This file is indexed.

/usr/share/perl5/Parse/MediaWikiDump/XML.pm is in libparse-mediawikidump-perl 1.0.6-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
#this is set to become a new module on CPAN after
#testing is done and documentation is written

#this module is a thin wrapper around XML::Accumulator that
#provides a tree interface for the event handlers. The engine
#follows the tree as it receives events from XML::Accumulator
#so that context can be pulled out from the location in the 
#tree.

#Handlers for this module are also registered as callbacks but
#exist at a specific node on the tree. Each handler is invoked
#with the same information that came from the XML::Parser event
#but is also given an additional argument that is an accumulator
#variable to store data in. 
package Parse::MediaWikiDump::XML::Accumulator;

use warnings;
use strict;

sub new {
	my ($class) = @_;
	my $self = {};
	
	bless($self, $class);
}

sub engine {
	shift(@_);
	return Parse::MediaWikiDump::XML::Accumulator::Engine->new(@_);
}

sub node {
	shift(@_);
	return Parse::MediaWikiDump::XML::Accumulator::Node->new(@_);
}

sub root {
	shift(@_);
	return Parse::MediaWikiDump::XML::Accumulator::Root->new(@_);
	
}

sub textcapture {
	shift(@_);
	return Parse::MediaWikiDump::XML::Accumulator::TextCapture->new(@_);
}

package Parse::MediaWikiDump::XML::Accumulator::Engine;

use strict; 
use warnings;
use Carp qw(croak);

use Scalar::Util qw(weaken);
use XML::Parser;

sub new {
	my ($class, $root, $accum) = @_;
	my $self = {};
	
	croak "must specify a tree root" unless defined $root;
	
	eval { $root->validate; };
	die "root node failed validation: $@" if $@;
	
	bless($self, $class);
		
	$self->{parser} = $self->init_parser;
	$self->{root} = $root;
	$self->{element_stack} = [];
	$self->{accum} = $accum;
	$self->{char_buf} = [];
	$self->{node_stack} = [ $root ];
	
	return $self;
}

sub init_parser {
	my ($self) = @_;
	
	#stop a giant memory leak
	weaken($self);
	
	my $parser = XML::Parser->new(
		Handlers => {
			#Init => sub { handle_init_event($self, @_) },
			#Final => sub { handle_final_event($self, @_) },
			Start => sub { handle_start_event($self, @_) },
			End => sub { handle_end_event($self, @_) },
			Char => sub { handle_char_event($self, @_); },
		}
	);
	
	return $parser;	
}

sub parser {
	my ($self) = @_;
	
	return $self->{parser};
}

sub handle_init_event {
	my ($self, $expat) = @_;
	my $root = $self->{root};
	my $handlers = $root->{handlers};
	
	if (defined(my $cb = $handlers->{Init})) {
		&cb($self);
	}
}

sub handle_final_event {
	my ($self, $expat) = @_;
	my $root = $self->{root};
	my $handlers = $root->{handlers};
	
	if (defined(my $cb = $handlers->{Final})) {
		&cb($self);
	}
}

sub handle_start_event {
	my ($self, $expat, $element, %attrs) = @_;
	my $element_stack = $self->{element_stack};
	my $node = $self->node;
	my $matched = $node->{children}->{$element};
	my $handler; 
	
	$handler = $matched->{handlers}->{Start};
	
	$self->flush_chars;	
	defined $handler && &$handler($self, $self->{accum}, $element, \%attrs);
		
	push(@{$self->{node_stack}}, $matched);
	push(@$element_stack, [$element, \%attrs]);
	
}

sub handle_end_event {
	my ($self, $expat, $element) = @_;
	my $handler = $self->node->{handlers}->{End};
	my $node_stack = $self->{node_stack};
	
	$self->flush_chars;

	defined $handler && &$handler($self, $self->{accum}, @{$self->element});
	
	pop(@$node_stack);
	pop(@{$self->{element_stack}});
	
}

sub handle_char_event {
	push(@{$_[0]->{char_buf}}, $_[2]); 
}

sub flush_chars {
	my ($self) = @_;
	my ($handler, $cur_element);
	
	$handler = $self->node->{handlers}->{Character};
	$cur_element = $self->element;
	
	if (! defined($cur_element = $self->element)) {
		$cur_element = [];
	}
	
	defined $handler && &$handler($self, $self->{accum}, join('', @{$self->{char_buf}}), @$cur_element);
		
