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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 interna-
       tionalized 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-libidnATgnu.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, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Simon Josefsson.
       Copying  and  distribution of this file, with or without modification, are permitted in any medium without roy-
       alty 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 prop-
       erly installed at your site, the command

              info libidn

       should give you access to the complete manual.



libidn                               1.18                  idna_to_ascii_4i(3)