| 1 |
|
| 2 |
=head1 NAME |
| 3 |
|
| 4 |
Encode::ISO2022 --- ISO/IEC 2022 encoder and decoder |
| 5 |
|
| 6 |
=head1 ENCODINGS |
| 7 |
|
| 8 |
=over 4 |
| 9 |
|
| 10 |
=item iso2022 |
| 11 |
|
| 12 |
ISO/IEC 2022:1994. Default status is: |
| 13 |
|
| 14 |
=over 2 |
| 15 |
|
| 16 |
=item CL = C0 = ISO/IEC 6429:1991 C0 set |
| 17 |
|
| 18 |
=item CR = C1 = ISO/IEC 6429:1991 C1 set |
| 19 |
|
| 20 |
=item GL = G0 = ISO/IEC 646:1991 IRV GL(G0) set |
| 21 |
|
| 22 |
=item GR = G1 = empty set |
| 23 |
|
| 24 |
=item G2 = empty set |
| 25 |
|
| 26 |
=item G3 = empty set |
| 27 |
|
| 28 |
=back |
| 29 |
|
| 30 |
(Alias: iso/iec2022, iso-2022, 2022, cp2022) |
| 31 |
|
| 32 |
=back |
| 33 |
|
| 34 |
Note that ISO/IEC 2022 based encodings are found in |
| 35 |
Encode::ISO2022::* modules. This module, Encode::ISO2022 |
| 36 |
only provides a general ISO/IEC 2022 encoder/decoder. |
| 37 |
|
| 38 |
=cut |
| 39 |
|
| 40 |
require v5.7.3; |
| 41 |
package Encode::ISO2022; |
| 42 |
use strict; |
| 43 |
use vars qw(%CHARSET %CODING_SYSTEM $VERSION); |
| 44 |
$VERSION=do{my @r=(q$Revision: 1.10 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r}; |
| 45 |
use base qw(Encode::Encoding); |
| 46 |
__PACKAGE__->Define (qw!iso-2022 iso/iec2022 iso2022 2022 cp2022!); |
| 47 |
require Encode::Charset; |
| 48 |
*CHARSET = \%Encode::Charset::CHARSET; |
| 49 |
*CODING_SYSTEM = \%Encode::Charset::CODING_SYSTEM; |
| 50 |
|
| 51 |
### --- Perl Encode module common functions |
| 52 |
|
| 53 |
sub encode ($$;$) { |
| 54 |
my ($obj, $str, $chk) = @_; |
| 55 |
$_[1] = '' if $chk; |
| 56 |
$str = &internal_to_iso2022 ($str); |
| 57 |
return $str; |
| 58 |
} |
| 59 |
|
| 60 |
sub decode ($$;$) { |
| 61 |
my ($obj, $str, $chk) = @_; |
| 62 |
$_[1] = '' if $chk; |
| 63 |
return &iso2022_to_internal ($str); |
| 64 |
} |
| 65 |
|
| 66 |
### --- Encode::ISO2022 unique functions |
| 67 |
*new_object = \&Encode::Charset::new_object; |
| 68 |
|
| 69 |
sub iso2022_to_internal ($;%) { |
| 70 |
my ($s, $C) = @_; |
| 71 |
$C ||= &new_object; |
| 72 |
my $t = ''; |
| 73 |
$s =~ s{^((?:(?!\x1B\x25\x2F?[\x30-\x7E]).)*)}{ |
| 74 |
my $i2 = $1; |
| 75 |
$t = _iso2022_to_internal ($i2, $C); |
| 76 |
''; |
| 77 |
}es; |
| 78 |
my $pad = ''; |
| 79 |
use re 'eval'; |
| 80 |
$s =~ s{ |
| 81 |
## ISO/IEC 2022 |
| 82 |
(??{"$pad\x1B$pad\x25$pad\x40"})((?:(?!\x1B\x25\x2F?[\x30-\x7E]).)*) |
| 83 |
## UTF-8 |
| 84 |
|(??{"$pad\x1B$pad\x25$pad(?:\x47|\x2F$pad"."[\x47-\x49])"}) |
| 85 |
((?:(?!\x1B\x25\x2F?[\x30-\x7E]).)*) |
| 86 |
## UCS-2, UTF-16 |
| 87 |
|(??{"$pad\x1B$pad\x25$pad\x2F$pad"})([\x40\x43\x45\x4A-\x4C]) |
| 88 |
((?:(?!\x00\x1B\x00\x25(?:\x00\x2F)?\x00[\x30-\x7E])..)*) |
| 89 |
## UCS-4 |
| 90 |
|(??{"$pad\x1B$pad\x25$pad\x2F$pad"})[\x41\x44\x46] |
| 91 |
((?:(?!\x00\x00\x00\x1B\x00\x00\x00\x25(?:\x00\x00\x00\x2F)? |
| 92 |
\x00\x00\x00[\x30-\x7E])....)*) |
| 93 |
## with standard return |
| 94 |
|(??{"$pad\x1B$pad\x25$pad"})([\x30-\x7E]) |
| 95 |
((?:(?!\x1B\x25\x2F?[\x30-\x7E]).)*) |
| 96 |
## without standard return |
| 97 |
|(??{"$pad\x1B$pad\x25$pad\x2F$pad"})([\x30-\x7E])(.*) |
| 98 |
}{ |
| 99 |
my ($i2,$u8,$Fu2,$u2,$u4,$Fsr,$sr,$Fnsr,$nsr) = ($1,$2,$3,$4,$5,$6,$7,$8,$9); |
| 100 |
my $r = ''; |
| 101 |
if (defined $i2) { |
| 102 |
$r = _iso2022_to_internal ($i2, $C); $pad = ''; |
| 103 |
} elsif (defined $u8) { |
| 104 |
$r = Encode::decode ('utf8', $u8); $pad = ''; |
| 105 |
} elsif ($Fu2) { |
| 106 |
if (ord ($Fu2) > 0x49) { |
| 107 |
$r = Encode::decode ('utf-16be', $u2); |
| 108 |
} else { |
| 109 |
$r = Encode::decode ('ucs-2be', $u2); |
| 110 |
} |
| 111 |
$pad = "\x00"; |
| 112 |
} elsif (defined $u4) { |
| 113 |
$r = Encode::decode ('ucs-4be', $u2); $pad = "\x00\x00\x00"; |
| 114 |
} elsif (defined $Fsr && $CODING_SYSTEM{$Fsr}->{perl_name}) { |
| 115 |
$r = Encode::decode ($CODING_SYSTEM{$Fsr}->{perl_name}, $sr); $pad = ''; |
| 116 |
} elsif (defined $Fnsr && $CODING_SYSTEM{$Fnsr}->{perl_name}) { |
| 117 |
$r = Encode::decode ($CODING_SYSTEM{$Fnsr}->{perl_name}, $nsr); $pad = ''; |
| 118 |
} else { ## temporary |
| 119 |
$r = '?' x length ($sr.$nsr); $pad = ''; |
| 120 |
} |
| 121 |
$r; |
| 122 |
}gesx; |
| 123 |
$t . $s; |
