GNU bug report logs - #73307
Fix ctype(3) usage

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Message #28 received at 73307 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: luangruo <at> yahoo.com, 73307 <at> debbugs.gnu.org, wiz <at> gatalith.at
Subject: Re: bug#73307: Fix ctype(3) usage
Date: Wed, 18 Sep 2024 08:35:18 -0700

[Message part 1 (text/plain, inline)]

On 2024-09-18 04:45, Eli Zaretskii wrote:
> what's the
> problem with using c_isspace (and what do you mean by "multibyte
> space"

Using c_isspace would be OK, in that it'd handle most practical 
examples. I wrote the fancier version to handle prompts that end in 
non-ASCII spaces, e.g., (yes-or-no-p "Delete all files? ") where the 
last character is actually U+00A0 NO-BREAK_SPACE instead of U+0020 
SPACE, so its UTF-8 encoding is multiple bytes. If it's not important to 
handle such cases we could just use c_isspace.


> You are testing characters for whitespace syntax, which is AFAIU
> subject to buffer-local syntax tables.

Thanks, I didn't think of that. How about the attached patch? It is an 
alternative to just using c_isspace.

[fns.c.diff (text/x-patch, attachment)]

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