| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "runtime/multi-precision.h" |
| |
| #include "common/logging.h" |
| |
| #include "common/names.h" |
| |
| namespace impala { |
| |
| static const uint32_t ONE_BILLION = 1000000000; |
| |
| // Print the value in base 10 by converting v into parts that are base |
| // 1 billion (large multiple of 10 that's easy to work with). |
| ostream& operator<<(ostream& os, const int128_t& val) { |
| int128_t v = val; |
| if (v == 0) { |
| os << "0"; |
| return os; |
| } |
| |
| if (v < 0) { |
| v = -v; |
| os << "-"; |
| } |
| |
| // 1B^5 covers the range for int128_t |
| // parts[0] is the least significant place. |
| uint32_t parts[5]; |
| int index = 0; |
| while (v > 0) { |
| parts[index++] = v % ONE_BILLION; |
| v /= ONE_BILLION; |
| } |
| --index; |
| |
| // Accumulate into a temporary stringstream so format options on 'os' do |
| // not mess up printing val. |
| // TODO: This is likely pretty expensive with the string copies. We don't |
| // do this in paths we care about currently but might need to revisit. |
| stringstream ss; |
| ss << parts[index]; |
| for (int i = index - 1; i >= 0; --i) { |
| // The remaining parts need to be padded with leading zeros. |
| ss << setfill('0') << setw(9) << parts[i]; |
| } |
| os << ss.str(); |
| return os; |
| } |
| |
| } |