/** @file | |
CopyMem() 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: CopyMemWrapper.c | |
The following BaseMemoryLib instances share the same version of this file: | |
BaseMemoryLib | |
BaseMemoryLibMmx | |
BaseMemoryLibSse2 | |
BaseMemoryLibRepStr | |
PeiMemoryLib | |
UefiMemoryLib | |
**/ | |
#include "MemLibInternals.h" | |
/** | |
Copy Length bytes from Source to Destination. | |
This function copies Length bytes from SourceBuffer to DestinationBuffer, and | |
returns DestinationBuffer. The implementation must be reentrant, and it must | |
handle the case where SourceBuffer overlaps DestinationBuffer. | |
If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then | |
ASSERT(). | |
If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). | |
@param Destination Target of copy | |
@param Source Place to copy from | |
@param Length Number of bytes to copy | |
@return Destination | |
**/ | |
VOID * | |
EFIAPI | |
CopyMem ( | |
OUT VOID *Destination, | |
IN CONST VOID *Source, | |
IN UINTN Length | |
) | |
{ | |
ASSERT ( | |
Destination == NULL || | |
Length <= MAX_ADDRESS - (UINTN)Destination + 1 | |
); | |
ASSERT ( | |
Source == NULL || | |
Length <= MAX_ADDRESS - (UINTN)Source + 1 | |
); | |
if (Destination == Source || Length == 0) { | |
return Destination; | |
} | |
return InternalMemCopyMem (Destination, Source, Length); | |
} |