1 files changed, 90 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/UefiHiiLib/HiiLanguage.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/UefiHiiLib/HiiLanguage.c
new file mode 100644
index 00000000..7c6410cc
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/UefiHiiLib/HiiLanguage.c
@@ -0,0 +1,90 @@
+/** @file
+  Language related HII Library implementation.
+
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#include "InternalHiiLib.h"
+
+/**
+  Retrieves a pointer to the a Null-terminated ASCII string containing the list
+  of languages that an HII handle in the HII Database supports.  The returned
+  string is allocated using AllocatePool().  The caller is responsible for freeing
+  the returned string using FreePool().  The format of the returned string follows
+  the language format assumed the HII Database.
+
+  If HiiHandle is NULL, then ASSERT().
+
+  @param[in]  HiiHandle  A handle that was previously registered in the HII Database.
+
+  @retval NULL   HiiHandle is not registered in the HII database
+  @retval NULL   There are not enough resources available to retrieve the supported
+                 languages.
+  @retval NULL   The list of supported languages could not be retrieved.
+  @retval Other  A pointer to the Null-terminated ASCII string of supported languages.
+
+**/
+CHAR8 *
+EFIAPI
+HiiGetSupportedLanguages (
+  IN EFI_HII_HANDLE           HiiHandle
+  )
+{
+  EFI_STATUS  Status;
+  UINTN       LanguageSize;
+  CHAR8       TempSupportedLanguages;
+  CHAR8       *SupportedLanguages;
+
+  ASSERT (HiiHandle != NULL);
+
+  //
+  // Retrieve the size required for the supported languages buffer.
+  //
+  LanguageSize = 0;
+  Status = gHiiString->GetLanguages (gHiiString, HiiHandle, &TempSupportedLanguages, &LanguageSize);
+
+  //
+  // If GetLanguages() returns EFI_SUCCESS for a zero size,
+  // then there are no supported languages registered for HiiHandle.  If GetLanguages()
+  // returns an error other than EFI_BUFFER_TOO_SMALL, then HiiHandle is not present
+  // in the HII Database
+  //
+  if (Status != EFI_BUFFER_TOO_SMALL) {
+    //
+    // Return NULL if the size can not be retrieved, or if HiiHandle is not in the HII Database
+    //
+    return NULL;
+  }
+
+  //
+  // Allocate the supported languages buffer.
+  //
+  SupportedLanguages = AllocateZeroPool (LanguageSize);
+  if (SupportedLanguages == NULL) {
+    //
+    // Return NULL if allocation fails.
+    //
+    return NULL;
+  }
+
+  //
+  // Retrieve the supported languages string
+  //
+  Status = gHiiString->GetLanguages (gHiiString, HiiHandle, SupportedLanguages, &LanguageSize);
+  if (EFI_ERROR (Status)) {
+    //
+    // Free the buffer and return NULL if the supported languages can not be retrieved.
+    //
+    FreePool (SupportedLanguages);
+    return NULL;
+  }
+
+  //
+  // Return the Null-terminated ASCII string of supported languages
+  //
+  return SupportedLanguages;
+}
+