294 lines
6.1 KiB
C++
294 lines
6.1 KiB
C++
/*
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* This file is a part of PikoTools
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* and is distributed under the (new) BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2012, Tomasz Sowa
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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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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef headerfile_picotools_mainparser_mainparser
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#define headerfile_picotools_mainparser_mainparser
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#include <ctime>
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namespace PT
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{
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/*
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this class represents a Date (year, month, day, hour, min, sec)
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it has O(1) algorithm when converting from/to time_t (seconds from unix epoch)
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algorithm description:
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http://alcor.concordia.ca/~gpkatch/gdate-algorithm.html
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http://alcor.concordia.ca/~gpkatch/gdate-method.html
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*/
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class Date
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{
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public:
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/*
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default c-ctor sets the unix epoch (Clear method): 1970.01.01 00:00:00
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*/
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Date();
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/*
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converting from Date, time_t (seconds from unix epoch), tm structure
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*/
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Date(const Date & d);
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Date(time_t t);
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Date(const tm & t);
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Date & operator=(const Date & d);
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Date & operator=(time_t t);
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Date & operator=(const tm & t);
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/*
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adding/subtracting time_t (seconds from unix epoch)
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*/
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Date operator+(time_t t) const;
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Date operator-(time_t t) const;
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Date & operator+=(time_t t);
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Date & operator-=(time_t t);
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/*
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returns a difference in second between two dates
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(always a value greater than zero)
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*/
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time_t operator-(const Date & d) const;
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/*
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'Compare' returns zero if this and d are equal
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return value less than zero if this is lower than d
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and a value greater than zero if this is greater than d
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*/
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int Compare(const Date & d) const;
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/*
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returns true if year, month and day are the same
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*/
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bool IsTheSameDay(const Date & d) const;
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/*
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returns true if hour, min and sec are the same
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*/
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bool IsTheSameHour(const Date & d) const;
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/*
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operators for comparing
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*/
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bool operator==(const Date & d) const;
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bool operator!=(const Date & d) const;
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bool operator>(const Date & d) const;
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bool operator>=(const Date & d) const;
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bool operator<(const Date & d) const;
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bool operator<=(const Date & d) const;
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/*
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set unix epoch: 1970.01.01 00:00:00
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*/
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void Clear();
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/*
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assert a correct date (values will be from the correct range)
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year: 1970 - 10000
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month: 1 - 12
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day: 1 - MonthLen
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hour: 0 - 23
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min: 0 - 59
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sec: 0 - 59
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*/
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void AssertCorrectDate();
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/*
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converts time_t in seconds (from unix epoch) to this object
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*/
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void FromTime(time_t t);
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/*
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converts tm structure to this object
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*/
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void FromTm(const tm & t);
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/*
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returns time_t (in seconds from unix epoch)
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*/
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time_t ToTime() const;
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/*
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return tm structure
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only tm_year, tm_mon, tm_mday, tm_hour, tm_min, tm_sec fields are set
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the rest is equal to zero
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*/
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tm ToTm() const;
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/*
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getting/setting the number of days from 0000:03:01 (year 0, month 3 - March, day 1)
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(ToDays() and FromDays() can work even with a year less than 1970)
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*/
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long long ToDays() const;
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void FromDays(long long g);
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/*
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returns how many days there is in a month
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y - year 1970 - ...
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m - month 1-12
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*/
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static int MonthLen(int y, int m);
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/*
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returns true if 'y' is a leap year
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leap year has one additional day (in february) - so the year lasts 366 days
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*/
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static bool IsYearLeap(int y);
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/*
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returns true if the currecn year is a leap year
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*/
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bool IsYearLeap() const;
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/*
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returns a day index from a week
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sunday - 0
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monday - 1
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...
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saturday - 6
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*/
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int WeekDay() const;
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/*
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this method produces: year.month.day, eg. 1990.02.12
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*/
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template<class Stream>
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void SerializeDay(Stream & out) const;
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/*
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this method produces: hour:min:sec, eg: 13:05:39
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*/
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template<class Stream>
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void SerializeHour(Stream & out) const;
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/*
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this method produces: year.month.day our:min:sec, eg: 1990.02.12 13:05:39
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*/
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template<class Stream>
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void Serialize(Stream & out) const;
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int year; // 1970 - ...
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int month; // 1 - 12
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int day; // 1 - 31
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int hour; // 0 - 23
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int min; // 0 - 59
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int sec; // 0 - 59
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private:
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void AssertRange(int & val, int val_min, int val_max);
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template<class Stream>
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void SerializeInt(Stream & out, int val) const;
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};
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template<class Stream>
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void Date::SerializeInt(Stream & out, int val) const
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{
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if( val < 10 )
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out << '0';
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out << val;
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}
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template<class Stream>
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void Date::SerializeDay(Stream & out) const
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{
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out << year << '.';
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SerializeInt(out, month);
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out << '.';
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SerializeInt(out, day);
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}
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template<class Stream>
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void Date::SerializeHour(Stream & out) const
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{
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SerializeInt(out, hour);
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out << ':';
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SerializeInt(out, min);
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out << ':';
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SerializeInt(out, sec);
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}
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template<class Stream>
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void Date::Serialize(Stream & out) const
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{
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SerializeDay(out);
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out << ' ';
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SerializeHour(out);
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}
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} // namespace
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#endif
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