1. Update the implementation of HII ConfigRouting Protocol in HiiDataBase module to follow new ECRs.

1) ConfigRouting Protocol ExtractConfig interface must return the default values built in IFR that were not returned by ConfigAccess.ExtractConfig.
  2) The parameters of ConfigRouting Protocol interfaces are clarified to the specific configuration string syntax.
2. Implement the last two HiiLib interfaces: HiiSetToDefaults and HiiValidateSettings.
3. Update DriverSample driver to use these two APIs.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8313 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Include/Library/HiiLib.h

@@ -285,6 +285,51 @@ HiiConstructConfigHdr (
   IN EFI_HANDLE      DriverHandle
   );
 
+/**
+  It has the many same logic to HiiValidateSetting API.
+
+  Reset the default value specified by DefaultId to the driver
+  configuration got by Request string. 
+  NULL request string support depends on the ExtractConfig interface of
+  HiiConfigRouting protocol in UEFI specification.
+  
+  @param EFI_STRING  Request    A null-terminated Unicode string in 
+                                <MultiConfigRequest> format. It can be NULL.
+                                If it is NULL, all configuration for the
+                                entirety of the current HII database will be reset.
+  @param UINT16      DefaultId  Specifies the type of defaults to retrieve.
+  
+  @retval TURE    The default value is set successfully.
+  @retval FALSE   The default value can't be found and set.
+**/
+BOOLEAN
+EFIAPI                               
+HiiSetToDefaults (     
+  IN CONST EFI_STRING	Request,  OPTIONAL
+  IN UINT16				    DefaultId
+  );
+
+/**
+  Validate the current configuration by parsing HII form IFR opcode.
+  It can share the most logic with HiiSetToDefaults.
+
+  NULL request string support depends on the ExtractConfig interface of
+  HiiConfigRouting protocol in UEFI specification.
+  
+  @param EFI_STRING  Request    A null-terminated Unicode string in 
+                                <MultiConfigRequest> format. It can be NULL.
+                                If it is NULL, all current configuration for the
+                                entirety of the current HII database will be validated.
+  
+  @retval TURE    Current configuration is valid.
+  @retval FALSE   Current configuration is invalid.
+**/
+BOOLEAN
+EFIAPI                               
+HiiValidateSettings (
+  IN CONST EFI_STRING	Request  OPTIONAL
+  );
+
 /**
   Allocates and returns a Null-terminated Unicode <ConfigAltResp> string.