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2328 lines
66 KiB
C++
2328 lines
66 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: src/common/datetime.cpp
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// Purpose: implementation of time/date related classes
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// (for formatting&parsing see datetimefmt.cpp)
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 11.05.99
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// Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// parts of code taken from sndcal library by Scott E. Lee:
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//
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// Copyright 1993-1995, Scott E. Lee, all rights reserved.
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// Permission granted to use, copy, modify, distribute and sell
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// so long as the above copyright and this permission statement
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// are retained in all copies.
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//
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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/*
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* Implementation notes:
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*
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* 1. the time is stored as a 64bit integer containing the signed number of
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* milliseconds since Jan 1. 1970 (the Unix Epoch) - so it is always
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* expressed in GMT.
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*
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* 2. the range is thus something about 580 million years, but due to current
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* algorithms limitations, only dates from Nov 24, 4714BC are handled
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*
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* 3. standard ANSI C functions are used to do time calculations whenever
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* possible, i.e. when the date is in the range Jan 1, 1970 to 2038
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*
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* 4. otherwise, the calculations are done by converting the date to/from JDN
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* first (the range limitation mentioned above comes from here: the
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* algorithm used by Scott E. Lee's code only works for positive JDNs, more
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* or less)
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*
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* 5. the object constructed for the given DD-MM-YYYY HH:MM:SS corresponds to
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* this moment in local time and may be converted to the object
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* corresponding to the same date/time in another time zone by using
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* ToTimezone()
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*
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* 6. the conversions to the current (or any other) timezone are done when the
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* internal time representation is converted to the broken-down one in
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* wxDateTime::Tm.
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*/
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if !defined(wxUSE_DATETIME) || wxUSE_DATETIME
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#ifndef WX_PRECOMP
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#ifdef __WINDOWS__
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#include "wx/msw/wrapwin.h"
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#endif
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#include "wx/string.h"
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#include "wx/log.h"
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#include "wx/intl.h"
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#include "wx/stopwatch.h" // for wxGetLocalTimeMillis()
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#include "wx/module.h"
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#include "wx/crt.h"
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#endif // WX_PRECOMP
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#include "wx/thread.h"
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#include "wx/time.h"
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#include "wx/tokenzr.h"
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#include <ctype.h>
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#ifdef __WINDOWS__
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#include <winnls.h>
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#ifndef __WXWINCE__
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#include <locale.h>
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#endif
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#endif
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#include "wx/datetime.h"
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// ----------------------------------------------------------------------------
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// wxXTI
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// ----------------------------------------------------------------------------
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#if wxUSE_EXTENDED_RTTI
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template<> void wxStringReadValue(const wxString &s , wxDateTime &data )
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{
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data.ParseFormat(s,"%Y-%m-%d %H:%M:%S", NULL);
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}
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template<> void wxStringWriteValue(wxString &s , const wxDateTime &data )
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{
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s = data.Format("%Y-%m-%d %H:%M:%S");
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}
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wxCUSTOM_TYPE_INFO(wxDateTime, wxToStringConverter<wxDateTime> , wxFromStringConverter<wxDateTime>)
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#endif // wxUSE_EXTENDED_RTTI
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// ----------------------------------------------------------------------------
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// macros
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// ----------------------------------------------------------------------------
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// debugging helper: just a convenient replacement of wxCHECK()
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#define wxDATETIME_CHECK(expr, msg) \
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wxCHECK2_MSG(expr, *this = wxInvalidDateTime; return *this, msg)
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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class wxDateTimeHolidaysModule : public wxModule
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{
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public:
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virtual bool OnInit()
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{
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wxDateTimeHolidayAuthority::AddAuthority(new wxDateTimeWorkDays);
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return true;
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}
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virtual void OnExit()
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{
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wxDateTimeHolidayAuthority::ClearAllAuthorities();
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wxDateTimeHolidayAuthority::ms_authorities.clear();
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}
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private:
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DECLARE_DYNAMIC_CLASS(wxDateTimeHolidaysModule)
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};
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IMPLEMENT_DYNAMIC_CLASS(wxDateTimeHolidaysModule, wxModule)
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// some trivial ones
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static const int MONTHS_IN_YEAR = 12;
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static const int SEC_PER_MIN = 60;
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static const int MIN_PER_HOUR = 60;
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static const long SECONDS_PER_DAY = 86400l;
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static const int DAYS_PER_WEEK = 7;
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static const long MILLISECONDS_PER_DAY = 86400000l;
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// this is the integral part of JDN of the midnight of Jan 1, 1970
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// (i.e. JDN(Jan 1, 1970) = 2440587.5)
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static const long EPOCH_JDN = 2440587l;
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// these values are only used in asserts so don't define them if asserts are
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// disabled to avoid warnings about unused static variables
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#if wxDEBUG_LEVEL
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// the date of JDN -0.5 (as we don't work with fractional parts, this is the
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// reference date for us) is Nov 24, 4714BC
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static const int JDN_0_YEAR = -4713;
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static const int JDN_0_MONTH = wxDateTime::Nov;
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static const int JDN_0_DAY = 24;
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#endif // wxDEBUG_LEVEL
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// the constants used for JDN calculations
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static const long JDN_OFFSET = 32046l;
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static const long DAYS_PER_5_MONTHS = 153l;
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static const long DAYS_PER_4_YEARS = 1461l;
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static const long DAYS_PER_400_YEARS = 146097l;
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// this array contains the cumulated number of days in all previous months for
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// normal and leap years
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static const wxDateTime::wxDateTime_t gs_cumulatedDays[2][MONTHS_IN_YEAR] =
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{
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 },
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }
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};
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const long wxDateTime::TIME_T_FACTOR = 1000l;
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// ----------------------------------------------------------------------------
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// global data
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// ----------------------------------------------------------------------------
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const char wxDefaultDateTimeFormat[] = "%c";
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const char wxDefaultTimeSpanFormat[] = "%H:%M:%S";
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// in the fine tradition of ANSI C we use our equivalent of (time_t)-1 to
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// indicate an invalid wxDateTime object
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const wxDateTime wxDefaultDateTime;
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wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown;
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// ----------------------------------------------------------------------------
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// private functions
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// ----------------------------------------------------------------------------
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// debugger helper: this function can be called from a debugger to show what
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// the date really is
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extern const char *wxDumpDate(const wxDateTime* dt)
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{
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static char buf[128];
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wxString fmt(dt->Format("%Y-%m-%d (%a) %H:%M:%S"));
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wxStrlcpy(buf,
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(fmt + " (" + dt->GetValue().ToString() + " ticks)").ToAscii(),
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WXSIZEOF(buf));
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return buf;
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}
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// get the number of days in the given month of the given year
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static inline
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wxDateTime::wxDateTime_t GetNumOfDaysInMonth(int year, wxDateTime::Month month)
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{
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// the number of days in month in Julian/Gregorian calendar: the first line
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// is for normal years, the second one is for the leap ones
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static const wxDateTime::wxDateTime_t daysInMonth[2][MONTHS_IN_YEAR] =
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{
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{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
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{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
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};
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return daysInMonth[wxDateTime::IsLeapYear(year)][month];
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}
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// return the integral part of the JDN for the midnight of the given date (to
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// get the real JDN you need to add 0.5, this is, in fact, JDN of the
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// noon of the previous day)
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static long GetTruncatedJDN(wxDateTime::wxDateTime_t day,
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wxDateTime::Month mon,
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int year)
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{
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// CREDIT: code below is by Scott E. Lee (but bugs are mine)
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// check the date validity
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wxASSERT_MSG(
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(year > JDN_0_YEAR) ||
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((year == JDN_0_YEAR) && (mon > JDN_0_MONTH)) ||
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((year == JDN_0_YEAR) && (mon == JDN_0_MONTH) && (day >= JDN_0_DAY)),
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wxT("date out of range - can't convert to JDN")
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);
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// make the year positive to avoid problems with negative numbers division
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year += 4800;
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// months are counted from March here
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int month;
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if ( mon >= wxDateTime::Mar )
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{
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month = mon - 2;
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}
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else
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{
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month = mon + 10;
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year--;
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}
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// now we can simply add all the contributions together
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return ((year / 100) * DAYS_PER_400_YEARS) / 4
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+ ((year % 100) * DAYS_PER_4_YEARS) / 4
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+ (month * DAYS_PER_5_MONTHS + 2) / 5
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+ day
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- JDN_OFFSET;
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}
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#ifdef wxHAS_STRFTIME
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// this function is a wrapper around strftime(3) adding error checking
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// NOTE: not static because used by datetimefmt.cpp
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wxString CallStrftime(const wxString& format, const tm* tm)
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{
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wxChar buf[4096];
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// Create temp wxString here to work around mingw/cygwin bug 1046059
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// http://sourceforge.net/tracker/?func=detail&atid=102435&aid=1046059&group_id=2435
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wxString s;
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if ( !wxStrftime(buf, WXSIZEOF(buf), format, tm) )
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{
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// There is one special case in which strftime() can return 0 without
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// indicating an error: "%p" may give empty string depending on the
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// locale, so check for it explicitly. Apparently it's really the only
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// exception.
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if ( format != wxS("%p") )
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{
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// if the format is valid, buffer must be too small?
