audk/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c

/** @file
  Implementation of IsZeroBuffer function.

  The following BaseMemoryLib instances contain the same copy of this file:

    BaseMemoryLib
    BaseMemoryLibMmx
    BaseMemoryLibSse2
    BaseMemoryLibRepStr
    BaseMemoryLibOptDxe
    BaseMemoryLibOptPei
    PeiMemoryLib
    UefiMemoryLib

  Copyright (c) 2016, 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"

/**
  Checks if the contents of a buffer are all zeros.

  This function checks whether the contents of a buffer are all zeros. If the
  contents are all zeros, return TRUE. Otherwise, return FALSE.

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

  @param  Buffer      The pointer to the buffer to be checked.
  @param  Length      The size of the buffer (in bytes) to be checked.

  @retval TRUE        Contents of the buffer are all zeros.
  @retval FALSE       Contents of the buffer are not all zeros.

**/
BOOLEAN
EFIAPI
IsZeroBuffer (
  IN CONST VOID  *Buffer,
  IN UINTN       Length
  )
{
  ASSERT (!(Buffer == NULL && Length > 0));
  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
  return InternalMemIsZeroBuffer (Buffer, Length);
}