-
Notifications
You must be signed in to change notification settings - Fork 7.7k
/
spl_dllist.c
1376 lines (1104 loc) · 38.4 KB
/
spl_dllist.c
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
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2011 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Etienne Kneuss <colder@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "zend_exceptions.h"
#include "zend_hash.h"
#include "php_spl.h"
#include "ext/standard/info.h"
#include "ext/standard/php_var.h"
#include "ext/standard/php_smart_str.h"
#include "spl_functions.h"
#include "spl_engine.h"
#include "spl_iterators.h"
#include "spl_dllist.h"
#include "spl_exceptions.h"
zend_object_handlers spl_handler_SplDoublyLinkedList;
PHPAPI zend_class_entry *spl_ce_SplDoublyLinkedList;
PHPAPI zend_class_entry *spl_ce_SplQueue;
PHPAPI zend_class_entry *spl_ce_SplStack;
#define SPL_LLIST_DELREF(elem) if(!--(elem)->rc) { \
efree(elem); \
elem = NULL; \
}
#define SPL_LLIST_CHECK_DELREF(elem) if((elem) && !--(elem)->rc) { \
efree(elem); \
elem = NULL; \
}
#define SPL_LLIST_ADDREF(elem) (elem)->rc++
#define SPL_LLIST_CHECK_ADDREF(elem) if(elem) (elem)->rc++
#define SPL_DLLIST_IT_DELETE 0x00000001 /* Delete flag makes the iterator delete the current element on next */
#define SPL_DLLIST_IT_LIFO 0x00000002 /* LIFO flag makes the iterator traverse the structure as a LastInFirstOut */
#define SPL_DLLIST_IT_MASK 0x00000003 /* Mask to isolate flags related to iterators */
#define SPL_DLLIST_IT_FIX 0x00000004 /* Backward/Forward bit is fixed */
#ifdef accept
#undef accept
#endif
typedef struct _spl_ptr_llist_element {
struct _spl_ptr_llist_element *prev;
struct _spl_ptr_llist_element *next;
int rc;
void *data;
} spl_ptr_llist_element;
typedef void (*spl_ptr_llist_dtor_func)(spl_ptr_llist_element * TSRMLS_DC);
typedef void (*spl_ptr_llist_ctor_func)(spl_ptr_llist_element * TSRMLS_DC);
typedef struct _spl_ptr_llist {
spl_ptr_llist_element *head;
spl_ptr_llist_element *tail;
spl_ptr_llist_dtor_func dtor;
spl_ptr_llist_ctor_func ctor;
int count;
} spl_ptr_llist;
typedef struct _spl_dllist_object spl_dllist_object;
typedef struct _spl_dllist_it spl_dllist_it;
struct _spl_dllist_object {
zend_object std;
spl_ptr_llist *llist;
int traverse_position;
spl_ptr_llist_element *traverse_pointer;
zval *retval;
int flags;
zend_function *fptr_offset_get;
zend_function *fptr_offset_set;
zend_function *fptr_offset_has;
zend_function *fptr_offset_del;
zend_function *fptr_count;
zend_class_entry *ce_get_iterator;
HashTable *debug_info;
};
/* define an overloaded iterator structure */
struct _spl_dllist_it {
zend_user_iterator intern;
int traverse_position;
spl_ptr_llist_element *traverse_pointer;
int flags;
spl_dllist_object *object;
};
/* {{{ spl_ptr_llist */
static void spl_ptr_llist_zval_dtor(spl_ptr_llist_element *elem TSRMLS_DC) { /* {{{ */
if (elem->data) {
zval_ptr_dtor((zval **)&elem->data);
}
}
/* }}} */
static void spl_ptr_llist_zval_ctor(spl_ptr_llist_element *elem TSRMLS_DC) { /* {{{ */
Z_ADDREF_P((zval *)elem->data);
}
/* }}} */
static spl_ptr_llist *spl_ptr_llist_init(spl_ptr_llist_ctor_func ctor, spl_ptr_llist_dtor_func dtor) /* {{{ */
{
spl_ptr_llist *llist = emalloc(sizeof(spl_ptr_llist));
llist->head = NULL;
llist->tail = NULL;
llist->count = 0;
llist->dtor = dtor;
llist->ctor = ctor;
return llist;
}
/* }}} */
static long spl_ptr_llist_count(spl_ptr_llist *llist) /* {{{ */
{
return (long)llist->count;
}
/* }}} */
static void spl_ptr_llist_destroy(spl_ptr_llist *llist TSRMLS_DC) /* {{{ */
{
spl_ptr_llist_element *current = llist->head, *next;
