/** @file\r
CopyMem() 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
- Module Name: CopyMemWrapper.c\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
+ \r
BaseMemoryLib\r
BaseMemoryLibMmx\r
BaseMemoryLibSse2\r
BaseMemoryLibRepStr\r
+ BaseMemoryLibOptDxe\r
+ BaseMemoryLibOptPei\r
PeiMemoryLib\r
UefiMemoryLib\r
\r
+ Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
+ 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
**/\r
\r
#include "MemLibInternals.h"\r
\r
/**\r
- Copy Length bytes from Source to Destination.\r
-\r
- This function copies Length bytes from SourceBuffer to DestinationBuffer, and\r
- returns DestinationBuffer. The implementation must be reentrant, and it must\r
- handle the case where SourceBuffer overlaps DestinationBuffer.\r
+ Copies a source buffer to a destination buffer, and returns the destination buffer.\r
\r
- If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then\r
- ASSERT().\r
+ This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r
+ DestinationBuffer. The implementation must be reentrant, and it must handle the case\r
+ where SourceBuffer overlaps DestinationBuffer.\r
+ \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 Destination Target of copy\r
- @param Source Place to copy from\r
- @param Length Number of bytes to copy\r
+ @param DestinationBuffer The pointer to the destination buffer of the memory copy.\r
+ @param SourceBuffer The pointer to the source buffer of the memory copy.\r
+ @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.\r
\r
- @return Destination\r
+ @return DestinationBuffer.\r
\r
**/\r
VOID *\r
EFIAPI\r
CopyMem (\r
- OUT VOID *Destination,\r
- IN CONST VOID *Source,\r
- IN UINTN Length\r
+ OUT VOID *DestinationBuffer,\r
+ IN CONST VOID *SourceBuffer,\r
+ IN UINTN Length\r
)\r
{\r
- ASSERT (\r
- Destination == NULL ||\r
- Length <= MAX_ADDRESS - (UINTN)Destination + 1\r
- );\r
- ASSERT (\r
- Source == NULL ||\r
- Length <= MAX_ADDRESS - (UINTN)Source + 1\r
- );\r
- if (Destination == Source || Length == 0) {\r
- return Destination;\r
+ if (Length == 0) {\r
+ return DestinationBuffer;\r
+ }\r
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r
+\r
+ if (DestinationBuffer == SourceBuffer) {\r
+ return DestinationBuffer;\r
}\r
- return InternalMemCopyMem (Destination, Source, Length);\r
+ return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);\r
}\r