charset.plp

   1 <(common.inc.plp)><:
   2
   3 Html({
   4         title => 'charset cheat sheet',
   5         version => '1.0',
   6         description => [
   7                 "Reference sheet with all glyphs in common character encoding tables,",
   8                 "and an overview of Unicode ranges and UTF-8 bytes.",
   9         ],
  10         keywords => [qw'
  11                 charset codepage unicode ascii utf8 latin glyph character encoding
  12                 reference common overview table
  13         '],
  14         stylesheet => [qw'light'],
  15         data => [qw'charset-unicode.inc.pl charset-utf8.inc.pl'],
  16 });
  17
  18 my @tablist = split /[^\w-]+/, $Request || 'default';
  19
  20 :>
  21 <h1>Character encoding</h1>
  22
  23 <:
  24 use POSIX qw( ceil );
  25 use Shiar_Sheet::FormatChar;
  26 my $glyphs = Shiar_Sheet::FormatChar->new;
  27 my @request;
  28
  29 sub tabinput {
  30         # generate character table(s)
  31         my $input = shift or return;
  32
  33         state $ALIAS = {
  34                 default    => [qw( unicode+0-639 utf-8 iso-8859-1 iso-8859-15 cp1252 cp437 cp850 )],
  35                 us         => [qw( cp437 cp863 AdobeStandardEncoding gsm0338 )],
  36                 ebcdic     => [qw( cp37 cp500 cp875 cp1026 cp1047 posix-bc )],
  37                 iso        => [map {"iso-8859-$_"} 1 .. 11, 13 .. 16],
  38                 dos        => [qw( cp437 cp865 cp861 cp860 cp863 cp850 cp857 cp852 cp775
  39                                    cp737 cp869 cp866 cp855 cp862 cp864 )],
  40                 aix        => [qw( cp1006 )],
  41                 win        => [qw( cp1252 cp1250 cp1254 cp1257 cp1258 cp1253 cp1251 cp1255 cp1256 cp874 )],
  42
  43                 westeur    => [qw( iso-8859-1 iso-8859-15 cp1252 iso-8859-14 cp850 hp-roman8 nextstep MacRoman )],
  44                 centeur    => [qw( iso-8859-2 iso-8859-16 cp1250 cp852 MacRomanian MacCroatian MacCentralEurRoman )], # MacRumanian only for DB
  45                 turkish    => [qw( iso-8859-9 iso-8859-3 cp1254 cp857 MacTurkish )],
  46                 baltic     => [qw( iso-8859-4 iso-8859-13 cp1257 cp775 )],
  47                 nordic     => [qw( iso-8859-10 cp865 cp861 MacIcelandic MacSami )],
  48                 cyrillic   => [qw( koi8-r koi8-u koi8-f iso-8859-5 cp1251 MacCyrillic cp866 cp855 )], # MacUkrainian is broken
  49                 arabic     => [qw( iso-8859-6 cp1006 cp864 cp1256 MacArabic )], # MacFarsi same as MacArabic?
  50                 greek      => [qw( iso-8859-7 cp1253 MacGreek cp737 cp869 )],
  51                 hebrew     => [qw( iso-8859-8 cp1255 MacHebrew cp862 )],
  52                 thai       => [qw( iso-8859-11 cp874 MacThai )],
  53                 vietnamese => [qw( viscii cp1258 MacVietnamese )],
  54                 symbol     => [qw( symbol dingbats MacDingbats AdobeZdingbat AdobeSymbol )],
  55                 # iso-code shorthand
  56                 1 => 'westeur',
  57                 2 => 'centeur',
  58                 3 => 'turkish',
  59                 4 => 'baltic',
  60                 5 => 'cyrillic',
  61                 6 => 'arabic',
  62                 7 => 'greek',
  63                 8 => 'hebrew',
  64                 9 => 'turkish',
  65                 10 => 'nordic',
  66                 11 => 'thai',
  67         };
  68         if (my $follow = $ALIAS->{$input}) {
  69                 tabinput($_) for ref $follow ? @{$follow} : $follow;
  70                 return;
  71         }
  72
  73         state $visible = {};  # all present tables
  74         my %row = (offset => 0, cols => 16);
  75         my $endpoint = 255;
  76         my $params = $input =~ s/[+](.*)\z// ? $1 : undef;
  77
  78         if (not defined $params) {
  79                 use List::Util qw( first pairfirst pairs );
  80
  81                 state $INHERIT = {
  82                         'cp437'       => ['cp850' => 0], # ascii range overridden later
  83                         'gsm0338'     => ['ascii' => '0-127'],
  84
  85                         'iso-8859-2'  => ['iso-8859-1' => '160'],
  86                         'iso-8859-3'  => ['iso-8859-1' => '160'],
  87                         'iso-8859-4'  => ['iso-8859-2' => '160'],
  88                         'iso-8859-5'  => ['iso-8859-1' => '160'],
  89                         'iso-8859-6'  => ['iso-8859-1' => '160'],
  90                         'iso-8859-7'  => ['iso-8859-1' => '160'],
  91                         'iso-8859-8'  => ['iso-8859-1' => '160'],
  92                         'iso-8859-9'  => ['iso-8859-1' => '208'],
  93                         'iso-8859-10' => ['iso-8859-4' => '160'],
  94                         'iso-8859-11' => ['iso-8859-1' => '160'],
  95                         'iso-8859-13' => ['iso-8859-4' => '160'],
  96                         'iso-8859-14' => ['iso-8859-1' => '160'],
  97                         'iso-8859-15' => ['iso-8859-1' => '160-191'],
