mirror of https://github.com/acidanthera/audk.git
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
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/** @file
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ScanMem64() implementation.
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Copyright (c) 2006, Intel Corporation<BR>
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All rights reserved. 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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Module Name: ScanMem64Wrapper.c
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The following BaseMemoryLib instances share the same version of this file:
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BaseMemoryLib
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BaseMemoryLibMmx
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BaseMemoryLibSse2
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BaseMemoryLibRepStr
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PeiMemoryLib
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UefiMemoryLib
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**/
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#include "MemLibInternals.h"
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/**
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Scans a target buffer for a 64-bit value, and returns a pointer to the
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matching 64-bit value in the target buffer.
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This function searches target the buffer specified by Buffer and Length from
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the lowest address to the highest address at 64-bit increments for a 64-bit
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value that matches Value. If a match is found, then a pointer to the matching
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value in the target buffer is returned. If no match is found, then NULL is
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returned. If Length is 0, then NULL is returned.
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If Buffer is NULL, then ASSERT().
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If Buffer is not aligned on a 64-bit boundary, then ASSERT().
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If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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@param Buffer Pointer to the target buffer to scan.
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@param Length Number of bytes in Buffer to scan.
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@param Value Value to search for in the target buffer.
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@return Pointer to the first occurrence or NULL if not found.
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@retval NULL if Length == 0 or Value was not found.
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**/
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VOID *
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EFIAPI
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ScanMem64 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT64 Value
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)
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{
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ASSERT (Buffer != NULL);
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ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
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ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
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if ((Length /= sizeof (Value)) == 0) {
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return NULL;
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}
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return (VOID*)InternalMemScanMem64 (Buffer, Length, Value);
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}
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