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Message from discussion Pass an int to a node.js addon
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Ben Noordhuis  
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 More options Oct 26 2012, 10:16 am
From: Ben Noordhuis <i...@bnoordhuis.nl>
Date: Fri, 26 Oct 2012 16:16:44 +0200
Local: Fri, Oct 26 2012 10:16 am
Subject: Re: [nodejs] Pass an int to a node.js addon
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On Fri, Oct 26, 2012 at 2:00 PM, NodeNinja <aeon6f...@gmail.com> wrote:

>> int length = args[0]->Int32Value();
>> if (length <= 0) {
>>   return ThrowException(Exception::Error(String::New("BAM")));
>> }
>> unsigned char* buffer = new unsigned char[length];

> Thanks for that info Ben,

> Further to that is there a way to pass and return array of pointers I have
> something like (unsigned int **)

Yep. Here is how you accept one:

  if (!args[0]->IsArray()) {
    return ThrowException(Exception::Error(String::New("BAM")));
  }
  Local<Array> array = Local<Array>::Cast(args[0]);
  uint32_t len = array->Length();
  Local<Value> first = array->Get(0);

And this is how you create one:

  Local<Array> array = Array::New(32); // 32=initial length, optional
  array->Set(0, String::New("first"));


 
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