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CentOS 7.0 - man page for idna_to_ascii_4i (centos section 3)

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/soft-
       ware/libidn/ General help using GNU software: http://www.gnu.org/gethelp/

COPYRIGHT
       Copyright (C) 2002-2013 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					       1.28			      idna_to_ascii_4i(3)


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