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wxFAIL_MSG(wxT("strftime() failed"));
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}
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buf[0] = '\0';
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}
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s = buf;
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return s;
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}
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#endif // wxHAS_STRFTIME
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// if year and/or month have invalid values, replace them with the current ones
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static void ReplaceDefaultYearMonthWithCurrent(int *year,
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wxDateTime::Month *month)
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{
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struct tm *tmNow = NULL;
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struct tm tmstruct;
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if ( *year == wxDateTime::Inv_Year )
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{
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tmNow = wxDateTime::GetTmNow(&tmstruct);
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*year = 1900 + tmNow->tm_year;
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}
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if ( *month == wxDateTime::Inv_Month )
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{
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if ( !tmNow )
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tmNow = wxDateTime::GetTmNow(&tmstruct);
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*month = (wxDateTime::Month)tmNow->tm_mon;
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}
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}
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// fill the struct tm with default values
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// NOTE: not static because used by datetimefmt.cpp
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void InitTm(struct tm& tm)
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{
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// struct tm may have etxra fields (undocumented and with unportable
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// names) which, nevertheless, must be set to 0
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memset(&tm, 0, sizeof(struct tm));
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tm.tm_mday = 1; // mday 0 is invalid
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tm.tm_year = 76; // any valid year
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tm.tm_isdst = -1; // auto determine
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}
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// ============================================================================
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// implementation of wxDateTime
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// ============================================================================
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// ----------------------------------------------------------------------------
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// struct Tm
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// ----------------------------------------------------------------------------
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wxDateTime::Tm::Tm()
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{
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year = (wxDateTime_t)wxDateTime::Inv_Year;
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mon = wxDateTime::Inv_Month;
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mday =
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yday = 0;
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hour =
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min =
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sec =
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msec = 0;
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wday = wxDateTime::Inv_WeekDay;
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}
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wxDateTime::Tm::Tm(const struct tm& tm, const TimeZone& tz)
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: m_tz(tz)
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{
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msec = 0;
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sec = (wxDateTime::wxDateTime_t)tm.tm_sec;
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min = (wxDateTime::wxDateTime_t)tm.tm_min;
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hour = (wxDateTime::wxDateTime_t)tm.tm_hour;
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mday = (wxDateTime::wxDateTime_t)tm.tm_mday;
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mon = (wxDateTime::Month)tm.tm_mon;
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year = 1900 + tm.tm_year;
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wday = (wxDateTime::wxDateTime_t)tm.tm_wday;
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yday = (wxDateTime::wxDateTime_t)tm.tm_yday;
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}
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bool wxDateTime::Tm::IsValid() const
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{
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if ( mon == wxDateTime::Inv_Month )
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return false;
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// We need to check this here to avoid crashing in GetNumOfDaysInMonth() if
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// somebody passed us "(wxDateTime::Month)1000".
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wxCHECK_MSG( mon >= wxDateTime::Jan && mon < wxDateTime::Inv_Month, false,
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wxS("Invalid month value") );
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// we allow for the leap seconds, although we don't use them (yet)
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return (year != wxDateTime::Inv_Year) && (mon != wxDateTime::Inv_Month) &&
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(mday > 0 && mday <= GetNumOfDaysInMonth(year, mon)) &&
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(hour < 24) && (min < 60) && (sec < 62) && (msec < 1000);
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}
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void wxDateTime::Tm::ComputeWeekDay()
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{
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// compute the week day from day/month/year: we use the dumbest algorithm
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// possible: just compute our JDN and then use the (simple to derive)
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// formula: weekday = (JDN + 1.5) % 7
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wday = (wxDateTime::wxDateTime_t)((GetTruncatedJDN(mday, mon, year) + 2) % 7);
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}
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void wxDateTime::Tm::AddMonths(int monDiff)
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{
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// normalize the months field
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while ( monDiff < -mon )
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{
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year--;
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monDiff += MONTHS_IN_YEAR;
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}
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while ( monDiff + mon >= MONTHS_IN_YEAR )
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{
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year++;
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monDiff -= MONTHS_IN_YEAR;
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}
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mon = (wxDateTime::Month)(mon + monDiff);
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wxASSERT_MSG( mon >= 0 && mon < MONTHS_IN_YEAR, wxT("logic error") );
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// NB: we don't check here that the resulting date is valid, this function
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// is private and the caller must check it if needed
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}
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void wxDateTime::Tm::AddDays(int dayDiff)
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{
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// normalize the days field
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while ( dayDiff + mday < 1 )
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{
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AddMonths(-1);
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dayDiff += GetNumOfDaysInMonth(year, mon);
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}
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mday = (wxDateTime::wxDateTime_t)( mday + dayDiff );
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while ( mday > GetNumOfDaysInMonth(year, mon) )
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{
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mday -= GetNumOfDaysInMonth(year, mon);
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AddMonths(1);
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}
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wxASSERT_MSG( mday > 0 && mday <= GetNumOfDaysInMonth(year, mon),
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wxT("logic error") );
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}
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// ----------------------------------------------------------------------------
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// class TimeZone
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// ----------------------------------------------------------------------------
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wxDateTime::TimeZone::TimeZone(wxDateTime::TZ tz)
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{
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switch ( tz )
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{
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case wxDateTime::Local:
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// get the offset from C RTL: it returns the difference GMT-local
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// while we want to have the offset _from_ GMT, hence the '-'
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m_offset = -wxGetTimeZone();
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break;
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case wxDateTime::GMT_12:
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case wxDateTime::GMT_11:
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case wxDateTime::GMT_10:
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case wxDateTime::GMT_9:
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case wxDateTime::GMT_8:
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case wxDateTime::GMT_7:
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case wxDateTime::GMT_6:
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case wxDateTime::GMT_5:
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case wxDateTime::GMT_4:
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case wxDateTime::GMT_3:
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case wxDateTime::GMT_2:
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case wxDateTime::GMT_1:
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m_offset = -3600*(wxDateTime::GMT0 - tz);
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break;
