EmbeddedPkg/TimeBaseLib: Add function to get Week day.

[mirror_edk2.git] / EmbeddedPkg / Library / TimeBaseLib / TimeBaseLib.c

diff --git a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c
index 0c0d9403017c81fd89c33e87e6852f6f7c20235b..5f2bf65fcd11decd947b890bbf0eb9b1428f6d5a 100644 (file)
--- a/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c
+++ b/EmbeddedPkg/Library/TimeBaseLib/TimeBaseLib.c
@@ -77,11 +77,11 @@ EpochToEfiTime (
 }\r
 \r
 /**\r
-  Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC)\r
+  Calculate Epoch days\r
  **/\r
 UINTN\r
 EFIAPI\r
-EfiTimeToEpoch (\r
+EfiGetEpochDays (\r
   IN  EFI_TIME  *Time\r
   )\r
 {\r
@@ -90,7 +90,6 @@ EfiTimeToEpoch (
   UINTN m;\r
   UINTN JulianDate;  // Absolute Julian Date representation of the supplied Time\r
   UINTN EpochDays;   // Number of days elapsed since EPOCH_JULIAN_DAY\r
-  UINTN EpochSeconds;\r
 \r
   a = (14 - Time->Month) / 12 ;\r
   y = Time->Year + 4800 - a;\r
@@ -101,11 +100,44 @@ EfiTimeToEpoch (
   ASSERT (JulianDate >= EPOCH_JULIAN_DATE);\r
   EpochDays = JulianDate - EPOCH_JULIAN_DATE;\r
 \r
+  return EpochDays;\r
+}\r
+/**\r
+  Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC)\r
+ **/\r
+UINTN\r
+EFIAPI\r
+EfiTimeToEpoch (\r
+  IN  EFI_TIME  *Time\r
+  )\r
+{\r
+  UINTN EpochDays;   // Number of days elapsed since EPOCH_JULIAN_DAY\r
+  UINTN EpochSeconds;\r
+\r
+  EpochDays = EfiGetEpochDays (Time);\r
+\r
   EpochSeconds = (EpochDays * SEC_PER_DAY) + ((UINTN)Time->Hour * SEC_PER_HOUR) + (Time->Minute * SEC_PER_MIN) + Time->Second;\r
 \r
   return EpochSeconds;\r
 }\r
 \r
+/**\r
+  returns Day of the week [0-6] 0=Sunday\r
+ **/\r
+UINTN\r
+EfiTimeToWday (\r
+  IN  EFI_TIME  *Time\r
+  )\r
+{\r
+  UINTN EpochDays;   // Number of days elapsed since EPOCH_JULIAN_DAY\r
+\r
+  EpochDays = EfiGetEpochDays (Time);\r
+\r
+  // 4=1/1/1970 was a Thursday\r
+\r
+  return (EpochDays + 4) % 7;\r
+}\r
+\r
 BOOLEAN\r
 EFIAPI\r
 IsLeapYear (\r