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Groups > linux.debian.user > #194463

Re: utf

From Ben Caradoc-Davies <ben@transient.nz>
Newsgroups linux.debian.user
Subject Re: utf
Date 2018-04-03 22:50 +0200
Message-ID <vAB2p-4vD-9@gated-at.bofh.it> (permalink)
References <vzLQd-4cg-1@gated-at.bofh.it> <vzRsC-8m1-3@gated-at.bofh.it> <vA2o1-6N4-3@gated-at.bofh.it> <vApXj-5wU-1@gated-at.bofh.it>
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On 03/04/18 20:55, Darac Marjal wrote:
> If these things matter to you, it's better to convert from UTF-8 to 
> Unicode, first.

Fixed length encodings like UTF-32 will not fix broken assumptions about 
some relationship between byte length and number of characters because 
Unicode contains things like combining characters. What is the length of 
a string? Are you trying to count the number of glyphs? I do not think 
that you can do this by naïvely counting code points, regardless of 
encoding.

Because there is more than one way to represent an accented character, 
Unicode string comparison is nontrivial:
https://en.wikipedia.org/wiki/Unicode_equivalence

Kind regards,

-- 
Ben Caradoc-Davies <ben@transient.nz>
Director
Transient Software Limited <https://transient.nz/>
New Zealand