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case wxDateTime::GMT0:
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case wxDateTime::GMT1:
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case wxDateTime::GMT2:
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case wxDateTime::GMT3:
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case wxDateTime::GMT4:
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case wxDateTime::GMT5:
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case wxDateTime::GMT6:
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case wxDateTime::GMT7:
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case wxDateTime::GMT8:
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case wxDateTime::GMT9:
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case wxDateTime::GMT10:
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case wxDateTime::GMT11:
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case wxDateTime::GMT12:
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case wxDateTime::GMT13:
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m_offset = 3600*(tz - wxDateTime::GMT0);
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break;
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case wxDateTime::A_CST:
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// Central Standard Time in use in Australia = UTC + 9.5
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m_offset = 60l*(9*MIN_PER_HOUR + MIN_PER_HOUR/2);
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break;
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default:
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wxFAIL_MSG( wxT("unknown time zone") );
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}
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}
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// ----------------------------------------------------------------------------
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// static functions
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// ----------------------------------------------------------------------------
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/* static */
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struct tm *wxDateTime::GetTmNow(struct tm *tmstruct)
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{
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time_t t = GetTimeNow();
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return wxLocaltime_r(&t, tmstruct);
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}
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/* static */
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bool wxDateTime::IsLeapYear(int year, wxDateTime::Calendar cal)
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{
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if ( year == Inv_Year )
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year = GetCurrentYear();
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if ( cal == Gregorian )
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{
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// in Gregorian calendar leap years are those divisible by 4 except
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// those divisible by 100 unless they're also divisible by 400
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// (in some countries, like Russia and Greece, additional corrections
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// exist, but they won't manifest themselves until 2700)
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return (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0));
|
|
}
|
|
else if ( cal == Julian )
|
|
{
|
|
// in Julian calendar the rule is simpler
|
|
return year % 4 == 0;
|
|
}
|
|
else
|
|
{
|
|
wxFAIL_MSG(wxT("unknown calendar"));
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
int wxDateTime::GetCentury(int year)
|
|
{
|
|
return year > 0 ? year / 100 : year / 100 - 1;
|
|
}
|
|
|
|
/* static */
|
|
int wxDateTime::ConvertYearToBC(int year)
|
|
{
|
|
// year 0 is BC 1
|
|
return year > 0 ? year : year - 1;
|
|
}
|
|
|
|
/* static */
|
|
int wxDateTime::GetCurrentYear(wxDateTime::Calendar cal)
|
|
{
|
|
switch ( cal )
|
|
{
|
|
case Gregorian:
|
|
return Now().GetYear();
|
|
|
|
case Julian:
|
|
wxFAIL_MSG(wxT("TODO"));
|
|
break;
|
|
|
|
default:
|
|
wxFAIL_MSG(wxT("unsupported calendar"));
|
|
break;
|
|
}
|
|
|
|
return Inv_Year;
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime::Month wxDateTime::GetCurrentMonth(wxDateTime::Calendar cal)
|
|
{
|
|
switch ( cal )
|
|
{
|
|
case Gregorian:
|
|
return Now().GetMonth();
|
|
|
|
case Julian:
|
|
wxFAIL_MSG(wxT("TODO"));
|
|
break;
|
|
|
|
default:
|
|
wxFAIL_MSG(wxT("unsupported calendar"));
|
|
break;
|
|
}
|
|
|
|
return Inv_Month;
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime::wxDateTime_t wxDateTime::GetNumberOfDays(int year, Calendar cal)
|
|
{
|
|
if ( year == Inv_Year )
|
|
{
|
|
// take the current year if none given
|
|
year = GetCurrentYear();
|
|
}
|
|
|
|
switch ( cal )
|
|
{
|
|
case Gregorian:
|
|
case Julian:
|
|
return IsLeapYear(year) ? 366 : 365;
|
|
|
|
default:
|
|
wxFAIL_MSG(wxT("unsupported calendar"));
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime::wxDateTime_t wxDateTime::GetNumberOfDays(wxDateTime::Month month,
|
|
int year,
|
|
wxDateTime::Calendar cal)
|
|
{
|
|
wxCHECK_MSG( month < MONTHS_IN_YEAR, 0, wxT("invalid month") );
|
|
|
|
if ( cal == Gregorian || cal == Julian )
|
|
{
|
|
if ( year == Inv_Year )
|
|
{
|
|
// take the current year if none given
|
|
year = GetCurrentYear();
|
|
}
|
|
|
|
return GetNumOfDaysInMonth(year, month);
|
|
}
|
|
else
|
|
{
|
|
wxFAIL_MSG(wxT("unsupported calendar"));
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
// helper function used by GetEnglish/WeekDayName(): returns 0 if flags is
|
|
// Name_Full and 1 if it is Name_Abbr or -1 if the flags is incorrect (and
|
|
// asserts in this case)
|
|
//
|
|
// the return value of this function is used as an index into 2D array
|
|
// containing full names in its first row and abbreviated ones in the 2nd one
|
|
int NameArrayIndexFromFlag(wxDateTime::NameFlags flags)
|
|
{
|
|
switch ( flags )
|
|
{
|
|
case wxDateTime::Name_Full:
|
|
return 0;
|
|
|
|
case wxDateTime::Name_Abbr:
|
|
return 1;
|
|
|
|
default:
|
|
wxFAIL_MSG( "unknown wxDateTime::NameFlags value" );
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
/* static */
|
|
wxString wxDateTime::GetEnglishMonthName(Month month, NameFlags flags)
|
|
{
|
|
wxCHECK_MSG( month != Inv_Month, wxEmptyString, "invalid month" );
|
|
|
|
static const char *const monthNames[2][MONTHS_IN_YEAR] =
|
|
{
|
|
{ "January", "February", "March", "April", "May", "June",
|
|
"July", "August", "September", "October", "November", "December" },
|
|
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }
|
|
};
|
|
|
|
const int idx = NameArrayIndexFromFlag(flags);
|
|
if ( idx == -1 )
|
|
return wxString();
|
|
|
|
return monthNames[idx][month];
|
|
}
|
|
|
|
/* static */
|
|
wxString wxDateTime::GetMonthName(wxDateTime::Month month,
|
|
wxDateTime::NameFlags flags)
|
|
{
|
|
#ifdef wxHAS_STRFTIME
|
|
wxCHECK_MSG( month != Inv_Month, wxEmptyString, wxT("invalid month") );
|
|
|
|
// notice that we must set all the fields to avoid confusing libc (GNU one
|
|
// gets confused to a crash if we don't do this)
|
|
tm tm;
|
|
InitTm(tm);
|
|
tm.tm_mon = month;
|
|
|
|
return CallStrftime(flags == Name_Abbr ? wxT("%b") : wxT("%B"), &tm);
|
|
#else // !wxHAS_STRFTIME
|
|
return GetEnglishMonthName(month, flags);
|
|
#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
|
|
}
|
|
|
|
/* static */
|
|
wxString wxDateTime::GetEnglishWeekDayName(WeekDay wday, NameFlags flags)
|
|
{
|
|
wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") );
|
|
|
|
static const char *const weekdayNames[2][DAYS_PER_WEEK] =
|
|
{
|
|
{ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
|
|
"Saturday" },
|
|
{ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" },
|
|
};
|
|
|
|
const int idx = NameArrayIndexFromFlag(flags);
|
|
if ( idx == -1 )
|
|
return wxString();
|
|
|
|
return weekdayNames[idx][wday];
|
|
}
|
|
|
|
/* static */
|
|
wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday,
|
|
wxDateTime::NameFlags flags)
|
|
{
|
|
#ifdef wxHAS_STRFTIME
|
|
wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") );
|
|
|
|
// take some arbitrary Sunday (but notice that the day should be such that
|
|
// after adding wday to it below we still have a valid date, e.g. don't
|
|
// take 28 here!)
|
|
tm tm;
|
|
InitTm(tm);
|
|
tm.tm_mday = 21;
|
|
tm.tm_mon = Nov;
|
|
tm.tm_year = 99;
|
|
|
|
// and offset it by the number of days needed to get the correct wday
|
|
tm.tm_mday += wday;
|
|
|
|
// call mktime() to normalize it...
|
|
(void)mktime(&tm);
|
|
|
|
// ... and call strftime()
|
|
return CallStrftime(flags == Name_Abbr ? wxT("%a") : wxT("%A"), &tm);
|
|
#else // !wxHAS_STRFTIME
|
|
return GetEnglishWeekDayName(wday, flags);
|
|
#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
|
|
}
|
|
|
|
/* static */
|
|
void wxDateTime::GetAmPmStrings(wxString *am, wxString *pm)
|
|
{
|
|
tm tm;
|
|
InitTm(tm);
|
|
wxChar buffer[64];
|
|
// @Note: Do not call 'CallStrftime' here! CallStrftime checks the return code
|
|
// and causes an assertion failed if the buffer is to small (which is good) - OR -
|
|
// if strftime does not return anything because the format string is invalid - OR -
|
|
// if there are no 'am' / 'pm' tokens defined for the current locale (which is not good).
|
|
// wxDateTime::ParseTime will try several different formats to parse the time.
|
|
// As a result, GetAmPmStrings might get called, even if the current locale
|
|
// does not define any 'am' / 'pm' tokens. In this case, wxStrftime would
|
|
// assert, even though it is a perfectly legal use.
|
|
if ( am )
|
|
{
|
|
if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0)
|
|
*am = wxString(buffer);
|
|
else
|
|
*am = wxString();
|
|
}
|
|
if ( pm )
|
|
{
|
|
tm.tm_hour = 13;
|
|
if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0)
|
|
*pm = wxString(buffer);
|
|
else
|
|
*pm = wxString();
|
|
}
|
|
}
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Country stuff: date calculations depend on the country (DST, work days,
|
|
// ...), so we need to know which rules to follow.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/* static */
|
|
wxDateTime::Country wxDateTime::GetCountry()
|
|
{
|
|
// TODO use LOCALE_ICOUNTRY setting under Win32
|
|
#ifndef __WXWINCE__
|
|
if ( ms_country == Country_Unknown )
|
|
{
|
|
// try to guess from the time zone name
|
|
time_t t = time(NULL);
|
|
struct tm tmstruct;
|
|
struct tm *tm = wxLocaltime_r(&t, &tmstruct);
|
|
|
|
wxString tz = CallStrftime(wxT("%Z"), tm);
|
|
if ( tz == wxT("WET") || tz == wxT("WEST") )
|
|
{
|
|
ms_country = UK;
|
|
}
|
|
else if ( tz == wxT("CET") || tz == wxT("CEST") )
|
|
{
|
|
ms_country = Country_EEC;
|
|
}
|
|
else if ( tz == wxT("MSK") || tz == wxT("MSD") )
|
|
{
|
|
ms_country = Russia;
|
|
}
|
|
else if ( tz == wxT("AST") || tz == wxT("ADT") ||
|
|
tz == wxT("EST") || tz == wxT("EDT") ||
|
|
tz == wxT("CST") || tz == wxT("CDT") ||
|
|
tz == wxT("MST") || tz == wxT("MDT") ||
|
|
tz == wxT("PST") || tz == wxT("PDT") )
|
|
{
|
|
ms_country = USA;
|
|
}
|
|
else
|
|
{
|
|
// well, choose a default one
|
|
ms_country = USA;
|
|
}
|
|
}
|
|
#else // __WXWINCE__
|
|
ms_country = USA;
|
|
#endif // !__WXWINCE__/__WXWINCE__
|
|
|
|
return ms_country;
|
|
}
|
|
|
|
/* static */
|
|
void wxDateTime::SetCountry(wxDateTime::Country country)
|
|
{
|
|
ms_country = country;
|
|
}
|
|
|
|
/* static */
|
|
bool wxDateTime::IsWestEuropeanCountry(Country country)
|
|
{
|
|
if ( country == Country_Default )
|
|
{
|
|
country = GetCountry();
|
|
}
|
|
|
|
return (Country_WesternEurope_Start <= country) &&
|
|
(country <= Country_WesternEurope_End);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// DST calculations: we use 3 different rules for the West European countries,
|
|
// USA and for the rest of the world. This is undoubtedly false for many
|
|
// countries, but I lack the necessary info (and the time to gather it),
|
|
// please add the other rules here!
