home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The PC-SIG Library 10
/
The PC-Sig Library - Shareware for the IBM PC and Compatibles (PC-SIG)(Tenth Edition Disks 1-2804)(1991).iso
/
PC_SIGCD
/
20
/
1
/
DISK2018.ZIP
/
LHARC
/
LHARC.MAN
< prev
Wrap
Text File
|
1989-05-27
|
32KB
|
919 lines
User's Manual for High-Performance File-Compression Program
LHarc Version 1.12B
04/29/89
Copyright (c) Haruyasu Yoshizaki (Yoshi), 1988-89
Nifty Serve PFF00253
ASCII PCS pcs02846
------------------------------------------------------------------------
0. It Came to Pass One Day...
After reading "A Hard Disk Cookbook" from Shouei Press, I had a
strong desire to write my own archiving utility. On the Nifty Serve
network, I was first exposed to Mr. Miki's Larc, which surpassed the
well-known PKware in compression ratios, as reported in the Forum
Software Debut and Review. The next shock came when I saw Mr.
Okumura's LZari, which has even better compaction-ratio performance.
I started to rewrite LZari for in assembly level language, trying to
make it run faster, but I could find no way of speeding up the
process of de-archiving.
So, as an alternative, I used adaptive Huffman coding with an LZSS
encoder in order to achieve a similar rate of compression with a
faster decompression process. This is the idea used in LHarc.
No one can be sure of eradicating all possible bugs, yet if SPACE is
more valuable than TIME to you, please give this program a try. It
may be slower in execution, but it achieves the tightest compression
ratios of any general archiver in the present environment (copyright
reserved).
1. How to Use It:
Just type "LHarc" to see the help screen.
Command-line synopsis:
======================
LHarc [command] [/<switches>[-|+|2|<option>]] <archive_name>
[<path_name>] [<home_directory_name>\ | <drive_name>:]
You may place switch(es) at any place following the
command. A group of switches can be specified together.
Terminology:
============
A path name comprises a directory name and a file name:
a:\tc\include\stdio.ext
|<---- Path_name ---->|
|<Directory_>||<File_>|
|<-- name -->||<name >|
Commands:
=========
a (Add)
LHarc a Archive.LZH file1.ext
Adds 'file1.ext' to 'Archive.LZH'. If 'Archive.LZH' does
not exist, then LHarc creates it. If a file with the name
'file1.ext' already exists in the archive, then LHarc will
replace it with the specified file.
u (Update)
LHarc u Archive.LZH file1.ext
Adds 'file1.ext' to 'Archive.LZH', the same as with the 'a'
command. However, if 'file1.ext' already exists in the
archive, LHarc will check its time stamp, and will keep the
newer one and ignore the older one. (The /c switch forces
LHarc to skip this time-stamp comparison.)
m (Move)
LHarc m Archive.LZH file1.ext
is equivalent to
LHarc u Archive.LZH file1.ext
DEL file1.ext
Beware the fact that the second line is always active. You
might lose the file 'file1.ext' for eternity.
f (Freshen)
LHarc f Archive.LZH file1.ext
Replaces 'file1.ext' in 'Archive.LZH' with the newer one
only if a file with this name already exists in the archive.
Otherwise, no action is taken. (The /c switch forces LHarc
to skip this time-stamp comparison.)
e (Extract) or x (eXtract)
LHarc e Archive.LZH
Extracts all the files from 'Archive.LZH' to the specified
drive or directory. If the specified directory does not
exist, then LHarc will prompt you whether to create it.
LHarc e Archive.LZH file1.ext
Extracts only 'file1.ext' from 'Archive.LZH'. If a file with
the name 'file1.ext' exists in the home directory, then LHarc
will refrain from extraction if the existing file has the
same time stamp or is newer. (The /c switch forces LHarc to
skip this time-stamp comparison.)
LHarc e Archive.LZS file.ext
Extracts 'file.ext' from an .LZS file archived with Larc
3.xx.
NOTE: Larc is another popular archiver on Japanese PDS's.
p (disPlay)
LHarc p Archive.LZH file1.ext
Extracts 'file1.ext' from 'Archive.LZH' and redirects it to
standard output.
LHarc p /v Archive.LZH file1.ext
Invokes the default utility LESS to format and display the
redirected output. LHarc creates a temporary file
'LHARC.TMP' for review that will be deleted later.
