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Groups > linux.debian.user > #224916
| From | davidson <davidson@freevolt.org> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: how u mine 4 utf8 [was Re: Using .XCompose] |
| Date | 2020-07-18 09:20 +0200 |
| Message-ID | <AtPix-6Iv-7@gated-at.bofh.it> (permalink) |
| References | (9 earlier) <ArkVz-5gw-1@gated-at.bofh.it> <ArLCp-4oG-3@gated-at.bofh.it> <AsZ0B-7St-5@gated-at.bofh.it> <AtgXw-1P5-13@gated-at.bofh.it> <AtJG9-3fx-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sat, 18 Jul 2020 davidson wrote:
> On Thu, 16 Jul 2020 Ajith R wrote:
>> On Thursday 16 July 2020 4:54:09 AM IST davidson wrote:
[snip]
> I recommend two references I found helpful, though I didn't read
> either one especially carefully. I mostly just stared at the templates
> (the UTF-8 fighters below), repeatedly asked myself "why did they do
> it that way?" and then skimmed to confirm guesses.
>
> First, utf-8(7).
>
> $ man 7 utf-8
These two too:
RFC 3629 - UTF-8, a transformation format of ISO 10646 (14 pages)
https://tools.ietf.org/html/rfc3629
The Unicode Consortium. The Unicode Standard.
http://www.unicode.org/versions/latest/
In present version 13.0.0 of the latter,
* A brief feature summary of UTF-8 (in chapter 2, General Structure)
on pages 37-38
* on page 124 (in section 3.9) is a chart that I think makes the
mapping from unicode code points to UTF-8 especially clear.
* Section 3.9 "Unicode Encoding Forms". Formal definitions, if one
enjoys that kind of thing.
[snip]
> So given a unicode code point, do this:
>
> 1. discard its leading 0 bits,
> 2. count how many bits you have left (which is how many x you will
> need from the templates below), and
> 3. pick your UTF-8 fighter:
And pick the shortest one that works. Choosing a longer one will give
invalid result.
>
> 1 octet (7 bits) 0xxx xxxx
> 2 octets (11 bits) 110x xxxx 10xx xxxx
> 3 octets (16 bits) 1110 xxxx 10xx xxxx 10xx xxxx
> 4 octets (21 bits) 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx
[snip]
--
Ce qui est important est rarement urgent
et ce qui est urgent est rarement important
-- Dwight David Eisenhower
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Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-06 07:40 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-06 14:30 +0200
Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-06 14:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-06 21:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-06 22:40 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-07 17:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-07 08:40 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-07 17:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-09 23:50 +0200
Re: Using .XCompose [resend of xev_output_annotated.txt] davidson <davidson@freevolt.org> - 2020-07-10 03:40 +0200
Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-10 10:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-11 10:40 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-11 12:30 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-12 17:00 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-13 06:00 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-13 14:00 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-13 20:30 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-13 20:40 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-13 20:50 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-13 21:50 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-14 05:40 +0200
Fw: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-15 16:50 +0200
Fw: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-15 17:10 +0200
Fw: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-15 17:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-16 01:30 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-16 02:40 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-16 20:40 +0200
how u mine 4 utf8 [was Re: Using .XCompose] davidson <davidson@freevolt.org> - 2020-07-18 03:20 +0200
UTF-8 Everywhere -- Re: how u mine 4 utf8 [was Re: Using .XCompose] Zenaan Harkness <zenaan@freedbms.net> - 2020-07-18 07:40 +0200
Re: how u mine 4 utf8 [was Re: Using .XCompose] davidson <davidson@freevolt.org> - 2020-07-18 09:20 +0200
Re: how u mine 4 utf8 [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-19 13:00 +0200
Fw: how u mine 4 utf8 [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-19 12:50 +0200
Re: Fw: how u mine 4 utf8 [was Re: Using .XCompose] Tom Browder <tom.browder@gmail.com> - 2020-07-19 13:10 +0200
Re: how u mine 4 utf8 [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-19 13:50 +0200
sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] davidson <davidson@freevolt.org> - 2020-07-18 12:10 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] Zenaan Harkness <zenaan@freedbms.net> - 2020-07-18 12:50 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] William Michels <wjm1@caa.columbia.edu> - 2020-07-18 22:00 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] Andrei POPESCU <andreimpopescu@gmail.com> - 2020-07-18 13:20 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] songbird <songbird@anthive.com> - 2020-07-18 21:00 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] <tomas@tuxteam.de> - 2020-07-18 16:00 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] mick crane <mick.crane@gmail.com> - 2020-07-18 22:40 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] <tomas@tuxteam.de> - 2020-07-18 23:10 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] mick crane <mick.crane@gmail.com> - 2020-07-18 23:30 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] <tomas@tuxteam.de> - 2020-07-19 10:40 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] mick crane <mick.crane@gmail.com> - 2020-07-20 13:20 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] David Christensen <dpchrist@holgerdanske.com> - 2020-07-19 01:50 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-19 12:50 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] David Christensen <dpchrist@holgerdanske.com> - 2020-07-19 23:30 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-19 13:40 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] William Michels <wjm1@caa.columbia.edu> - 2020-07-19 21:50 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] David Wright <deblis@lionunicorn.co.uk> - 2020-07-23 04:00 +0200
Re: sed:awk:perl::rock:paper:chainsaw [was Re: Using .XCompose] songbird <songbird@anthive.com> - 2020-07-23 12:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-16 02:00 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-16 20:40 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-11 17:00 +0200
Tex characters Teemu Likonen <tlikonen@iki.fi> - 2020-07-11 18:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-11 22:40 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-13 14:00 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-16 07:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-11 18:10 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-20 15:30 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-20 15:30 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-20 18:20 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-10 12:50 +0200
Re: [offlist] posting style [was Re: Using .XCompose] Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-08 05:00 +0200
Re: [offlist] posting style [was Re: Using .XCompose] Andrei POPESCU <andreimpopescu@gmail.com> - 2020-07-08 07:00 +0200
Re: [not-so-offlist] posting style [was Re: Using .XCompose] davidson <davidson@freevolt.org> - 2020-07-08 07:10 +0200
Re: [offlist] Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-08 05:00 +0200
Re: [offlist] Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-08 05:20 +0200
Re: [offlist] Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-08 05:40 +0200
Re: [offlist] Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-08 08:00 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-07 00:40 +0200
tangent on man page locations [was Re: Using .XCompose] davidson <davidson@freevolt.org> - 2020-07-07 01:10 +0200
Re: tangent on man page locations [was Re: Using .XCompose] David Wright <deblis@lionunicorn.co.uk> - 2020-07-07 03:50 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-07 11:50 +0200
Re: Using .XCompose Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-07 13:40 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-08 16:30 +0200
Re: Using .XCompose David Wright <deblis@lionunicorn.co.uk> - 2020-07-09 02:20 +0200
Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-09 04:20 +0200
Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-08 01:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-08 02:30 +0200
Fw: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-08 05:10 +0200
Re: Using .XCompose Ajith R <ajithramayyan@yahoo.co.in> - 2020-07-08 18:40 +0200
Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-09 04:00 +0200
Re: Using .XCompose Zenaan Harkness <zenaan@freedbms.net> - 2020-07-10 02:40 +0200
Re: Using .XCompose The Wanderer <wanderer@fastmail.fm> - 2020-07-10 02:50 +0200
Re: Using .XCompose davidson <davidson@freevolt.org> - 2020-07-10 05:00 +0200
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