57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* 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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