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/* static */
|
|
bool wxDateTime::IsDSTApplicable(int year, Country country)
|
|
{
|
|
if ( year == Inv_Year )
|
|
{
|
|
// take the current year if none given
|
|
year = GetCurrentYear();
|
|
}
|
|
|
|
if ( country == Country_Default )
|
|
{
|
|
country = GetCountry();
|
|
}
|
|
|
|
switch ( country )
|
|
{
|
|
case USA:
|
|
case UK:
|
|
// DST was first observed in the US and UK during WWI, reused
|
|
// during WWII and used again since 1966
|
|
return year >= 1966 ||
|
|
(year >= 1942 && year <= 1945) ||
|
|
(year == 1918 || year == 1919);
|
|
|
|
default:
|
|
// assume that it started after WWII
|
|
return year > 1950;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime wxDateTime::GetBeginDST(int year, Country country)
|
|
{
|
|
if ( year == Inv_Year )
|
|
{
|
|
// take the current year if none given
|
|
year = GetCurrentYear();
|
|
}
|
|
|
|
if ( country == Country_Default )
|
|
{
|
|
country = GetCountry();
|
|
}
|
|
|
|
if ( !IsDSTApplicable(year, country) )
|
|
{
|
|
return wxInvalidDateTime;
|
|
}
|
|
|
|
wxDateTime dt;
|
|
|
|
if ( IsWestEuropeanCountry(country) || (country == Russia) )
|
|
{
|
|
// DST begins at 1 a.m. GMT on the last Sunday of March
|
|
if ( !dt.SetToLastWeekDay(Sun, Mar, year) )
|
|
{
|
|
// weird...
|
|
wxFAIL_MSG( wxT("no last Sunday in March?") );
|
|
}
|
|
|
|
dt += wxTimeSpan::Hours(1);
|
|
}
|
|
else switch ( country )
|
|
{
|
|
case USA:
|
|
switch ( year )
|
|
{
|
|
case 1918:
|
|
case 1919:
|
|
// don't know for sure - assume it was in effect all year
|
|
|
|
case 1943:
|
|
case 1944:
|
|
case 1945:
|
|
dt.Set(1, Jan, year);
|
|
break;
|
|
|
|
case 1942:
|
|
// DST was installed Feb 2, 1942 by the Congress
|
|
dt.Set(2, Feb, year);
|
|
break;
|
|
|
|
// Oil embargo changed the DST period in the US
|
|
case 1974:
|
|
dt.Set(6, Jan, 1974);
|
|
break;
|
|
|
|
case 1975:
|
|
dt.Set(23, Feb, 1975);
|
|
break;
|
|
|
|
default:
|
|
// before 1986, DST begun on the last Sunday of April, but
|
|
// in 1986 Reagan changed it to begin at 2 a.m. of the
|
|
// first Sunday in April
|
|
if ( year < 1986 )
|
|
{
|
|
if ( !dt.SetToLastWeekDay(Sun, Apr, year) )
|
|
{
|
|
// weird...
|
|
wxFAIL_MSG( wxT("no first Sunday in April?") );
|
|
}
|
|
}
|
|
else if ( year > 2006 )
|
|
// Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).
|
|
// Starting in 2007, daylight time begins in the United States on the
|
|
// second Sunday in March and ends on the first Sunday in November
|
|
{
|
|
if ( !dt.SetToWeekDay(Sun, 2, Mar, year) )
|
|
{
|
|
// weird...
|
|
wxFAIL_MSG( wxT("no second Sunday in March?") );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ( !dt.SetToWeekDay(Sun, 1, Apr, year) )
|
|
{
|
|
// weird...
|
|
wxFAIL_MSG( wxT("no first Sunday in April?") );
|
|
}
|
|
}
|
|
|
|
dt += wxTimeSpan::Hours(2);
|
|
|
|
// TODO what about timezone??
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
// assume Mar 30 as the start of the DST for the rest of the world
|
|
// - totally bogus, of course
|
|
dt.Set(30, Mar, year);
|
|
}
|
|
|
|
return dt;
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime wxDateTime::GetEndDST(int year, Country country)
|
|
{
|
|
if ( year == Inv_Year )
|
|
{
|
|
// take the current year if none given
|
|
year = GetCurrentYear();
|
|
}
|
|
|
|
if ( country == Country_Default )
|
|
{
|
|
country = GetCountry();
|
|
}
|
|
|
|
if ( !IsDSTApplicable(year, country) )
|
|
{
|
|
return wxInvalidDateTime;
|
|
}
|
|
|
|
wxDateTime dt;
|
|
|
|
if ( IsWestEuropeanCountry(country) || (country == Russia) )
|
|
{
|
|
// DST ends at 1 a.m. GMT on the last Sunday of October
|
|
if ( !dt.SetToLastWeekDay(Sun, Oct, year) )
|
|
{
|
|
// weirder and weirder...
|
|
wxFAIL_MSG( wxT("no last Sunday in October?") );
|
|
}
|
|
|
|
dt += wxTimeSpan::Hours(1);
|
|
}
|
|
else switch ( country )
|
|
{
|
|
case USA:
|
|
switch ( year )
|
|
{
|
|
case 1918:
|
|
case 1919:
|
|
// don't know for sure - assume it was in effect all year
|
|
|
|
case 1943:
|
|
case 1944:
|
|
dt.Set(31, Dec, year);
|
|
break;
|
|
|
|
case 1945:
|
|
// the time was reset after the end of the WWII
|
|
dt.Set(30, Sep, year);
|
|
break;
|
|
|
|
default: // default for switch (year)
|
|
if ( year > 2006 )
|
|
// Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).
|
|
// Starting in 2007, daylight time begins in the United States on the
|
|
// second Sunday in March and ends on the first Sunday in November
|
|
{
|
|
if ( !dt.SetToWeekDay(Sun, 1, Nov, year) )
|
|
{
|
|
// weird...
|
|
wxFAIL_MSG( wxT("no first Sunday in November?") );
|
|
}
|
|
}
|
|
else
|
|
// pre-2007
|
|
// DST ends at 2 a.m. on the last Sunday of October
|
|
{
|
|
if ( !dt.SetToLastWeekDay(Sun, Oct, year) )
|
|
{
|
|
// weirder and weirder...
|
|
wxFAIL_MSG( wxT("no last Sunday in October?") );
|
|
}
|
|
}
|
|
|
|
dt += wxTimeSpan::Hours(2);
|
|
|
|
// TODO: what about timezone??
|
|
}
|
|
break;
|
|
|
|
default: // default for switch (country)
|
|
// assume October 26th as the end of the DST - totally bogus too
|
|
dt.Set(26, Oct, year);
|
|
}
|
|
|
|
return dt;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// constructors and assignment operators
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// return the current time with ms precision
|
|
/* static */ wxDateTime wxDateTime::UNow()
|
|
{
|
|
return wxDateTime(wxGetUTCTimeMillis());
|
|
}
|
|
|
|
// the values in the tm structure contain the local time
|
|
wxDateTime& wxDateTime::Set(const struct tm& tm)
|
|
{
|
|
struct tm tm2(tm);
|
|
time_t timet = mktime(&tm2);
|
|
|
|
if ( timet == (time_t)-1 )
|
|
{
|
|
// mktime() rather unintuitively fails for Jan 1, 1970 if the hour is
|
|
// less than timezone - try to make it work for this case
|
|
if ( tm2.tm_year == 70 && tm2.tm_mon == 0 && tm2.tm_mday == 1 )
|
|
{
|
|
return Set((time_t)(
|
|
wxGetTimeZone() +
|
|
tm2.tm_hour * MIN_PER_HOUR * SEC_PER_MIN +
|
|
tm2.tm_min * SEC_PER_MIN +
|
|
tm2.tm_sec));
|
|
}
|
|
|
|
wxFAIL_MSG( wxT("mktime() failed") );
|
|
|
|
*this = wxInvalidDateTime;
|
|
|
|
return *this;
|
|
}
|
|
|
|
// mktime() only adjusts tm_wday, tm_yday and tm_isdst fields normally, if
|
|
// it changed anything else, it must have performed the DST adjustment. But
|
|
// the trouble with this is that different implementations do it
|
|
// differently, e.g. GNU libc moves the time forward if the specified time
|
|
// is invalid in the local time zone, while MSVC CRT moves it backwards
|
|
// which is especially pernicious as it can change the date if the DST
|
|
// starts at midnight, as it does in some time zones (see #15419), and this
|
|
// is completely unexpected for the code working with dates only.
|
|
//
|
|
// So standardize on moving the time forwards to have consistent behaviour
|
|
// under all platforms and to avoid the problem above.
|
|
if ( tm2.tm_hour != tm.tm_hour )
|
|
{
|
|
tm2 = tm;
|
|
tm2.tm_hour++;
|
|
if ( tm2.tm_hour == 24 )
|
|
{
|
|
// This shouldn't normally happen as the DST never starts at 23:00
|
|
// but if it does, we have a problem as we need to adjust the day
|
|
// as well. However we stop here, i.e. we don't adjust the month
|
|
// (or the year) because mktime() is supposed to take care of this
|
|
// for us.
