| // 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 <chrono> |
| #include <thread> |
| #include <iomanip> |
| #include <sstream> |
| #include <cstdlib> |
| |
| #include "exprs/timezone_db.h" |
| #include "util/time.h" |
| |
| using namespace impala; |
| using namespace std; |
| |
| void impala::SleepForMs(const int64_t duration_ms) { |
| this_thread::sleep_for(chrono::milliseconds(duration_ms)); |
| } |
| |
| static inline time_t GetSecond(const chrono::system_clock::time_point& t) { |
| return chrono::system_clock::to_time_t(t); |
| } |
| |
| static inline int64_t GetSubSecond(const chrono::system_clock::time_point& t, |
| TimePrecision p) { |
| auto frac = t.time_since_epoch(); |
| if (p == TimePrecision::Millisecond) { |
| auto subsec = chrono::duration_cast<chrono::milliseconds>(frac) % MILLIS_PER_SEC; |
| return subsec.count(); |
| } else if (p == TimePrecision::Microsecond) { |
| auto subsec = chrono::duration_cast<chrono::microseconds>(frac) % MICROS_PER_SEC; |
| return subsec.count(); |
| } else if (p == TimePrecision::Nanosecond) { |
| auto subsec = chrono::duration_cast<chrono::nanoseconds>(frac) % NANOS_PER_SEC; |
| return subsec.count(); |
| } else { |
| return 0; |
| } |
| } |
| |
| // Convert the given 'second' unix timestamp, into a date-time string in the |
| // UTC time zone if 'utc' is true, or the local time zone if it is false. |
| // The returned string is of the form yyy-MM-dd HH::mm::SS. |
| // Note that for time points before the Unix epoch, 'subsecond' might have a negative |
| // value. In this case 'second' has to be adjusted. |
| static string FormatSecond(time_t second, int64_t subsecond, bool utc) { |
| char buf[256]; |
| struct tm tmp; |
| auto input_time = (subsecond < 0) ? second - 1 : second; |
| |
| // gcc 4.9 does not support C++14 get_time and put_time functions, so we're |
| // stuck with strftime() for now. |
| if (utc) { |
| strftime(buf, sizeof(buf), "%F %T", gmtime_r(&input_time, &tmp)); |
| } else { |
| strftime(buf, sizeof(buf), "%F %T", localtime_r(&input_time, &tmp)); |
| } |
| return string(buf); |
| } |
| |
| // Format the sub-second part of a time point, at the precision specified by 'p'. The |
| // returned string is meant to be appended to the string returned by FormatSecond() |
| // above. Note that for time points before the Unix epoch 'subsecond' might have a |
| // negative value. In this case 'subsecond' has to be adjusted based on the precision. |
| static string FormatSubSecond(int64_t subsecond, TimePrecision p) { |
| stringstream ss; |
| if (p == TimePrecision::Millisecond) { |
| if (subsecond < 0) subsecond = 1000 + subsecond; |
| ss << "." << std::setfill('0') << std::setw(3) << subsecond; |
| } else if (p == TimePrecision::Microsecond) { |
| if (subsecond < 0) subsecond = 1000000 + subsecond; |
| ss << "." << std::setfill('0') << std::setw(6) << subsecond; |
| } else if (p == TimePrecision::Nanosecond) { |
| if (subsecond < 0) subsecond = 1000000000 + subsecond; |
| ss << "." << std::setfill('0') << std::setw(9) << subsecond; |
| } else { |
| // 1-second precision or unknown unit. Return empty string. |
| DCHECK_EQ(TimePrecision::Second, p); |
| ss << ""; |
| } |
| return ss.str(); |
| } |
| |
| // Convert time point 't' into date-time string at precision 'p'. |
| // Output string is in UTC time zone if 'utc' is true, else it is in the |
| // local time zone. |
| static string ToString(const chrono::system_clock::time_point& t, TimePrecision p, |
| bool utc) { |
| stringstream ss; |
| time_t second = GetSecond(t); |
| int64_t subsecond = GetSubSecond(t, p); |
| ss << FormatSecond(second, subsecond, utc); |
| ss << FormatSubSecond(subsecond, p); |
| return ss.str(); |
| } |
| |
| // Convenience function to convert Unix time, specified as seconds since |
| // the Unix epoch, into a C++ time_point object. |
| static chrono::system_clock::time_point TimepointFromUnix(int64_t s) { |
| return chrono::system_clock::time_point(chrono::seconds(s)); |
| } |
| |
| // Convenience function to convert Unix time, specified as milliseconds since |
| // the Unix epoch, into a C++ time_point object. |
| static chrono::system_clock::time_point TimepointFromUnixMillis(int64_t ms) { |
| return chrono::system_clock::time_point(chrono::milliseconds(ms)); |
| } |
| |
| // Convenience function to convert Unix time, specified as microseconds since |
| // the Unix epoch, into a C++ time_point object. |
| static chrono::system_clock::time_point TimepointFromUnixMicros(int64_t us) { |
| return chrono::system_clock::time_point(chrono::microseconds(us)); |
| } |
| |
| string impala::ToStringFromUnix(int64_t s, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnix(s); |
| return ToString(t, p, false); |
| } |
| |
| string impala::ToUtcStringFromUnix(int64_t s, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnix(s); |
| return ToString(t, p, true); |
| } |
| |
| string impala::ToStringFromUnixMillis(int64_t ms, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnixMillis(ms); |
| return ToString(t, p, false); |
| } |
| |
| string impala::ToUtcStringFromUnixMillis(int64_t ms, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnixMillis(ms); |
| return ToString(t, p, true); |
| } |
| |
| string impala::ToStringFromUnixMicros(int64_t us, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnixMicros(us); |
| return ToString(t, p, false); |
| } |
| |
| string impala::ToUtcStringFromUnixMicros(int64_t us, TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnixMicros(us); |
| return ToString(t, p, true); |
| } |
| |
| string impala::ToStringFromUnixMicros(int64_t us, const Timezone& tz, |
| TimePrecision p) { |
| chrono::system_clock::time_point t = TimepointFromUnixMicros(us); |
| const char* fmt; |
| switch (p) { |
| case TimePrecision::Millisecond: |
| fmt = "%Y-%m-%d %H:%M:%E3S"; |
| break; |
| case TimePrecision::Microsecond: |
| fmt = "%Y-%m-%d %H:%M:%E6S"; |
| break; |
| case TimePrecision::Nanosecond: |
| fmt = "%Y-%m-%d %H:%M:%E9S"; |
| break; |
| default: |
| fmt = "%Y-%m-%d %H:%M:%S"; |
| } |
| return cctz::format(fmt, t, tz); |
| } |