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
                   output  zero  terminated  string  that  must  have  room  for at least 63 characters plus the
                   terminating zero.

       int flags   optional idn2_flags to modify behaviour.

DESCRIPTION

       THIS FUNCTION HAS BEEN DEPRECATED DUE TO A DESIGN FLAW. USE idn2_to_ascii_4i2() INSTEAD !

       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.

       The default behavior of this function (when flags are zero) is to apply the IDNA2008  rules  without  the
       TR46  amendments.  As  the  TR46  non-transitional  processing is nowadays ubiquitous, when unsure, it is
       recommended to call this  function  with  the  IDN2_NONTRANSITIONAL  and  the  IDN2_NFC_INPUT  flags  for
       compatibility with other software.

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

SINCE

       2.0.0

DEPRECATED

       2.1.1: Use idn2_to_ascii_4i2().

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:

              https://www.gnu.org/software/libidn/libidn2/manual/

libidn2                                           2.3.1.48-1925                              idn2_to_ascii_4i(3)