/** @file\r
CompareMem() implementation.\r
\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- The following BaseMemoryLib instances share the same version of this file:\r
-\r
+ The following BaseMemoryLib instances contain the same copy of this file:\r
BaseMemoryLib\r
BaseMemoryLibMmx\r
BaseMemoryLibSse2\r
BaseMemoryLibRepStr\r
+ BaseMemoryLibOptDxe\r
+ BaseMemoryLibOptPei\r
PeiMemoryLib\r
- DxeMemoryLib\r
+ UefiMemoryLib\r
\r
-**/\r
+Copyright (c) 2006 - 2009, Intel Corporation<BR>\r
+All rights reserved. This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
\r
-//\r
-// Include common header file for this module.\r
-//\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
+**/\r
\r
#include "MemLibInternals.h"\r
\r
If all Length bytes of the two buffers are identical, then 0 is returned. Otherwise, the\r
value returned is the first mismatched byte in SourceBuffer subtracted from the first\r
mismatched byte in DestinationBuffer.\r
- If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().\r
- If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().\r
- If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). \r
- If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). \r
-\r
+ \r
+ If Length > 0 and DestinationBuffer is NULL, then ASSERT().\r
+ If Length > 0 and SourceBuffer is NULL, then ASSERT().\r
+ If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().\r
+ If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r
\r
@param DestinationBuffer Pointer to the destination buffer to compare.\r
@param SourceBuffer Pointer to the source buffer to compare.\r
@return 0 All Length bytes of the two buffers are identical.\r
@retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first\r
mismatched byte in DestinationBuffer.\r
-\r
+ \r
**/\r
INTN\r
EFIAPI\r
IN UINTN Length\r
)\r
{\r
- if (Length == 0) {\r
+ if (Length == 0 || DestinationBuffer == SourceBuffer) {\r
return 0;\r
}\r
ASSERT (DestinationBuffer != NULL);\r