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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.
**/
#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
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