On 2012-02-10 11:22, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
> Hello,
> 
> I have many files with ASCII encoding; this encoding must be kept as these files are processed also by another program.
> 
> When I work with them in ConTeXt, I need to convert them to UTF.

Not needed, as every ASCII string is a valid UTF8  string:
   “The UTF encoding has several good properties. By far the most
    important is that a byte in the ASCII range 0-127 represents
    itself in UTF. Thus UTF is backward compatible with ASCII.”
    http://doc.cat-v.org/plan_9/4th_edition/papers/utf
You can use them in Luatex without further conversion.

Regards
Philipp


> 
> Does Lua (in ConTeXt scope) offer a transformation function or a table of chars [ASCII-code] -> [UTF-code] or anything to provide the conversion?
> 
> Something like:
> 
> \startluacode
>   local str = loadFile("a.txt") -- ASCII coded
> 
>   str = context.ACSII2UTF(str) -- Or something like this
> \stopluacode
> 
> Best regards,
> 
> Lukas
> 
> 
> -- 
> Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
> Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
> Bezová 1658
> 147 14 Praha 4
> 
> Tel: +420 244 062 238
> Fax: +420 244 461 038
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

-- 
()  ascii ribbon campaign - against html e-mail
/\  www.asciiribbon.org   - against proprietary attachments