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TABLE OF CONTENTS Date/--background-- Date/Compare2Dates Date/Compare2Times Date/DateText Date/DateToJD Date/DateToNum Date/DayDiff Date/DaysAfterWeekday Date/DaysBeforeWeekday Date/DiffDateRange Date/DiffTime Date/Easter Date/FormatDate Date/FormatTime Date/GMTToLocal Date/GregorianDayDiff Date/GregorianDaysAfterWeekday Date/GregorianDaysBeforeWeekday Date/GregorianDiffDate Date/GregorianDiffDateRange Date/GregorianEaster Date/GregorianLastMonthDay Date/GregorianLeapYear Date/GregorianMonthDays Date/GregorianMoonAge Date/GregorianMoonPhase Date/GregorianRangeDiff Date/GregorianToJD Date/GregorianWeek Date/GregorianWeekday Date/GregorianWWtoDM Date/GregorianYearDays Date/GSYearToJD Date/GYearToScaliger Date/HeisDayDiff Date/HeisDaysAfterWeekday Date/HeisDaysBeforeWeekday Date/HeisDiffDate Date/HeisDiffDateRange Date/HeisEaster Date/HeisLastMonthDay Date/HeisLeapYear Date/HeisMonthDays Date/HeisRangeDiff Date/HeisToJD Date/HeisWeek Date/HeisWeekday Date/HeisWWtoDM Date/HeisYearDays Date/HSYearToJD Date/HYearToScaliger Date/JDToDate Date/JDToGregorian Date/JDToHeis Date/JDToJulian Date/JDtoMJD Date/JDToTime Date/JSYearToJD Date/JulianDayDiff Date/JulianDaysAfterWeekday Date/JulianDaysBeforeWeekday Date/JulianDiffDate Date/JulianDiffDateRange Date/JulianEaster Date/JulianLastMonthDay Date/JulianLeapYear Date/JulianMonthDays Date/JulianRangeDiff Date/JulianToJD Date/JulianWeek Date/JulianWeekday Date/JulianWWtoDM Date/JulianYearDays Date/JYearToScaliger Date/LastMonthDay Date/LeapYear Date/LMT Date/LocalToGMT Date/MJDtoJD Date/MonthDays Date/MonthShortText Date/MonthText Date/NextValidDate Date/NextValidGregorianDate Date/NextValidHeisDate Date/NextValidJulianDate Date/NumToDate Date/NumToTime Date/ParseDate Date/ParseTime Date/PreviousValidDate Date/PreviousValidGregorianDate Date/PreviousValidHeisDate Date/PreviousValidJulianDate Date/RangeDiff Date/ScaligerYearToG Date/ScaligerYearToH Date/ScaligerYearToJ Date/ScaligerYearToYear Date/SecToTime Date/SetCountry Date/SetFirstWeekday Date/SupplementCentury Date/SYearToJD Date/TimeDiff Date/TimeToJD Date/TimeToNum Date/TimeToSec Date/TimeZoneFactor Date/ValidDate Date/ValidGregorianDate Date/ValidHeisDate Date/ValidJulianDate Date/ValidTime Date/Week Date/Weekday Date/WeekdayShortText Date/WeekdayText Date/WWtoDM Date/YearDays Date/YearToScaliger Date/--background-- Date/--background-- NAME Date -- This module was designed in helping calc.calendar dates (V33) FUNCTION This module has been designed to become a useful and portable library and to help developers calculate calendar dates! NOTES A tropical year is 365.2422 days! / 365d, 5h, 48min, 46sec A moon month is 29.53059 days! / 29d, 12h, 44min, 2.9 sec A moon phase is 7.38265 days! The calculations are historical and NOT astronomical! Date/Compare2Dates Date/Compare2Dates NAME Compare2Dates -- Compares date1 with date2. (V33.100) SYNOPSIS compare = date_Compare2Dates(day1,month1,year1,day2,month2,year2); d0 d0 d1 d2 d3 d4 d5 short date_Compare2Dates(const unsigned short day1, const unsigned short month1, const long year1, const unsigned short day2, const unsigned short month2, const long year2); FUNCTION Compare2Dates compares date1 with date2. