mirror of https://github.com/acidanthera/audk.git
65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/** @file
|
||
ScanMem64() 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: ScanMem64Wrapper.c
|
||
|
||
The following BaseMemoryLib instances share the same version of this file:
|
||
|
||
BaseMemoryLib
|
||
BaseMemoryLibMmx
|
||
BaseMemoryLibSse2
|
||
BaseMemoryLibRepStr
|
||
PeiMemoryLib
|
||
UefiMemoryLib
|
||
|
||
**/
|
||
|
||
#include "MemLibInternals.h"
|
||
|
||
/**
|
||
Scans a target buffer for a 64-bit value, and returns a pointer to the matching 64-bit value
|
||
in the target buffer.
|
||
|
||
This function searches target the buffer specified by Buffer and Length from the lowest
|
||
address to the highest address for a 64-bit value that matches Value. If a match is found,
|
||
then a pointer to the matching byte in the target buffer is returned. If no match is found,
|
||
then NULL is returned. If Length is 0, then NULL is returned.
|
||
If Length > 0 and Buffer is NULL, then ASSERT().
|
||
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
|
||
If Length is greater than (MAX_ADDRESS – Buffer + 1), then ASSERT().
|
||
|
||
@param Buffer Pointer to the target buffer to scan.
|
||
@param Length Number of bytes in Buffer to scan.
|
||
@param Value Value to search for in the target buffer.
|
||
|
||
@return A pointer to the matching byte in the target buffer or NULL otherwise.
|
||
|
||
**/
|
||
VOID *
|
||
EFIAPI
|
||
ScanMem64 (
|
||
IN CONST VOID *Buffer,
|
||
IN UINTN Length,
|
||
IN UINT64 Value
|
||
)
|
||
{
|
||
if (Length == 0) {
|
||
return NULL;
|
||
}
|
||
|
||
ASSERT (Buffer != NULL);
|
||
ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
|
||
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
|
||
|
||
return (VOID*)InternalMemScanMem64 (Buffer, Length / sizeof (Value), Value);
|
||
}
|