Re: Usage of standard-display-table in MSDOS

["Ehud Karni" <ehud@unix.mvs.co.il>]

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On Thu, 02 Sep 2010 21:32:21 Kenichi Handa wrote:
>
> Then, in he_IL locale, by which coding-system your file is
> decoded?  C-h C RET shows that coding-system near the top
> under the line "Coding system for saving this buffer:".

The coding-system-for-read is hebrew-iso-8bit.

> And I don't understand this part.
>
> > I then set the DOS Hebrew chars (128-144) each to a vector:
> >     [ 169 <the corresponding UNIX Hebrew char> ]
>
> 169 is not a "UNIX Hebrew char", i.e. not a Unicode
> character code of a Hebrew char, nor a code-point of a
> Hebrew character in iso-8859-8 character set.

Yes, that's my problem, I have Hebrew in #xE0-#xFA (iso-8859-8)
but I have other 8 bit bytes (most of them are graphic shapes
from the cp862 set).

> And, you wrote "a small part have MSDOS Hebrew (#x80-#x9A)",
> but #x9a is 154, not 144.  Is "144" above just a typo?

Just a typo, it should be 154.

All my data files are 8bit bytes, so for me it is always, character =
byte (at least externally).


> Perhaps, the following is the best way to understand what
> you want:
>
> (1) You at first make sample files and give me them.
> (2) Tell me how you want read that file exactly.
>     Just C-x C-f FILENAME RET, or M-x find-file-literally ....,
>     or C-x C-m c no-convesion RET C-x C-f FILENAME RET,
>     or ...
> (3) Show me how it should be displayed on a terminal by an
>     image.

I attach a tar.bz2 file with 3 files:
1. lit1 - the sample file.
2. lit1-tty.png - how it should show on text terminal.
3. lit1-x.png   - how it should show on X.

I can do it if I read the file with the iso-latin-1 coding-system
and change the display table to show the Hebrew glyphs for the Hebrew
[#xE0-#xFA] bytes. But in this way it is not Hebrew characters (e.g.
for the new bidi display). I want it the other way around, to read it
with hebrew-iso-8bit and to to tweak the display table to show all
the bytes not belonging to the Hebrew set.

I had similar problem a long time ago. In 2001 you suggested to use
the following code:

  (make-coding-system
      'hebrew-iso-8bit 2 ?8
      "ISO 2022 based 8-bit encoding for Hebrew (MIME:ISO-8859-8)"
      '(ascii hebrew-iso8859-8 nil nil
              nil ascii-eol ascii-cntl nil nil nil nil nil t)
      '((safe-charsets ascii hebrew-iso8859-8 eight-bit-control)
        (mime-charset . iso-8859-8)))

May be I can define a new coding system that will have bytes #x80-#xFF
as legal characters and be recognized as Hebrew variant.

Ehud.


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