1 /*
2 * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.internal.objects;
27
28 import static jdk.nashorn.internal.runtime.ECMAErrors.rangeError;
29 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
30 import static jdk.nashorn.internal.runtime.PropertyDescriptor.VALUE;
31 import static jdk.nashorn.internal.runtime.PropertyDescriptor.WRITABLE;
32 import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.isValidArrayIndex;
33 import static jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator.arrayLikeIterator;
34 import static jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator.reverseArrayLikeIterator;
35 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALLSITE_STRICT;
36
37 import java.lang.invoke.MethodHandle;
38 import java.util.ArrayList;
39 import java.util.Arrays;
40 import java.util.Collections;
41 import java.util.Comparator;
42 import java.util.Iterator;
43 import java.util.List;
44 import java.util.concurrent.Callable;
45 import jdk.internal.dynalink.CallSiteDescriptor;
46 import jdk.internal.dynalink.linker.GuardedInvocation;
47 import jdk.internal.dynalink.linker.LinkRequest;
48 import jdk.nashorn.api.scripting.JSObject;
49 import jdk.nashorn.internal.objects.annotations.Attribute;
50 import jdk.nashorn.internal.objects.annotations.Constructor;
51 import jdk.nashorn.internal.objects.annotations.Function;
52 import jdk.nashorn.internal.objects.annotations.Getter;
53 import jdk.nashorn.internal.objects.annotations.ScriptClass;
54 import jdk.nashorn.internal.objects.annotations.Setter;
55 import jdk.nashorn.internal.objects.annotations.SpecializedFunction;
56 import jdk.nashorn.internal.objects.annotations.SpecializedFunction.LinkLogic;
57 import jdk.nashorn.internal.objects.annotations.Where;
58 import jdk.nashorn.internal.runtime.Context;
59 import jdk.nashorn.internal.runtime.Debug;
60 import jdk.nashorn.internal.runtime.JSType;
61 import jdk.nashorn.internal.runtime.OptimisticBuiltins;
62 import jdk.nashorn.internal.runtime.PropertyDescriptor;
63 import jdk.nashorn.internal.runtime.PropertyMap;
64 import jdk.nashorn.internal.runtime.ScriptFunction;
65 import jdk.nashorn.internal.runtime.ScriptObject;
66 import jdk.nashorn.internal.runtime.ScriptRuntime;
67 import jdk.nashorn.internal.runtime.Undefined;
68 import jdk.nashorn.internal.runtime.arrays.ArrayData;
69 import jdk.nashorn.internal.runtime.arrays.ArrayIndex;
70 import jdk.nashorn.internal.runtime.arrays.ArrayLikeIterator;
71 import jdk.nashorn.internal.runtime.arrays.ContinuousArrayData;
72 import jdk.nashorn.internal.runtime.arrays.IntElements;
73 import jdk.nashorn.internal.runtime.arrays.IntOrLongElements;
74 import jdk.nashorn.internal.runtime.arrays.IteratorAction;
75 import jdk.nashorn.internal.runtime.arrays.NumericElements;
76 import jdk.nashorn.internal.runtime.linker.Bootstrap;
77 import jdk.nashorn.internal.runtime.linker.InvokeByName;
78
79 /**
80 * Runtime representation of a JavaScript array. NativeArray only holds numeric
81 * keyed values. All other values are stored in spill.
82 */
83 @ScriptClass("Array")
84 public final class NativeArray extends ScriptObject implements OptimisticBuiltins {
85 private static final Object JOIN = new Object();
86 private static final Object EVERY_CALLBACK_INVOKER = new Object();
87 private static final Object SOME_CALLBACK_INVOKER = new Object();
88 private static final Object FOREACH_CALLBACK_INVOKER = new Object();
89 private static final Object MAP_CALLBACK_INVOKER = new Object();
90 private static final Object FILTER_CALLBACK_INVOKER = new Object();
91 private static final Object REDUCE_CALLBACK_INVOKER = new Object();
92 private static final Object CALL_CMP = new Object();
93 private static final Object TO_LOCALE_STRING = new Object();
94
95 /*
96 * Constructors.
97 */
98 NativeArray() {
99 this(ArrayData.initialArray());
100 }
101
102 NativeArray(final long length) {
103 // TODO assert valid index in long before casting
104 this(ArrayData.allocate((int)length));
105 }
106
107 NativeArray(final int[] array) {
108 this(ArrayData.allocate(array));
109 }
110
111 NativeArray(final long[] array) {
112 this(ArrayData.allocate(array));
113 }
114
115 NativeArray(final double[] array) {
116 this(ArrayData.allocate(array));
117 }
118
119 NativeArray(final Object[] array) {
120 this(ArrayData.allocate(array.length));
121
122 ArrayData arrayData = this.getArray();
123
124 for (int index = 0; index < array.length; index++) {
125 final Object value = array[index];
126
127 if (value == ScriptRuntime.EMPTY) {
128 arrayData = arrayData.delete(index);
129 } else {
130 arrayData = arrayData.set(index, value, false);
131 }
132 }
133
134 this.setArray(arrayData);
135 }
136
137 NativeArray(final ArrayData arrayData) {
138 this(arrayData, Global.instance());
139 }
140
141 NativeArray(final ArrayData arrayData, final Global global) {
142 super(global.getArrayPrototype(), $nasgenmap$);
143 setArray(arrayData);
144 setIsArray();
145 }
146
147 @Override
148 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
149 final GuardedInvocation inv = getArray().findFastGetMethod(getArray().getClass(), desc, request, operator);
150 if (inv != null) {
151 return inv;
152 }
153 return super.findGetMethod(desc, request, operator);
154 }
155
156 @Override
157 protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
158 final GuardedInvocation inv = getArray().findFastGetIndexMethod(getArray().getClass(), desc, request);
159 if (inv != null) {
160 return inv;
161 }
162 return super.findGetIndexMethod(desc, request);
163 }
164
165 @Override
166 protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
167 final GuardedInvocation inv = getArray().findFastSetIndexMethod(getArray().getClass(), desc, request);
168 if (inv != null) {
169 return inv;
170 }
171
172 return super.findSetIndexMethod(desc, request);
173 }
174
175 private static InvokeByName getJOIN() {
176 return Global.instance().getInvokeByName(JOIN,
177 new Callable<InvokeByName>() {
178 @Override
179 public InvokeByName call() {
180 return new InvokeByName("join", ScriptObject.class);
181 }
182 });
183 }
184
185 private static MethodHandle createIteratorCallbackInvoker(final Object key, final Class<?> rtype) {
186 return Global.instance().getDynamicInvoker(key,
187 new Callable<MethodHandle>() {
188 @Override
189 public MethodHandle call() {
190 return Bootstrap.createDynamicInvoker("dyn:call", rtype, Object.class, Object.class, Object.class,
191 long.class, Object.class);
192 }
193 });
194 }
195
196 private static MethodHandle getEVERY_CALLBACK_INVOKER() {
197 return createIteratorCallbackInvoker(EVERY_CALLBACK_INVOKER, boolean.class);
198 }
199
200 private static MethodHandle getSOME_CALLBACK_INVOKER() {
201 return createIteratorCallbackInvoker(SOME_CALLBACK_INVOKER, boolean.class);
202 }
203
204 private static MethodHandle getFOREACH_CALLBACK_INVOKER() {
205 return createIteratorCallbackInvoker(FOREACH_CALLBACK_INVOKER, void.class);
206 }
207
208 private static MethodHandle getMAP_CALLBACK_INVOKER() {
209 return createIteratorCallbackInvoker(MAP_CALLBACK_INVOKER, Object.class);
210 }
211
212 private static MethodHandle getFILTER_CALLBACK_INVOKER() {
213 return createIteratorCallbackInvoker(FILTER_CALLBACK_INVOKER, boolean.class);
214 }
215
216 private static MethodHandle getREDUCE_CALLBACK_INVOKER() {
217 return Global.instance().getDynamicInvoker(REDUCE_CALLBACK_INVOKER,
218 new Callable<MethodHandle>() {
219 @Override
220 public MethodHandle call() {
221 return Bootstrap.createDynamicInvoker("dyn:call", Object.class, Object.class,
222 Undefined.class, Object.class, Object.class, long.class, Object.class);
223 }
224 });
225 }
226
227 private static MethodHandle getCALL_CMP() {
228 return Global.instance().getDynamicInvoker(CALL_CMP,
229 new Callable<MethodHandle>() {
230 @Override
231 public MethodHandle call() {
232 return Bootstrap.createDynamicInvoker("dyn:call", double.class,
233 ScriptFunction.class, Object.class, Object.class, Object.class);
234 }
235 });
236 }
237
238 private static InvokeByName getTO_LOCALE_STRING() {
239 return Global.instance().getInvokeByName(TO_LOCALE_STRING,
240 new Callable<InvokeByName>() {
241 @Override
242 public InvokeByName call() {
243 return new InvokeByName("toLocaleString", ScriptObject.class, String.class);
244 }
245 });
246 }
247
248 // initialized by nasgen
249 private static PropertyMap $nasgenmap$;
250
251 @Override
252 public String getClassName() {
253 return "Array";
254 }
255
256 @Override
257 public Object getLength() {
258 final long length = JSType.toUint32(getArray().length());
259 if (length < Integer.MAX_VALUE) {
260 return (int)length;
