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- Path: sparky!uunet!elroy.jpl.nasa.gov!usc!randvax!edhall
- From: edhall@rand.org (Ed Hall)
- Newsgroups: comp.compression
- Subject: Re: random access with .Z files
- Message-ID: <3734@randvax.rand.org>
- Date: 21 Aug 92 21:40:59 GMT
- References: <ROBERT.92Aug18172331@n051.saskg.semicon.sony.co.jp> <93_n36j.kemnitz@netcom.com>
- Sender: news@randvax.rand.org
- Distribution: comp
- Organization: RAND Corporation.
- Lines: 16
- Nntp-Posting-Host: ives.rand.org
-
- In article <93_n36j.kemnitz@netcom.com> kemnitz@netcom.com (Greg Kemnitz) writes:
- >In article <ROBERT.92Aug18172331@n051.saskg.semicon.sony.co.jp> robert@n051.saskg.semicon.sony.co.jp (Robert Veltman) writes:
- >=
- >=Is it possible to read a compressed file (LZW I think in the case of
- >=UNIX compress) and extract the dictionary information in order to be
- >=able to do random fseeks in the compressed file and decode from that
- >=point on?
- >
- >zcat something.Z | do anything you want here
-
- You've GOT to be kidding! You can't seek on a pipe. Even if you could,
- you've effectively uncompressed the entire file before performing your
- first random access. This would defeat the purpose of the original request.
-
- -Ed Hall
- edhall@rand.org
-