From: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: Coding system robustness?
Date: Fri, 18 Mar 2005 13:11:43 -0500 [thread overview]
Message-ID: <87wts43jxx.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <x54qf8df09.fsf@lola.goethe.zz> (David Kastrup's message of "Fri, 18 Mar 2005 18:45:42 +0100")
> I'd like to know whether coding systems in general are supposed to be
> robust, meaning that decoding some random byte string into the coding
> system and reencoding it is guaranteed to deliver the same byte string
> again?
AFAIK, (encode-coding-string (decode-coding-string STR 'foo) 'foo)
should always return STR, otherwise it's a bug.
With the introduction of eight-bit-*, this should be true of "all"
coding-systems in Emacs-21, although IIRC some bugs were found in this area
and fixed in Emacs-CVS (maybe for utf-8), but my memory is fuzzy.
Stefan
next prev parent reply other threads:[~2005-03-18 18:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-18 17:45 Coding system robustness? David Kastrup
2005-03-18 18:11 ` Stefan Monnier [this message]
2005-03-18 18:33 ` David Kastrup
2005-03-20 0:22 ` Richard Stallman
2005-03-19 1:08 ` Kenichi Handa
2005-03-19 9:10 ` David Kastrup
2005-03-19 0:52 ` Kenichi Handa
2005-03-19 3:09 ` Richard Stallman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87wts43jxx.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=emacs-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).