| 124 |
} |
| 125 |
|
| 126 |
# this is very very trickey. my perl 5.8.0 does not process |
| 127 |
# regex with eval except the first time (i think it's a bug |
| 128 |
# of perl), so we redefine this function whenever being called! |
| 129 |
# when this unexpected behavior is fixed or someone finds |
| 130 |
# better way to avoid it, we will rewrite this code. |
| 131 |
&_iso2022_to_internal (undef); |
| 132 |
sub _iso2022_to_internal ($;%) { |
| 133 |
eval q{ sub __iso2022_to_internal ($;%) { 0 } }; |
| 134 |
eval q{ |
| 135 |
sub __iso2022_to_internal ($;%) { |
| 136 |
use re 'eval'; |
| 137 |
my ($s, $C) = @_; |
| 138 |
my %_GB_to_GN = ( |
| 139 |
"\x28"=>'G0',"\x29"=>'G1',"\x2A"=>'G2',"\x2B"=>'G3', |
| 140 |
"\x2C"=>'G0',"\x2D"=>'G1',"\x2E"=>'G2',"\x2F"=>'G3', |
| 141 |
); |
| 142 |
my %_CHARS_to_RANGE = ( |
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l94 => q/[\x21-\x7E]/, l96 => q/[\x20-\x7F]/, |
| 144 |
l128 => q/[\x00-\x7F]/, l256 => q/[\x00-\xFF]/, |
| 145 |
r94 => q/[\xA1-\xFE]/, r96 => q/[\xA0-\xFF]/, |
| 146 |
r128 => q/[\x80-\xFF]/, r256 => q/[\x80-\xFF]/, |
| 147 |
b94 => q/[\x21-\x7E\xA1-\xFE]/, b96 => q/[\x20-\x7F\xA0-\xFF]/, |
| 148 |
b128 => q/[\x00-\xFF]/, b256 => q/[\x00-\xFF]/, |
| 149 |
); |
| 150 |
|
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$s =~ s{ |
| 152 |
((??{ $_CHARS_to_RANGE{'l'.$C->{$C->{GL}}->{chars}} |
| 153 |
. qq/{$C->{$C->{GL}}->{dimension},$C->{$C->{GL}}->{dimension}}/ })) |
| 154 |
|((??{ $_CHARS_to_RANGE{'r'.$C->{$C->{GR}}->{chars}} |
| 155 |
. qq/{$C->{$C->{GR}}->{dimension},$C->{$C->{GR}}->{dimension}}/ })) |
| 156 |
| (??{ q/(?:/ . ($C->{$C->{CR}}->{r_SS2} || '(?!)') |
| 157 |
. ($C->{$C->{ESC_Fe}}->{r_SS2_ESC} ? |
| 158 |
qq/|$C->{$C->{ESC_Fe}}->{r_SS2_ESC}/ : '') |
| 159 |
. ($C->{$C->{CL}}->{r_SS2} ? qq/|$C->{$C->{CL}}->{r_SS2}/ : '') . q/)/ |
| 160 |
. ( $C->{$C->{CL}}->{r_LS0} |
| 161 |
||$C->{$C->{CL}}->{r_LS1}? ## ISO/IEC 6429:1992 9 |
| 162 |
qq/[$C->{$C->{CL}}->{r_LS0}$C->{$C->{CL}}->{r_LS1}]*/:'') |
| 163 |
}) |
| 164 |
((??{ $_CHARS_to_RANGE{'b'.$C->{G2}->{chars}} |
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. qq/{$C->{G2}->{dimension},$C->{G2}->{dimension}}/ })) |
| 166 |
| (??{ q/(?:/ . ($C->{$C->{CR}}->{r_SS3} || '(?!)') |
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. ($C->{$C->{ESC_Fe}}->{r_SS3_ESC} ? |
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qq/|$C->{$C->{ESC_Fe}}->{r_SS3_ESC}/ : '') |
| 169 |
. ($C->{$C->{CL}}->{r_SS3} ? qq/|$C->{$C->{CL}}->{r_SS3}/ : '') . q/)/ |
| 170 |
. ( $C->{$C->{CL}}->{r_LS0} |
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|| $C->{$C->{CL}}->{r_LS1}? ## ISO/IEC 6429:1992 9 |
| 172 |
qq/[$C->{$C->{CL}}->{r_LS0}$C->{$C->{CL}}->{r_LS1}]*/:'') |
| 173 |
}) |
| 174 |
((??{ $_CHARS_to_RANGE{'b'.$C->{G3}->{chars}} |
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. qq/{$C->{G3}->{dimension},$C->{G3}->{dimension}}/ })) |
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|
| 177 |
## Locking shift |
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|( (??{ $C->{$C->{CL}}->{r_LS0}||'(?!)' }) |
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|(??{ $C->{$C->{CL}}->{r_LS1}||'(?!)' }) |
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) |
| 181 |
|
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## Control sequence |
| 183 |
|(??{ '(?:'.($C->{$C->{CR}}->{r_CSI}||'(?!)') |
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.($C->{$C->{ESC_Fe}}->{r_CSI_ESC} ? |
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qq/|$C->{$C->{ESC_Fe}}->{r_CSI_ESC}/: '') |
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.')' |
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}) |
| 188 |
((??{ qq/[\x30-\x3F$C->{$C->{CL}}->{LS0}$C->{$C->{CL}}->{LS1}\xB0-\xBF]*/ |
| 189 |
.qq/[\x20-\x2F$C->{$C->{CL}}->{LS0}$C->{$C->{CL}}->{LS1}\xA0-\xAF]*/ |
| 190 |
}) [\x40-\x7E\xD0-\xFE]) |
| 191 |
|
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## Other escape sequence |
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|(\x1B[\x20-\x2F]*[\x30-\x7E]) |
| 194 |
|
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## Misc. sequence (SP, control, or broken data) |
