punycode_encode(3)						      libidn							punycode_encode(3)

NAME

       punycode_encode - encode Unicode to Punycode

SYNOPSIS

       #include <punycode.h>

       int  punycode_encode(size_t  input_length, const punycode_uint [] input, const unsigned char [] case_flags, size_t * output_length, char []
       output);

ARGUMENTS

       size_t input_length
		   The number of code points in the input array and the number of flags in the case_flags array.

       const punycode_uint [] input
		   An array of code points.  They are presumed to be Unicode code points, but that is not strictly REQUIRED.  The  array  contains
		   code  points, not code units.  UTF-16 uses code units D800 through DFFF to refer to code points 10000..10FFFF.  The code points
		   D800..DFFF do not occur in any valid Unicode string.   The  code  points  that  can	occur  in  Unicode  strings  (0..D7FF  and
		   E000..10FFFF) are also called Unicode scalar values.

       const unsigned char [] case_flags
		   A  NULL  pointer  or  an array of boolean values parallel to the input array.  Nonzero (true, flagged) suggests that the corre-
		   sponding Unicode character be forced to uppercase after being decoded (if possible), and zero (false, unflagged) suggests  that
		   it be forced to lowercase (if possible).  ASCII code points (0..7F) are encoded literally, except that ASCII letters are forced
		   to uppercase or lowercase according to the corresponding case flags.  If case_flags is a NULL pointer then  ASCII  letters  are
		   left as they are, and other code points are treated as unflagged.

       size_t * output_length
		   The	caller	passes	in  the maximum number of ASCII code points that it can receive.  On successful return it will contain the
		   number of ASCII code points actually output.

       char [] output
		   An array of ASCII code points.  It is *not* null-terminated; it will contain zeros if and only if  the  input  contains  zeros.
		   (Of course the caller can leave room for a terminator and add one if needed.)

DESCRIPTION

       Converts a sequence of code points (presumed to be Unicode code points) to Punycode.

RETURN VALUE

       The  return  value  can	be  any of the Punycode_status values defined above except PUNYCODE_BAD_INPUT.	If not PUNYCODE_SUCCESS, then out-
       put_size and output might contain garbage.

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, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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								       1.15							punycode_encode(3)