M17N/Code/JA.pm


package M17N::Code::JA;
use strict;
use vars qw(%re %internalo);

%re = (
  94x1  => qr/\x1B\x28([\x40-\x7D])((?:[\x21-\x7E])*)/,
  94x2  => qr/(?:\x1B\x26([\x40-\x7E]))?\x1B\x24\x28?([\x40-\x5F])((?:[\x21-\x7E][\x21-\x7E])*)/,
  96x1  => qr/\x1B\x2C([\x40-\x7D])((?:[\x20-\x7F])*)/,
  utf8  => qr/\x1B\x25(?:\x47|\x2F[\x47-\x49])((?:[\x20-\x7F]|(?:[\xC0-\xFD][\x80-\xBF]+))*)\x1B\x25\x40/,
);
%internalo = (
  94x1  => 0xE90940,
  94x2  => 0xE9F6C0,
  96x1  => 0xE926A0,
  jisx02081990  => 0xE9F6C0 + 94*94*79,
);
%internalo = (%internalo,
  jisx0201kana  => $internalo{94x1} + 94 * (0x49-0x30),
  jisx0201kana_end      => $internalo{94x1} + 94 * (0x49-0x30+1) -1,
  jisx0201latin => $internalo{94x1} + 94 * (0x4A-0x30),
  jisx0201latin_end     => $internalo{94x1} + 94 * (0x4A-0x30+1) -1,
  jisx02081978  => $internalo{94x2} + 94*94 * (0x40-0x30),
  jisx02081978_end      => $internalo{94x2} + 94*94 * (0x40-0x30+1) -1,
  jisx02081983  => $internalo{94x2} + 94*94 * (0x42-0x30),
  jisx02081983_end      => $internalo{94x2} + 94*94 * (0x42-0x30+1) -1,
  jisx02081990_end      => $internalo{jisx02081990} + 94*94 -1,
  jisx02121990  => $internalo{94x2} + 94*94 * (0x44-0x30),
  jisx02121990_end      => $internalo{94x2} + 94*94 * (0x44-0x30+1) -1,
  jisx02132000_1        => $internalo{94x2} + 94*94 * (0x4F-0x30),
  jisx02132000_1_end    => $internalo{94x2} + 94*94 * (0x4F-0x30+1) -1,
  jisx02132000_2        => $internalo{94x2} + 94*94 * (0x50-0x30),
  jisx02132000_2_end    => $internalo{94x2} + 94*94 * (0x50-0x30+1) -1,
);

my %_charset_name_n11n_table = (
  euc   => "euc-jp",
  "euc-japan"   => "euc-jp",
  "euc-jisx0208"        => "euc-jp",
  "euc-jisx0213"        => "euc-jp:2000",
  jis   => "junet",
  "shift-jis"   => "shift_jis",
  "shift-jisx0213"      => "shift_jis:2000",
  shift_jisx0213        => "shift_jis:2000",
  sjis  => "shift_jis",
  "x-euc-jisx0213"      => "euc-jp:2000",
  "x-euc-jp"    => "euc-jp",
  "x-shift_jisx0213"    => "shift_jis:2000",
  "x-sjis"      => "shift_jis",
);
sub _charset_name_n11n ($;$) {
  my $name = lc shift;  my $year = shift;
  $name = $_charset_name_n11n_table{$name} || $name;
  if ($name =~ /^(.+):(\d+)$/) {
    $name = $1;
    $year ||= $2;
  }
  ($name, $year);
}

=head2 convert ($string, $output_code, $input_code, $options)

Convert coded charset of string.

=cut

sub convert ($;$$$) {
  my ($string, $output_code, $input_code, $options) = @_;
  $string = \$string unless ref $string;
  my ($input_edition, $output_edition);
  ($input_code, $input_edition) = _charset_name_n11n ($input_code);
  ($output_code, $output_edition) = _charset_name_n11n ($output_code || "junet");
  if ($input_code eq "euc-jp") {
    eucjapan_to_internal ($string, edition => $input_edition);
  } elsif ($input_code eq "junet" || $input_code =~ /^iso-2022-jp/) {
    junet_to_internal ($string);
  }
  
  if ($output_code eq "euc-jp") {
    internal_to_eucjapan ($string, edition => $output_edition);
  } elsif ($output_code eq "junet" || $output_code =~ /^iso-2022-jp/) {
    internal_to_junet ($string);
  }
}

=head2 junet_to_internal ($string)

Convert junet coded string to internal coded string.

