From: Gregory Heytings via "Emacs development discussions." <emacs-devel@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Dmitry Gutov <dgutov@yandex.ru>,
stephen.berman@gmx.net, emacs-devel@gnu.org
Subject: Re: dired-do-find-regexp failure with latin-1 encoding
Date: Sun, 29 Nov 2020 19:49:14 +0000 [thread overview]
Message-ID: <alpine.NEB.2.22.394.2011292038030453.27861@sdf.lonestar.org> (raw)
In-Reply-To: <83eekckndb.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 1209 bytes --]
>>> Then I think injecting LC_ALL=C into the environment when running Grep
>>> in this case makes the results more useful? And we can then avoid
>>> using -a?
>>
>> I'm not so sure. LC_ALL=C seems more problematic than -a:
>>
>> $ grep ф test.txt
>> фыва
>> $ grep -a ф test.txt
>> фыва
>> $ LC_ALL=C grep ф test.txt
>> (nothing)
>
> I guess this regression in Grep happened when they "internationalized"
> the DFA code, sigh...
>
FWIW, I "bisected" this with various versions of grep, and this regression
happened in 2014, between versions 2.20 and 2.21:
echo -ne "premi\xE8re\n" > latin1.txt
echo -ne "premi\xC3\xA8re\n" > utf8.txt
echo -ne "premi\xE8re\npremi\xC3\xA8re\n" > both.txt
With 2.20 with rxvt (which is clever enough to display UTF-8 and Latin-1 at the same time):
$ grep prem *.txt
both.txt:première
both.txt:première
latin1.txt:première
utf8.txt:première
With 2.20 with M-x shell (the \350 is a single character):
both.txt:premi\350re
both.txt:première
latin1.txt:premi\350re
utf8.txt:première
With 2.21, with rxvt or M-x shell:
grep prem *.txt
Binary file both.txt matches
Binary file latin1.txt matches
utf8.txt:première
next prev parent reply other threads:[~2020-11-29 19:49 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-28 18:03 dired-do-find-regexp failure with latin-1 encoding Stephen Berman
2020-11-28 18:11 ` Eli Zaretskii
2020-11-28 18:46 ` Stephen Berman
2020-11-28 19:13 ` Eli Zaretskii
2020-11-28 19:44 ` Stephen Berman
2020-11-28 19:49 ` Eli Zaretskii
2020-11-28 20:16 ` Dmitry Gutov
2020-11-28 20:29 ` Eli Zaretskii
2020-11-28 21:04 ` Dmitry Gutov
2020-11-29 0:49 ` Dmitry Gutov
2020-11-29 15:19 ` Eli Zaretskii
2020-11-29 16:27 ` Dmitry Gutov
2020-11-29 17:18 ` Eli Zaretskii
2020-11-29 17:32 ` Dmitry Gutov
2020-11-29 18:42 ` Eli Zaretskii
2020-11-29 19:48 ` Dmitry Gutov
2020-11-29 15:06 ` Eli Zaretskii
2020-11-29 15:14 ` Yuri Khan
2020-11-29 15:36 ` Stephen Berman
2020-11-29 15:50 ` Eli Zaretskii
2020-11-29 16:07 ` Dmitry Gutov
2020-11-29 17:12 ` Eli Zaretskii
2020-11-29 17:19 ` Dmitry Gutov
2020-11-29 17:25 ` Eli Zaretskii
2020-11-29 17:44 ` Dmitry Gutov
2020-11-29 18:51 ` Eli Zaretskii
2020-11-29 19:07 ` Dmitry Gutov
2020-11-29 19:32 ` Eli Zaretskii
2020-11-29 19:34 ` Eli Zaretskii
2020-11-29 19:49 ` Stephen Berman
2020-11-29 19:49 ` Gregory Heytings via Emacs development discussions. [this message]
2020-11-29 19:37 ` Juri Linkov
2020-11-30 1:08 ` Dmitry Gutov
2020-11-30 20:54 ` Juri Linkov
2020-12-01 0:34 ` Dmitry Gutov
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