|
|
tm2.tm_hour = 0;
|
|
tm2.tm_mday++;
|
|
}
|
|
|
|
timet = mktime(&tm2);
|
|
}
|
|
|
|
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
|
|
wxDATETIME_CHECK( hour < 24 &&
|
|
second < 62 &&
|
|
minute < 60 &&
|
|
millisec < 1000,
|
|
wxT("Invalid time in wxDateTime::Set()") );
|
|
|
|
// get the current date from system
|
|
struct tm tmstruct;
|
|
struct tm *tm = GetTmNow(&tmstruct);
|
|
|
|
wxDATETIME_CHECK( tm, wxT("wxLocaltime_r() failed") );
|
|
|
|
// make a copy so it isn't clobbered by the call to mktime() below
|
|
struct tm tm1(*tm);
|
|
|
|
// adjust the time
|
|
tm1.tm_hour = hour;
|
|
tm1.tm_min = minute;
|
|
tm1.tm_sec = second;
|
|
|
|
// and the DST in case it changes on this date
|
|
struct tm tm2(tm1);
|
|
mktime(&tm2);
|
|
if ( tm2.tm_isdst != tm1.tm_isdst )
|
|
tm1.tm_isdst = tm2.tm_isdst;
|
|
|
|
(void)Set(tm1);
|
|
|
|
// 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)
|
|
{
|
|
wxDATETIME_CHECK( hour < 24 &&
|
|
second < 62 &&
|
|
minute < 60 &&
|
|
millisec < 1000,
|
|
wxT("Invalid time in wxDateTime::Set()") );
|
|
|
|
ReplaceDefaultYearMonthWithCurrent(&year, &month);
|
|
|
|
wxDATETIME_CHECK( (0 < day) && (day <= GetNumberOfDays(month, year)),
|
|
wxT("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 >= yearMinInRange && year <= yearMaxInRange )
|
|
{
|
|
// use the standard library version if the date is in range - this is
|
|
// probably more efficient than our code
|
|
struct tm tm;
|
|
tm.tm_year = year - 1900;
|
|
tm.tm_mon = month;
|
|
tm.tm_mday = day;
|
|
tm.tm_hour = hour;
|
|
tm.tm_min = minute;
|
|
tm.tm_sec = second;
|
|
tm.tm_isdst = -1; // mktime() will guess it
|
|
|
|
(void)Set(tm);
|
|
|
|
// and finally adjust milliseconds
|
|
if (IsValid())
|
|
SetMillisecond(millisec);
|
|
|
|
return *this;
|
|
}
|
|
else
|
|
{
|
|
// do time calculations ourselves: we want to calculate the number of
|
|
// milliseconds between the given date and the epoch
|
|
|
|
// get the JDN for the midnight of this day
|
|
m_time = GetTruncatedJDN(day, month, year);
|
|
m_time -= EPOCH_JDN;
|
|
m_time *= SECONDS_PER_DAY * TIME_T_FACTOR;
|
|
|
|
// JDN corresponds to GMT, we take localtime
|
|
Add(wxTimeSpan(hour, minute, second + wxGetTimeZone(), millisec));
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::Set(double jdn)
|
|
{
|
|
// so that m_time will be 0 for the midnight of Jan 1, 1970 which is jdn
|
|
// EPOCH_JDN + 0.5
|
|
jdn -= EPOCH_JDN + 0.5;
|
|
|
|
m_time.Assign(jdn*MILLISECONDS_PER_DAY);
|
|
|
|
// JDNs always are in UTC, so we don't need any adjustments for time zone
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::ResetTime()
|
|
{
|
|
Tm tm = GetTm();
|
|
|
|
if ( tm.hour || tm.min || tm.sec || tm.msec )
|
|
{
|
|
tm.msec =
|
|
tm.sec =
|
|
tm.min =
|
|
tm.hour = 0;
|
|
|
|
Set(tm);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime wxDateTime::GetDateOnly() const
|
|
{
|
|
Tm tm = GetTm();
|
|
tm.msec =
|
|
tm.sec =
|
|
tm.min =
|
|
tm.hour = 0;
|
|
return wxDateTime(tm);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// DOS Date and Time Format functions
|
|
// ----------------------------------------------------------------------------
|
|
// the dos date and time value is an unsigned 32 bit value in the format:
|
|
// YYYYYYYMMMMDDDDDhhhhhmmmmmmsssss
|
|
//
|
|
// Y = year offset from 1980 (0-127)
|
|
// M = month (1-12)
|
|
// D = day of month (1-31)
|
|
// h = hour (0-23)
|
|
// m = minute (0-59)
|
|
// s = bisecond (0-29) each bisecond indicates two seconds
|
|
// ----------------------------------------------------------------------------
|
|
|
|
wxDateTime& wxDateTime::SetFromDOS(unsigned long ddt)
|
|
{
|
|
struct tm tm;
|
|
InitTm(tm);
|
|
|
|
long year = ddt & 0xFE000000;
|
|
year >>= 25;
|
|
year += 80;
|
|
tm.tm_year = year;
|
|
|
|
long month = ddt & 0x1E00000;
|
|
month >>= 21;
|
|
month -= 1;
|
|
tm.tm_mon = month;
|
|
|
|
long day = ddt & 0x1F0000;
|
|
day >>= 16;
|
|
tm.tm_mday = day;
|
|
|
|
long hour = ddt & 0xF800;
|
|
hour >>= 11;
|
|
tm.tm_hour = hour;
|
|
|
|
long minute = ddt & 0x7E0;
|
|
minute >>= 5;
|
|
tm.tm_min = minute;
|
|
|
|
long second = ddt & 0x1F;
|
|
tm.tm_sec = second * 2;
|
|
|
|
return Set(mktime(&tm));
|
|
}
|
|
|
|
unsigned long wxDateTime::GetAsDOS() const
|
|
{
|
|
unsigned long ddt;
|
|
time_t ticks = GetTicks();
|
|
struct tm tmstruct;
|
|
struct tm *tm = wxLocaltime_r(&ticks, &tmstruct);
|
|
wxCHECK_MSG( tm, ULONG_MAX, wxT("time can't be represented in DOS format") );
|
|
|
|
long year = tm->tm_year;
|
|
year -= 80;
|
|
year <<= 25;
|
|
|
|
long month = tm->tm_mon;
|
|
month += 1;
|
|
month <<= 21;
|
|
|
|
long day = tm->tm_mday;
|
|
day <<= 16;
|
|
|
|
long hour = tm->tm_hour;
|
|
hour <<= 11;
|
|
|
|
long minute = tm->tm_min;
|
|
minute <<= 5;
|
|
|
|
long second = tm->tm_sec;
|
|
second /= 2;
|
|
|
|
ddt = year | month | day | hour | minute | second;
|
|
return ddt;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// time_t <-> broken down time conversions
|
|
// ----------------------------------------------------------------------------
|
|
|
|
wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
time_t time = GetTicks();
|
|
if ( time != (time_t)-1 )
|
|
{
|
|
// use C RTL functions
|
|
struct tm tmstruct;
|
|
tm *tm;
|
|
if ( tz.GetOffset() == -wxGetTimeZone() )
|
|
{
|
|
// we are working with local time
|
|
tm = wxLocaltime_r(&time, &tmstruct);
|
|
|
|
// should never happen
|
|
wxCHECK_MSG( tm, Tm(), wxT("wxLocaltime_r() failed") );
|
|
}
|
|
else
|
|
{
|
|
time += (time_t)tz.GetOffset();
|
|
#if defined(__VMS__) || defined(__WATCOMC__) // time is unsigned so avoid warning
|
|
int time2 = (int) time;
|
|
if ( time2 >= 0 )
|
|
#else
|
|
if ( time >= 0 )
|
|
#endif
|
|
{
|
|
tm = wxGmtime_r(&time, &tmstruct);
|
|
|
|
// should never happen
|
|
wxCHECK_MSG( tm, Tm(), wxT("wxGmtime_r() failed") );
|
|
}
|
|
else
|
|
{
|
|
tm = (struct tm *)NULL;
|
|
}
|
|
}
|
|
|
|
if ( tm )
|
|
{
|
|
// adjust the milliseconds
|
|
Tm tm2(*tm, tz);
|
|
long timeOnly = (m_time % MILLISECONDS_PER_DAY).ToLong();
|
|
tm2.msec = (wxDateTime_t)(timeOnly % 1000);
|
|
return tm2;
|
|
}
|
|
//else: use generic code below
|
|
}
|
|
|
|
// remember the time and do the calculations with the date only - this
|
|
// eliminates rounding errors of the floating point arithmetics
|
|
|
|
wxLongLong timeMidnight = m_time + tz.GetOffset() * 1000;
|
|
|
|
long timeOnly = (timeMidnight % MILLISECONDS_PER_DAY).ToLong();
|
|
|
|
// we want to always have positive time and timeMidnight to be really
|
|
// the midnight before it
|
|
if ( timeOnly < 0 )
|
|
{
|
|
timeOnly = MILLISECONDS_PER_DAY + timeOnly;
|
|
}
|
|
|
|
timeMidnight -= timeOnly;
|
|
|
|
// calculate the Gregorian date from JDN for the midnight of our date:
|
|
// this will yield day, month (in 1..12 range) and year
|
|
|
|
// actually, this is the JDN for the noon of the previous day
|
|
long jdn = (timeMidnight / MILLISECONDS_PER_DAY).ToLong() + EPOCH_JDN;
|
|
|
|
// CREDIT: code below is by Scott E. Lee (but bugs are mine)
|
|
|
|
wxASSERT_MSG( jdn > -2, wxT("JDN out of range") );
|
|
|
|
// calculate the century
|
|
long temp = (jdn + JDN_OFFSET) * 4 - 1;
|
|
long century = temp / DAYS_PER_400_YEARS;
|
|
|
|
// then the year and day of year (1 <= dayOfYear <= 366)
|
|
temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
|
|
long year = (century * 100) + (temp / DAYS_PER_4_YEARS);
|
|
long dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1;
|
|
|
|
// and finally the month and day of the month
|
|
temp = dayOfYear * 5 - 3;
|
|
long month = temp / DAYS_PER_5_MONTHS;
|
|
long day = (temp % DAYS_PER_5_MONTHS) / 5 + 1;
|
|
|
|
// month is counted from March - convert to normal
|
|
if ( month < 10 )
|
|
{
|
|
month += 3;
|
|
}
|
|
else
|
|
{
|
|
year += 1;
|
|
month -= 9;
|
|
}
|
|
|
|
// year is offset by 4800
|
|
year -= 4800;
|
|
|
|
// check that the algorithm gave us something reasonable
|
|
wxASSERT_MSG( (0 < month) && (month <= 12), wxT("invalid month") );
|
|
wxASSERT_MSG( (1 <= day) && (day < 32), wxT("invalid day") );
|
|
|
|
// construct Tm from these values
|
|
Tm tm;
|
|
tm.year = (int)year;
|
|
tm.yday = (wxDateTime_t)(dayOfYear - 1); // use C convention for day number
|
|
tm.mon = (Month)(month - 1); // algorithm yields 1 for January, not 0
|
|
tm.mday = (wxDateTime_t)day;
|
|
tm.msec = (wxDateTime_t)(timeOnly % 1000);
|
|
timeOnly -= tm.msec;
|
|
timeOnly /= 1000; // now we have time in seconds
|
|
|
|
tm.sec = (wxDateTime_t)(timeOnly % SEC_PER_MIN);
|
|
timeOnly -= tm.sec;
|
|
timeOnly /= SEC_PER_MIN; // now we have time in minutes
