Re: Re: [Zip-Bugs] UnZip 5.51c Beta available

> > UnZip, version 5.51c BETA, 13 May 2003
>
> [...]
>
> One thing to note:  the US LZW patent (Unisys flavor, anyway) expires
> next month.  I believe the European and Japanese copies are still valid
> for an additional year beyond that, and there's always the remote possi-
> bility that IBM might try to assert their flavor, despite its invalidity.
> But it's something to keep in mind, anyway.  (I'd probably vote to keep
> the status quo, since nobody much seems to care about unshrinking
anymore.)
>
I would also like to keep the current status for now.
But, Greg, do you remember: There was a bug report some time ago
concerning the unshrink code that failed to decompress a valid shrunk archiv
entry.
This shrunk compressed entry can be extracted without problems when using PK
tools, so there is a problem with our unshrink code. When this problem was
submitted to Zip-Bugs, you said you might take a look into the decompression
code when the patent situation "expires".
I had tried to understand why the unshrink process failed, but I was not
familiar with LZW algorithm details and did not find any obvious bug.

> Greg

Cheers,

Christian Spieler