or null if hostname is in some way invalid.
hostnameToUnicode
fn
string hostnameToUnicode(string hostname)Converts hostname to its canonical presentation form; a UTF-8 string in Unicode normalization form C, containing no uppercase letters, no forbidden characters, and no ASCII-encoded segments, and not ending with a trailing dot.
Of course if hostname is not an internationalized hostname, then the canonical presentation form will be entirely ASCII.
Parameters
hostname | a valid UTF-8 or ASCII hostname |
Returns
a UTF-8 hostname, which must be freed,