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.\" ========================================================================
.\"
.IX Title "Encode::JP 3"
.TH Encode::JP 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
.SH "NAME"
Encode::JP \- Japanese Encodings
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\&    use Encode qw/encode decode/; 
\&    $euc_jp = encode("euc-jp", $utf8);   # loads Encode::JP implicitly
\&    $utf8   = decode("euc-jp", $euc_jp); # ditto
.Ve
.SH "ABSTRACT"
.IX Header "ABSTRACT"
This module implements Japanese charset encodings.  Encodings
supported are as follows.
.PP
.Vb 21
\&  Canonical   Alias             Description
\&  --------------------------------------------------------------------
\&  euc-jp      /\ebeuc.*jp$/i     EUC (Extended Unix Character)
\&              /\ebjp.*euc/i   
\&              /\ebujis$/i
\&  shiftjis    /\ebshift.*jis$/i  Shift JIS (aka MS Kanji)
\&              /\ebsjis$/i
\&  7bit-jis    /\ebjis$/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       /\ebwindows-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
\&  --------------------------------------------------------------------
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
To find out how to use this module in detail, see Encode.
.SH "Note on ISO\-2022\-JP(\-1)?"
.IX Header "Note on ISO-2022-JP(-1)?"
\&\s-1ISO\-2022\-JP\-1\s0 (\s-1RFC2237\s0) is a superset of \s-1ISO\-2022\-JP\s0 (\s-1RFC1468\s0) which
adds support for \s-1JIS\s0 X 0212\-1990.  That means you can use the same
code to decode to utf8 but not vice versa.
.PP
.Vb 1
\&  $utf8 = decode('iso-2022-jp-1', $stream);
.Ve
.PP
and
.PP
.Vb 1
\&  $utf8 = decode('iso-2022-jp',   $stream);
.Ve
.PP
yield the same result but
.PP
.Vb 1
\&  $with_0212 = encode('iso-2022-jp-1', $utf8);
.Ve
.PP
is now different from
.PP
.Vb 1
\&  $without_0212 = encode('iso-2022-jp', $utf8 );
.Ve
.PP
In the latter case, characters that map to 0212 are first converted
to U+3013 (0xA2AE in \s-1EUC\-JP\s0; 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.
.SH "BUGS"
.IX Header "BUGS"
The \s-1ASCII\s0 region (0x00\-0x7f) is preserved for all encodings, even
though this conflicts with mappings by the Unicode Consortium.  See
.PP
<http://www.debian.or.jp/~kubota/unicode\-symbols.html.en>
.PP
to find out why it is implemented that way.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Encode
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