- occurs, -1 is returned, unless MBSW_ACCEPT_UNPRINTABLE is specified.
- With flags = 0, this is the multibyte analogon of the wcswidth function. */
+ occurs, and MBSW_REJECT_UNPRINTABLE is specified, -1 is returned.
+ With flags = MBSW_REJECT_INVALID | MBSW_REJECT_UNPRINTABLE, this is
+ the multibyte analogon of the wcswidth function. */