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idna_to_ascii_4i(3)		    libidn		   idna_to_ascii_4i(3)

NAME
       idna_to_ascii_4i - convert Unicode domain name label to text

SYNOPSIS
       #include <idna.h>

       int idna_to_ascii_4i(const uint32_t * in, size_t inlen, char * out, int
       flags);

ARGUMENTS
       const uint32_t * in
		   input array with unicode code points.

       size_t inlen
		   length of input array with unicode code points.

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

       int flags   an	Idna_flags   value,   e.g.,  IDNA_ALLOW_UNASSIGNED  or
		   IDNA_USE_STD3_ASCII_RULES.

DESCRIPTION
       The ToASCII operation takes a sequence of Unicode code points that make
       up  one	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 deadling with  this
       failure is application-specific.

       The  inputs  to	ToASCII	 are a sequence of code points, the AllowUnas‐
       signed flag, and the UseSTD3ASCIIRules flag. The output of  ToASCII  is
       either a sequence of ASCII code points or a failure condition.

       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 times has exactly the same effect as apply‐
       ing it just once.

RETURN VALUE
       Returns 0 on success, or an Idna_rc error code.

REPORTING BUGS
       Report bugs to <bug-libidn@gnu.org>.

COPYRIGHT
       Copyright © 2002, 2003, 2004, 2005, 2006 Simon Josefsson.
       Permission is granted to make and distribute verbatim  copies  of  this
       manual  provided	 the  copyright	 notice and this permission notice are
       preserved on all copies.

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

	      info libidn

       should give you access to the complete manual.

libidn				     0.6.5		   idna_to_ascii_4i(3)
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