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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/builtins/builtins-utils.h" | 5 #include "src/builtins/builtins-utils.h" |
6 #include "src/builtins/builtins.h" | 6 #include "src/builtins/builtins.h" |
7 #include "src/counters.h" | 7 #include "src/counters.h" |
8 #include "src/elements.h" | 8 #include "src/elements.h" |
9 #include "src/objects-inl.h" | 9 #include "src/objects-inl.h" |
10 | 10 |
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34 // +Infinity / -Infinity | 34 // +Infinity / -Infinity |
35 DCHECK(!std::isnan(fp)); | 35 DCHECK(!std::isnan(fp)); |
36 return fp < 0 ? minimum : maximum; | 36 return fp < 0 ? minimum : maximum; |
37 } | 37 } |
38 relative = static_cast<int64_t>(fp); | 38 relative = static_cast<int64_t>(fp); |
39 } | 39 } |
40 return relative < 0 ? std::max<int64_t>(relative + maximum, minimum) | 40 return relative < 0 ? std::max<int64_t>(relative + maximum, minimum) |
41 : std::min<int64_t>(relative, maximum); | 41 : std::min<int64_t>(relative, maximum); |
42 } | 42 } |
43 | 43 |
44 // ES7 section 22.2.4.6 TypedArrayCreate ( constructor, argumentList ) | |
45 MaybeHandle<JSTypedArray> TypedArrayCreate(Isolate* isolate, | |
46 Handle<JSFunction> default_ctor, | |
47 int argc, Handle<Object>* argv, | |
48 const char* method_name) { | |
49 // 1. Let newTypedArray be ? Construct(constructor, argumentList). | |
50 Handle<Object> new_obj; | |
51 ASSIGN_RETURN_ON_EXCEPTION( | |
52 isolate, new_obj, Execution::New(default_ctor, argc, argv), JSTypedArray); | |
53 | |
54 // 2. Perform ? ValidateTypedArray(newTypedArray). | |
55 Handle<JSTypedArray> new_array; | |
56 ASSIGN_RETURN_ON_EXCEPTION( | |
57 isolate, new_array, JSTypedArray::Validate(isolate, new_obj, method_name), | |
58 JSTypedArray); | |
59 | |
60 // 3. If argumentList is a List of a single Number, then | |
61 // If newTypedArray.[[ArrayLength]] < size, throw a TypeError exception. | |
62 DCHECK(argc > 1 || argv[0]->IsSmi()); | |
Camillo Bruni
2017/03/27 08:59:01
DCHECK_IMPLIES(argc == 1, argv[0]->IsSmi());
Choongwoo Han
2017/03/27 12:36:33
Done.
| |
63 if (argc == 1 && new_array->length_value() < argv[0]->Number()) { | |
64 const MessageTemplate::Template message = | |
65 MessageTemplate::kTypedArrayTooShort; | |
66 THROW_NEW_ERROR(isolate, NewTypeError(message), JSTypedArray); | |
67 } | |
68 | |
69 // 4. Return newTypedArray. | |
70 return new_array; | |
71 } | |
72 | |
73 // ES7 section 22.2.4.7 TypedArraySpeciesCreate ( exemplar, argumentList ) | |
74 MaybeHandle<JSTypedArray> TypedArraySpeciesCreate(Isolate* isolate, | |
75 Handle<JSTypedArray> exemplar, | |
76 int argc, | |
77 Handle<Object>* argv, | |
78 const char* method_name) { | |
79 // 1. Assert: exemplar is an Object that has a [[TypedArrayName]] internal | |
80 // slot. | |
81 DCHECK(exemplar->IsJSTypedArray()); | |
82 | |
83 // 2. Let defaultConstructor be the intrinsic object listed in column one of | |
84 // Table 51 for exemplar.[[TypedArrayName]]. | |
85 Handle<JSFunction> default_ctor = isolate->uint8_array_fun(); | |
86 switch (exemplar->type()) { | |
87 #define TYPED_ARRAY_CTOR(Type, type, TYPE, ctype, size) \ | |
88 case kExternal##Type##Array: { \ | |
89 default_ctor = isolate->type##_array_fun(); \ | |
90 break; \ | |
91 } | |
92 | |
93 TYPED_ARRAYS(TYPED_ARRAY_CTOR) | |
94 #undef TYPED_ARRAY_CTOR | |
95 default: | |
96 UNREACHABLE(); | |
97 } | |
98 | |
99 // 3. Let constructor be ? SpeciesConstructor(exemplar, defaultConstructor). | |
100 Handle<Object> ctor; | |
101 ASSIGN_RETURN_ON_EXCEPTION( | |
102 isolate, ctor, | |
103 Object::SpeciesConstructor(isolate, exemplar, default_ctor), | |
104 JSTypedArray); | |
105 | |
106 // 4. Return ? TypedArrayCreate(constructor, argumentList). | |
107 return TypedArrayCreate(isolate, Handle<JSFunction>::cast(ctor), argc, argv, | |
108 method_name); | |
109 } | |
110 | |
111 MaybeHandle<JSTypedArray> TypedArraySpeciesCreateByLength( | |
