X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b76b015ed9231ffe128ddba9fb35e37b4be9764d..7d59475e80c3ed8b9bb002fd402d6a7cc7dc090a:/include/wx/datetime.h diff --git a/include/wx/datetime.h b/include/wx/datetime.h index bf7cab1fcc..6e45b0fcd4 100644 --- a/include/wx/datetime.h +++ b/include/wx/datetime.h @@ -7,35 +7,57 @@ // Created: 10.02.99 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifndef _WX_TIME_H -#define _WX_TIME_H +#ifndef _WX_DATETIME_H +#define _WX_DATETIME_H -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma interface "datetime.h" #endif +#include "wx/defs.h" + +#if wxUSE_DATETIME + +#ifndef __WXWINCE__ #include +#else +#include "wx/msw/wince/time.h" +#endif + #include // for INT_MIN #include "wx/longlong.h" -class WXDLLEXPORT wxDateTime; -class WXDLLEXPORT wxTimeSpan; -class WXDLLEXPORT wxDateSpan; +class WXDLLIMPEXP_BASE wxDateTime; +class WXDLLIMPEXP_BASE wxTimeSpan; +class WXDLLIMPEXP_BASE wxDateSpan; +#include "wx/dynarray.h" + +// not all c-runtimes are based on 1/1/1970 being (time_t) 0 +// set this to the corresponding value in seconds 1/1/1970 has on your +// systems c-runtime + +#if defined(__WXMAC__) && !defined(__DARWIN__) && __MSL__ < 0x6000 + #define WX_TIME_BASE_OFFSET ( 2082844800L + 126144000L ) +#else + #define WX_TIME_BASE_OFFSET 0 +#endif /* - * TODO Well, everything :-) + * TODO * - * 1. Time zones with minutes (make wxTimeZone a class) - * 2. getdate() function like under Solaris - * 3. text conversion for wxDateSpan + * + 1. Time zones with minutes (make TimeZone a class) + * ? 2. getdate() function like under Solaris + * + 3. text conversion for wxDateSpan + * + 4. pluggable modules for the workdays calculations + * 5. wxDateTimeHolidayAuthority for Easter and other christian feasts */ /* - The three classes declared in this header represent: + The three (main) classes declared in this header represent: 1. An absolute moment in the time (wxDateTime) 2. A difference between two moments in the time, positive or negative @@ -53,40 +75,64 @@ class WXDLLEXPORT wxDateSpan; wxTimeSpan + wxTimeSpan = wxTimeSpan wxDateSpan + wxDateSpan = wxDateSpan - substraction + subtraction ------------ wxDateTime - wxDateTime = wxTimeSpan + wxDateTime - wxTimeSpan = wxDateTime + wxDateTime - wxDateSpan = wxDateTime wxTimeSpan - wxTimeSpan = wxTimeSpan wxDateSpan - wxDateSpan = wxDateSpan multiplication -------------- wxTimeSpan * number = wxTimeSpan + number * wxTimeSpan = wxTimeSpan wxDateSpan * number = wxDateSpan + number * wxDateSpan = wxDateSpan unitary minus ------------- -wxTimeSpan = wxTimeSpan -wxDateSpan = wxDateSpan + + For each binary operation OP (+, -, *) we have the following operatorOP=() as + a method and the method with a symbolic name OPER (Add, Subtract, Multiply) + as a synonym for it and another const method with the same name which returns + the changed copy of the object and operatorOP() as a global function which is + implemented in terms of the const version of OPEN. For the unary - we have + operator-() as a method, Neg() as synonym for it and Negate() which returns + the copy of the object with the changed sign. */ +// an invalid/default date time object which may be used as the default +// argument for arguments of type wxDateTime; it is also returned by all +// functions returning wxDateTime on failure (this is why it is also called +// wxInvalidDateTime) +class WXDLLIMPEXP_BASE wxDateTime; + +extern WXDLLIMPEXP_DATA_BASE(const wxDateTime) wxDefaultDateTime; +#define wxInvalidDateTime wxDefaultDateTime + // ---------------------------------------------------------------------------- -// This class represents an absolute moment in the time +// wxDateTime represents an absolute moment in the time // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDateTime +class WXDLLIMPEXP_BASE wxDateTime { public: // types // ------------------------------------------------------------------------ - // a small unsigned integer type for storing things like seconds, days - // of the week, &c. It should be at least short (i.e. not char) to - // contain the number of milliseconds - it may also be 'int' because - // there is no size penalty associated with it in our code, we don't - // store any data in this format + // a small unsigned integer type for storing things like minutes, + // seconds &c. It should be at least short (i.e. not char) to contain + // the number of milliseconds - it may also be 'int' because there is + // no size penalty associated with it in our code, we don't store any + // data in this format typedef unsigned short wxDateTime_t; + // constants + // ------------------------------------------------------------------------ + // the timezones enum TZ { @@ -106,10 +152,45 @@ public: // Note that GMT12 and GMT_12 are not the same: there is a difference // of exactly one day between them - // Universal Coordinated Time + // some symbolic names for TZ + + // Europe + WET = GMT0, // Western Europe Time + WEST = GMT1, // Western Europe Summer Time + CET = GMT1, // Central Europe Time + CEST = GMT2, // Central Europe Summer Time + EET = GMT2, // Eastern Europe Time + EEST = GMT3, // Eastern Europe Summer Time + MSK = GMT3, // Moscow Time + MSD = GMT4, // Moscow Summer Time + + // US and Canada + AST = GMT_4, // Atlantic Standard Time + ADT = GMT_3, // Atlantic Daylight Time + EST = GMT_5, // Eastern Standard Time + EDT = GMT_4, // Eastern Daylight Saving Time + CST = GMT_6, // Central Standard Time + CDT = GMT_5, // Central Daylight Saving Time + MST = GMT_7, // Mountain Standard Time + MDT = GMT_6, // Mountain Daylight Saving Time + PST = GMT_8, // Pacific Standard Time + PDT = GMT_7, // Pacific Daylight Saving Time + HST = GMT_10, // Hawaiian Standard Time + AKST = GMT_9, // Alaska Standard Time + AKDT = GMT_8, // Alaska Daylight Saving Time + + // Australia + + A_WST = GMT8, // Western Standard Time + A_CST = GMT12 + 1, // Central Standard Time (+9.5) + A_EST = GMT10, // Eastern Standard Time + A_ESST = GMT11, // Eastern Summer Time + + // TODO add more symbolic timezone names here + + // Universal Coordinated Time = the new and politically correct name + // for GMT UTC = GMT0 - - // TODO add symbolic names for TZ (EST, MET, ...)? }; // the calendar systems we know about: notice that it's valid (for @@ -247,17 +328,33 @@ public: // day or not // // TODO move this to intl.h + +// Required for WinCE +#ifdef USA +#undef USA +#endif + enum Country { Country_Unknown, // no special information for this country Country_Default, // set the default country with SetCountry() method + // or use the default country with any other // TODO add more countries (for this we must know about DST and/or // holidays for this country) + + // Western European countries: we assume that they all follow the same + // DST rules (true or false?) + Country_WesternEurope_Start, + Country_EEC = Country_WesternEurope_Start, France, + Germany, + UK, + Country_WesternEurope_End = UK, + + Russia, USA }; - // symbolic names for the months enum Month { @@ -276,22 +373,57 @@ public: Inv_Year = SHRT_MIN // should hold in wxDateTime_t }; + // flags for GetWeekDayName and GetMonthName + enum NameFlags + { + Name_Full = 0x01, // return full name + Name_Abbr = 0x02 // return abbreviated name + }; + + // flags for GetWeekOfYear and GetWeekOfMonth + enum WeekFlags + { + Default_First, // Sunday_First for US, Monday_First for the rest + Monday_First, // week starts with a Monday + Sunday_First // week starts with a Sunday + }; + // helper classes // ------------------------------------------------------------------------ + // a class representing a time zone: basicly, this is just an offset + // (in seconds) from GMT + class WXDLLIMPEXP_BASE TimeZone + { + public: + TimeZone(TZ tz); + TimeZone(wxDateTime_t offset = 0) { m_offset = offset; } + + long GetOffset() const { return m_offset; } + + private: + // offset for this timezone from GMT in seconds + long m_offset; + }; + // standard struct tm is limited to the years from 1900 (because // tm_year field is the offset from 1900), so we use our own struct // instead to represent broken down time - struct Tm + // + // NB: this struct should always be kept normalized (i.e. mon should + // be < 12, 1 <= day <= 31 &c), so use AddMonths(), AddDays() + // instead of modifying the member fields directly! + struct WXDLLIMPEXP_BASE Tm { - wxDateTime_t sec, min, hour, - mday, mon, year; + wxDateTime_t msec, sec, min, hour, mday; + Month mon; + int year; // default ctor inits the object to an invalid value Tm(); - // ctor from struct tm - Tm(const struct tm& tm); + // ctor from struct tm and the timezone + Tm(const struct tm& tm, const TimeZone& tz); // check that the given date/time is valid (in Gregorian calendar) bool IsValid() const; @@ -305,37 +437,35 @@ public: return (WeekDay)wday; } + // add the given number of months to the date keeping it