  98                         'iso-8859-16' => ['iso-8859-2' => '160'],
  99                         'hp-roman8'   => ['iso-8859-1' => '160'],
 100
 101                         'cp1252'      => ['iso-8859-1' => '128-159'],
 102                         'cp1250'      => ['iso-8859-2' => '128-191', 'cp1252' => '128'],
 103                         'cp1254'      => ['iso-8859-9' => '128-159', 'cp1252' => '128'],
 104                         'cp874'       => ['iso-8859-11' => '128-159', 'cp1252' => '128'], # windows-874 actually cp1162
 105                         'cp1257'      => ['iso-8859-13' => '128', 'cp1252' => '128'],
 106                         'cp1251'      => ['cp1252' => '128'],
 107                         'cp1253'      => ['cp1252' => '128'],
 108                         'cp1255'      => ['iso-8859-8' => '128-223', 'cp1252' => '128'],
 109                         'cp1256'      => ['cp1252' => '128'],
 110                         'cp1258'      => ['cp1252' => '128'],
 111
 112                         'cp850'       => ['cp437' => '144'],
 113                         'cp860'       => ['cp437' => '128-175'],
 114                         'cp861'       => ['cp865' => '128-175'],
 115                         'cp863'       => ['cp437' => '128-175'],
 116                         'cp865'       => ['cp437' => '144-175'],
 117                         'cp852'       => ['cp850' => '128', 'cp437' => '128'],
 118                         'cp857'       => ['cp850' => '128-239', 'cp437' => '128'],
 119                         'cp775'       => ['cp850' => '128'],  # partial cp437
 120                         'cp866'       => ['cp437' => '128'],
 121                         'cp855'       => ['cp437' => '128'],
 122                         'cp1006'      => ['cp437' => '128'],
 123                         'cp737'       => ['cp437' => '128'],
 124                         'cp869'       => ['cp437' => '128'],
 125                         'cp862'       => ['cp437' => '128'],
 126                         'cp864'       => ['cp437' => '128'],
 127
 128                         'koi8-u'      => ['koi8-r' => 128],
 129                         'koi8-f'      => ['koi8-u' => 128],
 130
 131                         'MacRomanian' => ['MacRoman' => '160'],
 132                         'MacCroatian' => ['MacRoman' => '160'],
 133                         'MacCentralEurRoman' => ['MacRoman' => '128'],
 134                         'MacTurkish'  => ['MacRoman' => '208-223'], # F5 is unassigned
 135                         'MacCyrillic' => ['MacRoman' => '128'],
 136                         'MacHebrew'   => ['MacRoman' => '128'],
 137                 };
 138
 139                 my @parents = @{ $INHERIT->{$input} || [] };
 140
 141                 if (my ($parent, $part) = pairfirst { defined $visible->{$a} } @parents) {
 142                         $row{parent} = $parent;
 143                         $params = $part;
 144                         $params = 128 unless $visible->{$parent}
 145                                 or ($input eq 'MacCroatian' and defined $visible->{MacRomanian});
 146                 }
 147                 elsif (defined $visible->{ascii}) {
 148                         $row{parent} = $parents[0];
 149                         $params = $parents[1] || 128;
 150                         $params = 128 if $params >= 128;  # ascii offset at most
 151                 }
 152                 elsif (@parents) {
 153                         $row{parent} = $parents[0];
 154                 }
 155                 $visible->{$_} //= 0 for $row{parent};
 156         }
 157
 158         if (defined $params and $params =~ m/^ (\d+) (-\d+)? /x) {
 159                 $row{offset} = $1;
 160                 $endpoint = -$2 if $2;
 161         }
 162
 163         if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
 164                 my $start = hex($1) << ($2 ? 4 : 8);
 165                 my $end = $2 ? hex($2) << 4 : $start + 240;
 166                 $row{table} = join '', map { chr } $start .. $end+15;
 167                 utf8::upgrade($row{table});  # prevent latin1 output
 168                 $row{endpoint} = $end + 14 - $start;
 169                 $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
 170         }
 171         elsif ($input eq 'U') {
 172                 $row{set} = 'Unicode planes';
 173                 $row{cell} = do 'charset-ucplanes.inc.pl'
 174                         or Alert('Table data could not be read', $@ || $!);
 175                 $row{cols} *= 2;
 176                 $row{endpoint} = 1023 * $row{cell}->{colsize};
 177         }
 178         elsif ($row{set} = Encode::resolve_alias($input)) {
 179                 if ($row{set} eq 'Internal') {
 180                         $row{set} = 'Unicode BMP';
 181                         $row{cell} = do 'charset-unicode.inc.pl'
 182                                 or Alert('Table data could not be read', $@ || $!);
 183                         $row{endpoint} = ($endpoint || 8191) * $row{cell}->{colsize};