=cut

sub junet_to_internal ($) {
  my $s = shift;
  $s = \$s unless ref $s;
  $$s =~ s{
    ($re{94x1} | $re{94x2} | $re{96x1} | $re{utf8})
  }{
    my $st = $1;
    if ($st =~ /$re{94x1}/) {
      my ($f, $str) = ($1, $2);
      $f = unpack 'C', $f;
      $f = $f == 0x42 ? 0x21 : $internalo{94x1} + 94 * ($f - 0x30);
      $str =~ s{([\x21-\x7E])}{
        _u8($f + unpack('C', $1) - 0x21);
      }goesx;
      $st = $str;
    } elsif ($st =~ /$re{94x2}/) {
      my ($rev, $f, $str) = ($1, $2, $3);
      if ($rev eq '@' && $f eq 'B') {
        $f = $internalo{jisx02081990};
      } else {
        $f = unpack 'C', $f;
        $f = $internalo{94x2} + 94*94 * ($f - 0x30);
      }
      $str =~ s{([\x21-\x7E])([\x21-\x7E])}{
        _u8($f + (unpack('C', $1) - 0x21)*94 + unpack('C', $2) - 0x21);
      }goesx;
      $st = $str;
    } elsif ($st =~ /$re{96x1}/) {
      my ($f, $str) = ($1, $2);
      $f = unpack 'C', $f;
      $f = $f == 0x41 ? 0xA0 : $internalo{96x1} + 96 * ($f - 0x30);
      $str =~ s{([\x20-\x7F])}{
        _u8($f + unpack('C', $1) - 0x20);
      }goesx;
      $st = $str;
    } elsif ($st =~ /$re{utf8}/) {
      $st = $1;
    }
    $st;
  }goesx;
  $$s;
}

sub _u8 ($) {
  my ($ret, $uc);
  $uc = shift;
    if ($uc < 0x80) {   ## 1 byte
      $ret .= chr($uc);
    } elsif ($uc < 0x800) {     ## 2 byte
      $ret .= chr(0xC0 | ($uc >> 6))
           .  chr(0x80 | ($uc & 0x3F));
    } elsif ($uc < 0x10000) {   ## 3 byte
      $ret .= chr(0xE0 |  ($uc >> 12)        )
           .  chr(0x80 | (($uc >>  6) & 0x3F))
           .  chr(0x80 |  ($uc & 0x3F)       );
    } elsif ($uc < 0x200000) {  ## 4 byte
      $ret .= chr( 240 |  ($uc >> 18)        )
           .  chr(0x80 | (($uc >> 12) & 0x3F))
           .  chr(0x80 | (($uc >>  6) & 0x3F))
           .  chr(0x80 |  ($uc & 0x3F)       );
    } elsif ($uc < 0x4000000) { ## 5 byte
      $ret .= chr( 248 |  ($uc >> 24)        )
           .  chr(0x80 | (($uc >> 18) & 0x3F))
           .  chr(0x80 | (($uc >> 12) & 0x3F))
           .  chr(0x80 | (($uc >>  6) & 0x3F))
           .  chr(0x80 |  ($uc & 0x3F)       );
    } elsif ($uc < 0x80000000) {        ## 6 byte
      $ret .= chr( 252 |  ($uc >> 30)        )
           .  chr(0x80 | (($uc >> 24) & 0x3F))
           .  chr(0x80 | (($uc >> 18) & 0x3F))
           .  chr(0x80 | (($uc >> 12) & 0x3F))
           .  chr(0x80 | (($uc >>  6) & 0x3F))
           .  chr(0x80 |  ($uc & 0x3F)       );
    }
  $ret;
}

sub _ucode ($) {
  my $s = shift;
  return unpack("C", $s) if length($s) < 2;
  my ($iterations, $c, @c)
    = (0, unpack("C", substr($s, 0, 1)), unpack('C*', substr($s, 1)));
  if (($c & 0xFE) == 0xFC) {
      $c = ($c & 0x01);
      $iterations = 5;
  } elsif (($c & 0xFC) == 0xF8) {
      $c = ($c & 0x03);
      $iterations = 4;
  } elsif (($c & 0xF8) == 0xF0) {
      $c = ($c & 0x07);
      $iterations = 3;
  } elsif (($c & 0xF0) == 0xE0) {
      $c = ($c & 0x0F);
      $iterations = 2;
  } elsif (($c & 0xE0) == 0xC0) {
      $c = ($c & 0x1F);
      $iterations = 1;
  }
  if ($iterations == $#c+1) {
      for (my $i = 0; $i < $iterations; $i++) {
        $c = ($c << 6);
        $c = ($c | ($c[$i] & 0x3F));
      }
  }
  $c;
}

=head2 internal_to_eucjapan ($string, [%options])

Convert internal coded string to euc-japan coded string.

=head3 Example

internal_to_eucjapan (\$s, jisx0201kana => 1);

