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wakaba |
1.1 |
#!/usr/bin/perl |
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use strict; |
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use warnings; |
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use feature 'state'; |
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use CGI::Carp qw(fatalsToBrowser); |
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use lib q[/home/wakaba/work/manakai2/lib]; |
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use Message::CGI::Util qw/percent_decode/; |
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use Regexp::Parser; |
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use Graph::Easy; |
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use Scalar::Util qw/refaddr/; |
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my $default_map = {}; |
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for (qw/. \C \w \W \s \S \d \D \X \1 \2 \3 \4 \5 \6 \7 \8 \9 |
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\A ^ \B \b \G \Z \z $/) { |
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$default_map->{$_} = qq[Perl /$_/]; |
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} |
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my $assertion_map = { |
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ifmatch => '(?=)', |
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'<ifmatch' => '(?<=)', |
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unlessm => '(?!)', |
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'<unlessm' => '(?<!)', |
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}; |
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my $regexp = percent_decode $ENV{QUERY_STRING}; |
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$regexp = '(?:)' unless length $regexp; |
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my $parser = Regexp::Parser->new; |
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package Regexp::Parser; |
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# start of char class range (or maybe just char) |
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$parser->add_handler('cc' => sub { |
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my ($S) = @_; |
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return if ${&Rx} =~ m{ \G (?= ] | \z ) }xgc; |
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push @{ $S->{next} }, qw< cc >; |
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my ($lhs, $rhs, $before_range); |
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my $ret = \$lhs; |
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{ |
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if (${&Rx} =~ m{ \G ( \\ ) }xgcs) { |
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my $c = $1; |
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$$ret = $S->$c(1); |
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} |
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elsif (${&Rx} =~ m{ \G \[ ([.=:]) (\^?) (.*?) \1 \] }xgcs) { |
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my ($how, $neg, $name) = ($1, $2, $3); |
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my $posix = "POSIX_$name"; |
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if ($S->can($posix)) { $$ret = $S->$posix($neg, $how) } |
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else { $S->error(RPe_BADPOS, "$how$neg$name$how") } |
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} |
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elsif (${&Rx} =~ m{ \G (.) }xgcs) { |
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$$ret = $S->force_object(anyof_char => $1); |
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} |
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if ($ret == \$lhs) { |
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if (${&Rx} =~ m{ \G (?= - ) }xgc) { |
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if ($lhs->visual =~ /^(?:\[[:.=]|\\[dDsSwWpP])/) { |
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$S->warn(RPe_FRANGE, $lhs->visual, ""); |
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$ret = $lhs; |
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last; |
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} |
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$before_range = &RxPOS++; |
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$ret = \$rhs; |
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redo; |
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} |
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$ret = $lhs; |
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} |
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elsif ($ret == \$rhs) { |
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if ($rhs->visual =~ /^(?:\[[:.=]|\\[dDsSwWpP])/) { |
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$S->warn(RPe_FRANGE, $lhs->visual, $rhs->visual); |
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&RxPOS = $before_range; |
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$ret = $lhs; |
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} |
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elsif ($lhs->data gt $rhs->data) { |
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$S->error(RPe_IRANGE, $lhs->visual, $rhs->visual); |
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} |
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else { |
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$ret = $S->object(anyof_range => $lhs, $rhs); |
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} |
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} |
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} |
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return if &SIZE_ONLY; |
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return $ret; |
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}); |
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package main; |
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$parser->parse ($regexp); |
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binmode STDOUT, ':encoding(utf-8)'; |
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print "Content-Type: application/xhtml+xml; charset=utf-8\n\n"; |
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print $parser->errnum, $parser->errmsg; |
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add_regexp ($parser->root); |
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print q[<html xmlns="http://www.w3.org/1999/xhtml"> |
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<head><title></title> |
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</head> |
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<body>]; |
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my @regexp; |
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while (@regexp) { |
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my $nodes = shift @regexp; |
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my $index = get_graph_index ($nodes); |
