2020-01-18 08:38:21 +00:00
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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2019-05-18 00:00:01 +00:00
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#pragma once
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2020-12-27 22:38:32 +00:00
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#include <AK/Platform.h>
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2019-05-18 00:00:01 +00:00
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namespace AK {
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2020-08-26 00:32:32 +00:00
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// Month and day start at 1. Month must be >= 1 and <= 12.
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// The return value is 0-indexed, that is 0 is Sunday, 1 is Monday, etc.
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// Day may be negative or larger than the number of days
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// in the given month.
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unsigned day_of_week(int year, unsigned month, int day);
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2020-08-25 23:19:16 +00:00
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// Month and day start at 1. Month must be >= 1 and <= 12.
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// The return value is 0-indexed, that is Jan 1 is day 0.
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// Day may be negative or larger than the number of days
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// in the given month. If day is negative enough, the result
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// can be negative.
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int day_of_year(int year, unsigned month, int day);
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2020-08-26 00:11:12 +00:00
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// Month starts at 1. Month must be >= 1 and <= 12.
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int days_in_month(int year, unsigned month);
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2020-08-25 20:38:24 +00:00
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inline bool is_leap_year(int year)
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{
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return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0);
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}
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2020-08-26 00:17:19 +00:00
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inline unsigned days_in_year(int year)
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{
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return 365 + is_leap_year(year);
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}
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2020-08-25 20:53:36 +00:00
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inline int years_to_days_since_epoch(int year)
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{
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int days = 0;
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for (int current_year = 1970; current_year < year; ++current_year)
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2020-08-26 00:17:19 +00:00
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days += days_in_year(current_year);
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2020-08-25 20:53:36 +00:00
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for (int current_year = year; current_year < 1970; ++current_year)
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2020-08-26 00:17:19 +00:00
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days -= days_in_year(current_year);
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2020-08-25 20:53:36 +00:00
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return days;
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}
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2019-05-28 11:48:06 +00:00
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template<typename TimevalType>
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2019-06-06 16:02:28 +00:00
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inline void timeval_sub(const TimevalType& a, const TimevalType& b, TimevalType& result)
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2019-05-18 00:00:01 +00:00
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{
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2019-06-06 16:02:28 +00:00
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result.tv_sec = a.tv_sec - b.tv_sec;
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result.tv_usec = a.tv_usec - b.tv_usec;
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if (result.tv_usec < 0) {
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--result.tv_sec;
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2020-06-21 17:41:47 +00:00
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result.tv_usec += 1'000'000;
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2019-05-18 00:00:01 +00:00
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}
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}
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2019-05-28 11:48:06 +00:00
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template<typename TimevalType>
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2019-06-06 16:02:28 +00:00
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inline void timeval_add(const TimevalType& a, const TimevalType& b, TimevalType& result)
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2019-05-18 00:00:01 +00:00
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{
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2019-06-06 16:02:28 +00:00
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result.tv_sec = a.tv_sec + b.tv_sec;
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result.tv_usec = a.tv_usec + b.tv_usec;
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2020-08-02 22:45:53 +00:00
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if (result.tv_usec >= 1'000'000) {
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2019-06-06 16:02:28 +00:00
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++result.tv_sec;
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2020-06-21 17:41:47 +00:00
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result.tv_usec -= 1'000'000;
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}
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}
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template<typename TimespecType>
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inline void timespec_sub(const TimespecType& a, const TimespecType& b, TimespecType& result)
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{
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result.tv_sec = a.tv_sec - b.tv_sec;
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result.tv_nsec = a.tv_nsec - b.tv_nsec;
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if (result.tv_nsec < 0) {
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--result.tv_sec;
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result.tv_nsec += 1'000'000'000;
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}
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}
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2020-08-03 15:42:39 +00:00
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template<typename TimespecType, typename TimevalType>
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inline void timespec_sub_timeval(const TimespecType& a, const TimevalType& b, TimespecType& result)
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{
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result.tv_sec = a.tv_sec - b.tv_sec;
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result.tv_nsec = a.tv_nsec - b.tv_usec * 1000;
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if (result.tv_nsec < 0) {
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--result.tv_sec;
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result.tv_nsec += 1'000'000'000;
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}
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}
