def array_from_header(header):
    """Convert header information to array parameters.

    :Parameters:

    header : header_dtype
             Header fields

    :Returns:

    header : dict
             File header
    dtype : dtype
            Data type
    shape : tuple
            Shape of the array
    order : str
            Order of the array
    offset : int
             Header offset
    swap : bool
            Swap byte order
    """
    pass
