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audk/IntelFrameworkModulePkg/Universal/BdsDxe/Language.c
Ruiyu Ni c4571f0479 Add check to avoid null pointer deference. 
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@15410 6f19259b-4bc3-4df7-8a09-765794883524
2014-03-28 02:50:47 +00:00

500 lines
12 KiB
C
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/** @file
Language settings
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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.
**/
#include "Language.h"
#include "FrontPage.h"
EFI_GUID mFontPackageGuid = {
0x78941450, 0x90ab, 0x4fb1, {0xb7, 0x5f, 0x58, 0x92, 0x14, 0xe2, 0x4a, 0xc}
};
#define NARROW_GLYPH_NUMBER 8
#define WIDE_GLYPH_NUMBER 75
typedef struct {
///
/// This 4-bytes total array length is required by HiiAddPackages()
///
UINT32 Length;
//
// This is the Font package definition
//
EFI_HII_PACKAGE_HEADER Header;
UINT16 NumberOfNarrowGlyphs;
UINT16 NumberOfWideGlyphs;
EFI_NARROW_GLYPH NarrowArray[NARROW_GLYPH_NUMBER];
EFI_WIDE_GLYPH WideArray[WIDE_GLYPH_NUMBER];
} FONT_PACK_BIN;
FONT_PACK_BIN mFontBin = {
sizeof (FONT_PACK_BIN),
{
sizeof (FONT_PACK_BIN) - sizeof (UINT32),
EFI_HII_PACKAGE_SIMPLE_FONTS,
},
NARROW_GLYPH_NUMBER,
0,
{ // Narrow Glyphs
{
0x05d0,
0x00,
{
0x00,
0x00,
0x00,
0x4E,
0x6E,
0x62,
0x32,
0x32,
0x3C,
0x68,
0x4C,
0x4C,
0x46,
0x76,
0x72,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d1,
0x00,
{
0x00,
0x00,
0x00,
0x78,
0x7C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x7E,
0x7E,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d2,
0x00,
{
0x00,
0x00,
0x00,
0x78,
0x7C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x1C,
0x3E,
0x66,
0x66,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d3,
0x00,
{
0x00,
0x00,
0x00,
0x7E,
0x7E,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d4,
0x00,
{
0x00,
0x00,
0x00,
0x7C,
0x7E,
0x06,
0x06,
0x06,
0x06,
0x66,
0x66,
0x66,
0x66,
0x66,
0x66,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d5,
0x00,
{
0x00,
0x00,
0x00,
0x3C,
0x3C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x0C,
0x00,
0x00,
0x00,
0x00
}
},
{
0x05d6,
0x00,
{
0x00,
0x00,
0x00,
0x38,
0x38,
0x1E,
0x1E,
0x18,
0x18,
0x18,
0x18,
0x18,
0x18,
0x18,
0x18,
0x00,
0x00,
0x00,
0x00
}
},
{
0x0000,
0x00,
{
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00,
0x00
}
}
}
};
/**
Routine to export glyphs to the HII database. This is in addition to whatever is defined in the Graphics Console driver.
**/
VOID
ExportFonts (
VOID
)
{
EFI_HII_HANDLE HiiHandle;
HiiHandle = HiiAddPackages (
&mFontPackageGuid,
gImageHandle,
&mFontBin,
NULL
);
ASSERT (HiiHandle != NULL);
}
/**
Get next language from language code list (with separator ';').
If LangCode is NULL, then ASSERT.
If Lang is NULL, then ASSERT.
@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.
**/
VOID
EFIAPI
GetNextLanguage (
IN OUT CHAR8 **LangCode,
OUT CHAR8 *Lang
)
{
UINTN Index;
CHAR8 *StringPtr;
ASSERT (LangCode != NULL);
ASSERT (*LangCode != NULL);
ASSERT (Lang != NULL);
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;
}
/**
Check if lang is in supported language codes according to language string.
This code is used to check if lang is in in supported language codes. It can handle
RFC4646 and ISO639 language tags.
In ISO639 language tags, take 3-characters as a delimitation to find matched string.
In RFC4646 language tags, take semicolon as a delimitation to find matched string.
For example:
SupportedLang = "engfraengfra"
Iso639Language = TRUE
Lang = "eng", the return value is "TRUE", or
Lang = "chs", the return value is "FALSE".
Another example:
SupportedLang = "en;fr;en-US;fr-FR"
Iso639Language = FALSE
Lang = "en", the return value is "TRUE", or
Lang = "zh", the return value is "FALSE".
@param SupportedLang Platform supported language codes.