 184                 }
 185                 elsif ($row{set} eq 'utf-8-strict') {
 186                         $row{set} = 'UTF-8';
 187                         $row{cell} = do 'charset-utf8.inc.pl'
 188                                 or Alert('Table data could not be read', $@ || $!);
 189                         $row{endpoint} = 255;
 190                 }
 191                 else {
 192                         if ($row{set} eq 'MacHebrew') {
 193                                 # array of possibly multiple characters per code point
 194                                 $row{table} = [
 195                                         map { Encode::decode($row{set}, pack 'C*', $_) } $row{offset} .. $endpoint
 196                                 ];
 197                         }
 198                         else {
 199                                 # ~16x faster than decoding in loop;
 200                                 # substr strings is twice as fast as splitting to an array
 201                                 $row{table} = Encode::decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
 202                         }
 203                         $row{endpoint} = $endpoint - $row{offset};
 204
 205                         if ($row{set} eq 'cp437' and !$row{offset}) {
 206                                 substr($row{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
 207                                 substr($row{table}, 0, 32) = pack 'U*', map {hex} qw(
 208                                         2007 263A 263B 2665 2666 2663 2660 2022
 209                                         25D8 25CB 25D9 2642 2640 266A 266B 263C
 210                                         25BA 25C4 2195 203C 00B6 00A7 25AC 21A8
 211                                         2191 2193 2192 2190 221F 2194 25B2 25BC
 212                                 );
 213                         }
 214
 215                         $visible->{ascii} =  # assume common base
 216                         $visible->{ $row{set} } = 1;
 217                 }
 218         }
 219         else {
 220                 Alert("Encoding <q>$input</q> unknown");
 221                 return;
 222         }
 223         push @request, \%row;
 224 }
 225 tabinput($_) for @tablist;
 226
 227 my $NOCHAR = chr 0xFFFD;
 228
 229 sub range_cell {
 230         my ($info, $offset) = @_;
 231         my $table = $info->{cell} or return;
 232         my $def = $table->{$offset} or return;
 233         my ($len, $class, $name, $title) = @{$def};
 234
 235         my $cols = $info->{cols};
 236         my $colsize = $table->{colsize} || 1;
 237         my $attr = '';
 238         $len /= $colsize;
 239         $name //= $len <= 2 ? 'res' : 'reserved';
 240
 241         if (my $part = $offset/$colsize % $cols) {
 242                 # continued row
 243                 my $rest = $cols - $part;  # remaining
 244                 $rest = $len if $len < $rest; #TODO: optimise
 245                 if ($len -= $rest) {
 246                         # continued on new row
 247                         my @next = ($len * $colsize, "$class joinu");
 248                         if ($len > $rest) {
 249                                 # minority remains
 250                                 push @next, $name, $title;
 251                                 $title ||= $name;
 252                                 $name = '';
 253                         }
 254                         else {
 255                                 # minority on next row
 256                                 push @next, '"', $title || $name;
 257                         }
 258                         $table->{$offset + $colsize*$rest} //= \@next;
 259                         $class .= ' joind';
 260                 }
 261                 $len = $rest;
 262         }
 263         elsif (my $rows = int($len / $cols)) {
 264                 # multiple full rows
 265                 if ($len -= $rows * $cols) {
 266                         # partial row remains
 267                         $table->{$offset + $colsize*$rows * $cols} //= [$len*$colsize, "$class joinu", '', $title];
 268                         $class .= ' joind';
 269                 }
 270                 $attr .= sprintf ' rowspan=%d', $rows;
 271                 $len = $cols;
 272         }
 273
 274         $attr .= sprintf ' colspan=%d', $len unless $len == 1;
 275         $attr .= $1 if $class and $class =~ s/( \w+="[^"]*")//;
 276         $attr .= sprintf ' class="%s"', $class if $class;
 277         $attr .= sprintf ' title="%s"', EscapeHTML($title) if $title;
 278         return "<td$attr>$name";
 279 }
 280
 281 for my $row (@request) {
 282         my $cols = $row->{cols};
 283         my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
 284         my $coldigits = ceil(log($colsize * $cols) / log(16));  # uniform length of hexadecimal header
 285         my $rowdiv = 16 ** $coldigits;  # row divide for column digits