=cut

sub internal_to_eucjapan ($;%) {
  my $s = shift;
  $s = \$s unless ref $s;
  my %output = @_;
  my $year = $output{edition} || -1;    ## -1 (= all unify), 1983, 1990 = 1997, 2000
  $output{jisx02081978} = 1 if $year < 1983;
  $output{jisx02081983} = 1 if $year == -1 || (1983 <= $year && $year < 1990);
  $output{jisx02081990} = 1 if $year == -1 || (1990 <= $year && $year < 2000);
  $output{jisx02121990} = 1 if $year == -1 || (1990 <= $year && $year < 2000);
  $output{jisx02132000_1} = 1 if $year == -1 || (2000 <= $year);
  $output{jisx02132000_2} = 1 if $year == -1 || (2000 <= $year);
  $output{undefchar} ||= "\xA2\xAE";
  $$s =~ s{([\xC0-\xFF][\x80-\xBF]*)}{
    my $char = $1;  my $code = _ucode($char);  my $ret = "";
    if ($code < 0x7F) { ## G0 = ASCII
      $ret = pack("C", $code);
    } elsif ($output{jisx0201latin} && $internalo{jisx0201latin} < $code 
      && $code < $internalo{jisx0201latin_end}) {       ## G0 = JIS X 0201 latin
      $ret = pack("C", $code - $internalo{jisx0201latin} + 0x21);
    } elsif ($output{jisx02081978} 
      && ($internalo{jisx02081978} < $code && $code < $internalo{jisx02081978_end})
      ) {       ## G1 = JIS X 0208-1978
      my $ku = $code - $internalo{jisx02081978};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = pack("CC", $ku, $ten);
    } elsif ($output{jisx02081983} 
      && ($internalo{jisx02081983} < $code && $code < $internalo{jisx02081983_end})
      ) {       ## G1 = JIS X 0208-1983
      my $ku = $code - $internalo{jisx02081983};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = pack("CC", $ku, $ten);
    } elsif ($output{jisx02081990} 
      && ($internalo{jisx02081990} < $code && $code < $internalo{jisx02081990_end})
      ) {       ## G1 = JIS X 0208-1990 / JIS X 0208:1997
      my $ku = $code - $internalo{jisx02081990};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = pack("CC", $ku, $ten);
    } elsif ($output{jisx02132000_1} 
    && ($internalo{jisx02132000_1} < $code && $code < $internalo{jisx02132000_1_end})
      ) {       ## G1 = JIS X 0213:2000 plane 1
      my $ku = $code - $internalo{jisx02132000_1};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = pack("CC", $ku, $ten);
    } elsif ($output{jisx0201kana} && $internalo{jisx0201kana} < $code 
      && $code < $internalo{jisx0201kana_end}) {        ## G2 = JIS X 0201 katakana
      $ret = "\x8E" . pack("C", $code - $internalo{jisx0201kana} + 0xA1);
    } elsif ($output{jisx02121990} 
    && ($internalo{jisx02121990} < $code && $code < $internalo{jisx02121990_end})
      ) {       ## G3 = JIS X 0213:2000 plane 2
      my $ku = $code - $internalo{jisx02121990};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = "\x8F" . pack("CC", $ku, $ten);
    } elsif ($output{jisx02132000_2} 
    && ($internalo{jisx02132000_2} < $code && $code < $internalo{jisx02132000_2_end})
      ) {       ## G3 = JIS X 0213:2000 plane 2
      my $ku = $code - $internalo{jisx02132000_2};
      my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
      $ret = "\x8F" . pack("CC", $ku, $ten);
    } else {
      $ret = $output{undefchar};
    }
    $ret;
  }goex;
  $$s;
}

=head2 internal_to_junet ($sering, [%option])

Convert internal coded string to junet coded string.

=head3 options

* g0_96
* utf8

=cut

sub internal_to_junet ($;%) {
  my $s = shift;
  $s = \$s unless ref $s;
  my %output = @_;  my $mode = "\x1B\x28\x42";
  $output{undefchar} ||= 0x3F-0x21;
  $output{undefcharset} ||= "\x1B\x28\x42";
  $$s =~ s{([\x00-\x7F]|(?:[\xC0-\xFF][\x80-\xBF]*))}{
    my $char = $1;  my $code = _ucode($char);  my $ret = "";
    if ($code < 0x9F) { ## ASCII
      $ret = _2022_putchar(\$mode => "\x1B\x28\x42", $code-0x21);
    } elsif ($code < 0xFF) {    ## ISO 8859-1 right half
      $ret = _2022_putchar(\$mode => "\x1B\x2C\x41", $code-0xA0);
    } elsif ($internalo{94x1} < $code && $code < $internalo{94x1} + 94*78 -1) {
        ## 94 charsets
      my $final = pack("C", int(($code - $internalo{94x1}) / 94) + 0x30);
      $ret = _2022_putchar(\$mode => "\x1B\x28".$final,
                           ($code - $internalo{94x1}) % 94);
    } elsif ($output{g0_96}
      && $internalo{96x1} < $code && $code < $internalo{96x1} + 96*78 -1) {
        ## 96 charsets
      my $final = pack("C", int(($code - $internalo{96x1}) / 96) + 0x30);
      $ret = _2022_putchar(\$mode => "\x1B\x2C".$final,
                           ($code - $internalo{96x1}) % 96);
    } elsif ($internalo{94x2} < $code && $code < $internalo{94x2} + 94*94*78 -1) {
        ## 94x2 charsets
      my $final = pack("C", int(($code - $internalo{94x2}) / (94*94)) + 0x30);
      $ret = _2022_putchar(\$mode => "\x1B\x24\x28".$final,
                           ($code - $internalo{94x2}) % (94*94));
    } elsif ($internalo{jisx02081990} < $code
          && $code < $internalo{jisx02081990} + 94*94 -1) {
      $ret = _2022_putchar(\$mode => "\x1B\x26\x40\x1B\x24B",
                           ($code - $internalo{94x2}) % (94*94));
    } elsif ($output{utf8}) {
      $ret = _2022_putchar(\$mode => "\x1B\x25G", $char)
    } else {
      $ret = _2022_putchar(\$mode => $output{undefcharset} => $output{undefchar});
    }
    $ret;
  }goesx;
  $$s;
}
sub _2022_putchar ($$$) {
  my ($mode, $newmode, $char) = @_;
  my $ret = "";  my %is;
  $is{multibyte} = 1 if $newmode =~ /\x24/;
  $is{set96} = 1 if $newmode =~ /\x2C/;
  if ($$mode ne $newmode) {
    if ($$mode eq "\x1B\x25G") {
      $ret = "\x1B\x25\x40\x1B\x28\x42";
    }
    if ($is{multibyte} || $is{set96} || $newmode eq "\x1B\x25G") {
      $ret .= "\x1B\x28\x42";
    }
    if ($newmode =~ /\x1B\x24\x28([\x40-\x42])/) {
      $ret .= "\x1B\x24$1";
    } else {
      $ret .= $newmode;
    }
    $$mode = $newmode;
  }
  if ($is{multibyte} && $is{set96}) {   ## 96x2
    $ret .= pack("CC", int($char / 96) + 0x20, ($char % 96) + 0x20);
  } elsif ($is{multibyte}) {    ## 94x2
    $ret .= pack("CC", int($char / 94) + 0x21, ($char % 94) + 0x21);
  } elsif ($is{set96}) {        ## 96x1
    $ret .= pack("C", $char + 0x20);
  } elsif ($newmode eq "\x1B\x25G") {   ## utf-8
    $ret .= $char;      ## if utf-8, $char is char itself!
  } else {      ## 94x1
    $ret .= pack("C", $char + 0x21);
  }
  $ret;
}

