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| ** Alternatively, this file may be used under the terms of the GNU |
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| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| #include "qv4arraybuffer_p.h" |
| #include "qv4typedarray_p.h" |
| #include "qv4dataview_p.h" |
| #include "qv4string_p.h" |
| #include "qv4jscall_p.h" |
| #include "qv4symbol_p.h" |
| |
| using namespace QV4; |
| |
| DEFINE_OBJECT_VTABLE(SharedArrayBufferCtor); |
| DEFINE_OBJECT_VTABLE(ArrayBufferCtor); |
| DEFINE_OBJECT_VTABLE(SharedArrayBuffer); |
| DEFINE_OBJECT_VTABLE(ArrayBuffer); |
| |
| void Heap::SharedArrayBufferCtor::init(QV4::ExecutionContext *scope) |
| { |
| Heap::FunctionObject::init(scope, QStringLiteral("SharedArrayBuffer")); |
| } |
| |
| void Heap::ArrayBufferCtor::init(QV4::ExecutionContext *scope) |
| { |
| Heap::FunctionObject::init(scope, QStringLiteral("ArrayBuffer")); |
| } |
| |
| ReturnedValue SharedArrayBufferCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget) |
| { |
| Scope scope(f); |
| if (newTarget->isUndefined()) |
| return scope.engine->throwTypeError(); |
| |
| qint64 len = argc ? argv[0].toIndex() : 0; |
| if (scope.engine->hasException) |
| return Encode::undefined(); |
| if (len < 0 || len >= INT_MAX) |
| return scope.engine->throwRangeError(QStringLiteral("SharedArrayBuffer: Invalid length.")); |
| |
| Scoped<SharedArrayBuffer> a(scope, scope.engine->memoryManager->allocate<SharedArrayBuffer>(len)); |
| if (scope.engine->hasException) |
| return Encode::undefined(); |
| |
| return a->asReturnedValue(); |
| } |
| |
| ReturnedValue SharedArrayBufferCtor::virtualCall(const FunctionObject *f, const Value *, const Value *, int) |
| { |
| return f->engine()->throwTypeError(); |
| } |
| |
| |
| ReturnedValue ArrayBufferCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget) |
| { |
| ExecutionEngine *v4 = f->engine(); |
| Scope scope(v4); |
| |
| ScopedValue l(scope, argc ? argv[0] : Value::undefinedValue()); |
| double dl = l->toInteger(); |
| if (v4->hasException) |
| return Encode::undefined(); |
| uint len = (uint)qBound(0., dl, (double)UINT_MAX); |
| if (len != dl) |
| return v4->throwRangeError(QLatin1String("ArrayBuffer constructor: invalid length")); |
| |
| Scoped<ArrayBuffer> a(scope, v4->newArrayBuffer(len)); |
| if (newTarget->heapObject() != f->heapObject() && newTarget->isFunctionObject()) { |
| const FunctionObject *nt = static_cast<const FunctionObject *>(newTarget); |
| ScopedObject o(scope, nt->protoProperty()); |
| if (o) |
| a->setPrototypeOf(o); |
| } |
| if (scope.engine->hasException) |
| return Encode::undefined(); |
| |
| return a->asReturnedValue(); |
| } |
| |
| ReturnedValue ArrayBufferCtor::method_isView(const FunctionObject *, const Value *, const Value *argv, int argc) |
| { |
| if (argc < 1) |
| return Encode(false); |
| |
| if (argv[0].as<TypedArray>() || |
| argv[0].as<DataView>()) |
| return Encode(true); |
| |
| return Encode(false); |
| } |
| |
| |
| void Heap::SharedArrayBuffer::init(size_t length) |
| { |
| Object::init(); |
| if (length < UINT_MAX) |
| data = QTypedArrayData<char>::allocate(length + 1); |
| if (!data) { |
| internalClass->engine->throwRangeError(QStringLiteral("ArrayBuffer: out of memory")); |
| return; |
| } |
| data->size = int(length); |
| memset(data->data(), 0, length + 1); |
| isShared = true; |
| } |
| |
| void Heap::SharedArrayBuffer::init(const QByteArray& array) |
| { |
| Object::init(); |
| data = const_cast<QByteArray&>(array).data_ptr(); |
| data->ref.ref(); |
| isShared = true; |
| } |
| |
| void Heap::SharedArrayBuffer::destroy() |
| { |
| if (data && !data->ref.deref()) |
| QTypedArrayData<char>::deallocate(data); |
| Object::destroy(); |
| } |
| |
| QByteArray ArrayBuffer::asByteArray() const |
| { |
| QByteArrayDataPtr ba = { d()->data }; |
| ba.ptr->ref.ref(); |
| return QByteArray(ba); |
| } |
| |
| void ArrayBuffer::detach() { |
| if (!d()->data->ref.isShared()) |
| return; |
| |
| QTypedArrayData<char> *oldData = d()->data; |
| |
| d()->data = QTypedArrayData<char>::allocate(oldData->size + 1); |
| if (!d()->data) { |
| engine()->throwRangeError(QStringLiteral("ArrayBuffer: out of memory")); |
| return; |
| } |
| |
| memcpy(d()->data->data(), oldData->data(), oldData->size + 1); |
| |
| if (!oldData->ref.deref()) |
| QTypedArrayData<char>::deallocate(oldData); |
| } |
| |
| |
| void SharedArrayBufferPrototype::init(ExecutionEngine *engine, Object *ctor) |
| { |
| Scope scope(engine); |
