/
deques.clay
751 lines (650 loc) · 21.5 KB
/
deques.clay
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
import data.sequences.handle.*;
import data.sequences.*;
/// @section Deque coordinates
record DequeCoordinate[T] (
current: Pointer[T],
first: Pointer[T],
last: Pointer[T],
node: Pointer[Pointer[T]],
);
[T] overload DequeCoordinate[T]() = DequeCoordinate[T](
Pointer[T](0),
Pointer[T](0),
Pointer[T](0),
Pointer[Pointer[T]](0)
);
[T] private nodeBegin(node: Pointer[Pointer[T]]) : Pointer[T] = node^;
[T] private nodeEnd(node: Pointer[Pointer[T]]) : Pointer[T] = node^ + DequeBufferSize(T);
[T] private setNode(i: DequeCoordinate[T], node: Pointer[Pointer[T]]) {
i.node = node;
i.first = nodeBegin(node);
i.last = nodeEnd(node);
}
[T] overload DequeCoordinate[T](current: Pointer[T], node: Pointer[Pointer[T]])
= DequeCoordinate[T](current, nodeBegin(node), nodeEnd(node), node);
[T] overload inc(ref i: DequeCoordinate[T]) {
inc(i.current);
if(i.current == i.last) {
setNode(i, i.node + 1);
i.current = i.first;
}
}
[T] overload dec(ref i: DequeCoordinate[T]) {
if (i.current == i.first) {
setNode(i, i.node - 1);
i.current = i.last;
}
dec(i.current);
}
[T, I when Integer?(I)] overload updateAssign(#add, ref i: DequeCoordinate[T], n: I) {
i +: PtrInt(n);
}
[T] overload updateAssign(#add, ref i: DequeCoordinate[T], n: PtrInt) {
var offset = n + PtrInt(i.current - i.first);
if (offset >= 0 and offset < DequeBufferSSize(T))
i.current +: n;
else {
var nodeOffset =
if (offset > 0)
PtrInt(offset) \ DequeBufferSSize(T)
else
-PtrInt(-offset - 1) \ DequeBufferSSize(T) - 1;
setNode(i, i.node + nodeOffset);
i.current = i.first + (offset - nodeOffset * DequeBufferSSize(T));
}
}
[T, I when Integer?(I)] overload add(i: DequeCoordinate[T], n: I) --> j: DequeCoordinate[T] {
j <-- i;
j +: n;
}
[T, I when Integer?(I)] overload updateAssign(#subtract, ref i: DequeCoordinate[T], n: I) {
i +: (-PtrInt(n));
}
[T, I when Integer?(I)] overload subtract(i: DequeCoordinate[T], n: I) --> j: DequeCoordinate[T] {
j <-- i;
j +: (-PtrInt(n));
}
[T] overload subtract(i: DequeCoordinate[T], j: DequeCoordinate[T]) : PtrInt {
var mapDistance = PtrInt(i.node - j.node - 1);
var iNodeDistance = PtrInt(i.current - i.first);
var jNodeDistance = PtrInt(j.last - j.current);
return DequeBufferSSize(T) * mapDistance + iNodeDistance + jNodeDistance;
}
[T] overload dereference(i: DequeCoordinate[T]) = ref i.current^;
[T, I when Integer?(I)] overload index(i: DequeCoordinate[T], n: I) = ref (i + n)^;
[T] overload lesser?(x: DequeCoordinate[T], y: DequeCoordinate[T])
= x.node < y.node
or (x.node == y.node and x.current < y.current);
[T] forceinline overload hasValue?(i: DequeCoordinate[T]) = not null?(i.current);
[T] forceinline overload getValue(i: DequeCoordinate[T]) = ref i.current^;
/// @section Deque object interface
record Deque[T] (
map: Pointer[Pointer[T]],
mapSize: SizeT,
begin: DequeCoordinate[T],
end: DequeCoordinate[T],
);
[T] private validDequeCoordinate?(d: Deque[T], coord: DequeCoordinate[T]) : Bool
= coord.node >= d.map and coord.node < d.map + d.mapSize
and coord >= d.begin and coord <= d.end;
[T] overload RegularRecord?(#Deque[T]) = false;
[T] overload SequenceContainer?(#Deque[T]) = true;
[T] overload UnderlyingContainerConstructor(#Deque[T]) = Deque;
[T] overload Deque[T]() --> deque: Deque[T] {
initializeDequeMap(deque, SizeT(0));
