Linux cli command Jcodepm

NAME 🖥️ Jcodepm 🖥️

Japanese Charset Handler

SYNOPSIS

use Jcode; # # traditional Jcode::convert(\str, $ocode, $icode, “z”); # or OOP! print Jcode->new($str)->h2z->tr($from, $to)->utf8;

DESCRIPTION

<Japanese document is now available as Jcode::Nihongo. >

Jcode.pm supports both object and traditional approach. With object approach, you can go like;

$iso_2022_jp = Jcode->new($str)->h2z->jis;

Which is more elegant than:

$iso_2022_jp = $str; &jcode::convert(\iso_2022_jp, jis, &jcode::getcode(\str), “z”);

For those unfamiliar with objects, Jcode.pm still supports getcode() and convert().

If the perl version is 5.8.1, Jcode acts as a wrapper to Encode, the standard charset handler module for Perl 5.8 or later.

Methods

Methods mentioned here all return Jcode object unless otherwise mentioned.

Constructors

$j = Jcode->new($str [, $icode])
Creates Jcode object $j from $str. Input code is automatically checked unless you explicitly set $icode. For available charset, see getcode below. For perl 5.8.1 or better, $icode can be any encoding name that Encode understands. $j = Jcode->new($european, iso-latin1); When the object is stringified, it returns the EUC-converted string so you can <print $j> instead of <print $j->euc>.

Passing Reference
Instead of scalar value, You can use reference as Jcode->new(\str); This saves time a little bit. In exchange of the value of $str being converted. (In a way, $str is now tied to jcode object).

$j->set($str [, $icode])
Sets $j’s internal string to $str. Handy when you use Jcode object repeatedly (saves time and memory to create object). # converts mailbox to SJIS format my $jconv = new Jcode; $/ = 00; while(<>){ print $jconv->set(\_)->mime_decode->sjis; }

$j->append($str [, $icode]);
Appends $str to $j’s internal string.

$j = jcode($str [, $icode]);
shortcut for Jcode->new() so you can go like;

Encoded Strings

In general, you can retrieve encoded string as $j->encoded.

$sjis = jcode($str)->sjis

$euc = $j->euc

$jis = $j->jis

$sjis = $j->sjis

$ucs2 = $j->ucs2

$utf8 = $j->utf8

What you code is what you get :)

$iso_2022_jp = $j->iso_2022_jp
Same as $j->h2z->jis. Hankaku Kanas are forcibly converted to Zenkaku. For perl 5.8.1 and better, you can also use any encoding names and aliases that Encode supports. For example: $european = $j->iso_latin1; # replace - with _ for names. FYI: Encode::Encoder uses similar trick.

$j->fallback($fallback)
For perl is 5.8.1 or better, Jcode stores the internal string in UTF-8. Any character that does not map to ->encoding are replaced with a ‘?’, which is Encode standard. my $unistr = “\x{262f}”; # YIN YANG my $j = jcode($unistr); # $j->euc is ? You can change this behavior by specifying fallback like Encode. Values are the same as Encode. Jcode::FB_PERLQQ, Jcode::FB_XMLCREF, Jcode::FB_HTMLCREF are aliased to those of Encode for convenice. print $j->fallback(Jcode::FB_PERLQQ)->euc; # \x{262f} print $j->fallback(Jcode::FB_XMLCREF)->euc; # ☯ print $j->fallback(Jcode::FB_HTMLCREF)->euc; # ☯ The global variable $Jcode::FALLBACK stores the default fallback so you can override that by assigning the value. $Jcode::FALLBACK = Jcode::FB_PERLQQ; # set default fallback scheme

[@lines =] $jcode->jfold([$width, $newline_str, $kref])
folds lines in jcode string every $width (default: 72) where $width is the number of halfwidth character. Fullwidth Characters are counted as two. with a newline string spefied by $newline_str (default: ). Rudimentary kinsoku suppport is now available for Perl 5.8.1 and better.

$length = $jcode->jlength();
returns character length properly, rather than byte length.

Methods that use MIME::Base64

To use methods below, you need MIME::Base64. To install, simply

perl -MCPAN -e CPAN::Shell->install(“MIME::Base64”)

If your perl is 5.6 or better, there is no need since MIME::Base64 is bundled.

