From: "Stephen J. Turnbull" <stephen@xemacs.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-pretest-bug@gnu.org, christopher.ian.moore@gmail.com
Subject: Re: jka-compr.el doesn't recognise gzipped files from their magic bytes
Date: Wed, 19 Sep 2007 12:55:50 +0900 [thread overview]
Message-ID: <877imnia0p.fsf@uwakimon.sk.tsukuba.ac.jp> (raw)
In-Reply-To: <ups0f22i3.fsf@gnu.org>
Eli Zaretskii writes:
> > From: "Stephen J. Turnbull" <stephen@xemacs.org>
> > Cc: christopher.ian.moore@gmail.com,
> > emacs-pretest-bug@gnu.org
> > Date: Tue, 18 Sep 2007 14:49:17 +0900
> >
> > Furthermore, there must be some scheme for buffering for process
> > coding systems.
>
> I'm not sure what buffering you had in mind. AFAIK, Emacs reads into
> a buffer whatever portion output of a process is available in the
> OS-maintained pipe, decodes that portion, and passes the decoded text
> to the filter or sentinel function.
Decodes with what? is the question. If the process output coding
system is nil, Emacs must "guess" what it is. This requires reading
all of the input and collecting some "statistics about it", then
making a decision about which coding system to use, and finally it
*goes back to the beginning* and decodes according to that coding
system. Which is exactly the situation we are describing here.
There may be no buffer there that Emacs can access under normal
circumstances, however, there is some mechanism that can be used by
coding systems. For example, CCL could be used.
next prev parent reply other threads:[~2007-09-19 3:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-17 19:28 jka-compr.el doesn't recognise gzipped files from their magic bytes Chris Moore
2007-09-17 20:29 ` Eli Zaretskii
2007-09-18 3:35 ` Stephen J. Turnbull
2007-09-18 4:14 ` Eli Zaretskii
2007-09-18 5:49 ` Stephen J. Turnbull
2007-09-18 19:32 ` Eli Zaretskii
2007-09-19 3:55 ` Stephen J. Turnbull [this message]
2007-09-19 18:43 ` Eli Zaretskii
2007-09-20 18:53 ` Stephen J. Turnbull
2007-09-20 19:06 ` Stefan Monnier
2007-09-20 23:24 ` Stephen J. Turnbull
2007-09-21 3:35 ` Stefan Monnier
2007-09-21 5:00 ` Stephen J. Turnbull
2007-09-21 5:10 ` Kenichi Handa
2007-09-21 6:21 ` Stephen J. Turnbull
2007-09-21 7:41 ` Kenichi Handa
2007-09-17 21:50 ` Stefan Monnier
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