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punycode_encode(3) libidn punycode_encode(3)
NAME
punycode_encode - API function
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 corresponding 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 PUNY-
CODE_BAD_INPUT. If not PUNYCODE_SUCCESS, then output_size and output might contain
garbage.
REPORTING BUGS
Report bugs to <bug-libidn AT 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 punycode_encode(3)
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On Apache
Under GNU General Public License
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