// Author: Vadim Zeitlin
// Modified by:
// Created: 10.02.99
-// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// 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
// helper classes
// ------------------------------------------------------------------------
- // a class representing a time zone: basicly, this is just an offset
+ // a class representing a time zone: basically, this is just an offset
// (in seconds) from GMT
class WXDLLIMPEXP_BASE TimeZone
{
// default assignment operator is ok
// calendar calculations (functions which set the date only leave the time
- // unchanged, e.g. don't explictly zero it): SetXXX() functions modify the
+ // unchanged, e.g. don't explicitly zero it): SetXXX() functions modify the
// object itself, GetXXX() ones return a new object.
// ------------------------------------------------------------------------
// because the holidays are different in different countries
bool IsWorkDay(Country country = Country_Default) 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 authority in
- // the matter. Besides, for some countries the exact date of
- // adoption of the Gregorian calendar is simply unknown.
- bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const;
-
// dos date and time format
// ------------------------------------------------------------------------
inline wxTimeSpan Subtract(const wxDateTime& dt) const;
inline wxTimeSpan operator-(const wxDateTime& dt2) const;
+ wxDateSpan DiffAsDateSpan(const wxDateTime& dt) const;
+
// conversion to/from text
// ------------------------------------------------------------------------
int GetYears() const { return m_years; }
// get number of months
int GetMonths() const { return m_months; }
+ // returns 12*GetYears() + GetMonths()
+ int GetTotalMonths() const { return 12*m_years + m_months; }
// get number of weeks
int GetWeeks() const { return m_weeks; }
// get number of days
#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400))
inline wxDateTime& wxDateTime::Set(time_t timet)
{
- // assign first to avoid long multiplication overflow!
- m_time = timet - WX_TIME_BASE_OFFSET ;
- m_time *= TIME_T_FACTOR;
+ if ( timet == (time_t)-1 )
+ {
+ m_time = wxInvalidDateTime.m_time;
+ }
+ else
+ {
+ // assign first to avoid long multiplication overflow!
+ m_time = timet - WX_TIME_BASE_OFFSET;
+ m_time *= TIME_T_FACTOR;
+ }
return *this;
}
projects / wxWidgets.git / blobdiff