normalized + void AddMonths(int monDiff); + + // add the given number of months to the date keeping it normalized + void AddDays(int dayDiff); + private: // compute the weekday from other fields void ComputeWeekDay(); + // the timezone we correspond to + TimeZone m_tz; + // these values can't be accessed directly because they're not always // computed and we calculate them on demand wxDateTime_t wday, yday; }; - // a class representing a time zone: basicly, this is just an offset - // (in minutes) from GMT - class TimeZone - { - public: - TimeZone(TZ tz); - TimeZone(wxDateTime_t offset) { m_offset = offset; } - - wxDateTime_t GetOffset() const { return m_offset; } - - private: - // offset for this timezone from GMT in minutes - wxDateTime_t m_offset; - }; - // static methods // ------------------------------------------------------------------------ // set the current country static void SetCountry(Country country); // get the current country - static inline Country GetCountry(); + static Country GetCountry(); + + // return TRUE if the country is a West European one (in practice, + // this means that the same DST rules as for EEC apply) + static bool IsWestEuropeanCountry(Country country = Country_Default); // return the current year static int GetCurrentYear(Calendar cal = Gregorian); @@ -350,7 +480,10 @@ public: static Month GetCurrentMonth(Calendar cal = Gregorian); // returns TRUE if the given year is a leap year in the given calendar - static bool IsLeapYear(int year, Calendar cal = Gregorian); + static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian); + + // get the century (19 for 1999, 20 for 2000 and -5 for 492 BC) + static int GetCentury(int year = Inv_Year); // returns the number of days in this year (356 or 355 for Gregorian // calendar usually :-) @@ -364,42 +497,64 @@ public: // get the full (default) or abbreviated month name in the current // locale, returns empty string on error - static wxString GetMonthName(Month month, bool abbr = FALSE); + static wxString GetMonthName(Month month, + NameFlags flags = Name_Full); // get the full (default) or abbreviated weekday name in the current // locale, returns empty string on error - static wxString GetWeekDayName(WeekDay weekday, bool abbr = FALSE); + static wxString GetWeekDayName(WeekDay weekday, + NameFlags flags = Name_Full); + + // get the AM and PM strings in the current locale (may be empty) + static void GetAmPmStrings(wxString *am, wxString *pm); + + // return TRUE if the given country uses DST for this year + static bool IsDSTApplicable(int year = Inv_Year, + Country country = Country_Default); // get the beginning of DST for this year, will return invalid object // if no DST applicable in this year. The default value of the // parameter means to take the current year. - static wxDateTime GetBeginDST(int year = Inv_Year); + static wxDateTime GetBeginDST(int year = Inv_Year, + Country country = Country_Default); // get the end of DST for this year, will return invalid object // if no DST applicable in this year. The default value of the // parameter means to take the current year. - static wxDateTime GetEndDST(int year = Inv_Year); + static wxDateTime GetEndDST(int year = Inv_Year, + Country country = Country_Default); // return the wxDateTime object for the current time static inline wxDateTime Now(); + // return the wxDateTime object for the current time with millisecond + // precision (if available on this platform) + static wxDateTime UNow(); + + // return the wxDateTime object for today midnight: i.e. as Now() but + // with time set to 0 + static inline wxDateTime Today(); + // constructors: you should test whether the constructor succeeded with // IsValid() function. The values Inv_Month and Inv_Year for the // parameters mean take current month and/or year values. - // - // All new wxDateTime correspond to the local time, use ToUTC() or - // MakeUTC() to get the time in UTC/GMT. // ------------------------------------------------------------------------ // default ctor does not initialize the object, use Set()! - wxDateTime() { } + wxDateTime() { m_time = wxLongLong((long)ULONG_MAX, ULONG_MAX); } // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970) +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration inline wxDateTime(time_t timet); +#endif // from broken down time/date (only for standard Unix range) inline wxDateTime(const struct tm& tm); // from broken down time/date (any range) inline wxDateTime(const Tm& tm); + // from JDN (beware of rounding errors) + inline wxDateTime(double jdn); + // from separate values for each component, date set to today inline wxDateTime(wxDateTime_t hour, wxDateTime_t minute = 0, @@ -407,7 +562,7 @@ public: wxDateTime_t millisec = 0); // from separate values for each component with explicit date inline wxDateTime(wxDateTime_t day, // day of the month - Month month = Inv_Month, + Month month, int year = Inv_Year, // 1999, not 99 please! wxDateTime_t hour = 0, wxDateTime_t minute = 0, @@ -426,8 +581,11 @@ public: // set to the current time inline wxDateTime& SetToCurrent(); +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration // set to given time_t value inline wxDateTime& Set(time_t timet); +#endif // set to given broken down time/date wxDateTime& Set(const struct tm& tm); @@ -435,6 +593,9 @@ public: // set to given broken down time/date inline wxDateTime& Set(const Tm& tm); + // set to given JDN (beware of rounding errors) + wxDateTime& Set(double jdn); + // set to given time, date = today wxDateTime& Set(wxDateTime_t hour, wxDateTime_t minute = 0, @@ -444,7 +605,7 @@ public: // from separate values for each component with explicit date // (defaults for month and year are the current values) wxDateTime& Set(wxDateTime_t day, - Month month = Inv_Month, + Month month, int year = Inv_Year, // 1999, not 99 please! wxDateTime_t hour = 0, wxDateTime_t minute = 0, @@ -484,30 +645,65 @@ public: // default assignment operator is ok // calendar calculations (functions which set the date only leave the time - // unchanged, e.g. don't explictly zero it) + // unchanged, e.g. don't explictly zero it): SetXXX() functions modify the + // object itself, GetXXX() ones return a new object. // ------------------------------------------------------------------------ + // set to the given week day in the same week as this one + wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday, + WeekFlags flags = Monday_First); + inline wxDateTime GetWeekDayInSameWeek(WeekDay weekday, + WeekFlags flags = Monday_First) const; + + // set to the next week day following this one + wxDateTime& SetToNextWeekDay(WeekDay weekday); + inline wxDateTime GetNextWeekDay(WeekDay weekday) const; + + // set to the previous week day before this one + wxDateTime& SetToPrevWeekDay(WeekDay weekday); + inline wxDateTime GetPrevWeekDay(WeekDay weekday) const; + // set to Nth occurence of given weekday in the given month of the // given year (time is set to 0), return TRUE on success and FALSE on // failure. n may be positive (1..5) or negative to count from the end // of the month (see helper function SetToLastWeekDay()) bool SetToWeekDay(WeekDay weekday, int n = 1, - wxDateTime_t month = Inv_Month, + Month month = Inv_Month, int year = Inv_Year); + inline wxDateTime GetWeekDay(WeekDay weekday, + int n = 1, + Month month = Inv_Month, + int year = Inv_Year) const; // sets to the last weekday in the given month, year inline bool SetToLastWeekDay(WeekDay weekday, - wxDateTime_t month = Inv_Month, + Month month = Inv_Month, int year = Inv_Year); + inline wxDateTime GetLastWeekDay(WeekDay weekday, + Month month = Inv_Month, + int year = Inv_Year); // sets the date to the given day of the given week in the year, // returns TRUE on success and FALSE if given date doesn't exist (e.g. // numWeek is > 53) - bool SetToTheWeek(wxDateTime_t numWeek, WeekDay weekday = Mon); - - // get the century (19 for 1999, 20 for 2000 and -5 for 492 BC) - int GetCentury() const; + bool SetToTheWeek(wxDateTime_t numWeek, + WeekDay weekday = Mon, + WeekFlags flags = Monday_First); + inline wxDateTime GetWeek(wxDateTime_t numWeek, + WeekDay weekday = Mon, + WeekFlags flags = Monday_First) const; + + // sets the date to the last day of the given (or current) month or the + // given (or current) year + wxDateTime& SetToLastMonthDay(Month month = Inv_Month, + int year = Inv_Year); + inline wxDateTime GetLastMonthDay(Month month = Inv_Month, + int year = Inv_Year) const; + + // sets to the given year day (1..365 or 366) + wxDateTime& SetToYearDay(wxDateTime_t yday); + inline wxDateTime GetYearDay(wxDateTime_t yday) const; // The definitions below were taken verbatim from // @@ -531,31 +727,51 @@ public: // of days relative to a base date of December 31 of the year 0. Thus // January 1 of the year 1 is Rata Die day 1. - // get the Julian Day number - long