LHarc p /vsee Archive.LZH file1.ext
Invokes the text formatter SEE, which then displays
'file1.ext' to standard output in a paged format. Refer to
PC-LESS.ARC, LIST64A.ARC, and SEE15.ARC. (These should be
available in most BBS libraries.)
d (Delete)
LHarc d Archive.LZH file1.ext
Deletes 'file1.ext' from 'Archive.LZH'.
l (List)
LHarc l Archive.LZH
Lists information about all the files in 'Archive.LZH'.
Each file takes one line of output. A '+' before the file
name indicates that a directory na e is stored with the file
name. (The /x switch forces LHarc to display extended file
names.)
If you specify file names and extensions, then only the
files with matching names or extensions will be listed:
LHarc l Archive.LZH *.c *.h readme.DOC
Lists information on all the .C, .H, and README.DOC files
in 'Archive.LZH'.
v (View)
LHarc v Archive.LZH
Which is equivalent to:
LHarc l /x Archive.LZH
Lists information about all the files in 'Archive.LZH',
except that each listing takes two lines: the first for the
full path name, and the second for the rest of the
information. (The /x switch forces LHarc to display
extended file names.)
s (Self-extract)
LHarc s [/x] [k<KEY>] Archive.LZH
Creates a self-extracting file 'Archive.COM' (or
'Archive.EXE' if larger than 64K) from 'Archive.LZH' on the
specified drive or directory.
NOTE: There are now two versions of self-extracting
models. The switch /x after s command specifies
large SFX to be made. This always makes a file
Archive.EXE. AUTOEXEC.BAT file can run on this
/x switch if key word KEY is properly typed.
You may self-extract a file of size more than
1 Mb in this mode. Without the /x switch, you
have 'Archive.COM' or 'Archive.EXE' according to
the reduced size. To have self-extracting file,
it is as large as the 640K DOS free-memory area.
Please check normally, to see whether your self-
extracting file exceeds 400K in size. If more,
use the /x switch then.
(no command specified)
LHarc Archive.LZH
Acts exactly the same as the 'l' command. This optional
action is temporary. Don't count on it in future versions.
LHarc t Archive.LZH
Will check integrity of the archived file Archive.LZH by
CRC check. This is new in this version 1.12.
Switches:
=========
Specify switch(es) following the switch character '/'. If you want
to specify more than one switch, type characters continuously
without any intervening spaces, like "/rxwe:\work" or "/cxvless".
When the 'v' and 'w' switches are used with other switches, they must
be specified at the end of a sequence, as shown in the above
examples.
You may place a '+' or '-' sign after switches, with the following
meanings: '+' turns the switch on, and '-' turns the switch off.
The '2' creates a special option for the /r and /v switches (see
below). If you just specify /<switch> without '+' or '-', then
<switch> will be toggled from 'on' to 'off' or vice versa.
NOTE: Use only lowercase letters for switches. Capital letters
are reserved for future use.
/x[-|+] (eXtend file names)
Extends file names with directory names. This switch
determines whether to store only the file name or the full
path name.
Suppose you are in the root directory, \, and you have two
files '\tc\include\sys\stat.h' and '\stat.h':
LHarc a Archive.LZH stat.h
Adds only the file 'stat.h' from the current (root)
directory to 'Archive.LZH', but
LHarc a Archive.LZH stat.h \tc\include\sys\stat.h
Will fail with the message "Same name in another path"
because extended directory names are not specified.
However,
LHarc a /x Archive.LZH stat.h \tc\include\sys\stat.h
Adds both files to 'Archive.LZH'. Then:
LHarc e Archive.LZH stat.h
Extracts only one 'stat.h' file, to the root directory,
whereas:
LHarc e /x Archive.LZH stat.h
Extracts two 'stat.h' files: one to the root directory, and
the other to the directory \tc\include\sys\.
Use of the /r switch allows storage of all files with the same name
by recursively searching directories. Thus,
LHarc a /r Archive.LZH stat.h
Adds two 'stat.h' files, with path names, to 'Archive.LZH':
one from the root directory, and the other from the
directory \tc\include\sys\.
The /r switch always sets the /x switch simultaneously. If
you don't want full path names, include /x- after specifying
the /r switch.
