Commit | Line | Data |
6fe26b29 |
1 | package DBM::Deep::Array; |
2 | |
b48ae6ec |
3 | use 5.006_000; |
460b1067 |
4 | |
6fe26b29 |
5 | use strict; |
460b1067 |
6 | use warnings; |
6fe26b29 |
7 | |
fbd470e4 |
8 | our $VERSION = q(1.0001); |
86867f3a |
9 | |
8fec41b9 |
10 | # This is to allow DBM::Deep::Array to handle negative indices on |
11 | # its own. Otherwise, Perl would intercept the call to negative |
12 | # indices for us. This was causing bugs for negative index handling. |
460b1067 |
13 | our $NEGATIVE_INDICES = 1; |
7910cf68 |
14 | |
6fe26b29 |
15 | use base 'DBM::Deep'; |
16 | |
e1b265cc |
17 | use Scalar::Util (); |
18 | |
596e9574 |
19 | sub _get_self { |
8db25060 |
20 | eval { local $SIG{'__DIE__'}; tied( @{$_[0]} ) } || $_[0] |
596e9574 |
21 | } |
22 | |
f9c33187 |
23 | sub _repr { shift;[ @_ ] } |
24 | |
25 | sub _import { |
26 | my $self = shift; |
27 | my ($struct) = @_; |
28 | |
9a63e1f2 |
29 | $self->push( @$struct ); |
f9c33187 |
30 | |
31 | return 1; |
32 | } |
9a63e1f2 |
33 | |
6fe26b29 |
34 | sub TIEARRAY { |
6fe26b29 |
35 | my $class = shift; |
0ca7ea98 |
36 | my $args = $class->_get_args( @_ ); |
504185fb |
37 | |
38 | $args->{type} = $class->TYPE_ARRAY; |
39 | |
40 | return $class->_init($args); |
6fe26b29 |
41 | } |
42 | |
7f441181 |
43 | sub FETCH { |
eea0d863 |
44 | my $self = shift->_get_self; |
45 | my ($key) = @_; |
7f441181 |
46 | |
504185fb |
47 | $self->lock( $self->LOCK_SH ); |
9a187d8c |
48 | |
9a63e1f2 |
49 | if ( !defined $key ) { |
50 | DBM::Deep->_throw_error( "Cannot use an undefined array index." ); |
51 | } |
52 | elsif ( $key =~ /^-?\d+$/ ) { |
7f441181 |
53 | if ( $key < 0 ) { |
54 | $key += $self->FETCHSIZE; |
9281d66b |
55 | unless ( $key >= 0 ) { |
56 | $self->unlock; |
57 | return; |
58 | } |
7f441181 |
59 | } |
c3aafc14 |
60 | } |
9a63e1f2 |
61 | elsif ( $key ne 'length' ) { |
62 | $self->unlock; |
63 | DBM::Deep->_throw_error( "Cannot use '$key' as an array index." ); |
7f441181 |
64 | } |
65 | |
9a63e1f2 |
66 | my $rv = $self->SUPER::FETCH( $key ); |
9281d66b |
67 | |
68 | $self->unlock; |
69 | |
70 | return $rv; |
7f441181 |
71 | } |
72 | |
cb79ec85 |
73 | sub STORE { |
74 | my $self = shift->_get_self; |
75 | my ($key, $value) = @_; |
76 | |
9281d66b |
77 | $self->lock( $self->LOCK_EX ); |
78 | |
9ab67b8c |
79 | my $size; |
c3aafc14 |
80 | my $idx_is_numeric; |
9a63e1f2 |
81 | if ( !defined $key ) { |
82 | DBM::Deep->_throw_error( "Cannot use an undefined array index." ); |
83 | } |
84 | elsif ( $key =~ /^-?\d+$/ ) { |
c3aafc14 |
85 | $idx_is_numeric = 1; |
cb79ec85 |
86 | if ( $key < 0 ) { |
9ab67b8c |
87 | $size = $self->FETCHSIZE; |
c3aafc14 |
88 | if ( $key + $size < 0 ) { |
89 | die( "Modification of non-creatable array value attempted, subscript $key" ); |
baa27ab6 |
90 | } |
c3aafc14 |
91 | $key += $size |
cb79ec85 |
92 | } |
cb79ec85 |
93 | } |
9a63e1f2 |
94 | elsif ( $key ne 'length' ) { |
95 | $self->unlock; |
96 | DBM::Deep->_throw_error( "Cannot use '$key' as an array index." ); |
97 | } |
cb79ec85 |
98 | |
9a63e1f2 |
99 | my $rv = $self->SUPER::STORE( $key, $value ); |
cb79ec85 |
100 | |
c3aafc14 |
101 | if ( $idx_is_numeric ) { |
9ab67b8c |
102 | $size = $self->FETCHSIZE unless defined $size; |
