Data extension for initialization with Data

DataStreamExt.swift

extension Data {
  init(reading input: InputStream) {
    self.init()
    input.open()
    
    let bufferSize = 1024
    let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: bufferSize)
    
    while input.hasBytesAvailable {
      let read = input.read(buffer, maxLength: bufferSize)
      self.append(buffer, count: read)
//      if (read == 0){ break}
    }
    
    buffer.deallocate(capacity: bufferSize)
    
    input.close()
  }
  
}