| ScopedObject o(scope); |
| ctor->defineReadonlyConfigurableProperty(engine->id_length(), Value::fromInt32(1)); |
| ctor->defineReadonlyProperty(engine->id_prototype(), (o = this)); |
| ctor->addSymbolSpecies(); |
| |
| defineDefaultProperty(engine->id_constructor(), (o = ctor)); |
| defineAccessorProperty(QStringLiteral("byteLength"), method_get_byteLength, nullptr); |
| defineDefaultProperty(QStringLiteral("slice"), method_slice, 2); |
| ScopedString name(scope, engine->newString(QStringLiteral("SharedArrayBuffer"))); |
| defineReadonlyConfigurableProperty(scope.engine->symbol_toStringTag(), name); |
| } |
| |
| ReturnedValue SharedArrayBufferPrototype::method_get_byteLength(const FunctionObject *b, const Value *thisObject, const Value *, int) |
| { |
| const SharedArrayBuffer *a = thisObject->as<SharedArrayBuffer>(); |
| if (!a || a->isDetachedBuffer() || !a->isSharedArrayBuffer()) |
| return b->engine()->throwTypeError(); |
| |
| return Encode(a->d()->data->size); |
| } |
| |
| ReturnedValue SharedArrayBufferPrototype::method_slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc) |
| { |
| return slice(b, thisObject, argv, argc, true); |
| } |
| |
| ReturnedValue SharedArrayBufferPrototype::slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc, bool shared) |
| { |
| Scope scope(b); |
| const SharedArrayBuffer *a = thisObject->as<SharedArrayBuffer>(); |
| if (!a || a->isDetachedBuffer() || (a->isSharedArrayBuffer() != shared)) |
| return scope.engine->throwTypeError(); |
| |
| double start = argc > 0 ? argv[0].toInteger() : 0; |
| double end = (argc < 2 || argv[1].isUndefined()) ? |
| a->d()->data->size : argv[1].toInteger(); |
| if (scope.hasException()) |
| return QV4::Encode::undefined(); |
| |
| double first = (start < 0) ? qMax(a->d()->data->size + start, 0.) : qMin(start, (double)a->d()->data->size); |
| double final = (end < 0) ? qMax(a->d()->data->size + end, 0.) : qMin(end, (double)a->d()->data->size); |
| |
| const FunctionObject *constructor = a->speciesConstructor(scope, shared ? scope.engine->sharedArrayBufferCtor() : scope.engine->arrayBufferCtor()); |
| if (!constructor) |
| return scope.engine->throwTypeError(); |
| |
| double newLen = qMax(final - first, 0.); |
| ScopedValue argument(scope, QV4::Encode(newLen)); |
| QV4::Scoped<SharedArrayBuffer> newBuffer(scope, constructor->callAsConstructor(argument, 1)); |
| if (!newBuffer || newBuffer->d()->data->size < (int)newLen || |
| newBuffer->isDetachedBuffer() || (newBuffer->isSharedArrayBuffer() != shared) || |
| newBuffer->sameValue(*a) || |
| a->isDetachedBuffer()) |
| return scope.engine->throwTypeError(); |
| |
| memcpy(newBuffer->d()->data->data(), a->d()->data->data() + (uint)first, newLen); |
| return newBuffer->asReturnedValue(); |
| } |
| |
| |
| void ArrayBufferPrototype::init(ExecutionEngine *engine, Object *ctor) |
| { |
| Scope scope(engine); |
| ScopedObject o(scope); |
| ctor->defineReadonlyConfigurableProperty(engine->id_length(), Value::fromInt32(1)); |
| ctor->defineReadonlyProperty(engine->id_prototype(), (o = this)); |
| ctor->defineDefaultProperty(QStringLiteral("isView"), ArrayBufferCtor::method_isView, 1); |
| ctor->addSymbolSpecies(); |
| |
| defineDefaultProperty(engine->id_constructor(), (o = ctor)); |
| defineAccessorProperty(QStringLiteral("byteLength"), method_get_byteLength, nullptr); |
| defineDefaultProperty(QStringLiteral("slice"), method_slice, 2); |
| defineDefaultProperty(QStringLiteral("toString"), method_toString, 0); |
| ScopedString name(scope, engine->newString(QStringLiteral("ArrayBuffer"))); |
| defineReadonlyConfigurableProperty(scope.engine->symbol_toStringTag(), name); |
| } |
| |
| ReturnedValue ArrayBufferPrototype::method_get_byteLength(const FunctionObject *f, const Value *thisObject, const Value *, int) |
| { |
| const ArrayBuffer *a = thisObject->as<ArrayBuffer>(); |
| if (!a || a->isDetachedBuffer() || a->isSharedArrayBuffer()) |
| return f->engine()->throwTypeError(); |
| |
| return Encode(a->d()->data->size); |
| } |
| |
| ReturnedValue ArrayBufferPrototype::method_slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc) |
| { |
| return slice(b, thisObject, argv, argc, false); |
| } |
| |
| ReturnedValue ArrayBufferPrototype::method_toString(const FunctionObject *b, const Value *thisObject, const Value *, int) |
| { |
| ExecutionEngine *v4 = b->engine(); |
| const ArrayBuffer *a = thisObject->as<ArrayBuffer>(); |
| if (!a) |
| RETURN_UNDEFINED(); |
| return Encode(v4->newString(QString::fromUtf8(a->asByteArray()))); |
| } |