/p[-|+] (distinguish Path names)
Distinguishes between file names extended by directory
names. Suppose your archive 'tc.lzh' contains both 'stat.h'
and '\sys\stat.h'. Then:
LHarc e tc stat.h
Extracts both 'stat.h' files, and the older one will be
over-written by the newer one. Furthermore,
LHarc e /p tc stat.h
Extracts only 'stat.h', and
LHarc e tc sys\stat.h
Extracts only '\sys\stat.h'.
/c[-|+] (skip time-stamp Comparison)
LHarc [efux] /c Archive.LZH [file1.ext file2.ext ...]
If a file with the same name is to be created, the default
action of LHarc is to compare the time stamp of each pair of
files, and some will be overwritten and some just ignored.
This switch forces LHarc to overwrite any existing files
with extracted ones of the same name.
/m[-|+] (no Message)
LHarc [<command>] /m Archive.LZH [file1.ext file2.ext ...]
By default, LHarc will ask questions like "Overwrite [Y/
N]?". This switch suppresses these prompts, and LHarc will
continue as if "y" is typed in.
/a[-|+] (any Attribute)
LHarc a /a Archive.LZH file1.arc
Adds 'file1.arc' to 'Archive.LZH'.
Normally, LHarc will not archive files with hidden,
read-only, or system attributes. The /a switch forces LHarc
also to archive files with these attributes.
/r[-|+|2] (Recursively)
There are three modes of collecting files to be archived:
(a) specified file(s): /r-
Adds files with specified file names only (default mode).
(b) across directories: /r or /r+
LHarc a /r Archive.LZH *.C
Adds to 'Archive.LZH' all the files with
extension '.C' - this switch forces LHarc to
disregard directory names and add all files
with the specified file name(s) in the working
directory and its branches. All file names
will be extended by directory names. This
switch is used to archive all versions or all
files of a similar type.
(c) specified directory: /r2
LHarc a /r2 Archive.LZH \DOC
Adds to 'Archive.LZH' all the files in the
directory specified by the path \DOC, similar
to the Unix -r option. This switch is used to
archive a complete directory (other than the
root).
The /r and /r2 switches will invoke the /x switch
simultaneously. You may have to toggle the /x switch off
(with /x-) after using /r or /r2. The /x- switch forces
LHarc to disregard stored directory names.
/w[-|+|<directory name>] (set Working directory)
LHarc a /w[d:\TMP] Archive.LZH [file1.ext file2.ext ...]
Creates all temporary files in the directory \TMP on drive
D: - if no directory name is specified, the current directory
becomes the working directory. All the temporary files
created in the process of archiving will reside in that
directory and be deleted later. This switch overrides
setting the working directory with an environment variable
(see below).
The /w switch is used when
(1) you have no room in the directory where the archive is,
or
(2) you want your work done silently and swiftly on a RAM
disk.
/v[-|+|2|<redirection utility name>] (View by page)
LHarc p /v Archive.LZH file1.ext
Extracts 'file1.ext' from 'Archive.LZH' and invokes the
default utility LESS for formatted display to standard
output.
NOTE: LESS.COM is an utility similar to MORE.COM of
MS-DOS and something more, but less than the
"less" of American Unix networks. PC-LESS.ARC or
LIST64A.ARC (available from many BBS sources in
the U.S.A.) works as well as the Japanese
utility.
LHarc p /v2 [/v<utility name>] Archive.LZH file1.ext
Invokes the specified utility for formatted display to
standard output, but suppresses the output of path names or
file names. This switch is provided for viewing binary files
with a dump utility.
LHarc first creates an un-archived file LHARC.TMP and then invokes
the specified utility, usually a page formatter like SEE.EXE or
LIST.EXE. Temporary files will normally be deleted after you have
viewed the output.
LHarc /n Archive.LZH
No indicator. LHarc now uses ANSI escape sequence to report
the progress of archiving. For IBM-PC users, the display will
end in somewhat ugry expression. This switch will suppress
the escape code.
LHarc s /x /k<KEY> Archive.LZH
The switch /k encodes key word <KEY>, or any word, for
auto-executable file Archive.EXE run. For detail, see
section 3.
Archive name (path name):
=========================
All files archived by LHarc have the same format as those archived
by Larc, except that Larc uses the extension .LZS. When you specify
a different extension for the archive name, LHarc will prompt you
with:
"Extension of archive is not '.LZH.' Continue processing? [Y/N]"
Wildcards are valid with the 'e', 'x', 'p', 'l', 'v', and 's' commands:
LHarc e *.LZH *.c
Extracts all files with extension .C from all archives in
the current directory.