261 }
262 return length;
263 }
264
265 private boolean defineLength(final long oldLen, final PropertyDescriptor oldLenDesc, final PropertyDescriptor desc, final boolean reject) {
266 // Step 3a
267 if (!desc.has(VALUE)) {
268 return super.defineOwnProperty("length", desc, reject);
269 }
270
271 // Step 3b
272 final PropertyDescriptor newLenDesc = desc;
273
274 // Step 3c and 3d - get new length and convert to long
275 final long newLen = NativeArray.validLength(newLenDesc.getValue());
276
277 // Step 3e
278 newLenDesc.setValue(newLen);
279
280 // Step 3f
281 // increasing array length - just need to set new length value (and attributes if any) and return
282 if (newLen >= oldLen) {
283 return super.defineOwnProperty("length", newLenDesc, reject);
284 }
285
286 // Step 3g
287 if (!oldLenDesc.isWritable()) {
288 if (reject) {
289 throw typeError("property.not.writable", "length", ScriptRuntime.safeToString(this));
290 }
291 return false;
292 }
293
294 // Step 3h and 3i
295 final boolean newWritable = !newLenDesc.has(WRITABLE) || newLenDesc.isWritable();
296 if (!newWritable) {
297 newLenDesc.setWritable(true);
298 }
299
300 // Step 3j and 3k
301 final boolean succeeded = super.defineOwnProperty("length", newLenDesc, reject);
302 if (!succeeded) {
303 return false;
304 }
305
306 // Step 3l
307 // make sure that length is set till the point we can delete the old elements
308 long o = oldLen;
309 while (newLen < o) {
310 o--;
311 final boolean deleteSucceeded = delete(o, false);
312 if (!deleteSucceeded) {
313 newLenDesc.setValue(o + 1);
314 if (!newWritable) {
315 newLenDesc.setWritable(false);
316 }
317 super.defineOwnProperty("length", newLenDesc, false);
318 if (reject) {
319 throw typeError("property.not.writable", "length", ScriptRuntime.safeToString(this));
320 }
321 return false;
322 }
323 }
324
325 // Step 3m
326 if (!newWritable) {
327 // make 'length' property not writable
328 final ScriptObject newDesc = Global.newEmptyInstance();
329 newDesc.set(WRITABLE, false, 0);
330 return super.defineOwnProperty("length", newDesc, false);
331 }
332
333 return true;
334 }
335
336 /**
337 * ECMA 15.4.5.1 [[DefineOwnProperty]] ( P, Desc, Throw )
338 */
339 @Override
340 public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) {
341 final PropertyDescriptor desc = toPropertyDescriptor(Global.instance(), propertyDesc);
342
343 // never be undefined as "length" is always defined and can't be deleted for arrays
344 // Step 1
345 final PropertyDescriptor oldLenDesc = (PropertyDescriptor) super.getOwnPropertyDescriptor("length");
346
347 // Step 2
348 // get old length and convert to long. Always a Long/Uint32 but we take the safe road.
349 final long oldLen = JSType.toUint32(oldLenDesc.getValue());
350
351 // Step 3
352 if ("length".equals(key)) {
353 // check for length being made non-writable
354 final boolean result = defineLength(oldLen, oldLenDesc, desc, reject);
355 if (desc.has(WRITABLE) && !desc.isWritable()) {
356 setIsLengthNotWritable();
357 }
358 return result;
359 }
360
361 // Step 4a
362 final int index = ArrayIndex.getArrayIndex(key);
363 if (ArrayIndex.isValidArrayIndex(index)) {
364 final long longIndex = ArrayIndex.toLongIndex(index);
365 // Step 4b
366 // setting an element beyond current length, but 'length' is not writable
367 if (longIndex >= oldLen && !oldLenDesc.isWritable()) {
368 if (reject) {
369 throw typeError("property.not.writable", Long.toString(longIndex), ScriptRuntime.safeToString(this));
370 }
371 return false;
372 }
373
374 // Step 4c
375 // set the new array element
376 final boolean succeeded = super.defineOwnProperty(key, desc, false);
377
378 // Step 4d
379 if (!succeeded) {
380 if (reject) {
381 throw typeError("cant.redefine.property", key, ScriptRuntime.safeToString(this));
382 }
383 return false;
384 }
385
386 // Step 4e -- adjust new length based on new element index that is set
387 if (longIndex >= oldLen) {
388 oldLenDesc.setValue(longIndex + 1);
389 super.defineOwnProperty("length", oldLenDesc, false);
390 }
391
392 // Step 4f
393 return true;
394 }
395
396 // not an index property
397 return super.defineOwnProperty(key, desc, reject);
398 }
399
400 /**
401 * Spec. mentions use of [[DefineOwnProperty]] for indexed properties in
402 * certain places (eg. Array.prototype.map, filter). We can not use ScriptObject.set
403 * method in such cases. This is because set method uses inherited setters (if any)
404 * from any object in proto chain such as Array.prototype, Object.prototype.
405 * This method directly sets a particular element value in the current object.
406 *
407 * @param index key for property
408 * @param value value to define
409 */
410 @Override
411 public final void defineOwnProperty(final int index, final Object value) {
412 assert isValidArrayIndex(index) : "invalid array index";
413 final long longIndex = ArrayIndex.toLongIndex(index);
414 if (longIndex >= getArray().length()) {
415 // make array big enough to hold..
416 setArray(getArray().ensure(longIndex));
417 }
418 setArray(getArray().set(index, value, false));
419 }
420
421 /**
422 * Return the array contents upcasted as an ObjectArray, regardless of
423 * representation
424 *
425 * @return an object array
426 */
427 public Object[] asObjectArray() {
428 return getArray().asObjectArray();
429 }
430
431 @Override
432 public void setIsLengthNotWritable() {
433 super.setIsLengthNotWritable();
434 setArray(ArrayData.setIsLengthNotWritable(getArray()));
435 }
436
437 /**
438 * ECMA 15.4.3.2 Array.isArray ( arg )
439 *
440 * @param self self reference
441 * @param arg argument - object to check
442 * @return true if argument is an array
443 */
444 @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
445 public static boolean isArray(final Object self, final Object arg) {
446 return isArray(arg) || (arg instanceof JSObject && ((JSObject)arg).isArray());
447 }
448
449 /**
450 * Length getter
451 * @param self self reference
452 * @return the length of the object
453 */
454 @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
455 public static Object length(final Object self) {
456 if (isArray(self)) {
457 return JSType.toUint32(((ScriptObject) self).getArray().length());
458 }
459
460 return 0;
461 }
462
463 /**
464 * Length setter
465 * @param self self reference
466 * @param length new length property
467 */
468 @Setter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
469 public static void length(final Object self, final Object length) {
470 if (isArray(self)) {
471 ((ScriptObject)self).setLength(validLength(length));
472 }
473 }
474
475 /**
476 * Prototype length getter
477 * @param self self reference
478 * @return the length of the object
479 */
480 @Getter(name = "length", where = Where.PROTOTYPE, attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
481 public static Object getProtoLength(final Object self) {
482 return length(self); // Same as instance getter but we can't make nasgen use the same method for prototype
483 }
484
485 /**
486 * Prototype length setter
487 * @param self self reference
488 * @param length new length property
489 */
490 @Setter(name = "length", where = Where.PROTOTYPE, attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
491 public static void setProtoLength(final Object self, final Object length) {
492 length(self, length); // Same as instance setter but we can't make nasgen use the same method for prototype
493 }
494
495 static long validLength(final Object length) {
496 // ES5 15.4.5.1, steps 3.c and 3.d require two ToNumber conversions here
497 final double doubleLength = JSType.toNumber(length);
498 if (doubleLength != JSType.toUint32(length)) {
499 throw rangeError("inappropriate.array.length", ScriptRuntime.safeToString(length));
500 }
501 return (long) doubleLength;
502 }
503
504 /**
505 * ECMA 15.4.4.2 Array.prototype.toString ( )
506 *
507 * @param self self reference
508 * @return string representation of array
509 */
510 @Function(attributes = Attribute.NOT_ENUMERABLE)
511 public static Object toString(final Object self) {
512 final Object obj = Global.toObject(self);
513 if (obj instanceof ScriptObject) {
514 final InvokeByName joinInvoker = getJOIN();
515 final ScriptObject sobj = (ScriptObject)obj;
516 try {
517 final Object join = joinInvoker.getGetter().invokeExact(sobj);
518 if (Bootstrap.isCallable(join)) {
519 return joinInvoker.getInvoker().invokeExact(join, sobj);
520 }
521 } catch (final RuntimeException | Error e) {
522 throw e;
523 } catch (final Throwable t) {
524 throw new RuntimeException(t);
525 }
526 }
527
528 // FIXME: should lookup Object.prototype.toString and call that?