}
[T, A when Sequence?(A) and T == SequenceElementType(A)]
overload Deque[T](forward from: A) --> to: Deque[T] {
initializeDequeMap(to, SizeT(0));
try {
for (x in from) {
push(to, x);
}
} catch (ex) {
destroy(to);
throw ex;
}
}
[T, A when SizedSequence?(A) and T == SequenceElementType(A)]
overload Deque[T](forward from: A) --> to: Deque[T] {
initializeDequeMap(to, size(from));
var i = to.begin;
try {
for (x in from) {
i^ <-- x;
inc(i);
}
} catch (ex) {
destroyDequeValues(to.begin, i);
destroyDequeMap(to);
throw ex;
}
}
[T, ..A when countValues(..A) > 0 and equalValues?(T, ..A)]
overload Deque[T](forward ..from: A) --> to: Deque[T] {
initializeDequeMap(to, SizeT(countValues(..A)));
var i = to.begin;
try {
..for (x in from) {
i^ <-- x;
inc(i);
}
} catch (ex) {
destroyDequeValues(to.begin, i);
destroyDequeMap(to);
throw ex;
}
}
[A when Sequence?(A)]
overload Deque(forward from:A) {
alias T = SequenceElementType(A);
return Deque[T](from);
}
[A when MultiValuedSequence?(A)]
overload Deque(forward from:A) = Deque(mapped(Tuple, from));
[T] overload assign(ref to: Deque[T], from: Deque[T]) {
resize(to, size(from));
var toI = to.begin;
var fromI = from.begin;
while (toI != to.end) {
toI^ = fromI^;
inc(toI);
inc(fromI);
}
}
[T] overload destroy(deque: Deque[T]) {
if (not null?(deque.map)) {
destroyDequeValues(deque.begin, deque.end);
destroyDequeMap(deque);
}
}
[T] overload BitwiseMovedType?(#Deque[T]) = true;
[T] overload resetUnsafe(d: Deque[T]) {
d.map <-- Pointer[Pointer[T]](0);
d.mapSize <-- SizeT(0);
d.begin <-- DequeCoordinate[T]();
d.end <-- DequeCoordinate[T]();
}
[T] overload begin(d: Deque[T]) = d.begin;
[T] overload end(d: Deque[T]) = d.end;
[T] overload iterator(d: Deque[T]) = coordinateRange(d.begin, d.end);
[T] overload reverseIterator(d: Deque[T]) = reverseCoordinateRange(d.end, d.begin);
[T] overload size(d: Deque[T]) = SizeT(d.end - d.begin);
[T, I when Integer?(I)] overload index(d: Deque[T], i: I) {
assert["boundsChecks"](i >= 0 and i < size(d), Deque[T], " index out of bounds");
return ref (d.begin + i)^;
}
[T] overload front(d: Deque[T]) {
assert["boundsChecks"](not empty?(d), "front of empty ", Deque[T]);
return ref d.begin^;
}
[T] overload back(d: Deque[T]) {
assert["boundsChecks"](not empty?(d), "back of empty ", Deque[T]);
var backi = d.end;
dec(backi);
return ref backi^;
}
[T] overload pushFront(deque: Deque[T], forward value) {
if (deque.begin.current != deque.begin.first) {
var newCurrent = deque.begin.current - 1;
newCurrent^ <-- value;
deque.begin.current = newCurrent;
} else
pushFrontDeque1(deque, value);
}
define pushFrontAll(s, vs);
[T, S when Sequence?(S) and SequenceElementType(S) == T]
overload pushFrontAll(deque: Deque[T], forward seq: S) {
for (x in reversed(seq))
pushFront(deque, x);
}
[T, S when SizedSequence?(S) and SequenceElementType(S) == T]
overload pushFrontAll(deque: Deque[T], forward seq: S) {
var seqSize = size(seq);
deque.begin = reserveDequeFrontElements(deque, seqSize);
var i = deque.begin + seqSize;
try {
for (x in reversed(seq)) {
dec(i);
i^ <-- x;
}
} catch(ex) {
inc(i);
destroyDequeFrontNodes(deque, i);
throw ex;
}
}
[T] overload push(deque: Deque[T], forward value: T) {
if (deque.end.current != deque.end.last - 1) {
deque.end.current^ <-- value;
deque.end.current +: 1;
} else
pushDeque1(deque, value);
}
[T, S when SizedSequence?(S) and SequenceElementType(S) == T]
