import { memcpy, Type } from "."

export function ConstDataView(size) {
  const obj = { _size: size }
  Object.setPrototypeOf(obj, ConstDataView.prototype)
  obj.new(ConstDataView, arguments)
  return obj
}
ConstDataView.prototype.serialize = function(dv, src) {
  if (dv.byteLength < this._size) {
    throw new Error('too small buffer')
  }
  memcpy(dv, src)
  return
}
ConstDataView.prototype.parse = function(dv) {
  const res_buffer = new ArrayBuffer(this._size)
  const res_dv = new DataView(res_buffer)

  memcpy(res_dv, dv)

  return res_dv
}
ConstDataView.prototype.isHeadless = function() {
  return false
}
ConstDataView.prototype.sizeof = function() {
  return this._size
}
Object.setPrototypeOf(ConstDataView.prototype, Type.prototype)
Object.freeze(ConstDataView.prototype)