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|([\x00-\xFF]) |
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}{ |
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my ($gl,$gr,$ss2,$ss3,$ls,$csi,$esc,$misc) |
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= ($1,$2,$3,$4,$5,$6,$7,$8,$9); |
| 200 |
$C->{_irr} = undef unless defined $esc; |
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## GL graphic character |
| 202 |
if (defined $gl) { |
| 203 |
my $c = 0; |
| 204 |
my $m = $C->{$C->{GL}}->{chars}==94?0x21:$C->{$C->{GL}}->{chars}==96?0x20:0; |
| 205 |
for (split //, $gl) { |
| 206 |
$c = $c * $C->{$C->{GL}}->{chars} + unpack ('C', $_) - $m; |
| 207 |
} |
| 208 |
chr ($C->{$C->{GL}}->{ucs} + $c); |
| 209 |
## GR graphic character |
| 210 |
} elsif ($gr) { |
| 211 |
my $c = 0; |
| 212 |
my $m = $C->{$C->{GR}}->{chars}==94?0xA1:$C->{$C->{GR}}->{chars}==96?0xA0:0x80; |
| 213 |
for (split //, $gr) { |
| 214 |
$c = $c * $C->{$C->{GR}}->{chars} + unpack ('C', $_) - $m; |
| 215 |
} |
| 216 |
chr ($C->{$C->{GR}}->{ucs} + $c); |
| 217 |
## Control, SP, or broken data |
| 218 |
## TODO: support control sets other than ISO/IEC 6429's |
| 219 |
} elsif (defined $misc) { |
| 220 |
$misc; |
| 221 |
## Graphic character with SS2 |
| 222 |
} elsif ($ss2) { |
| 223 |
$ss2 =~ tr/\x80-\xFF/\x00-\x7F/; |
| 224 |
my $c = 0; my $m = $C->{G2}->{chars}==94?0x21:$C->{G2}->{chars}==96?0x20:0; |
| 225 |
for (split //, $ss2) { |
| 226 |
$c = $c * $C->{G2}->{chars} + unpack ('C', $_) - $m; |
| 227 |
} |
| 228 |
chr ($C->{G2}->{ucs} + $c); |
| 229 |
## Graphic character with SS3 |
| 230 |
} elsif ($ss3) { |
| 231 |
$ss3 =~ tr/\x80-\xFF/\x00-\x7F/; |
| 232 |
my $c = 0; my $m = $C->{G3}->{chars}==94?0x21:$C->{G3}->{chars}==96?0x20:0; |
| 233 |
for (split //, $ss3) { |
| 234 |
$c = $c * $C->{G3}->{chars} + unpack ('C', $_) - $m; |
| 235 |
} |
| 236 |
chr ($C->{G3}->{ucs} + $c); |
| 237 |
## Escape sequence |
| 238 |
} elsif ($esc) { |
| 239 |
if ($esc =~ /\x1B\x26([\x40-\x7E])/) { ## 6F (IRR) = ESC 02/06 Ft |
| 240 |
$C->{_irr} = $1; $esc = ''; |
| 241 |
} else { |
| 242 |
$esc =~ s{ |
| 243 |
\x1B([\x28-\x2B])(\x20?[\x21-\x23]?[\x30-\x7E]) ## Gx = 94^1 |
| 244 |
|\x1B\x24([\x28-\x2B]?)(\x20?[\x21-\x23]?[\x30-\x7E]) ## Gx = 94^n |
| 245 |
|
| 246 |
|\x1B([\x2C-\x2F])(\x20?[\x21-\x23]?[\x30-\x7E]) ## Gx = 96^1 |
| 247 |
|\x1B\x24([\x2C-\x2F])(\x20?[\x21-\x23]?[\x30-\x7E]) ## Gx = 96^n |
| 248 |
|
| 249 |
|\x1B([\x40-\x5F]) ## ESC Fe |
| 250 |
|
| 251 |
|\x1B\x21([\x21-\x23]?[\x30-\x7E]) ## CL = C0 |
| 252 |
|\x1B\x22([\x21-\x23]?[\x30-\x7E]) ## CR & ESC Fe = C1 |
| 253 |
|
| 254 |
|\x1B([\x60-\x7E]) ## Single control functions |
| 255 |
|\x1B\x23([\x21-\x23]?)([\x30-\x7E]) |
| 256 |
|
| 257 |
|\x1B\x20([\x40-\x7E]) ## Announcer |
| 258 |
}{ |
| 259 |
my ($g94_g,$g94_f,$g94n_g,$g94n_f,$g96_g,$g96_f,$g96n_g,$g96n_f,$Fe, |
| 260 |
$CZD, $C1D, $Fs, $sI, $sF,$ACS) |
| 261 |
= ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15); |
| 262 |
my $rev = $C->{_irr} || ''; |
| 263 |
my $f2s = $C->{option}->{final_to_set}; |
| 264 |
if ($g94_g) { ## ESC 02/08 [I] F |
| 265 |
$C->{ $_GB_to_GN{ $g94_g } } |
| 266 |
= $CHARSET{G94}->{ $f2s->{G94}->{$g94_f.$rev} || $g94_f.$rev } |
| 267 |
|| $CHARSET{G94}->{ $f2s->{G94}->{$g94_f} || $g94_f } |
| 268 |
|| $CHARSET{G94}->{ "\x7E" }; ''; |
| 269 |
} elsif (defined $g94n_f) { ## ESC 02/04 [02/08..11] [I] F |
| 270 |
$C->{ $_GB_to_GN{ $g94n_g } || 'G0' } |
| 271 |
= $CHARSET{G94n}->{ $f2s->{G94n}->{$g94n_f.$rev} || $g94n_f.$rev } |
| 272 |
|| $CHARSET{G94n}->{ $f2s->{G94n}->{$g94n_f} || $g94n_f } |
| 273 |
|| $CHARSET{G94n}->{ "\x7E" }; ''; |
| 274 |
} elsif ($g96_g) { ## ESC 02/12..15 [I] F |
| 275 |
$C->{ $_GB_to_GN{ $g96_g } } |
| 276 |
= $CHARSET{G96}->{ $f2s->{G96}->{$g96_f.$rev} || $g96_f.$rev } |
| 277 |
|| $CHARSET{G96}->{ $f2s->{G96}->{$g96_f} || $g96_f } |
| 278 |
|| $CHARSET{G96}->{ "\x7E" }; ''; |
| 279 |
} elsif ($g96n_g) { ## ESC 02/04 02/12..15 [I] F |
| 280 |
$C->{ $_GB_to_GN{ $g96n_g } } |
| 281 |
= $CHARSET{G96n}->{ $f2s->{G96n}->{$g96n_f.$rev} || $g96n_f.$rev } |
| 282 |
|| $CHARSET{G96n}->{ $f2s->{G96n}->{$g96n_f} || $g96n_f } |
| 283 |
