Re: Problem with \doifelse testing of UTF-8 chars

[Hans Hagen <pragma@wxs.nl>]

On 22-4-2010 8:57, Jaroslav Hajtmar wrote:
> Hello,
> I have problem with testing of strings through \doifelse.
>
> I am loading data from external CSV file. CSV file is UTF-8 encoding.
> Data from external file I am reading to ConTeXt macro and I want compare
> content of macro (it is one utf-8 character) and other character as per
> example:
>
> (\onecharfromcsvfile contains one character from external CSV file)
>
> % I compare e.g. "m" character and content of macro \onecharfromcsvfile
> \def\result{\doifelse{m}{\onecharfromcsvfile}{true}{false} }
>
> \result is however always false
>
> When CSV file is CP-1250 encoding then macro does work right as well as
> classical TeX macro:
>
> \def\result{\if m\onecharfromcsvfile true\else false \fi}
>
> My question is:
> Just how modify macro as to work right when CSV file is UTF-8 encoding.

tricky as utf in mkii is using active chars ... it all depends a bit to 
what the character expands; depending on the macro one can also use

\convertargument#1\to\whatever like constructs and then compare the 
\whatever

> Thanx Jaroslav
>
> PS: I was working up until now only with CP-1250 encoding, but when I
> started with LuaTeX (MKIV), then I have to use UTF-8. (MKIV dont work
> corectly with external CP-1250 files).

oh? regimes are supposed to work ok in mkiv

Hans


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