overload pushAll(deque: Deque[T], forward seq: S) {
var seqSize = size(seq);
deque.end = reserveDequeBackElements(deque, seqSize);
var i = deque.end - seqSize;
try {
for (x in seq) {
i^ <-- x;
inc(i);
}
} catch(ex) {
destroyDequeBackNodes(deque, i);
throw ex;
}
}
[T] overload popFront(deque: Deque[T]) --> value: T {
assert["boundsChecks"](not empty?(deque), "popFront of empty ", Deque[T]);
if (deque.begin.current != deque.begin.last - 1) {
value <-- moveUnsafe(deque.begin.current^);
deque.begin.current +: 1;
} else
value <-- popFrontDeque1(deque);
}
[T] overload pop(deque: Deque[T]) {
assert["boundsChecks"](not empty?(deque), "pop of empty ", Deque[T]);
if (deque.end.current != deque.end.first) {
deque.end.current -: 1;
return moveUnsafe(deque.end.current^);
} else
return popDeque1(deque);
}
[T] overload clear(deque: Deque[T]) {
destroyDequeValues(deque.begin, deque.end);
destroyDequeBackNodes(deque, deque.begin);
}
[T, I when Integer?(I)]
overload insert(deque: Deque[T], n: I, forward value: T) {
insert(deque, deque.begin + n, value);
}
[T] overload insert(deque: Deque[T], i: DequeCoordinate[T], forward value: T) {
assert["boundsChecks"](validDequeCoordinate?(deque, i),
"invalid insert coordinate into ", Deque[T]);
if (i.current == deque.begin.current)
pushFront(deque, value);
else if (i.current == deque.end.current)
push(deque, value);
else
insertDequeValue(deque, i, value);
}
[T, S, I when Sequence?(S) and SequenceElementType(S) == T and Integer?(I)]
overload insert(deque: Deque[T], n: I, forward seq: S) {
insert(deque, deque.begin + n, seq);
}
[T, S when Sequence?(S) and SequenceElementType(S) == T]
overload insertAll(deque: Deque[T], i: DequeCoordinate[T], forward seq: S) {
assert["boundsChecks"](validDequeCoordinate?(deque, i),
"invalid insert coordinate into ", Deque[T]);
if (i.current == deque.begin.current)
pushFrontAll(deque, seq);
else if (i.current == deque.end.current)
pushAll(deque, seq);
else
insertDequeSequence(deque, i, seq);
}
[T, I, J when Integer?(I) and Integer?(J)]
overload remove(deque: Deque[T], fromN: I, toN: J) {
remove(deque, deque.begin+fromN, deque.begin+toN);
}
[T]
overload remove(deque: Deque[T], from: DequeCoordinate[T], to: DequeCoordinate[T]) {
assert["boundsChecks"](validDequeCoordinate?(deque, from),
"invalid remove start coordinate into ", Deque[T]);
assert["boundsChecks"](validDequeCoordinate?(deque, to),
"invalid remove end coordinate into ", Deque[T]);
if (from == deque.begin and to == deque.end)
clear(deque);
else {
destroyDequeValues(from, to);
var count = SizeT(to - from);
var elemsBefore = SizeT(from - deque.begin);
if (elemsBefore <= (size(deque) - count) \ SizeT(2)) {
var newBegin = deque.begin + count;
if (from != deque.begin)
moveDequeValuesBackwards(newBegin, to, deque.begin);
destroyDequeFrontNodes(deque, newBegin);
} else {
var newEnd = deque.end - count;
if (to != deque.end)
moveDequeValues(from, newEnd, to);
destroyDequeBackNodes(deque, newEnd);
}
}
}
[T, I when Integer?(I)]
overload remove(deque: Deque[T], n: I) {
remove(deque, deque.begin+n);
}
[T]
overload remove(deque: Deque[T], i: DequeCoordinate[T]) {
assert["boundsChecks"](validDequeCoordinate?(deque, i),
"invalid remove coordinate into ", Deque[T]);
destroy(i^);
var next = i;
inc(next);
var index = SizeT(i - deque.begin);
if (index < size(deque) \ SizeT(2)) {
