On Mon, Jul 4, 2016 at 12:00 PM, Elia Mazzuoli <[email protected]> wrote: > Hi all, I'm trying to access data inside an ArrayBufferView. This is my > simple javascript code: > > const myAddon = require('addon location'); > > const myObj = myAddon.MyObj(); > > const data = Buffer.from('test'); > myObj = doSomething(data); > > After that in my c++ I have this: > > void MyObj::doSomething(const v8::FunctionCallbackInfo<v8::Value> &args) {) > { > > Local<v8::ArrayBufferView> dataBufferView = > Local<v8::ArrayBufferView>::Cast(args[1]); > > std::cout << "Lenght on dataBufferView: " << > dataBufferView->ByteLength() << std::endl; > > std::cout << "Byte offset on dataBufferView: " << > dataBufferView->ByteOffset() << std::endl; > > Local<ArrayBuffer> dataBuffer = dataBufferView->Buffer(); > > std::cout << "Lenght dataBuffer: " << dataBuffer->ByteLength() << > std::endl; > > ArrayBuffer::Contents dataContent = dataBuffer->Externalize(); > > > uint8_t* startData = static_cast<uint8_t*>(dataContent.Data()); > > std::cout << "Content of " <<dataContent.ByteLength() << " from js: "; > > for(unsigned int i = 0; i < dataContent->ByteLength(); i++) { > > std::cout << *(startData + i); > > } > > std::cout << std::endl; > > > } > > > What is strange in this simple code is that dataBuffer->ByteLength() is 8192 > and if I print out the data content what I see is my full javascript code > and some other binary data. > > So.. what is the right way to access data?
node::Buffer::Data() and node::Buffer::Length() from node_buffer.h. Using v8::ArrayBufferView won't work in node.js versions where Buffer is not an instance of Uint8Array. -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
