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117 lines
5.2 KiB
C
117 lines
5.2 KiB
C
/** @file
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The Decompress Protocol Interface as defined in UEFI spec
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __DECOMPRESS_H__
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#define __DECOMPRESS_H__
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#define EFI_DECOMPRESS_PROTOCOL_GUID \
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{ \
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0xd8117cfe, 0x94a6, 0x11d4, {0x9a, 0x3a, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
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}
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typedef struct _EFI_DECOMPRESS_PROTOCOL EFI_DECOMPRESS_PROTOCOL;
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/**
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The GetInfo() function retrieves the size of the uncompressed buffer
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and the temporary scratch buffer required to decompress the buffer
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specified by Source and SourceSize. If the size of the uncompressed
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buffer or the size of the scratch buffer cannot be determined from
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the compressed data specified by Source and SourceData, then
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EFI_INVALID_PARAMETER is returned. Otherwise, the size of the uncompressed
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buffer is returned in DestinationSize, the size of the scratch buffer is
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returned in ScratchSize, and EFI_SUCCESS is returned.
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The GetInfo() function does not have a scratch buffer available to perform
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a thorough checking of the validity of the source data. It just retrieves
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the 'Original Size' field from the beginning bytes of the source data and
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output it as DestinationSize. And ScratchSize is specific to the decompression
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implementation.
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@param This A pointer to the EFI_DECOMPRESS_PROTOCOL instance.
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@param Source The source buffer containing the compressed data.
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@param SourceSize The size, in bytes, of source buffer.
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@param DestinationSize A pointer to the size, in bytes, of the uncompressed buffer
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that will be generated when the compressed buffer specified
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by Source and SourceSize is decompressed.
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@param ScratchSize A pointer to the size, in bytes, of the scratch buffer that
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is required to decompress the compressed buffer specified by
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Source and SourceSize.
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@retval EFI_SUCCESS The size of the uncompressed data was returned in DestinationSize
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and the size of the scratch buffer was returned in ScratchSize.
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@retval EFI_INVALID_PARAMETER The size of the uncompressed data or the size of the scratch
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buffer cannot be determined from the compressed data specified by
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Source and SourceData.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DECOMPRESS_GET_INFO)(
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IN EFI_DECOMPRESS_PROTOCOL *This,
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IN VOID *Source,
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IN UINT32 SourceSize,
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OUT UINT32 *DestinationSize,
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OUT UINT32 *ScratchSize
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);
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/**
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The Decompress() function extracts decompressed data to its original form.
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This protocol is designed so that the decompression algorithm can be
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implemented without using any memory services. As a result, the
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Decompress() function is not allowed to call AllocatePool() or
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AllocatePages() in its implementation. It is the caller's responsibility
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to allocate and free the Destination and Scratch buffers.
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If the compressed source data specified by Source and SourceSize is
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successfully decompressed into Destination, then EFI_SUCCESS is returned.
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If the compressed source data specified by Source and SourceSize is not in
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a valid compressed data format, then EFI_INVALID_PARAMETER is returned.
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@param This A pointer to the EFI_DECOMPRESS_PROTOCOL instance.
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@param Source The source buffer containing the compressed data.
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@param SourceSize The size of source data.
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@param Destination On output, the destination buffer that contains
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the uncompressed data.
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@param DestinationSize The size of destination buffer. The size of destination
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buffer needed is obtained from GetInfo().
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@param Scratch A temporary scratch buffer that is used to perform the
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decompression.
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@param ScratchSize The size of scratch buffer. The size of scratch buffer needed
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is obtained from GetInfo().
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@retval EFI_SUCCESS Decompression completed successfully, and the uncompressed
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buffer is returned in Destination.
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@retval EFI_INVALID_PARAMETER The source buffer specified by Source and SourceSize is
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corrupted (not in a valid compressed format).
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DECOMPRESS_DECOMPRESS)(
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IN EFI_DECOMPRESS_PROTOCOL *This,
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IN VOID *Source,
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IN UINT32 SourceSize,
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IN OUT VOID *Destination,
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IN UINT32 DestinationSize,
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IN OUT VOID *Scratch,
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IN UINT32 ScratchSize
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);
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///
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/// Provides a decompression service.
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///
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struct _EFI_DECOMPRESS_PROTOCOL {
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EFI_DECOMPRESS_GET_INFO GetInfo;
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EFI_DECOMPRESS_DECOMPRESS Decompress;
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};
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extern EFI_GUID gEfiDecompressProtocolGuid;
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#endif
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