C++ (Cpp) DataView::GetArrayBuffer示例

    Var DataView::EntryGetterByteOffset(RecyclableObject* function, CallInfo callInfo, ...)
    {
        PROBE_STACK(function->GetScriptContext(), Js::Constants::MinStackDefault);

        ARGUMENTS(args, callInfo);
        ScriptContext* scriptContext = function->GetScriptContext();

        Assert(!(callInfo.Flags & CallFlags_New));

        if (args.Info.Count == 0 || !DataView::Is(args[0]))
        {
            JavascriptError::ThrowTypeError(scriptContext, JSERR_This_NeedDataView);
        }

        DataView* dataView = DataView::FromVar(args[0]);
        ArrayBuffer* arrayBuffer = dataView->GetArrayBuffer();

        if (arrayBuffer == nullptr)
        {
            JavascriptError::ThrowTypeError(scriptContext, JSERR_NeedArrayBufferObject);
        }
        else if (arrayBuffer->IsDetached())
        {
            return TaggedInt::ToVarUnchecked(0);
        }

        return JavascriptNumber::ToVar(dataView->GetByteOffset(), scriptContext);
    }