X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0979c96223f89cc3b12b9bfab37092579a2b4073..0a7b481fee70afb6736a9a19edcadbc679bdfb2f:/include/wx/datetime.h diff --git a/include/wx/datetime.h b/include/wx/datetime.h index ff3f5db6de..3004de66b1 100644 --- a/include/wx/datetime.h +++ b/include/wx/datetime.h @@ -7,34 +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 @@ -52,41 +75,66 @@ 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 TimeZone + enum TZ { // the time in the current time zone Local, @@ -104,10 +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 @@ -245,17 +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 { @@ -271,7 +370,89 @@ public: // invalid value for the year enum Year { - Inv_Year = INT_MIN + 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 + // + // 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 msec, sec, min, hour, mday; + Month mon; + int year; + + // default ctor inits the object to an invalid value + 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; + + // get the week day + WeekDay GetWeekDay() // not const because wday may be changed + { + if ( wday == Inv_WeekDay ) + ComputeWeekDay(); + + 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; }; // static methods @@ -282,6 +463,10 @@ public: // get the current country 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); @@ -294,10 +479,14 @@ public: // return the current month static Month GetCurrentMonth(Calendar cal = Gregorian); - // returns TRUE if the given year is a leap year in the given calendar - static bool IsLeapYear(int year, Calendar cal = Gregorian); + // returns true if the given year is a leap year in the given calendar + static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian); - // returns the number of days in this year (356 or 355 typically :-) + // 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 :-) static wxDateTime_t GetNumberOfDays(int year, Calendar cal = Gregorian); // get the number of the days in the given month (default value for @@ -306,20 +495,44 @@ public: int year = Inv_Year, Calendar cal = Gregorian); - // get the month name in the current locale - static wxString GetMonthName(Month month); + // get the full (default) or abbreviated month name in the current + // locale, returns empty string on error + 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, + NameFlags flags = Name_Full); - // get the weekday name in the current locale - static wxString GetDayOfWeekName(WeekDay weekday); + // 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 @@ -327,12 +540,20 @@ public: // ------------------------------------------------------------------------ // 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); - // from broken down time/date +#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, @@ -340,8 +561,8 @@ public: wxDateTime_t second = 0, wxDateTime_t millisec = 0); // from separate values for each component with explicit date - inline wxDateTime(wxDateTime_t day, - Month month = Inv_Month, + inline wxDateTime(wxDateTime_t day, // day of the month + Month month, int year = Inv_Year, // 1999, not 99 please! wxDateTime_t hour = 0, wxDateTime_t minute = 0, @@ -360,12 +581,21 @@ 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); + // 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, @@ -375,7 +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, @@ -409,33 +639,71 @@ public: // assignment operator from broken down time/date wxDateTime& operator=(const struct tm& tm) { return Set(tm); } + // assignment operator from broken down time/date + wxDateTime& operator=(const Tm& tm) { return Set(tm); } + // default assignment operator is ok // calendar calculations (functions which set the date only leave the time - // unchanged, e.g. don't explictly zero it) + // 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 + // 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. + // 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 // @@ -459,16 +727,52 @@ 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: 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. + // ------------------------------------------------------------------------ + + // transform to any given timezone + inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = false) const; + wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = false); + + // transform to GMT/UTC + wxDateTime ToGMT(bool noDST = false) const { return ToTimezone(GMT0, noDST); } + wxDateTime& MakeGMT(bool noDST = false) { return MakeTimezone(GMT0, noDST); } + + // 