529 return ScriptRuntime.builtinObjectToString(self);
530 }
531
532 /**
533 * Assert that an array is numeric, if not throw type error
534 * @param self self array to check
535 * @return true if numeric
536 */
537 @Function(attributes = Attribute.NOT_ENUMERABLE)
538 public static Object assertNumeric(final Object self) {
539 if(!(self instanceof NativeArray && ((NativeArray)self).getArray().getOptimisticType().isNumeric())) {
540 throw typeError("not.a.numeric.array", ScriptRuntime.safeToString(self));
541 }
542 return Boolean.TRUE;
543 }
544
545 /**
546 * ECMA 15.4.4.3 Array.prototype.toLocaleString ( )
547 *
548 * @param self self reference
549 * @return locale specific string representation for array
550 */
551 @Function(attributes = Attribute.NOT_ENUMERABLE)
552 public static String toLocaleString(final Object self) {
553 final StringBuilder sb = new StringBuilder();
554 final Iterator<Object> iter = arrayLikeIterator(self, true);
555
556 while (iter.hasNext()) {
557 final Object obj = iter.next();
558
559 if (obj != null && obj != ScriptRuntime.UNDEFINED) {
560 final Object val = JSType.toScriptObject(obj);
561
562 try {
563 if (val instanceof ScriptObject) {
564 final InvokeByName localeInvoker = getTO_LOCALE_STRING();
565 final ScriptObject sobj = (ScriptObject)val;
566 final Object toLocaleString = localeInvoker.getGetter().invokeExact(sobj);
567
568 if (Bootstrap.isCallable(toLocaleString)) {
569 sb.append((String)localeInvoker.getInvoker().invokeExact(toLocaleString, sobj));
570 } else {
571 throw typeError("not.a.function", "toLocaleString");
572 }
573 }
574 } catch (final Error|RuntimeException t) {
575 throw t;
576 } catch (final Throwable t) {
577 throw new RuntimeException(t);
578 }
579 }
580
581 if (iter.hasNext()) {
582 sb.append(",");
583 }
584 }
585
586 return sb.toString();
587 }
588
589 /**
590 * ECMA 15.4.2.2 new Array (len)
591 *
592 * @param newObj was the new operator used to instantiate this array
593 * @param self self reference
594 * @param args arguments (length)
595 * @return the new NativeArray
596 */
597 @Constructor(arity = 1)
598 public static NativeArray construct(final boolean newObj, final Object self, final Object... args) {
599 switch (args.length) {
600 case 0:
601 return new NativeArray(0);
602 case 1:
603 final Object len = args[0];
604 if (len instanceof Number) {
605 long length;
606 if (len instanceof Integer || len instanceof Long) {
607 length = ((Number) len).longValue();
608 if (length >= 0 && length < JSType.MAX_UINT) {
609 return new NativeArray(length);
610 }
611 }
612
613 length = JSType.toUint32(len);
614
615 /*
616 * If the argument len is a Number and ToUint32(len) is equal to
617 * len, then the length property of the newly constructed object
618 * is set to ToUint32(len). If the argument len is a Number and
619 * ToUint32(len) is not equal to len, a RangeError exception is
620 * thrown.
621 */
622 final double numberLength = ((Number) len).doubleValue();
623 if (length != numberLength) {
624 throw rangeError("inappropriate.array.length", JSType.toString(numberLength));
625 }
626
627 return new NativeArray(length);
628 }
629 /*
630 * If the argument len is not a Number, then the length property of
631 * the newly constructed object is set to 1 and the 0 property of
632 * the newly constructed object is set to len
633 */
634 return new NativeArray(new Object[]{args[0]});
635 //fallthru
636 default:
637 return new NativeArray(args);
638 }
639 }
640
641 /**
642 * ECMA 15.4.2.2 new Array (len)
643 *
644 * Specialized constructor for zero arguments - empty array
645 *
646 * @param newObj was the new operator used to instantiate this array
647 * @param self self reference
648 * @return the new NativeArray
649 */
650 @SpecializedFunction(isConstructor=true)
651 public static NativeArray construct(final boolean newObj, final Object self) {
652 return new NativeArray(0);
653 }
654
655 /**
656 * ECMA 15.4.2.2 new Array (len)
657 *
658 * Specialized constructor for zero arguments - empty array
659 *
660 * @param newObj was the new operator used to instantiate this array
661 * @param self self reference
662 * @param element first element
663 * @return the new NativeArray
664 */
665 @SpecializedFunction(isConstructor=true)
666 public static Object construct(final boolean newObj, final Object self, final boolean element) {
667 return new NativeArray(new Object[] { element });
668 }
669
670 /**
671 * ECMA 15.4.2.2 new Array (len)
672 *
673 * Specialized constructor for one integer argument (length)
674 *
675 * @param newObj was the new operator used to instantiate this array
676 * @param self self reference
677 * @param length array length
678 * @return the new NativeArray
679 */
680 @SpecializedFunction(isConstructor=true)
681 public static NativeArray construct(final boolean newObj, final Object self, final int length) {
682 if (length >= 0) {
683 return new NativeArray(length);
684 }
685
686 return construct(newObj, self, new Object[]{length});
687 }
688
689 /**
690 * ECMA 15.4.2.2 new Array (len)
691 *
692 * Specialized constructor for one long argument (length)
693 *
694 * @param newObj was the new operator used to instantiate this array
695 * @param self self reference
696 * @param length array length
697 * @return the new NativeArray
698 */
699 @SpecializedFunction(isConstructor=true)
700 public static NativeArray construct(final boolean newObj, final Object self, final long length) {
701 if (length >= 0L && length <= JSType.MAX_UINT) {
702 return new NativeArray(length);
703 }
704
705 return construct(newObj, self, new Object[]{length});
706 }
707
708 /**
709 * ECMA 15.4.2.2 new Array (len)
710 *
711 * Specialized constructor for one double argument (length)
712 *
713 * @param newObj was the new operator used to instantiate this array
714 * @param self self reference
715 * @param length array length
716 * @return the new NativeArray
717 */
718 @SpecializedFunction(isConstructor=true)
719 public static NativeArray construct(final boolean newObj, final Object self, final double length) {
720 final long uint32length = JSType.toUint32(length);
721
722 if (uint32length == length) {
723 return new NativeArray(uint32length);
724 }
725
726 return construct(newObj, self, new Object[]{length});
727 }
728
729 /**
730 * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] )
731 *
732 * @param self self reference
733 * @param arg argument
734 * @return resulting NativeArray
735 */
736 @SpecializedFunction(linkLogic=ConcatLinkLogic.class)
737 public static NativeArray concat(final Object self, final int arg) {
738 final ContinuousArrayData newData = getContinuousArrayDataCCE(self, Integer.class).copy(); //get at least an integer data copy of this data
739 newData.fastPush(arg); //add an integer to its end
740 return new NativeArray(newData);
741 }
742
743 /**
744 * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] )
745 *
746 * @param self self reference
747 * @param arg argument
748 * @return resulting NativeArray
749 */
750 @SpecializedFunction(linkLogic=ConcatLinkLogic.class)
751 public static NativeArray concat(final Object self, final long arg) {
752 final ContinuousArrayData newData = getContinuousArrayDataCCE(self, Long.class).copy(); //get at least a long array data copy of this data
753 newData.fastPush(arg); //add a long at the end
754 return new NativeArray(newData);
755 }
756
757 /**
758 * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] )
759 *
760 * @param self self reference
761 * @param arg argument
762 * @return resulting NativeArray
763 */
764 @SpecializedFunction(linkLogic=ConcatLinkLogic.class)
765 public static NativeArray concat(final Object self, final double arg) {
766 final ContinuousArrayData newData = getContinuousArrayDataCCE(self, Double.class).copy(); //get at least a number array data copy of this data
767 newData.fastPush(arg); //add a double at the end
768 return new NativeArray(newData);
769 }
770
771 /**
772 * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] )
773 *
774 * @param self self reference
775 * @param arg argument
776 * @return resulting NativeArray
777 */
778 @SpecializedFunction(linkLogic=ConcatLinkLogic.class)
779 public static NativeArray concat(final Object self, final Object arg) {
780 //arg is [NativeArray] of same type.
