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/** @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);
}
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