[nkf/nkf.git] / NKF.mod / NKF.pm

## Copyright (C) 1996,1998
## Copyright (C) 2002
## Ï¢ÍíÀ衧 ΰµåÂç³Ø¾ðÊó¹©³Ø²Ê ²ÏÌî ¿¿¼£  mime/X0208 support
## ¡ÊE-Mail Address: kono@ie.u-ryukyu.ac.jp¡Ë
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package NKF;

use strict;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);

require Exporter;
require DynaLoader;

@ISA = qw(Exporter DynaLoader);
# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.
@EXPORT = qw(
        nkf     nkf_continue    inputcode
);
$VERSION = '2.05';

bootstrap NKF $VERSION;

# Preloaded methods go here.

# Autoload methods go after =cut, and are processed by the autosplit program.

1;
__END__
# Below is the stub of documentation for your module. You better edit it!

=head1 NAME

NKF - Perl extension for Network Kanji Filter 

=head1 SYNOPSIS

  use NKF;
  $output = nkf("-s",$input);

=head1 DESCRIPTION

This is a Perl Extension version of nkf (Netowrk Kanji Filter).
It converts the last argument and return converted result. Conversion
details are specified by flags before the last argument.


B<Nkf> is a yet another kanji code converter among networks, hosts and terminals.
It converts input kanji code to designated kanji code
such as ISO-2022-JP, Shift_JIS, EUC-JP, UTF-8 or UTF-16.

One of the most unique faculty of B<nkf> is the guess of the input kanji encodings.
It currently recognizes ISO-2022-JP, Shift_JIS, EUC-JP, UTF-8 and UTF-16.
So users needn't set the input kanji code explicitly.

By default, X0201 kana is converted into X0208 kana.
For X0201 kana, SO/SI, SSO and ESC-(-I methods are supported.
For automatic code detection, nkf assumes no X0201 kana in Shift_JIS.
To accept X0201 in Shift_JIS, use B<-X>, B<-x> or B<-S>.

=head1 Flags

=over

=item B<-b -u>

Output is buffered (DEFAULT), Output is unbuffered.

=item B<-j -s -e -w -w16>

Output code is ISO-2022-JP (7bit JIS), Shift_JIS, EUC-JP,
UTF-8N, UTF-16BE.
Without this option and compile option, ISO-2022-JP is assumed.

=item B<-J -S -E -W -W16>

Input assumption is JIS 7 bit, Shift_JIS, EUC-JP,
UTF-8, UTF-16LE.

=over

=item B<-J>

Assume  JIS input. It also accepts EUC-JP.
This is the default. This flag does not exclude Shift_JIS.

=item B<-S>

Assume Shift_JIS and X0201 kana input. It also accepts JIS.
EUC-JP is recognized as X0201 kana. Without B<-x> flag,
X0201 kana (halfwidth kana) is converted into X0208.

=item B<-E>

Assume EUC-JP input. It also accepts JIS.
Same as -J.

=back

=item B<-t>

No conversion.

=item B<-i_>

Output sequence to designate JIS-kanji. (DEFAULT B)

=item B<-o_>

Output sequence to designate ASCII. (DEFAULT B)

=item B<-r>

{de/en}crypt ROT13/47

=item B<-h[123] --hiragana --katakana --katakana-hiragana>

=over

=item B<-h1 --hiragana>

Katakana to Hiragana conversion.

=item B<-h2 --katakana>

Hiragana to Katakana conversion.

=item B<-h3 --katakana-hiragana>

Katakana to Hiragana and Hiragana to Katakana conversion.

=back

=item B<-T>

Text mode output (MS-DOS)

=item B<-l>

ISO8859-1 (Latin-1) support

=item B<-f[I<m> [- I<n>]]>

Folding on I<m> length with I<n> margin in a line.
Without this option, fold length is 60 and fold margin is 10.

=item B<-F>

New line preserving line folding.

=item B<-Z[0-3]>

Convert X0208 alphabet (Fullwidth Alphabets) to ASCII.

=over

=item B<-Z -Z0>

Convert X0208 alphabet to ASCII.

=item B<-Z1>

Converts X0208 kankaku to single ASCII space.

=item B<-Z2>

Converts X0208 kankaku to double ASCII spaces.

=item B<-Z3>

Replacing Fullwidth >, <, ", & into '&gt;', '&lt;', '&quot;', '&amp;' as in HTML.

=back

=item B<-X -x>

Assume X0201 kana in MS-Kanji.
With B<-X> or without this option, X0201 is converted into X0208 Kana.
With B<-x>, try to preserve X0208 kana and do not convert X0201 kana to X0208.
In JIS output, ESC-(-I is used. In EUC output, SSO is used.

