CompareMemWrapper.c File Reference

#include "MemLibInternals.h"

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Functions
INTN EFIAPI	CompareMem (IN CONST VOID *DestinationBuffer, IN CONST VOID *SourceBuffer, IN UINTN Length)

Detailed Description

CompareMem() implementation.

The following BaseMemoryLib instances contain the same copy of this file: BaseMemoryLib BaseMemoryLibMmx BaseMemoryLibSse2 BaseMemoryLibRepStr BaseMemoryLibOptDxe BaseMemoryLibOptPei PeiMemoryLib UefiMemoryLib

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CompareMemWrapper.c.

Function Documentation

CompareMem()

INTN EFIAPI CompareMem	(	IN CONST VOID *	DestinationBuffer,
		IN CONST VOID *	SourceBuffer,
		IN UINTN	Length
	)

Compares the contents of two buffers.

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 Length > 0 and DestinationBuffer is NULL, then ASSERT(). If Length > 0 and SourceBuffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().

Parameters

DestinationBuffer	The pointer to the destination buffer to compare.
SourceBuffer	The pointer to the source buffer to compare.
Length	The number of bytes to compare.

Returns

0 All Length bytes of the two buffers are identical.

Return values

Non-zero

The first mismatched byte in SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.

Definition at line 45 of file CompareMemWrapper.c.