spl_ptr_llist_dtor_func dtor = llist->dtor;
while (current) {
next = current->next;
if(current && dtor) {
dtor(current TSRMLS_CC);
}
SPL_LLIST_DELREF(current);
current = next;
}
efree(llist);
}
/* }}} */
static spl_ptr_llist_element *spl_ptr_llist_offset(spl_ptr_llist *llist, long offset, int backward) /* {{{ */
{
spl_ptr_llist_element *current;
int pos = 0;
if (backward) {
current = llist->tail;
} else {
current = llist->head;
}
while (current && pos < offset) {
pos++;
if (backward) {
current = current->prev;
} else {
current = current->next;
}
}
return current;
}
/* }}} */
static void spl_ptr_llist_unshift(spl_ptr_llist *llist, void *data TSRMLS_DC) /* {{{ */
{
spl_ptr_llist_element *elem = emalloc(sizeof(spl_ptr_llist_element));
elem->data = data;
elem->rc = 1;
elem->prev = NULL;
elem->next = llist->head;
if (llist->head) {
llist->head->prev = elem;
} else {
llist->tail = elem;
}
llist->head = elem;
llist->count++;
if (llist->ctor) {
llist->ctor(elem TSRMLS_CC);
}
}
/* }}} */
static void spl_ptr_llist_push(spl_ptr_llist *llist, void *data TSRMLS_DC) /* {{{ */
{
spl_ptr_llist_element *elem = emalloc(sizeof(spl_ptr_llist_element));
elem->data = data;
elem->rc = 1;
elem->prev = llist->tail;
elem->next = NULL;
if (llist->tail) {
llist->tail->next = elem;
} else {
llist->head = elem;
}
llist->tail = elem;
llist->count++;
if (llist->ctor) {
llist->ctor(elem TSRMLS_CC);
}
}
/* }}} */
static void *spl_ptr_llist_pop(spl_ptr_llist *llist TSRMLS_DC) /* {{{ */
{
void *data;
spl_ptr_llist_element *tail = llist->tail;
if (tail == NULL) {
return NULL;
}
if (tail->prev) {
tail->prev->next = NULL;
} else {
llist->head = NULL;
}
llist->tail = tail->prev;
llist->count--;
data = tail->data;
if (llist->dtor) {
llist->dtor(tail TSRMLS_CC);
}
tail->data = NULL;
SPL_LLIST_DELREF(tail);
return data;
}
/* }}} */
static void *spl_ptr_llist_last(spl_ptr_llist *llist) /* {{{ */
{
spl_ptr_llist_element *tail = llist->tail;
if (tail == NULL) {
return NULL;
} else {
return tail->data;
}
}
/* }}} */
static void *spl_ptr_llist_first(spl_ptr_llist *llist) /* {{{ */
{
spl_ptr_llist_element *head = llist->head;
if (head == NULL) {
return NULL;
} else {
return head->data;
}
}
/* }}} */
static void *spl_ptr_llist_shift(spl_ptr_llist *llist TSRMLS_DC) /* {{{ */
{
void *data;
spl_ptr_llist_element *head = llist->head;
if (head == NULL) {
return NULL;
}
if (head->next) {
head->next->prev = NULL;
} else {
llist->tail = NULL;
}
llist->head = head->next;
llist->count--;
data = head->data;
if (llist->dtor) {
llist->dtor(head TSRMLS_CC);
}
head->data = NULL;
SPL_LLIST_DELREF(head);
return data;
}
/* }}} */
static void spl_ptr_llist_copy(spl_ptr_llist *from, spl_ptr_llist *to TSRMLS_DC) /* {{{ */
{
spl_ptr_llist_element *current = from->head, *next;
spl_ptr_llist_ctor_func ctor = from->ctor;
while (current) {
next = current->next;
if (ctor) {
ctor(current TSRMLS_CC);
}
spl_ptr_llist_push(to, current->data TSRMLS_CC);
current = next;
}
}
/* }}} */
/* }}} */
static void spl_dllist_object_free_storage(void *object TSRMLS_DC) /* {{{ */
{
spl_dllist_object *intern = (spl_dllist_object *)object;
zval *tmp = NULL;
zend_object_std_dtor(&intern->std TSRMLS_CC);
while(intern->llist->count > 0) {
tmp = (zval *)spl_ptr_llist_pop(intern->llist TSRMLS_CC);
zval_ptr_dtor(&tmp);
}
spl_ptr_llist_destroy(intern->llist TSRMLS_CC);
SPL_LLIST_CHECK_DELREF(intern->traverse_pointer);
zval_ptr_dtor(&intern->retval);
if (intern->debug_info != NULL) {
zend_hash_destroy(intern->debug_info);
efree(intern->debug_info);
}
efree(object);
}
/* }}} */
zend_object_iterator *spl_dllist_get_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC);
