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/