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'],
18 my @tablist = split /[^\w-]+/, $Request || 'default';
21 <h1>Character encoding</h1>
25 use Shiar_Sheet::FormatChar;
26 my $glyphs = Shiar_Sheet::FormatChar->new;
29 # generate character table(s)
30 my $input = shift or return;
33 default => [qw(unicode- utf-8 iso-8859-1 -cp1252-- --iso-8859-15-- cp437 -cp850)],
34 us => [qw( cp437 -cp863 AdobeStandardEncoding gsm0338-- )],
35 ebcdic => [qw( cp37 cp500 cp875 cp1026 cp1047 posix-bc )],
36 westeur => [qw( iso-8859-1 --iso-8859-15-- -cp1252-- --iso-8859-14 -cp850 -MacRoman -nextstep --hp-roman8 )],
37 centeur => [qw( iso-8859-2 --iso-8859-16 -cp1250 -cp852 -MacCentralEurRoman -MacCroatian -MacRomanian )], # MacRumanian only for DB
38 turkish => [qw( iso-8859-3 -iso-8859-9 -cp857 -cp1254 -MacTurkish )],
39 baltic => [qw( iso-8859-4 --iso-8859-13 -cp775 -cp1257 )],
40 nordic => [qw( iso-8859-10 -cp865 --cp861-- -MacIcelandic --MacSami )],
41 cyrillic => [qw( koi8-f -koi8-r- --koi8-u- -iso-8859-5 -cp1251 -MacCyrillic -cp855 -cp866 )], # MacUkrainian is broken
42 arabic => [qw( iso-8859-6 --cp1006 -cp864 -cp1256 MacArabic )], # MacFarsi same as MacArabic?
43 greek => [qw( iso-8859-7 -cp1253 -MacGreek -cp737 -cp869 )],
44 hebrew => [qw( iso-8859-8 -cp1255 -MacHebrew -cp862 )],
45 thai => [qw( iso-8859-11 -cp874-- -MacThai )],
46 vietnamese => [qw( viscii cp1258 MacVietnamese )],
47 symbol => [qw( symbol dingbats MacDingbats AdobeZdingbat AdobeSymbol )],
61 if (my $follow = $ALIAS->{$input}) {
62 return map { tabinput($_) } ref $follow ? @{$follow} : $follow;
65 my %row = (offset => 0, cols => 16);
67 if ($input =~ s/^--//) {
68 $row{offset} = $endpoint > 160 ? 160 : 48;
70 elsif ($input =~ s/^-//) {
71 $row{offset} = $endpoint > 128 ? 128 : 32;
73 if ($input =~ s/--$//) {
74 $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
76 elsif ($input =~ s/-$//) {
80 $row{setnote} = 'over cp437' if $input eq 'cp850';
81 $row{setnote} = 'over iso-8859-1' if $input =~ /^iso-8859-|^cp125/;
84 if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
85 my $start = hex($1) << ($2 ? 4 : 8);
86 my $end = $2 ? hex($2) << 4 : $start + 240;
87 $row{table} = join '', map { chr } $start .. $end+15;
88 utf8::upgrade($row{table}); # prevent latin1 output
89 $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
91 elsif ($input eq 'U') {
92 $row{table} = ' ' x 1024;
93 $row{set} = 'Unicode planes';
94 $row{cell} = do 'charset-ucplanes.inc.pl'
95 or Alert('Table data could not be read', $@ || $!);
98 elsif ($row{set} = Encode::resolve_alias($input)) {
99 if ($row{set} eq 'Internal') {
100 $row{table} = ' ' x ($endpoint < 255 ? 640 : 8192);
101 $row{set} = 'Unicode BMP';
102 $row{cell} = do 'charset-unicode.inc.pl'
103 or Alert('Table data could not be read', $@ || $!);
105 elsif ($row{set} eq 'utf-8-strict') {
108 $row{cell} = do 'charset-utf8.inc.pl'
109 or Alert('Table data could not be read', $@ || $!);
112 $row{table} = Encode::decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
113 # (~16x faster than decoding in loop;
114 # substr strings is twice as fast as splitting to an array)
116 if ($row{set} eq 'cp437') {
117 substr($row{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
118 substr($row{table}, 0, 32) = pack 'U*', map {hex} qw(
119 2007 263A 263B 2665 2666 2663 2660 2022
120 25D8 25CB 25D9 2642 2640 266A 266B 263C
121 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8
122 2191 2193 2192 2190 221F 2194 25B2 25BC
128 Alert("Encoding <q>$input</q> unknown");
