This file is indexed.

/usr/share/perl5/XML/XPath/Function.pm is in libxml-xpath-perl 1.40-1.

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
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
package XML::XPath::Function;

$VERSION = '1.40';

use XML::XPath::Number;
use XML::XPath::Literal;
use XML::XPath::Boolean;
use XML::XPath::NodeSet;
use XML::XPath::Node::Attribute;
use strict; use warnings;

sub new {
    my $class = shift;
    my ($pp, $name, $params) = @_;
    bless {
        pp => $pp,
        name => $name,
        params => $params
        }, $class;
}

sub as_string {
    my $self = shift;
    my $string = $self->{name} . "(";
    my $second;
    foreach (@{$self->{params}}) {
        $string .= "," if $second++;
        $string .= $_->as_string;
    }
    $string .= ")";
    return $string;
}

sub as_xml {
    my $self = shift;
    my $string = "<Function name=\"$self->{name}\"";
    my $params = "";
    foreach (@{$self->{params}}) {
        $params .= "<Param>" . $_->as_string . "</Param>\n";
    }
    if ($params) {
        $string .= ">\n$params</Function>\n";
    }
    else {
        $string .= " />\n";
    }

    return $string;
}

sub evaluate {
    my $self = shift;
    my $node = shift;
    if ($node->isa('XML::XPath::NodeSet')) {
        $node = $node->get_node(1);
    }
    my @params;
    foreach my $param (@{$self->{params}}) {
        my $results = $param->evaluate($node);
        push @params, $results;
    }
    $self->_execute($self->{name}, $node, @params);
}

sub _execute {
    my $self = shift;
    my ($name, $node, @params) = @_;
    $name =~ s/-/_/g;
    no strict 'refs';
    $self->$name($node, @params);
}

# All functions should return one of:
# XML::XPath::Number
# XML::XPath::Literal (string)
# XML::XPath::NodeSet
# XML::XPath::Boolean

### NODESET FUNCTIONS ###

sub last {
    my $self = shift;
    my ($node, @params) = @_;
    die "last: function doesn't take parameters\n" if (@params);
    return XML::XPath::Number->new($self->{pp}->get_context_size);
}

sub position {
    my $self = shift;
    my ($node, @params) = @_;
    if (@params) {
        die "position: function doesn't take parameters [ ", @params, " ]\n";
    }
    # return pos relative to axis direction
    return XML::XPath::Number->new($self->{pp}->get_context_pos);
}

sub count {
    my $self = shift;
    my ($node, @params) = @_;
    die "count: Parameter must be a NodeSet\n" unless $params[0]->isa('XML::XPath::NodeSet');
    return XML::XPath::Number->new($params[0]->size);
}

sub id {
    my $self = shift;
    my ($node, @params) = @_;
    die "id: Function takes 1 parameter\n" unless @params == 1;
    my $results = XML::XPath::NodeSet->new();
    if ($params[0]->isa('XML::XPath::NodeSet')) {
        # result is the union of applying id() to the
        # string value of each node in the nodeset.
        foreach my $node ($params[0]->get_nodelist) {
            my $string = $node->string_value;
            $results->append($self->id($node, XML::XPath::Literal->new($string)));
        }
    }
    else { # The actual id() function...
        my $string = $self->string($node, $params[0]);
        $_ = $string->value; # get perl scalar
        my @ids = split; # splits $_
        foreach my $id (@ids) {
            if (my $found = $node->getElementById($id)) {
                $results->push($found);
            }
        }
    }
    return $results;
}

sub local_name {
    my $self = shift;
    my ($node, @params) = @_;
    if (@params > 1) {
        die "name() function takes one or no parameters\n";
    }
    elsif (@params) {
        my $nodeset = shift(@params);
        $node = $nodeset->get_node(1);
    }

    return XML::XPath::Literal->new($node->getLocalName);
}

sub namespace_uri {
    my $self = shift;
    my ($node, @params) = @_;

    if (@params > 1) {
        die "namespace_uri() function takes one or no parameters\n";
    }
    elsif (@params) {
        my $nodeset = shift(@params);
        $node = $nodeset->get_node(1);
    }

