MdeModulePkg: Add BdsDxe driver and PlatformBootManagerNull library.
BdsDxe driver links to UefiBootManagerLib and PlatformBootManager to provide a pure UEFI boot manager conforming to the UEFI spec. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17328 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ruiyu Ni
niruiyu
202
MdeModulePkg/Universal/BdsDxe/Language.c
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202
MdeModulePkg/Universal/BdsDxe/Language.c
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/** @file
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Language settings
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Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Bds.h"
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#define ISO_639_2_ENTRY_SIZE 3
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/**
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Check if lang is in supported language codes according to language string.
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This code is used to check if lang is in in supported language codes. It can handle
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RFC4646 and ISO639 language tags.
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In ISO639 language tags, take 3-characters as a delimitation to find matched string.
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In RFC4646 language tags, take semicolon as a delimitation to find matched string.
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For example:
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SupportedLang = "engfraengfra"
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Iso639Language = TRUE
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Lang = "eng", the return value is "TRUE", or
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Lang = "chs", the return value is "FALSE".
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Another example:
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SupportedLang = "en;fr;en-US;fr-FR"
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Iso639Language = FALSE
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Lang = "en", the return value is "TRUE", or
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Lang = "zh", the return value is "FALSE".
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@param SupportedLang Platform supported language codes.
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@param Lang Configured language.
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@param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
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@retval TRUE lang is in supported language codes.
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@retval FALSE lang is not in supported language codes.
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**/
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BOOLEAN
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IsLangInSupportedLangCodes(
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IN CHAR8 *SupportedLang,
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IN CHAR8 *Lang,
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IN BOOLEAN Iso639Language
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)
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{
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UINTN Index;
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UINTN CompareLength;
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UINTN LanguageLength;
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if (Iso639Language) {
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CompareLength = ISO_639_2_ENTRY_SIZE;
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for (Index = 0; Index < AsciiStrLen (SupportedLang); Index += CompareLength) {
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if (AsciiStrnCmp (Lang, SupportedLang + Index, CompareLength) == 0) {
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//
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// Successfully find the Lang string in SupportedLang string.
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//
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return TRUE;
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}
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}
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return FALSE;
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} else {
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//
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// Compare RFC4646 language code
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//
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for (LanguageLength = 0; Lang[LanguageLength] != '\0'; LanguageLength++);
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for (; *SupportedLang != '\0'; SupportedLang += CompareLength) {
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//
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// Skip ';' characters in SupportedLang
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//
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for (; *SupportedLang != '\0' && *SupportedLang == ';'; SupportedLang++);
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//
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// Determine the length of the next language code in SupportedLang
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//
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for (CompareLength = 0; SupportedLang[CompareLength] != '\0' && SupportedLang[CompareLength] != ';'; CompareLength++);
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if ((CompareLength == LanguageLength) &&
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(AsciiStrnCmp (Lang, SupportedLang, CompareLength) == 0)) {
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//
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// Successfully find the Lang string in SupportedLang string.
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//
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return TRUE;
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}
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}
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return FALSE;
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}
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}
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/**
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Initialize Lang or PlatformLang variable, if Lang or PlatformLang variable is not found,
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or it has been set to an unsupported value(not one of platform supported language codes),
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set the default language code to it.
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@param LangName Language name, L"Lang" or L"PlatformLang".
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@param SupportedLang Platform supported language codes.
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@param DefaultLang Default language code.
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@param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646,
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TRUE for L"Lang" LangName or FALSE for L"PlatformLang" LangName.
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**/
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VOID
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InitializeLangVariable (
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IN CHAR16 *LangName,
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IN CHAR8 *SupportedLang,
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IN CHAR8 *DefaultLang,
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IN BOOLEAN Iso639Language
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)
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{
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CHAR8 *Lang;
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//
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// Find current Lang or PlatformLang from EFI Variable.
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//
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GetEfiGlobalVariable2 (LangName, (VOID **) &Lang, NULL);
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//
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// If Lang or PlatformLang variable is not found,
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// or it has been set to an unsupported value(not one of the supported language codes),
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// set the default language code to it.
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//
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if ((Lang == NULL) || !IsLangInSupportedLangCodes (SupportedLang, Lang, Iso639Language)) {
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//
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// The default language code should be one of the supported language codes.
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//
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ASSERT (IsLangInSupportedLangCodes (SupportedLang, DefaultLang, Iso639Language));
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BdsDxeSetVariableAndReportStatusCodeOnError (
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LangName,
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&gEfiGlobalVariableGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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AsciiStrSize (DefaultLang),
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DefaultLang
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);
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}
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if (Lang != NULL) {
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FreePool (Lang);
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}
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}
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/**
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Determine the current language that will be used
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based on language related EFI Variables.
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@param LangCodesSettingRequired - If required to set LangCodes variable
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**/
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VOID
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InitializeLanguage (
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BOOLEAN LangCodesSettingRequired
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)
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{
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EFI_STATUS Status;
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CHAR8 *LangCodes;
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CHAR8 *PlatformLangCodes;
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LangCodes = (CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultLangCodes);
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PlatformLangCodes = (CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes);
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if (LangCodesSettingRequired) {
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if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
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//
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// UEFI 2.1 depricated this variable so we support turning it off
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//
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Status = gRT->SetVariable (
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L"LangCodes",
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&gEfiGlobalVariableGuid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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AsciiStrSize (LangCodes),
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LangCodes
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);
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//
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// Platform needs to make sure setting volatile variable before calling 3rd party code shouldn't fail.
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//
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ASSERT_EFI_ERROR(Status);
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}
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Status = gRT->SetVariable (
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L"PlatformLangCodes",
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&gEfiGlobalVariableGuid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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AsciiStrSize (PlatformLangCodes),
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PlatformLangCodes
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);
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//
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// Platform needs to make sure setting volatile variable before calling 3rd party code shouldn't fail.
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//
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ASSERT_EFI_ERROR(Status);
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}
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if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
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//
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// UEFI 2.1 depricated this variable so we support turning it off
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//
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InitializeLangVariable (L"Lang", LangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultLang), TRUE);
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}
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InitializeLangVariable (L"PlatformLang", PlatformLangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang), FALSE);
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}
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