Re: [v8-users] ArrayBuffer size is 0

[Simon Zünd]

Hey,

You are not accessing the "size" property, but treat "args[0]" as if it were a number (which it is not, it's a ArrayBuffer). Since you have established that args[0] is an ArrayBuffer, you can use cast, which would look roughly like this:

Local<ArrayBuffer> array_buffer = Local<ArrayBuffer>::cast(args[0]);

size_t size = array_buffer->ByteLength();

On Mon, Sep 2, 2019 at 12:50 AM Jonathan Doster <jbdo...@gmail.com> wrote:

Hey everyone!

I am trying to pass an ArrayBuffer from JS to C++, and when I debug the "size" variable is 0. 

I do not understand what I am doing wrong, ultimately my goal is to be able to read and write the buffer, copy, etc.

Thank you!!

var api = require('../src/public/api')

api.Method(new ArrayBuffer([1, 2, 3, 4]))

void Method(const v8::FunctionCallbackInfo<v8::Value> &args)

{

CHECK_ARGS(args, args[0]->IsArrayBuffer());

uint32_t size = args[0]->Uint32Value();

}

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[Jonathan Doster]

Simon,

Thank you so much for your answer!

That makes perfect sense

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Jonathan Doster 909.839.3432 Jbdo...@gmail.com Please disregard any spelling errors, this message was sent via mobile.