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT compare - -1 : date1 < date2 0 : date1 = date2 1 : date1 > date2 EXAMPLE ... if (date_Compare2Dates(18,9,1970,22,1,1994) == -1) { printf("<\n"); } else { printf(">=\n"); } ... NOTES It is better only to use this function for years from 8 to 8000! There is no need for different versions for Julian, Gregorian and Heis dates! BUGS There is no check if the dates are valid! SEE ALSO Compare2Times() Date/Compare2Times Date/Compare2Times NAME Compare2Times -- Compares time1 with time2. (V33.100) SYNOPSIS compare = time_Compare2Times(hour1,min1,sec1,hour2,min2,sec2); d0 d0 d1 d2 d3 d4 d5 short time_Compare2Times(const unsigned short hour1, const unsigned short min1, const unsigned short sec1, const unsigned short hour2, const unsigned short min2, const unsigned short sec2); FUNCTION Compare2Times compares time1 with time2 (24h format only). INPUTS hour1 - Hour of the first time. min1 - Minute of the first time. sec1 - Second of the first time. hour2 - Hour of the second time. min2 - Minute of the second time. sec2 - Second of the second time. RESULT compare - -1 : time1 < time2 0 : time1 = time2 1 : time1 > time2 EXAMPLE ... if (time_Compare2Times(13,10,0,9,0,0) == -1) printf("<\n"); else printf(">=\n"); ... NOTES This compares two times of 24h format! BUGS There is no check if the times are valid times! SEE ALSO Compare2Dates() Date/DateText Date/DateText NAME DateText -- Get a date text string. (V33.130) SYNOPSIS date_DateText(dt,text,lang,wc); d0 a0 d1 d2 void date_DateText(const date_DateTexts dt, char *const text, const date_Languages lang, const date_WordClass wc); FUNCTION This function gets a date specified text in each supported language INPUTS dt - The text you want. text - Pointer to a string to fill in the text. lang - Language for which you want the text. wc - singular : The singular form is given. plural : The plural form is given (if available). periodical : The periodical form is given (if available). RESULT None EXAMPLE ... char txt[20]; ... date_DateText(day,&txt,English,date_SINGULAR); ... NOTES Languages: Locale : This is an Amiga >= OS2.1 only feature, for <= OS2.0 and other systems it will return English text! Available strings: day,month,year,week,weekday,hour,minute,second,yesterday,today, tomorrow There is no plural form available for: yesterday,today,tomorrow There is no periodical form available for: yesterday,today,tomorrow, weekday BUGS In this version there is no check, if there is enough space in text! SEE ALSO WeekdayText(),WeekdayShortText(),MonthText(),MonthShortText() Date/DateToJD Date/DateToJD NAME DateToJD -- Returns the JD for a date. (V33.310) SYNOPSIS jd = date_DateToJD(day,month,year,calendar); d0 d0 d1 d2 d3 unsigned long date_DateToJD(const unsigned short day, const unsigned short month, const long year, const date_Calendars calendar); FUNCTION Returns the JD for a date. INPUTS day - day of the date to convert month - month of the date to convert year - year of the date to convert calendar - Calendar system to use RESULT jd - This is the JD EXAMPLE ... jd = date_DateToJD(23,1,1994,date_Gregorian); ... NOTES It is better to use this function only from 8 to 8000! BUGS unknown. SEE ALSO JulianToJD(),GregorianToJD(),HeisToJD() Date/DateToNum Date/DateToNum NAME DateToNum -- Returns the date in a numeric format. (V33.250) SYNOPSIS num = date_DateToNum(day,month,year); d0 d0 d1 d2 long date_DateToNum(const unsigned short day, const unsigned short month, const long year); FUNCTION Returns the date in a numeric format: (year*100+month)*100+day INPUTS day - day of the date to convert month - month of the date to convert year - year of the date to convert RESULT num - Date in numeric format. EXAMPLE ... num = date_DateToNum(28,6,1997); ... NOTES Negative years will be handled correctly. BUGS None. SEE ALSO NumToDate() Date/DayDiff Date/DayDiff NAME DayDiff -- Calculates the days between 2 dates. (V33.310) SYNOPSIS days = date_DayDiff(day1,month1,year1,day2,month2,year2,calendar); d0 d0 d1 d2 d3 d4 d5 d6 long date_DayDiff(const unsigned short day1, unsigned short month1, long year1, const unsigned short day2, unsigned short month2, long year2, const date_Calendars calendar); FUNCTION DayDiff gives you back the number of days between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date