'Generate an |_IfdEntry| instance corresponding to each entry in the
directory.'

def iter_entries(self):

    for idx in range(self._entry_count):
        dir_entry_offset = ((self._offset + 2) + (idx * 12))
        ifd_entry = _IfdEntryFactory(self._stream_rdr, dir_entry_offset)
        (yield ifd_entry)