GetJulianDay() const; + // get the Julian Day number (the fractional part specifies the time of + // the day, related to noon - beware of rounding errors!) + double GetJulianDayNumber() const; + double GetJDN() const { return GetJulianDayNumber(); } + + // get the Modified Julian Day number: it is equal to JDN - 2400000.5 + // and so integral MJDs correspond to the midnights (and not noons). + // MJD 0 is Nov 17, 1858 + double GetModifiedJulianDayNumber() const { return GetJDN() - 2400000.5; } + double GetMJD() const { return GetModifiedJulianDayNumber(); } // get the Rata Die number - long GetRataDie() const; + double GetRataDie() const; // TODO algorithms for calculating some important dates, such as // religious holidays (Easter...) or moon/solar eclipses? Some // algorithms can be found in the calendar FAQ - // timezone stuff: by default, we always work with local times, to get - // anything else, it should be requested explicitly + // timezone stuff: a wxDateTime object constructed using given + // day/month/year/hour/min/sec values correspond to this moment in local + // time. Using the functions below, it may be converted to another time + // zone (for example, the Unix epoch is wxDateTime(1, Jan, 1970).ToGMT()) + // + // these functions try to handle DST internally, but there is no magical + // way to know all rules for it in all countries in the world, so if the + // program can handle it itself (or doesn't want to handle it at all for + // whatever reason), the DST handling can be disabled with noDST. + // + // Converting to the local time zone doesn't do anything. // ------------------------------------------------------------------------ - // get the time corresponding to this one in UTC/GMT - wxDateTime ToUTC() const; - wxDateTime ToGMT() const { return ToUTC(); } + // transform to any given timezone + inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = FALSE) const; + wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = FALSE); - // transform this object to UTC/GMT - wxDateTime& MakeUTC(); - wxDateTime& MakeGMT() { return MakeUTC(); } + // transform to GMT/UTC + wxDateTime ToGMT(bool noDST = FALSE) const { return ToTimezone(GMT0, noDST); } + wxDateTime& MakeGMT(bool noDST = FALSE) { return MakeTimezone(GMT0, noDST); } - // generic version: transform time to any given timezone - wxDateTime ToTimezone(const TimeZone& tz); - wxDateTime& MakeTimezone(const TimeZone& tz); + // is daylight savings time in effect at this moment according to the + // rules of the specified country? + // + // Return value is > 0 if DST is in effect, 0 if it is not and -1 if + // the information is not available (this is compatible with ANSI C) + int IsDST(Country country = Country_Default) const; // accessors: many of them take the timezone parameter which indicates the // timezone for which to make the calculations and the default value means @@ -564,58 +780,76 @@ public: // result of timezone shift) // ------------------------------------------------------------------------ - // is the date valid (FALSE for uninitialized objects as well as after - // the functions which failed to convert the date to supported range) - inline bool IsValid() const { return this != &ms_InvDateTime; } + // is the date valid? + inline bool IsValid() const { return m_time != wxInvalidDateTime.m_time; } - // get the broken down date/time representation - Tm GetTm() const; + // get the broken down date/time representation in the given timezone + // + // If you wish to get several time components (day, month and year), + // consider getting the whole Tm strcuture first and retrieving the + // value from it - this is much more efficient + Tm GetTm(const TimeZone& tz = Local) const; // get the number of seconds since the Unix epoch - returns (time_t)-1 // if the value is out of range inline time_t GetTicks() const; // get the year (returns Inv_Year if date is invalid) - int GetYear() const { return GetTm().year; } + int GetYear(const TimeZone& tz = Local) const + { return GetTm(tz).year; } // get the month (Inv_Month if date is invalid) - Month GetMonth() const { return (Month)GetTm().mon; } + Month GetMonth(const TimeZone& tz = Local) const + { return (Month)GetTm(tz).mon; } // get the month day (in 1..31 range, 0 if date is invalid) - wxDateTime_t GetDay() const { return GetTm().mday; } + wxDateTime_t GetDay(const TimeZone& tz = Local) const + { return GetTm(tz).mday; } // get the day of the week (Inv_WeekDay if date is invalid) - WeekDay GetDayOfWeek() const { return GetTm().GetWeekDay(); } + WeekDay GetWeekDay(const TimeZone& tz = Local) const + { return GetTm(tz).GetWeekDay(); } // get the hour of the day - wxDateTime_t GetHour() const { return GetTm().hour; } + wxDateTime_t GetHour(const TimeZone& tz = Local) const + { return GetTm(tz).hour; } // get the minute - wxDateTime_t GetMinute() const { return GetTm().min; } + wxDateTime_t GetMinute(const TimeZone& tz = Local) const + { return GetTm(tz).min; } // get the second - wxDateTime_t GetSecond() const { return GetTm().sec; } + wxDateTime_t GetSecond(const TimeZone& tz = Local) const + { return GetTm(tz).sec; } // get milliseconds - wxDateTime_t GetMillisecond() const { return m_time.GetLo() % 1000; } + wxDateTime_t GetMillisecond(const TimeZone& tz = Local) const + { return GetTm(tz).msec; } // get the day since the year start (1..366, 0 if date is invalid) - wxDateTime_t GetDayOfYear() const; - // get the week number since the year start (1..52, 0 if date is + wxDateTime_t GetDayOfYear(const TimeZone& tz = Local) const; + // get the week number since the year start (1..52 or 53, 0 if date is + // invalid) + wxDateTime_t GetWeekOfYear(WeekFlags flags = Monday_First, + const TimeZone& tz = Local) const; + // get the week number since the month start (1..5, 0 if date is // invalid) - wxDateTime_t GetWeekOfYear() const; + wxDateTime_t GetWeekOfMonth(WeekFlags flags = Monday_First, + const TimeZone& tz = Local) const; // is this date a work day? This depends on a country, of course, // because the holidays are different in different countries - bool IsWorkDay(Country country = Country_Default, - TimeZone zone = Local) const; + 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 authoiruty in + // 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; - // is daylight savings time in effect at this moment? - // - // Return value is > 0 if DST is in effect, 0 if it is not and -1 if - // the information is not available (this is compatible with ANSI C) - int IsDST(Country country = Country_Default, TimeZone zone = Local) const; + // dos date and time format + // ------------------------------------------------------------------------ + + // set from the DOS packed format + wxDateTime& SetFromDOS(unsigned long ddt); + + // pack the date in DOS format + unsigned long GetAsDOS() const; // comparison (see also functions below for operator versions) // ------------------------------------------------------------------------ @@ -623,12 +857,6 @@ public: // returns TRUE if the two moments are strictly identical inline bool IsEqualTo(const wxDateTime& datetime) const; - // returns TRUE if the two moments are identical - inline bool operator==(const wxDateTime& datetime) const; - - // returns TRUE if the two moments are different - inline bool operator!=(const wxDateTime& datetime) const; - // returns TRUE if the date is strictly earlier than the given one inline bool IsEarlierThan(const wxDateTime& datetime) const; @@ -642,69 +870,110 @@ public: // returns TRUE if the date is in the given range inline bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; - // date operations: for the non-const methods, the return value is this - // object itself (see also functions below for operator versions) + // do these two objects refer to the same date? + inline bool IsSameDate(const wxDateTime& dt) const; + + // do these two objects have the same time? + inline bool IsSameTime(const wxDateTime& dt) const; + + // are these two objects equal up to given timespan? + inline bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const; + + // arithmetics with dates (see also below for more operators) // ------------------------------------------------------------------------ + // return the sum of the date with a time span (positive or negative) + inline wxDateTime Add(const wxTimeSpan& diff) const; // add a time span (positive or negative) inline wxDateTime& Add(const wxTimeSpan& diff); // add a time span (positive or negative) inline wxDateTime& operator+=(const wxTimeSpan& diff); - // substract a time span (positive or negative) - inline wxDateTime& Substract(const wxTimeSpan& diff); - // substract a time span (positive or negative) + // return the difference of the date with a time span + inline wxDateTime Subtract(const wxTimeSpan& diff) const; + // subtract a time span (positive or negative) + inline