From fbda8a344bafff20d31ceb649a220e4aaa465468 Mon Sep 17 00:00:00 2001
From: Hao Wu <hao.a.wu@intel.com>
Date: Thu, 17 Nov 2016 14:59:54 +0800
Subject: MdePkg/UefiFileHandleLib: Refine the check for valid Ascii character

The commit will check if bit 7 is set of an Ascii character to judge its
validity.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
---
 MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'MdePkg/Library')

diff --git a/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c b/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c
index daed0f4870..57aad77bc1 100644
--- a/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c
+++ b/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c
@@ -1,7 +1,7 @@
 /** @file
   Provides interface to EFI_FILE_HANDLE functionality.
 
-  Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved. <BR>
+  Copyright (c) 2006 - 2017, 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
@@ -1138,7 +1138,7 @@ FileHandleWriteLine(
     }
     UnicodeStrToAsciiStrS (Buffer, AsciiBuffer, Size);
     for (Index = 0; Index < Size; Index++) {
-      if (!((AsciiBuffer[Index] >= 0) && (AsciiBuffer[Index] < 128))){
+      if ((AsciiBuffer[Index] & BIT7) != 0) {
         FreePool(AsciiBuffer);
         return EFI_INVALID_PARAMETER;
       }
-- 
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