c3aafc14 |
103 | if ( $key >= $size ) { |
104 | $self->STORESIZE( $key + 1 ); |
9ab67b8c |
105 | } |
cb79ec85 |
106 | } |
107 | |
9281d66b |
108 | $self->unlock; |
109 | |
cb79ec85 |
110 | return $rv; |
111 | } |
112 | |
baa27ab6 |
113 | sub EXISTS { |
eea0d863 |
114 | my $self = shift->_get_self; |
115 | my ($key) = @_; |
baa27ab6 |
116 | |
504185fb |
117 | $self->lock( $self->LOCK_SH ); |
9281d66b |
118 | |
9a63e1f2 |
119 | if ( !defined $key ) { |
120 | DBM::Deep->_throw_error( "Cannot use an undefined array index." ); |
121 | } |
122 | elsif ( $key =~ /^-?\d+$/ ) { |
baa27ab6 |
123 | if ( $key < 0 ) { |
124 | $key += $self->FETCHSIZE; |
9281d66b |
125 | unless ( $key >= 0 ) { |
126 | $self->unlock; |
127 | return; |
128 | } |
129 | } |
9281d66b |
130 | } |
9a63e1f2 |
131 | elsif ( $key ne 'length' ) { |
132 | $self->unlock; |
133 | DBM::Deep->_throw_error( "Cannot use '$key' as an array index." ); |
134 | } |
9281d66b |
135 | |
136 | my $rv = $self->SUPER::EXISTS( $key ); |
137 | |
138 | $self->unlock; |
139 | |
140 | return $rv; |
141 | } |
142 | |
143 | sub DELETE { |
eea0d863 |
144 | my $self = shift->_get_self; |
145 | my ($key) = @_; |
9281d66b |
146 | |
9281d66b |
147 | $self->lock( $self->LOCK_EX ); |
148 | |
149 | my $size = $self->FETCHSIZE; |
9a63e1f2 |
150 | if ( !defined $key ) { |
151 | DBM::Deep->_throw_error( "Cannot use an undefined array index." ); |
152 | } |
153 | elsif ( $key =~ /^-?\d+$/ ) { |
9281d66b |
154 | if ( $key < 0 ) { |
155 | $key += $size; |
156 | unless ( $key >= 0 ) { |
157 | $self->unlock; |
158 | return; |
159 | } |
baa27ab6 |
160 | } |
baa27ab6 |
161 | } |
9a63e1f2 |
162 | elsif ( $key ne 'length' ) { |
163 | $self->unlock; |
164 | DBM::Deep->_throw_error( "Cannot use '$key' as an array index." ); |
165 | } |
baa27ab6 |
166 | |
c3aafc14 |
167 | my $rv = $self->SUPER::DELETE( $key ); |
9281d66b |
168 | |
c3aafc14 |
169 | if ($rv && $key == $size - 1) { |
9a63e1f2 |
170 | $self->STORESIZE( $key ); |
504185fb |
171 | } |
9281d66b |
172 | |
173 | $self->unlock; |
174 | |
175 | return $rv; |
baa27ab6 |
176 | } |
177 | |
9a63e1f2 |
178 | # Now that we have a real Reference sector, we should store arrayzize there. However, |
179 | # arraysize needs to be transactionally-aware, so a simple location to store it isn't |
180 | # going to work. |
6fe26b29 |
181 | sub FETCHSIZE { |
9281d66b |
182 | my $self = shift->_get_self; |
183 | |
184 | $self->lock( $self->LOCK_SH ); |
185 | |
83371fe3 |
186 | my $SAVE_FILTER = $self->_storage->{filter_fetch_value}; |
187 | $self->_storage->{filter_fetch_value} = undef; |
504185fb |
188 | |
9a63e1f2 |
189 | my $size = $self->FETCH('length') || 0; |
504185fb |
190 | |
83371fe3 |
191 | $self->_storage->{filter_fetch_value} = $SAVE_FILTER; |
504185fb |
192 | |
9281d66b |
193 | $self->unlock; |
194 | |
9a63e1f2 |
195 | return $size; |
6fe26b29 |
196 | } |
197 | |
198 | sub STORESIZE { |
eea0d863 |
199 | my $self = shift->_get_self; |
504185fb |
200 | my ($new_length) = @_; |
201 | |
9281d66b |
202 | $self->lock( $self->LOCK_EX ); |
203 | |
83371fe3 |
204 | my $SAVE_FILTER = $self->_storage->{filter_store_value}; |
205 | $self->_storage->{filter_store_value} = undef; |
504185fb |
206 | |
9a63e1f2 |
