154       double r = left_point + (right_point - left_point) * pos;  in Percentile()  local
157       if (r < cur_min) r = static_cast<double>(cur_min);  in Percentile()
158       if (r > cur_max) r = static_cast<double>(cur_max);  in Percentile()
159       return r;  in Percentile()
184   std::string r;  in ToString()  local
189   r.append(buf);  in ToString()
193   r.append(buf);  in ToString()
199   r.append(buf);  in ToString()
200   r.append("------------------------------------------------------\n");  in ToString()
201   if (cur_num == 0) return r;   // all buckets are empty  in ToString()
216     r.append(buf);  in ToString()
220     r.append(marks, '#');  in ToString()
221     r.push_back('\n');  in ToString()
223   return r;  in ToString()