MdePkg/Library/HiiLib/HiiLanguage.c

   1 /** @file
   2   Language related HII Library implementation.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16 #include "InternalHiiLib.h"
  17
  18 EFI_STATUS
  19 EFIAPI
  20 HiiLibGetCurrentLanguage (
  21   OUT     CHAR8               *Lang
  22   )
  23 {
  24   EFI_STATUS  Status;
  25   UINTN       Size;
  26
  27   ASSERT (Lang != NULL);
  28
  29   //
  30   // Get current language setting
  31   //
  32   Size = RFC_3066_ENTRY_SIZE;
  33   Status = gRT->GetVariable (
  34                   L"PlatformLang",
  35                   &gEfiGlobalVariableGuid,
  36                   NULL,
  37                   &Size,
  38                   Lang
  39                   );
  40
  41   if (EFI_ERROR (Status)) {
  42     AsciiStrCpy (Lang, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang));
  43   }
  44
  45   return Status;
  46 }
  47
  48
  49 VOID
  50 EFIAPI
  51 HiiLibGetNextLanguage (
  52   IN OUT CHAR8      **LangCode,
  53   OUT CHAR8         *Lang
  54   )
  55 {
  56   UINTN  Index;
  57   CHAR8  *StringPtr;
  58
  59   ASSERT (LangCode != NULL);
  60   ASSERT (Lang != NULL);
  61
  62   Index = 0;
  63   StringPtr = *LangCode;
  64   while (StringPtr[Index] != 0 && StringPtr[Index] != ';') {
  65     Index++;
  66   }
  67
  68   CopyMem (Lang, StringPtr, Index);
  69   Lang[Index] = 0;
  70
  71   if (StringPtr[Index] == ';') {
  72     Index++;
  73   }
  74   *LangCode = StringPtr + Index;
  75 }
  76
  77
  78 CHAR8 *
  79 EFIAPI
  80 HiiLibGetSupportedLanguages (
  81   IN EFI_HII_HANDLE           HiiHandle
  82   )
  83 {
  84   EFI_STATUS  Status;
  85   UINTN       BufferSize;
  86   CHAR8       *LanguageString;
  87
  88   ASSERT (HiiHandle != NULL);
  89   ASSERT (IsHiiHandleRegistered (HiiHandle));
  90   //
  91   // Collect current supported Languages for given HII handle
  92   //
  93   BufferSize = 0x1000;
  94   LanguageString = AllocatePool (BufferSize);
  95   Status = mHiiStringProt->GetLanguages (mHiiStringProt, HiiHandle, LanguageString, &BufferSize);
  96
  97   if (Status == EFI_BUFFER_TOO_SMALL) {
  98     gBS->FreePool (LanguageString);
  99     LanguageString = AllocatePool (BufferSize);
 100     Status = mHiiStringProt->GetLanguages (mHiiStringProt, HiiHandle, LanguageString, &BufferSize);
 101   }
 102
 103   if (EFI_ERROR (Status)) {
 104     LanguageString = NULL;
 105   }
 106
 107   return LanguageString;
 108 }
 109
 110
 111 UINT16
 112 EFIAPI
 113 HiiLibGetSupportedLanguageNumber (
 114   IN EFI_HII_HANDLE           HiiHandle
 115   )
 116 {
 117   CHAR8   *Languages;
 118   CHAR8   *LanguageString;
 119   UINT16  LangNumber;
 120   CHAR8   Lang[RFC_3066_ENTRY_SIZE];
 121
 122   Languages = HiiLibGetSupportedLanguages (HiiHandle);
 123   if (Languages == NULL) {
 124     return 0;
 125   }
 126
 127   LangNumber = 0;
 128   LanguageString = Languages;
 129   while (*LanguageString != 0) {
 130     HiiLibGetNextLanguage (&LanguageString, Lang);
 131     LangNumber++;
 132   }
 133   gBS->FreePool (Languages);
 134
 135   return LangNumber;
 136 }