mirror of
https://git.proxmox.com/git/mirror_edk2
synced 2025-11-04 11:29:11 +00:00
84b5877f02
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10409 6f19259b-4bc3-4df7-8a09-765794883524
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/** @file
|
|
ScanMem8() and ScanMemN() implementation.
|
|
|
|
The following BaseMemoryLib instances contain the same copy of this file:
|
|
|
|
BaseMemoryLib
|
|
BaseMemoryLibMmx
|
|
BaseMemoryLibSse2
|
|
BaseMemoryLibRepStr
|
|
BaseMemoryLibOptDxe
|
|
BaseMemoryLibOptPei
|
|
PeiMemoryLib
|
|
UefiMemoryLib
|
|
|
|
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
|
|
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.
|
|
|
|
**/
|
|
|
|
#include "MemLibInternals.h"
|
|
|
|
/**
|
|
Scans a target buffer for an 8-bit value, and returns a pointer to the matching 8-bit value
|
|
in the target buffer.
|
|
|
|
This function searches the target buffer specified by Buffer and Length from the lowest
|
|
address to the highest address for an 8-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 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
|
|
ScanMem8 (
|
|
IN CONST VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT8 Value
|
|
)
|
|
{
|
|
if (Length == 0) {
|
|
return NULL;
|
|
}
|
|
ASSERT (Buffer != NULL);
|
|
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
|
|
|
|
return (VOID*)InternalMemScanMem8 (Buffer, Length, Value);
|
|
}
|
|
|
|
/**
|
|
Scans a target buffer for a UINTN sized value, and returns a pointer to the matching
|
|
UINTN sized value in the target buffer.
|
|
|
|
This function searches the target buffer specified by Buffer and Length from the lowest
|
|
address to the highest address for a UINTN sized 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 UINTN boundary, then ASSERT().
|
|
If Length is not aligned on a UINTN 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
|
|
ScanMemN (
|
|
IN CONST VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINTN Value
|
|
)
|
|
{
|
|
if (sizeof (UINTN) == sizeof (UINT64)) {
|
|
return ScanMem64 (Buffer, Length, (UINT64)Value);
|
|
} else {
|
|
return ScanMem32 (Buffer, Length, (UINT32)Value);
|
|
}
|
|
}
|
|
|