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-rw-r--r--MdePkg/Include/Library/BaseLib.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index c74ea23a74..6998171bd5 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -636,6 +636,9 @@ StrHexToUint64 (
to the ASCII string Destination by copying the lower 8 bits of
each Unicode character. It returns Destination.
+ The caller is responsible to make sure Destination points to a buffer with size
+ equal or greater than ((StrLen (Source) + 1) * sizeof (CHAR8)) in bytes.
+
If any Unicode characters in Source contain non-zero value in
the upper 8 bits, then ASSERT().