From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: emacs-26 8f18d12: Improve documentation of decoding into a unibyte buffer
Date: Tue, 28 May 2019 19:44:15 -0400 [thread overview]
Message-ID: <jwvtvdekv2u.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <83muj6z9s4.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 28 May 2019 21:58:03 +0300")
>> I think this is an error. The patch below seems in order.
>
> I'm not sure. Be sure to read the comments about the tricky business
> of this function, and the method it employs to solve it, and be sure
> you understand all of the subtleties there.
This only applies to the case where `char` is not ASCII.
I installed a slightly more conservative patch which should make sure
the returned string is always unibyte and that also fixes the ebcdic
case at the same occasion.
>> AFAIK it only happens for pure-ASCII strings.
> What is your reasoning?
For one, the docstring says that, pretty much. But also the fact that
`undecided` implies that any coding system should be applicable, IOW
`char` is in the intersection of all the coding systems we have, so it
can only happen if the string is pure ASCII (since one of the coding
systems is `us-ascii`, the insection cannot be larger than that.
That doesn't preclude a non-undefined return value for some pure ASCII
strings, admittedly, tho the docstring suggests that any ASCII string
just returns `undecided`).
Stefan
next prev parent reply other threads:[~2019-05-28 23:44 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190525191039.14136.23307@vcs0.savannah.gnu.org>
[not found] ` <20190525191040.CCD6C207F5@vcs0.savannah.gnu.org>
2019-05-25 19:41 ` [Emacs-diffs] emacs-26 8f18d12: Improve documentation of decoding into a unibyte buffer Stefan Monnier
2019-05-25 19:59 ` Eli Zaretskii
2019-05-25 20:15 ` Eli Zaretskii
2019-05-25 21:11 ` Stefan Monnier
2019-05-25 21:27 ` Stefan Monnier
2019-05-26 2:37 ` Eli Zaretskii
2019-05-27 9:47 ` Robert Pluim
2019-05-27 12:24 ` Stefan Monnier
2019-05-27 13:02 ` Robert Pluim
2019-05-27 13:32 ` Stefan Monnier
2019-05-27 13:49 ` Robert Pluim
2019-05-27 16:53 ` Eli Zaretskii
2019-05-28 6:23 ` Robert Pluim
2019-05-28 14:57 ` Eli Zaretskii
2019-05-28 3:08 ` Stefan Monnier
2019-05-28 4:40 ` Eli Zaretskii
2019-05-28 11:55 ` Stefan Monnier
2019-05-28 15:18 ` Eli Zaretskii
2019-05-28 17:43 ` Stefan Monnier
2019-05-28 18:58 ` Eli Zaretskii
2019-05-28 19:35 ` Eli Zaretskii
2019-05-28 23:44 ` Stefan Monnier [this message]
2019-05-29 14:33 ` Eli Zaretskii
2019-05-27 16:51 ` Eli Zaretskii
2019-05-27 19:17 ` Stefan Monnier
2019-05-28 2:30 ` Eli Zaretskii
2019-05-28 2:56 ` Stefan Monnier
2019-05-28 4:17 ` Eli Zaretskii
2019-05-28 6:21 ` Robert Pluim
2019-05-28 11:53 ` Stefan Monnier
2019-05-28 11:54 ` Stefan Monnier
2019-05-28 15:11 ` Eli Zaretskii
2019-05-28 17:25 ` Stefan Monnier
2019-05-28 18:51 ` Eli Zaretskii
2019-05-28 23:39 ` Stefan Monnier
2019-05-29 2:45 ` Eli Zaretskii
2019-05-29 16:28 ` Stefan Monnier
2019-05-29 18:19 ` Eli Zaretskii
2019-05-29 18:58 ` Stefan Monnier
2019-05-29 19:09 ` Eli Zaretskii
2019-05-29 19:50 ` Stefan Monnier
2019-05-27 16:43 ` Eli Zaretskii
2019-05-27 16:42 ` Eli Zaretskii
2019-05-27 19:13 ` Stefan Monnier
2019-05-27 16:40 ` Eli Zaretskii
2019-05-27 20:17 ` Richard Stallman
2019-05-28 2:36 ` Eli Zaretskii
2019-05-28 7:06 ` Robert Pluim
2019-05-28 14:59 ` Eli Zaretskii
2019-05-28 15:11 ` Robert Pluim
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