CODEWITHSUNDEEP
node.jsmeteorbuffer
Michael
Michael

Reputation: 31

Buffer.swap16 is not a function

I've tested some buffer swap function in NodeJS, but in my Meteor project it doesn't work.

Can somebody tell me the reason?

Nodejs:

var CRC = new Buffer([0x20,0x40]);
console.log(CRC.swap16());   //  OUTPUT:  <Buffer 40 20>

Meteor.js

var CRC = new Buffer([0x20,0x40]);
console.log(CRC.swap16());   //  OUTPUT:  TypeError: CRC.swap16 is not a function

Can somebody help me please. In know it's maybe a version problem. but i can't solve it at the moment.

Is there also a way to get this thing running with meteor?

Upvotes: 1

Views: 291

Answers (1)

Styx
Styx

Reputation: 10076

Buffer.swap16() method has been added in 5.10.0, whereas Meteor uses NodeJS version 4.

You can copy this method implementation from the NodeJS source, it is quite simple (with small modifications):

function swap(b, n, m) {
  const i = b[n];
  b[n] = b[m];
  b[m] = i;
}

Buffer.prototype.swap16 = function swap16() {
  const len = this.length;
  if (len % 2 !== 0) {
    throw new RangeError('ERR_INVALID_BUFFER_SIZE', '16-bits');
  }
  for (var i = 0; i < len; i += 2) {
    swap(this, i, i + 1);
  }
  return this;
};

Upvotes: 1

Related Questions