2281eb6f48
Problems have been encountered because some of the source files have execute permission set. This can cause git to report them as changed when they are checked out onto a file system with inherited permissions. This has been seen using Cygwin, MinGW and PowerShell Git. This patch makes no change to source file content, and only aims to correct the file modes/permissions. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Evan Lloyd <evan.lloyd@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19778 6f19259b-4bc3-4df7-8a09-765794883524
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/** @file
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Implementation of the InternalMemCopyMem routine. This function is broken
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out into its own source file so that it can be excluded from a build for a
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particular platform easily if an optimized version is desired.
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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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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**/
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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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@param DestinationBuffer Target of copy
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@param SourceBuffer 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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InternalMemCopyMem (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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)
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{
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//
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// Declare the local variables that actually move the data elements as
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// volatile to prevent the optimizer from replacing this function with
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// the intrinsic memcpy()
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//
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volatile UINT8 *Destination8;
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CONST UINT8 *Source8;
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if (SourceBuffer > DestinationBuffer) {
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Destination8 = (UINT8*)DestinationBuffer;
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Source8 = (CONST UINT8*)SourceBuffer;
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while (Length-- != 0) {
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*(Destination8++) = *(Source8++);
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}
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} else if (SourceBuffer < DestinationBuffer) {
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Destination8 = (UINT8*)DestinationBuffer + Length;
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Source8 = (CONST UINT8*)SourceBuffer + Length;
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while (Length-- != 0) {
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*(--Destination8) = *(--Source8);
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}
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}
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return DestinationBuffer;
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}
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