|
|
|
|
tm.min = (wxDateTime_t)(timeOnly % MIN_PER_HOUR);
|
|
timeOnly -= tm.min;
|
|
|
|
tm.hour = (wxDateTime_t)(timeOnly / MIN_PER_HOUR);
|
|
|
|
return tm;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetYear(int year)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.year = year;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetMonth(Month month)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.mon = month;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetDay(wxDateTime_t mday)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.mday = mday;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetHour(wxDateTime_t hour)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.hour = hour;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetMinute(wxDateTime_t min)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.min = min;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetSecond(wxDateTime_t sec)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
Tm tm(GetTm());
|
|
tm.sec = sec;
|
|
Set(tm);
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetMillisecond(wxDateTime_t millisecond)
|
|
{
|
|
wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
|
|
|
|
// we don't need to use GetTm() for this one
|
|
m_time -= m_time % 1000l;
|
|
m_time += millisecond;
|
|
|
|
return *this;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxDateTime arithmetics
|
|
// ----------------------------------------------------------------------------
|
|
|
|
wxDateTime& wxDateTime::Add(const wxDateSpan& diff)
|
|
{
|
|
Tm tm(GetTm());
|
|
|
|
tm.year += diff.GetYears();
|
|
tm.AddMonths(diff.GetMonths());
|
|
|
|
// check that the resulting date is valid
|
|
if ( tm.mday > GetNumOfDaysInMonth(tm.year, tm.mon) )
|
|
{
|
|
// We suppose that when adding one month to Jan 31 we want to get Feb
|
|
// 28 (or 29), i.e. adding a month to the last day of the month should
|
|
// give the last day of the next month which is quite logical.
|
|
//
|
|
// Unfortunately, there is no logic way to understand what should
|
|
// Jan 30 + 1 month be - Feb 28 too or Feb 27 (assuming non leap year)?
|
|
// We make it Feb 28 (last day too), but it is highly questionable.
|
|
tm.mday = GetNumOfDaysInMonth(tm.year, tm.mon);
|
|
}
|
|
|
|
tm.AddDays(diff.GetTotalDays());
|
|
|
|
Set(tm);
|
|
|
|
wxASSERT_MSG( IsSameTime(tm),
|
|
wxT("Add(wxDateSpan) shouldn't modify time") );
|
|
|
|
return *this;
|
|
}
|
|
|
|
wxDateSpan wxDateTime::DiffAsDateSpan(const wxDateTime& dt) const
|
|
{
|
|
wxASSERT_MSG( IsValid() && dt.IsValid(), wxT("invalid wxDateTime"));
|
|
|
|
// If dt is larger than this, calculations below needs to be inverted.
|
|
int inv = 1;
|
|
if ( dt > *this )
|
|
inv = -1;
|
|
|
|
int y = GetYear() - dt.GetYear();
|
|
int m = GetMonth() - dt.GetMonth();
|
|
int d = GetDay() - dt.GetDay();
|
|
|
|
// If month diff is negative, dt is the year before, so decrease year
|
|
// and set month diff to its inverse, e.g. January - December should be 1,
|
|
// not -11.
|
|
if ( m * inv < 0 || (m == 0 && d * inv < 0))
|
|
{
|
|
m += inv * MONTHS_IN_YEAR;
|
|
y -= inv;
|
|
}
|
|
|
|
// Same logic for days as for months above.
|
|
if ( d * inv < 0 )
|
|
{
|
|
// Use number of days in month from the month which end date we're
|
|
// crossing. That is month before this for positive diff, and this
|
|
// month for negative diff.
|
|
// If we're on january and using previous month, we get december
|
|
// previous year, but don't care, december has same amount of days
|
|
// every year.
|
|
wxDateTime::Month monthfordays = GetMonth();
|
|
if (inv > 0 && monthfordays == wxDateTime::Jan)
|
|
monthfordays = wxDateTime::Dec;
|
|
else if (inv > 0)
|
|
monthfordays = static_cast<wxDateTime::Month>(monthfordays - 1);
|
|
|
|
d += inv * wxDateTime::GetNumberOfDays(monthfordays, GetYear());
|
|
m -= inv;
|
|
}
|
|
|
|
int w = d / DAYS_PER_WEEK;
|
|
|
|
// Remove weeks from d, since wxDateSpan only keep days as the ones
|
|
// not in complete weeks
|
|
d -= w * DAYS_PER_WEEK;
|
|
|
|
return wxDateSpan(y, m, w, d);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Weekday and monthday stuff
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// convert Sun, Mon, ..., Sat into 6, 0, ..., 5
|
|
static inline int ConvertWeekDayToMondayBase(int wd)
|
|
{
|
|
return wd == wxDateTime::Sun ? 6 : wd - 1;
|
|
}
|
|
|
|
/* static */
|
|
wxDateTime
|
|
wxDateTime::SetToWeekOfYear(int year, wxDateTime_t numWeek, WeekDay wd)
|
|
{
|
|
wxASSERT_MSG( numWeek > 0,
|
|
wxT("invalid week number: weeks are counted from 1") );
|
|
|
|
// Jan 4 always lies in the 1st week of the year
|
|
wxDateTime dt(4, Jan, year);
|
|
dt.SetToWeekDayInSameWeek(wd);
|
|
dt += wxDateSpan::Weeks(numWeek - 1);
|
|
|
|
return dt;
|
|
}
|
|
|
|
#if WXWIN_COMPATIBILITY_2_6
|
|
// use a separate function to avoid warnings about using deprecated
|
|
// SetToTheWeek in GetWeek below
|
|
static wxDateTime
|
|
SetToTheWeek(int year,
|
|
wxDateTime::wxDateTime_t numWeek,
|
|
wxDateTime::WeekDay weekday,
|
|
wxDateTime::WeekFlags flags)
|
|
{
|
|
// Jan 4 always lies in the 1st week of the year
|
|
wxDateTime dt(4, wxDateTime::Jan, year);
|
|
dt.SetToWeekDayInSameWeek(weekday, flags);
|
|
dt += wxDateSpan::Weeks(numWeek - 1);
|
|
|
|
return dt;
|
|
}
|
|
|
|
bool wxDateTime::SetToTheWeek(wxDateTime_t numWeek,
|
|
WeekDay weekday,
|
|
WeekFlags flags)
|
|
{
|
|
int year = GetYear();
|
|
*this = ::SetToTheWeek(year, numWeek, weekday, flags);
|
|
if ( GetYear() != year )
|
|
{
|
|
// oops... numWeek was too big
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
wxDateTime wxDateTime::GetWeek(wxDateTime_t numWeek,
|
|
WeekDay weekday,
|
|
WeekFlags flags) const
|
|
{
|
|
return ::SetToTheWeek(GetYear(), numWeek, weekday, flags);
|
|
}
|
|
#endif // WXWIN_COMPATIBILITY_2_6
|
|
|
|
wxDateTime& wxDateTime::SetToLastMonthDay(Month month,
|
|
int year)
|
|
{
|
|
// take the current month/year if none specified
|
|
if ( year == Inv_Year )
|
|
year = GetYear();
|
|
if ( month == Inv_Month )
|
|
month = GetMonth();
|
|
|
|
return Set(GetNumOfDaysInMonth(year, month), month, year);
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetToWeekDayInSameWeek(WeekDay weekday, WeekFlags flags)
|
|
{
|
|
wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
|
|
|
|
int wdayDst = weekday,
|
|
wdayThis = GetWeekDay();
|
|
if ( wdayDst == wdayThis )
|
|
{
|
|
// nothing to do
|
|
return *this;
|
|
}
|
|
|
|
if ( flags == Default_First )
|
|
{
|
|
flags = GetCountry() == USA ? Sunday_First : Monday_First;
|
|
}
|
|
|
|
// the logic below based on comparing weekday and wdayThis works if Sun (0)
|
|
// is the first day in the week, but breaks down for Monday_First case so
|
|
// we adjust the week days in this case
|
|
if ( flags == Monday_First )
|
|
{
|
|
if ( wdayThis == Sun )
|
|
wdayThis += 7;
|
|
if ( wdayDst == Sun )
|
|
wdayDst += 7;
|
|
}
|
|
//else: Sunday_First, nothing to do
|
|
|
|
// go forward or back in time to the day we want
|
|
if ( wdayDst < wdayThis )
|
|
{
|
|
return Subtract(wxDateSpan::Days(wdayThis - wdayDst));
|
|
}
|
|
else // weekday > wdayThis
|
|
{
|
|
return Add(wxDateSpan::Days(wdayDst - wdayThis));
|
|
}
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetToNextWeekDay(WeekDay weekday)
|
|
{
|
|
wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
|
|
|
|
int diff;
|
|
WeekDay wdayThis = GetWeekDay();
|
|
if ( weekday == wdayThis )
|
|
{
|
|
// nothing to do
|
|
return *this;
|
|
}
|
|
else if ( weekday < wdayThis )
|
|
{
|
|
// need to advance a week
|
|
diff = 7 - (wdayThis - weekday);
|
|
}
|
|
else // weekday > wdayThis
|
|
{
|
|
diff = weekday - wdayThis;
|
|
}
|
|
|
|
return Add(wxDateSpan::Days(diff));
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetToPrevWeekDay(WeekDay weekday)
|
|
{
|
|
wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
|
|
|
|
int diff;
|
|
WeekDay wdayThis = GetWeekDay();
|
|
if ( weekday == wdayThis )
|
|
{
|
|
// nothing to do
|
|
return *this;
|
|
}
|
|
else if ( weekday > wdayThis )
|
|
{
|
|
// need to go to previous week
|
|
diff = 7 - (weekday - wdayThis);
|
|
}
|
|
else // weekday < wdayThis
|
|
{
|
|
diff = wdayThis - weekday;
|
|
}
|
|
|
|
return Subtract(wxDateSpan::Days(diff));
|
|
}
|
|
|
|
bool wxDateTime::SetToWeekDay(WeekDay weekday,
|
|
int n,
|
|
Month month,
|
|
int year)
|
|
{
|
|
wxCHECK_MSG( weekday != Inv_WeekDay, false, wxT("invalid weekday") );
|
|
|
|
// we don't check explicitly that -5 <= n <= 5 because we will return false
|
|
// anyhow in such case - but may be should still give an assert for it?
