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=head1 NAME |
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Encode::SJIS --- Shift JIS coding systems encoder and decoder |
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=head1 ENCODINGS |
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|
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This module defines encoding engine for Shift JIS coding systems. |
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This module only provides general en/decoding parts. Actual profiles |
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for Shift JISes are included in Encode::SJIS::*. |
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|
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=over 4 |
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|
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=cut |
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|
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package Encode::SJIS; |
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use 5.7.3; |
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use strict; |
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our $VERSION=do{my @r=(q$Revision: 1.4 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r}; |
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require Encode::Charset; |
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use base qw(Encode::Encoding); |
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|
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*new_object = \&Encode::Charset::new_object_sjis; |
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|
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## Code extention escape sequence defined by ISO/IEC 2022 is |
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## not supported in this version of this module. |
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|
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sub sjis_to_internal ($$) { |
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my ($s, $C) = @_; |
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$C ||= &new_object; |
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$s =~ s{ |
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([\x00-\x7F\xA1-\xDF]) |
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# ([\xA1-\xDF]) |
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|([\x81-\x9F\xE0-\xFC][\x40-\x7E\x80-\xFC]) |
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|\x1B([\x40-\x5F]) |
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|([\x80-\xFF]) ## Broken or supplemental 1-byte character |
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}{ |
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my ($c7, $c2, $c1, $c8) = ($1, $2, $3, $4); |
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if (defined $c7) { |
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if ($c7 =~ /([\x21-\x7E])/) { |
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chr ($C->{ $C->{GL} }->{ucs} + ord ($1) - 0x21); |
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} elsif ($c7 =~ /([\x00-\x1F])/) { |
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chr ($C->{ $C->{CL} }->{ucs} + ord ($1)); |
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} elsif ($C->{GR} && $c7 =~ /([\xA1-\xDF])/) { |
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chr ($C->{ $C->{GR} }->{ucs} + ord ($1) - 0xA1); |
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} else { ## 0x20, 0x7F |
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$C->{Gsmap}->{ $c7 } || $c7; |
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} |
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} elsif ($c2) { |
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if ($c2 =~ /([\x81-\xEF])(.)/) { |
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my ($f, $s) = (ord $1, ord $2); |
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$f -= $f < 0xA0 ? 0x81 : 0xC1; $s -= 0x40 + ($s > 0x7F); |
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chr ($C->{G1}->{ucs} + $f * 188 + $s); |
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} else { ## [\xF0-\xFC]. |
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my ($f, $s) = unpack ('CC', $c2); |
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if ($C->{G3}->{Csjis_kuE}) { |
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$f = $s > 0x9E ? $C->{G3}->{Csjis_kuE}->{ $f }: |
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$C->{G3}->{Csjis_kuO}->{ $f }; |
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$s -= ($s > 0x9E ? 0x9F : $s > 0x7F ? 0x41 : 0x40); |
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chr ($C->{G3}->{ucs} + $f * 94 + $s); |
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} else { |
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$f -= 0xF0; $s -= 0x40 + ($s > 0x7F); |
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chr ($C->{G3}->{ucs} + $f * 188 + $s); |
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} |
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} |
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} elsif ($c1) { ## ESC Fe |
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chr ($C->{ $C->{ESC_Fe} }->{ucs} + ord ($c1) - 0x40); |
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} else { # $C8 |
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$C->{Gsmap}->{ $c8 } || $c8; |
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} |
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}gex; |
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$s; |
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} |
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|
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sub internal_to_sjis ($\%) { |
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use integer; |
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my ($s, $C) = @_; |
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$C ||= &new_object; |
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|
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my $r = ''; |
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my @c = split //, $s; |
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for my $i (0..$#c) { |
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my $c = $c[$i]; my $cc = ord $c; Encode::_utf8_off ($c); |
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my $t; |
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## CL = C0 control characters |
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if ($cc <= 0x1F) { |
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$t = $c if $C->{ $C->{CL} } eq $Encode::Charset::CHARSET{C0}->{"\x40"}; |
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## 0x20 == SP and 0x7E == DEL |
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} elsif ($cc == 0x20 || $cc == 0x7F) { |
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$t = $c; |
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## GL = G0 = ISO/IEC 646 graphic character set |
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} elsif ($cc < 0x7F) { |
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$t = $c if $C->{ $C->{GL} } eq $Encode::Charset::CHARSET{G94}->{"\x42"}; |
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## 0x80 |
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} elsif ($C->{option}->{C1invoke_to_right} && $cc == 0x80) { |
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$t = "\x80" |
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if $C->{ $C->{CR} } eq $Encode::Charset::CHARSET{C1}->{'64291991C1'}; |
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## ESC Fe = C1 control characters |
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} elsif ($cc <= 0x9F) { |
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$t = "\x1B".pack 'C', ($cc - 0x40) |
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if $C->{ $C->{ESC_Fe} } eq $Encode::Charset::CHARSET{C1}->{'64291991C1'}; |
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## G1 or G3 = 94^2 graphic character set from ISO-IR |
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} elsif (0xE9F6C0 <= $cc && $cc <= 0xF06F80) { |
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my $c = $cc - 0xE9F6C0; my $F = chr (($c / 8836)+0x30); |
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if ($C->{G1} eq $Encode::Charset::CHARSET{G94n}->{ $F }) { |
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my ($c1, $c2) = ((($c % 8836) / 94)+0x21, ($c % 94)+0x21); |
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$t = pack ('CC', (($c1 - 1) >> 1) + ($c1 < 0x5F ? 0x71 : 0xB1), |
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$c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)); |
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} elsif ($C->{G3} eq $Encode::Charset::CHARSET{G94n}->{ $F }) { |
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my ($c1, $c2) = ((($c % 8836) / 94)+0x21, ($c % 94)+0x21); |
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if ($C->{G3}->{Csjis_first}) { |
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my $fb = $C->{G3}->{Csjis_first}->{ ($c % 8836) / 94 }; |