133 my @request = map { tabinput($_) } @tablist;
135 my $NOCHAR = chr 0xFFFD;
138 my ($info, $offset) = @_;
139 my $table = $info->{cell} or return;
140 my $def = $table->{$offset} or return;
141 my ($len, $class, $name, $title) = @{$def};
143 my $cols = $info->{cols};
144 my $colsize = $table->{colsize} || 1;
147 $name //= $len <= 2 ? 'res' : 'reserved';
149 if (my $part = $offset/$colsize % $cols) {
151 my $rest = $cols - $part; # remaining
152 $rest = $len if $len < $rest; #TODO: optimise
154 # continued on new row
155 my @next = ($len * $colsize, "$class joinu");
158 push @next, $name, $title;
163 # minority on next row
164 push @next, '"', $title || $name;
166 $table->{$offset + $colsize*$rest} //= \@next;
171 elsif (my $rows = int($len / $cols)) {
173 if ($len -= $rows * $cols) {
174 # partial row remains
175 $table->{$offset + $colsize*$rows * $cols} //= [$len*$colsize, "$class joinu", '', $title];
178 $attr .= sprintf ' rowspan=%d', $rows;
182 $attr .= sprintf ' colspan=%d', $len unless $len == 1;
183 $attr .= $1 if $class and $class =~ s/( \w+="[^"]*")//;
184 $attr .= sprintf ' class="%s"', $class if $class;
185 $attr .= sprintf ' title="%s"', EscapeHTML($title) if $title;
186 return "<td$attr>$name";
189 for my $row (@request) {
190 my $cols = $row->{cols};
191 my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
192 my $coldigits = ceil(log($colsize * $cols) / log(16)); # uniform length of hexadecimal header
193 my $rowdiv = 16 ** $coldigits; # row divide for column digits
194 $rowdiv = 1 if $rowdiv != $cols * $colsize; # divide only if all columns are matched
196 my $endpoint = $offset + (length($row->{table}) || 256) * $colsize;
198 printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
199 my $title = $row->{set};
200 $title .= " <aside>($_)</aside>" for $row->{setnote} // ();
201 printf '<caption>%s</caption>', $title;
202 print '<col>' x ($cols + 1);
203 for my $section (qw{thead}) {
204 print "<$section><tr><th>", $rowdiv == 1 ? '+' : '↱';
205 printf '<th>%0*X', $coldigits, $_ * $colsize for 0 .. $cols - 1;
209 while ($offset < $endpoint - 1) {
212 if (my $rowmod = $offset % $rowdiv) {
213 # offset in column units
214 printf '<small>+%X</small>', $rowmod;
218 printf '%X', ($offset + $row->{offset}) / $rowdiv;
223 print range_cell($row, $offset);
227 my $glyph = substr $row->{table}, $offset, 1;
228 if ($glyph eq $NOCHAR) {
233 print "\n".$glyphs->glyph_cell($glyph);
240 say '</table></div>';
247 <table class="glyphs"><tr>
248 <td class="X Cc">control
249 <td class="X Zs"><span>whitespace</span>
250 <td class="X Mn">diacritic<table class="glyphs"><tr>
251 <td class="X Sk">letter
253 <td class="X Po">punctuation<table class="glyphs"><tr>
254 <td class="X Pf">quote
256 <td class="X So">symbol<table class="glyphs"><tr>
257 <td class="X Sm">math
258 <td class="X Sc">currency
260 <td class="X No">numeric
261 <td class="X Greek">greek<table class="glyphs"><tr>
262 <td class="X Latin">latin
263 <td class="X Cyrillic">cyrillic
265 <td class="X Aramaic">aramaic<table class="glyphs"><tr>
266 <td class="X Brahmic">brahmic
267 <td class="X Arabic">arabic
269 <td class="X Syllabic">syllabic<table class="glyphs"><tr>
270 <td class="X African">african
271 <td class="X Hiragana">japanese
272 <td class="X Han">cjk
273 <td class="X Bopomofo">chinese
275 <td class="X Alpha">alphabetic
278 <table class="glyphs"><tr>
279 <td class="X">unicode 7.0
280 <td class="X Xr">proposed
281 <td class="X Xd">deprecated
282 <td class="">unassigned
283 <td class="X Xi">invalid