+++ /dev/null
-#!/usr/bin/perl
-
-use strict;
-use warnings;
-
-my $depth = 0;
-my $in = "";
-my $delim = 1;
-
-package P5RE;
-
-our $extended;
-our $insensitive;
-our $singleline;
-our $multiline;
-
-my %xmlish = (
- chr(0x00) => "STUPIDXML(#x00)",
- chr(0x01) => "STUPIDXML(#x01)",
- chr(0x02) => "STUPIDXML(#x02)",
- chr(0x03) => "STUPIDXML(#x03)",
- chr(0x04) => "STUPIDXML(#x04)",
- chr(0x05) => "STUPIDXML(#x05)",
- chr(0x06) => "STUPIDXML(#x06)",
- chr(0x07) => "STUPIDXML(#x07)",
- chr(0x08) => "STUPIDXML(#x08)",
- chr(0x09) => "	",
- chr(0x0a) => " ",
- chr(0x0b) => "STUPIDXML(#x0b)",
- chr(0x0c) => "STUPIDXML(#x0c)",
- chr(0x0d) => " ",
- chr(0x0e) => "STUPIDXML(#x0e)",
- chr(0x0f) => "STUPIDXML(#x0f)",
- chr(0x10) => "STUPIDXML(#x10)",
- chr(0x11) => "STUPIDXML(#x11)",
- chr(0x12) => "STUPIDXML(#x12)",
- chr(0x13) => "STUPIDXML(#x13)",
- chr(0x14) => "STUPIDXML(#x14)",
- chr(0x15) => "STUPIDXML(#x15)",
- chr(0x16) => "STUPIDXML(#x16)",
- chr(0x17) => "STUPIDXML(#x17)",
- chr(0x18) => "STUPIDXML(#x18)",
- chr(0x19) => "STUPIDXML(#x19)",
- chr(0x1a) => "STUPIDXML(#x1a)",
- chr(0x1b) => "STUPIDXML(#x1b)",
- chr(0x1c) => "STUPIDXML(#x1c)",
- chr(0x1d) => "STUPIDXML(#x1d)",
- chr(0x1e) => "STUPIDXML(#x1e)",
- chr(0x1f) => "STUPIDXML(#x1f)",
- chr(0x7f) => "STUPIDXML(#x7f)",
- chr(0x80) => "STUPIDXML(#x80)",
- chr(0x81) => "STUPIDXML(#x81)",
- chr(0x82) => "STUPIDXML(#x82)",
- chr(0x83) => "STUPIDXML(#x83)",
- chr(0x84) => "STUPIDXML(#x84)",
- chr(0x86) => "STUPIDXML(#x86)",
- chr(0x87) => "STUPIDXML(#x87)",
- chr(0x88) => "STUPIDXML(#x88)",
- chr(0x89) => "STUPIDXML(#x89)",
- chr(0x90) => "STUPIDXML(#x90)",
- chr(0x91) => "STUPIDXML(#x91)",
- chr(0x92) => "STUPIDXML(#x92)",
- chr(0x93) => "STUPIDXML(#x93)",
- chr(0x94) => "STUPIDXML(#x94)",
- chr(0x95) => "STUPIDXML(#x95)",
- chr(0x96) => "STUPIDXML(#x96)",
- chr(0x97) => "STUPIDXML(#x97)",
- chr(0x98) => "STUPIDXML(#x98)",
- chr(0x99) => "STUPIDXML(#x99)",
- chr(0x9a) => "STUPIDXML(#x9a)",
- chr(0x9b) => "STUPIDXML(#x9b)",
- chr(0x9c) => "STUPIDXML(#x9c)",
- chr(0x9d) => "STUPIDXML(#x9d)",
- chr(0x9e) => "STUPIDXML(#x9e)",
- chr(0x9f) => "STUPIDXML(#x9f)",
- '<' => "<",
- '>' => ">",
- '&' => "&",
- '"' => """, # XML idiocy
-);
-
-sub xmlquote {
- my $text = shift;
- $text =~ s/(.)/$xmlish{$1} || $1/seg;
- return $text;
-}
-
-sub text {
- my $self = shift;
- return xmlquote($self->{text});
-}
-
-sub rep {
- my $self = shift;
- return xmlquote($self->{rep});
-}
-
-sub xmlkids {
- my $self = shift;
- my $array = $self->{Kids};
- my $ret = "";
- $depth++;
- $in = ' ' x ($depth * 2);
- foreach my $chunk (@$array) {
- if (ref $chunk eq "ARRAY") {
- die;
- }
- elsif (ref $chunk) {
- $ret .= $chunk->xml();
- }
- else {
- warn $chunk;
- }
- }
- $depth--;
- $in = ' ' x ($depth * 2);
- return $ret;
-};
-
-package P5RE::RE; BEGIN { our @ISA = 'P5RE'; }
-
-sub xml {
- my $self = shift;
- my $kind = $self->{kind};
- my $modifiers = $self->{modifiers} || "";
- if ($modifiers) {
- $modifiers = " modifiers=\"$modifiers\"";
- }
- my $text = "$in<$kind$modifiers>\n";
- $text .= $self->xmlkids();
- $text .= "$in</$kind>\n";
- return $text;
-}
-
-package P5RE::Alt; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- my $text = "$in<alt>\n";
- $text .= $self->xmlkids();
- $text .= "$in</alt>\n";
- return $text;
-}
-
-#package P5RE::Atom; our @ISA = 'P5RE';
-#
-#sub xml {
-# my $self = shift;
-# my $text = "$in<atom>\n";
-# $text .= $self->xmlkids();
-# $text .= "$in</atom>\n";
-# return $text;
-#}
-
-package P5RE::Quant; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- my $q = $self->{type};