	$self->{char_buf} = [];
	
	return undef;
}

sub node {
	my ($self) = @_;
	my $stack = $self->{node_stack};
	my $size = scalar(@$stack);

	return $$stack[$size - 1];
}

sub element {
	my ($self) = @_;
	my $stack = $self->{element_stack};
	my $size = scalar(@$stack);
	my $return = $$stack[$size - 1];
	
	return $return;
}

sub accumulator {
	my ($self, $new) = @_;
	
	if (defined($new)) {
		$self->{accum} = $new;
	}	
	
	return $self->{accum};
}

package Parse::MediaWikiDump::XML::Accumulator::Node;

use strict;
use warnings;

use Carp qw(croak cluck);

sub new {
	my ($class, $name, %handlers)	= @_;
	my $self = {};
	
	croak("must specify a node name") unless defined $name;
	
	$self->{name} = $name;
	$self->{handlers} = \%handlers;
	$self->{children} = {};
	$self->{debug} = 1;
	
	bless($self, $class);
	
	return $self;
}

sub name {
	my ($self) = @_;
	return $self->{name};
}

sub handlers {
	my ($self) = @_;
	return $self->{handlers};
}

sub unset_handlers {
	my ($self) = @_;
	
	$self->{handlers} = undef;
	
	foreach (values(%{ $self->{children} })) {
		$_->unset_handlers;
	}
	
	return 1;
}

sub error {
	my ($self, $path, $string) = @_;
	my $name = $self->{name};
	
	if (ref($path) ne 'ARRAY') {
		cluck "must specify an array ref for node path in tree";
	}
	
	if ($self->{debug}) {
		print "Fatal error in node $name: $string\n";
		print "Node tree path:\n";
		
		$self->print_path($path);
	}
		
	die "fatal error: $string";
}

sub print_path {
	my ($self, $path) = @_;
	my $i = 0;
	
	foreach (@$path) {
			my ($name) = $_->name;
			print "$i: $name\n";	
	}
	
	return undef;
}

sub validate {
	my ($self, $path) = @_;
	my ($handlers) = $self->{handlers};
	my (%ok);
	
	map({$ok{$_} = 1} $self->ok_handlers);
	
	if (! defined($path)) {
		$path = [];
	}
	
	push(@$path, $self);
	
	foreach (keys(%$handlers)) {
		my $check = $handlers->{$_};
		
		if (! defined($check) || ref($check) ne 'CODE') {
			$self->error($path, "Handler $_: not a code reference");
			next;
		}
		
		if (! $ok{$_}) {
			$self->error($path, "$_ is not a valid event name");
			next;
		}
	}
	
	foreach (values(%{$self->{children}})) {
		$_->validate($path);
	}

	return undef;
}

sub ok_handlers {
		return qw(Character Start End);
	
}

sub print {
	my ($self, $level) = @_;
	
	if (! defined($level)) {
		$level = 1;
	}	

	print '  ' x $level, "$level: ", $self->name, "\n";
	
	$level++;
	
	foreach (values(%{$self->{children} } )) {
		$_->print($level);
	}
	
	$level--;
}

sub add_child {
	my ($self, @children) = @_;
	
	foreach my $child (@children) {
			my $name = $child->{name};
			$self->{children}->{$name} = $child;	
	}
	
	return $self;
}

package Parse::MediaWikiDump::XML::Accumulator::Root;

use strict; 
use warnings;

use base qw(Parse::MediaWikiDump::XML::Accumulator::Node);

sub new {
	my ($class) = @_;
	my $self = $class->SUPER::new('[root container]');
	
	bless($self, $class);
}

sub ok_handlers {
		return qw(Init Final);
}

package Parse::MediaWikiDump::XML::Accumulator::TextCapture;

use base qw(Parse::MediaWikiDump::XML::Accumulator::Node);

use strict;
use warnings;

sub new {
	my ($class, $name, $store_as) = @_;
	my $self = $class->SUPER::new($name);
		
	bless($self, $class);

	if (! defined($store_as)) {
		$store_as = $name;		
	}
	
	$self->{handlers} = {
		Character => sub { char_handler($store_as, @_); }, 
	};
	
	return $self;	
}

sub char_handler {
	my ($store_as, $parser, $a, $chars, $element) = @_;
	
	$a->{$store_as} = $chars;
}

1;