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diff --git a/OldMdePkg/Include/Library/UefiDecompressLib.h b/OldMdePkg/Include/Library/UefiDecompressLib.h
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+/** @file
+  Return UEFI Decompress Protocol 
+
+  Copyright (c) 2006, Intel Corporation                                                         
+  All rights reserved. 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.             
+
+  Module Name:  UefiDecompressLib.h
+
+**/
+
+#ifndef __UEFI_DECPOMPRESS_LIB_H__
+#define __UEFI_DECPOMPRESS_LIB_H__
+
+/**
+  Retrieves the size of the uncompressed buffer and the size of the scratch buffer.
+
+  Retrieves the size of the uncompressed buffer and the temporary scratch buffer 
+  required to decompress the buffer specified by Source and SourceSize.
+  If the size of the uncompressed buffer or the size of the scratch buffer cannot
+  be determined from the compressed data specified by Source and SourceData, 
+  then RETURN_INVALID_PARAMETER is returned.  Otherwise, the size of the uncompressed
+  buffer is returned in DestinationSize, the size of the scratch buffer is returned
+  in ScratchSize, and RETURN_SUCCESS is returned.
+  This function does not have scratch buffer available to perform a thorough 
+  checking of the validity of the source data.  It just retrieves the "Original Size"
+  field from the beginning bytes of the source data and output it as DestinationSize.
+  And ScratchSize is specific to the decompression implementation.
+
+  If Source is NULL, then ASSERT().
+  If DestinationSize is NULL, then ASSERT().
+  If ScratchSize is NULL, then ASSERT().
+
+  @param  Source          The source buffer containing the compressed data.
+  @param  SourceSize      The size, in bytes, of the source buffer.
+  @param  DestinationSize A pointer to the size, in bytes, of the uncompressed buffer
+                          that will be generated when the compressed buffer specified
+                          by Source and SourceSize is decompressed..
+  @param  ScratchSize     A pointer to the size, in bytes, of the scratch buffer that
+                          is required to decompress the compressed buffer specified 
+                          by Source and SourceSize.
+
+  @retval  RETURN_SUCCESS The size of destination buffer and the size of scratch 
+                          buffer are successull retrieved.
+  @retval  RETURN_INVALID_PARAMETER The source data is corrupted
+
+**/
+RETURN_STATUS
+EFIAPI
+UefiDecompressGetInfo (
+  IN  CONST VOID  *Source,
+  IN  UINT32      SourceSize,
+  OUT UINT32      *DestinationSize,
+  OUT UINT32      *ScratchSize
+  );
+
+/**
+  Decompresses a compressed source buffer.
+
+  This function is designed so that the decompression algorithm can be implemented
+  without using any memory services.  As a result, this function is not allowed to
+  call any memory allocation services in its implementation.  It is the caller's r
+  esponsibility to allocate and free the Destination and Scratch buffers.
+  If the compressed source data specified by Source is sucessfully decompressed 
+  into Destination, then RETURN_SUCCESS is returned.  If the compressed source data 
+  specified by Source is not in a valid compressed data format,
+  then RETURN_INVALID_PARAMETER is returned.
+
+  If Source is NULL, then ASSERT().
+  If Destination is NULL, then ASSERT().
+  If the required scratch buffer size > 0 and Scratch is NULL, then ASSERT().
+
+  @param  Source      The source buffer containing the compressed data.
+  @param  Destination The destination buffer to store the decompressed data
+  @param  Scratch     A temporary scratch buffer that is used to perform the decompression.
+                      This is an optional parameter that may be NULL if the 
+                      required scratch buffer size is 0.
+                     
+  @retval  RETURN_SUCCESS Decompression is successfull
+  @retval  RETURN_INVALID_PARAMETER The source data is corrupted
+
+**/
+RETURN_STATUS
+EFIAPI
+UefiDecompress (
+  IN CONST VOID  *Source,
+  IN OUT VOID    *Destination,
+  IN OUT VOID    *Scratch
+  );
+
+#endif