|
|
|
|
// take the current month/year if none specified
|
|
ReplaceDefaultYearMonthWithCurrent(&year, &month);
|
|
|
|
wxDateTime dt;
|
|
|
|
// TODO this probably could be optimised somehow...
|
|
|
|
if ( n > 0 )
|
|
{
|
|
// get the first day of the month
|
|
dt.Set(1, month, year);
|
|
|
|
// get its wday
|
|
WeekDay wdayFirst = dt.GetWeekDay();
|
|
|
|
// go to the first weekday of the month
|
|
int diff = weekday - wdayFirst;
|
|
if ( diff < 0 )
|
|
diff += 7;
|
|
|
|
// add advance n-1 weeks more
|
|
diff += 7*(n - 1);
|
|
|
|
dt += wxDateSpan::Days(diff);
|
|
}
|
|
else // count from the end of the month
|
|
{
|
|
// get the last day of the month
|
|
dt.SetToLastMonthDay(month, year);
|
|
|
|
// get its wday
|
|
WeekDay wdayLast = dt.GetWeekDay();
|
|
|
|
// go to the last weekday of the month
|
|
int diff = wdayLast - weekday;
|
|
if ( diff < 0 )
|
|
diff += 7;
|
|
|
|
// and rewind n-1 weeks from there
|
|
diff += 7*(-n - 1);
|
|
|
|
dt -= wxDateSpan::Days(diff);
|
|
}
|
|
|
|
// check that it is still in the same month
|
|
if ( dt.GetMonth() == month )
|
|
{
|
|
*this = dt;
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
// no such day in this month
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static inline
|
|
wxDateTime::wxDateTime_t GetDayOfYearFromTm(const wxDateTime::Tm& tm)
|
|
{
|
|
return (wxDateTime::wxDateTime_t)(gs_cumulatedDays[wxDateTime::IsLeapYear(tm.year)][tm.mon] + tm.mday);
|
|
}
|
|
|
|
wxDateTime::wxDateTime_t wxDateTime::GetDayOfYear(const TimeZone& tz) const
|
|
{
|
|
return GetDayOfYearFromTm(GetTm(tz));
|
|
}
|
|
|
|
wxDateTime::wxDateTime_t
|
|
wxDateTime::GetWeekOfYear(wxDateTime::WeekFlags flags, const TimeZone& tz) const
|
|
{
|
|
if ( flags == Default_First )
|
|
{
|
|
flags = GetCountry() == USA ? Sunday_First : Monday_First;
|
|
}
|
|
|
|
Tm tm(GetTm(tz));
|
|
wxDateTime_t nDayInYear = GetDayOfYearFromTm(tm);
|
|
|
|
int wdTarget = GetWeekDay(tz);
|
|
int wdYearStart = wxDateTime(1, Jan, GetYear()).GetWeekDay();
|
|
int week;
|
|
if ( flags == Sunday_First )
|
|
{
|
|
// FIXME: First week is not calculated correctly.
|
|
week = (nDayInYear - wdTarget + 7) / 7;
|
|
if ( wdYearStart == Wed || wdYearStart == Thu )
|
|
week++;
|
|
}
|
|
else // week starts with monday
|
|
{
|
|
// adjust the weekdays to non-US style.
|
|
wdYearStart = ConvertWeekDayToMondayBase(wdYearStart);
|
|
|
|
// quoting from http://www.cl.cam.ac.uk/~mgk25/iso-time.html:
|
|
//
|
|
// Week 01 of a year is per definition the first week that has the
|
|
// Thursday in this year, which is equivalent to the week that
|
|
// contains the fourth day of January. In other words, the first
|
|
// week of a new year is the week that has the majority of its
|
|
// days in the new year. Week 01 might also contain days from the
|
|
// previous year and the week before week 01 of a year is the last
|
|
// week (52 or 53) of the previous year even if it contains days
|
|
// from the new year. A week starts with Monday (day 1) and ends
|
|
// with Sunday (day 7).
|
|
//
|
|
|
|
// if Jan 1 is Thursday or less, it is in the first week of this year
|
|
int dayCountFix = wdYearStart < 4 ? 6 : -1;
|
|
|
|
// count the number of week
|
|
week = (nDayInYear + wdYearStart + dayCountFix) / DAYS_PER_WEEK;
|
|
|
|
// check if we happen to be at the last week of previous year:
|
|
if ( week == 0 )
|
|
{
|
|
week = wxDateTime(31, Dec, GetYear() - 1).GetWeekOfYear();
|
|
}
|
|
else if ( week == 53 )
|
|
{
|
|
int wdYearEnd = (wdYearStart + 364 + IsLeapYear(GetYear()))
|
|
% DAYS_PER_WEEK;
|
|
|
|
// Week 53 only if last day of year is Thursday or later.
