charset.plp

   1 <(common.inc.plp)><:
   2         our $VERSION = 'v1.0';
   3
   4 :><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   5  "http://www.w3.org/TR/html4/loose.dtd">
   6 <html lang="en">
   7
   8 <head>
   9 <meta http-equiv="content-type" content="<:= $header{content_type} :>">
  10 <title>charset cheat sheet</title>
  11 <meta name="description" content="Reference sheet with all glyphs in common character encoding tables, and an overview of Unicode ranges and UTF-8 bytes.">
  12 <meta name="keywords" content="charset, codepage, unicode, ascii, utf8, latin, glyph, character, encoding, reference, common, overview, table">
  13 <:= stylesheet(qw'light') :>
  14 <link rel="icon" type="image/png" href="/clip.png">
  15 </head>
  16
  17 <body id="charset">
  18 <h1>Character encoding</h1>
  19
  20 <:
  21 my $diinfo = do 'digraphs.inc.pl';
  22 my %di = map { $diinfo->{$_}->[0] => $_ } grep { ref $diinfo->{$_} }
  23         keys %$diinfo;
  24
  25 use Encode qw(decode resolve_alias);
  26 # generate character table(s)
  27 # (~16x faster than decoding in loop;
  28 #  substr strings is twice as fast as splitting to an array)
  29 my %ALIAS = (
  30 #       default => [qw(unicode utf-8 iso-8859-1 cp437 -cp1252- --iso-8859-15- -koi8-f)],
  31         default => [qw(unicode- utf-8 iso-8859-1 -cp1252- --iso-8859-15- cp437 -cp850)],
  32         0 => [qw(cp437 cp863)],
  33         1 => [qw(iso-8859-1 cp1252 MacRoman cp850)],
  34         2 => [qw(iso-8859-2 cp1250 cp852 MacCentralEurRoman MacCroatian MacRumanian)],
  35         5 => [qw(koi8-f iso-8859-5 cp1251 MacCyrillic cp855 cp866)],
  36         7 => [qw(iso-8859-7 cp1253 MacGreek cp737 cp869)],
  37         8 => [qw(iso-8859-8 cp1255 MacHebrew cp862)],
  38 );
  39 my @request = map {
  40         if (my $input = $_) {
  41                 my %row = (offset => 0);
  42                 my $endpoint = 255;
  43                 if ($input =~ s/^--//) {
  44                         $row{offset} = $endpoint > 160 ? 160 : 48;
  45                 }
  46                 elsif ($input =~ s/^-//) {
  47                         $row{offset} = $endpoint > 128 ? 128 : 32;
  48                 }
  49                 if ($input =~ s/-$//) {
  50                         $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
  51                 }
  52
  53                 if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
  54                         my $start = hex($1) << ($2 ? 4 : 8);
  55                         my $end = $2 ? hex($2) << 4 : $start + 240;
  56                         $row{table} = join '', map { chr } $start .. $end+15;
  57                         utf8::upgrade($row{table});  # prevent latin1 output
  58                         $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
  59                 }
  60                 elsif ($input eq 'U') {
  61                         $row{table} = ' ' x 512;
  62                         $row{set} = 'Unicode planes';
  63                         $row{cell} = do 'charset-ucplanes.inc.pl';
  64                 }
  65                 elsif ($row{set} = resolve_alias($input)) {
  66                         if ($row{set} eq 'Internal') {
  67                                 $row{table} = ' ' x ($endpoint < 255 ? 640 : 4096);
  68                                 $row{set} = 'Unicode BMP';
  69                                 $row{cell} = do 'charset-unicode.inc.pl';
  70                         }
  71                         elsif ($row{set} eq 'utf-8-strict') {
  72                                 $row{table} = undef;
  73                                 $row{set} = 'UTF-8';
  74                                 $row{cell} = do 'charset-utf8.inc.pl';
  75                         }
  76                         else {
  77                                 $row{table} = decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
  78                         }
  79                 }
  80                 else {
  81                         print "<p>Encoding $input unknown</p>\n";
  82                 }
  83                 \%row;
  84         }
  85         else {
  86                 ();
  87         }
  88 } map { defined $ALIAS{$_} ? @{ $ALIAS{$_} } : $_ }
  89         $ENV{PATH_INFO} =~ /\w/ ? split(m{[/+\s]}, $ENV{PATH_INFO}) : 'default';
  90 my $NOCHAR = chr 0xFFFD;
  91
  92 for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
  93         substr($request[$cp437]->{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
  94         substr($request[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
  95                 2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
  96                 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
