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.kin...@intel.com>
Cc: Liming Gao <liming....@intel.com>
Signed-off-by: Tom Zhao <tz...@solarflare.com>
---
Notes:
v3:
- Add comment about usage for RFC4646 and ISO-639
MdePkg/Include/Library/UefiLib.h | 18 ++++++
MdePkg/Library/UefiLib/UefiLib.c | 61 +++++++++++++-------
2 files changed, 58 insertions(+), 21 deletions(-)
diff --git a/MdePkg/Include/Library/UefiLib.h
b/MdePkg/Include/Library/UefiLib.h
index 1650f30ddbc6..f72b7b31f2f1 100644
--- a/MdePkg/Include/Library/UefiLib.h
+++ b/MdePkg/Include/Library/UefiLib.h
@@ -461,6 +461,24 @@ EfiTestChildHandle (
IN CONST EFI_GUID *ProtocolGuid
);
+/**
+ * This function checks the supported languages list for a target language,
+ * This only supports RFC 4646 Languages. To compare ISO 639 languages,
refer
+ * to function CompareIso639LanguageCode()
+ *
+ * @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.
diff --git a/MdePkg/Library/UefiLib/UefiLib.c
b/MdePkg/Library/UefiLib/UefiLib.c
index daa4af762e62..a89e327fc6f6 100644
--- a/MdePkg/Library/UefiLib/UefiLib.c
+++ b/MdePkg/Library/UefiLib/UefiLib.c
@@ -640,6 +640,37 @@ EfiTestChildHandle (
return Status;
}
+/**
+ * This function checks the supported languages list for a target language,
+ * This only supports RFC 4646 Languages. To compare ISO 639 languages,
refer
+ * to function CompareIso639LanguageCode()
+ *
+ * @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 +831,19 @@ 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 +1125,17 @@ 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
//
--
2.21.0
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