4 title => 'charset cheat sheet',
7 "Reference sheet with all glyphs in common character encoding tables,",
8 "and an overview of Unicode ranges and UTF-8 bytes.",
11 charset codepage unicode ascii utf8 latin glyph character encoding
12 reference common overview table
14 stylesheet => [qw'light'],
15 data => [qw'charset-unicode.inc.pl charset-utf8.inc.pl'],
19 <h1>Character encoding</h1>
22 use Shiar_Sheet::FormatChar;
23 my $glyphs = Shiar_Sheet::FormatChar->new;
24 my @nibble = (0..9, 'A'..'F');
27 use Encode qw(decode resolve_alias);
28 # generate character table(s)
29 # (~16x faster than decoding in loop;
30 # substr strings is twice as fast as splitting to an array)
32 # default => [qw(unicode utf-8 iso-8859-1 cp437 -cp1252- --iso-8859-15- -koi8-f)],
33 default => [qw(unicode- utf-8 iso-8859-1 -cp1252- --iso-8859-15- cp437 -cp850)],
34 0 => [qw(cp437 cp863)],
35 1 => [qw(iso-8859-1 cp1252 MacRoman cp850)],
36 2 => [qw(iso-8859-2 cp1250 cp852 MacCentralEurRoman MacCroatian MacRumanian)],
37 5 => [qw(koi8-f iso-8859-5 cp1251 MacCyrillic cp855 cp866)],
38 7 => [qw(iso-8859-7 cp1253 MacGreek cp737 cp869)],
39 8 => [qw(iso-8859-8 cp1255 MacHebrew cp862)],
43 my %row = (offset => 0);
45 if ($input =~ s/^--//) {
46 $row{offset} = $endpoint > 160 ? 160 : 48;
48 elsif ($input =~ s/^-//) {
49 $row{offset} = $endpoint > 128 ? 128 : 32;
51 if ($input =~ s/-$//) {
52 $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
55 if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
56 my $start = hex($1) << ($2 ? 4 : 8);
57 my $end = $2 ? hex($2) << 4 : $start + 240;
58 $row{table} = join '', map { chr } $start .. $end+15;
59 utf8::upgrade($row{table}); # prevent latin1 output
60 $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
62 elsif ($input eq 'U') {
63 $row{table} = ' ' x 1024;
64 $row{set} = 'Unicode planes';
65 $row{cell} = do 'charset-ucplanes.inc.pl';
66 @nibble = (map { $_.0, $_.8 } 0 .. 7);
69 elsif ($row{set} = resolve_alias($input)) {
70 if ($row{set} eq 'Internal') {
71 $row{table} = ' ' x ($endpoint < 255 ? 640 : 8192);
72 $row{set} = 'Unicode BMP';
73 $row{cell} = do 'charset-unicode.inc.pl';
75 elsif ($row{set} eq 'utf-8-strict') {
78 $row{cell} = do 'charset-utf8.inc.pl';
81 $row{table} = decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
85 print "<p>Encoding $input unknown</p>\n";
92 } map { defined $ALIAS{$_} ? @{ $ALIAS{$_} } : $_ }
93 $ENV{PATH_INFO} =~ /\w/ ? split(m{[/+\s]}, $ENV{PATH_INFO}) : 'default';
94 my $NOCHAR = chr 0xFFFD;
96 for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
97 substr($request[$cp437]->{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
98 substr($request[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
99 2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
100 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
104 for my $row (@request) {
105 printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
106 printf '<caption>%s</caption>', $row->{set};
108 for my $section (qw{thead}) {
109 print "<$section><tr><th>↱";
110 print '<th>', $_ for @nibble;
114 for my $msb (0 .. (length($row->{table}) || 256) - 1 >> 4) {
115 printf '<tr><th>%X', $msb + ($row->{offset} >> 4);
116 for my $lsb (0 .. $#nibble) {
117 my $val = ( ($msb<<4) + $lsb ) * $nibsize;
119 print $row->{cell}->($val);
123 my $glyph = substr $row->{table}, $val, 1;
124 if ($glyph eq $NOCHAR) {
129 print "\n".$glyphs->glyph_cell($glyph);
133 print "</table></div>\n";
140 <table class="glyphs"><tr>
141 <td class="X Cc">control
142 <td class="X Zs"><span>whitespace</span>
143 <td class="X Mn">diacritic<table class="glyphs"><tr>
144 <td class="X Sk">letter
146 <td class="X Po">punctuation<table class="glyphs"><tr>
147 <td class="X Pf">quote
149 <td class="X So">symbol<table class="glyphs"><tr>
150 <td class="X Sm">math
151 <td class="X Sc">currency
153 <td class="X No">numeric
154 <td class="X Greek">greek<table class="glyphs"><tr>
155 <td class="X Latin">latin
156 <td class="X Cyrillic">cyrillic
158 <td class="X Aramaic">aramaic<table class="glyphs"><tr>
159 <td class="X Brahmic">brahmic
160 <td class="X Arabic">arabic
162 <td class="X Syllabic">syllabic<table class="glyphs"><tr>
163 <td class="X African">african
164 <td class="X Hiragana">japanese
165 <td class="X Han">cjk
166 <td class="X Bopomofo">chinese
168 <td class="X Alpha">alphabetic
171 <table class="glyphs"><tr>
172 <td class="X">unicode 7.0
173 <td class="X Xr">proposed
174 <td class="X Xd">deprecated
175 <td class="">unassigned
176 <td class="X Xi">invalid