static zend_object_value spl_dllist_object_new_ex(zend_class_entry *class_type, spl_dllist_object **obj, zval *orig, int clone_orig TSRMLS_DC) /* {{{ */
{
zend_object_value retval;
spl_dllist_object *intern;
zend_class_entry *parent = class_type;
int inherited = 0;
intern = ecalloc(1, sizeof(spl_dllist_object));
*obj = intern;
ALLOC_INIT_ZVAL(intern->retval);
zend_object_std_init(&intern->std, class_type TSRMLS_CC);
object_properties_init(&intern->std, class_type);
intern->flags = 0;
intern->traverse_position = 0;
intern->debug_info = NULL;
if (orig) {
spl_dllist_object *other = (spl_dllist_object*)zend_object_store_get_object(orig TSRMLS_CC);
intern->ce_get_iterator = other->ce_get_iterator;
if (clone_orig) {
intern->llist = (spl_ptr_llist *)spl_ptr_llist_init(other->llist->ctor, other->llist->dtor);
spl_ptr_llist_copy(other->llist, intern->llist TSRMLS_CC);
intern->traverse_pointer = intern->llist->head;
SPL_LLIST_CHECK_ADDREF(intern->traverse_pointer);
} else {
intern->llist = other->llist;
intern->traverse_pointer = intern->llist->head;
SPL_LLIST_CHECK_ADDREF(intern->traverse_pointer);
}
intern->flags = other->flags;
} else {
intern->llist = (spl_ptr_llist *)spl_ptr_llist_init(spl_ptr_llist_zval_ctor, spl_ptr_llist_zval_dtor);
intern->traverse_pointer = intern->llist->head;
SPL_LLIST_CHECK_ADDREF(intern->traverse_pointer);
}
while (parent) {
if (parent == spl_ce_SplStack) {
intern->flags |= (SPL_DLLIST_IT_FIX | SPL_DLLIST_IT_LIFO);
retval.handlers = &spl_handler_SplDoublyLinkedList;
} else if (parent == spl_ce_SplQueue) {
intern->flags |= SPL_DLLIST_IT_FIX;
retval.handlers = &spl_handler_SplDoublyLinkedList;
}
if (parent == spl_ce_SplDoublyLinkedList) {
retval.handlers = &spl_handler_SplDoublyLinkedList;
break;
}
parent = parent->parent;
inherited = 1;
}
retval.handle = zend_objects_store_put(intern, (zend_objects_store_dtor_t)zend_objects_destroy_object, spl_dllist_object_free_storage, NULL TSRMLS_CC);
if (!parent) { /* this must never happen */
php_error_docref(NULL TSRMLS_CC, E_COMPILE_ERROR, "Internal compiler error, Class is not child of SplDoublyLinkedList");
}
if (inherited) {
zend_hash_find(&class_type->function_table, "offsetget", sizeof("offsetget"), (void **) &intern->fptr_offset_get);
if (intern->fptr_offset_get->common.scope == parent) {
intern->fptr_offset_get = NULL;
}
zend_hash_find(&class_type->function_table, "offsetset", sizeof("offsetset"), (void **) &intern->fptr_offset_set);
if (intern->fptr_offset_set->common.scope == parent) {
intern->fptr_offset_set = NULL;
}
zend_hash_find(&class_type->function_table, "offsetexists", sizeof("offsetexists"), (void **) &intern->fptr_offset_has);
if (intern->fptr_offset_has->common.scope == parent) {
intern->fptr_offset_has = NULL;
}
zend_hash_find(&class_type->function_table, "offsetunset", sizeof("offsetunset"), (void **) &intern->fptr_offset_del);
if (intern->fptr_offset_del->common.scope == parent) {
intern->fptr_offset_del = NULL;
}
zend_hash_find(&class_type->function_table, "count", sizeof("count"), (void **) &intern->fptr_count);
if (intern->fptr_count->common.scope == parent) {
intern->fptr_count = NULL;
}
}
return retval;
}
/* }}} */
static zend_object_value spl_dllist_object_new(zend_class_entry *class_type TSRMLS_DC) /* {{{ */
{
spl_dllist_object *tmp;
return spl_dllist_object_new_ex(class_type, &tmp, NULL, 0 TSRMLS_CC);
}
/* }}} */
static zend_object_value spl_dllist_object_clone(zval *zobject TSRMLS_DC) /* {{{ */
{
zend_object_value new_obj_val;
zend_object *old_object;
zend_object *new_object;
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
