Function calcLengthLength

map-chat/javascript/browserMqtt.js:1901–1913

* calcLengthLength - calculate the length of the remaining * length field * * @api private

(length)

 * @api private
 */
function calcLengthLength(length) {
  if (length >= 0 && length < 128) {
    return 1
  } else if (length >= 128 && length < 16384) {
    return 2
  } else if (length >= 16384 && length < 2097152) {
    return 3
  } else if (length >= 2097152 && length < 268435456) {
    return 4
  } else {
    return 0
  }
}

/**
 * writeLength - write an MQTT style length field to the buffer