var newBegin = deque.begin;
inc(newBegin);
if (i != deque.begin)
moveDequeValuesBackwards(newBegin, next, deque.begin);
if (newBegin.node != deque.begin.node)
freeRawMemory(deque.begin.node^);
deque.begin = newBegin;
} else {
var newEnd = deque.end;
dec(newEnd);
if (next != deque.end)
moveDequeValues(i, newEnd, next);
if (newEnd.node != deque.end.node)
freeRawMemory(deque.end.node^);
deque.end = newEnd;
}
}
[T, I when Integer?(I)] overload resize(deque: Deque[T], newSize: I) {
resize(deque, SizeT(newSize));
}
[T] overload resize(deque: Deque[T], newSize: SizeT) {
var oldSize = size(deque);
if (newSize < oldSize) {
var newEnd = deque.begin + newSize;
destroyDequeValues(newEnd, deque.end);
destroyDequeBackNodes(deque, newEnd);
} else {
// XXX more efficient implementation
for (i in range(newSize - oldSize))
push(deque, T());
}
}
// XXX deque comparison
/// @section Deque implementation details
private alias DEQUE_TARGET_BUFFER_SIZE = SizeT(512);
private alias DEQUE_INITIAL_MAP_SIZE = SizeT(8);
define DequeBufferSize;
overload DequeBufferSize(T) {
if (TypeSize(T) < DEQUE_TARGET_BUFFER_SIZE)
return DEQUE_TARGET_BUFFER_SIZE \ TypeSize(T);
else
return SizeT(1);
}
DequeBufferSSize(T) = PtrInt(DequeBufferSize(T));
private allocateNode(T) = allocateRawMemory(T, DequeBufferSize(T));
[T] private initializeDequeMap(deque: Deque[T], size: SizeT) {
var numNodes = size \ DequeBufferSize(T) + SizeT(1);
deque.mapSize = max(numNodes + 2, DEQUE_INITIAL_MAP_SIZE);
deque.map = allocateRawMemory(Pointer[T], deque.mapSize);
var nodeBegin = deque.map + (deque.mapSize - numNodes) \ 2;
var nodeEnd = nodeBegin + numNodes;
try { createDequeNodes(nodeBegin, nodeEnd); }
catch(ex) {
freeRawMemory(deque.map);
deque.map = null(Pointer[T]);
deque.mapSize = SizeT(0);
throw ex;
}
setNode(deque.begin, nodeBegin);
deque.begin.current = deque.begin.first;
setNode(deque.end, nodeEnd - 1);
deque.end.current = deque.end.first + size % DequeBufferSize(T);
}
[T] private destroyDequeMap(deque: Deque[T]) {
destroyDequeNodes(deque.begin.node, deque.end.node + 1);
freeRawMemory(deque.map);
}
[T] private destroyDequeValues(begin: DequeCoordinate[T], end: DequeCoordinate[T]) {
var i = begin;
while (i != end) {
destroy(i^);
inc(i);
}
}
[T] private moveDequeValues(
toBegin: DequeCoordinate[T],
toEnd: DequeCoordinate[T],
fromBegin: DequeCoordinate[T]
) {
var toI = toBegin;
var fromI = fromBegin;
while (toI != toEnd) {
toI^ <-- moveUnsafe(fromI^);
inc(toI);
inc(fromI);
}
}
[T] private moveDequeValuesBackwards(
toBegin: DequeCoordinate[T],
toEnd: DequeCoordinate[T],
fromBegin: DequeCoordinate[T]
) {
var toI = toEnd;
var fromI = fromBegin + (toEnd - toBegin);
while (toI != toBegin) {
dec(toI);
dec(fromI);
toI^ <-- moveUnsafe(fromI^);
}
}
[T] private reserveMapFrontNodes(deque: Deque[T], count: SizeT) {
if (count > deque.begin.node - deque.map)
reallocateDequeMap(deque, count, true);
}
[T] private reserveMapBackNodes(deque: Deque[T], count: SizeT) {
if (count + SizeT(1) > deque.mapSize - (deque.end.node - deque.map))
reallocateDequeMap(deque, count, false);
}
[T] private reallocateDequeMap(deque: Deque[T], addCount: SizeT, addAtFront?: Bool) {
var oldNodeCount = SizeT(deque.end.node - deque.begin.node) + SizeT(1);
var newNodeCount = oldNodeCount + addCount;
var newBeginNode = Pointer[Pointer[T]]();
var frontOffset = SizeT();
if (addAtFront?)