|| $CHARSET{G96n}->{ "\x7E" }; ''; |
| 284 |
} elsif ($Fe) { ## ESC Fe = C1 |
| 285 |
chr ($C->{ $C->{ESC_Fe} }->{ucs} + (ord ($Fe) - 0x40)); |
| 286 |
} elsif (defined $Fs) { ## ESC Fs |
| 287 |
if ($Fs eq "\x6E") { ## LS2 |
| 288 |
$C->{GL} = 'G2'; ''; |
| 289 |
} elsif ($Fs eq "\x6F") { ## LS3 |
| 290 |
$C->{GL} = 'G3'; ''; |
| 291 |
} elsif ($Fs eq "\x7E" || $Fs eq "\x6B") { ## LS1R |
| 292 |
$C->{GR} = 'G1'; $C->{GL} = 'G1' if $C->{bit} == 7; ''; |
| 293 |
} elsif ($Fs eq "\x7D" || $Fs eq "\x6C") { ## LS2R |
| 294 |
$C->{GR} = 'G2'; $C->{GL} = 'G2' if $C->{bit} == 7; ''; |
| 295 |
} elsif ($Fs eq "\x7C" || $Fs eq "\x6D") { ## LS3R |
| 296 |
$C->{GR} = 'G3'; $C->{GL} = 'G3' if $C->{bit} == 7; ''; |
| 297 |
} else { |
| 298 |
chr ($CHARSET{single_control}->{Fs}->{ucs} + (ord ($Fs) - 0x60)); |
| 299 |
} |
| 300 |
} elsif (defined $CZD) { ## 1F (CZD) = ESC 02/01 [I] F |
| 301 |
$C->{C0} = $CHARSET{C0}->{ $f2s->{C0}->{$CZD.$rev} || $CZD.$rev } |
| 302 |
|| $CHARSET{C0}->{ $f2s->{C0}->{$CZD} || $CZD } |
| 303 |
|| $CHARSET{C0}->{ "\x7E" }; ''; |
| 304 |
} elsif (defined $C1D) { ## 2F (C1D) = ESC 02/02 [I] F |
| 305 |
$C->{C1} = $CHARSET{C1}->{ $f2s->{C1}->{$C1D.$rev} || $C1D.$rev } |
| 306 |
|| $CHARSET{C1}->{ $f2s->{C1}->{$C1D} || $C1D } |
| 307 |
|| $CHARSET{C1}->{ "\x7E" }; ''; |
| 308 |
} elsif ($sI) { ## 3F = ESC 02/03 [I] F |
| 309 |
chr ($CHARSET{single_control}->{'3F'.$sI}->{ucs} + (ord ($sF) - 0x30)); |
| 310 |
} elsif ($ACS) { ## 0F (Announcer) = ESC 02/00 F |
| 311 |
if ($ACS eq "\x4A") { $C->{bit} = 7 } |
| 312 |
elsif ($ACS eq "\x4B") { $C->{bit} = 8 } |
| 313 |
''; |
| 314 |
} |
| 315 |
}gex; |
| 316 |
$C->{_irr} = undef; |
| 317 |
} |
| 318 |
$esc; |
| 319 |
} elsif ($ls) { ## Locking shifts = LS0 / LS1 |
| 320 |
if ($ls eq $C->{$C->{CL}}->{LS0}) { |
| 321 |
$C->{GL} = 'G0'; ''; |
| 322 |
} elsif ($ls eq $C->{$C->{CL}}->{LS1}) { |
| 323 |
$C->{GL} = 'G1'; ''; |
| 324 |
} |
| 325 |
} elsif ($csi) { ## Control sequence = CSI [P..] [I] F |
| 326 |
$csi =~ tr/\xA0-\xFF/\x20-\x7F/d; |
| 327 |
$csi =~ s/$C->{$C->{CL}}->{LS0}//g if $C->{$C->{CL}}->{LS0}; |
| 328 |
$csi =~ s/$C->{$C->{CL}}->{LS1}//g if $C->{$C->{CL}}->{LS1}; |
| 329 |
"\x9B".$csi; |
| 330 |
} |
| 331 |
}gesx; |
| 332 |
$s; |
| 333 |
} # __iso2022_to_internal |
| 334 |
|
| 335 |
}; |
| 336 |
&__iso2022_to_internal (@_) if defined $_[0]; |
| 337 |
|
| 338 |
} # _iso2022_to_internal |
| 339 |
|
| 340 |
sub internal_to_iso2022 ($;%) { |
| 341 |
my ($s, $C) = @_; |
| 342 |
$C ||= &new_object; |
| 343 |
|
| 344 |
my $r = ''; |
| 345 |
for my $c (split //, $s) { |
| 346 |
my $cc = ord $c; Encode::_utf8_off ($c); |
| 347 |
my $t; |
| 348 |
if ($cc <= 0x1F) { |
| 349 |
$t = _i2c ($c, $C, type => 'C0', charset => '@'); |
| 350 |
} elsif ($cc == 0x20 || $cc == 0x7F) { |
| 351 |
$t = _back2ascii ($C) . $c; |
| 352 |
} elsif ($cc < 0x7F) { |
| 353 |
$t = _i2g ($c, $C, type => 'G94', charset => 'B'); |
| 354 |
} elsif ($cc <= 0x9F) { |
| 355 |
$t = _i2c (pack ('C', $cc), $C, type => 'C1', charset_id => '64291991C1', |
| 356 |
charset => $C->{option}->{private_set}->{XC1}->{'64291991C1'}); |
| 357 |
} elsif ($cc <= 0xFF) { |
| 358 |
$t = _i2g (pack ('C', $cc-0x80), $C, type => 'G96', charset => 'A'); |
| 359 |
} elsif ($cc <= 0x24FF) { |
| 360 |
my $c = $cc - 0x100; |
| 361 |
my $final = $C->{option}->{private_set}->{U96n}->[0]; |
| 362 |
if (length $final) { |
| 363 |
$t = _i2g (chr(($c / 96)+0x20).chr(($c % 96)+0x20), $C, |
| 364 |
type => 'G96n', charset => $final); |
| 365 |
} |
| 366 |
} elsif ($cc <= 0x33FF) { |
| 367 |
my $c = $cc - 0x2500; |
| 368 |
my $final = $C->{option}->{private_set}->{U96n}->[1]; |
| 369 |
if (length $final) { |
| 370 |
$t = _i2g (chr(($c / 96)+0x20).chr(($c % 96)+0x20), $C, |
| 371 |
type => 'G96n', charset => $final); |
| 372 |
} |
| 373 |
} elsif (0xE000 <= $cc && $cc <= 0xFFFF) { |
| 374 |
my $c = $cc - 0xE000; |
| 375 |
my $final = $C->{option}->{private_set}->{U96n}->[2]; |
| 376 |
if (length $final) { |
| 377 |
$t = _i2g (chr(($c / 96)+0x20).chr(($c % 96)+0x20), $C, |
| 378 |
type => 'G96n', charset => $final); |
| 379 |
} |
| 380 |
|
| 381 |
} elsif (0xE9F6C0 <= $cc && $cc <= 0xF06F80) { |
| 382 |