Home directory name (drive name):
=================================
If you specify a home directory name, then everything will happen in
that directory as though it were the current directory. Specify a
home directory name ending with either '\' or ':'. All the files
will be archived without storing this directory name unless you use
the /x switch.
Example: In the following directory tree:
|-- BIN --
|
|-- \ --|-- TC --|-- LIB --
|
|-- INCLUDE --|-- SYS --|-- STAT.H
From your root directory, \, typing
LHarc a /r Archive.LZH stat.h tc\include\
Will add '\tc\include\sys\stat.h' to 'Archive.LZH' with the
path name "\SYS\STAT.H" from your home directory \tc\
include\.
File name (path name):
======================
File or path names of files to be archived must be specified, or
else LHarc will automatically assume *.* with no directory names.
The wildcards '*' and '?' behave exactly as in DOS. You cannot use
them to specify directories except with the /r2 switch, similar to
the Unix -r option for cp, mv, and rm.
Switch character:
=================
If you are using some other character, like '-', in place of the
forward slant '/' as a switch delimiter (from DOS Function 37H, Set
Vector), you have to use your delimiter, say '-', in place of '/',
like "-cx". You may then use '/' for a directory delimiter, similar
to Unix convention. (You can use '-' as a switch character with
LHarc anyway.)
The above comment may not apply unless you are running MS-DOS 3.xx.
2. Setting Switches in an Environment Variable
You may set any of LHarc's default switches with the environment
variable 'LHARC':
SET LHARC=/we: /r2
Will set drive E: as the working directory and archive all
files in directory mode.
You may also specify LHarc's working directory with the environment
variable 'TMP':
SET TMP=E:
but the /w switch will override this setting.
3. Self-Extracting Files
Now we have revised this part of the problem extensively. As you
have seen in the first screen of this software, a totally new text
file is introduced for all self-extracting files made by LHarc.
This is controlled by naming such a file with the single character
'!' to prompt LHarc to display this special file. Edit an ASCII file
and then rename to just '!'. On typing file name of compressed .EXE
or.COM file, LHarc looks for this text file first of all and displays
it on the screen with a [Y/N] prompt to let you read it all. Namely,
it is an auto-executable file for the display only, no harm, no
danger. Not to worry.
You may send E-mail archived by Lharc, say the first page separated
with name '!'. Then this part of your mail, when de-archived, will
appear on the screen with Continue [Y/N]? Isn't it appealing? I call
this new feature by the name telop. You may archive files with telop
'!' included. You don't see telop from outside, yet you just see the
telop and type to know what are there by seeing telop screen. You can
archive files with short description, which is visible without really
de-archiving.
Moreover, there are two models for the SFX, self extractor,
available for your convenience and for the safety from trojans.
1. Small SFX: This model supports files of small enough to work
within the available memory size. You can't make a self-
extracting of size more than 640 Kilobytes theoretically.
You will likely not wish to use this size if over 400k from
a practical standpoint. A few people may even have trouble
supplying 400k remaining memory. If any question use large
SFX now explained.
2. Large SFX. You can make self-extracting size of up to 1
Megabytes. Beside you can incorporate self-executable
AUTOLARC.BAT file to make programs run automatically. I
have provided a 'key word' system for the auto-run. You have
to know the 'key word' to let it run for the first trial.
After then the self-extracting auto-run program learns to
work without the 'key word'.
To make a small SFX:
--------------------
LHarc s Archive.LZH
Makes a self-extract file Archive.COM or Archive.EXE
accoring to the size of the file. If a telop file ! is
included, you will see the telop display first and then you
may type [Y/N] to have files un-archived or just let it be.
To record telop file ! on your disk, type:
LHarc e Archive.COM>!
or, if an .EXE file:
LHarc e Archive.EXE>!
To make a large SFX:
--------------------
LHarc s /x Archive.LZH
or for auto-run, self-extract file add the /k switch and
key word:
LHarc s /x /kKEY Archive.LZH
---
Usingh the /x switch specifies the large SFX is to be made.
KEY stands for a key word, only used if Archive.LZH contains
an AUTOLARC.BAT file, which you make. You will always have
an .EXE file with the /x switch so in the above case, it will
create Archive.EXE. You may include a '!' text file as this
is always available.