781 final ContinuousArrayData selfData = getContinuousArrayDataCCE(self);
782 final ContinuousArrayData newData;
783
784 if (arg instanceof NativeArray) {
785 final ContinuousArrayData argData = (ContinuousArrayData)((NativeArray)arg).getArray();
786 if (argData.isEmpty()) {
787 newData = selfData.copy();
788 } else if (selfData.isEmpty()) {
789 newData = argData.copy();
790 } else {
791 final Class<?> widestElementType = selfData.widest(argData).getBoxedElementType();
792 newData = ((ContinuousArrayData)selfData.convert(widestElementType)).fastConcat((ContinuousArrayData)argData.convert(widestElementType));
793 }
794 } else {
795 newData = getContinuousArrayDataCCE(self, Object.class).copy();
796 newData.fastPush(arg);
797 }
798
799 return new NativeArray(newData);
800 }
801
802 /**
803 * ECMA 15.4.4.4 Array.prototype.concat ( [ item1 [ , item2 [ , ... ] ] ] )
804 *
805 * @param self self reference
806 * @param args arguments
807 * @return resulting NativeArray
808 */
809 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
810 public static NativeArray concat(final Object self, final Object... args) {
811 final ArrayList<Object> list = new ArrayList<>();
812
813 concatToList(list, Global.toObject(self));
814
815 for (final Object obj : args) {
816 concatToList(list, obj);
817 }
818
819 return new NativeArray(list.toArray());
820 }
821
822 private static void concatToList(final ArrayList<Object> list, final Object obj) {
823 final boolean isScriptArray = isArray(obj);
824 final boolean isScriptObject = isScriptArray || obj instanceof ScriptObject;
825 if (isScriptArray || obj instanceof Iterable || (obj != null && obj.getClass().isArray())) {
826 final Iterator<Object> iter = arrayLikeIterator(obj, true);
827 if (iter.hasNext()) {
828 for (int i = 0; iter.hasNext(); ++i) {
829 final Object value = iter.next();
830 final boolean lacksIndex = obj != null && !((ScriptObject)obj).has(i);
831 if (value == ScriptRuntime.UNDEFINED && isScriptObject && lacksIndex) {
832 // TODO: eventually rewrite arrayLikeIterator to use a three-state enum for handling
833 // UNDEFINED instead of an "includeUndefined" boolean with states SKIP, INCLUDE,
834 // RETURN_EMPTY. Until then, this is how we'll make sure that empty elements don't make it
835 // into the concatenated array.
836 list.add(ScriptRuntime.EMPTY);
837 } else {
838 list.add(value);
839 }
840 }
841 } else if (!isScriptArray) {
842 list.add(obj); // add empty object, but not an empty array
843 }
844 } else {
845 // single element, add it
846 list.add(obj);
847 }
848 }
849
850 /**
851 * ECMA 15.4.4.5 Array.prototype.join (separator)
852 *
853 * @param self self reference
854 * @param separator element separator
855 * @return string representation after join
856 */
857 @Function(attributes = Attribute.NOT_ENUMERABLE)
858 public static String join(final Object self, final Object separator) {
859 final StringBuilder sb = new StringBuilder();
860 final Iterator<Object> iter = arrayLikeIterator(self, true);
861 final String sep = separator == ScriptRuntime.UNDEFINED ? "," : JSType.toString(separator);
862
863 while (iter.hasNext()) {
864 final Object obj = iter.next();
865
866 if (obj != null && obj != ScriptRuntime.UNDEFINED) {
867 sb.append(JSType.toString(obj));
868 }
869
870 if (iter.hasNext()) {
871 sb.append(sep);
872 }
873 }
874
875 return sb.toString();
876 }
877
878 /**
879 * Specialization of pop for ContinuousArrayData
880 * The link guard checks that the array is continuous AND not empty.
881 * The runtime guard checks that the guard is continuous (CCE otherwise)
882 *
883 * Primitive specialization, {@link LinkLogic}
884 *
885 * @param self self reference
886 * @return element popped
887 * @throws ClassCastException if array is empty, facilitating Undefined return value
888 */
889 @SpecializedFunction(name="pop", linkLogic=PopLinkLogic.class)
890 public static int popInt(final Object self) {
891 //must be non empty IntArrayData
892 return getContinuousNonEmptyArrayDataCCE(self, IntElements.class).fastPopInt();
893 }
894
895 /**
896 * Specialization of pop for ContinuousArrayData
897 *
898 * Primitive specialization, {@link LinkLogic}
899 *
900 * @param self self reference
901 * @return element popped
902 * @throws ClassCastException if array is empty, facilitating Undefined return value
903 */
904 @SpecializedFunction(name="pop", linkLogic=PopLinkLogic.class)
905 public static long popLong(final Object self) {
906 //must be non empty Int or LongArrayData
907 return getContinuousNonEmptyArrayDataCCE(self, IntOrLongElements.class).fastPopLong();
908 }
909
910 /**
911 * Specialization of pop for ContinuousArrayData
912 *
913 * Primitive specialization, {@link LinkLogic}
914 *
915 * @param self self reference
916 * @return element popped
917 * @throws ClassCastException if array is empty, facilitating Undefined return value
918 */
919 @SpecializedFunction(name="pop", linkLogic=PopLinkLogic.class)
920 public static double popDouble(final Object self) {
921 //must be non empty int long or double array data
922 return getContinuousNonEmptyArrayDataCCE(self, NumericElements.class).fastPopDouble();
923 }
924
925 /**
926 * Specialization of pop for ContinuousArrayData
927 *
928 * Primitive specialization, {@link LinkLogic}
929 *
930 * @param self self reference
931 * @return element popped
932 * @throws ClassCastException if array is empty, facilitating Undefined return value
933 */
934 @SpecializedFunction(name="pop", linkLogic=PopLinkLogic.class)
935 public static Object popObject(final Object self) {
936 //can be any data, because the numeric ones will throw cce and force relink
937 return getContinuousArrayDataCCE(self, null).fastPopObject();
938 }
939
940 /**
941 * ECMA 15.4.4.6 Array.prototype.pop ()
942 *
943 * @param self self reference
944 * @return array after pop
945 */
946 @Function(attributes = Attribute.NOT_ENUMERABLE)
947 public static Object pop(final Object self) {
948 try {
949 final ScriptObject sobj = (ScriptObject)self;
950
951 if (bulkable(sobj)) {
952 return sobj.getArray().pop();
953 }
954
955 final long len = JSType.toUint32(sobj.getLength());
956
957 if (len == 0) {
958 sobj.set("length", 0, CALLSITE_STRICT);
959 return ScriptRuntime.UNDEFINED;
960 }
961
962 final long index = len - 1;
963 final Object element = sobj.get(index);
964
965 sobj.delete(index, true);
966 sobj.set("length", index, CALLSITE_STRICT);
967
968 return element;
969 } catch (final ClassCastException | NullPointerException e) {
970 throw typeError("not.an.object", ScriptRuntime.safeToString(self));
971 }
972 }
973
974 /**
975 * ECMA 15.4.4.7 Array.prototype.push (args...)
976 *
977 * Primitive specialization, {@link LinkLogic}
978 *
979 * @param self self reference
980 * @param arg a primitive to push
981 * @return array length after push
982 */
983 @SpecializedFunction(linkLogic=PushLinkLogic.class)
984 public static long push(final Object self, final int arg) {
985 return getContinuousArrayDataCCE(self, Integer.class).fastPush(arg);
986 }
987
988 /**
989 * ECMA 15.4.4.7 Array.prototype.push (args...)
990 *
991 * Primitive specialization, {@link LinkLogic}
992 *
993 * @param self self reference
994 * @param arg a primitive to push
995 * @return array length after push
996 */
997 @SpecializedFunction(linkLogic=PushLinkLogic.class)
998 public static long push(final Object self, final long arg) {
999 return getContinuousArrayDataCCE(self, Long.class).fastPush(arg);
1000 }
1001
1002 /**
1003 * ECMA 15.4.4.7 Array.prototype.push (args...)