my $c = $cc - 0xE9F6C0; |
| 383 |
$t = _i2g (chr((($c % 8836) / 94)+0x21).chr(($c % 94)+0x21), $C, |
| 384 |
type => 'G94n', charset => chr(($c / 8836)+0x30)); |
| 385 |
} elsif (0xF49D7C <= $cc && $cc <= 0xF4BFFF) { |
| 386 |
my $c = $cc - 0xF49D7C; |
| 387 |
$t = _i2g (chr(($c / 94)+0x21).chr(($c % 94)+0x21), $C, |
| 388 |
type => 'G94n', charset => 'B', revision => '@'); |
| 389 |
|
| 390 |
} elsif (0xF0000 <= $cc && $cc <= 0x10F7FF) { |
| 391 |
my $c = $cc - 0xF0000; |
| 392 |
$t = _i2g (chr((($c % 9216) / 96)+0x20).chr(($c % 96)+0x20), $C, |
| 393 |
type => 'G96n', charset => "\x20".chr(($c / 9216)+0x40)); |
| 394 |
} elsif (0xE90940 <= $cc && $cc <= 0xE92641) { |
| 395 |
my $c = $cc - 0xE90940; |
| 396 |
$t = _i2g (chr(($c % 94)+0x21), $C, |
| 397 |
type => 'G94', charset => chr(($c / 94)+0x30)); |
| 398 |
} elsif (0xE92642 <= $cc && $cc <= 0xE9269F) { |
| 399 |
my $c = $cc - 0xE92642; |
| 400 |
$t = _i2g (chr($c+0x21),$C,type => 'G94', charset => "\x64", revision => '@'); |
| 401 |
} elsif (0xE926A0 <= $cc && $cc <= 0xE9443F) { |
| 402 |
my $c = $cc - 0xE926A0; |
| 403 |
$t = _i2g (chr(($c % 96)+0x20), $C, |
| 404 |
type => 'G96', charset => chr(($c / 96)+0x30)); |
| 405 |
} elsif (0xE944A0 <= $cc && $cc <= 0xE961A1) { |
| 406 |
my $c = $cc - 0xE944A0; |
| 407 |
$t = _i2g (chr(($c % 94)+0x21), $C, |
| 408 |
type => 'G94', charset => '!'.chr(($c / 94)+0x30)); |
| 409 |
} elsif (0xE96200 <= $cc && $cc <= 0xE97F9F) { |
| 410 |
my $c = $cc - 0xE96200; |
| 411 |
$t = _i2g (chr(($c % 96)+0x20), $C, |
| 412 |
type => 'G96', charset => '!'.chr(($c / 96)+0x30)); |
| 413 |
} elsif (0xE98000 <= $cc && $cc <= 0xE99D01) { |
| 414 |
my $c = $cc - 0xE98000; |
| 415 |
$t = _i2g (chr(($c % 94)+0x21), $C, |
| 416 |
type => 'G94', charset => '"'.chr(($c / 94)+0x30)); |
| 417 |
} elsif (0xE99D60 <= $cc && $cc <= 0xE9BAFF) { |
| 418 |
my $c = $cc - 0xE99D60; |
| 419 |
$t = _i2g (chr(($c % 96)+0x20), $C, |
| 420 |
type => 'G96', charset => '"'.chr(($c / 96)+0x30)); |
| 421 |
} elsif (0xE9BB60 <= $cc && $cc <= 0xE9D861) { |
| 422 |
my $c = $cc - 0xE9BB60; |
| 423 |
$t = _i2g (chr(($c % 94)+0x21), $C, |
| 424 |
type => 'G94', charset => '#'.chr(($c / 94)+0x30)); |
| 425 |
} elsif (0xE9D8C0 <= $cc && $cc <= 0xE9F65F) { |
| 426 |
my $c = $cc - 0xE9D8C0; |
| 427 |
$t = _i2g (chr(($c % 96)+0x20), $C, |
| 428 |
type => 'G96', charset => '#'.chr(($c / 96)+0x30)); |
| 429 |
} elsif (0x70090940 <= $cc && $cc <= 0x70092641) { |
| 430 |
my $c = $cc - 0x70090940; |
| 431 |
$t = _i2g (chr(($c % 94)+0x21), $C, |
| 432 |
type => 'G94', charset => "\x20".chr(($c / 94)+0x30)); |
| 433 |
} elsif (0x700926A0 <= $cc && $cc <= 0x7009443F) { |
| 434 |
my $c = $cc - 0x700926A0; |
| 435 |
$t = _i2g (chr(($c % 96)+0x20), $C, |
| 436 |
type => 'G96', charset => "\x20".chr(($c / 96)+0x30)); |
| 437 |
## TODO: DRCS with I byte: U+700944A0-U+7009F6BF |
| 438 |
} elsif (0x70400000 <= $cc && $cc <= 0x7040FFED) { |
| 439 |
my $c = $cc - 0x70400000; |
| 440 |
$t = _i2g (chr(($c % 94)+0x21), $C, charset_id => 'P'.int ($c / 94), |
| 441 |
type => 'G94', charset => $C->{option}->{private_set}->{G94}->[ $c / 94 ]); |
| 442 |
} elsif (0x70410000 <= $cc && $cc <= 0x7041FFBF) { |
| 443 |
my $c = $cc - 0x70410000; |
| 444 |
$t = _i2g (chr(($c % 96)+0x20), $C, charset_id => 'P'.int ($c / 96), |
| 445 |
type => 'G96', charset => $C->{option}->{private_set}->{G96}->[ $c / 96 ]); |
| 446 |
} elsif (0x70420000 <= $cc && $cc <= 0x7046F19B) { |
| 447 |
my $c = $cc % 0x10000; |
| 448 |
$t = _i2g (chr((($c % 8836) / 94)+0x21).chr(($c % 94)+0x21), $C, |
| 449 |
type => 'G94n', |
| 450 |
charset_id => 'P'.int(($cc / 0x10000) - 0x7042).'_'.int($c / 8836), |
| 451 |
charset => $C->{option}->{private_set}->{G94n} |
| 452 |
->[ ($cc / 0x10000) - 0x7042 ]->[ $c / 8836 ]); |
| 453 |
} |
| 454 |
if (defined $t) { |
| 455 |
$t = _i2o ($t, $C, cs_F => "\x40") |
| 456 |
if $C->{coding_system} ne $CODING_SYSTEM{"\x40"}; |
| 457 |
} else { |
| 458 |
my $F; my @F = qw~G /G /H /I B /A /D /F~; |
| 459 |
push @F, qw~/J /K /L~ if $cc <= 0x10FFFF; |
| 460 |
push @F, qw~/@ /C /E~ if $cc <= 0xFFFF; |
| 461 |
for (@F) { |
| 462 |
if (defined $C->{option}->{designate_to}->{coding_system}->{$_} |
