From: Gregory Heytings <gregory@heytings.org>
To: Dmitry Gutov <dgutov@yandex.ru>
Cc: 46859@debbugs.gnu.org
Subject: bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el
Date: Wed, 03 Mar 2021 17:42:17 +0000 [thread overview]
Message-ID: <4119ea30555e80bdcf7e@heytings.org> (raw)
In-Reply-To: <ae221795-5197-36c5-4e0e-e1cb97e2a076@yandex.ru>
[-- Attachment #1: Type: text/plain, Size: 841 bytes --]
>> I wrote too fast. In fact you can get the column number with GNU grep
>> without parsing the original line:
>>
>> grep -nb -oE '.{0,100}PATTERN.{0,100}'
>
> This outputs byte offset from the beginning of the file, doesn't it?
>
Yes. You get, for each match: the line number (from the beginning of the
file), the byte offset (from the beginning of the file) of the first
displayed character, and the context of the match.
>
> Which will require at least reading the file into memory to convert.
>
I don't understand what you mean by that, but it seems to me that in any
case it's much more efficient than parsing the output of grep with Elisp.
And you can easily get the byte offset of each beginning of line with
"grep -nbo '^.'", so calculating the byte offset from the beginning of the
line is easy.
next prev parent reply other threads:[~2021-03-03 17:42 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 20:40 bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-01 22:07 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-02 19:25 ` Juri Linkov
2021-03-02 21:13 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-02 21:37 ` Dmitry Gutov
2021-03-02 21:45 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-02 22:14 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-02 22:37 ` Dmitry Gutov
2021-03-03 16:13 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-03 17:29 ` Dmitry Gutov
2021-03-03 19:54 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-06 22:26 ` Dmitry Gutov
2021-03-07 1:29 ` Dmitry Gutov
2021-03-07 3:22 ` Dmitry Gutov
2021-03-07 20:03 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-08 2:48 ` Dmitry Gutov
2021-03-07 20:16 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-07 20:26 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-08 2:56 ` Dmitry Gutov
2021-03-10 2:06 ` Dmitry Gutov
2021-05-17 15:27 ` Lars Ingebrigtsen
2021-05-17 15:44 ` Dmitry Gutov
2021-05-17 16:57 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-05-18 0:39 ` Dmitry Gutov
2021-03-03 9:05 ` Juri Linkov
2021-03-03 9:52 ` Gregory Heytings
2021-03-03 12:47 ` Dmitry Gutov
2021-03-03 13:53 ` Gregory Heytings
2021-03-03 14:00 ` Dmitry Gutov
2021-03-03 15:04 ` Gregory Heytings
2021-03-03 17:11 ` Gregory Heytings
2021-03-03 17:26 ` Dmitry Gutov
2021-03-03 17:42 ` Gregory Heytings [this message]
2021-03-03 19:14 ` Dmitry Gutov
2021-03-03 19:34 ` Gregory Heytings
2021-03-03 19:52 ` Juri Linkov
2021-03-03 20:34 ` Gregory Heytings
2021-03-04 3:36 ` Eli Zaretskii
2021-03-04 9:19 ` Gregory Heytings
2021-03-04 14:08 ` Eli Zaretskii
2021-03-04 14:39 ` Gregory Heytings
2021-03-04 15:13 ` Eli Zaretskii
2021-03-04 16:47 ` Gregory Heytings
2021-03-04 17:13 ` Eli Zaretskii
2021-03-04 17:35 ` Gregory Heytings
2021-03-04 18:28 ` Eli Zaretskii
2021-03-06 12:31 ` Dmitry Gutov
2021-03-06 12:37 ` Dmitry Gutov
2021-03-06 12:54 ` Gregory Heytings
2021-03-06 14:26 ` Dmitry Gutov
2021-03-06 22:47 ` Gregory Heytings
2021-03-06 23:00 ` Dmitry Gutov
2021-03-06 23:24 ` Gregory Heytings
2021-03-07 3:08 ` Dmitry Gutov
2021-03-07 8:13 ` Gregory Heytings
2021-03-08 3:24 ` Dmitry Gutov
2021-03-08 8:26 ` Gregory Heytings
2021-03-08 11:47 ` Dmitry Gutov
2021-03-06 12:49 ` Gregory Heytings
2021-03-06 14:07 ` Dmitry Gutov
2021-03-03 20:30 ` Dmitry Gutov
2021-03-03 21:06 ` Gregory Heytings
2021-03-06 12:44 ` Dmitry Gutov
2021-03-06 12:58 ` Gregory Heytings
2021-03-06 14:06 ` Dmitry Gutov
2021-03-06 22:55 ` Gregory Heytings
2021-03-03 19:59 ` Juri Linkov
2021-03-04 2:50 ` Dmitry Gutov
2021-03-04 9:24 ` Juri Linkov
2021-03-04 17:20 ` Dmitry Gutov
2021-03-04 17:56 ` Juri Linkov
2021-03-04 18:57 ` Dmitry Gutov
2021-03-06 12:39 ` Dmitry Gutov
2021-03-03 16:14 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
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