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https://port.numenaute.org/aleajactaest/khanat-code-old.git
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80 lines
2 KiB
C++
80 lines
2 KiB
C++
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/* LzmaRamDecode.c */
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#include "LzmaRamDecode.h"
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#ifdef _SZ_ONE_DIRECTORY
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#include "LzmaDecode.h"
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#include "BranchX86.h"
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#else
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#include "../LZMA_C/LzmaDecode.h"
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#include "../Branch/BranchX86.h"
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#endif
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#define LZMA_PROPS_SIZE 14
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#define LZMA_SIZE_OFFSET 6
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int LzmaRamGetUncompressedSize(
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const unsigned char *inBuffer,
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size_t inSize,
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size_t *outSize)
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{
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unsigned int i;
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if (inSize < LZMA_PROPS_SIZE)
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return 1;
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*outSize = 0;
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for(i = 0; i < sizeof(size_t); i++)
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*outSize += ((size_t)inBuffer[LZMA_SIZE_OFFSET + i]) << (8 * i);
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for(; i < 8; i++)
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if (inBuffer[LZMA_SIZE_OFFSET + i] != 0)
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return 1;
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return 0;
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}
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#define SZE_DATA_ERROR (1)
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#define SZE_OUTOFMEMORY (2)
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int LzmaRamDecompress(
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const unsigned char *inBuffer,
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size_t inSize,
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unsigned char *outBuffer,
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size_t outSize,
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size_t *outSizeProcessed,
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void * (*allocFunc)(size_t size),
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void (*freeFunc)(void *))
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{
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CLzmaDecoderState state; /* it's about 24 bytes structure, if int is 32-bit */
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int result;
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SizeT outSizeProcessedLoc;
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SizeT inProcessed;
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int useFilter;
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if (inSize < LZMA_PROPS_SIZE)
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return 1;
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useFilter = inBuffer[0];
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*outSizeProcessed = 0;
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if (useFilter > 1)
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return 1;
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if (LzmaDecodeProperties(&state.Properties, inBuffer + 1, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK)
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return 1;
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state.Probs = (CProb *)allocFunc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
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if (state.Probs == 0)
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return SZE_OUTOFMEMORY;
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result = LzmaDecode(&state,
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inBuffer + LZMA_PROPS_SIZE, (SizeT)inSize - LZMA_PROPS_SIZE, &inProcessed,
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outBuffer, (SizeT)outSize, &outSizeProcessedLoc);
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freeFunc(state.Probs);
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if (result != LZMA_RESULT_OK)
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return 1;
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*outSizeProcessed = (size_t)outSizeProcessedLoc;
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if (useFilter == 1)
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{
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UInt32 _prevMask;
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UInt32 _prevPos;
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x86_Convert_Init(_prevMask, _prevPos);
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x86_Convert(outBuffer, (UInt32)outSizeProcessedLoc, 0, &_prevMask, &_prevPos, 0);
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}
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return 0;
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}
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