wxDateTime& Subtract(const wxTimeSpan& diff); + // subtract a time span (positive or negative) inline wxDateTime& operator-=(const wxTimeSpan& diff); + // return the sum of the date with a date span + inline wxDateTime Add(const wxDateSpan& diff) const; // add a date span (positive or negative) wxDateTime& Add(const wxDateSpan& diff); // add a date span (positive or negative) inline wxDateTime& operator+=(const wxDateSpan& diff); - // substract a date span (positive or negative) - inline wxDateTime& Substract(const wxDateSpan& diff); - // substract a date span (positive or negative) + // return the difference of the date with a date span + inline wxDateTime Subtract(const wxDateSpan& diff) const; + // subtract a date span (positive or negative) + inline wxDateTime& Subtract(const wxDateSpan& diff); + // subtract a date span (positive or negative) inline wxDateTime& operator-=(const wxDateSpan& diff); - // substract a date (may result in positive or negative time span) - inline wxTimeSpan Substract(const wxDateTime& datetime) const; - // substract a date (may result in positive or negative time span) - inline wxTimeSpan operator-(const wxDateTime& datetime) const; + // return the difference between two dates + inline wxTimeSpan Subtract(const wxDateTime& dt) const; - // conversion to/from text: all conversions from text return TRUE on - // success or FALSE if the date is malformed/out of supported range + // conversion to/from text: all conversions from text return the pointer to + // the next character following the date specification (i.e. the one where + // the scan had to stop) or NULL on failure. // ------------------------------------------------------------------------ // parse a string in RFC 822 format (found e.g. in mail headers and // having the form "Wed, 10 Feb 1999 19:07:07 +0100") - bool ParseRfc822Date(const wxString& date); - // parse a date/time in the given format (see strptime(3)) - bool ParseFormat(const wxString& date, const char *format = "%c"); + const wxChar *ParseRfc822Date(const wxChar* date); + // parse a date/time in the given format (see strptime(3)), fill in + // the missing (in the string) fields with the values of dateDef (by + // default, they will not change if they had valid values or will + // default to Today() otherwise) + const wxChar *ParseFormat(const wxChar *date, + const wxChar *format = _T("%c"), + const wxDateTime& dateDef = wxDefaultDateTime); // parse a string containing the date/time in "free" format, this // function will try to make an educated guess at the string contents - // (and return FALSE if it fails) - bool ParseDateTime(const wxString& date); + const wxChar *ParseDateTime(const wxChar *datetime); + // parse a string containing the date only in "free" format (less + // flexible than ParseDateTime) + const wxChar *ParseDate(const wxChar *date); + // parse a string containing the time only in "free" format + const wxChar *ParseTime(const wxChar *time); // this function accepts strftime()-like format string (default // argument corresponds to the preferred date and time representation // for the current locale) and returns the string containing the // resulting text representation - wxString Format(const wxChar *format = _T("%c")) const; + wxString Format(const wxChar *format = _T("%c"), + const TimeZone& tz = Local) const; // preferred date representation for the current locale wxString FormatDate() const { return Format(_T("%x")); } // preferred time representation for the current locale wxString FormatTime() const { return Format(_T("%X")); } + // returns the string representing the date in ISO 8601 format + // (YYYY-MM-DD) + wxString FormatISODate() const { return Format(_T("%Y-%m-%d")); } + // returns the string representing the time in ISO 8601 format + // (HH:MM:SS) + wxString FormatISOTime() const { return Format(_T("%H:%M:%S")); } // implementation // ------------------------------------------------------------------------ + // construct from internal representation + wxDateTime(const wxLongLong& time) { m_time = time; } + // get the internal representation inline wxLongLong GetValue() const; -private: // a helper function to get the current time_t - static inline time_t GetTimeNow() { return time((time_t *)NULL); } + static time_t GetTimeNow() { return time((time_t *)NULL); } + + // another one to get the current time broken down + static struct tm *GetTmNow() + { + time_t t = GetTimeNow(); + return localtime(&t); + } +private: // the current country - as it's the same for all program objects (unless // it runs on a _really_ big cluster system :-), this is a static member: // see SetCountry() and GetCountry() @@ -713,15 +982,11 @@ private: // this constant is used to transform a time_t value to the internal // representation, as time_t is in seconds and we use milliseconds it's // fixed to 1000 - static const unsigned int TIME_T_FACTOR; - - // invalid wxDateTime object - returned by all functions which return - // "wxDateTime &" on failure - static wxDateTime ms_InvDateTime; + static const long TIME_T_FACTOR; // returns TRUE if we fall in range in which we can use standard ANSI C // functions - inline IsInStdRange() const; + inline bool IsInStdRange() const; // the internal representation of the time is the amount of milliseconds // elapsed since the origin which is set by convention to the UNIX/C epoch @@ -731,62 +996,74 @@ private: // ---------------------------------------------------------------------------- // This class contains a difference between 2 wxDateTime values, so it makes -// sense to add it to wxDateTime and it is the result of substraction of 2 +// sense to add it to wxDateTime and it is the result of subtraction of 2 // objects of that class. See also wxDateSpan. // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxTimeSpan +class WXDLLIMPEXP_BASE wxTimeSpan { public: // constructors // ------------------------------------------------------------------------ + // return the timespan for the given number of seconds + static wxTimeSpan Seconds(long sec) { return wxTimeSpan(0, 0, sec); } + static wxTimeSpan Second() { return Seconds(1); } + + // return the timespan for the given number of minutes + static wxTimeSpan Minutes(long min) { return wxTimeSpan(0, min, 0 ); } + static wxTimeSpan Minute() { return Minutes(1); } + + // return the timespan for the given number of hours + static wxTimeSpan Hours(long hours) { return wxTimeSpan(hours, 0, 0); } + static wxTimeSpan Hour() { return Hours(1); } + + // return the timespan for the given number of days + static wxTimeSpan Days(long days) { return Hours(24 * days); } + static wxTimeSpan Day() { return Days(1); } + + // return the timespan for the given number of weeks + static wxTimeSpan Weeks(long days) { return Days(7 * days); } + static wxTimeSpan Week() { return Weeks(1); } + // default ctor constructs the 0 time span wxTimeSpan() { } // from separate values for each component, date set to 0 (hours are // not restricted to 0..24 range, neither are minutes, seconds or // milliseconds) - wxTimeSpan(int hours, - int minutes = 0, - int seconds = 0, - int milliseconds = 0); - // from separate values for each component with explicit date (none of - // the parameters isn't restricted to any range) - wxTimeSpan(int years, - int months, - int days, - int hours = 0, - int minutes = 0, - int seconds = 0, - int milliseconds = 0); - - // from internal representation - wxTimeSpan(wxLongLong diff) : m_diff(diff) { } + inline wxTimeSpan(long hours, + long minutes = 0, + long seconds = 0, + long milliseconds = 0); // default copy ctor is ok // no dtor - // arithmetics with time spans + // arithmetics with time spans (see also below for more operators) // ------------------------------------------------------------------------ + // return the sum of two timespans + inline wxTimeSpan Add(const wxTimeSpan& diff) const; // add two timespans together inline wxTimeSpan& Add(const wxTimeSpan& diff); // add two timespans together wxTimeSpan& operator+=(const wxTimeSpan& diff) { return Add(diff); } - // substract another timespan - inline wxTimeSpan& Substract(const wxTimeSpan& diff); - // substract another timespan - wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Substract(diff); } + // return the difference of two timespans + inline wxTimeSpan Subtract(const wxTimeSpan& diff) const; + // subtract another timespan + inline wxTimeSpan& Subtract(const wxTimeSpan& diff); + // subtract another timespan + wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Subtract(diff); } + // multiply timespan by a scalar + inline wxTimeSpan Multiply(int n) const; // multiply timespan by a scalar inline wxTimeSpan& Multiply(int n); // multiply timespan by a scalar wxTimeSpan& operator*=(int n) { return Multiply(n); } - // multiply timespan by a scalar - inline wxTimeSpan operator*(int n) const; // return this