1004 *
1005 * Primitive specialization, {@link LinkLogic}
1006 *
1007 * @param self self reference
1008 * @param arg a primitive to push
1009 * @return array length after push
1010 */
1011 @SpecializedFunction(linkLogic=PushLinkLogic.class)
1012 public static long push(final Object self, final double arg) {
1013 return getContinuousArrayDataCCE(self, Double.class).fastPush(arg);
1014 }
1015
1016 /**
1017 * ECMA 15.4.4.7 Array.prototype.push (args...)
1018 *
1019 * Primitive specialization, {@link LinkLogic}
1020 *
1021 * @param self self reference
1022 * @param arg a primitive to push
1023 * @return array length after push
1024 */
1025 @SpecializedFunction(name="push", linkLogic=PushLinkLogic.class)
1026 public static long pushObject(final Object self, final Object arg) {
1027 return getContinuousArrayDataCCE(self, Object.class).fastPush(arg);
1028 }
1029
1030 /**
1031 * ECMA 15.4.4.7 Array.prototype.push (args...)
1032 *
1033 * @param self self reference
1034 * @param args arguments to push
1035 * @return array length after pushes
1036 */
1037 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1038 public static Object push(final Object self, final Object... args) {
1039 try {
1040 final ScriptObject sobj = (ScriptObject)self;
1041
1042 if (bulkable(sobj) && sobj.getArray().length() + args.length <= JSType.MAX_UINT) {
1043 final ArrayData newData = sobj.getArray().push(true, args);
1044 sobj.setArray(newData);
1045 return newData.length();
1046 }
1047
1048 long len = JSType.toUint32(sobj.getLength());
1049 for (final Object element : args) {
1050 sobj.set(len++, element, CALLSITE_STRICT);
1051 }
1052 sobj.set("length", len, CALLSITE_STRICT);
1053
1054 return len;
1055 } catch (final ClassCastException | NullPointerException e) {
1056 throw typeError(Context.getGlobal(), e, "not.an.object", ScriptRuntime.safeToString(self));
1057 }
1058 }
1059
1060 /**
1061 * ECMA 15.4.4.7 Array.prototype.push (args...) specialized for single object argument
1062 *
1063 * @param self self reference
1064 * @param arg argument to push
1065 * @return array after pushes
1066 */
1067 @SpecializedFunction
1068 public static long push(final Object self, final Object arg) {
1069 try {
1070 final ScriptObject sobj = (ScriptObject)self;
1071 final ArrayData arrayData = sobj.getArray();
1072 final long length = arrayData.length();
1073 if (bulkable(sobj) && length < JSType.MAX_UINT) {
1074 sobj.setArray(arrayData.push(true, arg));
1075 return length + 1;
1076 }
1077
1078 long len = JSType.toUint32(sobj.getLength());
1079 sobj.set(len++, arg, CALLSITE_STRICT);
1080 sobj.set("length", len, CALLSITE_STRICT);
1081 return len;
1082 } catch (final ClassCastException | NullPointerException e) {
1083 throw typeError("not.an.object", ScriptRuntime.safeToString(self));
1084 }
1085 }
1086
1087 /**
1088 * ECMA 15.4.4.8 Array.prototype.reverse ()
1089 *
1090 * @param self self reference
1091 * @return reversed array
1092 */
1093 @Function(attributes = Attribute.NOT_ENUMERABLE)
1094 public static Object reverse(final Object self) {
1095 try {
1096 final ScriptObject sobj = (ScriptObject)self;
1097 final long len = JSType.toUint32(sobj.getLength());
1098 final long middle = len / 2;
1099
1100 for (long lower = 0; lower != middle; lower++) {
1101 final long upper = len - lower - 1;
1102 final Object lowerValue = sobj.get(lower);
1103 final Object upperValue = sobj.get(upper);
1104 final boolean lowerExists = sobj.has(lower);
1105 final boolean upperExists = sobj.has(upper);
1106
1107 if (lowerExists && upperExists) {
1108 sobj.set(lower, upperValue, CALLSITE_STRICT);
1109 sobj.set(upper, lowerValue, CALLSITE_STRICT);
1110 } else if (!lowerExists && upperExists) {
1111 sobj.set(lower, upperValue, CALLSITE_STRICT);
1112 sobj.delete(upper, true);
1113 } else if (lowerExists && !upperExists) {
1114 sobj.delete(lower, true);
1115 sobj.set(upper, lowerValue, CALLSITE_STRICT);
1116 }
1117 }
1118 return sobj;
1119 } catch (final ClassCastException | NullPointerException e) {
1120 throw typeError("not.an.object", ScriptRuntime.safeToString(self));
1121 }
1122 }
1123
1124 /**
1125 * ECMA 15.4.4.9 Array.prototype.shift ()
1126 *
1127 * @param self self reference
1128 * @return shifted array
1129 */
1130 @Function(attributes = Attribute.NOT_ENUMERABLE)
1131 public static Object shift(final Object self) {
1132 final Object obj = Global.toObject(self);
1133
1134 Object first = ScriptRuntime.UNDEFINED;
1135
1136 if (!(obj instanceof ScriptObject)) {
1137 return first;
1138 }
1139
1140 final ScriptObject sobj = (ScriptObject) obj;
1141
1142 long len = JSType.toUint32(sobj.getLength());
1143
1144 if (len > 0) {
1145 first = sobj.get(0);
1146
1147 if (bulkable(sobj)) {
1148 sobj.getArray().shiftLeft(1);
1149 } else {
1150 boolean hasPrevious = true;
1151 for (long k = 1; k < len; k++) {
1152 final boolean hasCurrent = sobj.has(k);
1153 if (hasCurrent) {
1154 sobj.set(k - 1, sobj.get(k), CALLSITE_STRICT);
1155 } else if (hasPrevious) {
1156 sobj.delete(k - 1, true);
1157 }
1158 hasPrevious = hasCurrent;
1159 }
1160 }
1161 sobj.delete(--len, true);
1162 } else {
1163 len = 0;
1164 }
1165
1166 sobj.set("length", len, CALLSITE_STRICT);
1167
1168 return first;
1169 }
1170
1171 /**
1172 * ECMA 15.4.4.10 Array.prototype.slice ( start [ , end ] )
1173 *
1174 * @param self self reference
1175 * @param start start of slice (inclusive)
1176 * @param end end of slice (optional, exclusive)
1177 * @return sliced array
1178 */
1179 @Function(attributes = Attribute.NOT_ENUMERABLE)
1180 public static Object slice(final Object self, final Object start, final Object end) {
1181 final Object obj = Global.toObject(self);
1182 if (!(obj instanceof ScriptObject)) {
1183 return ScriptRuntime.UNDEFINED;
1184 }
1185
1186 final ScriptObject sobj = (ScriptObject)obj;
1187 final long len = JSType.toUint32(sobj.getLength());
1188 final long relativeStart = JSType.toLong(start);
1189 final long relativeEnd = end == ScriptRuntime.UNDEFINED ? len : JSType.toLong(end);
1190
1191 long k = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len);
1192 final long finale = relativeEnd < 0 ? Math.max(len + relativeEnd, 0) : Math.min(relativeEnd, len);
1193
1194 if (k >= finale) {
1195 return new NativeArray(0);
1196 }
1197
1198 if (bulkable(sobj)) {
1199 return new NativeArray(sobj.getArray().slice(k, finale));
1200 }
1201
1202 // Construct array with proper length to have a deleted filter on undefined elements
1203 final NativeArray copy = new NativeArray(finale - k);
1204 for (long n = 0; k < finale; n++, k++) {
1205 if (sobj.has(k)) {
1206 copy.defineOwnProperty(ArrayIndex.getArrayIndex(n), sobj.get(k));
1207 }
1208 }
1209
1210 return copy;
1211 }
1212
1213 private static ScriptFunction compareFunction(final Object comparefn) {
1214 if (comparefn == ScriptRuntime.UNDEFINED) {
1215 return null;
1216 }
1217
1218 if (! (comparefn instanceof ScriptFunction)) {
1219 throw typeError("not.a.function", ScriptRuntime.safeToString(comparefn));
1220 }
1221
1222 return (ScriptFunction)comparefn;
1223 }
1224
1225 private static Object[] sort(final Object[] array, final Object comparefn) {
1226 final ScriptFunction cmp = compareFunction(comparefn);
1227
1228 final List<Object> list = Arrays.asList(array);
1229 final Object cmpThis = cmp == null || cmp.isStrict() ? ScriptRuntime.UNDEFINED : Global.instance();
1230
1231 try {
1232 Collections.sort(list, new Comparator<Object>() {
1233 private final MethodHandle call_cmp = getCALL_CMP();
1234 @Override
1235 public int compare(final Object x, final Object y) {
1236 if (x == ScriptRuntime.UNDEFINED && y == ScriptRuntime.UNDEFINED) {
1237 return 0;
1238 } else if (x == ScriptRuntime.UNDEFINED) {
1239 return 1;
1240 } else if (y == ScriptRuntime.UNDEFINED) {
1241 return -1;
1242 }
1243
1244 if (cmp != null) {
1245 try {
1246 return (int)Math.signum((double)call_cmp.invokeExact(cmp, cmpThis, x, y));
1247 } catch (final RuntimeException | Error e) {
1248 throw e;
1249 } catch (final Throwable t) {
1250 throw new RuntimeException(t);
1251 }
1252 }
1253
1254 return JSType.toString(x).compareTo(JSType.toString(y));
1255 }
1256 });
1257 } catch (final IllegalArgumentException iae) {
1258 // Collections.sort throws IllegalArgumentException when
1259 // Comparison method violates its general contract
1260
1261 // See ECMA spec 15.4.4.11 Array.prototype.sort (comparefn).
