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Re: Reverse a string (with xchars)

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From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.lang.forth
Subject Re: Reverse a string (with xchars)
Date Sun, 21 Feb 2016 12:07:53 -0800
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Chris Curl <ccurl609@gmail.com> writes:
> Since each unicode UTF-16 character is 2 bytes instead of 1, why
> wouldn't something like this work?

UTF-16 is a variable length encoding, like UTF-8.  Remember there are
more than a million Unicode code points.  So you can't always specify
one with 2 bytes.  Plus as Anton says, there is the issue of composing
characters:

  https://en.wikipedia.org/wiki/Unicode_normalization

That means certain characters with diacritics have multiple encodings
some of which use more than one code point, and you have to handle
reversing them.

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Reverse a string (with xchars) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-02-19 09:00 +0000
  Re: Reverse a string (with xchars) mentificium@gmail.com - 2016-02-20 23:44 -0800
  Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 10:18 -0800
    Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 10:24 -0800
      Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 10:35 -0800
        Re: Reverse a string (with xchars) Paul Rubin <no.email@nospam.invalid> - 2016-02-21 12:07 -0800
          Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 12:40 -0800
            Re: Reverse a string (with xchars) Paul Rubin <no.email@nospam.invalid> - 2016-02-21 12:50 -0800
            Re: Reverse a string (with xchars) Paul Rubin <no.email@nospam.invalid> - 2016-02-21 12:56 -0800
              Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 14:43 -0800
                Re: Reverse a string (with xchars) Paul Rubin <no.email@nospam.invalid> - 2016-02-21 14:59 -0800
                Re: Reverse a string (with xchars) Chris Curl <ccurl609@gmail.com> - 2016-02-21 16:55 -0800
              Re: Reverse a string (with xchars) Albert van der Horst <albert@spenarnc.xs4all.nl> - 2016-02-22 09:37 +0000

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