Add GetCurrentLanguage() to HiiLib in MdeModulePkg

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6758 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Include/Library/HiiLib.h

@@ -497,4 +497,26 @@ Rfc3066ToIso639 (
   CHAR8  *SupportedLanguages
   );
 
+
+/**
+  Determine what is the current language setting. The space reserved for Lang
+  must be at least RFC_3066_ENTRY_SIZE bytes;
+
+  If Lang is NULL, then ASSERT.
+
+  @param  Lang                   Pointer of system language. Lang will always be filled with 
+                                         a valid RFC 3066 language string. If "PlatformLang" is not
+                                         set in the system, the default language specifed by PcdUefiVariableDefaultPlatformLang
+                                         is returned.
+
+  @return  EFI_SUCCESS     If the EFI Variable with "PlatformLang" is set and return in Lang.
+  @return  EFI_NOT_FOUND If the EFI Variable with "PlatformLang" is not set, but a valid default language is return in Lang.
+
+**/
+EFI_STATUS
+EFIAPI
+GetCurrentLanguage (
+  OUT     CHAR8               *Lang
+  );
+
 #endif

MdeModulePkg/Library/UefiHiiLib/HiiLanguage.c

@@ -204,3 +204,50 @@ HiiLibGetSupportedSecondaryLanguages (
 }
 
 
+/**
+  Determine what is the current language setting. The space reserved for Lang
+  must be at least RFC_3066_ENTRY_SIZE bytes;
+
+  If Lang is NULL, then ASSERT.
+
+  @param  Lang                   Pointer of system language. Lang will always be filled with 
+                                 a valid RFC 3066 language string. If "PlatformLang" is not
+                                 set in the system, the default language specifed by PcdUefiVariableDefaultPlatformLang
+                                 is returned.
+
+  @return  EFI_SUCCESS     If the EFI Variable with "PlatformLang" is set and return in Lang.
+  @return  EFI_NOT_FOUND If the EFI Variable with "PlatformLang" is not set, but a valid default language is return in Lang.
+
+**/
+EFI_STATUS
+EFIAPI
+GetCurrentLanguage (
+  OUT     CHAR8               *Lang
+  )
+{
+  EFI_STATUS  Status;
+  UINTN       Size;
+
+  ASSERT (Lang != NULL);
+
+  //
+  // Get current language setting
+  //
+  Size = RFC_3066_ENTRY_SIZE;
+  Status = gRT->GetVariable (
+                  L"PlatformLang",
+                  &gEfiGlobalVariableGuid,
+                  NULL,
+                  &Size,
+                  Lang
+                  );
+
+  if (EFI_ERROR (Status)) {
+    AsciiStrCpy (Lang, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang));
+  }
+
+  return Status;
+}
+
+
+

MdeModulePkg/Library/UefiHiiLib/InternalHiiLib.h

@@ -21,6 +21,8 @@
 #include <Protocol/HiiString.h>
 #include <Protocol/DevicePath.h>
 
+#include <Guid/GlobalVariable.h>
+
 #include <Library/BaseLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/HiiLib.h>
@@ -29,6 +31,8 @@
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/DevicePathLib.h>
 #include <Library/UefiLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
 
 #define HII_LIB_DEFAULT_STRING_SIZE     0x200
 

MdeModulePkg/Library/UefiHiiLib/UefiHiiLib.inf

@@ -48,12 +48,20 @@
   UefiBootServicesTableLib
   DevicePathLib
   UefiLib
+  PcdLib
+  UefiRuntimeServicesTableLib
 
 [Protocols]
   gEfiHiiDatabaseProtocolGuid  # ALWAYS_CONSUMED
   gEfiHiiStringProtocolGuid    # ALWAYS_CONSUMED
   gEfiDevicePathProtocolGuid  
 
+[Pcd]
+  gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultPlatformLang
+
+[Guids]  
+  gEfiGlobalVariableGuid 
+
 [Depex]
   gEfiHiiDatabaseProtocolGuid AND
   gEfiHiiStringProtocolGuid

MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabase.h

@@ -40,6 +40,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/IfrSupportLib.h>
 #include <Library/UefiLib.h>
 #include <Library/PcdLib.h>
+#include <Library/HiiLib.h>
 
 #define HII_DATABASE_NOTIFY_GUID \
   { \

MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabaseDxe.inf

@@ -59,6 +59,7 @@
   DebugLib
   IfrSupportLib
   UefiLib
+  HiiLib
 
 [Protocols]
   gEfiConsoleControlProtocolGuid