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print "<section><h1>Regexp #$index</h1>\n\n"; |
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my $g = generate_graph ($nodes); |
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print $g->as_svg; |
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print "</section>\n"; |
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} |
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print q[</body></html>]; |
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sub escape_value ($) { |
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my $v = shift; |
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$v =~ s/(\W)/sprintf '\x{%04X}', ord $1/ge; |
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$v; |
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} # escape_value |
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sub escape_code ($) { |
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my $v = shift; |
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$v =~ s/([^\x20-\x5B\x5D-\x7E])/sprintf '\x{%04X}', ord $1/ge; |
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$v; |
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} # escape_code |
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sub add_regexp ($) { |
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my $nodes = shift; |
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push @regexp, $nodes; |
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} # add_regexp |
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sub get_graph_index ($) { |
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state $index; |
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state $next_index ||= 0; |
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my $nodes = shift; |
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$index->{$nodes} //= $next_index++; |
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return $index->{$nodes}; |
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} # get_graph_index |
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sub generate_graph ($$) { |
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my ($root_nodes) = @_; |
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my $g = Graph::Easy->new; |
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$g->set_attributes ('node.start' => {fill => 'blue', color => 'white'}); |
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$g->set_attributes ('node.success' => {fill => 'green', color => 'white'}); |
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my $start_n = $g->add_node ('START'); |
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$start_n->set_attribute (class => 'start'); |
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my $success_n = $g->add_node ('SUCCESS'); |
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$success_n->set_attribute (class => 'success'); |
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my ($first_ns, $last_ns, $is_optional) = add_to_graph ($root_nodes => $g); |
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$g->add_edge ($start_n => $_) for @$first_ns; |
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$g->add_edge ($_ => $success_n) for @$last_ns; |
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$g->add_edge ($start_n => $success_n) if $is_optional; |
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return $g; |
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} # generate_graph |
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sub add_to_graph ($$) { |
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my ($node, $g) = @_; |
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my $family = ref $node eq 'ARRAY' ? '' : $node->family; |
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my $type = ref $node eq 'ARRAY' ? '' : $node->type; |
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if ($family eq 'quant') { |
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my ($min, $max) = ($node->min, $node->max); |
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return ([], [], 1) if $max eq '0'; |
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my ($first_ns, $last_ns, $is_optional) = add_to_graph ($node->data => $g); |
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my $label; |
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if ($max eq '') { |
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if ($min == 0) { |
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$is_optional = 1; |
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$label = ''; |
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} elsif ($min == 1) { |
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$label = ''; |
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} else { |
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$label = 'at least ' . ($min - 1); |
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} |
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} elsif ($max == 1) { |
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if ($min == 0) { |
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$is_optional = 1; |
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} else { |
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} |
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} else { |
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$label = 'at most ' . ($max - 1); |
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if ($min == 0) { |
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$is_optional = 1; |
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} elsif ($min == 1) { |
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} else { |
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$label = 'at least ' . ($min - 1) . ', ' . $label; |
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} |
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} |
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if (@$first_ns != 1 or @$last_ns != 1) { |
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my $n = $g->add_node (refaddr $first_ns); |
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$n->set_attribute (label => ''); |
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my $m = $n; |
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unless ($is_optional) { |
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$m = $g->add_node (refaddr $last_ns); |
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$m->set_attribute (label => ''); |
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} else { |
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$is_optional = 0; |
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} |
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$g->add_edge ($n => $_) for @$first_ns; |
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$g->add_edge ($_ => $m) for @$last_ns; |
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$first_ns = [$n]; |
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$last_ns = [$m]; |
