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MdePkg BaseMemoryLib: Add C implementation of API IsZeroBuffer()

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Add the implementation of API IsZeroBuffer() via C language for the
following library instances:
BaseMemoryLib
PeiMemoryLib
UefiMemoryLib

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Hao Wu
2016-08-17 14:24:04 +08:00
parent bce0133b7f
commit 1944b02b03
13 changed files with 335 additions and 9 deletions
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31
MdePkg/Library/BaseMemoryLib/MemLibGeneric.c
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@@ -6,7 +6,7 @@
PeiMemoryLib
UefiMemoryLib
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 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
@@ -262,3 +262,32 @@ InternalMemScanMem64 (
} while (--Length != 0);
return NULL;
}
/**
Checks whether the contents of a buffer are all zeros.
@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
InternalMemIsZeroBuffer (
IN CONST VOID *Buffer,
IN UINTN Length
)
{
CONST UINT8 *BufferData;
UINTN Index;
BufferData = Buffer;
for (Index = 0; Index < Length; Index++) {
if (BufferData[Index] != 0) {
return FALSE;
}
}
return TRUE;
}