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https://github.com/Xevion/easy7zip.git
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89 lines
2.1 KiB
C
Executable File
89 lines
2.1 KiB
C
Executable File
/* 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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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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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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int lc, lp, pb;
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size_t lzmaInternalSize;
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void *lzmaInternalData;
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int result;
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UInt32 outSizeProcessedLoc;
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int 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 (inSize < LZMA_PROPS_SIZE)
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return 1;
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lc = inBuffer[1];
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if (lc >= (9 * 5 * 5))
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return 1;
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for (pb = 0; lc >= (9 * 5); pb++, lc -= (9 * 5));
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for (lp = 0; lc >= 9; lp++, lc -= 9);
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lzmaInternalSize = (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp))) * sizeof(CProb);
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lzmaInternalData = allocFunc(lzmaInternalSize);
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if (lzmaInternalData == 0)
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return SZE_OUTOFMEMORY;
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result = LzmaDecode((unsigned char *)lzmaInternalData, (UInt32)lzmaInternalSize,
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lc, lp, pb,
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inBuffer + LZMA_PROPS_SIZE, (UInt32)inSize - LZMA_PROPS_SIZE,
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outBuffer, (UInt32)outSize,
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&outSizeProcessedLoc);
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freeFunc(lzmaInternalData);
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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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