From 0979c96223f89cc3b12b9bfab37092579a2b4073 Mon Sep 17 00:00:00 2001 From: Vadim Zeitlin Date: Sat, 27 Nov 1999 23:26:11 +0000 Subject: [PATCH] my old draft of wxDateTime git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4715 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- include/wx/datetime.h | 1148 +++++++++++++++++++++++++++++++++++++++ src/common/datetime.cpp | 146 +++++ 2 files changed, 1294 insertions(+) create mode 100644 include/wx/datetime.h create mode 100644 src/common/datetime.cpp diff --git a/include/wx/datetime.h b/include/wx/datetime.h new file mode 100644 index 0000000000..ff3f5db6de --- /dev/null +++ b/include/wx/datetime.h @@ -0,0 +1,1148 @@ +///////////////////////////////////////////////////////////////////////////// +// Name: wx/datetime.h +// Purpose: declarations of time/date related classes (wxDateTime, +// wxTimeSpan) +// Author: Vadim Zeitlin +// Modified by: +// Created: 10.02.99 +// RCS-ID: $Id$ +// Copyright: (c) 1998 Vadim Zeitlin +// Licence: wxWindows license +///////////////////////////////////////////////////////////////////////////// + +#ifndef _WX_TIME_H +#define _WX_TIME_H + +#ifdef __GNUG__ + #pragma interface "datetime.h" +#endif + +#include + +#include "wx/longlong.h" + +class WXDLLEXPORT wxDateTime; +class WXDLLEXPORT wxTimeSpan; +class WXDLLEXPORT wxDateSpan; + +/* + * TODO Well, everything :-) + * + * 1. Time zones with minutes (make wxTimeZone a class) + * 2. getdate() function like under Solaris + * 3. text conversion for wxDateSpan + */ + +/* + The three classes declared in this header represent: + + 1. An absolute moment in the time (wxDateTime) + 2. A difference between two moments in the time, positive or negative + (wxTimeSpan) + 3. A logical difference between two dates expressed in + years/months/weeks/days (wxDateSpan) + + The following arithmetic operations are permitted (all others are not): + + addition + -------- + + wxDateTime + wxTimeSpan = wxDateTime + wxDateTime + wxDateSpan = wxDateTime + wxTimeSpan + wxTimeSpan = wxTimeSpan + wxDateSpan + wxDateSpan = wxDateSpan + + substraction + ------------ + wxDateTime - wxDateTime = wxTimeSpan + wxTimeSpan - wxTimeSpan = wxTimeSpan + wxDateSpan - wxDateSpan = wxDateSpan + + multiplication + -------------- + wxTimeSpan * number = wxTimeSpan + wxDateSpan * number = wxDateSpan + + unitary minus + ------------- + -wxTimeSpan = wxTimeSpan + -wxDateSpan = wxDateSpan +*/ + +// ---------------------------------------------------------------------------- +// This class represents an absolute moment in the time +// ---------------------------------------------------------------------------- +class WXDLLEXPORT wxDateTime +{ +public: + // types + // ------------------------------------------------------------------------ + + // a small unsigned integer type for storing things like seconds, days + // of the week, &c. It should be at least short (i.e. not char) to + // contain the number of milliseconds - it may also be 'int' because + // there is no size penalty associated with it in our code, we don't + // store any data in this format + typedef unsigned short wxDateTime_t; + + // the timezones + enum TimeZone + { + // the time in the current time zone + Local, + + // zones from GMT (= Greenwhich Mean Time): they're guaranteed to be + // consequent numbers, so writing something like `GMT0 + offset' is + // safe if abs(offset) <= 12 + + // underscore stands for minus + GMT_12, GMT_11, GMT_10, GMT_9, GMT_8, GMT_7, + GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1, + GMT0, + GMT1, GMT2, GMT3, GMT4, GMT5, GMT6, + GMT7, GMT8, GMT9, GMT10, GMT11, GMT12, + // Note that GMT12 and GMT_12 are not the same: there is a difference + // of exactly one day between them + + // Universal Coordinated Time + UTC = GMT0 + + // TODO add symbolic names for TZ (EST, MET, ...)? + }; + + // the calendar systems we know about: notice that it's valid (for + // this classes purpose anyhow) to work with any of these calendars + // even with the dates before the historical appearance of the + // calendar + enum Calendar + { + Gregorian, // current calendar + Julian // calendar in use since -45 until the 1582 (or later) + + // TODO Hebrew, Chinese, Maya, ... (just kidding) (or then may be not?) + }; + + // these values only are used to identify the different dates of + // adoption of the Gregorian calendar (see IsGregorian()) + // + // All data and comments taken verbatim from "The Calendar FAQ (v 2.0)" + // by Claus Tøndering, http://www.pip.dknet.dk/~c-t/calendar.html + // except for the comments "we take". + // + // Symbol "->" should be read as "was followed by" in the comments + // which follow. + enum GregorianAdoption + { + Gr_Unknown, // no data for this country or it's too uncertain to use + Gr_Standard, // on the day 0 of Gregorian calendar: 15 Oct 1582 + + Gr_Alaska, // Oct 1867 when Alaska became part of the USA + Gr_Albania, // Dec 1912 + + Gr_Austria = Gr_Unknown, // Different regions on different dates + Gr_Austria_Brixen, // 5 Oct 1583 -> 16 Oct 1583 + Gr_Austria_Salzburg = Gr_Austria_Brixen, + Gr_Austria_Tyrol = Gr_Austria_Brixen, + Gr_Austria_Carinthia, // 14 Dec 1583 -> 25 Dec 1583 + Gr_Austria_Styria = Gr_Austria_Carinthia, + + Gr_Belgium, // Then part of the Netherlands + + Gr_Bulgaria = Gr_Unknown, // Unknown precisely (from 1915 to 1920) + Gr_Bulgaria_1, // 