X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FPeiMemoryLib%2FCompareMemWrapper.c;h=278ef3369e80a6e73e685ff52a185e4cb161a1c1;hb=1fef058f4b8fefc455bb171e4908c3e835b1b492;hp=4c0d3eaadbab5863b3e4480e0ecad15e25767a89;hpb=add13dc21720eff1a37fdea34c0fef190e2ad37d;p=mirror_edk2.git

diff --git a/MdePkg/Library/PeiMemoryLib/CompareMemWrapper.c b/MdePkg/Library/PeiMemoryLib/CompareMemWrapper.c
index 4c0d3eaadb..278ef3369e 100644
--- a/MdePkg/Library/PeiMemoryLib/CompareMemWrapper.c
+++ b/MdePkg/Library/PeiMemoryLib/CompareMemWrapper.c
@@ -1,25 +1,24 @@
 /** @file
   CompareMem() implementation.
 
-  Copyright (c) 2006, Intel Corporation<BR>
-  All rights reserved. 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
-  http://opensource.org/licenses/bsd-license.php
-
-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-  Module Name:  CompareMemWrapper.c
-
-  The following BaseMemoryLib instances share the same version of this file:
-
+  The following BaseMemoryLib instances contain the same copy of this file:
     BaseMemoryLib
     BaseMemoryLibMmx
     BaseMemoryLibSse2
     BaseMemoryLibRepStr
+    BaseMemoryLibOptDxe
+    BaseMemoryLibOptPei
     PeiMemoryLib
-    DxeMemoryLib
+    UefiMemoryLib
+
+Copyright (c) 2006 - 2009, Intel Corporation<BR>
+All rights reserved. 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
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 **/
 
@@ -32,11 +31,11 @@
   If all Length bytes of the two buffers are identical, then 0 is returned.  Otherwise, the
   value returned is the first mismatched byte in SourceBuffer subtracted from the first
   mismatched byte in DestinationBuffer.
-  If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().
-  If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().
-  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). 
-  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). 
-
+  
+  If Length > 0 and DestinationBuffer is NULL, then ASSERT().
+  If Length > 0 and SourceBuffer is NULL, then ASSERT().
+  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().
+  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
 
   @param  DestinationBuffer Pointer to the destination buffer to compare.
   @param  SourceBuffer      Pointer to the source buffer to compare.
@@ -45,7 +44,7 @@
   @return 0                 All Length bytes of the two buffers are identical.
   @retval Non-zero          The first mismatched byte in SourceBuffer subtracted from the first
                             mismatched byte in DestinationBuffer.
-
+                            
 **/
 INTN
 EFIAPI
@@ -55,7 +54,7 @@ CompareMem (
   IN UINTN       Length
   )
 {
-  if (Length == 0) {
+  if (Length == 0 || DestinationBuffer == SourceBuffer) {
     return 0;
   }
   ASSERT (DestinationBuffer != NULL);