sub eucjapan_to_internal ($;%) {
  my $s = shift;
  $s = \$s unless ref $s;
  my %option = @_;
  my $year = $option{edition} || 2000;  ## 1978, 1983, 1990=1997, 2000
  $option{G0start} ||= 0x21;  $option{G2start} ||= $internalo{jisx0201kana};
  if ($option{G1start} && $option{G3start}) {}
  elsif ($year < 1983)
    {$option{G1start} ||= $internalo{jisx02081978}; $option{G3start} ||= -1}
  elsif (1983 <= $year && $year < 1990)
    {$option{G1start} ||= $internalo{jisx02081983}; $option{G3start} ||= -1}
  elsif (1990 <= $year && $year < 2000)
    {$option{G1start} ||= $internalo{jisx02081990}; $option{G3start} ||= -1}
  else #elsif (2000 <= $year)
    {$option{G1start} ||= $internalo{jisx02132000_1}; $option{G3start} ||= -1}
  $$s =~ s{([\x21-\x7E]|\x8E[\xA1-\xFE]|\x8F?[\xA1-\xFE][\xA1-\xFE])}{
    my $char = $1;  my $ret = "";
    if ($char =~ /[\x21-\x7E]/) {
      $ret = _u8(unpack("C", $char) - 0x21 + $option{G0start});
    } elsif ($char =~ /\x8F/) {
      my $ku = unpack("C", substr($char,1,1)) - 0xA1;
      my $ten = unpack("C", substr($char,2,1)) - 0xA1;
      if ($option{G3start} == -1) {
        if (77 <= $ku || $ku == 0 || $ku == 2 || $ku == 3 || $ku == 4
          || $ku == 7 || $ku == 11 || $ku == 12 || $ku == 13 || $ku == 14) {
          $ret = _u8($ku * 94 + $ten + $internalo{jisx02132000_2});
        } else {
          $ret = _u8($ku * 94 + $ten + $internalo{jisx02121990});
        }
      } else {
        $ret = _u8($ku * 94 + $ten + $option{G3start});
      }
    } elsif ($char =~ /\x8E/) {
      $ret = _u8(unpack("C", substr($char,1,1)) - 0xA1 + $option{G2start});
    } else {
      my $ku = unpack("C", substr($char,0,1)) - 0xA1;
      my $ten = unpack("C", substr($char,1,1)) - 0xA1;
      $ret = _u8($ku * 94 + $ten + $option{G1start});
    }
    $ret;
  }goex;
}

