int idn2_register_ul(const char * ulabel, const char * alabel, char ** insertname, int flags);
- const char * ulabel
- input zero-terminated locale encoded string, or NULL.
- const char * alabel
- input zero-terminated ACE encoded string (xn--), or NULL.
- char ** insertname
- newly allocated output variable with name to register in DNS.
- int flags
- optional idn2_flags to modify behaviour.
DESCRIPTIONPerform IDNA2008 register string conversion on domain label ulabel and alabel, as described in section 4 of RFC 5891. Note that the input ulabel is assumed to be encoded in the locale's default coding system, and will be transcoded to UTF-8 and NFC normalized by this function.
It is recommended to supply both ulabel and alabel for better error checking, but supplying just one of them will work. Passing in only alabel is better than only ulabel. See RFC 5891 section 4 for more information.