+++ /dev/null
-/** @file\r
- LZMA Decompress interfaces\r
-\r
- Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r
- SPDX-License-Identifier: BSD-2-Clause-Patent\r
-\r
-**/\r
-\r
-#include "LzmaDecompressLibInternal.h"\r
-#include "Sdk/C/7zTypes.h"\r
-#include "Sdk/C/7zVersion.h"\r
-#include "Sdk/C/LzmaDec.h"\r
-\r
-#define SCRATCH_BUFFER_REQUEST_SIZE SIZE_64KB\r
-\r
-typedef struct\r
-{\r
- ISzAlloc Functions;\r
- VOID *Buffer;\r
- UINTN BufferSize;\r
-} ISzAllocWithData;\r
-\r
-/**\r
- Allocation routine used by LZMA decompression.\r
-\r
- @param P Pointer to the ISzAlloc instance\r
- @param Size The size in bytes to be allocated\r
-\r
- @return The allocated pointer address, or NULL on failure\r
-**/\r
-VOID *\r
-SzAlloc (\r
- CONST ISzAlloc *P,\r
- size_t Size\r
- )\r
-{\r
- VOID *Addr;\r
- ISzAllocWithData *Private;\r
-\r
- Private = (ISzAllocWithData*) P;\r
-\r
- if (Private->BufferSize >= Size) {\r
- Addr = Private->Buffer;\r
- Private->Buffer = (VOID*) ((UINT8*)Addr + Size);\r
- Private->BufferSize -= Size;\r
- return Addr;\r
- } else {\r
- ASSERT (FALSE);\r
- return NULL;\r
- }\r
-}\r
-\r
-/**\r
- Free routine used by LZMA decompression.\r
-\r
- @param P Pointer to the ISzAlloc instance\r
- @param Address The address to be freed\r
-**/\r
-VOID\r
-SzFree (\r
- CONST ISzAlloc *P,\r
- VOID *Address\r
- )\r
-{\r
- //\r
- // We use the 'scratch buffer' for allocations, so there is no free\r
- // operation required. The scratch buffer will be freed by the caller\r
- // of the decompression code.\r
- //\r
-}\r
-\r
-#define LZMA_HEADER_SIZE (LZMA_PROPS_SIZE + 8)\r
-\r
-/**\r
- Get the size of the uncompressed buffer by parsing EncodeData header.\r
-\r
- @param EncodedData Pointer to the compressed data.\r
-\r
- @return The size of the uncompressed buffer.\r
-**/\r
-UINT64\r
-GetDecodedSizeOfBuf(\r
- UINT8 *EncodedData\r
- )\r
-{\r
- UINT64 DecodedSize;\r
- INTN Index;\r
-\r
- /* Parse header */\r
- DecodedSize = 0;\r
- for (Index = LZMA_PROPS_SIZE + 7; Index >= LZMA_PROPS_SIZE; Index--)\r
- DecodedSize = LShiftU64(DecodedSize, 8) + EncodedData[Index];\r
-\r
- return DecodedSize;\r
-}\r
-\r
-//\r
-// LZMA functions and data as defined in local LzmaDecompressLibInternal.h\r
-//\r
-\r
-/**\r
- Given a Lzma compressed source buffer, this function retrieves the size of\r
- the uncompressed buffer and the size of the scratch buffer required\r
- to decompress the compressed source buffer.\r
-\r
- Retrieves the size of the uncompressed buffer and the temporary scratch buffer\r
- required to decompress the buffer specified by Source and SourceSize.\r
- The size of the uncompressed buffer is returned in DestinationSize,\r
- the size of the scratch buffer is returned in ScratchSize, and RETURN_SUCCESS is returned.\r
- This function does not have scratch buffer available to perform a thorough\r
- checking of the validity of the source data. It just retrieves the "Original Size"\r
- field from the LZMA_HEADER_SIZE beginning bytes of the source data and output it as DestinationSize.\r
- And ScratchSize is specific to the decompression implementation.\r
-\r
- If SourceSize is less than LZMA_HEADER_SIZE, then ASSERT().\r
-\r