=head1 NAME

M17N::Code::JA --- Japanese string coding system convertion

=head1 LICENSE

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

=head1 AUTHOR

wakaba <wakaba@suika.fam.cx>

=cut

1;
1
2	package M17N::Code::JA;
3	use strict;
4	use vars qw(%re %internalo);
5
6	%re = (
7	94x1 => qr/\x1B\x28([\x40-\x7D])((?:[\x21-\x7E])*)/,
8	94x2 => qr/(?:\x1B\x26([\x40-\x7E]))?\x1B\x24\x28?([\x40-\x5F])((?:[\x21-\x7E][\x21-\x7E])*)/,
9	96x1 => qr/\x1B\x2C([\x40-\x7D])((?:[\x20-\x7F])*)/,
10	utf8 => qr/\x1B\x25(?:\x47\|\x2F[\x47-\x49])((?:[\x20-\x7F]\|(?:[\xC0-\xFD][\x80-\xBF]+))*)\x1B\x25\x40/,
11	);
12	%internalo = (
13	94x1 => 0xE90940,
14	94x2 => 0xE9F6C0,
15	96x1 => 0xE926A0,
16	jisx02081990 => 0xE9F6C0 + 949479,
17	);
18	%internalo = (%internalo,
19	jisx0201kana => $internalo{94x1} + 94 * (0x49-0x30),
20	jisx0201kana_end => $internalo{94x1} + 94 * (0x49-0x30+1) -1,
21	jisx0201latin => $internalo{94x1} + 94 * (0x4A-0x30),
22	jisx0201latin_end => $internalo{94x1} + 94 * (0x4A-0x30+1) -1,
23	jisx02081978 => $internalo{94x2} + 9494 (0x40-0x30),
24	jisx02081978_end => $internalo{94x2} + 9494 (0x40-0x30+1) -1,
25	jisx02081983 => $internalo{94x2} + 9494 (0x42-0x30),
26	jisx02081983_end => $internalo{94x2} + 9494 (0x42-0x30+1) -1,
27	jisx02081990_end => $internalo{jisx02081990} + 94*94 -1,
28	jisx02121990 => $internalo{94x2} + 9494 (0x44-0x30),
29	jisx02121990_end => $internalo{94x2} + 9494 (0x44-0x30+1) -1,
30	jisx02132000_1 => $internalo{94x2} + 9494 (0x4F-0x30),
31	jisx02132000_1_end => $internalo{94x2} + 9494 (0x4F-0x30+1) -1,
32	jisx02132000_2 => $internalo{94x2} + 9494 (0x50-0x30),
33	jisx02132000_2_end => $internalo{94x2} + 9494 (0x50-0x30+1) -1,
34	);
35
36	my %_charset_name_n11n_table = (
37	euc => "euc-jp",
38	"euc-japan" => "euc-jp",
39	"euc-jisx0208" => "euc-jp",
40	"euc-jisx0213" => "euc-jp:2000",
41	jis => "junet",
42	"shift-jis" => "shift_jis",
43	"shift-jisx0213" => "shift_jis:2000",
44	shift_jisx0213 => "shift_jis:2000",
45	sjis => "shift_jis",
46	"x-euc-jisx0213" => "euc-jp:2000",
47	"x-euc-jp" => "euc-jp",
48	"x-shift_jisx0213" => "shift_jis:2000",
49	"x-sjis" => "shift_jis",
50	);
51	sub _charset_name_n11n ($;$) {
52	my $name = lc shift; my $year = shift;
53	$name = $_charset_name_n11n_table{$name} \|\| $name;
54	if ($name =~ /^(.+):(\d+)$/) {
55	$name = $1;
56	$year \|\|= $2;
57	}
58	($name, $year);
59	}
60
61	=head2 convert ($string, $output_code, $input_code, $options)
62
63	Convert coded charset of string.
64
65	=cut
66
67	sub convert ($;$$$) {
68	my ($string, $output_code, $input_code, $options) = @_;
69	$string = \$string unless ref $string;
70	my ($input_edition, $output_edition);
71	($input_code, $input_edition) = _charset_name_n11n ($input_code);
72	($output_code, $output_edition) = _charset_name_n11n ($output_code \|\| "junet");
73	if ($input_code eq "euc-jp") {
74	eucjapan_to_internal ($string, edition => $input_edition);
75	} elsif ($input_code eq "junet" \|\| $input_code =~ /^iso-2022-jp/) {
76	junet_to_internal ($string);
77	}
78
79	if ($output_code eq "euc-jp") {
80	internal_to_eucjapan ($string, edition => $output_edition);
81	} elsif ($output_code eq "junet" \|\| $output_code =~ /^iso-2022-jp/) {
82	internal_to_junet ($string);
83	}
84	}
85
86	=head2 junet_to_internal ($string)
87
88	Convert junet coded string to internal coded string.
89
90	=cut
91
92	sub junet_to_internal ($) {
93	my $s = shift;
94	$s = \$s unless ref $s;
95	$$s =~ s{
96	($re{94x1} \| $re{94x2} \| $re{96x1} \| $re{utf8})
97	}{
98	my $st = $1;
99	if ($st =~ /$re{94x1}/) {
100	my ($f, $str) = ($1, $2);
101	$f = unpack 'C', $f;
102	$f = $f == 0x42 ? 0x21 : $internalo{94x1} + 94 * ($f - 0x30);
103	$str =~ s{([\x21-\x7E])}{
104	_u8($f + unpack('C', $1) - 0x21);