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} |
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if (defined $label) { |
| 229 |
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my $e = $g->add_edge ($last_ns->[0] => $first_ns->[0]); |
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$e->set_attribute (label => $label); |
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} |
| 232 |
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| 233 |
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return ($first_ns, $last_ns, $is_optional); |
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} elsif ($type eq 'branch') { |
| 235 |
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my @first_n; |
| 236 |
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my @last_n; |
| 237 |
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my $is_optional = 0; |
| 238 |
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for (@{$node->data}) { |
| 239 |
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my ($f_ns, $l_ns, $is_opt) = add_to_graph ($_ => $g); |
| 240 |
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push @first_n, @$f_ns; |
| 241 |
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push @last_n, @$l_ns; |
| 242 |
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$is_optional |= $is_opt; |
| 243 |
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} |
| 244 |
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return (\@first_n, \@last_n, $is_optional); |
| 245 |
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} elsif ($type eq 'anyof') { |
| 246 |
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if ($node->neg) { |
| 247 |
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my $nodes = Regexp::Parser::branch->new ($node->{rx}); |
| 248 |
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$nodes->{data} = $node->data; |
| 249 |
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| 250 |
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add_regexp ($nodes); |
| 251 |
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| 252 |
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my $n = $g->add_node (refaddr $nodes); |
| 253 |
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my $label = 'NOT #' . get_graph_index ($nodes); |
| 254 |
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$n->set_attribute (label => $label); |
| 255 |
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| 256 |
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return ([$n], [$n], 0); |
| 257 |
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} else { |
| 258 |
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my @first_n; |
| 259 |
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my @last_n; |
| 260 |
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for (@{$node->data}) { |
| 261 |
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my ($f_ns, $l_ns) = add_to_graph ($_ => $g); |
| 262 |
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push @first_n, @$f_ns; |
| 263 |
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push @last_n, @$l_ns; |
| 264 |
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} |
| 265 |
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return (\@first_n, \@last_n, 0); |
| 266 |
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} |
| 267 |
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} elsif ($type eq '') { |
| 268 |
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my $prev_ns; |
| 269 |
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my $first_ns; |
| 270 |
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my $is_optional = 1; |
| 271 |
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for (@{$node}) { |
| 272 |
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my ($f_ns, $l_ns, $is_opt) = add_to_graph ($_ => $g); |
| 273 |
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if ($prev_ns) { |
| 274 |
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if (@$prev_ns > 1 and @$f_ns > 1) { |
| 275 |
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my $n = $g->add_node (refaddr $f_ns); |
| 276 |
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$n->set_attribute (label => ''); |
| 277 |
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$g->add_edge ($_ => $n) for @$prev_ns; |
| 278 |
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$g->add_edge ($n => $_) for @$f_ns; |
| 279 |
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} else { |
| 280 |
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for my $prev_n (@$prev_ns) { |
| 281 |
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for my $f_n (@$f_ns) { |
| 282 |
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$g->add_edge ($prev_n => $f_n); |
| 283 |
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} |
| 284 |
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} |
| 285 |
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} |
| 286 |
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if ($is_optional) { |
| 287 |
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push @$first_ns, @$f_ns; |
| 288 |
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} |
| 289 |
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if ($is_opt) { |
| 290 |
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push @$prev_ns, @$l_ns; |
| 291 |
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} else { |
| 292 |
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$prev_ns = $l_ns if @$l_ns; |
| 293 |
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} |
| 294 |
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} else { |
| 295 |
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$first_ns = $f_ns; |
| 296 |
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$prev_ns = $l_ns if @$l_ns; |
| 297 |
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} |
| 298 |
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$is_optional &= $is_opt; |
| 299 |
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} |
| 300 |
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return ($first_ns || [], $prev_ns || [], $is_optional); |
| 301 |
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} elsif ($family eq 'group' or $family eq 'open' or $type eq 'suspend') { |
| 302 |
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## TODO: (?:) vs () vs (?>), (?:)->on, (?:)->off |
| 303 |
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my ($f_ns, $l_ns, $is_opt) = add_to_graph ($node->data => $g); |
| 304 |
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return ($f_ns, $l_ns, $is_opt); |
| 305 |
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} elsif ($type eq 'ifthen') { |
| 306 |
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my $nodes = $node->data; |
| 307 |
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| 308 |
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my $groupp = $nodes->[0]; |
| 309 |
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my $label = $groupp ? '(?' . $groupp->visual . ')' : ''; |