| 463 |
&& $C->{option}->{designate_to}->{coding_system}->{$_} > -1) { |
| 464 |
$F = $_; last; |
| 465 |
} elsif ($C->{option}->{designate_to}->{coding_system}->{default} > -1) { |
| 466 |
$F = $_; last; |
| 467 |
} |
| 468 |
} |
| 469 |
$t = _i2o ($c, $C, cs_F => $F) if $F; |
| 470 |
} |
| 471 |
if (defined $t) { |
| 472 |
$r .= $t; |
| 473 |
} else { |
| 474 |
unless ($C->{option}->{undef_char}->[0] eq "\x20") { |
| 475 |
$t = _i2g ($C->{option}->{undef_char}->[0], $C, |
| 476 |
%{ $C->{option}->{undef_char}->[1] }); |
| 477 |
} else { ## SP |
| 478 |
$t = _back2ascii ($C) . "\x20"; |
| 479 |
} |
| 480 |
$r .= $C->{coding_system} eq $CODING_SYSTEM{"\x40"} ? |
| 481 |
$t : _i2o ($t, $C, cs_F => "\x40"); |
| 482 |
} |
| 483 |
} |
| 484 |
$r . _back2ascii ($C); |
| 485 |
} |
| 486 |
|
| 487 |
## $O{charset} eq undef means that charset is same as the current designated one. |
| 488 |
sub _i2c ($%%) { |
| 489 |
my ($s, $C, %O) = @_; |
| 490 |
my $r = ''; |
| 491 |
if ($O{type} eq 'C0') { |
| 492 |
if (defined $O{charset}) { |
| 493 |
if ( $C->{C0} ne $CHARSET{C0}->{$O{charset}} |
| 494 |
&& $C->{C0} ne $CHARSET{C0}->{$O{charset_id}}) { |
| 495 |
for ($C->{option}->{designate_to}->{C0}->{$O{charset}}, |
| 496 |
$C->{option}->{designate_to}->{C0}->{default}) { |
| 497 |
if (defined $_) { return undef if $_ == -1; last } |
| 498 |
} |
| 499 |
$r .= "\x1B\x21".$O{charset}; |
| 500 |
$C->{C0} = $CHARSET{C0}->{$O{charset}}; |
| 501 |
} |
| 502 |
} elsif (defined $O{charset_id}) { |
| 503 |
if ($C->{C0} ne $CHARSET{C0}->{$O{charset_id}}) { |
| 504 |
return undef; ## Control set is not designated nor has F byte |
| 505 |
} |
| 506 |
} |
| 507 |
$r .= _back2ascii ($C, reset_all => $C->{C0}->{reset_all}->{$s}); |
| 508 |
return $r . $s; |
| 509 |
} elsif ($O{type} eq 'C1') { |
| 510 |
if (defined $O{charset}) { |
| 511 |
if ( $C->{C1} ne $CHARSET{C1}->{$O{charset}} |
| 512 |
&& $C->{C1} ne $CHARSET{C1}->{$O{charset_id}}) { |
| 513 |
for ($C->{option}->{designate_to}->{C1}->{$O{charset}}, |
| 514 |
$C->{option}->{designate_to}->{C1}->{default}) { |
| 515 |
if (defined $_) { return undef if $_ == -1; last } |
| 516 |
} |
| 517 |
$r .= "\x1B\x22".$O{charset}; |
| 518 |
$C->{C1} = $CHARSET{C1}->{$O{charset}}; |
| 519 |
} |
| 520 |
} elsif (defined $O{charset_id}) { |
| 521 |
if ($C->{C1} ne $CHARSET{C1}->{$O{charset_id}}) { |
| 522 |
return undef; ## Control set is not designated nor has F byte |
| 523 |
} |
| 524 |
} |
| 525 |
$r .= _back2ascii ($C, reset_all => $C->{C1}->{reset_all}->{$s}); |
| 526 |
unless ($C->{option}->{C1invoke_to_right}) { ## ESC Fe |
| 527 |
$s =~ s/([\x80-\x9F])/"\x1B" . pack ('C', ord ($1) - 0x40)/ge; |
| 528 |
} |
| 529 |
return $r . $s; |
| 530 |
} |
| 531 |
} |
| 532 |
sub _i2g ($%%) { |
| 533 |
my ($s, $C, %O) = @_; |
| 534 |
my $r = ''; |
| 535 |
my $set = $CHARSET{$O{type}}->{$O{charset}. |
| 536 |
($O{revision}&&$C->{option}->{use_revision}?$O{revision}:'')}; |
| 537 |
my $set0 = $CHARSET{$O{type}}->{$O{charset_id}}; |
| 538 |
## -- designate character set |
| 539 |
my $G = 0; |
| 540 |
if ($C->{G0} eq $set || $C->{G0} eq $set0) { $G = 0 } |
| 541 |
elsif ($C->{G1} eq $set || $C->{G1} eq $set0) { $G = 1 } |
| 542 |
elsif ($C->{G2} eq $set || $C->{G2} eq $set0) { $G = 2 } |
| 543 |
elsif ($C->{G3} eq $set || $C->{G3} eq $set0) { $G = 3 } |
| 544 |
else { |
| 545 |
return undef unless $set; ## charset does not have F byte |
| 546 |
$G = 1 if $O{type} eq 'G96' || $O{type} eq 'G96n'; |
| 547 |
for ($C->{option}->{designate_to}->{$O{type}}->{$O{charset}}, |
| 548 |
$C->{option}->{designate_to}->{$O{type}}->{default}) { |
| 549 |
if (defined $_) { |
| 550 |
$G = $_; last; |
| 551 |
} |
| 552 |
} |
| 553 |
if ($G == -1) { |
| 554 |
return undef; |
| 555 |
} |
| 556 |
if ($O{type} eq 'G94') { |
| 557 |
$r .= ($O{revision}&&$C->{option}->{use_revision}?"\x1B\x26".$O{revision}:'') |
| 558 |
."\x1B".("\x28","\x29","\x2A","\x2B")[$G].$O{charset}; |
| 559 |
} elsif ($O{type} eq 'G94n') { |
| 560 |
if ($G == 0 && !$C->{option}->{G94n_designate_long} |
| 561 |
&& ($O{charset} eq '@' || $O{charset} eq 'A' || $O{charset} eq 'B')) { |
| 562 |