|
|
if ( wdYearEnd < 3 )
|
|
week = 1;
|
|
}
|
|
}
|
|
|
|
return (wxDateTime::wxDateTime_t)week;
|
|
}
|
|
|
|
wxDateTime::wxDateTime_t wxDateTime::GetWeekOfMonth(wxDateTime::WeekFlags flags,
|
|
const TimeZone& tz) const
|
|
{
|
|
Tm tm = GetTm(tz);
|
|
const wxDateTime dateFirst = wxDateTime(1, tm.mon, tm.year);
|
|
const wxDateTime::WeekDay wdFirst = dateFirst.GetWeekDay();
|
|
|
|
if ( flags == Default_First )
|
|
{
|
|
flags = GetCountry() == USA ? Sunday_First : Monday_First;
|
|
}
|
|
|
|
// compute offset of dateFirst from the beginning of the week
|
|
int firstOffset;
|
|
if ( flags == Sunday_First )
|
|
firstOffset = wdFirst - Sun;
|
|
else
|
|
firstOffset = wdFirst == Sun ? DAYS_PER_WEEK - 1 : wdFirst - Mon;
|
|
|
|
return (wxDateTime::wxDateTime_t)((tm.mday - 1 + firstOffset)/7 + 1);
|
|
}
|
|
|
|
wxDateTime& wxDateTime::SetToYearDay(wxDateTime::wxDateTime_t yday)
|
|
{
|
|
int year = GetYear();
|
|
wxDATETIME_CHECK( (0 < yday) && (yday <= GetNumberOfDays(year)),
|
|
wxT("invalid year day") );
|
|
|
|
bool isLeap = IsLeapYear(year);
|
|
for ( Month mon = Jan; mon < Inv_Month; wxNextMonth(mon) )
|
|
{
|
|
// for Dec, we can't compare with gs_cumulatedDays[mon + 1], but we
|
|
// don't need it neither - because of the CHECK above we know that
|
|
// yday lies in December then
|
|
if ( (mon == Dec) || (yday <= gs_cumulatedDays[isLeap][mon + 1]) )
|
|
{
|
|
Set((wxDateTime::wxDateTime_t)(yday - gs_cumulatedDays[isLeap][mon]), mon, year);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Julian day number conversion and related stuff
|
|
// ----------------------------------------------------------------------------
|
|
|
|
double wxDateTime::GetJulianDayNumber() const
|
|
{
|
|
return m_time.ToDouble() / MILLISECONDS_PER_DAY + EPOCH_JDN + 0.5;
|
|
}
|
|
|
|
double wxDateTime::GetRataDie() const
|
|
{
|
|
// March 1 of the year 0 is Rata Die day -306 and JDN 1721119.5
|
|
return GetJulianDayNumber() - 1721119.5 - 306;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// timezone and DST stuff
|
|
// ----------------------------------------------------------------------------
|
|
|
|
int wxDateTime::IsDST(wxDateTime::Country country) const
|
|
{
|
|
wxCHECK_MSG( country == Country_Default, -1,
|
|
wxT("country support not implemented") );
|
|
|
|
// use the C RTL for the dates in the standard range
|
|
time_t timet = GetTicks();
|
|
if ( timet != (time_t)-1 )
|
|
{
|
|
struct tm tmstruct;
|
|
tm *tm = wxLocaltime_r(&timet, &tmstruct);
|
|
|
|
wxCHECK_MSG( tm, -1, wxT("wxLocaltime_r() failed") );
|
|
|
|
return tm->tm_isdst;
|
|
}
|
|
else
|
|
{
|
|
int year = GetYear();
|
|
|
|
if ( !IsDSTApplicable(year, country) )
|
|
{
|
|
// no DST time in this year in this country
|
|
return -1;
|
|
}
|
|
|
|
return IsBetween(GetBeginDST(year, country), GetEndDST(year, country));
|
|
}
|
|
}
|
|
|
|
wxDateTime& wxDateTime::MakeTimezone(const TimeZone& tz, bool noDST)
|
|
{
|
|
long secDiff = wxGetTimeZone() + tz.GetOffset();
|
|
|
|
// we need to know whether DST is or not in effect for this date unless
|
|
// the test disabled by the caller
|
|
if ( !noDST && (IsDST() == 1) )
|
|
{
|
|
// FIXME we assume that the DST is always shifted by 1 hour
|
|
secDiff -= 3600;
|
|
}
|
|
|
|
return Add(wxTimeSpan::Seconds(secDiff));
|
|
}
|
|
|
|
wxDateTime& wxDateTime::MakeFromTimezone(const TimeZone& tz, bool noDST)
|
|
{
|
|
long secDiff = wxGetTimeZone() + tz.GetOffset();
|
|
|
|
// we need to know whether DST is or not in effect for this date unless
|
|
// the test disabled by the caller
|
|
if ( !noDST && (IsDST() == 1) )
|
|
{
|
|
// FIXME we assume that the DST is always shifted by 1 hour
|
|
secDiff -= 3600;
|
|
}
|
|
|
|
return Subtract(wxTimeSpan::Seconds(secDiff));
|
|
}
|
|
|
|
// ============================================================================
|
|
// wxDateTimeHolidayAuthority and related classes
|
|
// ============================================================================
|
|
|
|
#include "wx/arrimpl.cpp"
|
|
|
|
WX_DEFINE_OBJARRAY(wxDateTimeArray)
|
|
|
|
static int wxCMPFUNC_CONV
|
|
wxDateTimeCompareFunc(wxDateTime **first, wxDateTime **second)
|
|
{
|
|
wxDateTime dt1 = **first,
|
|
dt2 = **second;
|
|
|
|
return dt1 == dt2 ? 0 : dt1 < dt2 ? -1 : +1;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxDateTimeHolidayAuthority
|
|
// ----------------------------------------------------------------------------
|
|
|
|
wxHolidayAuthoritiesArray wxDateTimeHolidayAuthority::ms_authorities;
|
|
|
|
/* static */
|
|
bool wxDateTimeHolidayAuthority::IsHoliday(const wxDateTime& dt)
|
|
{
|
|
size_t count = ms_authorities.size();
|
|
for ( size_t n = 0; n < count; n++ )
|
|
{
|
|
if ( ms_authorities[n]->DoIsHoliday(dt) )
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* static */
|
|
size_t
|
|
wxDateTimeHolidayAuthority::GetHolidaysInRange(const wxDateTime& dtStart,
|
|
const wxDateTime& dtEnd,
|
|
wxDateTimeArray& holidays)
|
|
{
|
|
wxDateTimeArray hol;
|
|
|
|
holidays.Clear();
|
|
|
|
const size_t countAuth = ms_authorities.size();
|
|
for ( size_t nAuth = 0; nAuth < countAuth; nAuth++ )
|
|
{
|
|
ms_authorities[nAuth]->DoGetHolidaysInRange(dtStart, dtEnd, hol);
|
|
|
|
WX_APPEND_ARRAY(holidays, hol);
|
|
}
|
|
|
|
holidays.Sort(wxDateTimeCompareFunc);
|
|
|
|
return holidays.size();
|
|
}
|
|
|
|
/* static */
|
|
void wxDateTimeHolidayAuthority::ClearAllAuthorities()
|
|
{
|
|
WX_CLEAR_ARRAY(ms_authorities);
|
|
}
|
|
|
|
/* static */
|
|
void wxDateTimeHolidayAuthority::AddAuthority(wxDateTimeHolidayAuthority *auth)
|
|
{
|
|
ms_authorities.push_back(auth);
|
|
}
|
|
|
|
wxDateTimeHolidayAuthority::~wxDateTimeHolidayAuthority()
|
|
{
|
|
// required here for Darwin
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxDateTimeWorkDays
|
|
// ----------------------------------------------------------------------------
|
|
|
|
bool wxDateTimeWorkDays::DoIsHoliday(const wxDateTime& dt) const
|
|
{
|
|
wxDateTime::WeekDay wd = dt.GetWeekDay();
|
|
|
|
return (wd == wxDateTime::Sun) || (wd == wxDateTime::Sat);
|
|
}
|
|
|
|
size_t wxDateTimeWorkDays::DoGetHolidaysInRange(const wxDateTime& dtStart,
|
|
const wxDateTime& dtEnd,
|
|
wxDateTimeArray& holidays) const
|
|
{
|
|
if ( dtStart > dtEnd )
|
|
{
|
|
wxFAIL_MSG( wxT("invalid date range in GetHolidaysInRange") );
|
|
|
|
return 0u;
|
|
}
|
|
|
|
holidays.Empty();
|
|
|
|
// instead of checking all days, start with the first Sat after dtStart and
|
|
// end with the last Sun before dtEnd
|
|
wxDateTime dtSatFirst = dtStart.GetNextWeekDay(wxDateTime::Sat),
|
|
dtSatLast = dtEnd.GetPrevWeekDay(wxDateTime::Sat),
|
|
dtSunFirst = dtStart.GetNextWeekDay(wxDateTime::Sun),
|
|
dtSunLast = dtEnd.GetPrevWeekDay(wxDateTime::Sun),
|
|
dt;
|
|
|
|
for ( dt = dtSatFirst; dt <= dtSatLast; dt += wxDateSpan::Week() )
|
|
{
|
|
holidays.Add(dt);
|
|
}
|
|
|
|
for ( dt = dtSunFirst; dt <= dtSunLast; dt += wxDateSpan::Week() )
|
|
{
|
|
holidays.Add(dt);
|
|
}
|
|
|
|
return holidays.GetCount();
|
|
}
|
|
|
|
// ============================================================================
|
|
// other helper functions
|
|
// ============================================================================
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// iteration helpers: can be used to write a for loop over enum variable like
|
|
// this:
|
|
// for ( m = wxDateTime::Jan; m < wxDateTime::Inv_Month; wxNextMonth(m) )
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// ----------------------------------------------------------------------------
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WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m)
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{
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wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") );
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// no wrapping or the for loop above would never end!
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m = (wxDateTime::Month)(m + 1);
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}
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WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m)
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{
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wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") );
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m = m == wxDateTime::Jan ? wxDateTime::Inv_Month
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: (wxDateTime::Month)(m - 1);
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}
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WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd)
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{
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wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") );
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// no wrapping or the for loop above would never end!
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wd = (wxDateTime::WeekDay)(wd + 1);
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}
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WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd)
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{
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wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") );
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wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay
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: (wxDateTime::WeekDay)(wd - 1);
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}
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#ifdef __WINDOWS__
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wxDateTime& wxDateTime::SetFromMSWSysTime(const SYSTEMTIME& st)
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{
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return Set(st.wDay,
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static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1),
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st.wYear,
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st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
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}
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wxDateTime& wxDateTime::SetFromMSWSysDate(const SYSTEMTIME& st)
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{
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return Set(st.wDay,
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static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1),
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st.wYear,
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0, 0, 0, 0);
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}
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void wxDateTime::GetAsMSWSysTime(SYSTEMTIME* st) const
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|
{
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const wxDateTime::Tm tm(GetTm());
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st->wYear = (WXWORD)tm.year;
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st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1);
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st->wDay = tm.mday;
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st->wDayOfWeek = 0;
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st->wHour = tm.hour;
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st->wMinute = tm.min;
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st->wSecond = tm.sec;
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st->wMilliseconds = tm.msec;
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}
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void wxDateTime::GetAsMSWSysDate(SYSTEMTIME* st) const
|
|
{
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|
const wxDateTime::Tm tm(GetTm());
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|
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st->wYear = (WXWORD)tm.year;
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st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1);
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st->wDay = tm.mday;
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st->wDayOfWeek =
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st->wHour =
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st->wMinute =
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st->wSecond =
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|
st->wMilliseconds = 0;
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}
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#endif // __WINDOWS__
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#endif // wxUSE_DATETIME
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