mirror of
https://git.proxmox.com/git/mirror_edk2
synced 2025-11-04 07:34:13 +00:00
24de7645e8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@168 6f19259b-4bc3-4df7-8a09-765794883524
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/** @file
|
|
CompareMem() 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: CompareMemWrapper.c
|
|
|
|
The following BaseMemoryLib instances share the same version of this file:
|
|
|
|
BaseMemoryLib
|
|
BaseMemoryLibMmx
|
|
BaseMemoryLibSse2
|
|
BaseMemoryLibRepStr
|
|
PeiMemoryLib
|
|
UefiMemoryLib
|
|
|
|
**/
|
|
|
|
#include "MemLibInternals.h"
|
|
|
|
/**
|
|
Compares two memory buffers of a given length.
|
|
|
|
This function compares Length bytes of SourceBuffer to Length bytes of
|
|
DestinationBuffer. If all Length bytes of the two buffers are identical, then
|
|
0 is returned. Otherwise, the value returned is the first mismatched byte in
|
|
SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.
|
|
|
|
If DestinationBuffer is NULL and Length > 0, then ASSERT().
|
|
If SourceBuffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
|
|
ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
|
|
|
|
@param DestinationBuffer First memory buffer
|
|
@param SourceBuffer Second memory buffer
|
|
@param Length Length of DestinationBuffer and SourceBuffer memory
|
|
regions to compare
|
|
|
|
@retval 0 if DestinationBuffer == SourceBuffer
|
|
@retval Non-zero if DestinationBuffer != SourceBuffer
|
|
|
|
**/
|
|
INTN
|
|
EFIAPI
|
|
CompareMem (
|
|
IN CONST VOID *DestinationBuffer,
|
|
IN CONST VOID *SourceBuffer,
|
|
IN UINTN Length
|
|
)
|
|
{
|
|
ASSERT (DestinationBuffer != NULL);
|
|
ASSERT (SourceBuffer != NULL);
|
|
ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);
|
|
ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);
|
|
if (Length == 0) {
|
|
return 0;
|
|
}
|
|
return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);
|
|
}
|