ncstrwidth

libnotcurses_sys::c_api

Function ncstrwidth 

Source 
pub unsafe extern "C" fn ncstrwidth(
    egcs: *const c_char,
    validbytes: *mut c_int,
    validwidth: *mut c_int,
) -> c_int
Expand description

Returns the number of columns occupied by the longest valid prefix of a multibyte (UTF-8) string. If an invalid character is encountered, -1 will be returned, and the number of valid bytes and columns will be written into *|validbytes| and *|validwidth| (assuming them non-NULL). If the entire string is valid, *|validbytes| and *|validwidth| reflect the entire string.