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56 lines
1.4 KiB
56 lines
1.4 KiB
/* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder |
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2009-08-14 : Igor Pavlov : Public domain */ |
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#include "Lzma86.h" |
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#include "Alloc.h" |
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#include "Bra.h" |
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#include "LzmaDec.h" |
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static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); } |
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static void SzFree(void *p, void *address) { p = p; MyFree(address); } |
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SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize) |
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{ |
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unsigned i; |
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if (srcLen < LZMA86_HEADER_SIZE) |
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return SZ_ERROR_INPUT_EOF; |
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*unpackSize = 0; |
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for (i = 0; i < sizeof(UInt64); i++) |
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*unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i); |
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return SZ_OK; |
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} |
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SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen) |
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{ |
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ISzAlloc g_Alloc = { SzAlloc, SzFree }; |
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SRes res; |
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int useFilter; |
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SizeT inSizePure; |
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ELzmaStatus status; |
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if (*srcLen < LZMA86_HEADER_SIZE) |
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return SZ_ERROR_INPUT_EOF; |
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useFilter = src[0]; |
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if (useFilter > 1) |
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{ |
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*destLen = 0; |
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return SZ_ERROR_UNSUPPORTED; |
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} |
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inSizePure = *srcLen - LZMA86_HEADER_SIZE; |
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res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure, |
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src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc); |
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*srcLen = inSizePure + LZMA86_HEADER_SIZE; |
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if (res != SZ_OK) |
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return res; |
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if (useFilter == 1) |
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{ |
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UInt32 x86State; |
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x86_Convert_Init(x86State); |
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x86_Convert(dest, *destLen, 0, &x86State, 0); |
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} |
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return SZ_OK; |
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}
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