timespan with inversed sign wxTimeSpan Negate() const { return wxTimeSpan(-GetValue()); } @@ -827,16 +1104,9 @@ public: // timespans are equal in absolute value. bool IsShorterThan(const wxTimeSpan& t) const { return !IsLongerThan(t); } - // breaking into years, ..., days, ..., seconds: all these functions - // behave like GetYears() which returns 1 for the timespan of 1 year and 1 - // day, but 0 (and not -1) for the negative timespan of 1 year without 1 - // day. IOW, (ts - wxTimeSpan(ts.GetYears())).GetYears() is always 0. + // breaking into days, hours, minutes and seconds // ------------------------------------------------------------------------ - // get the max number of years in this timespan - inline int GetYears() const; - // get the max number of months in this timespan - inline int GetMonths() const; // get the max number of weeks in this timespan inline int GetWeeks() const; // get the max number of days in this timespan @@ -846,7 +1116,7 @@ public: // get the max number of minutes in this timespan inline int GetMinutes() const; // get the max number of seconds in this timespan - inline int GetSeconds() const; + inline wxLongLong GetSeconds() const; // get the number of milliseconds in this timespan wxLongLong GetMilliseconds() const { return m_diff; } @@ -859,15 +1129,14 @@ public: // resulting text representation. Notice that only some of format // specifiers valid for wxDateTime are valid for wxTimeSpan: hours, // minutes and seconds make sense, but not "PM/AM" string for example. - wxString Format(const char *format = "%c") const; - // preferred date representation for the current locale - wxString FormatDate() const { return Format("%x"); } - // preferred time representation for the current locale - wxString FormatTime() const { return Format("%X"); } + wxString Format(const wxChar *format = _T("%H:%M:%S")) const; // implementation // ------------------------------------------------------------------------ + // construct from internal representation + wxTimeSpan(const wxLongLong& diff) { m_diff = diff; } + // get the internal representation wxLongLong GetValue() const { return m_diff; } @@ -884,7 +1153,12 @@ private: // one month to Feb, 15 - we want to get Mar, 15, of course). // // When adding a month to the date, all lesser components (days, hours, ...) -// won't be changed. +// won't be changed unless the resulting date would be invalid: for example, +// Jan 31 + 1 month will be Feb 28, not (non existing) Feb 31. +// +// Because of this feature, adding and subtracting back again the same +// wxDateSpan will *not*, in general give back the original date: Feb 28 - 1 +// month will be Jan 28, not Jan 31! // // wxDateSpan can be either positive or negative. They may be // multiplied by scalars which multiply all deltas by the scalar: i.e. 2*(1 @@ -895,19 +1169,47 @@ private: // Beware about weeks: if you specify both weeks and days, the total number of // days added will be 7*weeks + days! See also GetTotalDays() function. // +// Equality operators are defined for wxDateSpans. Two datespans are equal if +// they both give the same target date when added to *every* source date. +// Thus wxDateSpan::Months(1) is not equal to wxDateSpan::Days(30), because +// they not give the same date when added to 1 Feb. But wxDateSpan::Days(14) is +// equal to wxDateSpan::Weeks(2) +// // Finally, notice that for adding hours, minutes &c you don't need this // class: wxTimeSpan will do the job because there are no subtleties // associated with those. // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDateSpan +class WXDLLIMPEXP_BASE wxDateSpan { public: // constructors // ------------------------------------------------------------------------ // this many years/months/weeks/days - wxDateSpan(int years, int months, int weeks, int days); + wxDateSpan(int years = 0, int months = 0, int weeks = 0, int days = 0) + { + m_years = years; + m_months = months; + m_weeks = weeks; + m_days = days; + } + + // get an object for the given number of days + static wxDateSpan Days(int days) { return wxDateSpan(0, 0, 0, days); } + static wxDateSpan Day() { return Days(1); } + + // get an object for the given number of weeks + static wxDateSpan Weeks(int weeks) { return wxDateSpan(0, 0, weeks, 0); } + static wxDateSpan Week() { return Weeks(1); } + + // get an object for the given number of months + static wxDateSpan Months(int mon) { return wxDateSpan(0, mon, 0, 0); } + static wxDateSpan Month() { return Months(1); } + + // get an object for the given number of years + static wxDateSpan Years(int years) { return wxDateSpan(years, 0, 0, 0); } + static wxDateSpan Year() { return Years(1); } // default copy ctor is ok @@ -936,17 +1238,21 @@ public: // returns 7*GetWeeks() + GetDays() int GetTotalDays() const { return 7*m_weeks + m_days; } - // arithmetics + // arithmetics with date spans (see also below for more operators) // ------------------------------------------------------------------------ + // return sum of two date spans + inline wxDateSpan Add(const wxDateSpan& other) const; // add another wxDateSpan to us inline wxDateSpan& Add(const wxDateSpan& other); // add another wxDateSpan to us inline wxDateSpan& operator+=(const wxDateSpan& other); - // substract another wxDateSpan from us - inline wxDateSpan& Substract(const wxDateSpan& other); - // substract another wxDateSpan from us + // return difference of two date spans + inline wxDateSpan Subtract(const wxDateSpan& other) const; + // subtract another wxDateSpan from us + inline wxDateSpan& Subtract(const wxDateSpan& other); + // subtract another wxDateSpan from us inline wxDateSpan& operator-=(const wxDateSpan& other); // return a copy of this time span with changed sign @@ -956,8 +1262,12 @@ public: // inverse the sign of this timespan wxDateSpan& operator-() { return Neg(); } + // return the date span proportional to this one with given factor + inline wxDateSpan Multiply(int factor) const; + // multiply all components by a (signed) number + inline wxDateSpan& Multiply(int factor); // multiply all components by a (signed) number - inline wxDateSpan& operator*=(int factor); + inline wxDateSpan& operator*=(int factor) { return Multiply(factor); } private: int m_years, @@ -966,437 +1276,861 @@ private: m_days; }; -WXDLLEXPORT_DATA(extern wxDateSpan) wxYear; -WXDLLEXPORT_DATA(extern wxDateSpan) wxMonth; -WXDLLEXPORT_DATA(extern wxDateSpan) wxWeek; -WXDLLEXPORT_DATA(extern wxDateSpan) wxDay; +// ---------------------------------------------------------------------------- +// wxDateTimeArray: array of dates. +// ---------------------------------------------------------------------------- + +WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDateTime, wxDateTimeArray, WXDLLIMPEXP_BASE); + +// ---------------------------------------------------------------------------- +// wxDateTimeHolidayAuthority: an object of this class will decide whether a +// given date is a holiday and is used by all functions working with "work +// days". +// +// NB: the base class is an ABC, derived classes must implement the pure +// virtual methods to work with the holidays they correspond to. +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority; +WX_DEFINE_USER_EXPORTED_ARRAY_PTR(wxDateTimeHolidayAuthority *, + wxHolidayAuthoritiesArray, + class WXDLLIMPEXP_BASE); + +class wxDateTimeHolidaysModule; +class WXDLLIMPEXP_BASE wxDateTimeHolidayAuthority +{ +friend class wxDateTimeHolidaysModule; +public: + // returns TRUE if the given date is a holiday + static bool IsHoliday(const wxDateTime& dt); + + // fills the provided array with all holidays in the given range, returns + // the number of them + static size_t GetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays); + + // clear the list of holiday authorities + static void ClearAllAuthorities(); + + // add a new holiday authority (the pointer will be deleted by + // wxDateTimeHolidayAuthority) + static void AddAuthority(wxDateTimeHolidayAuthority *auth); + + // the base class must have a virtual dtor + virtual ~wxDateTimeHolidayAuthority(); + +protected: + // this function is called to determine whether a given day is a holiday + virtual bool DoIsHoliday(const wxDateTime& dt) const = 0; + + // this function should fill the array with all holidays between the two + // given dates - it is implemented in the base class, but in a very + // inefficient way (it just iterates over all days and uses IsHoliday() for + // each of them), so it must be overridden in the derived class where the + // base class version may be explicitly used if needed + // + // returns the number of holidays in the given range and fills holidays + // array + virtual size_t DoGetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays) const = 0; + +private: + // all holiday authorities + static wxHolidayAuthoritiesArray ms_authorities; +}; + +// the holidays