Archive [/ed:] [/x]
for an auto-run file having an AUTOLARC.BAT file:
Archive KEY
or
Archive key [/ed:] [/x]
NOTE: The key word need not be secret at all. If a
public word, and some concern is present, just
type:
Archive
without key word and the contents will then be
extracted for inspection without auto-run.
This makes the LHarc auto-run very versatile
and still minimizes problems with Trojan horse.
To un-archive you have to type key word to run AUTOLARC.BAT.
Without this key word, the file just extracts itself without
prompt. If it learns the key word once, then it will run
automatically at anytime on any directory, WITHOUT adding
the key word. This may be hazardous. The key word is not
case-sensitive. KEY and key both can make it run. The upper
limit of the reduced size for self-extracting is at least
1MB. Try it on your own system.
Thew optional /e switch specifies the directory [d:]on which
archived files to be expanded. If Archive.LZH has files with
path_names, then files reproduced with these path_names on
respective sub-directories. If such sub-directories do not
exist, Archive[.EXE] file will automatically create them.
This /e switch is new in this version. The AUTOLARC.BAT file
is reproduced on your curent directory, with or without this
/e switch.
The attribute of of all the archived files is always 20H. If
you want them to be read only, you can do it by AUTOLARC.BAT
with a line something like:
chmod -w file?.*
If Archive.LZH contains file1.EXE file1.DOC file2.EXE
file2.DOS...[etc.]
4. Archive File Header
LHarc's header is compatible with that of Larc. Methods of
archiving are two:
-lh0- stored as it was, and
-lh1- compressed by LZHuf coding.
LHarc can extract files stored in Larc-created archives (with the
extension .LZS) if they are type 4 or 5.
NOTE: Larc is another Japanese archiver, with source code published
in a Journal. It is now available in the United States, also.
5. Result Codes
LHarc returns the following result codes to the parent process:
0 Normally finished.
1 Process finished with nonexistent file names ignored
during archiving, or CRC error occurred during
un-archiving.
2 Process terminated by fatal error; no archives created or
files moved.
3 Unable to write the temporary files into the archive. Work
file renamed as 'LHARC.)2(', original archive deleted. Try
renaming LHARC.)2( as your archive, although it could be
damaged.
6. Temporary Files
LHARC.)1( Original archive, renamed.
LHARC.)2( Work file used to create new archive.
LHARC.TMP Work file created for review by some page
formatter.
If a file with any of these names already exists, then the behavior
of LHarc is unpredictable.
7. My Distribution Policy
Under the following conditions, you may freely copy and distribute
this software:
1. Under all circumstances, "Copyright by Haruyasu Yoshizaki"
must be attached to the copy.
2. This manual or its hardcopy should go together with the
software.
3. You may modify the program, but in that case, you must
distribute the complete source code for the program,
including your specific contributions, and you must make it
clear that you have made such modifications.
4. You must try to distribute the latest version available.
5. I assume no warranty for any claim of damage you may sustain
by using this software.
6. I have no obligation to revise the program to correct any
fault in this software.
7. For the commercial use of this software, I add the following:
a. The entire software made incorporating this program
should not be copy protected in the sense that the
DISKCOPY program of MS-DOS makes an imperfect copy.
b. Every part of the package should print the name
"LHarc" and the copyright banner.
c. The distribution policy of this software should be
printed either in the manual, in the package, or on
the disk label.
8. Acknowledgments
Special gratitude to H. Okumura, who uploaded the code for LZari in
PC-VAN on which this LZHuf coding is based and to K. Miki, who re-
posted LZARI on Nifty Serve and who is the author of Larc I. For all
those who contributed reviews, comments, and bug reports, I thank you
very much.
I also appreciate the work and personal cost (both in his time and
financial cost to telephone the United States) that Prof. Kenjirou
Okubo has contributed to make this available to interested users in
the United States.
The .EXE file for LHarc is nearly 2K smaller owing to use of pcs27162
by S. Takanami. I honor this utility and thank him for letting me
use it to prepare LHarc.
I have made so many revisions to LHarc, yet I do not think I can
ever expel all the bugs dwelling inside. I would appreciate your
comments and bug reports. Please route them to me via the SDR Forum
of Nifty Serve or salon.pds of ASCII Net.
9. References
1) Labo, A.P., A Hard Disk Cookbook: Shouei Press (1987).
2) Kurita, T., Huffman coding, bit: Jewelry Box of Computing 43,
vol. 20, no. 7, pp. 100-101 (1988).
