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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 99 | pmbaty | 1 | /* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder |
| 2 | 2008-04-07 |
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| 3 | Igor Pavlov |
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| 4 | Public domain */ |
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| 5 | |||
| 6 | #include "Lzma86Dec.h" |
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| 7 | |||
| 8 | #include "Alloc.h" |
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| 9 | #include "Bra.h" |
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| 10 | #include "LzmaDec.h" |
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| 11 | |||
| 12 | #define LZMA86_SIZE_OFFSET (1 + LZMA_PROPS_SIZE) |
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| 13 | #define LZMA86_HEADER_SIZE (LZMA86_SIZE_OFFSET + 8) |
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| 14 | |||
| 15 | static void *SzAlloc(void *p, size_t size) { return MyAlloc(size); } |
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| 16 | static void SzFree(void *p, void *address) { MyFree(address); } |
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| 17 | static ISzAlloc g_Alloc = { SzAlloc, SzFree }; |
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| 18 | |||
| 19 | SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize) |
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| 20 | { |
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| 21 | unsigned i; |
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| 22 | if (srcLen < LZMA86_HEADER_SIZE) |
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| 23 | return SZ_ERROR_INPUT_EOF; |
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| 24 | *unpackSize = 0; |
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| 25 | for (i = 0; i < sizeof(UInt64); i++) |
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| 26 | *unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i); |
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| 27 | return SZ_OK; |
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| 28 | } |
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| 29 | |||
| 30 | SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen) |
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| 31 | { |
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| 32 | SRes res; |
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| 33 | int useFilter; |
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| 34 | SizeT inSizePure; |
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| 35 | ELzmaStatus status; |
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| 36 | |||
| 37 | if (*srcLen < LZMA86_HEADER_SIZE) |
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| 38 | return SZ_ERROR_INPUT_EOF; |
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| 39 | |||
| 40 | useFilter = src[0]; |
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| 41 | |||
| 42 | if (useFilter > 1) |
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| 43 | { |
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| 44 | *destLen = 0; |
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| 45 | return SZ_ERROR_UNSUPPORTED; |
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| 46 | } |
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| 47 | |||
| 48 | inSizePure = *srcLen - LZMA86_HEADER_SIZE; |
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| 49 | res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure, |
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| 50 | src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc); |
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| 51 | *srcLen = inSizePure + LZMA86_HEADER_SIZE; |
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| 52 | if (res != SZ_OK) |
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| 53 | return res; |
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| 54 | if (useFilter == 1) |
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| 55 | { |
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| 56 | UInt32 x86State; |
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| 57 | x86_Convert_Init(x86State); |
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| 58 | x86_Convert(dest, *destLen, 0, &x86State, 0); |
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| 59 | } |
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| 60 | return SZ_OK; |
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| 61 | } |