MdeModulePkg/HiiDB: Share default if some default value are not specified

Add a new implementation policy of getting default value in HiiDatabase.
The new policy is only for the situation that a question has default
value but doesn't have default value for all supported default type.
In this case, we will choose the smallest default id from the existing
defaults, and share its value to other default id which has no
default value.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabase.h b/MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabase.h
index d90bc0290d..1b0f7f6b37 100644
--- a/MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabase.h
+++ b/MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabase.h
@@ -87,6 +87,8 @@ typedef struct {
 //

 typedef enum {

   DefaultValueFromDefault = 0,     // Get from the minimum or first one when not set default value.

+  DefaultValueFromOtherDefault,    // Get default vale from other default when no default(When other

+                                   // defaults are more than one, use the default with smallest default id).

   DefaultValueFromFlag,            // Get default value from the defalut flag.

   DefaultValueFromOpcode           // Get default value from default opcode, highest priority.

 } DEFAULT_VALUE_TYPE;