| 310 |
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my $n = $g->add_node (refaddr $groupp); |
| 311 |
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$n->set_attribute (label => $label); |
| 312 |
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| 313 |
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my $l = $g->add_node (refaddr $nodes); |
| 314 |
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$l->set_attribute (label => ''); |
| 315 |
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| 316 |
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my $branch = $nodes->[1]; |
| 317 |
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my $branches = $branch ? $branch->data : []; |
| 318 |
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| 319 |
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my $true = $branches->[0]; |
| 320 |
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if ($true) { |
| 321 |
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my ($f_ns, $l_ns, $is_opt) = add_to_graph ($true => $g); |
| 322 |
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$g->add_edge ($n => $_)->set_attribute (label => 'true') for @$f_ns; |
| 323 |
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$g->add_edge ($_ => $l) for @$l_ns; |
| 324 |
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$g->add_edge ($n => $l)->set_attribute (label => 'true') if $is_opt; |
| 325 |
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} |
| 326 |
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| 327 |
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my $false = $branches->[1]; |
| 328 |
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if ($false) { |
| 329 |
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my ($f_ns, $l_ns, $is_opt) = add_to_graph ($false => $g); |
| 330 |
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$g->add_edge ($n => $_)->set_attribute (label => 'false') for @$f_ns; |
| 331 |
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$g->add_edge ($_ => $l) for @$l_ns; |
| 332 |
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$g->add_edge ($n => $l)->set_attribute (label => 'false') if $is_opt; |
| 333 |
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} |
| 334 |
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| 335 |
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return ([$n], [$l], 0); |
| 336 |
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} elsif ($type eq 'eval' or $type eq 'logical') { |
| 337 |
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my $n = $g->add_node (refaddr $node); |
| 338 |
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my $label = $type eq 'eval' ? '(?{})' : '(??{})'; |
| 339 |
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$label .= ' ' . escape_code $node->data; |
| 340 |
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$n->set_attribute (label => $label); |
| 341 |
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return ([$n], [$n], 0); |
| 342 |
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} elsif ($family eq 'assertion') { |
| 343 |
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my $nodes = $node->data; |
| 344 |
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add_regexp ($nodes); |
| 345 |
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| 346 |
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my $n = $g->add_node (refaddr $nodes); |
| 347 |
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$type = '<' . $type if $node->dir < 0; |
| 348 |
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my $label = $assertion_map->{$type} // $type; |
| 349 |
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$label .= ' #' . get_graph_index ($nodes); |
| 350 |
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$n->set_attribute (label => $label); |
| 351 |
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| 352 |
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|
return ([$n], [$n], 0); |
| 353 |
|
|
} elsif ($family eq 'anyof_class') { |
| 354 |
|
|
my $data = $node->data; |
| 355 |
|
|
my $label; |
| 356 |
|
|
if ($data eq 'POSIX') { |
| 357 |
|
|
my $how = ${$node->{how}}; |
| 358 |
|
|
if ($how eq ':') { |
| 359 |
|
|
$label = 'POSIX ' . $node->{type}; |
| 360 |
|
|
$label = 'NOT ' . $label if $node->neg; |
| 361 |
|
|
} else { |
| 362 |
|
|
$label = $how . $node->neg . $node->{type} . $how; |
| 363 |
|
|
} |
| 364 |
|
|
} else { |
| 365 |
|
|
my $data_family = $data->family; |
| 366 |
|
|
if ($data_family eq 'prop') { |
| 367 |
|
|
$label = 'property ' . $node->type; |
| 368 |
|
|
$label = 'NOT ' . $label if $node->neg; |
| 369 |
|
|
} elsif ($data_family eq 'space') { |
| 370 |
|
|
$label = $data->neg ? 'Perl /\S/' : 'Perl /\s/'; |
| 371 |
|
|
} elsif ($data_family eq 'alnum') { |
| 372 |
|
|
$label = $data->neg ? 'Perl /\W/' : 'Perl /\w/'; |
| 373 |
|
|
} elsif ($data_family eq 'digit') { |
| 374 |
|
|
$label = $data->neg ? 'Perl /\D/' : 'Perl /\d/'; |
| 375 |
|
|
} else { |
| 376 |
|
|
$label = $data->visual; |
| 377 |
|
|
} |
| 378 |
|
|
} |
| 379 |
|
|
|
| 380 |
|
|
my $n = $g->add_node (refaddr $node); |
| 381 |
|
|
$n->set_attribute (label => $label); |
| 382 |
|
|
|
| 383 |
|
|
return ([$n] => [$n]); |
| 384 |
|
|
} elsif ($family eq 'exact' or $type eq 'anyof_char') { |
| 385 |
|
|
my $n = $g->add_node (refaddr $node); |
| 386 |
|
|
|
| 387 |
|
|
my $label = escape_value $node->data; |
| 388 |
|
|
$n->set_attribute (label => qq[ "$label" ]); |
| 389 |
|
|
|
| 390 |
|
|
return ([$n] => [$n]); |
| 391 |
|
|
} elsif ($family eq 'flags') { |
| 392 |
|
|
## TODO: scope |
| 393 |
|
|
my $n = $g->add_node (refaddr $node); |
| 394 |
|
|
|
| 395 |
|
|
my $label = $node->visual; |
| 396 |
|
|
$n->set_attribute (label => $label); |
| 397 |
|
|
|
| 398 |
|
|
return ([$n] => [$n], 0); |
| 399 |
|
|
} elsif ($family eq 'minmod') { |
| 400 |
|
|
my $nodes = $node->data; |
| 401 |
|
|
add_regexp ($nodes); |
| 402 |
|
|
|
| 403 |
|
|
my $n = $g->add_node (refaddr $nodes); |
| 404 |
|
|
my $label = 'non-greedy #' . get_graph_index ($nodes); |
| 405 |
|
|
$n->set_attribute (label => $label); |
| 406 |
|
|
|
| 407 |
|
|
return ([$n], [$n], 0); |
| 408 |
|
|
} elsif ($family eq 'anyof_range') { |
| 409 |
|
|
my $n = $g->add_node (refaddr $node); |
| 410 |
|
|
|
| 411 |
|
|
my $start = escape_value $node->data->[0]->data; |
| 412 |
|
|
my $end = escape_value $node->data->[1]->data; |
| 413 |
|
|
my $label = qq[ one of "$start" .. "$end" ]; |
| 414 |
|
|
$n->set_attribute (label => $label); |
| 415 |
|
|
|
| 416 |
|
|
return ([$n] => [$n], 0); |
| 417 |
|
|
} else { |
| 418 |
|
|
# anyof_char |
| 419 |
|
|
# anyof_range |
| 420 |
|
|
|
| 421 |
|
|
my $n = $g->add_node (refaddr $node); |
| 422 |
|
|
|
| 423 |
|
|
my $label = $node->visual; |
| 424 |
|
|
$label = $default_map->{$label} // escape_value $label; |
| 425 |
|
|
$label .= ' (' . $type . ')'; |
| 426 |
|
|
$n->set_attribute (label => $label); |
| 427 |
|
|
|
| 428 |
|
|
return ([$n] => [$n], 0); |
| 429 |
|
|
} |
| 430 |
|
|
} # add_to_graph |
| 431 |
|
|
|
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