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 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)],
41 if (my $follow = $ALIAS->{$input}) {
42 return map { tabinput($_) } @{$follow};
45 my %row = (offset => 0, cols => 16);
47 if ($input =~ s/^--//) {
48 $row{offset} = $endpoint > 160 ? 160 : 48;
50 elsif ($input =~ s/^-//) {
51 $row{offset} = $endpoint > 128 ? 128 : 32;
53 if ($input =~ s/-$//) {
54 $endpoint = $row{offset} ? $row{offset} < 160 ? 159 : 191 : 127;
57 $row{setnote} = 'over cp437' if $input eq 'cp850';
58 $row{setnote} = 'over iso-8859-1' if $input =~ /^iso-8859-|^cp125/;
61 if ($input =~ /^U([0-9a-f]+)(?:-([0-9a-f]+))?/) {
62 my $start = hex($1) << ($2 ? 4 : 8);
63 my $end = $2 ? hex($2) << 4 : $start + 240;
64 $row{table} = join '', map { chr } $start .. $end+15;
65 utf8::upgrade($row{table}); # prevent latin1 output
66 $row{set} = sprintf 'Unicode block U+%02Xxx', $start >> 8;
68 elsif ($input eq 'U') {
69 $row{table} = ' ' x 1024;
70 $row{set} = 'Unicode planes';
71 $row{cell} = do 'charset-ucplanes.inc.pl'
72 or Alert('Table data could not be read', $@ || $!);
75 elsif ($row{set} = Encode::resolve_alias($input)) {
76 if ($row{set} eq 'Internal') {
77 $row{table} = ' ' x ($endpoint < 255 ? 640 : 8192);
78 $row{set} = 'Unicode BMP';
79 $row{cell} = do 'charset-unicode.inc.pl'
80 or Alert('Table data could not be read', $@ || $!);
82 elsif ($row{set} eq 'utf-8-strict') {
85 $row{cell} = do 'charset-utf8.inc.pl'
86 or Alert('Table data could not be read', $@ || $!);
89 $row{table} = Encode::decode($row{set}, pack 'C*', $row{offset} .. $endpoint);
90 # (~16x faster than decoding in loop;
91 # substr strings is twice as fast as splitting to an array)
93 if ($row{set} eq 'cp437') {
94 substr($row{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
95 substr($row{table}, 0, 32) = pack 'U*', map {hex} qw(
96 2007 263A 263B 2665 2666 2663 2660 2022
97 25D8 25CB 25D9 2642 2640 266A 266B 263C
98 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8
99 2191 2193 2192 2190 221F 2194 25B2 25BC
105 Alert("Encoding <q>$input</q> unknown");
110 my @request = map { tabinput($_) } @tablist;
112 my $NOCHAR = chr 0xFFFD;
115 my ($info, $offset) = @_;
116 my $table = $info->{cell} or return;
117 my $def = $table->{$offset} or return;
118 my ($len, $class, $name, $title) = @{$def};
120 my $cols = $info->{cols};
121 my $colsize = $table->{colsize} || 1;
124 $name //= $len <= 2 ? 'res' : 'reserved';
126 if (my $part = $offset/$colsize % $cols) {
128 my $rest = $cols - $part; # remaining
129 $rest = $len if $len < $rest; #TODO: optimise
131 # continued on new row
132 my @next = ($len * $colsize, "$class joinu");
135 push @next, $name, $title;
140 # minority on next row
141 push @next, '"', $title || $name;
143 $table->{$offset + $colsize*$rest} //= \@next;
148 elsif (my $rows = int($len / $cols)) {
150 if ($len -= $rows * $cols) {
151 # partial row remains
152 $table->{$offset + $colsize*$rows * $cols} //= [$len*$colsize, "$class joinu", '', $title];
155 $attr .= sprintf ' rowspan=%d', $rows;
159 $attr .= sprintf ' colspan=%d', $len unless $len == 1;
160 $attr .= $1 if $class and $class =~ s/( \w+="[^"]*")//;
161 $attr .= sprintf ' class="%s"', $class if $class;
162 $attr .= sprintf ' title="%s"', EscapeHTML($title) if $title;
163 return "<td$attr>$name";
166 for my $row (@request) {
167 my $cols = $row->{cols};
168 my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
169 my $coldigits = ceil(log($colsize * $cols) / log(16)); # uniform length of hexadecimal header
170 my $rowdiv = 16 ** $coldigits; # row divide for column digits
171 $rowdiv = 1 if $rowdiv != $cols * $colsize; # divide only if all columns are matched
173 my $endpoint = $offset + (length($row->{table}) || 256) * $colsize;
175 printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
176 my $title = $row->{set};
177 $title .= " <aside>($_)</aside>" for $row->{setnote} // ();
178 printf '<caption>%s</caption>', $title;
179 print '<col>' x ($cols + 1);
180 for my $section (qw{thead}) {
181 print "<$section><tr><th>", $rowdiv == 1 ? '+' : '↱';
182 printf '<th>%0*X', $coldigits, $_ * $colsize for 0 .. $cols - 1;
186 while ($offset < $endpoint - 1) {
189 if (my $rowmod = $offset % $rowdiv) {
190 # offset in column units
191 printf '<small>+%X</small>', $rowmod;
195 printf '%X', ($offset + $row->{offset}) / $rowdiv;
200 print range_cell($row, $offset);
204 my $glyph = substr $row->{table}, $offset, 1;
205 if ($glyph eq $NOCHAR) {
210 print "\n".$glyphs->glyph_cell($glyph);
217 say '</table></div>';
224 <table class="glyphs"><tr>
225 <td class="X Cc">control
226 <td class="X Zs"><span>whitespace</span>
227 <td class="X Mn">diacritic<table class="glyphs"><tr>
228 <td class="X Sk">letter
230 <td class="X Po">punctuation<table class="glyphs"><tr>
231 <td class="X Pf">quote
233 <td class="X So">symbol<table class="glyphs"><tr>
234 <td class="X Sm">math
235 <td class="X Sc">currency
237 <td class="X No">numeric
238 <td class="X Greek">greek<table class="glyphs"><tr>
239 <td class="X Latin">latin
240 <td class="X Cyrillic">cyrillic
242 <td class="X Aramaic">aramaic<table class="glyphs"><tr>
243 <td class="X Brahmic">brahmic
244 <td class="X Arabic">arabic
246 <td class="X Syllabic">syllabic<table class="glyphs"><tr>
247 <td class="X African">african
248 <td class="X Hiragana">japanese
249 <td class="X Han">cjk
250 <td class="X Bopomofo">chinese
252 <td class="X Alpha">alphabetic
255 <table class="glyphs"><tr>
256 <td class="X">unicode 7.0
257 <td class="X Xr">proposed
258 <td class="X Xd">deprecated
259 <td class="">unassigned
260 <td class="X Xi">invalid