Provided by: libidn2-dev_2.3.7-2build1.1_amd64 bug

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
       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.


WARNING
       With  version 2.1.1 until before version 2.3.5 this function was deprecated in favor idn2_to_ascii_4i2().
       We still encourage you to use idn2_to_ascii_4i2() when appropriate.


RETURNS
       On  successful  conversion  IDN2_OK  is  returned;  if  the  output  label  would  have  been  too   long
       IDN2_TOO_BIG_LABEL is returned, or another error code is returned.


SINCE
       2.0.0


REPORTING BUGS
       Report bugs to <help-libidn@gnu.org>.
       General guidelines for reporting bugs: https://www.gnu.org/gethelp/
       Libidn2 home page: https://www.gnu.org/software/libidn2/


COPYRIGHT
       Copyright © 2002-2024 Simon Josefsson.
       Copying  and distribution of this file, with or without modification, are permitted in any medium without
       royalty provided the copyright notice and this notice are preserved.


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                                               2.3.7                                  idn2_to_ascii_4i(3)