1262 // If "comparefn" is not undefined and is not a consistent
1263 // comparison function for the elements of this array, the
1264 // behaviour of sort is implementation-defined.
1265 }
1266
1267 return list.toArray(new Object[array.length]);
1268 }
1269
1270 /**
1271 * ECMA 15.4.4.11 Array.prototype.sort ( comparefn )
1272 *
1273 * @param self self reference
1274 * @param comparefn element comparison function
1275 * @return sorted array
1276 */
1277 @Function(attributes = Attribute.NOT_ENUMERABLE)
1278 public static ScriptObject sort(final Object self, final Object comparefn) {
1279 try {
1280 final ScriptObject sobj = (ScriptObject) self;
1281 final long len = JSType.toUint32(sobj.getLength());
1282 ArrayData array = sobj.getArray();
1283
1284 if (len > 1) {
1285 // Get only non-missing elements. Missing elements go at the end
1286 // of the sorted array. So, just don't copy these to sort input.
1287 final ArrayList<Object> src = new ArrayList<>();
1288
1289 for (final Iterator<Long> iter = array.indexIterator(); iter.hasNext(); ) {
1290 final long index = iter.next();
1291 if (index >= len) {
1292 break;
1293 }
1294 src.add(array.getObject((int)index));
1295 }
1296
1297 final Object[] sorted = sort(src.toArray(), comparefn);
1298
1299 for (int i = 0; i < sorted.length; i++) {
1300 array = array.set(i, sorted[i], true);
1301 }
1302
1303 // delete missing elements - which are at the end of sorted array
1304 if (sorted.length != len) {
1305 array = array.delete(sorted.length, len - 1);
1306 }
1307
1308 sobj.setArray(array);
1309 }
1310
1311 return sobj;
1312 } catch (final ClassCastException | NullPointerException e) {
1313 throw typeError("not.an.object", ScriptRuntime.safeToString(self));
1314 }
1315 }
1316
1317 /**
1318 * ECMA 15.4.4.12 Array.prototype.splice ( start, deleteCount [ item1 [ , item2 [ , ... ] ] ] )
1319 *
1320 * @param self self reference
1321 * @param args arguments
1322 * @return result of splice
1323 */
1324 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 2)
1325 public static Object splice(final Object self, final Object... args) {
1326 final Object obj = Global.toObject(self);
1327
1328 if (!(obj instanceof ScriptObject)) {
1329 return ScriptRuntime.UNDEFINED;
1330 }
1331
1332 final Object start = args.length > 0 ? args[0] : ScriptRuntime.UNDEFINED;
1333 final Object deleteCount = args.length > 1 ? args[1] : ScriptRuntime.UNDEFINED;
1334
1335 Object[] items;
1336
1337 if (args.length > 2) {
1338 items = new Object[args.length - 2];
1339 System.arraycopy(args, 2, items, 0, items.length);
1340 } else {
1341 items = ScriptRuntime.EMPTY_ARRAY;
1342 }
1343
1344 final ScriptObject sobj = (ScriptObject)obj;
1345 final long len = JSType.toUint32(sobj.getLength());
1346 final long relativeStart = JSType.toLong(start);
1347
1348 final long actualStart = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len);
1349 final long actualDeleteCount = Math.min(Math.max(JSType.toLong(deleteCount), 0), len - actualStart);
1350
1351 NativeArray returnValue;
1352
1353 if (actualStart <= Integer.MAX_VALUE && actualDeleteCount <= Integer.MAX_VALUE && bulkable(sobj)) {
1354 try {
1355 returnValue = new NativeArray(sobj.getArray().fastSplice((int)actualStart, (int)actualDeleteCount, items.length));
1356
1357 // Since this is a dense bulkable array we can use faster defineOwnProperty to copy new elements
1358 int k = (int) actualStart;
1359 for (int i = 0; i < items.length; i++, k++) {
1360 sobj.defineOwnProperty(k, items[i]);
1361 }
1362 } catch (final UnsupportedOperationException uoe) {
1363 returnValue = slowSplice(sobj, actualStart, actualDeleteCount, items, len);
1364 }
1365 } else {
1366 returnValue = slowSplice(sobj, actualStart, actualDeleteCount, items, len);
1367 }
1368
1369 return returnValue;
1370 }
1371
1372 private static NativeArray slowSplice(final ScriptObject sobj, final long start, final long deleteCount, final Object[] items, final long len) {
1373
1374 final NativeArray array = new NativeArray(deleteCount);
1375
1376 for (long k = 0; k < deleteCount; k++) {
1377 final long from = start + k;
1378
1379 if (sobj.has(from)) {
1380 array.defineOwnProperty(ArrayIndex.getArrayIndex(k), sobj.get(from));
1381 }
1382 }
1383
1384 if (items.length < deleteCount) {
1385 for (long k = start; k < len - deleteCount; k++) {
1386 final long from = k + deleteCount;
1387 final long to = k + items.length;
1388
1389 if (sobj.has(from)) {
1390 sobj.set(to, sobj.get(from), CALLSITE_STRICT);
1391 } else {
1392 sobj.delete(to, true);
1393 }
1394 }
1395
1396 for (long k = len; k > len - deleteCount + items.length; k--) {
1397 sobj.delete(k - 1, true);
1398 }
1399 } else if (items.length > deleteCount) {
1400 for (long k = len - deleteCount; k > start; k--) {
1401 final long from = k + deleteCount - 1;
1402 final long to = k + items.length - 1;
1403
1404 if (sobj.has(from)) {
1405 final Object fromValue = sobj.get(from);
1406 sobj.set(to, fromValue, CALLSITE_STRICT);
1407 } else {
1408 sobj.delete(to, true);
1409 }
1410 }
1411 }
1412
1413 long k = start;
1414 for (int i = 0; i < items.length; i++, k++) {
1415 sobj.set(k, items[i], CALLSITE_STRICT);
1416 }
1417
1418 final long newLength = len - deleteCount + items.length;
1419 sobj.set("length", newLength, CALLSITE_STRICT);
1420
1421 return array;
1422 }
1423
1424 /**
1425 * ECMA 15.4.4.13 Array.prototype.unshift ( [ item1 [ , item2 [ , ... ] ] ] )
1426 *
1427 * @param self self reference
1428 * @param items items for unshift
1429 * @return unshifted array
1430 */
1431 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1432 public static Object unshift(final Object self, final Object... items) {
1433 final Object obj = Global.toObject(self);
1434
1435 if (!(obj instanceof ScriptObject)) {
1436 return ScriptRuntime.UNDEFINED;
1437 }
1438
1439 final ScriptObject sobj = (ScriptObject)obj;
1440 final long len = JSType.toUint32(sobj.getLength());
1441
1442 if (items == null) {
1443 return ScriptRuntime.UNDEFINED;
1444 }
1445
1446 if (bulkable(sobj)) {
1447 sobj.getArray().shiftRight(items.length);
1448
1449 for (int j = 0; j < items.length; j++) {
1450 sobj.setArray(sobj.getArray().set(j, items[j], true));
1451 }
1452 } else {
1453 for (long k = len; k > 0; k--) {
1454 final long from = k - 1;
1455 final long to = k + items.length - 1;
1456
1457 if (sobj.has(from)) {
1458 final Object fromValue = sobj.get(from);
1459 sobj.set(to, fromValue, CALLSITE_STRICT);
1460 } else {
1461 sobj.delete(to, true);
1462 }
1463 }
1464
1465 for (int j = 0; j < items.length; j++) {
1466 sobj.set(j, items[j], CALLSITE_STRICT);
1467 }
1468 }
1469
1470 final long newLength = len + items.length;
1471 sobj.set("length", newLength, CALLSITE_STRICT);
1472
1473 return newLength;
1474 }
1475
1476 /**
1477 * ECMA 15.4.4.14 Array.prototype.indexOf ( searchElement [ , fromIndex ] )
1478 *
1479 * @param self self reference
1480 * @param searchElement element to search for
1481 * @param fromIndex start index of search
1482 * @return index of element, or -1 if not found
1483 */
1484 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1485 public static long indexOf(final Object self, final Object searchElement, final Object fromIndex) {
1486 try {
1487 final ScriptObject sobj = (ScriptObject)Global.toObject(self);
