One last idea - what does the data actually look like? If you examine the files and find that the first n bytes are the same in each one, it may be possible to simply strip off that n bytes and pass the rest to 'decompress'...

Best,

Mark

ps. I suppose it might be an idea to ask about the format of 'TCompressedstreams' (or whatever it was) in a Delphi forum.

On 29 Dec 2008, at 23:50, Ken Ray wrote:

Can you compress a copy of the original file with Rev, and compare it
to the zlib compressed copy? Does the data look totally different, or
maybe just off by a few bytes / headers?

Unfortunately, I don't have the original file... the files I'm receiving are from another program on Windows that only decompresses the data in memory; the files on disk are always in a compressed state, so the files I can look
at are always compressed.

If you have a MacOS X machine (or Linux) handy, you can use gzip and
gunzip as command-line equivalents of compress() and decompress() and
see how those results compare as well...

Yeah, I've tried that already and keep getting errors that the data is "not
compressed".

:-(

Ken Ray
Sons of Thunder Software, Inc.
Email: k...@sonsothunder.com
Web Site: http://www.sonsothunder.com/


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