spl_dllist_object *intern;
old_object = zend_objects_get_address(zobject TSRMLS_CC);
new_obj_val = spl_dllist_object_new_ex(old_object->ce, &intern, zobject, 1 TSRMLS_CC);
new_object = &intern->std;
zend_objects_clone_members(new_object, new_obj_val, old_object, handle TSRMLS_CC);
return new_obj_val;
}
/* }}} */
static int spl_dllist_object_count_elements(zval *object, long *count TSRMLS_DC) /* {{{ */
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(object TSRMLS_CC);
if (intern->fptr_count) {
zval *rv;
zend_call_method_with_0_params(&object, intern->std.ce, &intern->fptr_count, "count", &rv);
if (rv) {
zval_ptr_dtor(&intern->retval);
MAKE_STD_ZVAL(intern->retval);
ZVAL_ZVAL(intern->retval, rv, 1, 1);
convert_to_long(intern->retval);
*count = (long) Z_LVAL_P(intern->retval);
return SUCCESS;
}
*count = 0;
return FAILURE;
}
*count = spl_ptr_llist_count(intern->llist);
return SUCCESS;
}
/* }}} */
static HashTable* spl_dllist_object_get_debug_info(zval *obj, int *is_temp TSRMLS_DC) /* {{{{ */
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(obj TSRMLS_CC);
spl_ptr_llist_element *current = intern->llist->head, *next;
zval *tmp, zrv, *dllist_array;
char *pnstr;
int pnlen;
int i = 0;
*is_temp = 0;
if (intern->debug_info == NULL) {
ALLOC_HASHTABLE(intern->debug_info);
zend_hash_init(intern->debug_info, 1, NULL, ZVAL_PTR_DTOR, 0);
}
if (intern->debug_info->nApplyCount == 0) {
INIT_PZVAL(&zrv);
Z_ARRVAL(zrv) = intern->debug_info;
if (!intern->std.properties) {
rebuild_object_properties(&intern->std);
}
zend_hash_copy(intern->debug_info, intern->std.properties, (copy_ctor_func_t) zval_add_ref, (void *) &tmp, sizeof(zval *));
pnstr = spl_gen_private_prop_name(spl_ce_SplDoublyLinkedList, "flags", sizeof("flags")-1, &pnlen TSRMLS_CC);
add_assoc_long_ex(&zrv, pnstr, pnlen+1, intern->flags);
efree(pnstr);
ALLOC_INIT_ZVAL(dllist_array);
array_init(dllist_array);
while (current) {
next = current->next;
add_index_zval(dllist_array, i, (zval *)current->data);
Z_ADDREF_P(current->data);
i++;
current = next;
}
pnstr = spl_gen_private_prop_name(spl_ce_SplDoublyLinkedList, "dllist", sizeof("dllist")-1, &pnlen TSRMLS_CC);
add_assoc_zval_ex(&zrv, pnstr, pnlen+1, dllist_array);
efree(pnstr);
}
return intern->debug_info;
}
/* }}}} */
/* {{{ proto bool SplDoublyLinkedList::push(mixed $value) U
Push $value on the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, push)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_ptr_llist_push(intern->llist, value TSRMLS_CC);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::unshift(mixed $value) U
Unshift $value on the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, unshift)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_ptr_llist_unshift(intern->llist, value TSRMLS_CC);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::pop() U
Pop an element out of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, pop)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_pop(intern->llist TSRMLS_CC);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't pop from an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 1);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::shift() U
Shift an element out of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, shift)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_shift(intern->llist TSRMLS_CC);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't shift from an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 1);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::top() U