1488 final long len = JSType.toUint32(sobj.getLength());
1489 if (len == 0) {
1490 return -1;
1491 }
1492
1493 final long n = JSType.toLong(fromIndex);
1494 if (n >= len) {
1495 return -1;
1496 }
1497
1498
1499 for (long k = Math.max(0, n < 0 ? len - Math.abs(n) : n); k < len; k++) {
1500 if (sobj.has(k)) {
1501 if (ScriptRuntime.EQ_STRICT(sobj.get(k), searchElement)) {
1502 return k;
1503 }
1504 }
1505 }
1506 } catch (final ClassCastException | NullPointerException e) {
1507 //fallthru
1508 }
1509
1510 return -1;
1511 }
1512
1513 /**
1514 * ECMA 15.4.4.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
1515 *
1516 * @param self self reference
1517 * @param args arguments: element to search for and optional from index
1518 * @return index of element, or -1 if not found
1519 */
1520 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1521 public static long lastIndexOf(final Object self, final Object... args) {
1522 try {
1523 final ScriptObject sobj = (ScriptObject)Global.toObject(self);
1524 final long len = JSType.toUint32(sobj.getLength());
1525
1526 if (len == 0) {
1527 return -1;
1528 }
1529
1530 final Object searchElement = args.length > 0 ? args[0] : ScriptRuntime.UNDEFINED;
1531 final long n = args.length > 1 ? JSType.toLong(args[1]) : len - 1;
1532
1533 for (long k = n < 0 ? len - Math.abs(n) : Math.min(n, len - 1); k >= 0; k--) {
1534 if (sobj.has(k)) {
1535 if (ScriptRuntime.EQ_STRICT(sobj.get(k), searchElement)) {
1536 return k;
1537 }
1538 }
1539 }
1540 } catch (final ClassCastException | NullPointerException e) {
1541 throw typeError("not.an.object", ScriptRuntime.safeToString(self));
1542 }
1543
1544 return -1;
1545 }
1546
1547 /**
1548 * ECMA 15.4.4.16 Array.prototype.every ( callbackfn [ , thisArg ] )
1549 *
1550 * @param self self reference
1551 * @param callbackfn callback function per element
1552 * @param thisArg this argument
1553 * @return true if callback function return true for every element in the array, false otherwise
1554 */
1555 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1556 public static boolean every(final Object self, final Object callbackfn, final Object thisArg) {
1557 return applyEvery(Global.toObject(self), callbackfn, thisArg);
1558 }
1559
1560 private static boolean applyEvery(final Object self, final Object callbackfn, final Object thisArg) {
1561 return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, true) {
1562 private final MethodHandle everyInvoker = getEVERY_CALLBACK_INVOKER();
1563
1564 @Override
1565 protected boolean forEach(final Object val, final long i) throws Throwable {
1566 return result = (boolean)everyInvoker.invokeExact(callbackfn, thisArg, val, i, self);
1567 }
1568 }.apply();
1569 }
1570
1571 /**
1572 * ECMA 15.4.4.17 Array.prototype.some ( callbackfn [ , thisArg ] )
1573 *
1574 * @param self self reference
1575 * @param callbackfn callback function per element
1576 * @param thisArg this argument
1577 * @return true if callback function returned true for any element in the array, false otherwise
1578 */
1579 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1580 public static boolean some(final Object self, final Object callbackfn, final Object thisArg) {
1581 return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, false) {
1582 private final MethodHandle someInvoker = getSOME_CALLBACK_INVOKER();
1583
1584 @Override
1585 protected boolean forEach(final Object val, final long i) throws Throwable {
1586 return !(result = (boolean)someInvoker.invokeExact(callbackfn, thisArg, val, i, self));
1587 }
1588 }.apply();
1589 }
1590
1591 /**
1592 * ECMA 15.4.4.18 Array.prototype.forEach ( callbackfn [ , thisArg ] )
1593 *
1594 * @param self self reference
1595 * @param callbackfn callback function per element
1596 * @param thisArg this argument
1597 * @return undefined
1598 */
1599 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1600 public static Object forEach(final Object self, final Object callbackfn, final Object thisArg) {
1601 return new IteratorAction<Object>(Global.toObject(self), callbackfn, thisArg, ScriptRuntime.UNDEFINED) {
1602 private final MethodHandle forEachInvoker = getFOREACH_CALLBACK_INVOKER();
1603
1604 @Override
1605 protected boolean forEach(final Object val, final long i) throws Throwable {
1606 forEachInvoker.invokeExact(callbackfn, thisArg, val, i, self);
1607 return true;
1608 }
1609 }.apply();
1610 }
1611
1612 /**
1613 * ECMA 15.4.4.19 Array.prototype.map ( callbackfn [ , thisArg ] )
1614 *
1615 * @param self self reference
1616 * @param callbackfn callback function per element
1617 * @param thisArg this argument
1618 * @return array with elements transformed by map function
1619 */
1620 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1621 public static NativeArray map(final Object self, final Object callbackfn, final Object thisArg) {
1622 return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, null) {
1623 private final MethodHandle mapInvoker = getMAP_CALLBACK_INVOKER();
1624
1625 @Override
1626 protected boolean forEach(final Object val, final long i) throws Throwable {
1627 final Object r = mapInvoker.invokeExact(callbackfn, thisArg, val, i, self);
1628 result.defineOwnProperty(ArrayIndex.getArrayIndex(index), r);
1629 return true;
1630 }
1631
1632 @Override
1633 public void applyLoopBegin(final ArrayLikeIterator<Object> iter0) {
1634 // map return array should be of same length as source array
1635 // even if callback reduces source array length
1636 result = new NativeArray(iter0.getLength());
1637 }
1638 }.apply();
1639 }
1640
1641 /**
1642 * ECMA 15.4.4.20 Array.prototype.filter ( callbackfn [ , thisArg ] )
1643 *
1644 * @param self self reference
1645 * @param callbackfn callback function per element
1646 * @param thisArg this argument
1647 * @return filtered array
1648 */
1649 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1650 public static NativeArray filter(final Object self, final Object callbackfn, final Object thisArg) {
1651 return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, new NativeArray()) {
1652 private long to = 0;
1653 private final MethodHandle filterInvoker = getFILTER_CALLBACK_INVOKER();
1654
1655 @Override
1656 protected boolean forEach(final Object val, final long i) throws Throwable {
1657 if ((boolean)filterInvoker.invokeExact(callbackfn, thisArg, val, i, self)) {
1658 result.defineOwnProperty(ArrayIndex.getArrayIndex(to++), val);
1659 }
1660 return true;
1661 }
1662 }.apply();
1663 }
1664
1665 private static Object reduceInner(final ArrayLikeIterator<Object> iter, final Object self, final Object... args) {
1666 final Object callbackfn = args.length > 0 ? args[0] : ScriptRuntime.UNDEFINED;
1667 final boolean initialValuePresent = args.length > 1;
1668
1669 Object initialValue = initialValuePresent ? args[1] : ScriptRuntime.UNDEFINED;
1670
1671 if (callbackfn == ScriptRuntime.UNDEFINED) {
1672 throw typeError("not.a.function", "undefined");
1673 }
1674
1675 if (!initialValuePresent) {
1676 if (iter.hasNext()) {
1677 initialValue = iter.next();
1678 } else {
1679 throw typeError("array.reduce.invalid.init");
1680 }
1681 }
1682
1683 //if initial value is ScriptRuntime.UNDEFINED - step forward once.