3) Miki, K., Documentation for Larc: LARC.MAN
10. History of Revisions
Ver. 1.12b
1. Fixed AUTOLARC.BAT bug for auto-run after auto-extract.
Ver. 1.12
1. 't' command to test integrity of archived file.
2. Change of Screen display due to new commands and switches.
3. Bug fixed for CRC error check with archived file of size zero.
4. New telop file '!' with Large and Small SFX.
Ver. 1.01
1. Minor touchups to help screen and program messages.
2. Editorial polishing of User's Manual for clarity and readability.
Ver. 1.00
1. Mode without work file added.
2. /r switch forces /x switch on simultaneously.
Ver. 0.07c
1. Removed bug in detecting memory shortage.
2. Compacted self-extracting program.
Ver. 0.07a
1. Ver. 0.05-0.07 break down Heap areas. Corrected.
2. Accepts any directory name with any attributes.
Ver. 0.07
1. Prohibited actions to a write-protected archive.
2. 'm' command now removes files made by older versions.
3. Error-handling routine revised in dealing with wildcards for
archive names.
4. No command specified is now interpreted as 'l' command specified.
5. Error level 1 returned when CRC checking detects an error during
un-archiving.
6. Program now halts when self-extraction process meets an error.
7. Bug fixed in CRC checking when a directory name is met in un-
archiving process.
Ver. 0.06b
1. Removed possibility of a damaged cluster appearing in failing to
re-create (= freshen) an archived file.
2. Removed '+' bug in redirecting output with 'p' command.
Ver. 0.06
1. If a file transaction fails with 'u', 'm', or 'f' command, LHarc
will leave the archive as it was.
2. File attributes were sometimes misunderstood by 'f' command. This
possibility eliminated.
Ver. 0.05
1. CRC checks extended to self-extracting files.
2. Completely recursive modes made possible for 'a,u,m' commands.
3. Meets requirements of APPEND.EXE of MS-DOS version 3.3.
4. '\' no longer needed at end of working-directory name with /w
switch.
Ver. 0.04
1. Support for environment variable 'TMP'.
2. "LHarc p /v a.lzh a_file" used to delete 'a_file' in case of an
error. Bug fixed.
3. Added check for a file with the same name in making a self-
extracting file.
4. In a self-extracting archive, if a file with the same name of
larger size existed, then LHarc kept the difference when it was
overwritten by one of smaller size. This bug removed.
Ver. 0.03
1. Environment variable 'LHARC' sets some of the switches.
2. Made it possible to specify '+', '-' by switches.
3. /v switch included.
4. Wildcards can now be used for archive names with 'e,x,p,l,v,s'
commands.
5. Home directory names had some interactions with Kanji-code. Fixed.
6. Fixed header-file bugs of self-extracting .EXE files.
Ver. 0.02
1. Support of 'm' command.
2. Larc 3.xx compatibility. Type 4, 5 .LZS files are un-archived.
3. Accepts systems with different switch characters.
4. Minor bugs fixed with 'e' command.
5. Revised format for 'l' command.
Ver. 0.01
1. Support of self-extracting files.
2. 'p' command added.
3. /c switch applies for more combinations of commands and switches.
4. Error handling revised.
5. Bug fixed in 'l' command.
6. New algorithm introduced in sorting path names.
11. Comments
a. Some other algorithms I have in mind
For some specific files, the compression ratios are not as good as
with PKware's PKZIP. For such files, I may use LZSS compression with
correlated arithmetic compression. This is an effective method, and
my experiments show that the ratios are no less than PKware's. Yet
it takes too much time in both the archiving and de-archiving
processes, with much higher memory consumption. Consequently, I
intend to keep working on this LZHuf algorithm.
Naturally, I am ready to accept any comments, and I continue to
experiment.
b. Naming of LHarc
Some people have expressed concern over the fact that the string
"arc" is contained in the name "LHarc." I make the following
statements just for them.
The crucial points in SEA's suit against PKware were the way in
which PKware advertised and sold PK(x)arc with an emphasis on its
ARC compatibility, and the loss of profits from shareware
contributions.
This is not the case with LHarc. I have used a different archiving
method and made it a freeware program with a format incompatible
with ARC. Therefore, I hope I will not be bothered by similar
accusations.
- end -
----------------end-of-author's-documentation---------------