Peek at the top element of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, top)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_last(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't peek at an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 0);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::bottom() U
Peek at the bottom element of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, bottom)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_first(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't peek at an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 0);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::count() U
Return the number of elements in the datastructure. */
SPL_METHOD(SplDoublyLinkedList, count)
{
long count;
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
count = spl_ptr_llist_count(intern->llist);
RETURN_LONG(count);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::isEmpty() U
Return true if the SplDoublyLinkedList is empty. */
SPL_METHOD(SplDoublyLinkedList, isEmpty)
{
long count;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
spl_dllist_object_count_elements(getThis(), &count TSRMLS_CC);
RETURN_BOOL(count==0);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::setIteratorMode($flags) U
Set the mode of iteration */
SPL_METHOD(SplDoublyLinkedList, setIteratorMode)
{
long value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &value) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (intern->flags & SPL_DLLIST_IT_FIX
&& (intern->flags & SPL_DLLIST_IT_LIFO) != (value & SPL_DLLIST_IT_LIFO)) {
zend_throw_exception(spl_ce_RuntimeException, "Iterators' LIFO/FIFO modes for SplStack/SplQueue objects are frozen", 0 TSRMLS_CC);
return;
}
intern->flags = value & SPL_DLLIST_IT_MASK;
RETURN_LONG(intern->flags);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::getIteratorMode() U
Return the mode of iteration */
SPL_METHOD(SplDoublyLinkedList, getIteratorMode)
{
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
RETURN_LONG(intern->flags);
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::offsetExists(mixed $index) U
Returns whether the requested $index exists. */
SPL_METHOD(SplDoublyLinkedList, offsetExists)
{
zval *zindex;
spl_dllist_object *intern;
long index;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = spl_offset_convert_to_long(zindex TSRMLS_CC);
RETURN_BOOL(index >= 0 && index < intern->llist->count);
} /* }}} */
/* {{{ proto mixed SplDoublyLinkedList::offsetGet(mixed $index) U
Returns the value at the specified $index. */
SPL_METHOD(SplDoublyLinkedList, offsetGet)
{
zval *zindex, *value;
long index;
spl_dllist_object *intern;
spl_ptr_llist_element *element;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = spl_offset_convert_to_long(zindex TSRMLS_CC);
if (index < 0 || index >= intern->llist->count) {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid or out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
value = (zval *)element->data;
RETURN_ZVAL(value, 1, 0);
} else {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
} /* }}} */
/* {{{ proto void SplDoublyLinkedList::offsetSet(mixed $index, mixed $newval) U
Sets the value at the specified $index to $newval. */
SPL_METHOD(SplDoublyLinkedList, offsetSet)
{
zval *zindex, *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zz", &zindex, &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (Z_TYPE_P(zindex) == IS_NULL) {
/* $obj[] = ... */
spl_ptr_llist_push(intern->llist, value TSRMLS_CC);
} else {
/* $obj[$foo] = ... */
long index;
spl_ptr_llist_element *element;
index = spl_offset_convert_to_long(zindex TSRMLS_CC);