    # Sets to xmlns:[name]="namespace" or xmlns="namespace"
    my $namespace = $node->getNamespace->toString;
    # We only need data between the quotation marks
    $namespace =~ /\"(.*?)\"/;

    return XML::XPath::Literal->new($1);
}

sub name {
    my $self = shift;
    my ($node, @params) = @_;
    if (@params > 1) {
        die "name() function takes one or no parameters\n";
    }
    elsif (@params) {
        my $nodeset = shift(@params);
        $node = $nodeset->get_node(1);
    }

    return XML::XPath::Literal->new($node->getName);
}

### STRING FUNCTIONS ###

sub string {
    my $self = shift;
    my ($node, @params) = @_;
    die "string: Too many parameters\n" if @params > 1;
    if (@params) {
        return XML::XPath::Literal->new($params[0]->string_value);
    }

    # TODO - this MUST be wrong! - not sure now. -matt
    return XML::XPath::Literal->new($node->string_value);
    # default to nodeset with just $node in.
}

sub concat {
    my $self = shift;
    my ($node, @params) = @_;
    die "concat: Too few parameters\n" if @params < 2;
    my $string = join('', map {$_->string_value} @params);
    return XML::XPath::Literal->new($string);
}

sub starts_with {
    my $self = shift;
    my ($node, @params) = @_;
    die "starts-with: incorrect number of params\n" unless @params == 2;
    my ($string1, $string2) = ($params[0]->string_value, $params[1]->string_value);
    if (substr($string1, 0, length($string2)) eq $string2) {
        return XML::XPath::Boolean->True;
    }
    return XML::XPath::Boolean->False;
}

sub contains {
    my $self = shift;
    my ($node, @params) = @_;
    die "starts-with: incorrect number of params\n" unless @params == 2;
    my $value = $params[1]->string_value;

    if (defined $value && ($params[0]->string_value =~ /(.*?)\Q$value\E(.*)/)) {
        # Store the values of contains1, contains2 for use in the
        # substring functions below
        $self->{contains1} = $1;
        $self->{contains2} = $2;
        return XML::XPath::Boolean->True;
    }
    return XML::XPath::Boolean->False;
}

sub substring_before {
    my $self = shift;
    my ($node, @params) = @_;
    die "starts-with: incorrect number of params\n" unless @params == 2;
    if ($self->contains($node, @params)->value) {
        return XML::XPath::Literal->new($self->{contains1});
    }
    else {
        return XML::XPath::Literal->new('');
    }
}

sub substring_after {
    my $self = shift;
    my ($node, @params) = @_;
    die "starts-with: incorrect number of params\n" unless @params == 2;
    if ($self->contains($node, @params)->value) {
        return XML::XPath::Literal->new($self->{contains2});
    }
    else {
        return XML::XPath::Literal->new('');
    }
}

sub substring {
    my $self = shift;
    my ($node, @params) = @_;
    die "substring: Wrong number of parameters\n" if (@params < 2 || @params > 3);
    my ($str, $offset, $len);
    $str = $params[0]->string_value;
    $offset = $params[1]->value;

    if ($offset eq 'NaN') {
        return XML::XPath::Literal->new('');
    }

    require POSIX;
    if (@params == 3) {
        $len = $params[2]->value;

        if (($len eq 'NaN') || (($offset =~ /Infinity/) && ($len eq 'Infinity'))) {
            return XML::XPath::Literal->new('');
        }

        if ($offset ne 'Infinity') {
            $offset--; # uses 1 based offsets
            $offset = POSIX::floor($offset + 0.5); # round.
            if ($offset < 0) {
                if ($len ne 'Infinity') {
                    $len += $offset;
                }
                else {
                    $len = length($str);
                }
                $offset = 0;
            }
            else {
                if ($len eq 'Infinity') {
                    return XML::XPath::Literal->new('');
                }
            }
        }
        else {
            return XML::XPath::Literal->new('');
        }

        if ($len eq 'Infinity') {
            $len = length($str);
        }

        $len = POSIX::floor($len + 0.5); # round.

        return XML::XPath::Literal->new(substr($str, $offset, $len));
    } else {
        $offset--; # uses 1 based offsets
        $offset = POSIX::floor($offset + 0.5); # round.