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 // to do it for the current timezone of this machine (even if the function @@ -476,212 +780,293 @@ 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 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(TimeZone zone = Local) const; + int GetYear(const TimeZone& tz = Local) const + { return GetTm(tz).year; } // get the month (Inv_Month if date is invalid) - Month GetMonth(TimeZone zone = Local) const; + 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(TimeZone zone = Local) const; + 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(TimeZone zone = Local) const; + WeekDay GetWeekDay(const TimeZone& tz = Local) const + { return GetTm(tz).GetWeekDay(); } // get the hour of the day - wxDateTime_t GetHour(TimeZone zone = Local) const; + wxDateTime_t GetHour(const TimeZone& tz = Local) const + { return GetTm(tz).hour; } // get the minute - wxDateTime_t GetMinute(TimeZone zone = Local) const; + wxDateTime_t GetMinute(const TimeZone& tz = Local) const + { return GetTm(tz).min; } // get the second - wxDateTime_t GetSecond(TimeZone zone = Local) const; + wxDateTime_t GetSecond(const TimeZone& tz = Local) const + { return GetTm(tz).sec; } // get milliseconds - wxDateTime_t GetMillisecond(TimeZone zone = Local) const; + 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 = Current, 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 = Gregorian_Standard) const; + 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) // ------------------------------------------------------------------------ - // returns TRUE if the date is strictly earlier than the given one - bool IsEarlierThan(const wxDateTime& datetime) const; + // returns true if the two moments are strictly identical + inline bool IsEqualTo(const wxDateTime& datetime) const; + + // returns true if the date is strictly earlier than the given one + inline bool IsEarlierThan(const wxDateTime& datetime) const; - // returns TRUE if the date is strictly later than the given one - bool IsLaterThan(const wxDateTime& datetime) const; + // returns true if the date is strictly later than the given one + inline bool IsLaterThan(const wxDateTime& datetime) const; - // returns TRUE if the date is strictly in the given range - bool IsStrictlyBetween(const wxDateTime& t1, const wxDateTime& t2) const; - // returns TRUE if the date is in the given range - bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; + // returns true if the date is strictly in the given range + inline bool IsStrictlyBetween(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) + // returns true if the date is in the given range + inline bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; + + // 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) - wxDateTime& Add(const wxTimeSpan& diff); + inline wxDateTime& Add(const wxTimeSpan& diff); // add a time span (positive or negative) - wxDateTime& operator+=(const wxTimeSpan& diff) { return Add(diff); } + 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) - wxDateTime& operator+=(const wxDateSpan& diff) { return Add(diff); } + 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) - wxTimeSpan Substract(const wxDateTime& datetime) const; - // substract a date (may result in positive or negative time span) - 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 char *format = "%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("%x"); } + wxString FormatDate() const { return Format(_T("%x")); } // preferred time representation for the current locale - wxString FormatTime() const { return Format("%X"); } + 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 load balancing system), this is a static - // member: see SetCountry() and GetCountry() + // it runs on a _really_ big cluster system :-), this is a static member: + // see SetCountry() and GetCountry() static Country ms_country; - // the internal representation of the time is the amount of milliseconds - // elapsed since the origin which is set by convention to the UNIX/C epoch - // value: the midnight of on January 1, 1970 (UTC) - wxLongLong m_time; - // this constant is used to transform a time_t value to the internal // representation, as time_t is in seconds and we use milliseconds it's // fixed to 1000 - static const int TIME_T_FACTOR; + static const long TIME_T_FACTOR; - // invalid wxDateTime object - returned by all functions which return - // "wxDateTime &" on failure - static wxDateTime ms_InvDateTime; + // returns true if we fall in range in which we can use