- @param Source The source buffer containing the compressed data.\r
- @param SourceSize The size, in bytes, of the source buffer.\r
- @param DestinationSize A pointer to the size, in bytes, of the uncompressed buffer\r
- that will be generated when the compressed buffer specified\r
- by Source and SourceSize is decompressed.\r
- @param ScratchSize A pointer to the size, in bytes, of the scratch buffer that\r
- is required to decompress the compressed buffer specified\r
- by Source and SourceSize.\r
-\r
- @retval RETURN_SUCCESS The size of the uncompressed data was returned\r
- in DestinationSize and the size of the scratch\r
- buffer was returned in ScratchSize.\r
-\r
-**/\r
-RETURN_STATUS\r
-EFIAPI\r
-LzmaUefiDecompressGetInfo (\r
- IN CONST VOID *Source,\r
- IN UINT32 SourceSize,\r
- OUT UINT32 *DestinationSize,\r
- OUT UINT32 *ScratchSize\r
- )\r
-{\r
- UInt64 DecodedSize;\r
-\r
- ASSERT(SourceSize >= LZMA_HEADER_SIZE);\r
-\r
- DecodedSize = GetDecodedSizeOfBuf((UINT8*)Source);\r
-\r
- *DestinationSize = (UINT32)DecodedSize;\r
- *ScratchSize = SCRATCH_BUFFER_REQUEST_SIZE;\r
- return RETURN_SUCCESS;\r
-}\r
-\r
-/**\r
- Decompresses a Lzma compressed source buffer.\r
-\r
- Extracts decompressed data to its original form.\r
- If the compressed source data specified by Source is successfully decompressed\r
- into Destination, then RETURN_SUCCESS is returned. If the compressed source data\r
- specified by Source is not in a valid compressed data format,\r
- then RETURN_INVALID_PARAMETER is returned.\r
-\r
- @param Source The source buffer containing the compressed data.\r
- @param SourceSize The size of source buffer.\r
- @param Destination The destination buffer to store the decompressed data\r
- @param Scratch A temporary scratch buffer that is used to perform the decompression.\r
- This is an optional parameter that may be NULL if the\r
- required scratch buffer size is 0.\r
-\r
- @retval RETURN_SUCCESS Decompression completed successfully, and\r
- the uncompressed buffer is returned in Destination.\r
- @retval RETURN_INVALID_PARAMETER\r
- The source buffer specified by Source is corrupted\r
- (not in a valid compressed format).\r
-**/\r
-RETURN_STATUS\r
-EFIAPI\r
-LzmaUefiDecompress (\r
- IN CONST VOID *Source,\r
- IN UINTN SourceSize,\r
- IN OUT VOID *Destination,\r
- IN OUT VOID *Scratch\r
- )\r
-{\r
- SRes LzmaResult;\r
- ELzmaStatus Status;\r
- SizeT DecodedBufSize;\r
- SizeT EncodedDataSize;\r
- ISzAllocWithData AllocFuncs;\r
-\r
- AllocFuncs.Functions.Alloc = SzAlloc;\r
- AllocFuncs.Functions.Free = SzFree;\r
- AllocFuncs.Buffer = Scratch;\r
- AllocFuncs.BufferSize = SCRATCH_BUFFER_REQUEST_SIZE;\r
-\r
- DecodedBufSize = (SizeT)GetDecodedSizeOfBuf((UINT8*)Source);\r
- EncodedDataSize = (SizeT) (SourceSize - LZMA_HEADER_SIZE);\r
-\r
- LzmaResult = LzmaDecode(\r
- Destination,\r
- &DecodedBufSize,\r
- (Byte*)((UINT8*)Source + LZMA_HEADER_SIZE),\r
- &EncodedDataSize,\r
- Source,\r
- LZMA_PROPS_SIZE,\r
- LZMA_FINISH_END,\r
- &Status,\r
- &(AllocFuncs.Functions)\r
- );\r
-\r
- if (LzmaResult == SZ_OK) {\r
- return RETURN_SUCCESS;\r
- } else {\r
- return RETURN_INVALID_PARAMETER;\r
- }\r
-}\r
-\r
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