1 /** @file
2 Implementation of IsZeroBuffer function.
3
4 The following BaseMemoryLib instances contain the same copy of this file:
5
6 BaseMemoryLib
7 BaseMemoryLibMmx
8 BaseMemoryLibSse2
9 BaseMemoryLibRepStr
10 BaseMemoryLibOptDxe
11 BaseMemoryLibOptPei
12 PeiMemoryLib
13 UefiMemoryLib
14
15 Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
16 This program and the accompanying materials
17 are licensed and made available under the terms and conditions of the BSD License
18 which accompanies this distribution. The full text of the license may be found at
19 http://opensource.org/licenses/bsd-license.php
20
21 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
22 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
23
24 **/
25
26 #include "MemLibInternals.h"
27
28 /**
29 Checks if the contents of a buffer are all zeros.
30
31 This function checks whether the contents of a buffer are all zeros. If the
32 contents are all zeros, return TRUE. Otherwise, return FALSE.
33
34 If Length > 0 and Buffer is NULL, then ASSERT().
35 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
36
37 @param Buffer The pointer to the buffer to be checked.
38 @param Length The size of the buffer (in bytes) to be checked.
39
40 @retval TRUE Contents of the buffer are all zeros.
41 @retval FALSE Contents of the buffer are not all zeros.
42
43 **/
44 BOOLEAN
45 EFIAPI
IsZeroBuffer(IN CONST VOID * Buffer,IN UINTN Length)46 IsZeroBuffer (
47 IN CONST VOID *Buffer,
48 IN UINTN Length
49 )
50 {
51 ASSERT (!(Buffer == NULL && Length > 0));
52 ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
53 return InternalMemIsZeroBuffer (Buffer, Length);
54 }
55