112 Isolate* isolate, Handle<JSTypedArray> exemplar, const char* method_name, | |
113 int64_t length) { | |
114 const int argc = 1; | |
115 ScopedVector<Handle<Object>> argv(argc); | |
116 argv[0] = isolate->factory()->NewNumberFromInt64(length); | |
117 return TypedArraySpeciesCreate(isolate, exemplar, argc, argv.start(), | |
118 method_name); | |
119 } | |
120 | |
44 } // namespace | 121 } // namespace |
45 | 122 |
46 BUILTIN(TypedArrayPrototypeCopyWithin) { | 123 BUILTIN(TypedArrayPrototypeCopyWithin) { |
47 HandleScope scope(isolate); | 124 HandleScope scope(isolate); |
48 | 125 |
49 Handle<JSTypedArray> array; | 126 Handle<JSTypedArray> array; |
50 const char* method = "%TypedArray%.prototype.copyWithin"; | 127 const char* method = "%TypedArray%.prototype.copyWithin"; |
51 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | 128 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
52 isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method)); | 129 isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method)); |
53 | 130 |
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263 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | 340 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
264 isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method)); | 341 isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method)); |
265 | 342 |
266 if (V8_UNLIKELY(array->WasNeutered())) return *array; | 343 if (V8_UNLIKELY(array->WasNeutered())) return *array; |
267 | 344 |
268 ElementsAccessor* elements = array->GetElementsAccessor(); | 345 ElementsAccessor* elements = array->GetElementsAccessor(); |
269 elements->Reverse(*array); | 346 elements->Reverse(*array); |
270 return *array; | 347 return *array; |
271 } | 348 } |
272 | 349 |
350 BUILTIN(TypedArrayPrototypeSlice) { | |
351 HandleScope scope(isolate); | |
352 | |
353 Handle<JSTypedArray> array; | |
354 const char* method = "%TypedArray%.prototype.slice"; | |
355 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | |
356 isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method)); | |
357 | |
358 int64_t len = array->length_value(); | |
359 int64_t start = 0; | |
360 int64_t end = len; | |
361 { | |
362 Handle<Object> num = args.atOrUndefined(isolate, 1); | |
363 if (!num->IsUndefined(isolate)) { | |
364 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, num, | |
365 Object::ToInteger(isolate, num)); | |
366 start = CapRelativeIndex(num, 0, len); | |
367 | |
368 num = args.atOrUndefined(isolate, 2); | |
369 if (!num->IsUndefined(isolate)) { | |
370 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, num, | |
371 Object::ToInteger(isolate, num)); | |
372 end = CapRelativeIndex(num, 0, len); | |
373 } | |
374 } | |
375 } | |
376 | |
377 int64_t count = std::max<int64_t>(end - start, 0); | |
378 | |
379 Handle<JSTypedArray> result_array; | |
380 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | |
381 isolate, result_array, | |
382 TypedArraySpeciesCreateByLength(isolate, array, method, count)); | |
383 | |
384 // TODO(cwhan.tunz): neutering check of the result_array should be done in | |
385 // TypedArraySpeciesCreate, but currently ValidateTypedArray does not throw | |
386 // for neutered buffer, so this is a temporary neutering check for the result | |
387 // array | |
388 if (V8_UNLIKELY(result_array->WasNeutered())) return *result_array; | |
389 | |
390 // TODO(cwhan.tunz): should throw. | |
391 if (V8_UNLIKELY(array->WasNeutered())) return *result_array; | |
392 | |
393 if (count == 0) return *result_array; | |
394 | |
395 ElementsAccessor* accessor = array->GetElementsAccessor(); | |
396 return *accessor->Slice(array, static_cast<uint32_t>(start), | |
397 static_cast<uint32_t>(end), result_array); | |
398 } | |
399 | |
273 } // namespace internal | 400 } // namespace internal |
274 } // namespace v8 | 401 } // namespace v8 |
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