207 | my $result = $self->STORE('length', $new_length, 'length'); |
504185fb |
208 | |
83371fe3 |
209 | $self->_storage->{filter_store_value} = $SAVE_FILTER; |
504185fb |
210 | |
9281d66b |
211 | $self->unlock; |
212 | |
504185fb |
213 | return $result; |
6fe26b29 |
214 | } |
215 | |
216 | sub POP { |
eea0d863 |
217 | my $self = shift->_get_self; |
9281d66b |
218 | |
219 | $self->lock( $self->LOCK_EX ); |
220 | |
504185fb |
221 | my $length = $self->FETCHSIZE(); |
222 | |
223 | if ($length) { |
224 | my $content = $self->FETCH( $length - 1 ); |
225 | $self->DELETE( $length - 1 ); |
9281d66b |
226 | |
227 | $self->unlock; |
228 | |
504185fb |
229 | return $content; |
230 | } |
231 | else { |
9281d66b |
232 | $self->unlock; |
504185fb |
233 | return; |
234 | } |
6fe26b29 |
235 | } |
236 | |
237 | sub PUSH { |
2ac02042 |
238 | my $self = shift->_get_self; |
504185fb |
239 | |
9281d66b |
240 | $self->lock( $self->LOCK_EX ); |
241 | |
504185fb |
242 | my $length = $self->FETCHSIZE(); |
9281d66b |
243 | |
504185fb |
244 | while (my $content = shift @_) { |
245 | $self->STORE( $length, $content ); |
246 | $length++; |
247 | } |
8f6d6ed0 |
248 | |
9281d66b |
249 | $self->unlock; |
250 | |
8f6d6ed0 |
251 | return $length; |
6fe26b29 |
252 | } |
253 | |
7ffc75ae |
254 | sub _move_value { |
255 | my $self = shift; |
256 | my ($old_key, $new_key) = @_; |
257 | |
258 | my $val = $self->FETCH( $old_key ); |
259 | if ( eval { $val->isa( 'DBM::Deep::Hash' ) } ) { |
260 | $self->STORE( $new_key, { %$val } ); |
261 | } |
262 | elsif ( eval { $val->isa( 'DBM::Deep::Array' ) } ) { |
263 | $self->STORE( $new_key, [ @$val ] ); |
264 | } |
265 | else { |
266 | $self->STORE( $new_key, $val ); |
267 | } |
268 | } |
269 | |
6fe26b29 |
270 | sub SHIFT { |
eea0d863 |
271 | my $self = shift->_get_self; |
9281d66b |
272 | |
273 | $self->lock( $self->LOCK_EX ); |
274 | |
504185fb |
275 | my $length = $self->FETCHSIZE(); |
276 | |
277 | if ($length) { |
278 | my $content = $self->FETCH( 0 ); |
279 | |
280 | for (my $i = 0; $i < $length - 1; $i++) { |
7ffc75ae |
281 | $self->_move_value( $i+1, $i ); |
504185fb |
282 | } |
283 | $self->DELETE( $length - 1 ); |
9281d66b |
284 | |
285 | $self->unlock; |
504185fb |
286 | |
287 | return $content; |
288 | } |
289 | else { |
9281d66b |
290 | $self->unlock; |
504185fb |
291 | return; |
292 | } |
6fe26b29 |
293 | } |
294 | |
295 | sub UNSHIFT { |
2ac02042 |
296 | my $self = shift->_get_self; |
504185fb |
297 | my @new_elements = @_; |
9281d66b |
298 | |
299 | $self->lock( $self->LOCK_EX ); |
300 | |
504185fb |
301 | my $length = $self->FETCHSIZE(); |
302 | my $new_size = scalar @new_elements; |
303 | |
304 | if ($length) { |
305 | for (my $i = $length - 1; $i >= 0; $i--) { |
7ffc75ae |
306 | $self->_move_value( $i, $i+$new_size ); |
504185fb |
307 | } |
308 | } |
309 | |
310 | for (my $i = 0; $i < $new_size; $i++) { |
311 | $self->STORE( $i, $new_elements[$i] ); |
312 | } |
8f6d6ed0 |
313 | |
9281d66b |
314 | $self->unlock; |
315 | |
8f6d6ed0 |
316 | return $length + $new_size; |
6fe26b29 |
317 | } |
318 | |
319 | sub SPLICE { |
2ac02042 |
320 | my $self = shift->_get_self; |
9281d66b |
321 | |
322 | $self->lock( $self->LOCK_EX ); |
323 | |
504185fb |