for this class are all Saturdays and Sundays +class WXDLLIMPEXP_BASE wxDateTimeWorkDays : public wxDateTimeHolidayAuthority +{ +protected: + virtual bool DoIsHoliday(const wxDateTime& dt) const; + virtual size_t DoGetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays) const; +}; // ============================================================================ -// binary operators +// inline functions implementation // ============================================================================ // ---------------------------------------------------------------------------- -// wxDateTime operators +// private macros +// ---------------------------------------------------------------------------- + +#define MILLISECONDS_PER_DAY 86400000l + +// some broken compilers (HP-UX CC) refuse to compile the "normal" version, but +// using a temp variable always might prevent other compilers from optimising +// it away - hence use of this ugly macro +#ifndef __HPUX__ + #define MODIFY_AND_RETURN(op) return wxDateTime(*this).op +#else + #define MODIFY_AND_RETURN(op) wxDateTime dt(*this); dt.op; return dt +#endif + +// ---------------------------------------------------------------------------- +// wxDateTime construction // ---------------------------------------------------------------------------- -inline bool WXDLLEXPORT operator<(const wxDateTime &t1, const wxDateTime &t2) +inline bool wxDateTime::IsInStdRange() const { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + return m_time >= 0l && (m_time / TIME_T_FACTOR) < LONG_MAX; +} - return t1.GetValue() < t2.GetValue(); +/* static */ +inline wxDateTime wxDateTime::Now() +{ + return wxDateTime(*GetTmNow()); } -inline bool WXDLLEXPORT operator<=(const wxDateTime &t1, const wxDateTime &t2) +/* static */ +inline wxDateTime wxDateTime::Today() { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + struct tm *time = GetTmNow(); + time->tm_hour = 0; + time->tm_min = 0; + time->tm_sec = 0; - return t1.GetValue() <= t2.GetValue(); + return wxDateTime(*time); } -inline bool WXDLLEXPORT operator>(const wxDateTime &t1, const wxDateTime &t2) +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +inline wxDateTime& wxDateTime::Set(time_t timet) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + // assign first to avoid long multiplication overflow! + m_time = timet - WX_TIME_BASE_OFFSET ; + m_time *= TIME_T_FACTOR; - return t1.GetValue() > t2.GetValue(); + return *this; +} +#endif + +inline wxDateTime& wxDateTime::SetToCurrent() +{ + *this = Now(); + return *this; } -inline bool WXDLLEXPORT operator>=(const wxDateTime &t1, const wxDateTime &t2) +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +inline wxDateTime::wxDateTime(time_t timet) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + Set(timet); +} +#endif - return t1.GetValue() >= t2.GetValue(); +inline wxDateTime::wxDateTime(const struct tm& tm) +{ + Set(tm); } -inline bool WXDLLEXPORT operator==(const wxDateTime &t1, const wxDateTime &t2) +inline wxDateTime::wxDateTime(const Tm& tm) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + Set(tm); +} - return t1.GetValue() == t2.GetValue(); +inline wxDateTime::wxDateTime(double jdn) +{ + Set(jdn); } -inline bool WXDLLEXPORT operator!=(const wxDateTime &t1, const wxDateTime &t2) +inline wxDateTime& wxDateTime::Set(const Tm& tm) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + wxASSERT_MSG( tm.IsValid(), _T("invalid broken down date/time") ); - return t1.GetValue() != t2.GetValue(); + return Set(tm.mday, (Month)tm.mon, tm.year, tm.hour, tm.min, tm.sec); } -inline wxTimeSpan WXDLLEXPORT operator-(const wxDateTime &t1, - const wxDateTime &t2) +inline wxDateTime::wxDateTime(wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + Set(hour, minute, second, millisec); +} - return wxTimeSpan(t1.GetValue() - t2.GetValue()); +inline wxDateTime::wxDateTime(wxDateTime_t day, + Month month, + int year, + wxDateTime_t hour, + wxDateTime_t minute, + wxDateTime_t second, + wxDateTime_t millisec) +{ + Set(day, month, year, hour, minute, second, millisec); } // ---------------------------------------------------------------------------- -// wxTimeSpan operators +// wxDateTime accessors // ---------------------------------------------------------------------------- -inline wxTimeSpan WXDLLEXPORT operator+(const wxTimeSpan& ts1, - const wxTimeSpan& ts2) +inline wxLongLong wxDateTime::GetValue() const { - return wxTimeSpan(ts1.GetValue() + ts2.GetValue()); + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + return m_time; } -inline wxTimeSpan WXDLLEXPORT operator-(const wxTimeSpan& ts1, - const wxTimeSpan& ts2) +inline time_t wxDateTime::GetTicks() const { - return wxTimeSpan(ts1.GetValue() - ts2.GetValue()); + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + if ( !IsInStdRange() ) + { + return (time_t)-1; + } + + return (time_t)((m_time / (long)TIME_T_FACTOR).GetLo())+WX_TIME_BASE_OFFSET ; } -inline bool WXDLLEXPORT operator<(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline bool wxDateTime::SetToLastWeekDay(WeekDay weekday, + Month month, + int year) { - return t1.GetValue() < t2.GetValue(); + return SetToWeekDay(weekday, -1, month, year); } -inline bool WXDLLEXPORT operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxDateTime +wxDateTime::GetWeekDayInSameWeek(WeekDay weekday, + WeekFlags WXUNUSED(flags)) const { - return t1.GetValue() <= t2.GetValue(); + MODIFY_AND_RETURN( SetToWeekDayInSameWeek(weekday) ); } -inline bool WXDLLEXPORT operator>(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxDateTime wxDateTime::GetNextWeekDay(WeekDay weekday) const { - return t1.GetValue() > t2.GetValue(); + MODIFY_AND_RETURN( SetToNextWeekDay(weekday) ); } -inline bool WXDLLEXPORT operator>=(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxDateTime wxDateTime::GetPrevWeekDay(WeekDay weekday) const { - return t1.GetValue() >= t2.GetValue(); + MODIFY_AND_RETURN( SetToPrevWeekDay(weekday) ); } -inline bool WXDLLEXPORT operator==(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxDateTime wxDateTime::GetWeekDay(WeekDay weekday, + int n, + Month month, + int year) const { - return t1.GetValue() == t2.GetValue(); + wxDateTime dt(*this); + + return dt.SetToWeekDay(weekday, n, month, year) ? dt : wxInvalidDateTime; } -inline bool WXDLLEXPORT operator!=(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxDateTime wxDateTime::GetLastWeekDay(WeekDay weekday, + Month month, + int year) { - return t1.GetValue() != t2.GetValue(); + wxDateTime dt(*this); + + return dt.SetToLastWeekDay(weekday, month, year) ? dt : wxInvalidDateTime; } -// ---------------------------------------------------------------------------- -// wxDateSpan -// ---------------------------------------------------------------------------- +inline wxDateTime wxDateTime::GetWeek(wxDateTime_t numWeek, + WeekDay weekday, + WeekFlags flags) const +{ + wxDateTime dt(*this); -inline WXDLLEXPORT wxDateSpan operator+(const wxDateSpan& rt1, - const wxDateSpan& rt2) + return dt.SetToTheWeek(numWeek, weekday, flags) ? dt : wxInvalidDateTime; +} + +inline wxDateTime wxDateTime::GetLastMonthDay(Month month, int year) const { - return wxDateSpan(rt1.GetYears() + rt2.GetYears(), - rt1.GetMonths() + rt2.GetMonths(), - rt1.GetWeeks() + rt2.GetWeeks(), - rt1.GetDays() + rt2.GetDays()); + MODIFY_AND_RETURN( SetToLastMonthDay(month, year) ); } -// ============================================================================ -// inline functions implementation -// ============================================================================ +inline wxDateTime wxDateTime::GetYearDay(wxDateTime_t yday) const +{ + MODIFY_AND_RETURN( SetToYearDay(yday) ); +} // ---------------------------------------------------------------------------- -// wxDateTime statics +// wxDateTime comparison // ---------------------------------------------------------------------------- -/* static */ -wxDateTime::Country wxDateTime::GetCountry() +inline bool wxDateTime::IsEqualTo(const wxDateTime& datetime) const +{ + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return m_time == datetime.m_time; +} + +inline bool wxDateTime::IsEarlierThan(const wxDateTime& datetime) const +{ + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return m_time < datetime.m_time; +} + +inline bool wxDateTime::IsLaterThan(const wxDateTime& datetime) const +{ + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return m_time > datetime.m_time; +} + +inline bool wxDateTime::IsStrictlyBetween(const wxDateTime& t1, + const wxDateTime& t2) const +{ + // no need for assert, will be checked by the functions we call + return IsLaterThan(t1) && IsEarlierThan(t2); +} + +inline bool wxDateTime::IsBetween(const wxDateTime& t1, + const wxDateTime& t2) const { - return ms_country; + // no need for assert, will be checked by the functions we call + return