C++ check if unicode character is full width

Question

How to check if a unicode character is full width?

I use Win32 / MFC

For example, 中 is full width, A is not full width, Ｆ is full width, F is not full width.

Answer 1

What you need is to retrieve the East Asian Width of the character. You can do it by parsing the EastAsianWidth.txt file from the Unicode Character Database. I could not find a Win32 API that returns this info, but in Python, for example, you can use unicodedata.east_asian_width(unichr).

See the Annex #11 for the background of the problem and more information.