Question

Recently I’ve been dealing with texts with mixed languages, including Chinese, English, and even some emoticons.

I’ve been searching for this issue quite a lot, but the only thing I can find is “to replace full-width characters with half-width characters” rather than telling you how to determine whether the character is a half- or full-width word.

So, my question is:

Is it possible to tell whether a word is half-width or full-width?

Answer 1

In unicode 6.1, there is the block Halfwidth and Fullwidth forms, pdf here.

Within this block, \uFF01-\uFF60 and \uFFE0-\uFFE6 are fullwidth, while \uFF61-\uFFDC and \uFFE8-\uFFEE are halfwidth.