return;
    }
    if (*offset == 0) {
      if (!outfile->truncate()) {
        TF_SetStatus(status, TF_INTERNAL,
                     "Could not truncate internal temporary file.");
        return;
      }
      *offset = static_cast<int64_t>(metadata->size());
    }
    outfile->clear();
    outfile->seekp(0, std::ios::end);
    TF_SetStatus(status, TF_OK, "");
  } else {