+/**\r
+ Get the actual number of entries in EFI_KEY_OPTION.Keys, from 0-3.\r
+\r
+ @param KeyOption Pointer to the EFI_KEY_OPTION structure. \r
+\r
+ @return Actual number of entries in EFI_KEY_OPTION.Keys.\r
+**/\r
+#define KEY_OPTION_INPUT_KEY_COUNT(KeyOption) \\r
+ (((KeyOption)->KeyData & EFI_KEY_OPTION_INPUT_KEY_COUNT_MASK) >> LowBitSet32 (EFI_KEY_OPTION_INPUT_KEY_COUNT_MASK))\r
+\r