324 | my $length = $self->FETCHSIZE(); |
325 | |
326 | ## |
327 | # Calculate offset and length of splice |
328 | ## |
329 | my $offset = shift; |
714618f0 |
330 | $offset = 0 unless defined $offset; |
504185fb |
331 | if ($offset < 0) { $offset += $length; } |
332 | |
333 | my $splice_length; |
334 | if (scalar @_) { $splice_length = shift; } |
335 | else { $splice_length = $length - $offset; } |
336 | if ($splice_length < 0) { $splice_length += ($length - $offset); } |
337 | |
338 | ## |
339 | # Setup array with new elements, and copy out old elements for return |
340 | ## |
341 | my @new_elements = @_; |
342 | my $new_size = scalar @new_elements; |
343 | |
df3c5701 |
344 | my @old_elements = map { |
345 | $self->FETCH( $_ ) |
346 | } $offset .. ($offset + $splice_length - 1); |
504185fb |
347 | |
348 | ## |
349 | # Adjust array length, and shift elements to accomodate new section. |
350 | ## |
6fe26b29 |
351 | if ( $new_size != $splice_length ) { |
352 | if ($new_size > $splice_length) { |
353 | for (my $i = $length - 1; $i >= $offset + $splice_length; $i--) { |
7ffc75ae |
354 | $self->_move_value( $i, $i + ($new_size - $splice_length) ); |
6fe26b29 |
355 | } |
356 | } |
357 | else { |
358 | for (my $i = $offset + $splice_length; $i < $length; $i++) { |
7ffc75ae |
359 | $self->_move_value( $i, $i + ($new_size - $splice_length) ); |
6fe26b29 |
360 | } |
361 | for (my $i = 0; $i < $splice_length - $new_size; $i++) { |
362 | $self->DELETE( $length - 1 ); |
363 | $length--; |
364 | } |
365 | } |
504185fb |
366 | } |
367 | |
368 | ## |
369 | # Insert new elements into array |
370 | ## |
371 | for (my $i = $offset; $i < $offset + $new_size; $i++) { |
372 | $self->STORE( $i, shift @new_elements ); |
373 | } |
374 | |
9281d66b |
375 | $self->unlock; |
376 | |
504185fb |
377 | ## |
378 | # Return deleted section, or last element in scalar context. |
379 | ## |
380 | return wantarray ? @old_elements : $old_elements[-1]; |
6fe26b29 |
381 | } |
382 | |
9a63e1f2 |
383 | # We don't need to populate it, yet. |
460b1067 |
384 | # It will be useful, though, when we split out HASH and ARRAY |
685e40f1 |
385 | sub EXTEND { |
504185fb |
386 | ## |
387 | # Perl will call EXTEND() when the array is likely to grow. |
388 | # We don't care, but include it because it gets called at times. |
389 | ## |
685e40f1 |
390 | } |
6fe26b29 |
391 | |
f9c33187 |
392 | sub _copy_node { |
898fd1fd |
393 | my $self = shift; |
f9c33187 |
394 | my ($db_temp) = @_; |
395 | |
396 | my $length = $self->length(); |
397 | for (my $index = 0; $index < $length; $index++) { |
398 | my $value = $self->get($index); |
399 | $self->_copy_value( \$db_temp->[$index], $value ); |
400 | } |
401 | |
402 | return 1; |
403 | } |
404 | |
6fe26b29 |
405 | ## |
406 | # Public method aliases |
407 | ## |
f9c33187 |
408 | sub length { (shift)->FETCHSIZE(@_) } |
409 | sub pop { (shift)->POP(@_) } |
410 | sub push { (shift)->PUSH(@_) } |
411 | sub unshift { (shift)->UNSHIFT(@_) } |
412 | sub splice { (shift)->SPLICE(@_) } |
413 | |
414 | # This must be last otherwise we have to qualify all other calls to shift |
415 | # as calls to CORE::shift |
f75b719e |
416 | sub shift { (CORE::shift)->SHIFT(@_) } |
6fe26b29 |
417 | |
418 | 1; |
419 | __END__ |