155         if (start_idx.first && start_idx.second == UINT64_MAX) {  in DoExecute()
157             start_idx.second = history.GetSize() - count.second;  in DoExecute()
158             stop_idx.second = history.GetSize() - 1;  in DoExecute()
160             start_idx.second = stop_idx.second;  in DoExecute()
161             stop_idx.second = history.GetSize() - 1;  in DoExecute()
163             start_idx.second = 0;  in DoExecute()
164             stop_idx.second = history.GetSize() - 1;  in DoExecute()
168             start_idx.second = 0;  in DoExecute()
169             stop_idx.second = history.GetSize() - 1;  in DoExecute()
172               stop_idx.second = start_idx.second + count.second - 1;  in DoExecute()
174               stop_idx.second = history.GetSize() - 1;  in DoExecute()
178               if (stop_idx.second >= count.second)  in DoExecute()
179                 start_idx.second = stop_idx.second - count.second + 1;  in DoExecute()
181                 start_idx.second = 0;  in DoExecute()
185             start_idx.second = 0;  in DoExecute()
186             stop_idx.second = count.second - 1;  in DoExecute()
189         history.Dump(result.GetOutputStream(), start_idx.second,  in DoExecute()
190                      stop_idx.second);  in DoExecute()