frontOffset = addCount;
else
frontOffset = SizeT(0);
if (deque.mapSize > SizeT(2)*newNodeCount) {
newBeginNode = deque.map + (deque.mapSize - newNodeCount) \ SizeT(2) + frontOffset;
moveMemoryUnsafe(
newBeginNode,
deque.begin.node,
deque.begin.node + oldNodeCount,
);
} else {
var newMapSize = deque.mapSize + max(deque.mapSize, addCount) + SizeT(2);
var newMap = allocateRawMemory(Pointer[T], newMapSize);
newBeginNode = newMap + (newMapSize - newNodeCount) \ SizeT(2) + frontOffset;
moveMemoryUnsafe(
newBeginNode,
deque.begin.node,
deque.begin.node + oldNodeCount,
);
freeRawMemory(deque.map);
deque.map <-- newMap;
deque.mapSize <-- newMapSize;
}
deque.begin.node = newBeginNode;
deque.end.node = newBeginNode + oldNodeCount - SizeT(1);
}
[T] private createDequeNodes(begin: Pointer[Pointer[T]], end: Pointer[Pointer[T]]) {
var i = begin;
try {
while (i < end) {
i^ = allocateNode(T);
inc(i);
}
} catch(ex) {
destroyDequeNodes(begin, i);
throw ex;
}
}
[T] private destroyDequeNodes(begin: Pointer[Pointer[T]], end: Pointer[Pointer[T]]) {
var i = begin;
while (i < end) {
freeRawMemory(i^);
inc(i);
}
}
[T] private destroyDequeFrontNodes(deque: Deque[T], newBegin: DequeCoordinate[T]) {
destroyDequeNodes(deque.begin.node, newBegin.node);
deque.begin = newBegin;
}
[T] private destroyDequeBackNodes(deque: Deque[T], newEnd: DequeCoordinate[T]) {
destroyDequeNodes(newEnd.node + 1, deque.end.node + 1);
deque.end = newEnd;
}
[T] private reserveDequeFrontElements(deque: Deque[T], count: SizeT) {
var vacancies = deque.begin.current - deque.begin.first;
if (count > vacancies)
newDequeFrontElements(deque, count - vacancies);
return deque.begin - count;
}
[T] private reserveDequeBackElements(deque: Deque[T], count: SizeT) {
var vacancies = (deque.end.last - deque.end.current) - SizeT(1);
if (count > vacancies)
newDequeBackElements(deque, count - vacancies);
return deque.end + count;
}
private printMap(deque) {
for (x in CoordinateRange(deque.map, deque.map + deque.mapSize)) {
print(@x, " => ", x);
if (@x == deque.begin.node)
println(" <- begin");
else if (@x == deque.end.node)
println(" <- end");
else
println();
}
}
[T] private newDequeFrontElements(deque: Deque[T], count: SizeT) {
var newNodes = SizeT(count + DequeBufferSize(T) - 1) \ DequeBufferSize(T);
reserveMapFrontNodes(deque, newNodes);
createDequeNodes(deque.begin.node - newNodes, deque.begin.node);
}
[T] private newDequeBackElements(deque: Deque[T], count: SizeT) {
var newNodes = SizeT(count + DequeBufferSize(T) - 1) \ DequeBufferSize(T);
reserveMapBackNodes(deque, newNodes);
createDequeNodes(deque.end.node + 1, deque.end.node + newNodes + 1);
}
[T] private insertDequeValue(deque: Deque[T], i: DequeCoordinate[T], forward value) {
var index = SizeT(i - deque.begin);
