NAME

       idn2_lookup_ul - API function

SYNOPSIS

       #include <idn2.h>

       int idn2_lookup_ul(const char * src, char ** lookupname, int flags);

ARGUMENTS

       const char * src
                   input zero-terminated locale encoded string.

       char ** lookupname
                   newly allocated output variable with name to lookup in DNS.

       int flags   optional idn2_flags to modify behaviour.

DESCRIPTION

       Perform IDNA2008 lookup string conversion on domain name src, as described in section 5 of
       RFC 5891.  Note that the input 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.

       Pass  IDN2_ALABEL_ROUNDTRIP in flags to convert any input A-labels to U-labels and perform
       additional testing.

RETURNS

       On successful conversion IDN2_OK is returned, if conversion from  locale  to  UTF-8  fails
       then  IDN2_ICONV_FAIL  is  returned, if the output domain or any label would have been too
       long IDN2_TOO_BIG_DOMAIN or IDN2_TOO_BIG_LABEL is  returned,  or  another  error  code  is
       returned.

SEE ALSO

       The  full  documentation  for  libidn2 is maintained as a Texinfo manual.  If the info and
       libidn2 programs are properly installed at your site, the command

              info libidn2

       should give you access to the complete manual.