lib/e131/packet.js
function Packet(arg) {
  if (this instanceof Packet === false) {
    return new Packet(arg);
  }

  if (arg === undefined) {
    throw new TypeError('arg should be a Buffer object or a number of slots');
  }

  if (Buffer.isBuffer(arg)) { // initialize from a buffer
    if (arg.length < 126) {
      throw new RangeError('buffer size should be of at least 126 bytes');
    }
    this._buffer = arg;
  }
  else if (Number.isInteger(arg)) { // initialize using number of slots
    if (arg < 1 || arg > 512) {
      throw new RangeError("number of slots should be in the range [1-512]");
    }
    this._buffer = Buffer.alloc(126 + arg);
  }

  this._rootLayer = new RootLayer(this._buffer.slice(0, 38));
  this._frameLayer = new FrameLayer(this._buffer.slice(38, 115));
  this._dmpLayer = new DMPLayer(this._buffer.slice(115));

  if (Number.isInteger(arg)) {
    this.init(arg);
  }
}
function Packet(arg) {
  if (this instanceof Packet === false) {
    return new Packet(arg);
  }

  if (arg === undefined) {
    throw new TypeError('arg should be a Buffer object or a number of slots');
  }

  if (Buffer.isBuffer(arg)) { // initialize from a buffer
    if (arg.length < 126) {
      throw new RangeError('buffer size should be of at least 126 bytes');
    }
    this._buffer = arg;
  }
  else if (Number.isInteger(arg)) { // initialize using number of slots
    if (arg < 1 || arg > 512) {
      throw new RangeError("number of slots should be in the range [1-512]");
    }
    this._buffer = Buffer.alloc(126 + arg);
  }

  this._rootLayer = new RootLayer(this._buffer.slice(0, 38));
  this._frameLayer = new FrameLayer(this._buffer.slice(38, 115));
  this._dmpLayer = new DMPLayer(this._buffer.slice(115));

  if (Number.isInteger(arg)) {
    this.init(arg);
  }
}
function Packet ( arg ) { if ( this instanceof Packet === false ) { return new Packet ( arg ) ; } if ( arg === undefined ) { throw new TypeError ( 'arg should be a Buffer object or a number of slots' ) ; } if ( Buffer . isBuffer ( arg ) ) { // initialize from a buffer if ( arg . length < 126 ) { throw new RangeError ( 'buffer size should be of at least 126 bytes' ) ; } this . _buffer = arg ; } else if ( Number . isInteger ( arg ) ) { // initialize using number of slots if ( arg < 1 || arg > 512 ) { throw new RangeError ( "number of slots should be in the range [1-512]" ) ; } this . _buffer = Buffer . alloc ( 126 + arg ) ; } this . _rootLayer = new RootLayer ( this . _buffer . slice ( 0 , 38 ) ) ; this . _frameLayer = new FrameLayer ( this . _buffer . slice ( 38 , 115 ) ) ; this . _dmpLayer = new DMPLayer ( this . _buffer . slice ( 115 ) ) ; if ( Number . isInteger ( arg ) ) { this . init ( arg ) ; } }
packet object constructor
packet object constructor