Encode::JP

version 2.04

You are viewing the version of this documentation from Perl 5.18.2. View the latest version

NAME
SYNOPSIS
ABSTRACT
DESCRIPTION
Note on ISO-2022-JP(-1)?
BUGS
SEE ALSO

#NAME

Encode::JP - Japanese Encodings

#SYNOPSIS

use Encode qw/encode decode/; 
$euc_jp = encode("euc-jp", $utf8); # loads Encode::JP implicitly
$utf8 = decode("euc-jp", $euc_jp); # ditto

#ABSTRACT

This module implements Japanese charset encodings. Encodings supported are as follows.

Canonical Alias		Description
--------------------------------------------------------------------
euc-jp /\beuc.*jp$/i	EUC (Extended Unix Character)
 /\bjp.*euc/i 
 /\bujis$/i
shiftjis /\bshift.*jis$/i	Shift JIS (aka MS Kanji)
 /\bsjis$/i
7bit-jis /\bjis$/i		7bit JIS
iso-2022-jp			ISO-2022-JP [RFC1468]
 = 7bit JIS with all Halfwidth Kana 
 converted to Fullwidth
iso-2022-jp-1			ISO-2022-JP-1 [RFC2237]
 = ISO-2022-JP with JIS X 0212-1990
 support. See below
MacJapanese	 Shift JIS + Apple vendor mappings
cp932 /\bwindows-31j$/i Code Page 932
 = Shift JIS + MS/IBM vendor mappings
jis0201-raw JIS0201, raw format
jis0208-raw JIS0201, raw format
jis0212-raw JIS0201, raw format
--------------------------------------------------------------------

#DESCRIPTION

To find out how to use this module in detail, see Encode.

#Note on ISO-2022-JP(-1)?

ISO-2022-JP-1 (RFC2237) is a superset of ISO-2022-JP (RFC1468) which adds support for JIS X 0212-1990. That means you can use the same code to decode to utf8 but not vice versa.

$utf8 = decode('iso-2022-jp-1', $stream);

and

$utf8 = decode('iso-2022-jp', $stream);

yield the same result but

$with_0212 = encode('iso-2022-jp-1', $utf8);

is now different from

$without_0212 = encode('iso-2022-jp', $utf8 );

In the latter case, characters that map to 0212 are first converted to U+3013 (0xA2AE in EUC-JP; a white square also known as 'Tofu' or 'geta mark') then fed to the decoding engine. U+FFFD is not used, in order to preserve text layout as much as possible.

#BUGS

The ASCII region (0x00-0x7f) is preserved for all encodings, even though this conflicts with mappings by the Unicode Consortium.

#SEE ALSO

Encode