calendar - Calendar system to use RESULT days - The number of days between the two dates (positive if date1 <= date2). EXAMPLE long days; ... days = date_DayDiff(18,9,1970,22,1,1994,date_Gregorian); printf("Age of Kai Hofmann in days : %ld\n",days); ... NOTES It is better only to use this function for years from 8 to 02.3200! BUGS If you use one of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist! SEE ALSO JulianDayDiff(),GregorianDayDiff(),HeisDayDiff() Date/DaysAfterWeekday Date/DaysAfterWeekday NAME DaysAfterWeekday -- Returns the diff to wday after. (V33.310) SYNOPSIS days = date_DaysAfterWeekday(day,month,year,weekday,calendar); d0 d0 d1 d2 d3 d4 unsigned short date_DaysAfterWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday, const date_Calendars calendar); FUNCTION Returns the days to the weekday after the specified date. INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference calendar - Calendar system to use RESULT days - The days after to the searched weekday. EXAMPLE ... days = date_DaysAfterWeekday(22,1,1994,date_Thursday,date_Gregorian); ... NOTES It is better to use this function only from 8 to 3200! BUGS See Weekday()! SEE ALSO JulianDaysAfterWeekday(),GregorianDaysAfterWeekday(), HeisDaysAfterWeekday() Date/DaysBeforeWeekday Date/DaysBeforeWeekday NAME DaysBeforeWeekday -- Returns the diff to wday before. (V33.310) SYNOPSIS days = date_DaysBeforeWeekday(day,month,year,weekday,calendar); d0 d0 d1 d2 d3 d4 unsigned short date_DaysBeforeWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday, const date_Calendars calendar); FUNCTION Returns the days to the weekday before the specified date. INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference calendar - Calendar system to use RESULT days - The days gets you back to the searched weekday (1-7) If you get back an 8, an error occurs! EXAMPLE ... days = date_DaysBeforeWeekday(22,1,1994,date_Thursday,date_Gregorian); ... NOTES It is better to use this function only from 8 to 3200! BUGS See Weekday()! SEE ALSO JulianDaysBeforeWeekday(),GregorianDaysBeforeWeekday(), HeisDaysBeforeWeekday() Date/DiffDateRange Date/DiffDateRange NAME DiffDateRange -- Calc new date from old one. (V33.310) SYNOPSIS date_DiffDateRange(day,month,year,days,months, years,dday,dmonth,dyear,calendar); d0 d1 d2 d3 d4 d5 a0 a1 a2 d6 void date_DiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short *const dday, unsigned short *const dmonth, long *const dyear, const date_Calendars calendar); void date_DiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short &dday, unsigned short &dmonth, long &dyear, const date_Calendars calendar); FUNCTION Returns the date which lies diffrange before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days months - difference to the date in months years - difference to the date in years calendar - Calendar system to use RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_DiffDateRange(23,1,1994,0,0,1,&dday,&dmonth,&dyear,date_Gregorian); ... NOTES It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO RangeDiff(),JulianDiffDateRange(),GregorianDiffDateRange(), HeisDiffDateRange() Date/DiffTime Date/DiffTime NAME DiffTime -- Returns the diff. time to another time. (V33) SYNOPSIS time_DiffTime(hour,min,sec,secs,rhour,rmin,rsec); d0 d1 d2 d3 a0 a1 a2 void time_DiffTime(const unsigned short hour, const unsigned short min, const unsigned short sec, long secs, unsigned short *const rhour, unsigned short *const rmin, unsigned short *const rsec); void time_DiffTime(const unsigned short hour, const unsigned short min, const unsigned short sec, long secs, unsigned short &rhour, unsigned short &rmin, unsigned short &rsec); FUNCTION Returns the time which lies diffsecs before/after the specified