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MdePkg: UefiLib: Add a function to check if a language is supported 

Add a function that checks if a target language is in the supported
languages list. Add some calls to this function where appropriate in
UefiLib.c

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Tom Zhao <tzhao@solarflare.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Tom Zhao 2019-08-20 15:08:43 +01:00 committed by Liming Gao
parent 26fc074a5f
commit ea331a5c21
2 changed files with 56 additions and 21 deletions
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17
MdePkg/Include/Library/UefiLib.h
View File

@ -461,6 +461,23 @@ EfiTestChildHandle (
IN CONST EFI_GUID *ProtocolGuid
);
/**
* This function checks the supported languages list for a target language,
* This only supports RFC 4646 Languages.
*
* @param SupportedLanguages The supported languages
* @param TargetLanguage The target language
*
* @return Returns EFI_SUCCESS if the language is supported,
* EFI_UNSUPPORTED otherwise
*/
EFI_STATUS
EFIAPI
IsLanguageSupported (
IN CONST CHAR8 *SupportedLanguages,
IN CONST CHAR8 *TargetLanguage
);
/**
This function looks up a Unicode string in UnicodeStringTable.

60
MdePkg/Library/UefiLib/UefiLib.c
View File

@ -640,6 +640,36 @@ EfiTestChildHandle (
return Status;
}
/**
* This function checks the supported languages list for a target language,
* This only supports RFC 4646 Languages.
*
* @param SupportedLanguages The supported languages
* @param TargetLanguage The target language
*
* @return Returns EFI_SUCCESS if the language is supported,
* EFI_UNSUPPORTED otherwise
*/
EFI_STATUS
EFIAPI
IsLanguageSupported (
IN CONST CHAR8 *SupportedLanguages,
IN CONST CHAR8 *TargetLanguage
)
{
UINTN Index;
while (*SupportedLanguages != 0) {
for (Index = 0; SupportedLanguages[Index] != 0 && SupportedLanguages[Index] != ';'; Index++);
if ((AsciiStrnCmp(SupportedLanguages, TargetLanguage, Index) == 0) && (TargetLanguage[Index] == 0)) {
return EFI_SUCCESS;
}
SupportedLanguages += Index;
for (; *SupportedLanguages != 0 && *SupportedLanguages == ';'; SupportedLanguages++);
}
return EFI_UNSUPPORTED;
}
/**
This function looks up a Unicode string in UnicodeStringTable.
@ -800,24 +830,19 @@ LookupUnicodeString2 (
// Make sure Language is in the set of Supported Languages
//
Found = FALSE;
while (*SupportedLanguages != 0) {
if (Iso639Language) {
if (Iso639Language) {
while (*SupportedLanguages != 0) {
if (CompareIso639LanguageCode (Language, SupportedLanguages)) {
Found = TRUE;
break;
}
SupportedLanguages += 3;
} else {
for (Index = 0; SupportedLanguages[Index] != 0 && SupportedLanguages[Index] != ';'; Index++);
if ((AsciiStrnCmp(SupportedLanguages, Language, Index) == 0) && (Language[Index] == 0)) {
Found = TRUE;
break;
}
SupportedLanguages += Index;
for (; *SupportedLanguages != 0 && *SupportedLanguages == ';'; SupportedLanguages++);
}
} else {
Found = !IsLanguageSupported(Language, SupportedLanguages);
}
//
// If Language is not a member of SupportedLanguages, then return EFI_UNSUPPORTED
//
@ -1099,24 +1124,17 @@ AddUnicodeString2 (
// Make sure Language is a member of SupportedLanguages
//
Found = FALSE;
while (*SupportedLanguages != 0) {
if (Iso639Language) {
if (Iso639Language) {
while (*SupportedLanguages != 0) {
if (CompareIso639LanguageCode (Language, SupportedLanguages)) {
Found = TRUE;
break;
}
SupportedLanguages += 3;
} else {
for (Index = 0; SupportedLanguages[Index] != 0 && SupportedLanguages[Index] != ';'; Index++);
if (AsciiStrnCmp(SupportedLanguages, Language, Index) == 0) {
Found = TRUE;
break;
}
SupportedLanguages += Index;
for (; *SupportedLanguages != 0 && *SupportedLanguages == ';'; SupportedLanguages++);
}
} else {
Found = !IsLanguageSupported(Language, SupportedLanguages);
}
//
// If Language is not a member of SupportedLanguages, then return EFI_UNSUPPORTED
//