$mime_header = $j->mime_encode([$lf, $bpl])
Converts $str to MIME-Header documented in RFC1522. When $lf is specified, it uses $lf to fold line (default: ). When $bpl is specified, it uses $bpl for the number of bytes (default: 76; this number must be smaller than 76). For Perl 5.8.1 or better, you can also encode MIME Header as: $mime_header = $j->MIME_Header; In which case the resulting $mime_header is MIME-B-encoded UTF-8 whereas $j->mime_encode() returnes MIME-B-encoded ISO-2022-JP. Most modern MUAs support both.

$j->mime_decode;
Decodes MIME-Header in Jcode object. For perl 5.8.1 or better, you can also do the same as: Jcode->new($str, MIME-Header)

Hankaku vs. Zenkaku

$j->h2z([$keep_dakuten])
Converts X201 kana (Hankaku) to X208 kana (Zenkaku). When $keep_dakuten is set, it leaves dakuten as is (That is, ka + dakuten is left as is instead of being converted to ga) You can retrieve the number of matches via $j->nmatch;

$j->z2h
Converts X208 kana (Zenkaku) to X201 kana (Hankaku). You can retrieve the number of matches via $j->nmatch;

Regexp emulators

To use ->m() and ->s(), you need perl 5.8.1 or better.

$j->tr($from, $to, $opt);
Applies tr/$from/$to/ on Jcode object where $from and $to are EUC-JP strings. On perl 5.8.1 or better, $from and $to can also be flagged UTF-8 strings. If $opt is set, tr/$from/$to/$opt is applied. $opt must be ‘c’, ’d’ or the combination thereof. You can retrieve the number of matches via $j->nmatch; The following methods are available only for perl 5.8.1 or better.

$j->s($patter, $replace, $opt);
Applies s/$pattern/$replace/$opt. $pattern and replace must be in EUC-JP or flagged UTF-8. $opt are the same as regexp options. See perlre for regexp options. Like $j->tr(), $j->s() returns the object itself so you can nest the operation as follows; $j->tr(“a-z”, “A-Z”)->s(“foo”, “bar”);

[@match = ] $j->m($pattern, $opt);
Applies m/$patter/$opt. Note that this method DOES NOT RETURN AN OBJECT so you can’t chain the method like $j->s().

Instance Variables

If you need to access instance variables of Jcode object, use access methods below instead of directly accessing them (That’s what OOP is all about)

FYI, Jcode uses a ref to array instead of ref to hash (common way) to optimize speed (Actually you don’t have to know as long as you use access methods instead; Once again, that’s OOP)

$j->r_str
Reference to the EUC-coded String.

$j->icode
Input charcode in recent operation.

$j->nmatch
Number of matches (Used in $j->tr, etc.)

Subroutines

($code, [$nmatch]) = getcode($str)
Returns char code of $str. Return codes are as follows ascii Ascii (Contains no Japanese Code) binary Binary (Not Text File) euc EUC-JP sjis SHIFT_JIS jis JIS (ISO-2022-JP) ucs2 UCS2 (Raw Unicode) utf8 UTF8 When array context is used instead of scaler, it also returns how many character codes are found. As mentioned above, $str can be \str instead. jcode.pl Users: This function is 100% upper-conpatible with jcode::getcode() Ω- well, almost; * When its return value is an array, the order is the opposite; jcode::getcode() returns $nmatch first. * jcode::getcode() returns undef when the number of EUC characters is equal to that of SJIS. Jcode::getcode() returns EUC. for Jcode.pm there is no in-betweens.

Jcode::convert($str, [$ocode, $icode, $opt])
Converts $str to char code specified by $ocode. When $icode is specified also, it assumes $icode for input string instead of the one checked by getcode(). As mentioned above, $str can be \str instead. jcode.pl Users: This function is 100% upper-conpatible with jcode::convert() !

BUGS

For perl is 5.8.1 or later, Jcode acts as a wrapper to Encode. Meaning Jcode is subject to bugs therein.

ACKNOWLEDGEMENTS

This package owes a lot in motivation, design, and code, to the jcode.pl for Perl4 by Kazumasa Utashiro <[email protected]>.

Hiroki Ohzaki <[email protected]> has helped me polish regexp from the very first stage of development.

JEncode by [email protected] has inspired me to integrate Encode to Jcode. He has also contributed Japanese POD.

And folks at Jcode Mailing list <[email protected]>. Without them, I couldn’t have coded this far.

SEE ALSO

Encode

Jcode::Nihongo

<http://www.iana.org/assignments/character-sets>

COPYRIGHT

Copyright 1999-2005 Dan Kogai <[email protected]>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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