if (index < 0 || index >= intern->llist->count) {
zval_ptr_dtor(&value);
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid or out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
/* call dtor on the old element as in spl_ptr_llist_pop */
if (intern->llist->dtor) {
intern->llist->dtor(element TSRMLS_CC);
}
/* the element is replaced, delref the old one as in
* SplDoublyLinkedList::pop() */
zval_ptr_dtor((zval **)&element->data);
element->data = value;
/* new element, call ctor as in spl_ptr_llist_push */
if (intern->llist->ctor) {
intern->llist->ctor(element TSRMLS_CC);
}
} else {
zval_ptr_dtor(&value);
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
}
} /* }}} */
/* {{{ proto void SplDoublyLinkedList::offsetUnset(mixed $index) U
Unsets the value at the specified $index. */
SPL_METHOD(SplDoublyLinkedList, offsetUnset)
{
zval *zindex;
long index;
spl_dllist_object *intern;
spl_ptr_llist_element *element;
spl_ptr_llist *llist;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = (int)spl_offset_convert_to_long(zindex TSRMLS_CC);
llist = intern->llist;
if (index < 0 || index >= intern->llist->count) {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
/* connect the neightbors */
if (element->prev) {
element->prev->next = element->next;
}
if (element->next) {
element->next->prev = element->prev;
}
/* take care of head/tail */
if (element == llist->head) {
llist->head = element->next;
}
if (element == llist->tail) {
llist->tail = element->prev;
}
/* finally, delete the element */
llist->count--;
if(llist->dtor) {
llist->dtor(element TSRMLS_CC);
}
zval_ptr_dtor((zval **)&element->data);
element->data = NULL;
SPL_LLIST_DELREF(element);
} else {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
} /* }}} */
static void spl_dllist_it_dtor(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
SPL_LLIST_CHECK_DELREF(iterator->traverse_pointer);
zend_user_it_invalidate_current(iter TSRMLS_CC);
zval_ptr_dtor((zval**)&iterator->intern.it.data);
efree(iterator);
}
/* }}} */
static void spl_dllist_it_helper_rewind(spl_ptr_llist_element **traverse_pointer_ptr, int *traverse_position_ptr, spl_ptr_llist *llist, int flags TSRMLS_DC) /* {{{ */
{
SPL_LLIST_CHECK_DELREF(*traverse_pointer_ptr);
if (flags & SPL_DLLIST_IT_LIFO) {
*traverse_position_ptr = llist->count-1;
*traverse_pointer_ptr = llist->tail;
} else {
*traverse_position_ptr = 0;
*traverse_pointer_ptr = llist->head;
}
SPL_LLIST_CHECK_ADDREF(*traverse_pointer_ptr);
}
/* }}} */
static void spl_dllist_it_helper_move_forward(spl_ptr_llist_element **traverse_pointer_ptr, int *traverse_position_ptr, spl_ptr_llist *llist, int flags TSRMLS_DC) /* {{{ */
{
if (*traverse_pointer_ptr) {
spl_ptr_llist_element *old = *traverse_pointer_ptr;
if (flags & SPL_DLLIST_IT_LIFO) {
*traverse_pointer_ptr = old->prev;
(*traverse_position_ptr)--;
if (flags & SPL_DLLIST_IT_DELETE) {
zval *prev = (zval *)spl_ptr_llist_pop(llist TSRMLS_CC);
if (prev) {
zval_ptr_dtor((zval **)&prev);
}
}
} else {
*traverse_pointer_ptr = old->next;
if (flags & SPL_DLLIST_IT_DELETE) {
zval *prev = (zval *)spl_ptr_llist_shift(llist TSRMLS_CC);
if (prev) {
zval_ptr_dtor((zval **)&prev);
}
} else {
(*traverse_position_ptr)++;
}
}
SPL_LLIST_DELREF(old);
SPL_LLIST_CHECK_ADDREF(*traverse_pointer_ptr);
}
}
/* }}} */
static void spl_dllist_it_rewind(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
spl_dllist_object *object = iterator->object;
spl_ptr_llist *llist = object->llist;
spl_dllist_it_helper_rewind(&iterator->traverse_pointer, &iterator->traverse_position, llist, object->flags TSRMLS_CC);