Alastair Reid wrote:
The other interpretation is that all glyphs have widths which are an integral number of "columns". Western (latin, cyrillic, Greek) characters are a single column wide, while CJK characters are typically two columns wide. The (Unix98) wcwidth() function can be used to obtain the width (in columns) of a given wide character (wchar_t) in the current locale.
The (Unix98) wcwidth() function can be used to obtain the width (in columns) of a given wide character (wchar_t) in the current locale. ^^^^^^^^^^^^^^^^^^^^^ Can you clarify whether this is because the mapping of wchar_ts onto Unicode code points depends on the locale or whether the width of a Unicode code point depends on the locale.
It's basically the former, although Unicode doesn't come into it
directly. The locale (specifically, the LC_CTYPE category) determines
the character encoding, and hence the "meaning" of any given wchar_t
(or char) value.
--
Glynn Clements