$r .= ($O{revision}&&$C->{option}->{use_revision}?"\x1B\x26".$O{revision}:'') |
| 563 |
."\x1B\x24".$O{charset}; |
| 564 |
} else { |
| 565 |
$r .= ($O{revision}&&$C->{option}->{use_revision}?"\x1B\x26".$O{revision}:'') |
| 566 |
."\x1B\x24".("\x28","\x29","\x2A","\x2B")[$G].$O{charset}; |
| 567 |
} |
| 568 |
} elsif ($O{type} eq 'G96') { |
| 569 |
$r .= ($O{revision}&&$C->{option}->{use_revision}?"\x1B\x26".$O{revision}:'') |
| 570 |
."\x1B".("\x2C","\x2D","\x2E","\x2F")[$G].$O{charset}; |
| 571 |
} elsif ($O{type} eq 'G96n') { |
| 572 |
$r .= ($O{revision}&&$C->{option}->{use_revision}?"\x1B\x26".$O{revision}:'') |
| 573 |
."\x1B\x24".("\x2C","\x2D","\x2E","\x2F")[$G].$O{charset}; |
| 574 |
} |
| 575 |
$C->{'G'.$G} = $CHARSET{$O{type}}->{$O{charset}}; |
| 576 |
} |
| 577 |
## -- invoke G buffer |
| 578 |
my $left = $C->{option}->{Ginvoke_to_left}->[$G]; |
| 579 |
if ($C->{GL} eq 'G'.$G) { |
| 580 |
$left = 1; |
| 581 |
} elsif ($C->{GR} eq 'G'.$G) { |
| 582 |
$left = 0; |
| 583 |
} else { |
| 584 |
if ($C->{option}->{Ginvoke_by_single_shift}->[$G]) { |
| 585 |
if ($C->{C1}->{'C_SS'.$G}) { |
| 586 |
$r .= _i2c ($C->{C1}->{'C_SS'.$G}, $C, type => 'C1') || return undef; |
| 587 |
} elsif ($C->{C0}->{'C_SS'.$G}) { |
| 588 |
$r .= _i2c ($C->{C0}->{'C_SS'.$G}, $C, type => 'C0') || return undef; |
| 589 |
} else { ## Both C0 and C1 set do not have SS2/3. |
| 590 |
$left = 0 if $G == 1 && !$C->{C0}->{C_LS1}; |
| 591 |
$r .= __invoke ($C, $G => $left) if $C->{$left?'GL':'GR'} ne 'G'.$G; |
| 592 |
} |
| 593 |
} else { |
| 594 |
$left = 0 if $G == 1 && !$C->{C0}->{C_LS1}; |
| 595 |
$r .= __invoke ($C, $G => $left) if $C->{$left?'GL':'GR'} ne 'G'.$G; |
| 596 |
} |
| 597 |
} |
| 598 |
$s =~ tr/\x00-\x7F/\x80-\xFF/ unless $left; |
| 599 |
$r . $s; |
| 600 |
} |
| 601 |
sub _back2ascii (%) { |
| 602 |
my ($C, %O) = @_; |
| 603 |
my $r = ''; |
| 604 |
if ($C->{option}->{reset}->{Gdesignation}) { |
| 605 |
my $F = $C->{option}->{reset}->{Gdesignation}; # \x42 |
| 606 |
$r .= "\x1B\x28".$F unless $C->{G0} eq $CHARSET{G94}->{$F}; |
| 607 |
$C->{G0} = $CHARSET{G94}->{$F}; |
| 608 |
if ($O{reset_all}) { |
| 609 |
$C->{G1} = $CHARSET{G94}->{"\x7E"}; |
| 610 |
$C->{G2} = $CHARSET{G94}->{"\x7E"}; |
| 611 |
$C->{G3} = $CHARSET{G94}->{"\x7E"}; |
| 612 |
} |
| 613 |
} |
| 614 |
if ($C->{option}->{reset}->{Ginvoke}) { |
| 615 |
if ($C->{GL} ne 'G0') { |
| 616 |
$r .= $C->{C0}->{C_LS0} || ($C->{C0} = $CHARSET{C0}->{'@'},"\x1B\x21\x40\x0F"); |
| 617 |
$C->{GL} = 'G0'; |
| 618 |
} |
| 619 |
$C->{GR} = undef if $O{reset_all}; |
| 620 |
} |
| 621 |
$r; |
| 622 |
} |
| 623 |
## __invoke (\%C, $G, $left_or_right) |
| 624 |
sub __invoke (\%$$) { |
| 625 |
my ($C, $G) = @_; |
| 626 |
if ($_[2]) { |
| 627 |
$C->{GL} = 'G'.$G; |
| 628 |
return ($C->{C0}->{C_LS0} |
| 629 |
|| scalar ($C->{C0}=$CHARSET{C0}->{'@'},"\x1B\x21\x40\x0F"), |
| 630 |
$C->{C0}->{C_LS1}, "\x1B\x6E", "\x1B\x6F")[$G]; |
| 631 |
} else { |
| 632 |
$C->{GR} = 'G'.$G; |
| 633 |
return ("", "\x1B\x7E", "\x1B\x7D", "\x1B\x7C")[$G]; |
| 634 |
} |
| 635 |
''; |
| 636 |
} |
| 637 |
sub _i2o ($\%%) { |
| 638 |
my ($s, $C, %O) = @_; |
| 639 |
my $CS = $CODING_SYSTEM{ $O{cs_F} } || $CODING_SYSTEM{ $O{cs_id} } || return undef; |
| 640 |
my $r = ''; |
| 641 |
if ($CS ne $C->{coding_system}) { |
| 642 |
my $e = ''; |
| 643 |
$e .= "\x1B\x25"; |
| 644 |
$e .= $O{cs_F} || $C->{option}->{private_set}->{coding_system}->{ $O{cs_id} } |
| 645 |
|| return undef; |
| 646 |
if ($C->{coding_system} eq $CODING_SYSTEM{"\x2F\x40"} |
| 647 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x43"} |
| 648 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x45"} |
| 649 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x4A"} |
| 650 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x4B"} |
| 651 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x4C"}) { |
| 652 |
$e =~ s/(.)/\x00$1/go; |
| 653 |
} elsif ($C->{coding_system} eq $CODING_SYSTEM{"\x2F\x41"} |
| 654 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x44"} |
| 655 |
|| $C->{coding_system} eq $CODING_SYSTEM{"\x2F\x46"}) { |
| 656 |
$e =~ s/(.)/\x00\x00\x00$1/go; |
| 657 |
} |
| 658 |
$r .= $e; |
| 659 |
$C->{coding_system} = $CS; |
| 660 |