1684 return new IteratorAction<Object>(Global.toObject(self), callbackfn, ScriptRuntime.UNDEFINED, initialValue, iter) {
1685 private final MethodHandle reduceInvoker = getREDUCE_CALLBACK_INVOKER();
1686
1687 @Override
1688 protected boolean forEach(final Object val, final long i) throws Throwable {
1689 // TODO: why can't I declare the second arg as Undefined.class?
1690 result = reduceInvoker.invokeExact(callbackfn, ScriptRuntime.UNDEFINED, result, val, i, self);
1691 return true;
1692 }
1693 }.apply();
1694 }
1695
1696 /**
1697 * ECMA 15.4.4.21 Array.prototype.reduce ( callbackfn [ , initialValue ] )
1698 *
1699 * @param self self reference
1700 * @param args arguments to reduce
1701 * @return accumulated result
1702 */
1703 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1704 public static Object reduce(final Object self, final Object... args) {
1705 return reduceInner(arrayLikeIterator(self), self, args);
1706 }
1707
1708 /**
1709 * ECMA 15.4.4.22 Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
1710 *
1711 * @param self self reference
1712 * @param args arguments to reduce
1713 * @return accumulated result
1714 */
1715 @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
1716 public static Object reduceRight(final Object self, final Object... args) {
1717 return reduceInner(reverseArrayLikeIterator(self), self, args);
1718 }
1719
1720 /**
1721 * Determine if Java bulk array operations may be used on the underlying
1722 * storage. This is possible only if the object's prototype chain is empty
1723 * or each of the prototypes in the chain is empty.
1724 *
1725 * @param self the object to examine
1726 * @return true if optimizable
1727 */
1728 private static boolean bulkable(final ScriptObject self) {
1729 return self.isArray() && !hasInheritedArrayEntries(self) && !self.isLengthNotWritable();
1730 }
1731
1732 private static boolean hasInheritedArrayEntries(final ScriptObject self) {
1733 ScriptObject proto = self.getProto();
1734 while (proto != null) {
1735 if (proto.hasArrayEntries()) {
1736 return true;
1737 }
1738 proto = proto.getProto();
1739 }
1740
1741 return false;
1742 }
1743
1744 @Override
1745 public String toString() {
1746 return "NativeArray@" + Debug.id(this) + " [" + getArray().getClass().getSimpleName() + ']';
1747 }
1748
1749 @Override
1750 public SpecializedFunction.LinkLogic getLinkLogic(final Class<? extends LinkLogic> clazz) {
1751 if (clazz == PushLinkLogic.class) {
1752 return PushLinkLogic.INSTANCE;
1753 } else if (clazz == PopLinkLogic.class) {
1754 return PopLinkLogic.INSTANCE;
1755 } else if (clazz == ConcatLinkLogic.class) {
1756 return ConcatLinkLogic.INSTANCE;
1757 }
1758 return null;
1759 }
1760
1761 @Override
1762 public boolean hasPerInstanceAssumptions() {
1763 return true; //length writable switchpoint
1764 }
1765
1766 /**
1767 * This is an abstract super class that contains common functionality for all
1768 * specialized optimistic builtins in NativeArray. For example, it handles the
1769 * modification switchpoint which is touched when length is written.
1770 */
1771 private static abstract class ArrayLinkLogic extends SpecializedFunction.LinkLogic {
1772 protected ArrayLinkLogic() {
1773 }
1774
1775 protected static ContinuousArrayData getContinuousArrayData(final Object self) {
1776 try {
1777 //cast to NativeArray, to avoid cases like x = {0:0, 1:1}, x.length = 2, where we can't use the array push/pop
1778 return (ContinuousArrayData)((NativeArray)self).getArray();
1779 } catch (final Exception e) {
1780 return null;
1781 }
1782 }
1783
1784 /**
1785 * Push and pop callsites can throw ClassCastException as a mechanism to have them
1786 * relinked - this enabled fast checks of the kind of ((IntArrayData)arrayData).push(x)
1787 * for an IntArrayData only push - if this fails, a CCE will be thrown and we will relink
1788 */
1789 @Override
1790 public Class<? extends Throwable> getRelinkException() {
1791 return ClassCastException.class;
1792 }
1793 }
1794
1795 /**
1796 * This is linker logic for optimistic concatenations
1797 */
1798 private static final class ConcatLinkLogic extends ArrayLinkLogic {
1799 private static final LinkLogic INSTANCE = new ConcatLinkLogic();
1800
1801 @Override
1802 public boolean canLink(final Object self, final CallSiteDescriptor desc, final LinkRequest request) {
1803 final Object[] args = request.getArguments();
1804
1805 if (args.length != 3) { //single argument check
1806 return false;
1807 }
1808
1809 final ContinuousArrayData selfData = getContinuousArrayData(self);
1810 if (selfData == null) {
1811 return false;
1812 }
1813
1814 final Object arg = args[2];
1815 //args[2] continuousarray or non arraydata, let past non array datas
1816 if (arg instanceof NativeArray) {
1817 final ContinuousArrayData argData = getContinuousArrayData(arg);
1818 if (argData == null) {
1819 return false;
1820 }
1821 }
1822
1823 return true;
1824 }
1825 }
1826
1827 /**
1828 * This is linker logic for optimistic pushes
1829 */
1830 private static final class PushLinkLogic extends ArrayLinkLogic {
1831 private static final LinkLogic INSTANCE = new PushLinkLogic();
1832
1833 @Override
1834 public boolean canLink(final Object self, final CallSiteDescriptor desc, final LinkRequest request) {
1835 return getContinuousArrayData(self) != null;
1836 }
1837 }
1838
1839 /**
1840 * This is linker logic for optimistic pops
1841 */
1842 private static final class PopLinkLogic extends ArrayLinkLogic {
1843 private static final LinkLogic INSTANCE = new PopLinkLogic();
1844
1845 /**
1846 * We need to check if we are dealing with a continuous non empty array data here,
1847 * as pop with a primitive return value returns undefined for arrays with length 0
1848 */
1849 @Override
1850 public boolean canLink(final Object self, final CallSiteDescriptor desc, final LinkRequest request) {
1851 final ContinuousArrayData data = getContinuousNonEmptyArrayData(self);
1852 if (data != null) {
1853 final Class<?> elementType = data.getElementType();
1854 final Class<?> returnType = desc.getMethodType().returnType();
1855 final boolean typeFits = JSType.getAccessorTypeIndex(returnType) >= JSType.getAccessorTypeIndex(elementType);
1856 return typeFits;
1857 }
1858 return false;
1859 }
1860
1861 private static ContinuousArrayData getContinuousNonEmptyArrayData(final Object self) {
1862 final ContinuousArrayData data = getContinuousArrayData(self);
1863 if (data != null) {
1864 return data.length() == 0 ? null : data;
1865 }
1866 return null;
1867 }
1868 }
1869
1870 //runtime calls for push and pops. they could be used as guards, but they also perform the runtime logic,
1871 //so rather than synthesizing them into a guard method handle that would also perform the push on the
1872 //retrieved receiver, we use this as runtime logic
1873
1874 //TODO - fold these into the Link logics, but I'll do that as a later step, as I want to do a checkin
1875 //where everything works first
1876
1877 private static final <T> ContinuousArrayData getContinuousNonEmptyArrayDataCCE(final Object self, final Class<T> clazz) {
1878 try {
1879 @SuppressWarnings("unchecked")
1880 final ContinuousArrayData data = (ContinuousArrayData)(T)((NativeArray)self).getArray();
1881 if (data.length() != 0L) {
1882 return data; //if length is 0 we cannot pop and have to relink, because then we'd have to return an undefined, which is a wider type than e.g. int
1883 }
1884 } catch (final NullPointerException e) {
1885 //fallthru
1886 }
1887 throw new ClassCastException();
1888 }
1889
1890 private static final ContinuousArrayData getContinuousArrayDataCCE(final Object self) {
1891 try {
1892 return (ContinuousArrayData)((NativeArray)self).getArray();
1893 } catch (final NullPointerException e) {
1894 throw new ClassCastException();
1895 }
1896 }
1897
1898 private static final ContinuousArrayData getContinuousArrayDataCCE(final Object self, final Class<?> elementType) {
1899 try {
1900 return (ContinuousArrayData)((NativeArray)self).getArray(elementType); //ensure element type can fit "elementType"
1901 } catch (final NullPointerException e) {
1902 throw new ClassCastException();
1903 }
1904 }
1905 }