18 Mar 1916 -> 1 Apr 1916 + Gr_Bulgaria_2, // 31 Mar 1916 -> 14 Apr 1916 + Gr_Bulgaria_3, // 3 Sep 1920 -> 17 Sep 1920 + + Gr_Canada = Gr_Unknown, // Different regions followed the changes in + // Great Britain or France + + Gr_China = Gr_Unknown, // Different authorities say: + Gr_China_1, // 18 Dec 1911 -> 1 Jan 1912 + Gr_China_2, // 18 Dec 1928 -> 1 Jan 1929 + + Gr_Czechoslovakia, // (Bohemia and Moravia) 6 Jan 1584 -> 17 Jan 1584 + Gr_Denmark, // (including Norway) 18 Feb 1700 -> 1 Mar 1700 + Gr_Egypt, // 1875 + Gr_Estonia, // 1918 + Gr_Finland, // Then part of Sweden + + Gr_France, // 9 Dec 1582 -> 20 Dec 1582 + Gr_France_Alsace, // 4 Feb 1682 -> 16 Feb 1682 + Gr_France_Lorraine, // 16 Feb 1760 -> 28 Feb 1760 + Gr_France_Strasbourg, // February 1682 + + Gr_Germany = Gr_Unknown, // Different states on different dates: + Gr_Germany_Catholic, // 1583-1585 (we take 1584) + Gr_Germany_Prussia, // 22 Aug 1610 -> 2 Sep 1610 + Gr_Germany_Protestant, // 18 Feb 1700 -> 1 Mar 1700 + + Gr_GreatBritain, // 2 Sep 1752 -> 14 Sep 1752 (use 'cal(1)') + + Gr_Greece, // 9 Mar 1924 -> 23 Mar 1924 + Gr_Hungary, // 21 Oct 1587 -> 1 Nov 1587 + Gr_Ireland = Gr_GreatBritain, + Gr_Italy = Gr_Standard, + + Gr_Japan = Gr_Unknown, // Different authorities say: + Gr_Japan_1, // 19 Dec 1872 -> 1 Jan 1873 + Gr_Japan_2, // 19 Dec 1892 -> 1 Jan 1893 + Gr_Japan_3, // 18 Dec 1918 -> 1 Jan 1919 + + Gr_Latvia, // 1915-1918 (we take 1915) + Gr_Lithuania, // 1915 + Gr_Luxemburg, // 14 Dec 1582 -> 25 Dec 1582 + Gr_Netherlands = Gr_Belgium, // (including Belgium) 1 Jan 1583 + + // this is too weird to take into account: the Gregorian calendar was + // introduced twice in Groningen, first time 28 Feb 1583 was followed + // by 11 Mar 1583, then it has gone back to Julian in the summer of + // 1584 and then 13 Dec 1700 -> 12 Jan 1701 - which is + // the date we take here + Gr_Netherlands_Groningen, // 13 Dec 1700 -> 12 Jan 1701 + Gr_Netherlands_Gelderland, // 30 Jun 1700 -> 12 Jul 1700 + Gr_Netherlands_Utrecht, // (and Overijssel) 30 Nov 1700->12 Dec 1700 + Gr_Netherlands_Friesland, // (and Drenthe) 31 Dec 1700 -> 12 Jan 1701 + + Gr_Norway = Gr_Denmark, // Then part of Denmark + Gr_Poland = Gr_Standard, + Gr_Portugal = Gr_Standard, + Gr_Romania, // 31 Mar 1919 -> 14 Apr 1919 + Gr_Russia, // 31 Jan 1918 -> 14 Feb 1918 + Gr_Scotland = Gr_GreatBritain, + Gr_Spain = Gr_Standard, + + // Sweden has a curious history. Sweden decided to make a gradual + // change from the Julian to the Gregorian calendar. By dropping every + // leap year from 1700 through 1740 the eleven superfluous days would + // be omitted and from 1 Mar 1740 they would be in sync with the + // Gregorian calendar. (But in the meantime they would be in sync with + // nobody!) + // + // So 1700 (which should have been a leap year in the Julian calendar) + // was not a leap year in Sweden. However, by mistake 1704 and 1708 + // became leap years. This left Sweden out of synchronisation with + // both the Julian and the Gregorian world, so they decided to go back + // to the Julian calendar. In order to do this, they inserted an extra + // day in 1712, making that year a double leap year! So in 1712, + // February had 30 days in Sweden. + // + // Later, in 1753, Sweden changed to the Gregorian calendar by + // dropping 11 days like everyone else. + Gr_Sweden = Gr_Finland, // 17 Feb 1753 -> 1 Mar 1753 + + Gr_Switzerland = Gr_Unknown,// Different cantons used different dates + Gr_Switzerland_Catholic, // 1583, 1584 or 1597 (we take 1584) + Gr_Switzerland_Protestant, // 31 Dec 1700 -> 12 Jan 1701 + + Gr_Turkey, // 1 Jan 1927 + Gr_USA = Gr_GreatBritain, + Gr_Wales = Gr_GreatBritain, + Gr_Yugoslavia // 1919 + }; + + // the country parameter is used so far for calculating the start and + // the end of DST period and for deciding whether the date is a work + // day or not + // + // TODO move this to intl.h + enum Country + { + Country_Unknown, // no special information for this country + Country_Default, // set the default country with SetCountry() method + + // TODO add more countries (for this we must know about DST and/or + // holidays for this country) + France, + USA + }; + + // symbolic names for the months + enum Month + { + Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec, Inv_Month + }; + + // symbolic names for the weekdays + enum WeekDay + { + Sun, Mon, Tue, Wed, Thu, Fri, Sat, Inv_WeekDay + }; + + // invalid value for the year + enum Year + { + Inv_Year = INT_MIN + }; + + // static methods + // ------------------------------------------------------------------------ + + // set the current country + static void SetCountry(Country country); + // get the current country + static Country GetCountry(); + + // return the current year + static int GetCurrentYear(Calendar cal = Gregorian); + + // convert the year as returned by wxDateTime::GetYear() to a year + // suitable for BC/AD notation. The difference is that BC year 1 + // corresponds to the year 0 (while BC year 0 didn't exist) and AD + // year N is just year N. + static int ConvertYearToBC(int year); + + // return the current month + static Month GetCurrentMonth(Calendar cal = Gregorian); + + // returns TRUE if the given year is a leap year in the given calendar + static bool IsLeapYear(int year, Calendar cal = Gregorian); + + // returns the number of days in this year (356 or 355 typically :-) + static wxDateTime_t GetNumberOfDays(int year, Calendar cal = Gregorian); + + // get the number of the days in the given month (default value for + // the year means the current one) + static wxDateTime_t GetNumberOfDays(Month month, + int year = Inv_Year, + Calendar cal = Gregorian); + + // get the month name in the current locale + static wxString GetMonthName(Month month); + + // get the weekday name in the current locale + static wxString GetDayOfWeekName(WeekDay weekday); + + // get the beginning of DST for this year, will return invalid object + // if no DST applicable in this year. The default value of the + // parameter means to take the current year. + static wxDateTime GetBeginDST(int year = Inv_Year); + // get the end of DST for this year, will return invalid object + // if no DST applicable in this year. The default value of the + // parameter means to take the current year. + static wxDateTime GetEndDST(int year = Inv_Year); + + // constructors: you should test whether the constructor succeeded with + // IsValid() function. The values Inv_Month and Inv_Year for the + // parameters mean take current month and/or year values. + // ------------------------------------------------------------------------ + + // default ctor does not initialize the object, use Set()! + wxDateTime() { } + + // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970) + inline wxDateTime(time_t timet); + // from broken down time/date + inline wxDateTime(const struct tm& tm); + + // from separate values for each component, date set to today + inline wxDateTime(wxDateTime_t hour, + wxDateTime_t minute = 0, + wxDateTime_t second = 0, + wxDateTime_t millisec = 0); + // from separate values for each component with explicit date + inline wxDateTime(wxDateTime_t day, + Month month = Inv_Month, + int year = Inv_Year, // 1999, not 99 please! + wxDateTime_t hour = 0, + wxDateTime_t minute = 0, + wxDateTime_t second = 0, + wxDateTime_t millisec = 0); + + // default copy ctor ok + + // no dtor + + // assignment operators and Set() functions: all non const methods return + // the reference to this object. IsValid() should be used to test whether + // the function succeeded. + // ------------------------------------------------------------------------ + + // set to the current time + inline wxDateTime& SetToCurrent(); + + // set to given time_t value + inline wxDateTime& Set(time_t timet); + + // set to given broken down time/date + wxDateTime& Set(const struct tm& tm); + + // set to given time, date = today + wxDateTime& Set(wxDateTime_t hour, + wxDateTime_t minute = 0, + wxDateTime_t second = 0, + wxDateTime_t millisec = 0); + + // from separate values for each component with explicit date + // (defaults for month and year are the current values) + wxDateTime& Set(wxDateTime_t day, + Month month = Inv_Month, + int year = Inv_Year, // 1999, not 99 please! + wxDateTime_t hour = 0, + wxDateTime_t minute = 0, + wxDateTime_t second = 0, + wxDateTime_t millisec = 0); + + // resets time to 00:00:00, doesn't change the date + wxDateTime& ResetTime(); + + // the following functions don't change the values of the other + // fields, i.e. SetMinute() won't change either hour or seconds value + + // set the year + wxDateTime& SetYear(int year); + // set the month + wxDateTime& SetMonth(Month month); + // set the day of the month + wxDateTime& SetDay(wxDateTime_t day); + // set hour + wxDateTime& SetHour(wxDateTime_t hour); + // set minute + wxDateTime& SetMinute(wxDateTime_t minute); + // set second + wxDateTime& SetSecond(wxDateTime_t second); + // set millisecond + wxDateTime& SetMillisecond(wxDateTime_t millisecond); + + // assignment operator from time_t + wxDateTime& operator=(time_t timet) { return Set(timet); } + + // assignment operator from broken down time/date + wxDateTime& operator=(const struct tm& tm) { return Set(tm); } + + // default assignment operator is ok + + // calendar calculations (functions which set the date only leave the time + // unchanged, e.g. don't explictly zero it) + // ------------------------------------------------------------------------ + + // set to Nth occurence of given weekday in the given month of the + // given year (time is set to 0), return TRUE on success and FALSE on + // failure. n may be positive (1..5) or negative to count from the end + // of the month (see helper function SetToLastWeekDay()) + bool SetToWeekDay(WeekDay weekday, + int n = 1, + wxDateTime_t month = Inv_Month, + int year = Inv_Year); + + // sets to the last weekday in the given month, year + inline bool SetToLastWeekDay(WeekDay weekday, + wxDateTime_t month = Inv_Month, + int year = Inv_Year); + + // sets the date to the given day of the given week in the year, + // returns TRUE on success and FALSE if given date doesn't exist (e.g. + // numWeek is > 53) + bool SetToTheWeek(wxDateTime_t numWeek, WeekDay weekday = Mon); + + // get the century (19 for 1999, 20 for 2000 and -5 for 492 BC) + int GetCentury() const; + + // The definitions below were taken verbatim from + // + // http://www.capecod.net/~pbaum/date/date0.htm + // + // (Peter Baum's home page) + // + // definition: The Julian Day Number, Julian Day, or JD of a + // particular instant of time is the number of days and fractions of a + // day since 12 hours Universal Time (Greenwich mean