w8sdz@WSMR-SIMTEL20.ARMY.MIL (Keith Petersen) (04/06/89)
I don't usually repeat Usenet postings here but this is a significant
program source posting. It is the compression code for the Japanese
LHarc program which has compression better than ZIP.
The file is in pd1:<msdos.arc-lbr>lzhsrc10.arc on Simtel20.
--Keith
--forwarded message--
From: c31293%tansei.cc.u-tokyo.ac.jp@RELAY.CS.NET (Kenji Rikitake)
Newsgroups: comp.binaries.ibm.pc
Subject: v02i042: C source for lharc's LZHuff compression algorithm
Date: 6 Apr 89 01:00:33 GMT
Summary: lzhsrc10.arc, C source for lharc's LZHuff compression algorithm
Approved: dhesi@bsu-cs.bsu.edu
Checksum: 4042323451 (Verify with "brik -cv")
Posting-number: Volume 02, Issue 042
Originally-from: Haruhiko Okumura, Haruyasu Yoshizaki, & Kenji Rikitake
Submitted-by: Kenji Rikitake <c31293%tansei.cc.u-tokyo.ac.jp@RELAY.CS.NET>
Archive-name: lharc/lzhsrc10.uue
[ US users should note that the cost of international email is usually
borne by the non-US recipient or sender. -- R.D. ]
Following is a source code of single-file compression/uncompresssion
program. It has the same compression algorithm with LHarc. I have got
a permission to post this to the USENET community from Haruyasu
Yoshizaki.
-- Kenji
[
From the source:
* LZHUF.C English version 1.0
* Based on Japanese version 29-NOV-1988
* LZSS coded by Haruhiko OKUMURA
* Adaptive Huffman Coding coded by Haruyasu YOSHIZAKI
* Edited and translated to English by Kenji RIKITAKE
The source is fairly generic but has a few ANSI-specific features such
as memmove() and function prototypes.
It compiles with Turbo C 1.0. The resulting program is quite fast,
considering it is written purely in C. It seems to compress exactly as
well as lharc itself. I did not try to compile it on any other
system.
This would have been the perfect text posting except that there are
some control characters in the source, so I archived it.
-- R.D.
]