997 lines
20 KiB
C++
997 lines
20 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) 2012-2018, 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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#include <string>
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#include "convert/inttostr.h"
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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 the 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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current limitation:
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we do not support leap seconds
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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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the date
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*/
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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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/*
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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 the Unix Epoch), tm structure, and strings
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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(const char * str);
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Date(const wchar_t * str);
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Date(const std::string & str);
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Date(const std::wstring & str);
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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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Date & operator=(const char * str);
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Date & operator=(const wchar_t * str);
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Date & operator=(const std::string & str);
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Date & operator=(const std::wstring & str);
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/*
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adding/subtracting time_t (seconds from the 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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swapping the contents of *this with date
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*/
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void Swap(Date & date);
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/*
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converts time_t in seconds (from the 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 the 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 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 the 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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return true if values are 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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bool IsCorrectDate();
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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 outputs to the given stream: YYYY-MM-DD, eg. 1990-02-12
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ISO 8601 format
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*/
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template<class Stream>
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void SerializeYearMonthDay(Stream & out) const;
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/*
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this method outputs to the given stream: HH:MM:SS, eg: 13:05:39
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ISO 8601 format
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*/
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template<class Stream>
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void SerializeHourMinSec(Stream & out) const;
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/*
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this method outputs to the given stream: MM-DD, eg. 02-12 (02 month, 12 day)
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*/
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template<class Stream>
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void SerializeMonthDay(Stream & out) const;
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/*
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this method outputs to the given stream: HH:MM, eg: 13:05
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*/
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template<class Stream>
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void SerializeHourMin(Stream & out) const;
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/*
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this method outputs to the given stream: YYYY-MM-DD HH:MM:SS, eg: 1990-02-12 13:05:39
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ISO 8601 format
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*/
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template<class Stream>
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void Serialize(Stream & out) const;
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/*
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this method outputs to the given stream: YYYY-MM-DDTHH:MM:SSZ, eg: 1990-02-12T13:05:39Z
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ISO 8601 format
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*/
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template<class Stream>
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void SerializeISO(Stream & out) const;
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/*
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parsing day month and year
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the input string can be as follows:
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"12-10-2008"
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white characters are ommited and the method stops after reading the year
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so the input string can be:
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" 12 - 10 - 2008some text "
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a white character means a space or a tab
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as a separator can be '-' '/' or '.'
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so below strings have the same meaning:
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" 12.10.2008 "
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" 12/10 / 2008 "
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseDayMonthYear(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseDayMonthYear(const StringType & str);
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/*
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parsing year month and day
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the input string can be as follows:
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"2008-10-12"
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white characters are ommited and the method stops after reading the day
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so the input string can be:
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" 2008 - 10 - 12some text "
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a white character means a space or a tab
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as a separator can be '-' '/' or '.'
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so below strings have the same meaning:
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" 2008.10.12 "
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" 2008/10 / 12 "
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseYearMonthDay(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseYearMonthDay(const StringType & str);
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/*
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parsing month and day
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the input string can be as follows:
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"10-12" (month: 10, day: 12)
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white characters are ommited and the method stops after reading the day
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so the input string can be:
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" 10 - 12some text "
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a white character means a space or a tab
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as a separator can be '-' '/' or '.'
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so below strings have the same meaning:
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" 10.12 "
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" 10 / 12 "
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseMonthDay(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseMonthDay(const StringType & str);
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/*
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parsing hour minutes and seconds
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the input string can be as follows:
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"14:10:35"
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white characters are ommited and the method stops after reading seconds
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so the input string can be:
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" 14 : 10 : 35some text "
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a white character means a space or a tab
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a separator is only the ':' character
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseHourMinSec(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseHourMinSec(const StringType & str);
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/*
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parsing hour and minutes
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the input string can be as follows:
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"14:10"
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white characters are ommited and the method stops after reading minutes
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so the input string can be:
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" 14 : 10some text "
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a white character means a space or a tab
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a separator is only the ':' character
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseHourMin(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseHourMin(const StringType & str);
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template<class CStringType>
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bool ParseZoneOffset(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseZoneOffset(const StringType & str);
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/*
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parsing hour and minutes (if exists) and seconds (if exists)
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the input string can be as follows:
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"14" -- only an hour given (min and sec will be zero)
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"14:10" -- hour with minutes (sec will be zero)
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"14:10:35" -- hour, minutes and seconds
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white characters are ommited so these are valid strings too:
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" 14 : 10 : 35 "
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" 14 : 10 : 35some text "
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a white character means a space or a tab
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseTime(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseTime(const StringType & str);
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/*
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parsing month, day, hour and minutes (if exists) and seconds (if exists)
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the input string can be as follows:
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"10-23 14" -- only month, day and hour given (min and sec will be zero)
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"10-23 14:10" -- month, day and hour with minutes (sec will be zero)
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"10-23 14:10:35" -- month, day, hour, minutes and seconds
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white characters are ommited so these are valid strings too:
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" 10 - 23 14 : 10 : 35 "
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" 10 - 23 14 : 10 : 35some text "
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a white character means a space or a tab
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this method doesn't test if the values are correct
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use IsCorrectDate() to check
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*/
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template<class CStringType>
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bool ParseMonthDayTime(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool ParseMonthDayTime(const StringType & str);
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/*
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parsing year/month/day hour:min:sec
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the input strings can be as follows:
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"2008-10-12 14:10:35"
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"2008/10/12 14:10:35"
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"2008.10.12 14:10:35"
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"2008-10/12 14:10:35"
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white characters are ommited
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so the input string can be:
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" 2008 - 10 / 12 14 : 10 : 35 "
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a white character means a space or a tab
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as a separator for year/month/day can be '-' '/' or '.'
