idna_to_ascii_4i(3)						      libidn						       idna_to_ascii_4i(3)

NAME

       idna_to_ascii_4i - API function

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 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 deadling with
       this failure is application-specific.

       The inputs to ToASCII are a sequence of code points, the AllowUnassigned 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 applying it just once.

RETURN VALUE

       Returns 0 on success, or an Idna_rc error code.

REPORTING BUGS

       Report bugs to  <bug-libidn@gnu.org>.   GNU  Libidn  home  page:  http://www.gnu.org/software/libidn/  General  help  using  GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2002-2012 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 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								       1.25						       idna_to_ascii_4i(3)