standard ANSI C + // functions + 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 + // value: the midnight of January 1, 1970 (UTC) + wxLongLong m_time; }; // ---------------------------------------------------------------------------- // 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); } - // add two timespans together - inline wxTimeSpan operator+(const wxTimeSpan& ts1, const wxTimeSpan& ts2); - // substract another timespan - inline wxTimeSpan& Substract(const wxTimeSpan& diff); - // substract another timespan - wxTimeSpan& operator-=(const wxTimeSpan& diff) { return Substract(diff); } - // substract two timespans - inline wxTimeSpan operator-(const wxTimeSpan& ts1, const wxTimeSpan& ts2); + // 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() { return wxTimeSpan(-GetValue()); } + wxTimeSpan Negate() const { return wxTimeSpan(-GetValue()); } // negate the value of the timespan wxTimeSpan& Neg() { m_diff = -GetValue(); return *this; } // negate the value of the timespan @@ -698,37 +1083,30 @@ public: // ------------------------------------------------------------------------ // is the timespan null? - bool IsNull() const { return m_diff == 0; } + bool IsNull() const { return m_diff == 0l; } // returns true if the timespan is null bool operator!() const { return !IsNull(); } // is the timespan positive? - bool IsPositive() const { return m_diff > 0; } + bool IsPositive() const { return m_diff > 0l; } // is the timespan negative? - bool IsNegative() const { return m_diff < 0; } + bool IsNegative() const { return m_diff < 0l; } // are two timespans equal? inline bool IsEqualTo(const wxTimeSpan& ts) const; // compare two timestamps: works with the absolute values, i.e. -2 - // hours is longer than 1 hour. Also, it will return FALSE if the + // hours is longer than 1 hour. Also, it will return false if the // timespans are equal in absolute value. inline bool IsLongerThan(const wxTimeSpan& ts) const; // compare two timestamps: works with the absolute values, i.e. 1 - // hour is shorter than -2 hours. Also, it will return FALSE if the + // hour is shorter than -2 hours. Also, it will return false if the // timespans are equal in absolute value. bool IsShorterThan(const wxTimeSpan& t) const { return !IsLongerThan(t); } - // breaking into years, ..., days, ..., seconds: all these functions - // behave like GetYears() which returns 1 for the timespan of 1 year and 1 - // day, but 0 (and not -1) for the negative timespan of 1 year without 1 - // day. IOW, (ts - wxTimeSpan(ts.GetYears())).GetYears() is always 0. + // 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 @@ -738,9 +1116,9 @@ 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 - int GetMilliseconds() const { return m_diff; } + wxLongLong GetMilliseconds() const { return m_diff; } // conversion to text // ------------------------------------------------------------------------ @@ -751,15 +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; } @@ -776,7 +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 @@ -787,18 +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 @@ -808,13 +1219,13 @@ public: // ------------------------------------------------------------------------ // set number of years - wxDateSpan& SetYears(int n) { m_years = n; return this; } + wxDateSpan& SetYears(int n) { m_years = n; return *this; } // set number of months - wxDateSpan& SetMonths(int n) { m_months = n; return this; } + wxDateSpan& SetMonths(int n) { m_months = n; return *this; } // set number of weeks - wxDateSpan& SetWeeks(int n) { m_weeks = n; return this; } + wxDateSpan& SetWeeks(int n) { m_weeks = n; return *this; } // set number of days - wxDateSpan& SetDays(int n) { m_days = n; return this; } + wxDateSpan& SetDays(int n) { m_days = n; return *this; } // get number of years int GetYears() const { return m_years; } @@ -827,17 +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 @@ -847,8 +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& operator*=(int factor); + inline wxDateSpan& Multiply(int factor); + // multiply all components by a (signed) number + inline wxDateSpan& operator*=(int factor) { return Multiply(factor); } private: int m_years, @@ -857,260 +1276,542 @@ 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 // ---------------------------------------------------------------------------- -inline bool WXDLLEXPORT operator<(const wxDateTime &t1, const wxDateTime &t2) +#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 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 bool