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 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
