156         if (start_idx.first && start_idx.second == UINT64_MAX) {  in DoExecute()
158             start_idx.second = history.GetSize() - count.second;  in DoExecute()
159             stop_idx.second = history.GetSize() - 1;  in DoExecute()
161             start_idx.second = stop_idx.second;  in DoExecute()
162             stop_idx.second = history.GetSize() - 1;  in DoExecute()
164             start_idx.second = 0;  in DoExecute()
165             stop_idx.second = history.GetSize() - 1;  in DoExecute()
169             start_idx.second = 0;  in DoExecute()
170             stop_idx.second = history.GetSize() - 1;  in DoExecute()
173               stop_idx.second = start_idx.second + count.second - 1;  in DoExecute()
175               stop_idx.second = history.GetSize() - 1;  in DoExecute()
179               if (stop_idx.second >= count.second)  in DoExecute()
180                 start_idx.second = stop_idx.second - count.second + 1;  in DoExecute()
182                 start_idx.second = 0;  in DoExecute()
186             start_idx.second = 0;  in DoExecute()
187             stop_idx.second = count.second - 1;  in DoExecute()
190         history.Dump(result.GetOutputStream(), start_idx.second,  in DoExecute()
191                      stop_idx.second);  in DoExecute()