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authorQing Huang <qing.huang@intel.com>2008-10-10 02:33:21 +0000
committerJordan Justen <jordan.l.justen@intel.com>2016-04-06 23:22:43 -0700
commit1f7de705d6d3cbd33092211da550a621230d6ee1 (patch)
tree893ec20cb5af0057d82a9f807c1174cdb2f371f9 /FatPkg
parentc3b8ec4310a6a5a51854e19285f4057a01ca08fc (diff)
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Add details comments for the code flow to initialize Unicode Collation (2) support.
(based on FatPkg commit 824fb80c85dfcb97662b8807c075c6cf7113b521) [jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD] Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Acked-by: Mark Doran <mark.doran@intel.com> Acked-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'FatPkg')
-rw-r--r--FatPkg/EnhancedFatDxe/UnicodeCollation.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/FatPkg/EnhancedFatDxe/UnicodeCollation.c b/FatPkg/EnhancedFatDxe/UnicodeCollation.c
index 4a849af2eb..9e5db7b967 100644
--- a/FatPkg/EnhancedFatDxe/UnicodeCollation.c
+++ b/FatPkg/EnhancedFatDxe/UnicodeCollation.c
@@ -162,6 +162,12 @@ InitializeUnicodeCollationSupportWithConfig (
/**
Initialize Unicode Collation support.
+ This function searches Initialized Unicode Collation support based on PCDs:
+ PcdUnicodeCollation2Support and PcdUnicodeCollationSupport.
+ It first tries to locate Unicode Collation 2 protocol and matches it with current
+ platform language code. If for any reason the first attempt fails, it then tries to
+ use Unicode Collation Protocol.
+
@param AgentHandle The handle used to open Unicode Collation (2) protocol.
@retval EFI_SUCCESS The Unicode Collation (2) protocol has been successfully located.
@@ -177,10 +183,18 @@ InitializeUnicodeCollationSupport (
EFI_STATUS Status;
Status = EFI_UNSUPPORTED;
+
+ //
+ // First try to use RFC 3066 Unicode Collation 2 Protocol.
+ //
if (FeaturePcdGet (PcdUnicodeCollation2Support)) {
Status = InitializeUnicodeCollationSupportWithConfig (AgentHandle, &mRfc3066Lang);
}
+ //
+ // If the attempt to use Unicode Collation 2 Protocol fails, then we fall back
+ // on the ISO 639-2 Unicode Collation Protocol.
+ //
if (FeaturePcdGet (PcdUnicodeCollationSupport) && EFI_ERROR (Status)) {
Status = InitializeUnicodeCollationSupportWithConfig (AgentHandle, &mIso639Lang);
}