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see ParseYearMonthDay() for details
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as a separator for hour:min:sec is the ':' character
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see ParseHourMinSec() for details
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at the end the method checks if the values are correct
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(by using IsCorrectDate())
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*/
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template<class CStringType>
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bool Parse(const CStringType * str, const CStringType ** str_after = 0);
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template<class StringType>
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bool Parse(const StringType & str);
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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, size_t min_width) const;
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template<class Stream>
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void SerializeInt(Stream & out, int val) const;
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template<class CStringType>
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void SetAfter(const CStringType * str, const CStringType ** str_after);
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template<class CStringType>
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void SkipWhite(const CStringType * & str);
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template<class CStringType>
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bool ReadInt(const CStringType * & str, int & result, size_t max_digits = 0);
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template<class CStringType>
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bool SkipSeparator(const CStringType * & str, int separator, int separator2 = -1, int separator3 = -1);
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};
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template<class Stream>
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void Date::SerializeInt(Stream & out, int val, size_t min_width) const
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{
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char buf[64];
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size_t len;
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if( Toa(val, buf, sizeof(buf) / sizeof(char), 10, &len) )
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{
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for(size_t i = len ; i < min_width ; ++i)
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{
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out << '0';
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}
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out << buf;
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}
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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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SerializeInt(out, val, 2);
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}
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template<class Stream>
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void Date::SerializeYearMonthDay(Stream & out) const
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{
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SerializeInt(out, year, 4);
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out << '-';
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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::SerializeHourMinSec(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::SerializeMonthDay(Stream & out) const
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{
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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::SerializeHourMin(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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}
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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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SerializeYearMonthDay(out);
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out << ' ';
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SerializeHourMinSec(out);
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}
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template<class Stream>
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void Date::SerializeISO(Stream & out) const
|
|
{
|
|
SerializeYearMonthDay(out);
|
|
out << 'T';
|
|
SerializeHourMinSec(out);
|
|
out << 'Z';
|
|
}
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseDayMonthYear(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
|
|
if( ReadInt(str, day) && SkipSeparator(str, '.', '-', '/') )
|
|
if( ReadInt(str, month) && SkipSeparator(str, '.', '-', '/') )
|
|
if( ReadInt(str, year) )
|
|
result = true;
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseDayMonthYear(const StringType & str)
|
|
{
|
|
return ParseDayMonthYear(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseYearMonthDay(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
|
|
if( ReadInt(str, year) && SkipSeparator(str, '.', '-', '/') )
|
|
if( ReadInt(str, month) && SkipSeparator(str, '.', '-', '/') )
|
|
if( ReadInt(str, day) )
|
|
result = true;
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseYearMonthDay(const StringType & str)
|
|
{
|
|
