mirror of https://github.com/acidanthera/audk.git
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/** @file
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CopyMem() implementation.
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Copyright (c) 2006, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name: CopyMemWrapper.c
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The following BaseMemoryLib instances share the same version of this file:
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BaseMemoryLib
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BaseMemoryLibMmx
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BaseMemoryLibSse2
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BaseMemoryLibRepStr
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PeiMemoryLib
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UefiMemoryLib
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**/
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#include "MemLibInternals.h"
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/**
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Copy Length bytes from Source to Destination.
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This function copies Length bytes from SourceBuffer to DestinationBuffer, and
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returns DestinationBuffer. The implementation must be reentrant, and it must
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handle the case where SourceBuffer overlaps DestinationBuffer.
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If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
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ASSERT().
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If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
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@param Destination Target of copy
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@param Source Place to copy from
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@param Length Number of bytes to copy
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@return Destination
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**/
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VOID *
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EFIAPI
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CopyMem (
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OUT VOID *Destination,
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IN CONST VOID *Source,
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IN UINTN Length
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)
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{
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ASSERT (
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Destination == NULL ||
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Length <= MAX_ADDRESS - (UINTN)Destination + 1
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);
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ASSERT (
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Source == NULL ||
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Length <= MAX_ADDRESS - (UINTN)Source + 1
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);
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if (Destination == Source || Length == 0) {
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return Destination;
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}
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return InternalMemCopyMem (Destination, Source, Length);
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}
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