UEFI HII: Merge UEFI HII support changes from branch.

[mirror_edk2.git] / MdeModulePkg / Library / IfrSupportLib / UefiIfrString.c

/** @file

Copyright (c) 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Module Name:

  UefiIfrString.c

Abstract:

  Common Library Routines to assist to handle String and Language.


**/

#include "UefiIfrLibraryInternal.h"

//
// Lookup table of ISO639-2 3 character language codes to ISO 639-1 2 character language codes
// Each entry is 5 CHAR8 values long.  The first 3 CHAR8 values are the ISO 639-2 code.
// The last 2 CHAR8 values are the ISO 639-1 code.
//
CHAR8 Iso639ToRfc3066ConversionTable[] =
"\
aaraa\
abkab\
afraf\
amham\
araar\
asmas\
aymay\
azeaz\
bakba\
belbe\
benbn\
bihbh\
bisbi\
bodbo\
brebr\
bulbg\
catca\
cescs\
corkw\
cosco\
cymcy\
danda\
deude\
dzodz\
ellel\
engen\
epoeo\
estet\
euseu\
faofo\
fasfa\
fijfj\
finfi\
frafr\
fryfy\
gaiga\
gdhgd\
glggl\
grngn\
gujgu\
hauha\
hebhe\
hinhi\
hrvhr\
hunhu\
hyehy\
ikuiu\
ileie\
inaia\
indid\
ipkik\
islis\
itait\
jawjw\
jpnja\
kalkl\
kankn\
kasks\
katka\
kazkk\
khmkm\
kinrw\
kirky\
korko\
kurku\
laolo\
latla\
lavlv\
linln\
litlt\
ltzlb\
malml\
marmr\
mkdmk\
mlgmg\
mltmt\
molmo\
monmn\
mrimi\
msams\
myamy\
nauna\
nepne\
nldnl\
norno\
ocioc\
ormom\
panpa\
polpl\
porpt\
pusps\
quequ\
rohrm\
ronro\
runrn\
rusru\
sagsg\
sansa\
sinsi\
slksk\
slvsl\
smise\
smosm\
snasn\
sndsd\
somso\
sotst\
spaes\
sqisq\
srpsr\
sswss\
sunsu\
swasw\
swesv\
tamta\
tattt\
telte\
tgktg\
tgltl\
thath\
tsnts\
tuktk\
twitw\
uigug\
ukruk\
urdur\
uzbuz\
vievi\
volvo\
wolwo\
xhoxh\
yidyi\
zhaza\
zhozh\
zulzu\
";


/**
  Convert language code from RFC3066 to ISO639-2.

  @param  LanguageRfc3066        RFC3066 language code.
  @param  LanguageIso639         ISO639-2 language code.

  @retval EFI_SUCCESS            Language code converted.
  @retval EFI_NOT_FOUND          Language code not found.

**/
EFI_STATUS
ConvertRfc3066LanguageToIso639Language (
  CHAR8   *LanguageRfc3066,
  CHAR8   *LanguageIso639
  )
{
  UINTN  Index;

  if ((LanguageRfc3066[2] != '-') && (LanguageRfc3066[2] != 0)) {
    CopyMem (LanguageIso639, LanguageRfc3066, 3);
    return EFI_SUCCESS;
  }

  for (Index = 0; Iso639ToRfc3066ConversionTable[Index] != 0; Index += 5) {
    if (CompareMem (LanguageRfc3066, &Iso639ToRfc3066ConversionTable[Index + 3], 2) == 0) {
      CopyMem (LanguageIso639, &Iso639ToRfc3066ConversionTable[Index], 3);
      return EFI_SUCCESS;
    }
  }

  return EFI_NOT_FOUND;
}


/**
  Convert language code list from RFC3066 to ISO639-2, e.g. "en-US;fr-FR" will
  be converted to "engfra".

  @param  SupportedLanguages     The RFC3066 language list.

  @return The ISO639-2 language list.

**/
CHAR8 *
Rfc3066ToIso639 (
  CHAR8  *SupportedLanguages
  )
{
  CHAR8       *Languages;
  CHAR8       *ReturnValue;
  CHAR8       *LangCodes;
  CHAR8       LangRfc3066[RFC_3066_ENTRY_SIZE];
  CHAR8       LangIso639[ISO_639_2_ENTRY_SIZE];
  EFI_STATUS  Status;

  ReturnValue = AllocateZeroPool (AsciiStrSize (SupportedLanguages));
  if (ReturnValue == NULL) {
    return ReturnValue;
  }

  Languages = ReturnValue;
  LangCodes = SupportedLanguages;
  while (*LangCodes != 0) {
    GetNextLanguage (&LangCodes, LangRfc3066);

    Status = ConvertRfc3066LanguageToIso639Language (LangRfc3066, LangIso639);
    if (!EFI_ERROR (Status)) {
      CopyMem (Languages, LangIso639, 3);
      Languages = Languages + 3;
    }
  }

  return ReturnValue;
}


/**
  Determine what is the current language setting

  @param  Lang                   Pointer of system language

  @return Status code

**/
EFI_STATUS
GetCurrentLanguage (
  OUT     CHAR8               *Lang
  )
{
  EFI_STATUS  Status;
  UINTN       Size;

  //
  // 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;
}


/**
  Get next language from language code list (with separator ';').

  @param  LangCode               On input: point to first language in the list. On
                                 output: point to next language in the list, or
                                 NULL if no more language in the list.
  @param  Lang                   The first language in the list.

  @return None.

**/
VOID
GetNextLanguage (
  IN OUT CHAR8      **LangCode,
  OUT CHAR8         *Lang
  )
{
  UINTN  Index;
  CHAR8  *StringPtr;

  if (LangCode == NULL || *LangCode == NULL) {
    *Lang = 0;
    return;
  }

  Index = 0;
  StringPtr = *LangCode;
  while (StringPtr[Index] != 0 && StringPtr[Index] != ';') {
    Index++;
  }

  CopyMem (Lang, StringPtr, Index);
  Lang[Index] = 0;

  if (StringPtr[Index] == ';') {
    Index++;
  }
  *LangCode = StringPtr + Index;
}


/**
  This function returns the list of supported languages, in the format specified