WXDLLEXPORT operator>=(const wxDateTime &t1, const wxDateTime &t2) +inline wxDateTime& wxDateTime::SetToCurrent() { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + *this = Now(); + return *this; +} - return t1.GetValue() >= t2.GetValue() +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +inline wxDateTime::wxDateTime(time_t timet) +{ + Set(timet); } +#endif -inline bool WXDLLEXPORT operator==(const wxDateTime &t1, const wxDateTime &t2) +inline wxDateTime::wxDateTime(const struct tm& tm) { - wxASSERT_MSG( t1.IsValid() && t2.IsValid(), "invalid wxDateTime" ); + Set(tm); +} - return t1.GetValue() == t2.GetValue() +inline wxDateTime::wxDateTime(const Tm& tm) +{ + Set(tm); +} + +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 bool WXDLLEXPORT operator<(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline wxLongLong wxDateTime::GetValue() const { - return t1.GetValue() < t2.GetValue() + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + return m_time; } -inline bool WXDLLEXPORT operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2) +inline time_t wxDateTime::GetTicks() const { - return t1.GetValue() <= t2.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 wxDateTime wxDateTime::GetWeekDay(WeekDay weekday, + int n, + Month month, + int year) const +{ + wxDateTime dt(*this); + + return dt.SetToWeekDay(weekday, n, month, year) ? dt : wxInvalidDateTime; +} + +inline wxDateTime wxDateTime::GetLastWeekDay(WeekDay weekday, + Month month, + int year) +{ + wxDateTime dt(*this); + + return dt.SetToLastWeekDay(weekday, month, year) ? dt : wxInvalidDateTime; +} + +inline wxDateTime wxDateTime::GetWeek(wxDateTime_t numWeek, + WeekDay weekday, + WeekFlags flags) const +{ + wxDateTime dt(*this); + + return dt.SetToTheWeek(numWeek, weekday, flags) ? dt : wxInvalidDateTime; +} + +inline wxDateTime wxDateTime::GetLastMonthDay(Month month, int year) const +{ + MODIFY_AND_RETURN( SetToLastMonthDay(month, year) ); +} + +inline wxDateTime wxDateTime::GetYearDay(wxDateTime_t yday) const +{ + MODIFY_AND_RETURN( SetToYearDay(yday) ); } // ---------------------------------------------------------------------------- -// wxDateSpan +// wxDateTime comparison // ---------------------------------------------------------------------------- -inline WXDLLEXPORT wxDateSpan operator+(const wxDateSpan& rt1, - const wxDateSpan& rt2) +inline bool wxDateTime::IsEqualTo(const wxDateTime& datetime) const { - return wxDateSpan(rt1.m_years + rt2.m_years, - rt1.m_months + rt2.m_months, - rt1.m_weeks + rt2.m_weeks, - rt1.m_days + rt2.m_days); + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return m_time == datetime.m_time; } -// ============================================================================ -// inline functions implementation -// ============================================================================ +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 +{ + // 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 +// wxDateTime arithmetics // ---------------------------------------------------------------------------- -const int wxDateTime::TIME_T_FACTOR = 1000; +inline wxDateTime wxDateTime::Add(const wxTimeSpan& diff) const +{ + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); -wxDateTime& Set(time_t timet) + return wxDateTime(m_time + diff.GetValue()); +} + +inline wxDateTime& wxDateTime::Add(const wxTimeSpan& diff) { - m_time = timet * wxDateTime::TIME_T_FACTOR; + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + m_time += diff.GetValue(); return *this; } -wxDateTime& SetToCurrent() +inline wxDateTime& wxDateTime::operator+=(const wxTimeSpan& diff) { - return Set(GetTimeNow()); + return Add(diff); } -wxDateTime::wxDateTime(time_t timet) +inline wxDateTime wxDateTime::Subtract(const wxTimeSpan& diff) const { - Set(timet); + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + return wxDateTime(m_time - diff.GetValue()); } -wxDateTime::wxDateTime(const struct tm& tm) +inline wxDateTime& wxDateTime::Subtract(const wxTimeSpan& diff) { - Set(tm); + wxASSERT_MSG( IsValid(), _T("invalid wxDateTime")); + + m_time -= diff.GetValue(); + + return *this; } -wxDateTime::wxDateTime(wxDateTime_t hour, - wxDateTime_t minute, - wxDateTime_t second, - wxDateTime_t millisec) +inline wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff) { - Set(hour, minute, second, millisec); + return Subtract(diff); } -wxDateTime::wxDateTime(wxDateTime_t day, - Month month, - int year, - wxDateTime_t hour, - wxDateTime_t minute, - wxDateTime_t second, - wxDateTime_t millisec) +inline