time. INPUTS hour - hour min - minute sec - second diffsecs - difference to the time in seconds RESULT rhour - new hour rmin - new minute rsec - new second EXAMPLE ... time_DiffTime(12,19,0,2460,&hour,&min,&sec); ... NOTES Don't forget to convert AM/PM to 24h time! Don't forget to convert 24h time to AM/PM time if needed! BUGS No errorcheck, if you use a valid time SEE ALSO TimeToSec(),SecToTime() Date/Easter Date/Easter NAME Easter -- Returns the date of Easter in a year (V33.310) SYNOPSIS date_Easter(year,dday,dmonth,calendar); d0 a0 a1 d1 void date_Easter(const long year, unsigned short *const dday, unsigned short *const dmonth, const date_Calendars calendar); void date_Easter(const long year, unsigned short &dday, unsigned short &dmonth, const date_Calendars calendar); FUNCTION Returns the date of Easter for a specified year. INPUTS year - Easter is calculated for this year calendar - Calendar system to use RESULT dday - day of Easter Sunday dmonth - month of Easter Sunday EXAMPLE ... date_Easter(1994,&dday,&dmonth,date_Gregorian); ... NOTES Use this only for 31 to 2099! BUGS None. SEE ALSO JulianEaster(),GregorianEaster(),HeisEaster() Date/FormatDate Date/FormatDate NAME FormatDate -- Formats a date string (V33.238) SYNOPSIS date_FormatDate(fmt,day,month,year,lang,tstr); a0 d0 d1 d2 d3 a1 void date_FormatDate(const char *const fmt, const unsigned short day, const unsigned short month, const long year, const date_Languages lang, char *const tstr); FUNCTION Formats the date into a string. INPUTS fmt - Format template string day - Day of the date to format month - Month of the date to format year - Year of the date to format lang - Language to use for strings RESULT tstr - Formatted date string EXAMPLE char buffer[20]; ... date_FormatDate("%Y-%m-%d",10,3,1997,date_Locale,buffer); /* "1997-03-10" */ ... SYNTAX Syntax of Amiga compatible % commands: %d : Day number with leading 0s %e : Day number with leading spaces %m : Month number with leading 0s %h : Abbreviated month name %b : Abbreviated month name %B : Month name %y : Year using two digits with leading 0s %Y : Year using four digits with leading 0s %j : Julian date %w : Weekday number %a : Abbreviated weekday name %A : Weekday name %U : Week number, taking Sunday as first day of week %W : Week number, taking Monday as first day of week %x : Same as "%m/%d/%y" %D : Same as "%m/%d/%y" Syntax of % commands: %Ddf : Day with leading 0s %Ddv : Day without leading 0s %DDf : Day within the year with leading 0s %DDv : Day within the year without leading 0s %Dmf : Month with leading 0s %Dmv : Month without leading 0s %Dms : Month string %Dma : Abbreviated month string %Dy2f : 2-digit year with leading 0s %Dy2v : 2-digit year without leading 0s %Dy4f : 4-digit year with leading 0s %Dy4v : 4-digit year without leading 0s %Dys : Scaliger year %Dj : JD date %DJ : MJD date %Dwn : Weekday number (1-7) %Dws : Weekday string %Dwa : Abbreviated weekday string %DWf : Weeknumber with leading 0s %DWv : Weeknumber without leading 0s %DMf : Age of the moon (0-30 ?) with leading 0s %DMv : Age of the moon (0-30 ?) without leading 0s NOTES None. BUGS No errorcheck, if you use a valid date, no check if tstr is big enough. Using something like "%a %W %Y" as fmt might result in a wrong output year if used for the first/last week of a year. Example: 1996-12-30 results into "Mo 1 1996" instead of 1997! SEE ALSO ParseDate() Date/FormatTime Date/FormatTime NAME FormatTime -- Formats a time string (V33.224) SYNOPSIS time_FormatTime(fmt,ChangeDay,ChangeHour,DST,hour,min,sec, zonemin,tstr); a0 d0 d1 d2 d3 d4 d5 d6 a1 void time_FormatTime(const char *const fmt, const enum time_ChangeDay ChangeDay, const unsigned short ChangeHour, const bool DST, const unsigned short hour, const unsigned short min, const