105	}goesx;
106	$st = $str;
107	} elsif ($st =~ /$re{94x2}/) {
108	my ($rev, $f, $str) = ($1, $2, $3);
109	if ($rev eq '@' && $f eq 'B') {
110	$f = $internalo{jisx02081990};
111	} else {
112	$f = unpack 'C', $f;
113	$f = $internalo{94x2} + 9494 ($f - 0x30);
114	}
115	$str =~ s{([\x21-\x7E])([\x21-\x7E])}{
116	_u8($f + (unpack('C', $1) - 0x21)*94 + unpack('C', $2) - 0x21);
117	}goesx;
118	$st = $str;
119	} elsif ($st =~ /$re{96x1}/) {
120	my ($f, $str) = ($1, $2);
121	$f = unpack 'C', $f;
122	$f = $f == 0x41 ? 0xA0 : $internalo{96x1} + 96 * ($f - 0x30);
123	$str =~ s{([\x20-\x7F])}{
124	_u8($f + unpack('C', $1) - 0x20);
125	}goesx;
126	$st = $str;
127	} elsif ($st =~ /$re{utf8}/) {
128	$st = $1;
129	}
130	$st;
131	}goesx;
132	$$s;
133	}
134
135	sub _u8 ($) {
136	my ($ret, $uc);
137	$uc = shift;
138	if ($uc < 0x80) { ## 1 byte
139	$ret .= chr($uc);
140	} elsif ($uc < 0x800) { ## 2 byte
141	$ret .= chr(0xC0 \| ($uc >> 6))
142	. chr(0x80 \| ($uc & 0x3F));
143	} elsif ($uc < 0x10000) { ## 3 byte
144	$ret .= chr(0xE0 \| ($uc >> 12) )
145	. chr(0x80 \| (($uc >> 6) & 0x3F))
146	. chr(0x80 \| ($uc & 0x3F) );
147	} elsif ($uc < 0x200000) { ## 4 byte
148	$ret .= chr( 240 \| ($uc >> 18) )
149	. chr(0x80 \| (($uc >> 12) & 0x3F))
150	. chr(0x80 \| (($uc >> 6) & 0x3F))
151	. chr(0x80 \| ($uc & 0x3F) );
152	} elsif ($uc < 0x4000000) { ## 5 byte
153	$ret .= chr( 248 \| ($uc >> 24) )
154	. chr(0x80 \| (($uc >> 18) & 0x3F))
155	. chr(0x80 \| (($uc >> 12) & 0x3F))
156	. chr(0x80 \| (($uc >> 6) & 0x3F))
157	. chr(0x80 \| ($uc & 0x3F) );
158	} elsif ($uc < 0x80000000) { ## 6 byte
159	$ret .= chr( 252 \| ($uc >> 30) )
160	. chr(0x80 \| (($uc >> 24) & 0x3F))
161	. chr(0x80 \| (($uc >> 18) & 0x3F))
162	. chr(0x80 \| (($uc >> 12) & 0x3F))
163	. chr(0x80 \| (($uc >> 6) & 0x3F))
164	. chr(0x80 \| ($uc & 0x3F) );
165	}
166	$ret;
167	}
168
169	sub _ucode ($) {
170	my $s = shift;
171	return unpack("C", $s) if length($s) < 2;
172	my ($iterations, $c, @c)
173	= (0, unpack("C", substr($s, 0, 1)), unpack('C*', substr($s, 1)));
174	if (($c & 0xFE) == 0xFC) {
175	$c = ($c & 0x01);
176	$iterations = 5;
177	} elsif (($c & 0xFC) == 0xF8) {
178	$c = ($c & 0x03);
179	$iterations = 4;
180	} elsif (($c & 0xF8) == 0xF0) {
181	$c = ($c & 0x07);
182	$iterations = 3;
183	} elsif (($c & 0xF0) == 0xE0) {
184	$c = ($c & 0x0F);
185	$iterations = 2;
186	} elsif (($c & 0xE0) == 0xC0) {
187	$c = ($c & 0x1F);
188	$iterations = 1;
189	}
190	if ($iterations == $#c+1) {
191	for (my $i = 0; $i < $iterations; $i++) {
192	$c = ($c << 6);
193	$c = ($c \| ($c[$i] & 0x3F));
194	}
195	}
196	$c;
197	}
198
199	=head2 internal_to_eucjapan ($string, [%options])
200
201	Convert internal coded string to euc-japan coded string.
202
203	=head3 Example
204
205	internal_to_eucjapan (\$s, jisx0201kana => 1);
206
207	=cut
208
209	sub internal_to_eucjapan ($;%) {
210	my $s = shift;
211	$s = \$s unless ref $s;
212	my %output = @_;
213	my $year = $output{edition} \|\| -1; ## -1 (= all unify), 1983, 1990 = 1997, 2000
214	$output{jisx02081978} = 1 if $year < 1983;
215	$output{jisx02081983} = 1 if $year == -1 \|\| (1983 <= $year && $year < 1990);
216	$output{jisx02081990} = 1 if $year == -1 \|\| (1990 <= $year && $year < 2000);
217	$output{jisx02121990} = 1 if $year == -1 \|\| (1990 <= $year && $year < 2000);
218	$output{jisx02132000_1} = 1 if $year == -1 \|\| (2000 <= $year);
219	$output{jisx02132000_2} = 1 if $year == -1 \|\| (2000 <= $year);
220	$output{undefchar} \|\|= "\xA2\xAE";
221	$$s =~ s{([\xC0-\xFF][\x80-\xBF]*)}{
222	my $char = $1; my $code = _ucode($char); my $ret = "";
223	if ($code < 0x7F) { ## G0 = ASCII
224	$ret = pack("C", $code);
225	} elsif ($output{jisx0201latin} && $internalo{jisx0201latin} < $code