wxTimeSpan wxDateTime::Subtract(const wxDateTime& datetime) const { - Set(day, month, year, hour, minute, second, millisec); + wxASSERT_MSG( IsValid() && datetime.IsValid(), _T("invalid wxDateTime")); + + return wxTimeSpan(GetValue() - datetime.GetValue()); } -wxLongLong wxDateTime::GetValue() const +inline wxDateTime wxDateTime::Add(const wxDateSpan& diff) const { - wxASSERT_MSG( IsValid(), "invalid wxDateTime"); + return wxDateTime(*this).Add(diff); +} - return m_time; +inline wxDateTime& wxDateTime::Subtract(const wxDateSpan& diff) +{ + return Add(diff.Negate()); } -bool wxDateTime::SetToLastWeekDay(WeekDay weekday, - wxDateTime_t month, - int year) +inline wxDateTime wxDateTime::Subtract(const wxDateSpan& diff) const { - SetToWeekDay(weekday, -1, month, year); + return wxDateTime(*this).Subtract(diff); } -wxDateTime& wxDateTime::Substract(const wxTimeSpan& diff) +inline wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff) { - return Add(diff.Negate()); + return Subtract(diff); } -wxDateTime& wxDateTime::operator-=(const wxTimeSpan& diff) +inline wxDateTime& wxDateTime::operator+=(const wxDateSpan& diff) { - return Add(diff.Negate()); + return Add(diff); } -wxDateTime& wxDateTime::Substract(const wxDateSpan& diff) +// ---------------------------------------------------------------------------- +// wxDateTime and timezones +// ---------------------------------------------------------------------------- + +inline wxDateTime wxDateTime::ToTimezone(const wxDateTime::TimeZone& tz, + bool noDST) const { - return Add(diff.Negate()); + MODIFY_AND_RETURN( MakeTimezone(tz, noDST) ); } -wxDateTime& wxDateTime::operator-=(const wxDateSpan& diff) +// ---------------------------------------------------------------------------- +// wxTimeSpan construction +// ---------------------------------------------------------------------------- + +inline wxTimeSpan::wxTimeSpan(long hours, + long minutes, + long seconds, + long milliseconds) { - return Add(diff.Negate()); + // 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; } -wxTimeSpan wxDateTime::operator-(const wxDateTime& datetime) const +// ---------------------------------------------------------------------------- +// wxTimeSpan accessors +// ---------------------------------------------------------------------------- + +inline wxLongLong wxTimeSpan::GetSeconds() const { - return Substract(datetime); + return m_diff / 1000l; +} + +inline int wxTimeSpan::GetMinutes() const +{ + return (GetSeconds() / 60l).GetLo(); +} + +inline int wxTimeSpan::GetHours() const +{ + return GetMinutes() / 60; +} + +inline int wxTimeSpan::GetDays() const +{ + return GetHours() / 24; +} + +inline int wxTimeSpan::GetWeeks() const +{ + return GetDays() / 7; } // ---------------------------------------------------------------------------- -// wxTimeSpan +// wxTimeSpan arithmetics // ---------------------------------------------------------------------------- -wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff) +inline wxTimeSpan wxTimeSpan::Add(const wxTimeSpan& diff) const +{ + return wxTimeSpan(m_diff + diff.GetValue()); +} + +inline wxTimeSpan& wxTimeSpan::Add(const wxTimeSpan& diff) { m_diff += diff.GetValue(); return *this; } -wxTimeSpan& wxTimeSpan::Substract(const wxTimeSpan& diff) +inline wxTimeSpan wxTimeSpan::Subtract(const wxTimeSpan& diff) const +{ + return wxTimeSpan(m_diff - diff.GetValue()); +} + +inline wxTimeSpan& wxTimeSpan::Subtract(const wxTimeSpan& diff) { m_diff -= diff.GetValue(); return *this; } -wxTimeSpan& wxTimeSpan::Multiply(int n) +inline wxTimeSpan& wxTimeSpan::Multiply(int n) { - m_diff *= n; + m_diff *= (long)n; return *this; } -wxTimeSpan wxTimeSpan::operator*(int n) const +inline wxTimeSpan wxTimeSpan::Multiply(int n) const { - wxTimeSpan result(*this); - result.Multiply(n); - - return result; + return wxTimeSpan(m_diff * (long)n); } -wxTimeSpan wxTimeSpan::Abs() const +inline wxTimeSpan wxTimeSpan::Abs() const { return wxTimeSpan(GetValue().Abs()); } -bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const +inline bool wxTimeSpan::IsEqualTo(const wxTimeSpan& ts) const { return GetValue() == ts.GetValue(); } -bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const +inline bool wxTimeSpan::IsLongerThan(const wxTimeSpan& ts) const { - return Abs() > ts.Abs(); + return GetValue().Abs() > ts.GetValue().Abs(); } // ---------------------------------------------------------------------------- // wxDateSpan // ---------------------------------------------------------------------------- -wxDateSpan& -wxDateSpan::operator+=(const