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40
41 #include <private/qv4iterator_p.h>
42 #include <private/qv4arrayiterator_p.h>
43 #include <private/qv4typedarray_p.h>
44 #include <private/qv4symbol_p.h>
45
46 using namespace QV4;
47
48 DEFINE_OBJECT_VTABLE(ArrayIteratorObject);
49
init(ExecutionEngine * e)50 void ArrayIteratorPrototype::init(ExecutionEngine *e)
51 {
52 defineDefaultProperty(QStringLiteral("next"), method_next, 0);
53
54 Scope scope(e);
55 ScopedString val(scope, e->newString(QLatin1String("Array Iterator")));
56 defineReadonlyConfigurableProperty(e->symbol_toStringTag(), val);
57 }
58
method_next(const FunctionObject * b,const Value * that,const Value *,int)59 ReturnedValue ArrayIteratorPrototype::method_next(const FunctionObject *b, const Value *that, const Value *, int)
60 {
61 Scope scope(b);
62 const ArrayIteratorObject *thisObject = that->as<ArrayIteratorObject>();
63 if (!thisObject)
64 return scope.engine->throwTypeError(QLatin1String("Not an Array Iterator instance"));
65
66 ScopedObject a(scope, thisObject->d()->iteratedObject);
67 if (!a) {
68 QV4::Value undefined = Value::undefinedValue();
69 return IteratorPrototype::createIterResultObject(scope.engine, undefined, true);
70 }
71
72 quint32 index = thisObject->d()->nextIndex;
73 IteratorKind itemKind = thisObject->d()->iterationKind;
74
75 Scoped<TypedArray> ta(scope, a->as<TypedArray>());
76 quint32 len = a->getLength();
77
78 if (index >= len) {
79 thisObject->d()->iteratedObject.set(scope.engine, nullptr);
80 QV4::Value undefined = Value::undefinedValue();
81 return IteratorPrototype::createIterResultObject(scope.engine, undefined, true);
82 }
83
84 thisObject->d()->nextIndex = index + 1;
85 if (itemKind == KeyIteratorKind) {
86 return IteratorPrototype::createIterResultObject(scope.engine, Value::fromInt32(index), false);
87 }
88
89 ReturnedValue elementValue = a->get(index);
90 CHECK_EXCEPTION();
91
92 if (itemKind == ValueIteratorKind) {
93 return IteratorPrototype::createIterResultObject(scope.engine, Value::fromReturnedValue(elementValue), false);
94 } else {
95 Q_ASSERT(itemKind == KeyValueIteratorKind);
96
97 ScopedArrayObject resultArray(scope, scope.engine->newArrayObject());
98 resultArray->arrayReserve(2);
99 resultArray->arrayPut(0, Value::fromInt32(index));
100 resultArray->arrayPut(1, Value::fromReturnedValue(elementValue));
101 resultArray->setArrayLengthUnchecked(2);
102
103 return IteratorPrototype::createIterResultObject(scope.engine, resultArray, false);
104 }
105 }
106
107