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2020-06-21 17:41:47 +00:00
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template<typename TimespecType>
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inline void timespec_add(const TimespecType& a, const TimespecType& b, TimespecType& result)
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{
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result.tv_sec = a.tv_sec + b.tv_sec;
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result.tv_nsec = a.tv_nsec + b.tv_nsec;
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2020-08-02 22:45:53 +00:00
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if (result.tv_nsec >= 1000'000'000) {
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2020-06-21 17:41:47 +00:00
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++result.tv_sec;
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result.tv_nsec -= 1000'000'000;
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2019-05-18 00:00:01 +00:00
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}
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}
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2020-08-03 15:42:39 +00:00
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template<typename TimespecType, typename TimevalType>
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inline void timespec_add_timeval(const TimespecType& a, const TimevalType& b, TimespecType& result)
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{
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result.tv_sec = a.tv_sec + b.tv_sec;
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result.tv_nsec = a.tv_nsec + b.tv_usec * 1000;
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if (result.tv_nsec >= 1000'000'000) {
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++result.tv_sec;
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result.tv_nsec -= 1000'000'000;
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}
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}
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2020-04-26 09:20:26 +00:00
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template<typename TimevalType, typename TimespecType>
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inline void timeval_to_timespec(const TimevalType& tv, TimespecType& ts)
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{
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2020-09-18 07:49:51 +00:00
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ts.tv_sec = tv.tv_sec;
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ts.tv_nsec = tv.tv_usec * 1000;
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2020-04-26 09:20:26 +00:00
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}
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template<typename TimespecType, typename TimevalType>
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inline void timespec_to_timeval(const TimespecType& ts, TimevalType& tv)
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{
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tv.tv_sec = ts.tv_sec;
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tv.tv_usec = ts.tv_nsec / 1000;
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}
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2020-08-03 15:42:39 +00:00
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template<typename TimespecType>
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inline bool operator>=(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec > b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec >= b.tv_nsec);
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}
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template<typename TimespecType>
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inline bool operator>(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec > b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec > b.tv_nsec);
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}
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template<typename TimespecType>
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inline bool operator<(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec < b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec < b.tv_nsec);
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}
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template<typename TimespecType>
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inline bool operator<=(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec < b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_nsec <= b.tv_nsec);
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}
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template<typename TimespecType>
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inline bool operator==(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec == b.tv_sec && a.tv_nsec == b.tv_nsec;
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}
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template<typename TimespecType>
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inline bool operator!=(const TimespecType& a, const TimespecType& b)
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{
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return a.tv_sec != b.tv_sec || a.tv_nsec != b.tv_nsec;
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}
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2019-05-18 00:00:01 +00:00
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}
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2019-06-06 16:02:28 +00:00
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2020-08-26 00:32:32 +00:00
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using AK::day_of_week;
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2020-08-25 23:19:16 +00:00
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using AK::day_of_year;
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2020-08-26 00:11:12 +00:00
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using AK::days_in_month;
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2020-08-26 00:17:19 +00:00
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using AK::days_in_year;
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2020-08-25 20:38:24 +00:00
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using AK::is_leap_year;
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2020-06-21 17:41:47 +00:00
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using AK::timespec_add;
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2020-08-03 15:42:39 +00:00
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using AK::timespec_add_timeval;
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2020-06-21 17:41:47 +00:00
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using AK::timespec_sub;
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2020-08-03 15:42:39 +00:00
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using AK::timespec_sub_timeval;
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2020-06-21 17:41:47 +00:00
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using AK::timespec_to_timeval;
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2019-06-06 16:02:28 +00:00
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using AK::timeval_add;
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using AK::timeval_sub;
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2020-04-26 09:20:26 +00:00
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using AK::timeval_to_timespec;
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2020-08-25 20:53:36 +00:00
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using AK::years_to_days_since_epoch;
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2020-08-03 15:42:39 +00:00
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using AK::operator<=;
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using AK::operator<;
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using AK::operator>;
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using AK::operator>=;
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using AK::operator==;
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using AK::operator!=;
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