wxDateSpan& other) +inline wxDateSpan& wxDateSpan::operator+=(const wxDateSpan& other) { m_years += other.m_years; m_months += other.m_months; @@ -1120,22 +1821,41 @@ wxDateSpan::operator+=(const wxDateSpan& other) return *this; } -wxDateSpan& wxDateSpan::operator*=(int factor) +inline wxDateSpan& wxDateSpan::Add(const wxDateSpan& other) +{ + return *this += other; +} + +inline wxDateSpan wxDateSpan::Add(const wxDateSpan& other) const +{ + wxDateSpan ds(*this); + ds.Add(other); + return ds; +} + +inline wxDateSpan& wxDateSpan::Multiply(int factor) { - m_years *= m_years; - m_months *= m_months; - m_weeks *= m_weeks; - m_days *= m_days; + m_years *= factor; + m_months *= factor; + m_weeks *= factor; + m_days *= factor; return *this; } -wxDateSpan Negate() const +inline wxDateSpan wxDateSpan::Multiply(int factor) const +{ + wxDateSpan ds(*this); + ds.Multiply(factor); + return ds; +} + +inline wxDateSpan wxDateSpan::Negate() const { return wxDateSpan(-m_years, -m_months, -m_weeks, -m_days); } -wxDateSpan& Neg() +inline wxDateSpan& wxDateSpan::Neg() { m_years = -m_years; m_months = -m_months; @@ -1145,4 +1865,272 @@ wxDateSpan& Neg() return *this; } -#endif // _WX_TIME_H +inline wxDateSpan& wxDateSpan::operator-=(const wxDateSpan& other) +{ + return *this += other.Negate(); +} + +inline wxDateSpan& wxDateSpan::Subtract(const wxDateSpan& other) +{ + return *this -= other; +} + +inline wxDateSpan wxDateSpan::Subtract(const wxDateSpan& other) const +{ + wxDateSpan ds(*this); + ds.Subtract(other); + return ds; +} + +#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 dt.Add(ts); +} + +inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt, + const wxTimeSpan& ts) +{ + return dt.Subtract(ts); +} + +inline wxDateTime WXDLLIMPEXP_BASE operator+(const wxDateTime& dt, + const wxDateSpan& ds) +{ + return dt.Add(ds); +} + +inline wxDateTime WXDLLIMPEXP_BASE operator-(const wxDateTime& dt, + const wxDateSpan& ds) +{ + 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 operators +// ---------------------------------------------------------------------------- + +// arithmetics +// ----------- + +inline wxTimeSpan WXDLLIMPEXP_BASE operator+(const wxTimeSpan& ts1, + const wxTimeSpan& ts2) +{ + return wxTimeSpan(ts1.GetValue() + ts2.GetValue()); +} + +inline wxTimeSpan WXDLLIMPEXP_BASE operator-(const wxTimeSpan& ts1, + const wxTimeSpan& ts2) +{ + return wxTimeSpan(ts1.GetValue() - ts2.GetValue()); +} + +inline wxTimeSpan WXDLLIMPEXP_BASE operator*(const wxTimeSpan& ts, int n) +{ + return wxTimeSpan(ts).Multiply(n); +} + +inline wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts) +{ + return wxTimeSpan(ts).Multiply(n); +} + +// comparison +// ---------- + +inline bool WXDLLIMPEXP_BASE operator<(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() < t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator<=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() <= t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator>(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() > t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator>=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() >= t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator==(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() == t2.GetValue(); +} + +inline bool WXDLLIMPEXP_BASE operator!=(const wxTimeSpan &t1, const wxTimeSpan &t2) +{ + return t1.GetValue() != t2.GetValue(); +} + +// ---------------------------------------------------------------------------- +// wxDateSpan +// ---------------------------------------------------------------------------- + +// 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) +{ + return ds1.GetYears() == ds2.GetYears() && + ds1.GetMonths() == ds2.GetMonths() && + ds1.GetTotalDays() == ds2.GetTotalDays(); +} + +inline WXDLLIMPEXP_BASE bool operator!=(const wxDateSpan& ds1, + const wxDateSpan& ds2) +{ + return !(ds1 == ds2); +} + +// arithmetics +// ----------- + +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()); +} + +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()); +} + +inline WXDLLIMPEXP_BASE wxDateSpan operator*(const wxDateSpan& ds, int n) +{ + return wxDateSpan(ds).Multiply(n); +} + +inline WXDLLIMPEXP_BASE wxDateSpan operator*(int n, const wxDateSpan& ds) +{ + return wxDateSpan(ds).Multiply(n); +} + +// ============================================================================ +// 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); +} + +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