unsigned short sec, const short zonemin, char *const tstr); FUNCTION Formats the time into a string. INPUTS fmt - Format template string ChangeDay - Normal day, winter to summer or summer to winter time change day. ChangeHour - Hour of summer/winter time change DST - Daylight saving status hour - Hour of the time to format min - Minute of the time to format sec - Second of the time to format zonemin - Time that was added to GMT time to get the local time zone (in minutes -779 to +779) RESULT tstr - Formatted time string EXAMPLE char buffer[20]; ... time_FormatTime("%H:%M:%S",time_Normal,2,0,14,57,0,-360, buffer); /* "14:57:0" */ ... SYNTAX Syntax of Amiga compatible % commands: %q : Hour using 24-hour style %H : Hour using 24-hour style with leading 0s %Q : Hour using 12-hour style %I : Hour using 12-hour style with leading 0s %p : AM or PM strings %M : The number of minutes with leading 0s %S : Number of seconds with leadings 0s %R : Same as "%H:%M" %X : Same as "%H:%M:%S" %T : Same as "%H:%M:%S" %r : Same as "%I:%M:%S %p" Syntax of % commands: %Th1f : 12 with leading 0s %Th1v : 12 without leading 0s %Th2f : 24 with leading 0s %Th2v : 24 without leading 0s %Tpso : a/p %Tpsu : A/P %Tplo : am/pm %Tplu : AM/PM %Tmf : with leading 0s %Tmv : without leading 0s %Tsf : with leading 0s %Tsv : without leading 0s %Tj. : starting with '.' %Tj, : starting with ',' %Tj0 : starting with '0.' %Tj1 : starting with '0,' %Tzh?? : hours only %Tzm? : 0100 %TzM?? : 01:00 %Tz?z? : Use Z for UTC %Tz?0? : Use +00 for UTC %Tz??f : use leading 0s %Tz??v : do not use leading 0s %Tc1 : Use DST for s->w switch %Tc2 : Use I/II for s->w switch %Tc3 : Use a/b for s->w switch (24h only) - on 12h falls back to 2 NOTES None. BUGS No errorcheck, if you use a valid time, no check if tstr is big enough. SEE ALSO ParseTime() Date/GMTToLocal Date/GMTToLocal NAME GMTToLocal -- Converts a GMT time to a locale one (V33.300) SYNOPSIS datetime_GMTToLocal(gjd,gsecs,zonemin,ChangePrevDay,ChangeDay, ChangeNextDay,ChangeHour,ljd,lsecs,DST); d0 d1 d2 d3 d4 d5 d6 a0 a1 a2 void datetime_GMTToLocal(const unsigned long gjd, const unsigned long gsecs, const short zonemin, const time_ChangeDay ChangePrevDay, const time_ChangeDay ChangeDay, const time_ChangeDay ChangeNextDay, const unsigned short ChangeHour, unsigned long *const ljd, unsigned long *const lsecs, bool *const DST); void datetime_GMTToLocal(const unsigned long gjd, const unsigned long gsecs, const short zonemin, const time_ChangeDay ChangePrevDay, const time_ChangeDay ChangeDay, const time_ChangeDay ChangeNextDay, const unsigned short ChangeHour, unsigned long &ljd, unsigned long &lsecs, bool &DST); FUNCTION Converts a GMT date/time pair into a local date/time pair. The conversion considers the local daylight savings time as well as the time change from winter to summer and vice versa (if any). INPUTS gjd - GMT Julian Date gsecs - GMT time in seconds zonemin - Time that was added to GMT time to get the local time zone (in minutes -779 to +779) ChangePrevDay - Normal day, winter to summer or summer to winter time change on the previous day ChangeDay - Normal day, winter to summer or summer to winter time change day ChangeNextDay - Normal day, winter to summer or summer to winter time change on the next day ChangeHour - Hour of summer/winter time change DST - Daylight saving status RESULT DST - Daylight saving status ljd - Local Julian Date lsecs - Local time in seconds EXAMPLE unsigned long ljd,lsecs; bool DST = true; ... datetime_GMTToLocal(2450919,30300,+60,time_Normal,time_Normal, time_Normal,2,&ljd,&lsecs,&DST); ... NOTES None. BUGS No errorcheck, if you use a valid date/time. SEE ALSO LocalToGMT(), JulianToJD(), GregorianToJD(), HeisToJD(), JDToJulian(), JDToGregorian(), JDToHeis(), TimeToSec(), SecToTime(), TimeZoneFactor() Date/GregorianDayDiff