NAME

       idn2_to_ascii_4i - API function

SYNOPSIS

       #include <idn2.h>

       int idn2_to_ascii_4i(const uint32_t * input, size_t inlen, char * output, int flags);

ARGUMENTS

       const uint32_t * input
                   zero terminated input Unicode (UCS-4) string.

       size_t inlen
                   number of elements in  input .

       char * output
                   pointer to newly allocated zero-terminated output string.

       int flags   optional idn2_flags to modify behaviour.

DESCRIPTION

       The  ToASCII  operation  takes  a  sequence of Unicode code points that make up one domain
       label and transforms it into a sequence of code points in  the  ASCII  range  (0..7F).  If
       ToASCII succeeds, the original sequence and the resulting sequence are equivalent labels.

       It is important to note that the ToASCII operation can fail.  ToASCII fails if any step of
       it fails. If any step of the ToASCII operation fails on any label in a domain  name,  that
       domain  name MUST NOT be used as an internationalized domain name.  The method for dealing
       with this failure is application-specific.

       The inputs to ToASCII are a sequence of code points.

       ToASCII never alters a sequence of code points that are all in the ASCII  range  to  begin
       with  (although it could fail). Applying the ToASCII operation multiple effect as applying
       it just once.

       When unsure, it is recommended to call this function  with  the  IDN2_NONTRANSITIONAL  and
       IDN2_NFC_INPUT flags.

       Return value: Returns IDN2_OK on success, or error code.

SINCE

       2.0.0

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.  As  an  alternative  you  may  obtain  the
       manual from:

              http://www.gnu.org/software/libidn2/manual/