  97         );
  98 }
  99
 100 my @nibble = (0..9, 'A'..'F');
 101 for my $row (@request) {
 102         printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
 103         printf '<caption>%s</caption>', $row->{set};
 104         print '<col>' x 17;
 105         for my $section (qw{thead}) {
 106                 print "<$section><tr><th>↱";
 107                 print '<th>', $_ for @nibble;
 108                 print "\n";
 109         }
 110         print '<tbody>';
 111         for my $msb (0 .. (length($row->{table}) || 256) - 1 >> 4) {
 112                 printf '<tr><th>%X', $msb + ($row->{offset} >> 4);
 113                 for my $lsb (0 .. $#nibble) {
 114                         if ($row->{cell}) {
 115                                 print $row->{cell}->(($msb<<4) + $lsb);
 116                                 next;
 117                         }
 118
 119                         my $glyph = substr $row->{table}, ($msb<<4) + $lsb, 1;
 120                         if ($glyph eq $NOCHAR) {
 121                                 print '<td>';
 122                                 next;
 123                         }
 124
 125                         my $info = [ord $glyph];
 126                         if (defined (my $mnem = $di{ord $glyph})) {
 127                                 $info = $diinfo->{$mnem};
 128                         }
 129                         else {
 130                                 require Unicode::UCD;
 131                                 my $fullinfo = Unicode::UCD::charinfo(ord $glyph);
 132                                 $info = [@$fullinfo{qw/code name category script string/}] if $fullinfo;
 133                         }
 134                         my ($codepoint, $name, $prop, $script, $string) = @$info;
 135
 136                         $glyph = EscapeHTML($string || $glyph);
 137                         my $desc = sprintf 'U+%04X%s', $codepoint, $name && " ($name)";
 138                         my @class = ('X', grep {$_} $prop, $script);
 139
 140                         $glyph = "<span>$glyph</span>" if $prop eq 'Zs';
 141
 142                         printf "\n".'<td class="%s" title="%s">%s',
 143                                 join(' ', @class), EscapeHTML($desc), $glyph;
 144                 }
 145                 print "\n";
 146         }
 147         print "</table></div>\n";
 148 }
 149
 150 :>
 151 <hr>
 152
 153 <div class="legend">
 154         <table class="glyphs"><tr>
 155         <td class="X Cc">control
 156         <td class="X Zs"><span>whitespace</span>
 157         <td class="X Mn">diacritic<table class="glyphs"><tr>
 158                 <td class="X Sk">letter
 159                 </table>
 160         <td class="X Po">punctuation<table class="glyphs"><tr>
 161                 <td class="X Pf">quote
 162                 </table>
 163         <td class="X So">symbol<table class="glyphs"><tr>
 164                 <td class="X Sm">math
 165                 <td class="X Sc">currency
 166                 </table>
 167         <td class="X No">numeric
 168         <td class="X Greek">greek<table class="glyphs"><tr>
 169                 <td class="X Latin">latin
 170                 <td class="X Cyrillic">cyrillic
 171                 </table>
 172         <td class="X Aramaic">aramaic<table class="glyphs"><tr>
 173                 <td class="X Brahmic">brahmic
 174                 <td class="X Arabic">arabic
 175                 </table>
 176         <td class="X Syllabic">syllabic<table class="glyphs"><tr>
 177                 <td class="X African">african
 178                 <td class="X Hiragana">japanese
 179                 <td class="X Han">cjk
 180                 <td class="X Bopomofo">chinese
 181                 </table>
 182         <td class="X Alpha">alphabetic
 183         </table>
 184
 185         <table class="glyphs"><tr>
 186         <td class="X">unicode 5.0
 187         <td class="X Xr">proposed
 188         <td class="X Xd">deprecated
 189         <td class="">unassigned
 190         <td class="X Xi">invalid
 191         </table>
 192 </div>
 193
 194 <p class="footer">
 195         <a href="/" rel="home">sheet.shiar.nl</a>/charset.<a href="/source/charset.plp"
 196          rel="code" title="Written in Perl">plp</a>
 197         <a href="http://git.shiar.nl/sheet.git/history/HEAD:/charset.plp"
 198          rel="vcs-git" title="Git repository"><:= $VERSION :></a>
 199         created by <a href="http://shiar.nl/" rel="author">Shiar</a> •
 200         <a href="http://www.fsf.org/licensing/licenses/agpl-3.0.html" rel="copyright"
 201          title="Licensed under the GNU Affero General Public License, version 3">AGPLv3</a>
 202 </p>
 203
 204 </html>