Encode::JP(3p) | Perl Programmers Reference Guide | Encode::JP(3p)

# 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                   JIS0208, raw format
      jis0212-raw                   JIS0212, 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

2023-02-15 | perl v5.40.1