Re: [icu-design] Fast span?

[Andy H. <and...@gm...>]

On 10/14/05, Deborah Goldsmith <gol...@ap...> wrote:
> What I want to do is scan forward from an index and find
> the first character that is not in a particular Unicode set.

Since there's no existing function that does exactly what you're
looking for, it sounds like the thing to do is just use the obvious
two-line loop, and worry about it later if it turns out to be too
slow.

I doubt that there is any huge gain to be had beyond the straight
forward loop in any event.  UText will be pretty quick at getting
characters.  If the range of characters handled by a dictionary
typically covers a single script, UnicodeSet's range-list binary
search should degenerate to something short.  All that's left is the
per-character function call overhead into UnicodeSet and the
per-character range checking on UText.



On 10/14/05, Deborah Goldsmith <gol...@ap...> wrote:
> I don't think that would work for this application, since it's for
> text break. What I want to do is scan forward from an index and find
> the first character that is not in a particular Unicode set. Since
> it's inside text break, the text is represented by a
> CharacterIterator (and in the future I assume UText).
>