You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
4.9 KiB
109 lines
4.9 KiB
4 years ago
|
/** @file
|
||
|
|
Provides services to decompress a buffer using the UEFI Decompress algorithm.
|
||
|
|
|
||
|
|
The UEFI Decompress Library enables the decompression of objects that
|
||
|
|
were compressed using the UEFI compression scheme. The UEFI Decompress
|
||
|
|
Library is independent of environment and requires the caller to allocate
|
||
|
|
all required memory buffers.
|
||
|
|
|
||
|
|
Copyright (c) 2006 - 2018, 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
|
||
|
|
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__
|
||
|
|
|
||
|
|
/**
|
||
|
|
Given a compressed source buffer, this function retrieves the size of
|
||
|
|
the uncompressed buffer and the size of the scratch buffer required
|
||
|
|
to decompress the compressed source 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 the uncompressed data was returned
|
||
|
|
in DestinationSize and the size of the scratch
|
||
|
|
buffer was returned in ScratchSize.
|
||
|
|
@retval RETURN_INVALID_PARAMETER
|
||
|
|
The size of the uncompressed data or the size of
|
||
|
|
the scratch buffer cannot be determined from
|
||
|
|
the compressed data specified by Source
|
||
|
|
and SourceSize.
|
||
|
|
**/
|
||
|
|
RETURN_STATUS
|
||
|
|
EFIAPI
|
||
|
|
UefiDecompressGetInfo (
|
||
|
|
IN CONST VOID *Source,
|
||
|
|
IN UINT32 SourceSize,
|
||
|
|
OUT UINT32 *DestinationSize,
|
||
|
|
OUT UINT32 *ScratchSize
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Decompresses a compressed source buffer.
|
||
|
|
|
||
|
|
Extracts decompressed data to its original form.
|
||
|
|
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
|
||
|
|
responsibility to allocate and free the Destination and Scratch buffers.
|
||
|
|
If the compressed source data specified by Source is successfully 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 completed successfully, and
|
||
|
|
the uncompressed buffer is returned in Destination.
|
||
|
|
@retval RETURN_INVALID_PARAMETER
|
||
|
|
The source buffer specified by Source is corrupted
|
||
|
|
(not in a valid compressed format).
|
||
|
|
**/
|
||
|
|
RETURN_STATUS
|
||
|
|
EFIAPI
|
||
|
|
UefiDecompress (
|
||
|
|
IN CONST VOID *Source,
|
||
|
|
IN OUT VOID *Destination,
|
||
|
|
IN OUT VOID *Scratch OPTIONAL
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif
|