- my $text = "$in<quant type=\"$q\">\n";
- $text .= $self->xmlkids();
- $text .= "$in</quant>\n";
- return $text;
-}
-
-package P5RE::White; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<white text=\"" . $self->text() . "\" />\n";
-}
-
-package P5RE::Char; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<char text=\"" . $self->text() . "\" />\n";
-}
-
-package P5RE::Comment; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<comment rep=\"" . $self->rep() . "\" />\n";
-}
-
-package P5RE::Mod; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<mod modifiers=\"" . $self->{modifiers} . "\" />\n";
-}
-
-package P5RE::Meta; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- my $sem = "";
- if ($self->{sem}) {
- $sem = 'sem="' . $self->{sem} . '" '
- }
- return "$in<meta rep=\"" . $self->rep() . "\" $sem/>\n";
-}
-
-package P5RE::Var; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<var name=\"" . $self->{name} . "\" />\n";
-}
-
-package P5RE::Closure; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- return "$in<closure rep=\"" . $self->{rep} . "\" />\n";
-}
-
-package P5RE::CClass; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- my $neg = $self->{neg} ? "negated" : "normal";
- my $text = "$in<cclass match=\"$neg\">\n";
- $text .= $self->xmlkids();
- $text .= "$in</cclass>\n";
- return $text;
-}
-
-package P5RE::Range; our @ISA = 'P5RE';
-
-sub xml {
- my $self = shift;
- my $text = "$in<range>\n";
- $text .= $self->xmlkids();
- $text .= "$in</range>\n";
- return $text;
-}
-
-package P5RE;
-
-sub re {
- my $kind = shift;
- my @alts;
-
- push(@alts, alt());
-
- while (s/^\|//) {
- push(@alts, alt());
- }
- return bless { Kids => [@alts], kind => $kind }, "P5RE::RE";
-}
-
-sub alt {
- my @quants;
-
- my $quant;
- local $extended = $extended;
- local $insensitive = $insensitive;
- local $multiline = $multiline;
- local $singleline = $singleline;
- while ($quant = quant()) {
- if (@quants and
- ref $quant eq ref $quants[-1] and
- exists $quants[-1]{text} and
- exists $quant->{text} )
- {
- $quants[-1]{text} .= $quant->{text};
- }
- else {
- push(@quants, $quant);
- }
- }
- return bless { Kids => [@quants] }, "P5RE::Alt";
-}
-
-sub quant {
- my $atom = atom();
- return 0 unless $atom;
-# $atom = bless { Kids => [$atom] }, "P5RE::Atom";
- if (s/^([*+?]\??|\{\d+(?:,\d*)?\}\??)//) {
- return bless { Kids => [$atom], type => $1 }, "P5RE::Quant";
- }
- return $atom;
-}
-
-sub atom {
- my $re;
- if ($_ eq "") { return 0 }
- if (/^[)|]/) { return 0 }
-
- # whitespace is special because we don't know if /x is in effect
- if ($extended) {
- if (s/^(?=\s|#)(\s*(?:#.*)?)//) { return bless { text => $1 }, "P5RE::White"; }
- }
-
- # all the parenthesized forms
- if (s/^\(//) {
- if (s/^\?://) {
- $re = re('bracket');
- }
- elsif (s/^(\?#.*?)\)/)/) {
- $re = bless { rep => "($1)" }, "P5RE::Comment";
- }
- elsif (s/^\?=//) {
- $re = re('lookahead');
- }
- elsif (s/^\?!//) {
- $re = re('neglookahead');
- }
- elsif (s/^\?<=//) {
- $re = re('lookbehind');
- }
- elsif (s/^\?<!//) {
- $re = re('neglookbehind');
- }
- elsif (s/^\?>//) {
- $re = re('nobacktrack');
- }
- elsif (s/^(\?\??\{.*?\})\)/)/) {
- $re = bless { rep => "($1)" }, "P5RE::Closure";
- }
- elsif (s/^(\?\(\d+\))//) {
- my $mods = $1;
- $re = re('conditional');
- $re->{modifiers} = "$mods";
- }
- elsif (s/^\?(?=\(\?)//) {
- my $mods = $1;
- my $cond = atom();
- $re = re('conditional');
- unshift(@{$re->{Kids}}, $cond);
- }
- elsif (s/^(\?[-imsx]+)://) {
- my $mods = $1;
- local $extended = $extended;
- local $insensitive = $insensitive;
- local $multiline = $multiline;
