void LibRaw:: recycle_datastream() 
{
  if(libraw_internal_data.internal_data.input && libraw_internal_data.internal_data.input_internal) 
    { 
      delete libraw_internal_data.internal_data.input; 
      libraw_internal_data.internal_data.input = NULL;
    }
  libraw_internal_data.internal_data.input_internal = 0;
}
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