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/** @file
C Run-Time Libraries (CRT) Time Management Routines Wrapper Implementation
for MbedTLS-based Cryptographic Library (used in DXE & RUNTIME).
Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
typedef int time_t;
//
// Structures Definitions
//
struct tm {
int tm_sec; /* seconds after the minute [0-60] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Savings Time flag */
long tm_gmtoff; /* offset from CUT in seconds */
char *tm_zone; /* timezone abbreviation */
};
//
// -- Time Management Routines --
//
#define IsLeap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
#define SECSPERMIN (60)
#define SECSPERHOUR (60 * 60)
#define SECSPERDAY (24 * SECSPERHOUR)
//
// The arrays give the cumulative number of days up to the first of the
// month number used as the index (1 -> 12) for regular and leap years.
// The value at index 13 is for the whole year.
//
UINTN CumulativeDays[2][14] = {
{
0,
0,
31,
31 + 28,
31 + 28 + 31,
31 + 28 + 31 + 30,
31 + 28 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
},
{
0,
0,
31,
31 + 29,
31 + 29 + 31,
31 + 29 + 31 + 30,
31 + 29 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
}
};
/** Get the system time as seconds elapsed since midnight, January 1, 1970. **/
time_t
time (
time_t *timer
)
{
EFI_STATUS Status;
EFI_TIME Time;
time_t CalTime;
UINTN Year;
//
// Get the current time and date information
//
Status = gRT->GetTime (&Time, NULL);
if (EFI_ERROR (Status) || (Time.Year < 1970)) {
return 0;
}
//
// Years Handling
// UTime should now be set to 00:00:00 on Jan 1 of the current year.
//
for (Year = 1970, CalTime = 0; Year != Time.Year; Year++) {
CalTime = CalTime + (time_t)(CumulativeDays[IsLeap (Year)][13] * SECSPERDAY);
}
//
// Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment
//
CalTime = CalTime +
(time_t)((Time.TimeZone != EFI_UNSPECIFIED_TIMEZONE) ? (Time.TimeZone * 60) : 0) +
(time_t)(CumulativeDays[IsLeap (Time.Year)][Time.Month] * SECSPERDAY) +
(time_t)(((Time.Day > 0) ? Time.Day - 1 : 0) * SECSPERDAY) +
(time_t)(Time.Hour * SECSPERHOUR) +
(time_t)(Time.Minute * 60) +
(time_t)Time.Second;
if (timer != NULL) {
*timer = CalTime;
}
return CalTime;
}
/** Convert a time value from type time_t to struct tm. **/
struct tm *
gmtime (
const time_t *timer
)
{
struct tm *GmTime;
UINT16 DayNo;
UINT16 DayRemainder;
time_t Year;
time_t YearNo;
UINT16 TotalDays;
UINT16 MonthNo;
if (timer == NULL) {
return NULL;
}
GmTime = AllocateZeroPool (sizeof (struct tm));
if (GmTime == NULL) {
return NULL;
}
ZeroMem ((VOID *)GmTime, (UINTN)sizeof (struct tm));
DayNo = (UINT16)(*timer / SECSPERDAY);
DayRemainder = (UINT16)(*timer % SECSPERDAY);
GmTime->tm_sec = (int)(DayRemainder % SECSPERMIN);
GmTime->tm_min = (int)((DayRemainder % SECSPERHOUR) / SECSPERMIN);
GmTime->tm_hour = (int)(DayRemainder / SECSPERHOUR);
GmTime->tm_wday = (int)((DayNo + 4) % 7);
for (Year = 1970, YearNo = 0; DayNo > 0; Year++) {
TotalDays = (UINT16)(IsLeap (Year) ? 366 : 365);
if (DayNo >= TotalDays) {
DayNo = (UINT16)(DayNo - TotalDays);
YearNo++;
} else {
break;
}
}
GmTime->tm_year = (int)(YearNo + (1970 - 1900));
GmTime->tm_yday = (int)DayNo;
for (MonthNo = 12; MonthNo > 1; MonthNo--) {
if (DayNo >= CumulativeDays[IsLeap (Year)][MonthNo]) {
DayNo = (UINT16)(DayNo - (UINT16)(CumulativeDays[IsLeap (Year)][MonthNo]));
break;
}
}
GmTime->tm_mon = (int)MonthNo - 1;
GmTime->tm_mday = (int)DayNo + 1;
GmTime->tm_isdst = 0;
GmTime->tm_gmtoff = 0;
GmTime->tm_zone = NULL;
return GmTime;
}
/**_time64 function. **/
time_t
_time64 (
time_t *t
)
{
return time (t);
}
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