226	&& $code < $internalo{jisx0201latin_end}) { ## G0 = JIS X 0201 latin
227	$ret = pack("C", $code - $internalo{jisx0201latin} + 0x21);
228	} elsif ($output{jisx02081978}
229	&& ($internalo{jisx02081978} < $code && $code < $internalo{jisx02081978_end})
230	) { ## G1 = JIS X 0208-1978
231	my $ku = $code - $internalo{jisx02081978};
232	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
233	$ret = pack("CC", $ku, $ten);
234	} elsif ($output{jisx02081983}
235	&& ($internalo{jisx02081983} < $code && $code < $internalo{jisx02081983_end})
236	) { ## G1 = JIS X 0208-1983
237	my $ku = $code - $internalo{jisx02081983};
238	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
239	$ret = pack("CC", $ku, $ten);
240	} elsif ($output{jisx02081990}
241	&& ($internalo{jisx02081990} < $code && $code < $internalo{jisx02081990_end})
242	) { ## G1 = JIS X 0208-1990 / JIS X 0208:1997
243	my $ku = $code - $internalo{jisx02081990};
244	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
245	$ret = pack("CC", $ku, $ten);
246	} elsif ($output{jisx02132000_1}
247	&& ($internalo{jisx02132000_1} < $code && $code < $internalo{jisx02132000_1_end})
248	) { ## G1 = JIS X 0213:2000 plane 1
249	my $ku = $code - $internalo{jisx02132000_1};
250	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
251	$ret = pack("CC", $ku, $ten);
252	} elsif ($output{jisx0201kana} && $internalo{jisx0201kana} < $code
253	&& $code < $internalo{jisx0201kana_end}) { ## G2 = JIS X 0201 katakana
254	$ret = "\x8E" . pack("C", $code - $internalo{jisx0201kana} + 0xA1);
255	} elsif ($output{jisx02121990}
256	&& ($internalo{jisx02121990} < $code && $code < $internalo{jisx02121990_end})
257	) { ## G3 = JIS X 0213:2000 plane 2
258	my $ku = $code - $internalo{jisx02121990};
259	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
260	$ret = "\x8F" . pack("CC", $ku, $ten);
261	} elsif ($output{jisx02132000_2}
262	&& ($internalo{jisx02132000_2} < $code && $code < $internalo{jisx02132000_2_end})
263	) { ## G3 = JIS X 0213:2000 plane 2
264	my $ku = $code - $internalo{jisx02132000_2};
265	my $ten = ($ku % 94) + 0xA1; $ku = int($ku / 94) + 0xA1;
266	$ret = "\x8F" . pack("CC", $ku, $ten);
267	} else {
268	$ret = $output{undefchar};
269	}
270	$ret;
271	}goex;
272	$$s;
273	}
274
275	=head2 internal_to_junet ($sering, [%option])
276
277	Convert internal coded string to junet coded string.
278
279	=head3 options
280
281	* g0_96
282	* utf8
283
284	=cut
285
286	sub internal_to_junet ($;%) {
287	my $s = shift;
288	$s = \$s unless ref $s;
289	my %output = @_; my $mode = "\x1B\x28\x42";
290	$output{undefchar} \|\|= 0x3F-0x21;
291	$output{undefcharset} \|\|= "\x1B\x28\x42";
292	$$s =~ s{([\x00-\x7F]\|(?:[\xC0-\xFF][\x80-\xBF]*))}{
293	my $char = $1; my $code = _ucode($char); my $ret = "";
294	if ($code < 0x9F) { ## ASCII
295	$ret = _2022_putchar(\$mode => "\x1B\x28\x42", $code-0x21);
296	} elsif ($code < 0xFF) { ## ISO 8859-1 right half
297	$ret = _2022_putchar(\$mode => "\x1B\x2C\x41", $code-0xA0);
298	} elsif ($internalo{94x1} < $code && $code < $internalo{94x1} + 94*78 -1) {
299	## 94 charsets
300	my $final = pack("C", int(($code - $internalo{94x1}) / 94) + 0x30);
301	$ret = _2022_putchar(\$mode => "\x1B\x28".$final,
302	($code - $internalo{94x1}) % 94);
303	} elsif ($output{g0_96}
304	&& $internalo{96x1} < $code && $code < $internalo{96x1} + 96*78 -1) {
305	## 96 charsets
306	my $final = pack("C", int(($code - $internalo{96x1}) / 96) + 0x30);
307	$ret = _2022_putchar(\$mode => "\x1B\x2C".$final,
308	($code - $internalo{96x1}) % 96);
309	} elsif ($internalo{94x2} < $code && $code < $internalo{94x2} + 949478 -1) {
310	## 94x2 charsets
311	my $final = pack("C", int(($code - $internalo{94x2}) / (94*94)) + 0x30);
