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1995-03-09
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SHRI
======
xpkSHRI.library
Version 1.0 (25 Aug 1993)
Copyright 1993 by Matthias Meixner
License/Disclaimer
------------------
This library may be freely distributed with the XPK compression
package, as long as it is kept in its original, complete, and unmodified
form. It may not be distributed by itself or in a commercial package of
any kind without my written permission.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
Description
-----------
SHRI is an XPK packer sublibrary which implements a highly for
compression rate optimized compressor, that uses offset/len encoding with
adaptive arithmetic aftercoding for best compression results. Its
compression rate is better than that of most other packers, e.g. lha,
zoo or powerpacker.
It supports 7 modes, which differ in the size of the dictionary:
Modes Dictionarysize
------ --------------
0- 14 1k
15- 28 2k
29- 42 4k
43- 56 8k
57- 70 16k
71- 84 32k
85-100 64k
A larger dictionarysize gives a higher compression rate but slows down the
compression.
History
-------
V0.2 First public Release
V0.3 XpksPackChunk retured XPKERR_CORRUPT instead of XPKERR_EXPANSION
- Bug fixed in V0.3
V0.4 SHRI could not decompress files, which where partly compressable
- Bug fixed in V0.4
V1.0 New Version with improved compression- and decompressionspeed
Contact Address
---------------
Matthias Meixner
Sandberg 13
36145 Schwarzbach
Germany
meixner@rbg.informatik.th-darmstadt.de