noon) on January + // 1 of the year -4712, where the year is given in the Julian + // proleptic calendar. The idea of using this reference date was + // originally proposed by Joseph Scalizer in 1582 to count years but + // it was modified by 19th century astronomers to count days. One + // could have equivalently defined the reference time to be noon of + // November 24, -4713 if were understood that Gregorian calendar rules + // were applied. Julian days are Julian Day Numbers and are not to be + // confused with Julian dates. + // + // definition: The Rata Die number is a date specified as the number + // of days relative to a base date of December 31 of the year 0. Thus + // January 1 of the year 1 is Rata Die day 1. + + // get the Julian Day number + long GetJulianDay() const; + + // get the Rata Die number + long GetRataDie() const; + + // TODO algorithms for calculating some important dates, such as + // religious holidays (Easter...) or moon/solar eclipses? Some + // algorithms can be found in the calendar FAQ + + // accessors: many of them take the timezone parameter which indicates the + // timezone for which to make the calculations and the default value means + // to do it for the current timezone of this machine (even if the function + // only operates with the date it's necessary because a date may wrap as + // result of timezone shift) + // ------------------------------------------------------------------------ + + // is the date valid (FALSE for uninitialized objects as well as after + // the functions which failed to convert the date to supported range) + inline bool IsValid() const { return this != &ms_InvDateTime; } + + // get the year (returns Inv_Year if date is invalid) + int GetYear(TimeZone zone = Local) const; + // get the month (Inv_Month if date is invalid) + Month GetMonth(TimeZone zone = Local) const; + // get the month day (in 1..31 range, 0 if date is invalid) + wxDateTime_t GetDay(TimeZone zone = Local) const; + // get the day of the week (Inv_WeekDay if date is invalid) + WeekDay GetDayOfWeek(TimeZone zone = Local) const; + // get the hour of the day + wxDateTime_t GetHour(TimeZone zone = Local) const; + // get the minute + wxDateTime_t GetMinute(TimeZone zone = Local) const; + // get the second + wxDateTime_t GetSecond(TimeZone zone = Local) const; + // get milliseconds + wxDateTime_t GetMillisecond(TimeZone zone = Local) const; + + // get the day since the year start (1..366, 0 if date is invalid) + wxDateTime_t GetDayOfYear() const; + // get the week number since the year start (1..52, 0 if date is + // invalid) + wxDateTime_t GetWeekOfYear() const; + + // is this date a work day? This depends on a country, of course, + // because the holidays are different in different countries + bool IsWorkDay(Country country = Current, TimeZone zone = local) const; + + // is this date later than Gregorian calendar introduction for the + // given country (see enum GregorianAdoption)? + // + // NB: this function shouldn't be considered as absolute authoiruty in + // the matter. Besides, for some countries the exact date of + // adoption of the Gregorian calendar is simply unknown. + bool IsGregorianDate(GregorianAdoption country = Gregorian_Standard) const; + + // is daylight savings time in effect at this moment? + // + // Return value is > 0 if DST is in effect, 0 if it is not and -1 if + // the information is not available (this is compatible with ANSI C) + int IsDST(Country country = Country_Default, TimeZone zone = local) const; + + // comparison (see also functions below for operator versions) + // ------------------------------------------------------------------------ + + // returns TRUE if the date is strictly earlier than the given one + bool IsEarlierThan(const wxDateTime& datetime) const; + + // returns TRUE if the date is strictly later than the given one + bool IsLaterThan(const wxDateTime& datetime) const; + + // returns TRUE if the date is strictly in the given range + bool IsStrictlyBetween(const wxDateTime& t1, const wxDateTime& t2) const; + // returns TRUE if the date is in the given range + bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; + + // date operations: for the non-const methods, the return value is this + // object itself (see also functions below for operator versions) + // ------------------------------------------------------------------------ + + // add a time span (positive or negative) + wxDateTime& Add(const wxTimeSpan& diff); + // add a time span (positive or negative) + wxDateTime& operator+=(const wxTimeSpan& diff) { return Add(diff); } + + // substract a time span (positive or negative) + inline wxDateTime& Substract(const wxTimeSpan& diff); + // substract a time span (positive or negative) + inline wxDateTime& operator-=(const wxTimeSpan& diff); + + // add a date span (positive or negative) + wxDateTime& Add(const wxDateSpan& diff); + // add a date span (positive or negative) + wxDateTime& operator+=(const wxDateSpan& diff) { return Add(diff); } + + // substract a date span (positive or negative) + inline wxDateTime& Substract(const wxDateSpan& diff); + // substract a date span (positive or negative) + inline wxDateTime& operator-=(const wxDateSpan& diff); + + // substract a date (may result in positive or negative time span) + wxTimeSpan Substract(const wxDateTime& datetime) const; + // substract