));
158 DayNo
= (UINT64
)DivS64x64Remainder (*timer
, SECSPERDAY
, &Remainder
);
159 DayRemainder
= (UINT64
)Remainder
;
161 DivS64x64Remainder (DayRemainder
, SECSPERMIN
, &Remainder
);
162 GmTime
->tm_sec
= (int)Remainder
;
163 DivS64x64Remainder (DayRemainder
, SECSPERHOUR
, &Remainder
);
164 GmTime
->tm_min
= (int)DivS64x64Remainder (Remainder
, SECSPERMIN
, NULL
);
165 GmTime
->tm_hour
= (int)DivS64x64Remainder (DayRemainder
, SECSPERHOUR
, NULL
);
166 DivS64x64Remainder ((DayNo
+ 4), 7, &Remainder
);
167 GmTime
->tm_wday
= (int)Remainder
;
169 for (Year
= 1970, YearNo
= 0; DayNo
> 0; Year
++) {
170 TotalDays
= (UINT32
)(IsLeap (Year
) ? 366 : 365);
171 if (DayNo
>= TotalDays
) {
172 DayNo
= (UINT64
)(DayNo
- TotalDays
);
179 GmTime
->tm_year
= (int)(YearNo
+ (1970 - 1900));
180 GmTime
->tm_yday
= (int)DayNo
;
182 for (MonthNo
= 12; MonthNo
> 1; MonthNo
--) {
183 if (DayNo
>= CumulativeDays
[IsLeap (Year
)][MonthNo
]) {
184 DayNo
= (UINT64
)(DayNo
- (UINT32
)(CumulativeDays
[IsLeap (Year
)][MonthNo
]));
189 GmTime
->tm_mon
= (int)MonthNo
- 1;
190 GmTime
->tm_mday
= (int)DayNo
+ 1;
192 GmTime
->tm_isdst
= 0;
193 GmTime
->tm_gmtoff
= 0;
194 GmTime
->tm_zone
= NULL
;