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| author | Nhi Pham <nhi@os.amperecomputing.com> | 2021-01-06 23:09:02 +0700 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-01-07 16:43:48 +0000 |
| commit | e31dc4717c75d8e771dfa5c9b1648fa20d88ab0d (patch) | |
| tree | bdbf235236e0f97c791ad02de8b94d2e7a3b81a9 /EmbeddedPkg/Library/TimeBaseLib | |
| parent | ad16388d69c653333275fcb266617d7fa0c24ff4 (diff) | |
| download | edk2-e31dc4717c75d8e771dfa5c9b1648fa20d88ab0d.tar.gz edk2-e31dc4717c75d8e771dfa5c9b1648fa20d88ab0d.tar.bz2 edk2-e31dc4717c75d8e771dfa5c9b1648fa20d88ab0d.zip | |
EmbeddedPkg/TimeBaseLib: Add function to check Timezone and Daylight
This adds two functions IsValidTimeZone() and IsValidDaylight() to check
the time zone and daylight value from EFI time. These functions are
retrieved from the RealTimeClockRuntimeDxe module as they reduce
duplicated code in RTC modules.
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
Diffstat (limited to 'EmbeddedPkg/Library/TimeBaseLib')
| -rw-r--r-- | EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c index 17466c1e6c..210d0b2bf1 100644 --- a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c +++ b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c @@ -211,6 +211,51 @@ IsDayValid ( }
/**
+ 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
+ )
+{
+ return TimeZone == EFI_UNSPECIFIED_TIMEZONE ||
+ (TimeZone >= -1440 && TimeZone <= 1440);
+}
+
+/**
+ 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
+ )
+{
+ return Daylight == 0 ||
+ Daylight == EFI_TIME_ADJUST_DAYLIGHT ||
+ Daylight == (EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT);
+}
+
+/**
Check if the UEFI time is valid.
@param Time The UEFI time to be checked.
@@ -235,8 +280,8 @@ IsTimeValid ( (Time->Minute > 59 ) ||
(Time->Second > 59 ) ||
(Time->Nanosecond > 999999999) ||
- (!((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440)))) ||
- (Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)))) {
+ (!IsValidTimeZone(Time->TimeZone)) ||
+ (!IsValidDaylight(Time->Daylight))) {
return FALSE;
}
|