IsEqualTo(t1) || IsEqualTo(t2) || IsStrictlyBetween(t1, t2); +} + +inline bool wxDateTime::IsSameDate(const wxDateTime& dt) const +{ + Tm tm1 = GetTm(), + tm2 = dt.GetTm(); + + return tm1.year == tm2.year && + tm1.mon == tm2.mon && + tm1.mday == tm2.mday; +} + +inline bool wxDateTime::IsSameTime(const wxDateTime& dt) const +{ + // notice that we can't do something like this: + // + // m_time % MILLISECONDS_PER_DAY == dt.m_time % MILLISECONDS_PER_DAY + // + // because we have also to deal with (possibly) different DST settings! + Tm tm1 = GetTm(), + tm2 = dt.GetTm(); + + return tm1.hour == tm2.hour && + tm1.min == tm2.min && + tm1.sec == tm2.sec && + tm1.msec == tm2.msec; +} + +inline bool wxDateTime::IsEqualUpTo(const wxDateTime& dt, + const wxTimeSpan& ts) const +{ + return IsBetween(dt.Subtract(ts), dt.Add(ts)); } // ---------------------------------------------------------------------------- -// wxDateTime construction +// wxDateTime arithmetics // ---------------------------------------------------------------------------- -// only define this once, when included from datetime.cpp -#ifdef wxDEFINE_TIME_CONSTANTS - const unsigned int wxDateTime::TIME_T_FACTOR = 1000; -#endif // wxDEFINE_TIME_CONSTANTS +inline wxDateTime wxDateTime::Add(const wxTimeSpan& diff) const +{ + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + return wxDateTime(m_time + diff.GetValue()); +} -wxDateTime::IsInStdRange() const +inline wxDateTime& wxDateTime::Add(const wxTimeSpan& diff) { - return m_time >= 0l && (m_time / (long)TIME_T_FACTOR) < LONG_MAX; + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + m_time += diff.GetValue(); + + return *this; } -/* static */ -wxDateTime wxDateTime::Now() +inline wxDateTime& wxDateTime::operator+=(const wxTimeSpan& diff) { - return wxDateTime(GetTimeNow()); + return Add(diff); } -wxDateTime& wxDateTime::Set(time_t timet) +inline wxDateTime wxDateTime::Subtract(const wxTimeSpan& diff) const { - m_time = timet * TIME_T_FACTOR; + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + return wxDateTime(m_time - diff.GetValue()); +} + +inline wxDateTime& wxDateTime::Subtract(const wxTimeSpan& diff) +{ + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + m_time -= diff.GetValue(); return *this; } -wxDateTime& wxDateTime::SetToCurrent() +inline wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff) { - return Set(GetTimeNow()); + return Subtract(diff); } -wxDateTime::wxDateTime(time_t timet) +inline wxTimeSpan wxDateTime::Subtract(const wxDateTime& datetime) const { - Set(timet); + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return wxTimeSpan(GetValue() - datetime.GetValue()); } -wxDateTime::wxDateTime(const struct tm& tm) +inline wxDateTime wxDateTime::Add(const wxDateSpan& diff) const { - Set(tm); + return wxDateTime(*this).Add(diff); } -wxDateTime::wxDateTime(const Tm& tm) +inline wxDateTime& wxDateTime::Subtract(const wxDateSpan& diff) { - Set(tm); + return Add(diff.Negate()); } -wxDateTime& wxDateTime::Set(const Tm& tm) +inline wxDateTime wxDateTime::Subtract(const wxDateSpan& diff) const { - wxASSERT_MSG( tm.IsValid(), _T("invalid broken down date/time") ); + return wxDateTime(*this).Subtract(diff); +} - return Set(tm.mday, (Month)tm.mon, tm.year, tm.hour, tm.min, tm.sec); +inline wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff) +{ + return Subtract(diff); } -wxDateTime::wxDateTime(wxDateTime_t hour, - wxDateTime_t minute, - wxDateTime_t second, - wxDateTime_t millisec) +inline wxDateTime& wxDateTime::operator+=(const wxDateSpan& diff) { - Set(hour, minute, second, millisec); + return Add(diff); } -wxDateTime::wxDateTime(wxDateTime_t day, - Month month, - int year, - wxDateTime_t hour, - wxDateTime_t minute, - wxDateTime_t second, - wxDateTime_t millisec) +// ---------------------------------------------------------------------------- +// wxDateTime and timezones +// ---------------------------------------------------------------------------- + +inline wxDateTime wxDateTime::ToTimezone(const wxDateTime::TimeZone& tz, + bool noDST) const { - Set(day, month, year, hour, minute, second, millisec); + MODIFY_AND_RETURN( MakeTimezone(tz, noDST) ); } // ---------------------------------------------------------------------------- -// wxDateTime accessors +// wxTimeSpan construction // ---------------------------------------------------------------------------- -wxLongLong wxDateTime::GetValue() const +inline wxTimeSpan::wxTimeSpan(long hours, + long minutes, + long seconds, + long milliseconds) { - wxASSERT_MSG( IsValid(), "invalid wxDateTime"); + // assign first to avoid precision loss + m_diff = hours; + m_diff *= 60l; + m_diff += minutes; + m_diff *= 60l; + m_diff += seconds; + m_diff *= 1000l; + m_diff += milliseconds; +} - return m_time; +// ---------------------------------------------------------------------------- +// wxTimeSpan accessors +// ---------------------------------------------------------------------------- + +inline wxLongLong wxTimeSpan::GetSeconds() const +{ + return m_diff / 1000l; } -time_t wxDateTime::GetTicks() const +inline int wxTimeSpan::GetMinutes() const { - wxASSERT_MSG( IsValid(), "invalid wxDateTime"); - if ( !IsInStdRange() ) - { - return (time_t)-1; - } + return (GetSeconds() / 60l).GetLo(); +} + +inline int wxTimeSpan::GetHours() const +{ + return GetMinutes() / 60; +} - return (time_t)((m_time / (long)TIME_T_FACTOR).GetLo()); +inline int wxTimeSpan::GetDays() const +{ + return GetHours() / 24; } -bool wxDateTime::SetToLastWeekDay(WeekDay weekday, - wxDateTime_t month, - int year) +inline int wxTimeSpan::GetWeeks() const { - SetToWeekDay(weekday, -1, month, year); + return GetDays() / 7; } // ---------------------------------------------------------------------------- -// wxDateTime comparison +// wxTimeSpan arithmetics // ---------------------------------------------------------------------------- -bool wxDateTime::IsEqualTo(const wxDateTime& datetime) const +inline wxTimeSpan wxTimeSpan::Add(const wxTimeSpan& diff) const { - wxASSERT_MSG( IsValid() && datetime.IsValid(), "invalid wxDateTime"); + return wxTimeSpan(m_diff + diff.GetValue()); +} - return m_time == datetime.m_time; +inline wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff) +{ + m_diff += diff.GetValue(); + + return *this; } -bool wxDateTime::operator==(const wxDateTime& datetime) const +inline wxTimeSpan wxTimeSpan::Subtract(const wxTimeSpan& diff) const { - return IsEqualTo(datetime); + return wxTimeSpan(m_diff - diff.GetValue()); } -bool wxDateTime::operator!=(const wxDateTime& datetime) const +inline wxTimeSpan& wxTimeSpan::Subtract(const wxTimeSpan& diff) { - return !IsEqualTo(datetime); + m_diff -= diff.GetValue(); + + return *this; } -bool wxDateTime::IsEarlierThan(const wxDateTime& datetime) const +inline wxTimeSpan& wxTimeSpan::Multiply(int n) { - wxASSERT_MSG( IsValid() && datetime.IsValid(), "invalid wxDateTime"); + m_diff *= (long)n; - return m_time < datetime.m_time; + return *this; } -bool wxDateTime::IsLaterThan(const wxDateTime& datetime) const +inline wxTimeSpan wxTimeSpan::Multiply(int n) const { - wxASSERT_MSG( IsValid() && datetime.IsValid(), "invalid wxDateTime"); + return wxTimeSpan(m_diff * (long)n); +} - return m_time > datetime.m_time; +inline wxTimeSpan wxTimeSpan::Abs() const +{ + return wxTimeSpan(GetValue().Abs()); } -bool wxDateTime::IsStrictlyBetween(const wxDateTime& t1, - const wxDateTime& t2) const +inline bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const { - // no need for assert, will be checked by the functions we call - return IsLaterThan(t1) && IsEarlierThan(t2); + return GetValue() == ts.GetValue(); } -bool wxDateTime::IsBetween(const wxDateTime& t1, const wxDateTime& t2) const +inline bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const { - // no need for assert, will be checked by the functions we call - return IsEqualTo(t1) || IsEqualTo(t2) || IsStrictlyBetween(t1, t2); + return GetValue().Abs() > ts.GetValue().Abs(); } // ---------------------------------------------------------------------------- -// wxDateTime arithmetics +// wxDateSpan // ---------------------------------------------------------------------------- -wxDateTime& wxDateTime::Add(const wxTimeSpan& diff) +inline wxDateSpan& wxDateSpan::operator+=(const wxDateSpan& other) +{ + m_years += other.m_years; + m_months += other.m_months; + m_weeks += other.m_weeks; + m_days += other.m_days; + + return *this; +} + +inline wxDateSpan& wxDateSpan::Add(const wxDateSpan& other) { - wxASSERT_MSG( IsValid(), "invalid wxDateTime"); + return *this += other; +} - m_time += diff.GetValue(); +inline wxDateSpan wxDateSpan::Add(const wxDateSpan& other) const +{ + wxDateSpan ds(*this); + ds.Add(other); + return ds; +} + +inline wxDateSpan& wxDateSpan::Multiply(int factor) +{ + m_years *= factor; + m_months *= factor; + m_weeks *= factor; + m_days *= factor; return *this; } -wxDateTime& wxDateTime::operator+=(const wxTimeSpan& diff) +inline wxDateSpan wxDateSpan::Multiply(int factor) const { - return Add(diff); + wxDateSpan ds(*this); + ds.Multiply(factor); + return ds; } -wxDateTime& wxDateTime::Substract(const wxTimeSpan& diff) +inline wxDateSpan wxDateSpan::Negate() const { - wxASSERT_MSG( IsValid(), "invalid wxDateTime"); + return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days); +} - m_time -= diff.GetValue(); +inline wxDateSpan& wxDateSpan::Neg() +{ + m_years = -m_years; + m_months = -m_months; + m_weeks = -m_weeks; + m_days = -m_days; return *this; } -wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff) +inline wxDateSpan& wxDateSpan::operator-=(const wxDateSpan& other) { - return Substract(diff); + return *this += other.Negate(); } -wxTimeSpan wxDateTime::Substract(const wxDateTime& datetime) const +inline wxDateSpan& wxDateSpan::Subtract(const wxDateSpan& other) { - wxASSERT_MSG( IsValid() && datetime.IsValid(), "invalid wxDateTime"); + return *this -= other; +} - return wxTimeSpan(datetime.GetValue() - GetValue()); +inline wxDateSpan wxDateSpan::Subtract(const wxDateSpan& other) const +{ + wxDateSpan ds(*this); + ds.Subtract(other); + return ds; } -wxTimeSpan wxDateTime::operator-(const wxDateTime& datetime) const +#undef MILLISECONDS_PER_DAY + +#undef MODIFY_AND_RETURN + +// ============================================================================ +// binary operators +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxDateTime operators +// ---------------------------------------------------------------------------- + +// arithmetics +// ----------- + +// no need to check for validity - the member functions we call will do it + +inline wxDateTime WXDLLIMPEXP_BASE operator+(const wxDateTime& dt, + const wxTimeSpan& ts) { - return Substract(datetime); + return dt.Add(ts); } -wxDateTime& wxDateTime::Substract(const wxDateSpan& diff) +inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt, + const wxTimeSpan& ts) { - return Add(diff.Negate()); + return dt.Subtract(ts); } -wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff) +inline wxDateTime WXDLLIMPEXP_BASE operator+(const wxDateTime& dt, + const wxDateSpan& ds) { - return Substract(diff); + return dt.Add(ds); } -wxDateTime& wxDateTime::operator+=(const wxDateSpan& diff) +inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt, + const wxDateSpan& ds) { - return Add(diff); + return dt.Subtract(ds); +} + +inline wxTimeSpan WXDLLIMPEXP_BASE operator-(const wxDateTime& dt1, + const wxDateTime& dt2) +{ + return dt1.Subtract(dt2); +} + +// comparison +// ---------- + +inline bool WXDLLIMPEXP_BASE operator<(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() < t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator<=(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() <= t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator>(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() > t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator>=(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() >= t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator==(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() == t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator!=(const wxDateTime& t1, const wxDateTime& t2) +{ + wxASSERT_MSG( t1.IsValid() && t2.IsValid(), _T("invalid wxDateTime") ); + + return t1.GetValue() != t2.GetValue(); } // ---------------------------------------------------------------------------- -// wxTimeSpan +// wxTimeSpan operators // ---------------------------------------------------------------------------- -wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff) -{ - m_diff += diff.GetValue(); +// arithmetics +// ----------- - return *this; +inline wxTimeSpan WXDLLIMPEXP_BASE operator+(const wxTimeSpan& ts1, + const wxTimeSpan& ts2) +{ + return wxTimeSpan(ts1.GetValue() + ts2.GetValue()); } -wxTimeSpan& wxTimeSpan::Substract(const wxTimeSpan& diff) +inline wxTimeSpan WXDLLIMPEXP_BASE operator-(const wxTimeSpan& ts1, + const wxTimeSpan& ts2) { - m_diff -= diff.GetValue(); + return wxTimeSpan(ts1.GetValue() - ts2.GetValue()); +} - return *this; +inline wxTimeSpan WXDLLIMPEXP_BASE operator*(const wxTimeSpan& ts, int n) +{ + return wxTimeSpan(ts).Multiply(n); } -wxTimeSpan& wxTimeSpan::Multiply(int n) +inline wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts) { - m_diff *= n; + return wxTimeSpan(ts).Multiply(n); +} - return *this; +// comparison +// ---------- + +inline bool WXDLLIMPEXP_BASE operator<(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() < t2.GetValue(); } -wxTimeSpan wxTimeSpan::operator*(int n) const +inline bool WXDLLIMPEXP_BASE operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2) { - wxTimeSpan result(*this); - result.Multiply(n); + return t1.GetValue() <= t2.GetValue(); +} - return result; +inline bool WXDLLIMPEXP_BASE operator>(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() > t2.GetValue(); } -wxTimeSpan wxTimeSpan::Abs() const +inline bool WXDLLIMPEXP_BASE operator>=(const wxTimeSpan &t1, const wxTimeSpan &t2) { - return wxTimeSpan(GetValue().Abs()); + return t1.GetValue() >= t2.GetValue(); } -bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const +inline bool WXDLLIMPEXP_BASE operator==(const wxTimeSpan &t1, const wxTimeSpan &t2) { - return GetValue() == ts.GetValue(); + return t1.GetValue() == t2.GetValue(); } -bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const +inline bool WXDLLIMPEXP_BASE operator!=(const wxTimeSpan &t1, const wxTimeSpan &t2) { - return Abs() > ts.Abs(); + return t1.GetValue() != t2.GetValue(); } // ---------------------------------------------------------------------------- // wxDateSpan // ---------------------------------------------------------------------------- -wxDateSpan& -wxDateSpan::operator+=(const wxDateSpan& other) +// comparison +// ---------- + +// ds1 == d2 if and only if for every wxDateTime t t + ds1 == t + ds2 +inline WXDLLIMPEXP_BASE bool operator==(const wxDateSpan& ds1, + const wxDateSpan& ds2) { - m_years += other.m_years; - m_months += other.m_months; - m_weeks += other.m_weeks; - m_days += other.m_days; + return ds1.GetYears() == ds2.GetYears() && + ds1.GetMonths() == ds2.GetMonths() && + ds1.GetTotalDays() == ds2.GetTotalDays(); +} - return *this; +inline WXDLLIMPEXP_BASE bool operator!=(const wxDateSpan& ds1, + const wxDateSpan& ds2) +{ + return !(ds1 == ds2); } -wxDateSpan& wxDateSpan::operator*=(int factor) +// arithmetics +// ----------- + +inline WXDLLIMPEXP_BASE wxDateSpan operator+(const wxDateSpan& ds1, + const wxDateSpan& ds2) { - m_years *= m_years; - m_months *= m_months; - m_weeks *= m_weeks; - m_days *= m_days; + return wxDateSpan(ds1.GetYears() + ds2.GetYears(), + ds1.GetMonths() + ds2.GetMonths(), + ds1.GetWeeks() + ds2.GetWeeks(), + ds1.GetDays() + ds2.GetDays()); +} - return *this; +inline WXDLLIMPEXP_BASE wxDateSpan operator-(const wxDateSpan& ds1, + const wxDateSpan& ds2) +{ + return wxDateSpan(ds1.GetYears() - ds2.GetYears(), + ds1.GetMonths() - ds2.GetMonths(), + ds1.GetWeeks() - ds2.GetWeeks(), + ds1.GetDays() - ds2.GetDays()); } -wxDateSpan wxDateSpan::Negate() const +inline WXDLLIMPEXP_BASE wxDateSpan operator*(const wxDateSpan& ds, int n) { - return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days); + return wxDateSpan(ds).Multiply(n); } -wxDateSpan& wxDateSpan::Neg() +inline WXDLLIMPEXP_BASE wxDateSpan operator*(int n, const wxDateSpan& ds) { - m_years = -m_years; - m_months = -m_months; - m_weeks = -m_weeks; - m_days = -m_days; + return wxDateSpan(ds).Multiply(n); +} - return *this; +// ============================================================================ +// 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) ) +// ---------------------------------------------------------------------------- + +inline WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m) +{ + wxASSERT_MSG( m < wxDateTime::Inv_Month, _T("invalid month") ); + + // no wrapping or the for loop above would never end! + m = (wxDateTime::Month)(m + 1); } -#endif // _WX_TIME_H +inline WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m) +{ + wxASSERT_MSG( m < wxDateTime::Inv_Month, _T("invalid month") ); + + m = m == wxDateTime::Jan ? wxDateTime::Inv_Month + : (wxDateTime::Month)(m - 1); +} + +inline WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd) +{ + wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, _T("invalid week day") ); + + // no wrapping or the for loop above would never end! + wd = (wxDateTime::WeekDay)(wd + 1); +} + +inline WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd) +{ + wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, _T("invalid week day") ); + + wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay + : (wxDateTime::WeekDay)(wd - 1); +} + +#endif // wxUSE_DATETIME + +#endif // _WX_DATETIME_H