NAME
====

Net::LibIDN2 - Perl6 bindings for GNU LibIDN2

SYNOPSIS
========

        use Net::LibIDN2;

        my $idn := Net::LibIDN2.new;

        my Int $code;
        my $lookup := $idn.lookup_u8('test', IDN2_NFC_INPUT, $code);
        say "$lookup $code"; # test 0

        my $result := $idn.register_u8("m\xFC\xDFli", 'xn--mli-5ka8l', IDN2_NFC_INPUT, $code);
        say "$result $code"; # xn--mli-5ka8l 0

        say $idn.strerror($code);      # success
        say $idn.strerror_name($code); # IDN2_OK

DESCRIPTION
===========

Net::LibIDN2 is a Perl 6 wrapper for the GNU LibIDN2 library.

METHODS
=======

  * check_version(Str $version? --> Str)

Compares $version against the version of LibIDN2 installed and returns either an empty string if $version is greater than the version installed, or IDN2_VERSION otherwise.

  * strerror(Int $errno --> Str)

Returns the error represented by $errno in human readable form.

  * strerror_name(Int $errno --> Str)

Returns the internal error name of $errno.

  * lookup_u8(Str $input, Int $flags?, Int $code is rw --> Str)

Performs an IDNA2008 lookup string conversion on $input. See RFC 5891, section 5. $input must be a UTF8 encoded string in NFC form if no IDN2_NFC_INPUT flag is passed.

  * register_u8(Str $uinput, Str $ainput, Int $flags?, Int $code is rw --> Str)

Performs an IDNA2008 register string conversion on $uinput and $ainput. See RFC 5891, section 4. $uinput must be a UTF8 encoded string in NFC form if no IDN2_NFC_INPUT flag is passed. $ainput must be an ACE encoded string.

CONSTANTS
=========

  * Int IDN2_LABEL_MAX_LENGTH

The maximum label length.

  * Int IDN2_DOMAIN_MAX_LENGTH

The maximum domain name length.

VERSIONING
----------

  * Str IDN2_VERSION

The version of LibIDN2 installed.

  * Int IDN2_VERSION_NUMBER

The version of LibIDN2 installed represented as a 32 bit integer. The first pair of bits represents the major version, the second represents the minor version, and the last 4 represent the patch version.

  * Int IDN2_VERSION_MAJOR

The major version of LibIDN2 installed.

  * Int IDN2_VERSION_MINOR

The minor version of LidIDN2 installed.

  * Int IDN2_VERSION_PATCH

The patch version of LibIDN2 installed.

FLAGS
-----

  * Int IDN2_NFC_INPUT

Normalize the input string using the NFC format.

  * Int IDN2_ALABEL_ROUNDTRIP

Perform optional IDNA2008 lookup roundtrip check.

  * Int IDN2_TRANSITIONAL

Perform Unicode TR46 transitional processing.

  * Int IDN2_NONTRANSITIONAL

Perform Unicode TR46 non-transitional processing.

ERRORS
------

  * Int IDN2_OK

Success.

  * Int IDN2_MALLOC

Memory allocation failure.

  * Int IDN2_NO_CODESET

Failed to determine a string's encoding.

  * Int IDN2_ICONV_FAIL

Failed to transcode a string to UTF8.

  * Int IDN2_ENCODING_ERROR

Unicode data encoding error.

  * Int IDN2_NFC

Failed to normalize a string.

  * Int IDN2_PUNYCODE_BAD_INPUT

Invalid input to Punycode.

  * Int IDN2_PUNYCODE_BIG_OUTPUT

Punycode output buffer is too small.

  * Int IDN2_PUNYCODE_OVERFLOW

Punycode conversion would overflow.

  * Int IDN2_TOO_BIG_DOMAIN

Domain is larger than IDN2_DOMAIN_MAX_LENGTH

  * Int IDN2_TOO_BIG_LABEL

Label is larger than IDN2_LABEL_MAX_LENGTH

  * Int IDN2_INVALID_ALABEL

Invalid A-label.

  * Int IDN2_UALABEL_MISMATCH

Given U-label and A-label do not match.

  * Int IDN2_INVALID_FLAGS

Invalid combination of flags.

  * Int IDN2_NOT_NFC

String is not normalized in NFC format.

  * Int IDN2_2HYPHEN

String has forbidden two hyphens.

  * Int IDN2_HYPHEN_STARTEND

String has forbidden start/end hyphen.

  * Int IDN2_LEADING_COMBINING

String has forbidden leading combining character.

  * Int IDN2_DISALLOWED

String has disallowed character.

  * Int IDN2_CONTEXTJ

String has forbidden context-j character.

  * Int IDN2_CONTEXTJ_NO_RULE

String has context-j character without any rull.

  * Int IDN2_CONTEXTO

String has forbidden context-o character.

  * Int IDN2_CONTEXTO_NO_RULE

String has context-o character without any rull.

  * Int IDN2_UNASSIGNED

String has forbidden unassigned character.

  * Int IDN2_BIDI

String has forbidden bi-directional properties.

  * Int IDN2_DOT_IN_LABEL

Label has forbidden dot (TR46).

  * Int IDN2_INVALID_TRANSITIONAL

Label has a character forbidden in transitional mode (TR46).

  * Int IDN2_INVALID_NONTRANSITIONAL

Label has a character forbidden in non-transitional mode (TR46).

AUTHOR
======

Ben Davies <kaiepi@outlook.com>

COPYRIGHT AND LICENSE
=====================

Copyright 2017 Ben Davies

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.