- local $singleline = $singleline;
- setmods($mods);
- $re = re('bracket');
- $re->{modifiers} = "$mods";
- }
- elsif (s/^(\?[-imsx]+)//) {
- my $mods = $1;
- $re = bless { modifiers => "($mods)" }, "P5RE::Mod";
- setmods($mods);
- }
- elsif (s/^\?//) {
- $re = re('UNRECOGNIZED');
- }
- else {
- $re = re('capture');
- }
-
- if (not s/^\)//) { die "Expected right paren at: '$_'" }
- return $re;
- }
-
- # special meta
- if (s/^\.//) {
- my $s = $singleline ? '.' : '\N';
- return bless { rep => '.', sem => $s }, "P5RE::Meta";
- }
- if (s/^\^//) {
- my $s = $multiline ? '^^' : '^';
- return bless { rep => '^', sem => $s }, "P5RE::Meta";
- }
- if (s/^\$(?:$|(?=[|)]))//) {
- my $s = $multiline ? '$$' : '$';
- return bless { rep => '$', sem => $s }, "P5RE::Meta";
- }
- if (s/^([\$\@](\w+|.))//) { # XXX need to handle subscripts here
- return bless { name => $1 }, "P5RE::Var";
- }
-
- # character classes
- if (s/^\[//) {
- my $re = cclass();
- if (not s/^\]//) { die "Expected right paren at: '$_'" }
- return $re;
- }
-
- # backwhacks
- if (/^\\(?=.)/) {
- return bless { rep => onechar() }, "P5RE::Meta";
- }
-
- # optimization, would happen anyway
- if (s/^(\w+)//) { return bless { text => $1 }, "P5RE::Char"; }
-
- # random character
- if (s/^(.)//) { return bless { text => $1 }, "P5RE::Char"; }
-}
-
-sub cclass {
- my @cclass;
- my $cclass = "";
- my $neg = 0;
- if (s/^\^//) { $neg = 1 }
- if (s/^([\]\-])//) { $cclass .= $1 }
-
- while ($_ ne "" and not /^\]/) {
- # backwhacks
- if (/^\\(?=.)|.-/) {
- my $o1 = onecharobj();
- if ($cclass ne "") {
- push @cclass, bless { text => $cclass }, "P5RE::Char";
- $cclass = "";
- }
-
- if (s/^-(?=[^]])//) {
- my $o2 = onecharobj();
- push @cclass, bless { Kids => [$o1, $o2] }, "P5RE::Range";
- }
- else {
- push @cclass, $o1;
- }
- }
- elsif (s/^(\[([:=.])\^?\w*\2\])//) {
- if ($cclass ne "") {
- push @cclass, bless { text => $cclass }, "P5RE::Char";
- $cclass = "";
- }
- push @cclass, bless { rep => $1 }, "P5RE::Meta";
- }
- else {
- $cclass .= onechar();
- }
- }
-
- if ($cclass ne "") {
- push @cclass, bless { text => $cclass }, "P5RE::Char";
- }
- return bless { Kids => [@cclass], neg => $neg }, "P5RE::CClass";
-}
-
-sub onecharobj {
- my $ch = onechar();
- if ($ch =~ /^\\/) {
- $ch = bless { rep => $ch }, "P5RE::Meta";
- }
- else {
- $ch = bless { text => $ch }, "P5RE::Char";
- }
-}
-
-sub onechar {
- die "Oops, short cclass" unless s/^(.)//;
- my $ch = $1;
- if ($ch eq '\\') {
- if (s/^([rntf]|[0-7]{1,4})//) { $ch .= $1 }
- elsif (s/^(x[0-9a-fA-f]{1,2})//) { $ch .= $1 }
- elsif (s/^(x\{[0-9a-fA-f]+\})//) { $ch .= $1 }
- elsif (s/^([NpP]\{.*?\})//) { $ch .= $1 }
- elsif (s/^([cpP].)//) { $ch .= $1 }
- elsif (s/^(.)//) { $ch .= $1 }
- else {
- die "Oops, short backwhack";
- }
- }
- return $ch;
-}
-
-sub setmods {
- my $mods = shift;
- if ($mods =~ /\-.*x/) {
- $extended = 0;
- }
- elsif ($mods =~ /x/) {
- $extended = 1;
- }
- if ($mods =~ /\-.*i/) {
- $insensitive = 0;
- }
- elsif ($mods =~ /i/) {
- $insensitive = 1;
- }
- if ($mods =~ /\-.*m/) {
- $multiline = 0;
- }
- elsif ($mods =~ /m/) {
- $multiline = 1;
- }
- if ($mods =~ /\-.*s/) {
- $singleline = 0;
- }
- elsif ($mods =~ /s/) {
- $singleline = 1;
- }
-}
-
-sub reparse {
- local $_ = shift;
- s/^(\W)(.*)\1(\w*)$/$2/;
- my $mod = $3;
- substr($_,0,0) = "(?$mod)" if $mod ne "";
- print $_,"\n";
- return re('re');
-}
-
-if (not caller) {
- while (my $line = <>) {
- chop $line;
- my $x = P5RE::reparse($line);
- print $x->xml();
- print "#######################################\n";
- }
-}
-
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