312	$ret = _2022_putchar(\$mode => "\x1B\x24\x28".$final,
313	($code - $internalo{94x2}) % (94*94));
314	} elsif ($internalo{jisx02081990} < $code
315	&& $code < $internalo{jisx02081990} + 94*94 -1) {
316	$ret = _2022_putchar(\$mode => "\x1B\x26\x40\x1B\x24B",
317	($code - $internalo{94x2}) % (94*94));
318	} elsif ($output{utf8}) {
319	$ret = _2022_putchar(\$mode => "\x1B\x25G", $char)
320	} else {
321	$ret = _2022_putchar(\$mode => $output{undefcharset} => $output{undefchar});
322	}
323	$ret;
324	}goesx;
325	$$s;
326	}
327	sub _2022_putchar ($$$) {
328	my ($mode, $newmode, $char) = @_;
329	my $ret = ""; my %is;
330	$is{multibyte} = 1 if $newmode =~ /\x24/;
331	$is{set96} = 1 if $newmode =~ /\x2C/;
332	if ($$mode ne $newmode) {
333	if ($$mode eq "\x1B\x25G") {
334	$ret = "\x1B\x25\x40\x1B\x28\x42";
335	}
336	if ($is{multibyte} \|\| $is{set96} \|\| $newmode eq "\x1B\x25G") {
337	$ret .= "\x1B\x28\x42";
338	}
339	if ($newmode =~ /\x1B\x24\x28([\x40-\x42])/) {
340	$ret .= "\x1B\x24$1";
341	} else {
342	$ret .= $newmode;
343	}
344	$$mode = $newmode;
345	}
346	if ($is{multibyte} && $is{set96}) { ## 96x2
347	$ret .= pack("CC", int($char / 96) + 0x20, ($char % 96) + 0x20);
348	} elsif ($is{multibyte}) { ## 94x2
349	$ret .= pack("CC", int($char / 94) + 0x21, ($char % 94) + 0x21);
350	} elsif ($is{set96}) { ## 96x1
351	$ret .= pack("C", $char + 0x20);
352	} elsif ($newmode eq "\x1B\x25G") { ## utf-8
353	$ret .= $char; ## if utf-8, $char is char itself!
354	} else { ## 94x1
355	$ret .= pack("C", $char + 0x21);
356	}
357	$ret;
358	}
359
360	sub eucjapan_to_internal ($;%) {
361	my $s = shift;
362	$s = \$s unless ref $s;
363	my %option = @_;
364	my $year = $option{edition} \|\| 2000; ## 1978, 1983, 1990=1997, 2000
365	$option{G0start} \|\|= 0x21; $option{G2start} \|\|= $internalo{jisx0201kana};
366	if ($option{G1start} && $option{G3start}) {}
367	elsif ($year < 1983)
368	{$option{G1start} \|\|= $internalo{jisx02081978}; $option{G3start} \|\|= -1}
369	elsif (1983 <= $year && $year < 1990)
370	{$option{G1start} \|\|= $internalo{jisx02081983}; $option{G3start} \|\|= -1}
371	elsif (1990 <= $year && $year < 2000)
372	{$option{G1start} \|\|= $internalo{jisx02081990}; $option{G3start} \|\|= -1}
373	else #elsif (2000 <= $year)
374	{$option{G1start} \|\|= $internalo{jisx02132000_1}; $option{G3start} \|\|= -1}
375	$$s =~ s{([\x21-\x7E]\|\x8E[\xA1-\xFE]\|\x8F?[\xA1-\xFE][\xA1-\xFE])}{
376	my $char = $1; my $ret = "";
377	if ($char =~ /[\x21-\x7E]/) {
378	$ret = _u8(unpack("C", $char) - 0x21 + $option{G0start});
379	} elsif ($char =~ /\x8F/) {
380	my $ku = unpack("C", substr($char,1,1)) - 0xA1;
381	my $ten = unpack("C", substr($char,2,1)) - 0xA1;
382	if ($option{G3start} == -1) {
383	if (77 <= $ku \|\| $ku == 0 \|\| $ku == 2 \|\| $ku == 3 \|\| $ku == 4
384	\|\| $ku == 7 \|\| $ku == 11 \|\| $ku == 12 \|\| $ku == 13 \|\| $ku == 14) {
385	$ret = _u8($ku * 94 + $ten + $internalo{jisx02132000_2});
386	} else {
387	$ret = _u8($ku * 94 + $ten + $internalo{jisx02121990});
388	}
389	} else {
390	$ret = _u8($ku * 94 + $ten + $option{G3start});
391	}
392	} elsif ($char =~ /\x8E/) {
393	$ret = _u8(unpack("C", substr($char,1,1)) - 0xA1 + $option{G2start});
394	} else {
395	my $ku = unpack("C", substr($char,0,1)) - 0xA1;
396	my $ten = unpack("C", substr($char,1,1)) - 0xA1;
397	$ret = _u8($ku * 94 + $ten + $option{G1start});
398	}
399	$ret;
400	}goex;
401	}
402
403	=head1 NAME
404
405	M17N::Code::JA --- Japanese string coding system convertion
406
407	=head1 LICENSE
408
409	This program is free software; you can redistribute it and/or
410	modify it under the same terms as Perl itself.
411
412	=head1 AUTHOR
413
414	wakaba <wakaba@suika.fam.cx>
415
416	=cut
417
418	1;