Return the column width of a Unicode codepoint.
@param cp The codepoint value. @return The width, in columns, of the Unicode codepoint, or -1 if the codepoint is unprintable.
See Implementation
Return the column width of a Unicode codepoint.
@param cp The codepoint value. @return The width, in columns, of the Unicode codepoint, or -1 if the codepoint is unprintable.