IDNA::Punycode(3pm) User Contributed Perl Documentation IDNA::Punycode(3pm)NAME
IDNA::Punycode - encodes Unicode string in Punycode
SYNOPSIS
use IDNA::Punycode;
idn_prefix('xn--');
$punycode = encode_punycode($unicode);
$unicode = decode_punycode($punycode);
DESCRIPTION
IDNA::Punycode is a module to encode / decode Unicode strings into Punycode, an efficient encoding of Unicode for use with IDNA.
This module requires Perl 5.6.0 or over to handle UTF8 flagged Unicode strings.
FUNCTIONS
This module exports following functions by default.
encode_punycode
$punycode = encode_punycode($unicode);
takes Unicode string (UTF8-flagged variable) and returns Punycode encoding for it.
decode_punycode
$unicode = decode_punycode($punycode)
takes Punycode encoding and returns original Unicode string.
idn_prefix
idn_prefix($prefix);
causes encode_punycode() to add $prefix to ACE-string after conversion. As a side-effect decode_punycode() will only consider strings
beginning with $prefix as punycode representations.
According to RFC 3490 the ACE prefix "xn--" had been chosen as the standard. Thus, "xn--" is also the default ACE prefix. For compat-
ibility I'm leaving idn_prefix() in the module. Use "idn_prefix(undef)" to get the old behaviour.
These functions throws exceptionsn on failure. You can catch 'em via "eval".
AUTHORS
Tatsuhiko Miyagawa <miyagawa@bulknews.net> is the original author and wrote almost all the code.
Robert Urban <urban@UNIX-Beratung.de> added "idn_prefix()".
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
http://www.ietf.org/internet-drafts/draft-ietf-idn-punycode-01.txt
Encode::Punycode
perl v5.8.8 2005-09-01 IDNA::Punycode(3pm)
Check Out this Related Man Page
punycode_decode(3) libidn punycode_decode(3)NAME
punycode_decode - decode Punycode to Unicode
SYNOPSIS
#include <punycode.h>
int punycode_decode(size_t input_length, const char [] input, size_t * output_length, punycode_uint [] output, unsigned char []
case_flags);
ARGUMENTS
size_t input_length
The number of ASCII code points in the input array.
const char [] input
An array of ASCII code points (0..7F).
size_t * output_length
The caller passes in the maximum number of code points that it can receive into the output array (which is also the maximum
number of flags that it can receive into the case_flags array, if case_flags is not a NULL pointer). On successful return it
will contain the number of code points actually output (which is also the number of flags actually output, if case_flags is not
a null pointer). The decoder will never need to output more code points than the number of ASCII code points in the input,
because of the way the encoding is defined. The number of code points output cannot exceed the maximum possible value of a
punycode_uint, even if the supplied output_length is greater than that.
punycode_uint [] output
An array of code points like the input argument of punycode_encode() (see above).
unsigned char [] case_flags
A NULL pointer (if the flags are not needed by the caller) or an array of boolean values parallel to the output array. Nonzero
(true, flagged) suggests that the corresponding Unicode character be forced to uppercase by the caller (if possible), and zero
(false, unflagged) suggests that it be forced to lowercase (if possible). ASCII code points (0..7F) are output already in the
proper case, but their flags will be set appropriately so that applying the flags would be harmless.
DESCRIPTION
Converts Punycode to a sequence of code points (presumed to be Unicode code points).
RETURN VALUE
The return value can be any of the Punycode_status values defined above. If not PUNYCODE_SUCCESS, then output_length, output, and
case_flags 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_decode(3)