2 2009-04-15 : Igor Pavlov : Public domain */
\r
9 Byte XZ_SIG[XZ_SIG_SIZE] = { 0xFD, '7', 'z', 'X', 'Z', 0 };
\r
10 Byte XZ_FOOTER_SIG[XZ_FOOTER_SIG_SIZE] = { 'Y', 'Z' };
\r
12 unsigned Xz_WriteVarInt(Byte *buf, UInt64 v)
\r
17 buf[i++] = (Byte)((v & 0x7F) | 0x80);
\r
25 void Xz_Construct(CXzStream *p)
\r
27 p->numBlocks = p->numBlocksAllocated = 0;
\r
32 void Xz_Free(CXzStream *p, ISzAlloc *alloc)
\r
34 alloc->Free(alloc, p->blocks);
\r
35 p->numBlocks = p->numBlocksAllocated = 0;
\r
39 unsigned XzFlags_GetCheckSize(CXzStreamFlags f)
\r
41 int t = XzFlags_GetCheckType(f);
\r
42 return (t == 0) ? 0 : (4 << ((t - 1) / 3));
\r
45 void XzCheck_Init(CXzCheck *p, int mode)
\r
50 case XZ_CHECK_CRC32: p->crc = CRC_INIT_VAL; break;
\r
51 case XZ_CHECK_CRC64: p->crc64 = CRC64_INIT_VAL; break;
\r
52 case XZ_CHECK_SHA256: Sha256_Init(&p->sha); break;
\r
56 void XzCheck_Update(CXzCheck *p, const void *data, size_t size)
\r
60 case XZ_CHECK_CRC32: p->crc = CrcUpdate(p->crc, data, size); break;
\r
61 case XZ_CHECK_CRC64: p->crc64 = Crc64Update(p->crc64, data, size); break;
\r
62 case XZ_CHECK_SHA256: Sha256_Update(&p->sha, (const Byte *)data, size); break;
\r
66 int XzCheck_Final(CXzCheck *p, Byte *digest)
\r
70 case XZ_CHECK_CRC32:
\r
71 SetUi32(digest, CRC_GET_DIGEST(p->crc));
\r
73 case XZ_CHECK_CRC64:
\r
76 UInt64 v = CRC64_GET_DIGEST(p->crc64);
\r
77 for (i = 0; i < 8; i++, v >>= 8)
\r
78 digest[i] = (Byte)(v & 0xFF);
\r
81 case XZ_CHECK_SHA256:
\r
82 Sha256_Final(&p->sha, digest);
\r