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Thread

utf mess-mate <mess-mate@gmx.com> - 2018-04-01 16:10 +0200
  Re: utf Curt <curty@free.fr> - 2018-04-01 17:50 +0200
  Re: utf Ionel Mugurel Ciobîcă <I.M.Ciobica@upcmail.nl> - 2018-04-01 18:30 +0200
  Re: utf Andre Majorel <aym-naibed@teaser.fr> - 2018-04-01 18:40 +0200
  Re: utf Ben Caradoc-Davies <ben@transient.nz> - 2018-04-01 22:10 +0200
    Re: utf Cindy-Sue Causey <butterflybytes@gmail.com> - 2018-04-02 00:50 +0200
      Re: utf Curt <curty@free.fr> - 2018-04-02 09:50 +0200
        Re: utf Richard Hector <richard@walnut.gen.nz> - 2018-04-02 11:40 +0200
        Re: utf Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-02 15:30 +0200
    Re: utf Andre Majorel <aym-naibed@teaser.fr> - 2018-04-02 09:50 +0200
      Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-02 14:40 +0200
        Re: Invalid UTF-8 byte? (was: Re: utf) <tomas@tuxteam.de> - 2018-04-02 15:10 +0200
        Re: Invalid UTF-8 byte? (was: Re: utf) Henrique de Moraes Holschuh <hmh@debian.org> - 2018-04-02 15:10 +0200
          Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-02 19:50 +0200
            Re: Invalid UTF-8 byte? (was: Re: utf) Henrique de Moraes Holschuh <hmh@debian.org> - 2018-04-02 20:20 +0200
              Re: Invalid UTF-8 byte? (was: Re: utf) <tomas@tuxteam.de> - 2018-04-02 20:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) tomas@tuxteam.de - 2018-04-02 21:00 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-02 21:10 +0200
        Re: Invalid UTF-8 byte? (was: Re: utf) Michael Lange <klappnase@freenet.de> - 2018-04-03 00:50 +0200
          Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-03 13:50 +0200
            Re: Invalid UTF-8 byte? (was: Re: utf) Nicolas George <george@nsup.org> - 2018-04-03 14:00 +0200
              Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-03 14:30 +0200
            Re: Invalid UTF-8 byte? (was: Re: utf) Michael Lange <klappnase@freenet.de> - 2018-04-03 14:10 +0200
              Re: Invalid UTF-8 byte? (was: Re: utf) Michael Lange <klappnase@freenet.de> - 2018-04-03 14:20 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) <tomas@tuxteam.de> - 2018-04-03 14:40 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Michael Lange <klappnase@freenet.de> - 2018-04-03 21:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-03 21:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Michael Lange <klappnase@freenet.de> - 2018-04-03 22:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-03 14:40 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 03:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 03:20 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Nicolas George <george@nsup.org> - 2018-04-04 13:30 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 14:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Nicolas George <george@nsup.org> - 2018-04-04 14:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 14:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Nicolas George <george@nsup.org> - 2018-04-04 15:00 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Andre Majorel <aym-naibed@teaser.fr> - 2018-04-04 16:20 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-04 16:30 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 18:00 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 18:00 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-04-04 20:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-04 14:30 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 15:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Don Armstrong <don@debian.org> - 2018-04-04 19:40 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Nicolas George <george@nsup.org> - 2018-04-04 19:50 +0200
                mbox vs maildir vs better formats [Re: Invalid UTF-8 byte? (was: Re:  utf)] Don Armstrong <don@debian.org> - 2018-04-04 20:00 +0200
                Re: mbox vs maildir vs better formats [Re: Invalid UTF-8 byte? (was:  Re: utf)] Nicolas George <george@nsup.org> - 2018-04-04 20:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 20:40 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Don Armstrong <don@debian.org> - 2018-04-04 20:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-05 14:40 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) deloptes <deloptes@gmail.com> - 2018-04-05 00:20 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 21:30 +0200
              Re: Invalid UTF-8 byte? (was: Re: utf) Henrique de Moraes Holschuh <hmh@debian.org> - 2018-04-04 13:20 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) <tomas@tuxteam.de> - 2018-04-04 16:10 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Henrique de Moraes Holschuh <hmh@debian.org> - 2018-04-04 20:50 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) <tomas@tuxteam.de> - 2018-04-04 21:30 +0200
                Re: Invalid UTF-8 byte? Ben Caradoc-Davies <ben@transient.nz> - 2018-04-04 23:50 +0200
                Re: Invalid UTF-8 byte? Michael Stone <mstone@debian.org> - 2018-04-05 01:00 +0200
                Re: Invalid UTF-8 byte? (was: Re: utf) Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-04-04 21:00 +0200
        Re: Invalid UTF-8 byte? (was: Re: utf) Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-04-04 20:30 +0200
          Re: Invalid UTF-8 byte? (was: Re: utf) rhkramer@gmail.com - 2018-04-04 21:30 +0200
      Re: utf Ben Caradoc-Davies <ben@transient.nz> - 2018-04-02 23:40 +0200
      Re: utf Darac Marjal <mailinglist@darac.org.uk> - 2018-04-03 11:00 +0200
        Re: utf Richard Hector <richard@walnut.gen.nz> - 2018-04-03 11:20 +0200
          Re: utf <tomas@tuxteam.de> - 2018-04-03 11:30 +0200
        Re: utf Nicolas George <george@nsup.org> - 2018-04-03 12:20 +0200
        Re: utf Ben Caradoc-Davies <ben@transient.nz> - 2018-04-03 22:50 +0200
          Re: utf Nicolas George <george@nsup.org> - 2018-04-03 23:00 +0200
            Re: utf Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-03 23:00 +0200
              Re: utf Nicolas George <george@nsup.org> - 2018-04-03 23:30 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-04 19:00 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-04 19:10 +0200
                Re: utf Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-04 19:30 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-04 19:40 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-04 19:40 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-04 19:40 +0200
                Re: utf Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-04 19:50 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-04 20:00 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-04 23:20 +0200
                Re: utf Richard Hector <richard@walnut.gen.nz> - 2018-04-05 02:30 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-05 14:10 +0200
                Re: utf Stefan Monnier <monnier@iro.umontreal.ca> - 2018-04-05 00:00 +0200
                Re: utf rhkramer@gmail.com - 2018-04-04 20:30 +0200
                Re: utf Joel Roth <joelz@pobox.com> - 2018-04-04 21:30 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-04 23:40 +0200
                Re: utf <tomas@tuxteam.de> - 2018-04-05 08:30 +0200
                Re: utf rhkramer@gmail.com - 2018-04-05 14:50 +0200
                Re: utf <tomas@tuxteam.de> - 2018-04-05 15:00 +0200
                Re: utf Nicolas George <george@nsup.org> - 2018-04-05 15:00 +0200
                Re: utf tomas@tuxteam.de - 2018-04-05 15:10 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-05 21:40 +0200
                Re: utf Stefan Monnier <monnier@iro.umontreal.ca> - 2018-04-05 23:30 +0200
                Re: utf deloptes <deloptes@gmail.com> - 2018-04-05 23:40 +0200
                Re: utf Stefan Monnier <monnier@iro.umontreal.ca> - 2018-04-06 03:20 +0200
                Re: utf <tomas@tuxteam.de> - 2018-04-06 09:00 +0200
                Re: utf Ben Caradoc-Davies <ben@transient.nz> - 2018-04-06 04:20 +0200
                Re: utf <tomas@tuxteam.de> - 2018-04-06 09:10 +0200
                Re: utf Stefan Monnier <monnier@iro.umontreal.ca> - 2018-04-05 19:00 +0200
                Re: utf rhkramer@gmail.com - 2018-04-05 20:00 +0200
              Re: utf Stefan Monnier <monnier@iro.umontreal.ca> - 2018-04-03 23:40 +0200
        Re: utf Henrique de Moraes Holschuh <hmh@debian.org> - 2018-04-04 14:20 +0200

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