return ParseYearMonthDay(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseMonthDay(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
|
|
if( ReadInt(str, month) && SkipSeparator(str, '.', '-', '/') )
|
|
if( ReadInt(str, day) )
|
|
result = true;
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseMonthDay(const StringType & str)
|
|
{
|
|
return ParseMonthDay(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseHourMinSec(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
|
|
if( ReadInt(str, hour) && SkipSeparator(str, ':') )
|
|
if( ReadInt(str, min) && SkipSeparator(str, ':') )
|
|
if( ReadInt(str, sec) )
|
|
result = true;
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseHourMinSec(const StringType & str)
|
|
{
|
|
return ParseHourMinSec(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseHourMin(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
|
|
if( ReadInt(str, hour) && SkipSeparator(str, ':') )
|
|
if( ReadInt(str, min) )
|
|
result = true;
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseHourMin(const StringType & str)
|
|
{
|
|
return ParseHourMin(str.c_str());
|
|
}
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseZoneOffset(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
bool result = false;
|
|
bool is_sign = false;
|
|
int offset_hour = 0;
|
|
int offset_min = 0;
|
|
|
|
SkipWhite(str);
|
|
|
|
if( *str == '-' || *str == '+' )
|
|
{
|
|
if( *str == '-' )
|
|
is_sign = true;
|
|
|
|
str += 1;
|
|
|
|
if( ReadInt(str, offset_hour, 2) && offset_hour >= -12 && offset_hour <= 14 )
|
|
{
|
|
SkipWhite(str);
|
|
SetAfter(str, str_after);
|
|
|
|
if( *str == ':' )
|
|
{
|
|
str += 1;
|
|
SkipWhite(str);
|
|
SetAfter(str, str_after);
|
|
}
|
|
|
|
if( ReadInt(str, offset_min, 2) && offset_min > -60 && offset_min < 60 )
|
|
{
|
|
SetAfter(str, str_after);
|
|
}
|
|
else
|
|
{
|
|
offset_min = 0;
|
|
}
|
|
|
|
time_t offset = (time_t)offset_hour * 60 * 60 + (time_t)offset_min * 60;
|
|
result = true;
|
|
|
|
if( is_sign )
|
|
offset = -offset;
|
|
|
|
FromTime(ToTime() - offset);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseZoneOffset(const StringType & str)
|
|
{
|
|
return ParseZoneOffset(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseTime(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
if( !ReadInt(str, hour) )
|
|
{
|
|
SetAfter(str, str_after);
|
|
return false;
|
|
}
|
|
|
|
min = 0;
|
|
sec = 0;
|
|
|
|
if( !SkipSeparator(str, ':') )
|
|
{
|
|
SetAfter(str, str_after);
|
|
return true; // only an hour given
|
|
}
|
|
|
|
if( !ReadInt(str, min) )
|
|
{
|
|
SetAfter(str, str_after);
|
|
return false;
|
|
}
|
|
|
|
if( !SkipSeparator(str, ':') )
|
|
{
|
|
SetAfter(str, str_after);
|
|
return true; // only an hour and minutes given
|
|
}
|
|
|
|
if( !ReadInt(str, sec) )
|
|
{
|
|
SetAfter(str, str_after);
|
|
return false;
|
|
}
|
|
|
|
SetAfter(str, str_after);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseTime(const StringType & str)
|
|
{
|
|
return ParseTime(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ParseMonthDayTime(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
const CStringType * after;
|
|
bool result = false;
|
|
|
|
if( ParseMonthDay(str, &after) )
|
|
if( ParseTime(after, &after) )
|
|
result = true;
|
|
|
|
SetAfter(after, str_after);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::ParseMonthDayTime(const StringType & str)
|
|
{
|
|
return ParseMonthDayTime(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::Parse(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
const CStringType * after;
|
|
bool result = false;
|
|
|
|
if( ParseYearMonthDay(str, &after) )
|
|
{
|
|
SkipWhite(after);
|
|
|
|
if( *after == 'T' )
|
|
{
|
|
// ISO 8601 format
|
|
// https://en.wikipedia.org/wiki/ISO_8601
|
|
// at the moment skip the 'T' character only
|
|
after += 1;
|
|
}
|
|
|
|
if( ParseHourMinSec(after, &after) )
|
|
{
|
|
SkipWhite(after);
|
|
result = true;
|
|
|
|
if( *after == 'Z' )
|
|
{
|
|
after += 1;
|
|
}
|
|
else
|
|
{
|
|
// we dont have to check errors here
|
|
ParseZoneOffset(after, &after);
|
|
}
|
|
}
|
|
}
|
|
|
|
SetAfter(after, str_after);
|
|
|
|
if( result )
|
|
result = IsCorrectDate();
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<class StringType>
|
|
bool Date::Parse(const StringType & str)
|
|
{
|
|
return Parse(str.c_str());
|
|
}
|
|
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
void Date::SetAfter(const CStringType * str, const CStringType ** str_after)
|
|
{
|
|
if( str_after )
|
|
*str_after = str;
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
void Date::SkipWhite(const CStringType * & str)
|
|
{
|
|
while( *str==' ' || *str=='\t' )
|
|
str += 1;
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::ReadInt(const CStringType * & str, int & result, size_t max_digits)
|
|
{
|
|
bool something_read = false;
|
|
|
|
SkipWhite(str);
|
|
result = 0;
|
|
size_t len = 0;
|
|
|
|
while( *str >= '0' && *str <= '9' && (max_digits == 0 || len < max_digits))
|
|
{
|
|
result = result * 10 + (*str - '0');
|
|
str += 1;
|
|
len += 1;
|
|
something_read = true;
|
|
|
|
if( result > 10000 )
|
|
{
|
|
// we assumed the max year to be 10000
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return something_read;
|
|
}
|
|
|
|
|
|
|
|
template<class CStringType>
|
|
bool Date::SkipSeparator(const CStringType * & str, int separator, int separator2, int separator3)
|
|
{
|
|
SkipWhite(str);
|
|
|
|
if( *str == separator )
|
|
{
|
|
str += 1;
|
|
return true;
|
|
}
|
|
|
|
if( separator2 != -1 && *str == separator2 )
|
|
{
|
|
str += 1;
|
|
return true;
|
|
}
|
|
|
|
if( separator3 != -1 && *str == separator3 )
|
|
{
|
|
str += 1;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
#endif
|