repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder
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| 2 | 2009-08-14 : Igor Pavlov : Public domain */
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| 3 |
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| 4 | #include "Lzma86.h"
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| 5 |
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| 6 | #include "Alloc.h"
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| 7 | #include "Bra.h"
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| 8 | #include "LzmaDec.h"
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| 9 |
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| 10 | static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
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| 11 | static void SzFree(void *p, void *address) { p = p; MyFree(address); }
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| 12 |
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| 13 | SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize)
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| 14 | {
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| 15 | unsigned i;
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| 16 | if (srcLen < LZMA86_HEADER_SIZE)
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| 17 | return SZ_ERROR_INPUT_EOF;
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| 18 | *unpackSize = 0;
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| 19 | for (i = 0; i < sizeof(UInt64); i++)
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| 20 | *unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i);
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| 21 | return SZ_OK;
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| 22 | }
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| 23 |
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| 24 | SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen)
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| 25 | {
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| 26 | ISzAlloc g_Alloc = { SzAlloc, SzFree };
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| 27 | SRes res;
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| 28 | int useFilter;
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| 29 | SizeT inSizePure;
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| 30 | ELzmaStatus status;
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| 31 |
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| 32 | if (*srcLen < LZMA86_HEADER_SIZE)
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| 33 | return SZ_ERROR_INPUT_EOF;
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| 34 |
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| 35 | useFilter = src[0];
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| 36 |
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| 37 | if (useFilter > 1)
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| 38 | {
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| 39 | *destLen = 0;
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| 40 | return SZ_ERROR_UNSUPPORTED;
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| 41 | }
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| 42 |
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| 43 | inSizePure = *srcLen - LZMA86_HEADER_SIZE;
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| 44 | res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure,
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| 45 | src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc);
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| 46 | *srcLen = inSizePure + LZMA86_HEADER_SIZE;
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| 47 | if (res != SZ_OK)
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| 48 | return res;
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| 49 | if (useFilter == 1)
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| 50 | {
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| 51 | UInt32 x86State;
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| 52 | x86_Convert_Init(x86State);
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| 53 | x86_Convert(dest, *destLen, 0, &x86State, 0);
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| 54 | }
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| 55 | return SZ_OK;
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| 56 | }
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