@param Lang Configured language.
@param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
@retval TRUE lang is in supported language codes.
@retval FALSE lang is not in supported language codes.
**/
BOOLEAN
IsLangInSupportedLangCodes(
IN CHAR8 *SupportedLang,
IN CHAR8 *Lang,
IN BOOLEAN Iso639Language
)
{
UINTN Index;
UINTN CompareLength;
UINTN LanguageLength;
if (Iso639Language) {
CompareLength = ISO_639_2_ENTRY_SIZE;
for (Index = 0; Index < AsciiStrLen (SupportedLang); Index += CompareLength) {
if (AsciiStrnCmp (Lang, SupportedLang + Index, CompareLength) == 0) {
//
// Successfully find the Lang string in SupportedLang string.
//
return TRUE;
}
}
return FALSE;
} else {
//
// Compare RFC4646 language code
//
for (LanguageLength = 0; Lang[LanguageLength] != '\0'; LanguageLength++);
for (; *SupportedLang != '\0'; SupportedLang += CompareLength) {
//
// Skip ';' characters in SupportedLang
//
for (; *SupportedLang != '\0' && *SupportedLang == ';'; SupportedLang++);
//
// Determine the length of the next language code in SupportedLang
//
for (CompareLength = 0; SupportedLang[CompareLength] != '\0' && SupportedLang[CompareLength] != ';'; CompareLength++);
if ((CompareLength == LanguageLength) &&
(AsciiStrnCmp (Lang, SupportedLang, CompareLength) == 0)) {
//
// Successfully find the Lang string in SupportedLang string.
//
return TRUE;
}
}
return FALSE;
}
}
/**
Initialize Lang or PlatformLang variable, if Lang or PlatformLang variable is not found,
or it has been set to an unsupported value(not one of platform supported language codes),
set the default language code to it.
@param LangName Language name, L"Lang" or L"PlatformLang".
@param SupportedLang Platform supported language codes.
@param DefaultLang Default language code.
@param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646,
TRUE for L"Lang" LangName or FALSE for L"PlatformLang" LangName.
**/
VOID
InitializeLangVariable (
IN CHAR16 *LangName,
IN CHAR8 *SupportedLang,
IN CHAR8 *DefaultLang,
IN BOOLEAN Iso639Language
)
{
CHAR8 *Lang;
//
// Find current Lang or PlatformLang from EFI Variable.
//
GetEfiGlobalVariable2 (LangName, (VOID **) &Lang, NULL);
//
// If Lang or PlatformLang variable is not found,
// or it has been set to an unsupported value(not one of the supported language codes),
// set the default language code to it.
//
if ((Lang == NULL) || !IsLangInSupportedLangCodes (SupportedLang, Lang, Iso639Language)) {
//
// The default language code should be one of the supported language codes.
//
ASSERT (IsLangInSupportedLangCodes (SupportedLang, DefaultLang, Iso639Language));
BdsDxeSetVariableAndReportStatusCodeOnError (
LangName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
AsciiStrSize (DefaultLang),
DefaultLang
);
}
if (Lang != NULL) {
FreePool (Lang);
}
}
/**
Determine the current language that will be used
based on language related EFI Variables.
@param LangCodesSettingRequired - If required to set LangCodes variable
**/
VOID
InitializeLanguage (
BOOLEAN LangCodesSettingRequired
)
{
EFI_STATUS Status;
CHAR8 *LangCodes;
CHAR8 *PlatformLangCodes;
ExportFonts ();
LangCodes = (CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultLangCodes);
PlatformLangCodes = (CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes);
if (LangCodesSettingRequired) {
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
//
// UEFI 2.0 depricated this variable so we support turning it off
//
Status = gRT->SetVariable (
L"LangCodes",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
AsciiStrSize (LangCodes),
LangCodes
);
//
// Platform needs to make sure setting volatile variable before calling 3rd party code shouldn't fail.
//
ASSERT_EFI_ERROR (Status);
}
Status = gRT->SetVariable (
L"PlatformLangCodes",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
AsciiStrSize (PlatformLangCodes),
PlatformLangCodes
);
//
// Platform needs to make sure setting volatile variable before calling 3rd party code shouldn't fail.
//
ASSERT_EFI_ERROR (Status);
}
if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate)) {
//
// UEFI 2.0 depricated this variable so we support turning it off
//
InitializeLangVariable (L"Lang", LangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultLang), TRUE);
}
InitializeLangVariable (L"PlatformLang", PlatformLangCodes, (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang), FALSE);
}
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