Re: Character maps - GNU recode.

On Fri, Feb 11, 2000 at 12:23:21AM +1300, Carey Evans wrote:
> Perhaps there's a smaller number of mappings that we should consider,
> anyway.  Looking at the character sets, "-m 870" might as well use
> ISO-8859-2 instead of -1 anyway - the special characters won't make
> sense on a Latin-1 terminal either way.  (In fact, IBM's description
> of CCSID 870 is "Latin-2 Multilingual".)
> 
> I think this would go by the "Character Set" column in the IBM manual.
> Everything with character set 697 should work with ISO-8859-1.  For
> Greek, CCSID 423 with character set 218 would only work properly with
> ISO-8859-7 (or Windows codepage 1253).
> 
> That would make a total of 52 tables, if we support all the numeric
> EBCDIC CCSIDs in each direction, and pick an appropriate ISO-8859-x
> character set for each.  That's an enormous 13K of memory taken up.

Okay, you've convinced me.  I made a minor modification to the transmaps
script once, but I recall I just didn't follow it - are you game?

I figure we can, at a later date, move the tables out of the executable and
put them each in a file in /usr/share so that you'd have, for example,
/usr/share/en.   This should make things easier to maintain, and we can just
code the files to translate to UTF-16 or UTF4 or something at a later date.
The reverse table should be calculated when the table is loaded.

That would also alleviate that 13K memory issue. ;->

-Jay 'Eraserhead' Felice
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