a date (may result in positive or negative time span) + wxTimeSpan operator-(const wxDateTime& datetime) const; + + // conversion to/from text: all conversions from text return TRUE on + // success or FALSE if the date is malformed/out of supported range + // ------------------------------------------------------------------------ + + // parse a string in RFC 822 format (found e.g. in mail headers and + // having the form "Wed, 10 Feb 1999 19:07:07 +0100") + bool ParseRfc822Date(const wxString& date); + // parse a date/time in the given format (see strptime(3)) + bool ParseFormat(const wxString& date, const char *format = "%c"); + // parse a string containing the date/time in "free" format, this + // function will try to make an educated guess at the string contents + // (and return FALSE if it fails) + bool ParseDateTime(const wxString& date); + + // this function accepts strftime()-like format string (default + // argument corresponds to the preferred date and time representation + // for the current locale) and returns the string containing the + // resulting text representation + wxString Format(const char *format = "%c") const; + // preferred date representation for the current locale + wxString FormatDate() const { return Format("%x"); } + // preferred time representation for the current locale + wxString FormatTime() const { return Format("%X"); } + + // implementation + // ------------------------------------------------------------------------ + + // get the internal representation + inline wxLongLong GetValue() const; + +private: + // a helper function to get the current time_t + static inline time_t GetTimeNow() { return time((time_t *)NULL); } + + // the current country - as it's the same for all program objects (unless + // it runs on a _really_ big load balancing system), this is a static + // member: see SetCountry() and GetCountry() + static Country ms_country; + + // the internal representation of the time is the amount of milliseconds + // elapsed since the origin which is set by convention to the UNIX/C epoch + // value: the midnight of on January 1, 1970 (UTC) + wxLongLong m_time; + + // this constant is used to transform a time_t value to the internal + // representation, as time_t is in seconds and we use milliseconds it's + // fixed to 1000 + static const int TIME_T_FACTOR; + + // invalid wxDateTime object - returned by all functions which return + // "wxDateTime &" on failure + static wxDateTime ms_InvDateTime; +}; + +// ---------------------------------------------------------------------------- +// This class contains a difference between 2 wxDateTime values, so it makes +// sense to add it to wxDateTime and it is the result of substraction of 2 +// objects of that class. See also wxDateSpan. +// ---------------------------------------------------------------------------- +class WXDLLEXPORT wxTimeSpan +{ +public: + // constructors + // ------------------------------------------------------------------------ + + // default ctor constructs the 0 time span + wxTimeSpan() { } + + // from separate values for each component, date set to 0 (hours are + // not restricted to 0..24 range, neither are minutes, seconds or + // milliseconds) + wxTimeSpan(int hours, + int minutes = 0, + int seconds = 0, + int milliseconds = 0); + // from separate values for each component with explicit date (none of + // the parameters isn't restricted to any range) + wxTimeSpan(int years, + int months, + int days, + int hours = 0, + int minutes = 0, + int seconds = 0, + int milliseconds = 0); + + // from internal representation + wxTimeSpan(wxLongLong diff) : m_diff(diff) { } + + // default copy ctor is ok + + // no dtor + + // arithmetics with time spans + // ------------------------------------------------------------------------ + + // add two timespans together + inline wxTimeSpan& Add(const wxTimeSpan& diff); + // add two timespans together + wxTimeSpan& operator+=(const wxTimeSpan& diff) { return Add(diff); } + // add two timespans together + inline wxTimeSpan operator+(const wxTimeSpan& ts1, const wxTimeSpan& ts2); + + // substract another timespan + inline wxTimeSpan& Substract(const wxTimeSpan& diff); + // substract another timespan + wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Substract(diff); } + // substract two timespans + inline wxTimeSpan operator-(const wxTimeSpan& ts1, const wxTimeSpan& ts2); + + // multiply timespan by a scalar + inline wxTimeSpan& Multiply(int n); + // multiply timespan by a scalar + wxTimeSpan& operator*=(int n) { return Multiply(n); } + // multiply timespan by a scalar + inline wxTimeSpan operator*(int n) const; + + // return this timespan with inversed sign + wxTimeSpan Negate() { return wxTimeSpan(-GetValue()); } + // negate the value of the timespan + wxTimeSpan& Neg() { m_diff = -GetValue(); return *this; } + // negate the value of the timespan + wxTimeSpan& operator-() { return Neg(); } + + // return the absolute value of the timespan: does _not_ modify the + // object + inline wxTimeSpan Abs() const; + + // there is intentionally no division because we don't want to + // introduce rounding errors in time calculations + + // comparaison (see also operator versions below) + // ------------------------------------------------------------------------ + + // is the timespan null? + bool IsNull() const { return m_diff == 0; } + // returns true if the timespan is null + bool operator!