        if ($offset < 0) {
            $offset = 0;
        }

        return XML::XPath::Literal->new(substr($str, $offset));
    }
}

sub string_length {
    my $self = shift;
    my ($node, @params) = @_;
    die "string-length: Wrong number of params\n" if @params > 1;
    if (@params) {
        return XML::XPath::Number->new(length($params[0]->string_value));
    }
    else {
        return XML::XPath::Number->new(
                length($node->string_value)
                );
    }
}

sub normalize_space {
    my $self = shift;
    my ($node, @params) = @_;
    die "normalize-space: Wrong number of params\n" if @params > 1;
    my $str;
    if (@params) {
        $str = $params[0]->string_value;
    }
    else {
        $str = $node->string_value;
    }
    $str =~ s/^\s*//;
    $str =~ s/\s*$//;
    $str =~ s/\s+/ /g;
    return XML::XPath::Literal->new($str);
}

sub translate {
    my $self = shift;
    my ($node, @params) = @_;
    die "translate: Wrong number of params\n" if @params != 3;
    local $_ = $params[0]->string_value;
    my $find = $params[1]->string_value;
    my $repl = $params[2]->string_value;
    if (length($find) == length($repl)) {
        eval "tr/\Q$find\E/\Q$repl\E/";
    }
    else {
        eval "tr/\Q$find\E/\Q$repl\E/d";
    }
    die $@ if $@;
    return XML::XPath::Literal->new($_);
}

### BOOLEAN FUNCTIONS ###

sub boolean {
    my $self = shift;
    my ($node, @params) = @_;
    die "boolean: Incorrect number of parameters\n" if @params != 1;
    return $params[0]->to_boolean;
}

sub not {
    my $self = shift;
    my ($node, @params) = @_;
    $params[0] = $params[0]->to_boolean unless $params[0]->isa('XML::XPath::Boolean');
    $params[0]->value ? XML::XPath::Boolean->False : XML::XPath::Boolean->True;
}

sub true {
    my $self = shift;
    my ($node, @params) = @_;
    die "true: function takes no parameters\n" if @params > 0;
    XML::XPath::Boolean->True;
}

sub false {
    my $self = shift;
    my ($node, @params) = @_;
    die "true: function takes no parameters\n" if @params > 0;
    XML::XPath::Boolean->False;
}

sub lang {
    my $self = shift;
    my ($node, @params) = @_;
    die "lang: function takes 1 parameter\n" if @params != 1;
    my $lang = $node->findvalue('(ancestor-or-self::*[@xml:lang]/@xml:lang)[last()]');
    my $lclang = lc($params[0]->string_value);
    # warn("Looking for lang($lclang) in $lang\n");
    if (substr(lc($lang), 0, length($lclang)) eq $lclang) {
        return XML::XPath::Boolean->True;
    }
    else {
        return XML::XPath::Boolean->False;
    }
}

### NUMBER FUNCTIONS ###

sub number {
    my $self = shift;
    my ($node, @params) = @_;
    die "number: Too many parameters\n" if @params > 1;
    if (@params) {
        if ($params[0]->isa('XML::XPath::Node')) {
            return XML::XPath::Number->new(
                    $params[0]->string_value
                    );
        }
        return $params[0]->to_number;
    }

    return XML::XPath::Number->new( $node->string_value );
}

sub sum {
    my $self = shift;
    my ($node, @params) = @_;
    die "sum: Parameter must be a NodeSet\n" unless $params[0]->isa('XML::XPath::NodeSet');
    my $sum = 0;
    foreach my $node ($params[0]->get_nodelist) {
        $sum += $self->number($node)->value;
    }
    return XML::XPath::Number->new($sum);
}

sub floor {
    my $self = shift;
    my ($node, @params) = @_;
    require POSIX;
    my $num = $self->number($node, @params);
    return XML::XPath::Number->new(
            POSIX::floor($num->value));
}

sub ceiling {
    my $self = shift;
    my ($node, @params) = @_;
    require POSIX;
    my $num = $self->number($node, @params);
    return XML::XPath::Number->new(
            POSIX::ceil($num->value));
}

sub round {
    my $self = shift;
    my ($node, @params) = @_;
    my $num = $self->number($node, @params);
    require POSIX;
    return XML::XPath::Number->new(
            POSIX::floor($num->value + 0.5)); # Yes, I know the spec says don't do this...
}

1;