 286         $rowdiv = 1 if $rowdiv != $cols * $colsize;  # divide only if all columns are matched
 287         my $offset = 0;
 288
 289         printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
 290         my $title = $row->{set};
 291         $title .= " <aside>(over $_)</aside>"
 292                 for grep { $_ ne 'iso-8859-1' } $row->{parent} // ();
 293         printf '<caption>%s</caption>', $title;
 294         print '<col>' x ($cols + 1);
 295         for my $section (qw{thead}) {
 296                 print "<$section><tr><th>", $rowdiv == 1 ? '+' : '↱';
 297                 printf '<th>%0*X', $coldigits, $_ * $colsize for 0 .. $cols - 1;
 298                 print "\n";
 299         }
 300         print '<tbody>';
 301         while ($offset < $row->{endpoint}) {
 302                 print '<tr><th>';
 303                 {
 304                         if (my $rowmod = $offset % $rowdiv) {
 305                                 # offset in column units
 306                                 printf '<small>+%X</small>', $rowmod;
 307                         }
 308                         else {
 309                                 # divided row offset
 310                                 printf '%X', ($offset + $row->{offset}) / $rowdiv;
 311                         }
 312                 }
 313                 for (1 .. $cols) {
 314                         if ($row->{cell}) {
 315                                 print range_cell($row, $offset);
 316                                 next;
 317                         }
 318
 319                         my $glyph = ref $row->{table} eq 'ARRAY' ? $row->{table}->[$offset] :
 320                                 substr $row->{table}, $offset, 1;
 321                         if ($glyph eq $NOCHAR) {
 322                                 print '<td>';
 323                                 next;
 324                         }
 325
 326                         if (exists $get{compare}) {
 327                                 state $visible = {};
 328                                 my $cp = $offset + $row->{offset};
 329                                 printf '<td class="%s" title="%3$s">%2$s',
 330                                         $cp == ord $glyph ? 'l4' :
 331                                         $row->{parent} && $glyph eq
 332                                                 Encode::decode($row->{parent}, pack 'C', $cp) ? 'l3' :
 333                                         $visible->{$glyph} ? 'l2' :
 334                                         'l1',
 335                                         $glyphs->glyph_html($glyph);
 336                                 $visible->{$glyph}++;
 337                                 next;
 338                         }
 339
 340                         print "\n".$glyphs->glyph_cell($glyph);
 341                 }
 342                 continue {
 343                         $offset += $colsize;
 344                 }
 345                 print "\n";
 346         }
 347         say '</table></div>';
 348 }
 349
 350 :>
 351 <hr>
 352
 353 <div class="legend">
 354         <table class="glyphs"><tr><: if (exists $get{compare}) { :>
 355         <td class="X l4">unicode
 356         <td class="X l3">inherited
 357         <td class="X l2">existing
 358         <td class="X l1">original
 359         <td class="">unassigned
 360 <: } else { :>
 361         <td class="X Cc">control
 362         <td class="X Zs"><span>whitespace</span>
 363         <td class="X Mn">diacritic<table class="glyphs"><tr>
 364                 <td class="X Sk">letter
 365                 </table>
 366         <td class="X Po">punctuation<table class="glyphs"><tr>
 367                 <td class="X Pf">quote
 368                 </table>
 369         <td class="X So">symbol<table class="glyphs"><tr>
 370                 <td class="X Sm">math
 371                 <td class="X Sc">currency
 372                 </table>
 373         <td class="X No">numeric
 374         <td class="X Greek">greek<table class="glyphs"><tr>
 375                 <td class="X Latin">latin
 376                 <td class="X Cyrillic">cyrillic
 377                 </table>
 378         <td class="X Aramaic">aramaic<table class="glyphs"><tr>
 379                 <td class="X Brahmic">brahmic
 380                 <td class="X Arabic">arabic
 381                 </table>
 382         <td class="X Syllabic">syllabic<table class="glyphs"><tr>
 383                 <td class="X African">african
 384                 <td class="X Hiragana">japanese
 385                 <td class="X Han">cjk
 386                 <td class="X Bopomofo">chinese
 387                 </table>
 388         <td class="X Alpha">alphabetic
 389         </table>
 390
 391         <table class="glyphs"><tr>
 392         <td class="X">unicode 7.0
 393         <td class="X Xr">proposed
 394         <td class="X Xd">deprecated
 395         <td class="">unassigned
 396         <td class="X Xi">invalid
 397 <: } :> </table>
 398 </div>
 399