() const { return !IsNull(); } + + // is the timespan positive? + bool IsPositive() const { return m_diff > 0; } + + // is the timespan negative? + bool IsNegative() const { return m_diff < 0; } + + // are two timespans equal? + inline bool IsEqualTo(const wxTimeSpan& ts) const; + // compare two timestamps: works with the absolute values, i.e. -2 + // hours is longer than 1 hour. Also, it will return FALSE if the + // timespans are equal in absolute value. + inline bool IsLongerThan(const wxTimeSpan& ts) const; + // compare two timestamps: works with the absolute values, i.e. 1 + // hour is shorter than -2 hours. Also, it will return FALSE if the + // timespans are equal in absolute value. + bool IsShorterThan(const wxTimeSpan& t) const { return !IsLongerThan(t); } + + // breaking into years, ..., days, ..., seconds: all these functions + // behave like GetYears() which returns 1 for the timespan of 1 year and 1 + // day, but 0 (and not -1) for the negative timespan of 1 year without 1 + // day. IOW, (ts - wxTimeSpan(ts.GetYears())).GetYears() is always 0. + // ------------------------------------------------------------------------ + + // get the max number of years in this timespan + inline int GetYears() const; + // get the max number of months in this timespan + inline int GetMonths() const; + // get the max number of weeks in this timespan + inline int GetWeeks() const; + // get the max number of days in this timespan + inline int GetDays() const; + // get the max number of hours in this timespan + inline int GetHours() const; + // get the max number of minutes in this timespan + inline int GetMinutes() const; + // get the max number of seconds in this timespan + inline int GetSeconds() const; + // get the number of milliseconds in this timespan + int GetMilliseconds() const { return m_diff; } + + // conversion to text + // ------------------------------------------------------------------------ + + // this function accepts strftime()-like format string (default + // argument corresponds to the preferred date and time representation + // for the current locale) and returns the string containing the + // resulting text representation. Notice that only some of format + // specifiers valid for wxDateTime are valid for wxTimeSpan: hours, + // minutes and seconds make sense, but not "PM/AM" string for example. + wxString Format(const char *format = "%c") const; + // preferred date representation for the current locale + wxString FormatDate() const { return Format("%x"); } + // preferred time representation for the current locale + wxString FormatTime() const { return Format("%X"); } + + // implementation + // ------------------------------------------------------------------------ + + // get the internal representation + wxLongLong GetValue() const { return m_diff; } + +private: + // the (signed) time span in milliseconds + wxLongLong m_diff; +}; + +// ---------------------------------------------------------------------------- +// This class is a "logical time span" and is useful for implementing program +// logic for such things as "add one month to the date" which, in general, +// doesn't mean to add 60*60*24*31 seconds to it, but to take the same date +// the next month (to understand that this is indeed different consider adding +// one month to Feb, 15 - we want to get Mar, 15, of course). +// +// When adding a month to the date, all lesser components (days, hours, ...) +// won't be changed. +// +// wxDateSpan can be either positive or negative. They may be +// multiplied by scalars which multiply all deltas by the scalar: i.e. 2*(1 +// month and 1 day) is 2 months and 2 days. They can be added together and +// with wxDateTime or wxTimeSpan, but the type of result is different for each +// case. +// +// Beware about weeks: if you specify both weeks and days, the total number of +// days added will be 7*weeks + days! See also GetTotalDays() function. +// +// Finally, notice that for adding hours, minutes &c you don't need this +// class: wxTimeSpan will do the job because there are no subtleties +// associated with those. +// ---------------------------------------------------------------------------- +class WXDLLEXPORT wxDateSpan +{ +public: + // constructors + // ------------------------------------------------------------------------ + + // this many years/months/weeks/days + wxDateSpan(int years, int months, int weeks, int days); + + // default copy ctor is ok + + // no dtor + + // accessors (all SetXXX() return the (modified) wxDateSpan object) + // ------------------------------------------------------------------------ + + // set number of years + wxDateSpan& SetYears(int n) { m_years = n; return this; } + // set number of months + wxDateSpan& SetMonths(int n) { m_months = n; return this; } + // set number of weeks + wxDateSpan& SetWeeks(int n) { m_weeks = n; return this; } + // set number of days + wxDateSpan& SetDays(int n) { m_days = n; return this; } + + // get number of years + int GetYears() const { return m_years; } + // get number of months + int GetMonths() const { return m_months; } + // get number of weeks + int GetWeeks() const { return m_weeks; } + // get number of days + int GetDays() const { return m_days; } + // returns 7*GetWeeks() + GetDays() + int