=item B<-B[0-2]>

Assume broken JIS-Kanji input, which lost ESC.
Useful when your site is using old B-News Nihongo patch.

=over

=item B<-B1>

allows any char after ESC-( or ESC-$.

=item B<-B2>

forces ASCII after NL.

=back

=item B<-I>

Replacing non iso-2022-jp char into a geta character
(substitute character in Japanese).

=item B<-d -c>

Delete \r in line feed, Add \r in line feed.

=item B<-m[BQN0]>

MIME ISO-2022-JP/ISO8859-1 decode. (DEFAULT)
To see ISO8859-1 (Latin-1) -l is necessary.

=over

=item B<-mB>

Decode MIME base64 encoded stream. Remove header or other part before
conversion. 

=item B<-mQ>

Decode MIME quoted stream. '_' in quoted stream is converted to space.

=item B<-mN>

Non-strict decoding.
It allows line break in the middle of the base64 encoding.

=item B<-m0>

No MIME decode.

=back

=item B<-M>

MIME encode. Header style. All ASCII code and control characters are intact.

=over

=item B<-MB>

MIME encode Base64 stream.
Kanji conversion is performed before encoding, so this cannot be used as a picture encoder.

=item B<-MQ>

Perfome quoted encoding.

=back

=item B<-l>

Input and output code is ISO8859-1 (Latin-1) and ISO-2022-JP.
B<-s>, B<-e> and B<-x> are not compatible with this option.

=item B<-L[uwm]>

new line mode

=over

=item B<-Lu>

unix (LF)

=item B<-Lw>

windows (CRLF)

=item B<-Lm>

mac (CR)

Without this option, nkf doesn't convert line breaks.

=back

=item B<--fj --unix --mac --msdos --windows>

convert for these system

=item B<--jis --euc --sjis --mime --base64>

convert for named code

=item B<--jis-input --euc-input --sjis-input --mime-input --base64-input>

assume input system

=item B<--ic=I<input codeset> --oc=I<output codeset>>

Set the input or output codeset.
NKF supports following codesets and those codeset name are case insensitive.

=over

=item ISO-2022-JP

a.k.a. RFC1468, 7bit JIS, JUNET

=item EUC-JP (eucJP-nkf)

a.k.a. AT&T JIS, Japanese EUC, UJIS

=item eucJP-ascii

=item eucJP-ms

=item CP51932

Microsoft Version of EUC-JP.

=item Shift_JIS

a.k.a. SJIS, MS-Kanji

=item CP932

a.k.a. Windows-31J

=item UTF-8

same as UTF-8N

=item UTF-8N

UTF-8 without BOM

=item UTF-8-BOM

UTF-8 with BOM

=item UTF-16

same as UTF-16BE

=item UTF-16BE

UTF-16 Big Endian without BOM

=item UTF-16BE-BOM

UTF-16 Big Endian with BOM

=item UTF-16LE

UTF-16 Little Endian without BOM

=item UTF-16LE-BOM

UTF-16 Little Endian with BOM

=item UTF8-MAC (input only)

=back

=item B<--fb-{skip, html, xml, perl, java, subchar}>

Specify the way that nkf handles unassigned characters.
Without this option, --fb-skip is assumed.

=item B<--prefix=I<escape character>I<target character>..>

When nkf converts to Shift_JIS,
nkf adds a specified escape character to specified 2nd byte of Shift_JIS characters.
1st byte of argument is the escape character and following bytes are target characters.

=item B<--no-cp932ext>

Handle the characters extended in CP932 as unassigned characters.

=item B<--no-best-fit-chars>

When Unicode to Encoded byte conversion,
don't convert characters which is not round trip safe.
When Unicode to Unicode conversion,
with this and -x option, nkf can be used as UTF converter.
(In other words, without this and -x option, nkf doesn't save some characters)

When nkf convert string which related to path, you should use this opion.

=item B<--cap-input>

Decode hex encoded characters.

=item B<--url-input>

Unescape percent escaped characters.

=item B<--numchar-input>

Decode character reference, such as "&#....;".

=begin man

=item B<--overwrite>

Overwrite original file by converted result.

=item B<--guess>

Print guessed encoding.

=end man

=item B<-->

Ignore rest of -option.

=back

=head1 AUTHOR

Network Kanji Filter Version 2.0.5

Copyright (C) 1987, FUJITSU LTD. (I.Ichikawa),2000 S. Kono, COW, 2002-2005 Kono, Furukawa, Naruse

=head1 SEE ALSO

perl(1).   nkf(1)

=cut