-for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
- substr($request[$cp437]->{table}, 237, 1) = pack 'U*', 0x3D5; # phi sign
- substr($request[$cp437]->{table}, 0, 32) = pack 'U*', map {hex} qw(
- 2007 263A 263B 2665 2666 2663 2660 2022 25D8 25CB 25D9 2642 2640 266A 266B 263C
- 25BA 25C4 2195 203C 00B6 00A7 25AC 21A8 2191 2193 2192 2190 221F 2194 25B2 25BC
- );
+ if ($row{set}) {}
+ elsif ($row{set} = Encode::resolve_alias($input)) {
+ $row{offset} = delete $row{startpoint};
+ $row{endpoint} ||= 0xFF;
+ if ($row{set} eq 'MacHebrew' or $row{set} eq 'MacThai') {
+ # array of possibly multiple characters per code point
+ $row{table} = [
+ map { Encode::decode($row{set}, pack 'C*', $_) } $row{offset} .. $row{endpoint}
+ ];
+ }
+ else {
+ # ~16x faster than decoding in loop;
+ # substr strings is twice as fast as splitting to an array
+ $row{table} = Encode::decode($row{set}, pack 'C*', $row{offset} .. $row{endpoint});
+ }
+
+ if ($row{set} eq 'cp437') {
+ if ($row{offset} <= 0xED and $row{endpoint} >= 0xED) {
+ # replace phi glyph
+ substr($row{table}, 0xED - $row{offset}, 1) = 'ϕ';
+ }
+ if ($row{offset} < 0x20) {
+ # replace control characters by visible variants
+ my $sub = substr ' ☺☻♥♦♣♠•◘○◙♂♀♪♫☼►◄↕‼¶§▬↨↑↓→←∟↔▲▼', $row{offset};
+ substr($row{table}, 0, length $sub) = $sub;
+ }
+ }
+ elsif ($row{set} eq 'symbol') {
+ if ($row{offset} <= 0x60 and $row{endpoint} >= 0x60) {
+ # replace radical extender by closest unicode equivalent
+ substr($row{table}, 0x60 - $row{offset}, 1) = '│';
+ }
+ if ($row{offset} <= 0xBD and $row{endpoint} >= 0xFF) {
+ substr($row{table}, 0xBD - $row{offset}, 2) = '⏐⎯'; # arrow extenders
+ substr($row{table}, 0xD2 - $row{offset}, 3) = '®©™'; # serif variants
+ substr($row{table}, 0xE0 - $row{offset}, 1) = '◊'; # replace lookalike, should match AdobeSymbol
+ substr($row{table}, 0xE2 - $row{offset}, 3) = '®©™'; # sans-serif variants
+ substr($row{table}, 0xE6 - $row{offset}, 10) = '⎛⎜⎝⎡⎢⎣⎧⎨⎩⎪';
+ substr($row{table}, 0xF0 - $row{offset}, 1) = '€';
+ substr($row{table}, 0xF4 - $row{offset}, 11) = '⎮⌡⎞⎟⎠⎤⎥⎦⎫⎬⎭';
+ }
+ }
+
+ $row{endpoint} -= $row{offset};
+
+ $visible->{ascii} = # assume common base
+ $visible->{ $row{set} } = 1;
+ }
+ else {
+ Alert("Encoding <q>$input</q> unknown");
+ return;
+ }
+ push @request, \%row;