mirror of https://github.com/acidanthera/audk.git
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/** @file
|
|
CopyMem() implementation.
|
|
|
|
The following BaseMemoryLib instances contain the same copy of this file:
|
|
|
|
BaseMemoryLib
|
|
BaseMemoryLibMmx
|
|
BaseMemoryLibSse2
|
|
BaseMemoryLibRepStr
|
|
BaseMemoryLibOptDxe
|
|
BaseMemoryLibOptPei
|
|
PeiMemoryLib
|
|
UefiMemoryLib
|
|
|
|
Copyright (c) 2006 - 2018, 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
|
|
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.
|
|
|
|
**/
|
|
|
|
#include "MemLibInternals.h"
|
|
|
|
/**
|
|
Copies a source buffer to a destination buffer, and returns the destination buffer.
|
|
|
|
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 DestinationBuffer The pointer to the destination buffer of the memory copy.
|
|
@param SourceBuffer The pointer to the source buffer of the memory copy.
|
|
@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
|
|
|
|
@return DestinationBuffer.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
CopyMem (
|
|
OUT VOID *DestinationBuffer,
|
|
IN CONST VOID *SourceBuffer,
|
|
IN UINTN Length
|
|
)
|
|
{
|
|
if (Length == 0) {
|
|
return DestinationBuffer;
|
|
}
|
|
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
|
|
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
|
|
|
|
if (DestinationBuffer == SourceBuffer) {
|
|
return DestinationBuffer;
|
|
}
|
|
return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);
|
|
}
|