[XeTeX] VIQR pre-processor wrotten in (Xe)TeX ?

[Bruno Le Floch]

Is it simply a matter of going through the string and replace various
characters by TeX accents (and take care of character order), or does
the result have to be Unicode?

E.g., does it have to be a(a^ → ăâ, or can it be a(a^ → \u{a}\^{a} ?
If the second one is ok, then it shouldn't be too hard to write the
conversion in TeX macros. Please provide a list of the necessary
conversion rules.

Regards,
Bruno