GetTotalDays() const { return 7*m_weeks + m_days; } + + // arithmetics + // ------------------------------------------------------------------------ + + // add another wxDateSpan to us + inline wxDateSpan& Add(const wxDateSpan& other); + // add another wxDateSpan to us + inline wxDateSpan& operator+=(const wxDateSpan& other); + + // substract another wxDateSpan from us + inline wxDateSpan& Substract(const wxDateSpan& other); + // substract another wxDateSpan from us + inline wxDateSpan& operator-=(const wxDateSpan& other); + + // return a copy of this time span with changed sign + inline wxDateSpan Negate() const; + // inverse the sign of this timespan + inline wxDateSpan& Neg(); + // inverse the sign of this timespan + wxDateSpan& operator-() { return Neg(); } + + // multiply all components by a (signed) number + inline wxDateSpan& operator*=(int factor); + +private: + int m_years, + m_months, + m_weeks, + m_days; +}; + +WXDLLEXPORT_DATA(extern wxDateSpan) wxYear; +WXDLLEXPORT_DATA(extern wxDateSpan) wxMonth; +WXDLLEXPORT_DATA(extern wxDateSpan) wxWeek; +WXDLLEXPORT_DATA(extern wxDateSpan) wxDay; + +// ============================================================================ +// binary operators +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxDateTime operators +// ---------------------------------------------------------------------------- + +inline bool WXDLLEXPORT operator<(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() < t2.GetValue() +} + +inline bool WXDLLEXPORT operator<=(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() <= t2.GetValue() +} + +inline bool WXDLLEXPORT operator>(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() > t2.GetValue() +} + +inline bool WXDLLEXPORT operator>=(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() >= t2.GetValue() +} + +inline bool WXDLLEXPORT operator==(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() == t2.GetValue() +} + +inline bool WXDLLEXPORT operator!=(const wxDateTime &t1, const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return t1.GetValue() != t2.GetValue() +} + +inline wxTimeSpan WXDLLEXPORT operator-(const wxDateTime &t1, + const wxDateTime &t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + + return wxTimeSpan(t1.GetValue() - t2.GetValue()); +} + +// ---------------------------------------------------------------------------- +// wxTimeSpan operators +// ---------------------------------------------------------------------------- + +inline bool WXDLLEXPORT operator<(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() < t2.GetValue() +} + +inline bool WXDLLEXPORT operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() <= t2.GetValue() +} + +inline bool WXDLLEXPORT operator>(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() > t2.GetValue() +} + +inline bool WXDLLEXPORT operator>=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() >= t2.GetValue() +} + +inline bool WXDLLEXPORT operator==(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() == t2.GetValue() +} + +inline bool WXDLLEXPORT operator!=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() != t2.GetValue(); +} + +// ---------------------------------------------------------------------------- +// wxDateSpan +// ---------------------------------------------------------------------------- + +inline WXDLLEXPORT wxDateSpan operator+(const wxDateSpan& rt1, + const wxDateSpan& rt2) +{ + return wxDateSpan(rt1.m_years + rt2.m_years, + rt1.m_months + rt2.m_months, + rt1.m_weeks + rt2.m_weeks, + rt1.m_days + rt2.m_days); +} + +// ============================================================================ +// inline functions implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxDateTime +// ---------------------------------------------------------------------------- + +const int wxDateTime::TIME_T_FACTOR = 1000; + +wxDateTime& Set(time_t timet) +{ + m_time = timet * wxDateTime::TIME_T_FACTOR; + + return *this; +} + +wxDateTime& SetToCurrent() +{ + return Set(GetTimeNow()); +} + +wxDateTime::wxDateTime(time_t timet) +{ + Set(timet); +} + +wxDateTime::wxDateTime(const struct tm& tm) +{ + Set(tm); +} + +wxDateTime::wxDateTime(wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) +{ + Set(hour, minute, second, millisec); +} + +wxDateTime::wxDateTime(wxDateTime_t day, + Month month, + int year, + wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) +{ + Set(day, month, year, hour, minute, second, millisec); +} + +wxLongLong wxDateTime::GetValue() const +{ + wxASSERT_MSG( IsValid(), "invalid wxDateTime"); + + return m_time; +} + +bool wxDateTime::SetToLastWeekDay(WeekDay weekday, + wxDateTime_t month, + int year) +{ + SetToWeekDay(weekday, -1, month, year); +} + +wxDateTime& wxDateTime::Substract(const wxTimeSpan& diff) +{ + return Add(diff.Negate()); +} + +wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff) +{ + return Add(diff.Negate()); +} + +wxDateTime& wxDateTime::Substract(const wxDateSpan& diff) +{ + return Add(diff.Negate()); +} + +wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff) +{ + return Add(diff.Negate()); +} + +wxTimeSpan wxDateTime::operator-(const wxDateTime& datetime) const +{ + return Substract(datetime); +} + +// ---------------------------------------------------------------------------- +// wxTimeSpan +// ---------------------------------------------------------------------------- + +wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff) +{ + m_diff += diff.GetValue(); + + return *this; +} + +wxTimeSpan& wxTimeSpan::Substract(const wxTimeSpan& diff) +{ + m_diff -= diff.GetValue(); + + return *this; +} + +wxTimeSpan& wxTimeSpan::Multiply(int n) +{ + m_diff *= n; + + return *this; +} + +wxTimeSpan wxTimeSpan::operator*(int n) const +{ + wxTimeSpan result(*this); + result.Multiply(n); + + return result; +} + +wxTimeSpan wxTimeSpan::Abs() const +{ + return wxTimeSpan(GetValue().Abs()); +} + +bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const +{ + return GetValue() == ts.GetValue(); +} + +bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const +{ + return Abs() > ts.Abs(); +} + +// ---------------------------------------------------------------------------- +// wxDateSpan +// ---------------------------------------------------------------------------- + +wxDateSpan& +wxDateSpan::operator+=(const wxDateSpan& other) +{ + m_years += other.m_years; + m_months += other.m_months; + m_weeks += other.m_weeks; + m_days += other.m_days; + + return *this; +} + +wxDateSpan& wxDateSpan::operator*=(int factor) +{ + m_years *= m_years; + m_months *= m_months; + m_weeks *= m_weeks; + m_days *= m_days; + + return *this; +} + +wxDateSpan Negate() const +{ + return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days); +} + +wxDateSpan& Neg() +{ + m_years = -m_years; + m_months = -m_months; + m_weeks = -m_weeks; + m_days = -m_days; + + return *this; +} + +#endif // _WX_TIME_H diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp new file mode 100644 index 0000000000..6161193d34 --- /dev/null +++ b/src/common/datetime.cpp @@ -0,0 +1,146 @@ +///////////////////////////////////////////////////////////////////////////// +// Name: wx/datetime.h +// Purpose: implementation of time/date related classes +// Author: Vadim Zeitlin +// Modified by: +// Created: 11.05.99 +// RCS-ID: $Id$ +// Copyright: (c) 1998 Vadim Zeitlin +// Licence: wxWindows license +///////////////////////////////////////////////////////////////////////////// + +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + +#ifdef __GNUG__ + #pragma implementation "datetime.h" +#endif + +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" + +#ifdef __BORLANDC__ + #pragma hdrstop +#endif + +#ifndef WX_PRECOMP + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/log.h" +#endif // WX_PRECOMP + +#include "wx/datetime.h" + +// ============================================================================ +// implementation of wxDateTime +// ============================================================================ + +// ---------------------------------------------------------------------------- +// static data +// ---------------------------------------------------------------------------- + +Country wxDateTime::ms_country; +wxDateTime wxDateTime::ms_InvDateTime; + +// ---------------------------------------------------------------------------- +// constructors and assignment operators +// ---------------------------------------------------------------------------- + +wxDateTime& wxDateTime::Set(const struct tm& tm) +{ + time_t timet = mktime(tm); + if ( timet == (time_t)(-1) ) + { + wxFAIL_MSG(_T("Invalid time")); + + return ms_InvDateTime; + } + else + { + return Set(timet); + } +} + +wxDateTime& wxDateTime::Set(wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) +{ + // we allow seconds to be 61 to account for the leap seconds, even if we + // don't use them really + wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000, + ms_InvDateTime, + _T("Invalid time in wxDateTime::Set()") ); + + // get the current date from system + time_t timet = GetTimeNow(); + struct tm *tm = localtime(&timet); + + // adjust the time + tm->tm_hour = hour; + tm->tm_min = minute; + tm->tm_sec = second; + + (void)Set(tm); + + // and finally adjust milliseconds + return SetMillisecond(millisec); +} + +wxDateTime& wxDateTime::Set(wxDateTime_t day, + Month month, + int year, + wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) +{ + wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000, + ms_InvDateTime, + _T("Invalid time in wxDateTime::Set()") ); + + if ( year == Inv_Year ) + year = GetCurrentYear(); + if ( month == Inv_Month ) + month = GetCurrentMonth(); + + wxCHECK_MSG( day < GetNumberOfDays(month, year), ms_InvDateTime, + _T("Invalid date in wxDateTime::Set()") ); + + // the range of time_t type (inclusive) + static const int yearMinInRange = 1970; + static const int yearMaxInRange = 2037; + + // test only the year instead of testing for the exact end of the Unix + // time_t range - it doesn't bring anything to do more precise checks + if ( year >= yearMaxInRange && year <= yearMaxInRange ) + { + // use the standard library version if the date is in range - this is + // probably much more efficient than our code + struct tm tm; + tm.tm_year = year; + tm.tm_mon = month; + tm.tm_mday = day; + tm.tm_hour = hour; + tm.tm_min = minute; + tm.tm_sec = second; + + (void)Set(tm); + + // and finally adjust milliseconds + return SetMillisecond(millisec); + } + else + { + // do time calculations ourselves: we want to calculate the number of + // milliseconds between the given date and the epoch (necessarily + // negative) + } + + return *this; +}