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$t = pack ('CC', $fb, $c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)) if $fb; |
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} else { |
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$t = pack ('CC', ($c / 188) + 0xF0, |
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$c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)) |
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if ($c / 188) + 0xF0 < 0xFD; |
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} |
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} |
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## G1 = JIS X 0208-1990/:1997 |
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} elsif (0xF49D7C <= $cc && $cc <= 0xF4BFFF) { |
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my $c = $cc - 0xF49D7C; |
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if ($C->{G1} eq $Encode::Charset::CHARSET{G94n}->{'B@'}) { |
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my ($c1, $c2) = ((($c % 8836) / 94)+0x21, ($c % 94)+0x21); |
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$t = pack ('CC', (($c1 - 1) >> 1) + ($c1 < 0x5F ? 0x71 : 0xB1), |
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$c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)); |
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} |
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## GL = G0 = ISO/IEC 646 graphic character set / GR = G2 = JIS X 0201 Katakana set |
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} elsif (0xE90940 <= $cc && $cc <= 0xE92641) { |
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my $c = $cc - 0xE90940; my $F = chr (($c / 94)+0x30); |
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if ($C->{ $C->{GL} } eq $Encode::Charset::CHARSET{G94}->{ $F }) { |
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$t = pack 'C', (($c % 94) + 0x21); |
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} elsif ($C->{ $C->{GR} } eq $Encode::Charset::CHARSET{G94}->{ $F }) { |
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$t = pack 'C', (($c % 94) + 0xA1) if ($c % 94) < 0x3F; |
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} |
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## G1 / G3 = 94^2 graphic character set |
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} elsif (0x70420000 <= $cc && $cc <= 0x7046F19B) { |
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my $c = $cc % 0x10000; |
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my $F0=$C->{option}->{private_set}->{G94n}->[($cc/0x10000)-0x7042]->[$c/8836]; |
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my $F1 = 'P'.(($cc / 0x10000) - 0x7042).'_'.($c / 8836); |
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if ($C->{G3} eq $Encode::Charset::CHARSET{G94n}->{ $F0 } |
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|| $C->{G3} eq $Encode::Charset::CHARSET{G94n}->{ $F1 }) { |
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my ($c1, $c2) = ((($c % 8836) / 94)+0x21, ($c % 94)+0x21); |
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if ($C->{G3}->{Csjis_first}) { |
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my $fb = $C->{G3}->{Csjis_first}->{ ($c % 8836) / 94 }; |
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$t = pack ('CC', $fb, $c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)) if $fb; |
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} else { |
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$t = pack ('CC', ($c / 188) + 0xF0, |
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$c2 + (($c1 & 1) ? ($c2 < 0x60 ? 0x1F : 0x20) : 0x7E)) |
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if ($c / 188) + 0xF0 < 0xFD; |
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} |
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} |
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## Other character sets are not supported now (and there is no plan to implement them). |
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} |
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## Output the character itself |
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if (defined $t) { |
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$r .= $t; |
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## Output the character itself with mapping table of special code positions |
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} elsif ($C->{GsmapR}->{ $c }) { |
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$r .= $C->{GsmapR}->{ $c }; |
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} elsif ($C->{option}->{fallback_from_ucs} =~ /quiet/) { |
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return ($r, halfway => 1, converted_length => $i, |
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warn => $C->{option}->{fallback_from_ucs} =~ /warn/ ? 1 : 0, |
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reason => sprintf (q(U+%04X: There is no character mapped to), $cc)); |
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} elsif ($C->{option}->{fallback_from_ucs} eq 'croak') { |
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return ($r, halfway => 1, die => 1, |
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reason => sprintf (q(U+%04X: There is no character mapped to), $cc)); |
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## |
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} else { |
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## Try to output with fallback escape sequence (if specified) |
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my $t = Encode::Charset::fallback_escape ($C, $c); |
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if (defined $t) { |
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my %D = (fallback => $C->{option}->{fallback_from_ucs}, reset => $C->{option}->{reset}); |
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$C->{option}->{fallback_from_ucs} = 'croak'; |
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$C->{option}->{reset} = {Gdesignation => 0, Ginvoke => 0}; |
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eval q{$t = $C->{_encoder}->_encode_internal ($t, $C)} or undef $t; |
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$C->{option}->{fallback_from_ucs} = $D{fallback}; |
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$C->{option}->{reset} = $D{reset}; |
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} |
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if (defined $t) { |
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$r .= $t; |
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} else { ## Replacement character specified in charset definition |
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$r .= $C->{option}->{undef_char_sjis} || "\x3F"; |
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} |
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} |
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} |
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$r; |
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} |
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|
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=back |
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=head1 SEE ALSO |
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|
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JIS X 0208:1997, "7-bit and 8-bit double byte coded Kanji |
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set for information interchange", Japan Industrial Standards |
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Committee (JISC) <http://www.jisc.go.jp/>, 1997. |
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|
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JIS X 0213:2000, "7-bit and 8-bit double byte coded extended Kanji |
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sets for information interchange", Japan Industrial Standards |
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Committee (JISC) <http://www.jisc.go.jp/>, 2000. |
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|
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L<Encode::SJIS::JIS> |
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|
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L<Encode>, L<perlunicode> |
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|
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L<Encode::Charset>, L<Encode::ISO2022> |
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|
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=head1 LICENSE |
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|
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Copyright 2002 Nanashi-san <nanashi-san@nanashi.invalid> |
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|
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This library is free software; you can redistribute it |
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and/or modify it under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # $Date: 2002/12/12 08:17:16 $ |
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