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[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
99 2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
100 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
105 my ($table, $offset) = @_;
106 my $def = $table->{$offset} or return;
107 my ($len, $class, $name, $title) = @{$def};
111 $name //= $len <= 2 ? 'res' : 'reserved';
113 if (my $part = $offset/$nibsize % 16) {
115 my $cols = 16 - $part; # remaining
116 $cols = $len if $len < $cols; #TODO: optimise
118 # continued on new row
119 $table->{$offset + $nibsize*$cols} = [$len*$nibsize, "$class joinu", $name, $title];
125 elsif (my $rows = $len >> 4) {
127 if ($len -= $rows << 4) {
128 # partial row remains
129 $table->{$offset + $nibsize*$rows * 16} = [$len*$nibsize, "$class joinu", '', $title];
132 $attr .= sprintf ' rowspan=%d', $rows;
136 $attr .= sprintf ' colspan=%d', $len unless $len == 1;
137 $attr .= $1 if $class and $class =~ s/( \w+="[^"]*")//;
138 $attr .= sprintf ' class="%s"', $class if $class;
139 $attr .= sprintf ' title="%s"', EscapeHTML($title) if $title;
140 return "<td$attr>$name";
143 for my $row (@request) {
144 printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
145 printf '<caption>%s</caption>', $row->{set};
147 for my $section (qw{thead}) {
148 print "<$section><tr><th>↱";
149 print '<th>', $_ for @nibble;
153 for my $msb (0 .. (length($row->{table}) || 256) - 1 >> 4) {
154 printf '<tr><th>%X', ($msb + ($row->{offset} >> 4)) * $nibsize;
155 for my $lsb (0 .. $#nibble) {
156 my $val = ( ($msb<<4) + $lsb ) * $nibsize;
158 if (ref $row->{cell} eq 'CODE') {
159 print $row->{cell}->($val);
162 print range_cell($row->{cell}, $val);
166 my $glyph = substr $row->{table}, $val, 1;
167 if ($glyph eq $NOCHAR) {
172 print "\n".$glyphs->glyph_cell($glyph);
176 print "</table></div>\n";
183 <table class="glyphs"><tr>
184 <td class="X Cc">control
185 <td class="X Zs"><span>whitespace</span>
186 <td class="X Mn">diacritic<table class="glyphs"><tr>
187 <td class="X Sk">letter
189 <td class="X Po">punctuation<table class="glyphs"><tr>
190 <td class="X Pf">quote
192 <td class="X So">symbol<table class="glyphs"><tr>
193 <td class="X Sm">math
194 <td class="X Sc">currency
196 <td class="X No">numeric
197 <td class="X Greek">greek<table class="glyphs"><tr>
198 <td class="X Latin">latin
199 <td class="X Cyrillic">cyrillic
201 <td class="X Aramaic">aramaic<table class="glyphs"><tr>
202 <td class="X Brahmic">brahmic
203 <td class="X Arabic">arabic
205 <td class="X Syllabic">syllabic<table class="glyphs"><tr>
206 <td class="X African">african
207 <td class="X Hiragana">japanese
208 <td class="X Han">cjk
209 <td class="X Bopomofo">chinese
211 <td class="X Alpha">alphabetic
214 <table class="glyphs"><tr>
215 <td class="X">unicode 7.0
216 <td class="X Xr">proposed
217 <td class="X Xd">deprecated
218 <td class="">unassigned
219 <td class="X Xi">invalid