| 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 |