if (index < size(deque) \ SizeT(2)) {
deque.begin = reserveDequeFrontElements(deque, SizeT(1));
var oldBegin = deque.begin;
inc(oldBegin);
i = oldBegin + index;
var prev = i;
dec(prev);
moveDequeValues(deque.begin, prev, oldBegin);
try {
prev^ <-- value;
} catch (ex) {
resetUnsafe(prev^);
throw ex;
}
} else {
deque.end = reserveDequeBackElements(deque, SizeT(1));
var oldEnd = deque.end;
dec(oldEnd);
i = deque.begin + index;
var next = i;
inc(next);
moveDequeValuesBackwards(next, deque.end, i);
try {
i^ <-- value;
} catch (ex) {
resetUnsafe(i^);
throw ex;
}
}
}
private define insertDequeSequence;
[T, S when Sequence?(S)]
overload insertDequeSequence(deque: Deque[T], i: DequeCoordinate[T], forward seq: S) {
for (x in reversed(seq))
insertDequeValue(deque, i, seq);
}
[T, S when SizedSequence?(S)]
overload insertDequeSequence(deque: Deque[T], i: DequeCoordinate[T], forward seq: S) {
var index = SizeT(i - deque.begin);
var seqSize = size(seq);
if (index < size(deque) \ SizeT(2)) {
deque.begin = reserveDequeFrontElements(deque, seqSize);
var oldBegin = deque.begin + seqSize;
i = oldBegin + index;
var prev = i - seqSize;
moveDequeValues(deque.begin, prev, oldBegin);
var ii = prev;
try {
for (x in seq) {
ii^ <-- x;
inc(ii);
}
} catch (ex) {
while (ii != i) {
resetUnsafe(ii^);
inc(ii);
}
throw ex;
}
} else {
deque.end = reserveDequeBackElements(deque, seqSize);
var oldEnd = deque.end - seqSize;
i = deque.begin + index;
var next = i + seqSize;
moveDequeValuesBackwards(next, deque.end, i);
var ii = i;
try {
for (x in seq) {
ii^ <-- x;
inc(ii);
}
} catch (ex) {
while (ii != next) {
resetUnsafe(ii^);
inc(ii);
}
throw ex;
}
}
}
[T] private pushFrontDeque1(deque: Deque[T], forward value) {
reserveMapFrontNodes(deque, SizeT(1));
var newBeginNode = deque.begin.node - 1;
newBeginNode^ = allocateNode(T);
setNode(deque.begin, newBeginNode);
deque.begin.current = deque.begin.last - 1;
try {
deque.begin.current^ <-- value;
} catch(ex) {
inc(deque.begin);
freeRawMemory(newBeginNode^);
throw ex;
}
}
[T] private pushDeque1(deque: Deque[T], forward value) {
reserveMapBackNodes(deque, SizeT(1));
var newEndNode = deque.end.node + 1;
newEndNode^ = allocateNode(T);
try {
deque.end.current^ <-- value;
} catch(ex) {
freeRawMemory(newEndNode^);
throw ex;
}
setNode(deque.end, newEndNode);
deque.end.current = deque.end.first;
}
[T] private popFrontDeque1(deque: Deque[T]) --> value: T {
value <-- moveUnsafe(deque.begin.current^);
freeRawMemory(deque.begin.first);
setNode(deque.begin, deque.begin.node + 1);
deque.begin.current = deque.begin.first;
}
[T] private popDeque1(deque: Deque[T]) {
freeRawMemory(deque.end.first);
setNode(deque.end, deque.end.node - 1);
deque.end.current = deque.end.last - 1;
return moveUnsafe(deque.end.current^);
}