What is the intended bahaviour of recoding characters outside the target range?

[Troy]

ICU also provides the options in its library functions
(UCNV_FROM_U_CALLBACK_SKIP etc. arguments to ucnv_setFromUCallBack()).

Default behavior could be what it is now. Adding a 
function to set a callback would give users the ability to 
specify different behavior. This shouldn't break existing 
programs. 

I can't comment on the amount of work this might require,
since I don't have time to work on it myself. 

Cheers,


Troy



> 
> > I opine that it would make sense to model the solution after 
> > uconv, which is ICU project's replacement for iconv. uconv
> > allows the user to specify what to do with such data with the 
> > --to-callback option. E.g. escape-xml, escape-unicode, stop, skip, 
> > etc..
> 
> While this is acceptable for a command line tool, I don't think it will
> be appropriate for all cases - for example when the library is used by
> programs, for then the programmer would have to think about different
> options given to functions, while the functions would be almost
> certainly fixed by existing standards.
> Things could be controlled by environment variables but this is going to
> change current behavior somewhat and increase the environment.
> Still - this will be a largish project that I am not sure I will be able
> to complete and I am yet uncertain whether it is necessary.
> 
> 
> Kind regards:
> al_shopov
> 
>