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From: "Rod Pemberton" <do_not_have AT nohavenot DOT cmm>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: GNU Emacs 22.3 and Vista
Date: Sun, 12 Apr 2009 03:51:55 -0400
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To: djgpp AT delorie DOT com
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"Rod Pemberton" <do_not_have AT nohavenot DOT cmm> wrote in message
news:grnb7s$33n$1 AT aioe DOT org...
> Maybe... maybe...  another option would be your own package manager.  As
you
> know, tar.gz are tar'd and gzip'd.  tar collects the files into a single
> package and gzip compresses them.  .rpm's are basically cpio.gz with an
> extra header.  That is cpio'd and gzip'd.  Except for the header, cpio
> collects the files into a single package and gzip compresses them.  But,
> you're trying to "dump" gzip, so perhaps you could use tar or cpio with
some
> other compressor...
>
>
> InfoZip, PKZIP and PKUNZIP compatible, and still provides MS-DOS versions:
> http://www.info-zip.org/
>
> John Goltz has Public Domain xzip.c and xunzip.c part of XOS OS sources in
> xossrc.zip.  I'm not sure if these are PKZIP compatible compressors...
> http://www.openxos.org/download.html
>
> Public Domain rpmunpac.c ported to DJGPP is here (needs cpio and gzip
after
> the fact...):
>
http://groups.google.com/group/comp.os.msdos.djgpp/msg/07dac4062df95adc?hl=en
>
> old Public Domain cpio is here:
> http://groups.google.com/group/net.sources/msg/9801455d5523f8cd?hl=en
>
> old Public Domain tar, PDTAR is here in 3 parts.  You might also locate
> these as pdtar.tar.Z or pdtar.arc etc.
>
http://groups.google.com/group/comp.sources.unix/msg/b702702e16afd5e9?hl=en
>
http://groups.google.com/group/comp.sources.unix/msg/f380d5a92c79edb8?hl=en
>
http://groups.google.com/group/comp.sources.unix/msg/43cf62672c39936b?hl=en
>
> Paul Edwards has the Public Domain mvsunzip as part of his Public Domain
> utilities collection.  AFAICT, it extracts files, but I'm not sure what
> format other than probably from IBM.  It's definately missing "inflate"...
> It's probably not worth a link.
>

Continuing on that thread..., you needed a compressor and decompressor.

I've found some links to mainly Public Domain compressors or decompressors
that you could use.  It appears that there are quite a few compressors in
comp.sources.unix, comp.sources.misc, and some in comp.compression.
Although I've been collecting PD C code, my search has been targeted to
other items.  So, I haven't worked through all they have.  From a quick
glance, it appears that a number of common compressors, like Info-ZIP and
ZOO, are available as PD.

It's just a guess Rugxulo, but I'd think using the first two together might
work fairly well.  The first claims it compresses fairly well - almost as
good as GNU zip circa '96.  The second, while intended for loss-less image
compression, might give a few extra percent for executables that have extra
padding and text.  They are both small.  The first four claim Public Domain.

Joseph Allen's variable order huffman compressor
http://groups.google.com/group/comp.compression/msg/18d714d41d02c8e4?hl=en

Walter Dnes xor precompression compressor
http://groups.google.com/group/comp.compression/msg/9afda46c0298d5e8?hl=en

Ross Williams LZRW5
http://groups.google.com/group/comp.compression/msg/7c16a2a39dfa5685?hl=en

D Kane PKWARE tcDecoder
http://groups.google.com/group/comp.compression/msg/aa014556d706c525?hl=en

Mark Adler's "open source" ZIP compatible, 7 parts
http://groups.google.com/group/comp.sources.unix/msg/894416c9eb57fd82?hl=en
http://groups.google.com/group/comp.sources.unix/msg/c8df33170da668e0?hl=en
http://groups.google.com/group/comp.sources.unix/msg/20418b7ef026fa66?hl=en
http://groups.google.com/group/comp.sources.unix/msg/0825748fd58be62a?hl=en
http://groups.google.com/group/comp.sources.unix/msg/2b5bfe3d991d7515?hl=en
http://groups.google.com/group/comp.sources.unix/msg/db133c915085e696?hl=en
http://groups.google.com/group/comp.sources.unix/msg/2eab841fb809d337?hl=en

Also, Info-ZIP's UnZIP v5.12 9/19/94 as 20 parts is avalaible in
comp.sources.misc.

HTH,


Rod Pemberton