9e052883 |
1 | /* Lzma86Dec.c -- LZMA + x86 (BCJ) Filter Decoder\r |
2 | 2016-05-16 : Igor Pavlov : Public domain */\r |
3 | \r |
4 | #include "Precomp.h"\r |
5 | \r |
6 | #include "Lzma86.h"\r |
7 | \r |
8 | #include "Alloc.h"\r |
9 | #include "Bra.h"\r |
10 | #include "LzmaDec.h"\r |
11 | \r |
12 | SRes Lzma86_GetUnpackSize(const Byte *src, SizeT srcLen, UInt64 *unpackSize)\r |
13 | {\r |
14 | unsigned i;\r |
15 | if (srcLen < LZMA86_HEADER_SIZE)\r |
16 | return SZ_ERROR_INPUT_EOF;\r |
17 | *unpackSize = 0;\r |
18 | for (i = 0; i < sizeof(UInt64); i++)\r |
19 | *unpackSize += ((UInt64)src[LZMA86_SIZE_OFFSET + i]) << (8 * i);\r |
20 | return SZ_OK;\r |
21 | }\r |
22 | \r |
23 | SRes Lzma86_Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen)\r |
24 | {\r |
25 | SRes res;\r |
26 | int useFilter;\r |
27 | SizeT inSizePure;\r |
28 | ELzmaStatus status;\r |
29 | \r |
30 | if (*srcLen < LZMA86_HEADER_SIZE)\r |
31 | return SZ_ERROR_INPUT_EOF;\r |
32 | \r |
33 | useFilter = src[0];\r |
34 | \r |
35 | if (useFilter > 1)\r |
36 | {\r |
37 | *destLen = 0;\r |
38 | return SZ_ERROR_UNSUPPORTED;\r |
39 | }\r |
40 | \r |
41 | inSizePure = *srcLen - LZMA86_HEADER_SIZE;\r |
42 | res = LzmaDecode(dest, destLen, src + LZMA86_HEADER_SIZE, &inSizePure,\r |
43 | src + 1, LZMA_PROPS_SIZE, LZMA_FINISH_ANY, &status, &g_Alloc);\r |
44 | *srcLen = inSizePure + LZMA86_HEADER_SIZE;\r |
45 | if (res != SZ_OK)\r |
46 | return res;\r |
47 | if (useFilter == 1)\r |
48 | {\r |
49 | UInt32 x86State;\r |
50 | x86_Convert_Init(x86State);\r |
51 | x86_Convert(dest, *destLen, 0, &x86State, 0);\r |
52 | }\r |
53 | return SZ_OK;\r |
54 | }\r |