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Modify the file format further to make all block header information only encode the number of bytes determined in chunk_bytes instead of 8 full bytes all the time.

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This commit is contained in:
Con Kolivas 2011-03-18 23:18:36 +11:00
parent 5005c2dff5
commit 63fb1bafea
5 changed files with 104 additions and 92 deletions
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36
doc/magic.header.txt
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@ -5,8 +5,8 @@ Con Kolivas
Byte Content
0-23 Magic
---
24->83 Rzip chunk data
84+ Data blocks
24+ Rzip Chunk Data (RCD)
RCD+ Data blocks
--- repeat
(end-MD5_DIGEST_SIZE)->(end) md5 hash
@ -24,19 +24,19 @@ Encrypted salt (bytes 6->14 in magic if encrypted):
0->1 Encoded number of loops to hash password
2->7 Random data
Rzip chunk data:
0 Data offsets byte width
1 Flag that there is another chunk beyond this
2->9 Chunk decompressed size
10->34 Stream 0 header data
35->59 Stream 1 header data
Rzip Chunk Ddata:
0 Data offsets byte width (meaning length is < (2 * 8)^RCD0)
1 Flag that there is no chunk beyond this
(RCD0 bytes) Chunk decompressed size
XX Stream 0 header data
XX Stream 1 header data
Stream Header Data:
Byte:
0 Compressed data type
1->8 Compressed data length
9->16 Uncompressed data length
17->24 Next block head
(RCD0 bytes) Compressed data length
(RCD0 bytes) Uncompressed data length
(RCD0 bytes) Next block head
Data blocks:
0->(end-2) data
@ -48,9 +48,9 @@ March 2011
Con Kolivas
Byte Content
0->22 Magic
0->23 Magic
--
23->74 Rzip chunk data
24->74 Rzip chunk data
75+ Data blocks
-- repeat
(end-MD5_DIGEST_SIZE)->(end) md5 hash
@ -62,7 +62,7 @@ Magic data:
6->14 Source File Size
16->20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size)
21 Flag that md5sum hash is stored at the end of the archive
22 not used
22-23 not used
Rzip chunk data:
0 Data offsets byte width
@ -91,8 +91,8 @@ Byte Content
5 LRZIP Minor Version Number
6-14 Source File Size
16-20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size)
21-22 not used
23-48 Stream 1 header data
21-24 not used
24-48 Stream 1 header data
49-74 Stream 2 header data
Block Data:
@ -118,7 +118,7 @@ Byte Content
6-9 Source File Size (no HAVE_LARGE_FILES)
6-14 Source File Size
16-20 LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size)
21-22 not used
23-36 Stream 1 header data
21-23 not used
24-36 Stream 1 header data
37-50 Stream 2 header data
51 Compressed data type