if ($CS->{reset_state}) { |
| 661 |
$C->{GL} = undef; $C->{GR} = undef; |
| 662 |
$C->{C0} = $CHARSET{C0}->{"\x7E"}; |
| 663 |
$C->{C1} = $CHARSET{C1}->{"\x7E"}; |
| 664 |
$C->{G0} = $CHARSET{G94}->{"\x7E"}; |
| 665 |
$C->{G1} = $CHARSET{G94}->{"\x7E"}; |
| 666 |
$C->{G2} = $CHARSET{G94}->{"\x7E"}; |
| 667 |
$C->{G3} = $CHARSET{G94}->{"\x7E"}; |
| 668 |
} |
| 669 |
} |
| 670 |
if ($CS eq $CODING_SYSTEM{"\x40"}) { |
| 671 |
# |
| 672 |
} elsif ($CS eq $CODING_SYSTEM{G} || $CS eq $CODING_SYSTEM{'/G'} |
| 673 |
|| $CS eq $CODING_SYSTEM{'/H'} || $CS eq $CODING_SYSTEM{'/I'}) { |
| 674 |
Encode::_utf8_off ($s); |
| 675 |
} elsif ($CS eq $CODING_SYSTEM{'/@'} || $CS eq $CODING_SYSTEM{'/C'} |
| 676 |
|| $CS eq $CODING_SYSTEM{'/E'}) { |
| 677 |
$s = Encode::encode ('ucs-2be', $s); |
| 678 |
} elsif ($CS eq $CODING_SYSTEM{'/A'} || $CS eq $CODING_SYSTEM{'/D'} |
| 679 |
|| $CS eq $CODING_SYSTEM{'/F'}) { |
| 680 |
$s = Encode::encode ('ucs-4be', $s); |
| 681 |
} elsif ($CS eq $CODING_SYSTEM{'/J'} || $CS eq $CODING_SYSTEM{'/K'} |
| 682 |
|| $CS eq $CODING_SYSTEM{'/L'}) { |
| 683 |
$s = Encode::encode ('UTF-16BE', $s); |
| 684 |
} elsif ($CS eq $CODING_SYSTEM{B}) { |
| 685 |
$s = Encode::encode ('utf-1', $s); |
| 686 |
} else { |
| 687 |
return undef; |
| 688 |
} |
| 689 |
$r . $s; |
| 690 |
} |
| 691 |
|
| 692 |
1; |
| 693 |
__END__ |
| 694 |
|
| 695 |
=head1 SEE ALSO |
| 696 |
|
| 697 |
ISO/IEC 646:1991, "7-bit coded graphic character set for intormation interchange". |
| 698 |
|
| 699 |
ISO/IEC 2022:1994, "Character Code Structure and Extension Techniques". |
| 700 |
(IDT with ECMA 35, JIS X 0202:1998) |
| 701 |
|
| 702 |
ISO/IEC 4873:1991, "8-Bit Coded Character Set Structure and Rules". |
| 703 |
(IDT with ECMA 43) |
| 704 |
|
| 705 |
ISO/IEC 6429:1992, "Control Functions for Coded Character Sets". |
| 706 |
(IDT with ECMA 48:1991, JIS X 0211:1998) |
| 707 |
|
| 708 |
ISO/IEC 8859, "8-Bit Single-Byte Coded Graphic Character Sets". |
| 709 |
|
| 710 |
Encode, perlunicode |
| 711 |
|
| 712 |
=head1 TODO |
| 713 |
|
| 714 |
=over 4 |
| 715 |
|
| 716 |
=item NCR (coding system other than ISO/IEC 2022) support |
| 717 |
|
| 718 |
=over 2 |
| 719 |
|
| 720 |
=item ESC 02/05 02/15 03/x of X Compound Text |
| 721 |
|
| 722 |
=back |
| 723 |
|
| 724 |
=item Output of control character sets, single control functions |
| 725 |
|
| 726 |
=item Designation sequence of control character sets (input) |
| 727 |
|
| 728 |
=item Special graphic character sets such as G3 of EUC-TW |
| 729 |
|
| 730 |
=item SUPER SHIFT (SS) invoke function of old control character set |
| 731 |
|
| 732 |
=item Safe transparent of control string (ISO/IEC 6429) |
| 733 |
|
| 734 |
=item Output of unoutputable characters as alternative notation such as SGML-like entity |
| 735 |
|
| 736 |
=item C0 set invoked to CR area like ISIRI code |
| 737 |
|
| 738 |
Really need? |
| 739 |
|
| 740 |
=item special treatment of 0x20, 0x7E, 0xA0, 0xFF |
| 741 |
|
| 742 |
For example, GB mongolian sets use MSP (MONGOLIAN SPACE) |
| 743 |
with these code positions. |
| 744 |
|
| 745 |
And, no less coding systems does not use (or does ban using) DEL. |
| 746 |
|
| 747 |
=item A lot of character sets don't have pseudo-UCS mapping. |
| 748 |
|
| 749 |
Most of 9m^n (n >= 3) sets, 9m^n sets with I byte, 9m^n |
| 750 |
DRCSes do not have pseudo-UCS mapping area. It is |
| 751 |
questionable to allocate lots of code positions to these |
| 752 |
rarely-(or no-)used character sets. |
| 753 |
|
| 754 |
=item Even character sets that have pseudo-UCS mapping, some of them can't be outputed in ISO/IEC 2022. |
| 755 |
|
| 756 |
Because output of rarely-used character sets is |
| 757 |
not implemented yet. |
| 758 |
|
| 759 |
=back |
| 760 |
|
| 761 |
=head1 AUTHORS |
| 762 |
|
| 763 |
Nanashi-san |
| 764 |
|
| 765 |
Wakaba <w@suika.fam.cx> |
| 766 |
|
| 767 |
=head1 LICENSE |
| 768 |
|
| 769 |
Copyright 2002 AUTHORS |
| 770 |
|
| 771 |
This library is free software; you can redistribute it |
| 772 |
and/or modify it under the same terms as Perl itself. |
| 773 |
|
| 774 |
=cut |
| 775 |
|
| 776 |
# $Date: 2002/10/16 10:39:35 $ |
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