4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/** @file
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ScanMem32() implementation.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The following BaseMemoryLib instances contain the same copy of this file:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLib
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLibMmx
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLibSse2
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLibRepStr
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLibOptDxe
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BaseMemoryLibOptPei
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync PeiMemoryLib
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UefiMemoryLib
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync which accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync http://opensource.org/licenses/bsd-license.php.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "MemLibInternals.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/**
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Scans a target buffer for a 32-bit value, and returns a pointer to the matching 32-bit value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync in the target buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This function searches the target buffer specified by Buffer and Length from the lowest
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync address to the highest address for a 32-bit value that matches Value. If a match is found,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync then a pointer to the matching byte in the target buffer is returned. If no match is found,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync then NULL is returned. If Length is 0, then NULL is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Length > 0 and Buffer is NULL, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Buffer is not aligned on a 32-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Length is not aligned on a 32-bit boundary, then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Buffer The pointer to the target buffer to scan.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Length The number of bytes in Buffer to scan.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The value to search for in the target buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return A pointer to the matching byte in the target buffer or NULL otherwise.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncVOID *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFIAPI
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncScanMem32 (
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN CONST VOID *Buffer,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINTN Length,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINT32 Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync )
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Length == 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT (Buffer != NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT ((Length & (sizeof (Value) - 1)) == 0);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (VOID*)InternalMemScanMem32 (Buffer, Length / sizeof (Value), Value);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}