Function fromArrayBuffer

lib/buffer.js:525–552

(obj, byteOffset, length)

}

function fromArrayBuffer(obj, byteOffset, length) {
  // Convert byteOffset to integer
  if (byteOffset === undefined) {
    byteOffset = 0;
  } else {
    byteOffset = +byteOffset;
    if (NumberIsNaN(byteOffset))
      byteOffset = 0;
  }

  const maxLength = obj.byteLength - byteOffset;

  if (maxLength < 0)
    throw new ERR_BUFFER_OUT_OF_BOUNDS('offset');

  if (length !== undefined) {
    // Convert length to non-negative integer.
    length = +length;
    if (length > 0) {
      if (length > maxLength)
        throw new ERR_BUFFER_OUT_OF_BOUNDS('length');
    } else {
      length = 0;
    }
  }

  return new FastBuffer(obj, byteOffset, length);
}

function fromArrayLike(obj) {
  const { length } = obj;