Date/GregorianDayDiff NAME GregorianDayDiff -- Calculates the days between 2 dates. (V33) SYNOPSIS days = date_GregorianDayDiff(day1,month1,year1,day2,month2,year2); d0 d0 d1 d2 d3 d4 d5 long date_GregorianDayDiff(const unsigned short day1, unsigned short month1, long year1, const unsigned short day2, unsigned short month2, long year2); FUNCTION GregorianDayDiff gives you back the number of days between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). EXAMPLE long days; ... days = date_GregorianDayDiff(18,9,1970,22,1,1994); printf("Age of Kai Hofmann in days : %ld\n",days); ... NOTES It is better only to use this function for years from 8 to 02.3200! BUGS If you use one of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist! SEE ALSO GregorianLeapYear(),GregorianMonthDays(),GregorianYearDays(), JulianDayDiff(),HeisDayDiff() Date/GregorianDaysAfterWeekday Date/GregorianDaysAfterWeekday NAME GregorianDaysAfterWeekday -- Returns the diff to wday after. (V33) SYNOPSIS days = date_GregorianDaysAfterWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_GregorianDaysAfterWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday after the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 5! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days after to the searched weekday. EXAMPLE ... days = date_GregorianDaysAfterWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 3200! BUGS See GregorianWeekday()! SEE ALSO GregorianWeekday(),JulianDaysAfterWeekday(),HeisDaysAfterWeekday() Date/GregorianDaysBeforeWeekday Date/GregorianDaysBeforeWeekday NAME GregorianDaysBeforeWeekday -- Returns the diff to wday before. (V33) SYNOPSIS days = date_GregorianDaysBeforeWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_GregorianDaysBeforeWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday before the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 2! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days gets you back to the searched weekday (1-7) If you get back an 8 an error occurs! EXAMPLE ... days = date_GregorianDaysBeforeWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 3200! BUGS See GregorianWeekday()! SEE ALSO GregorianWeekday(),JulianDaysBeforeWeekday(),HeisDaysBeforeWeekday() Date/GregorianDiffDate Date/GregorianDiffDate NAME GregorianDiffDate -- Returns the diff date to another date. (V33) SYNOPSIS date_GregorianDiffDate(day,month,year,days,dday,dmonth,dyear); d0 d1 d2 d3 a0 a1 a2 void date_GregorianDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_GregorianDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies days before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_GregorianDiffDate(23,1,1994,7,&dday,&dmonth,&dyear); ... NOTES This function is OBSOLETE - please use GregorianDiffDateRange() instead! It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO GregorianDayDiff(),GregorianMonthDays(),JulianDiffDate(), HeisDiffDate() Date/GregorianDiffDateRange Date/GregorianDiffDateRange NAME GregorianDiffDateRange -- Calc new date from old one. (V33.296) SYNOPSIS date_GregorianDiffDateRange(day,month,year,days,months, years,dday,dmonth,dyear); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_GregorianDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_GregorianDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies diffrange before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days months - difference to the date in months years - difference to the date in years RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_GregorianDiffDateRange(23,1,1994,0,0,1,&dday,&dmonth,&dyear); ... NOTES It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO GregorianDiffDate(),GregorianRangeDiff(),JulianDiffDateRange(), HeisDiffDateRange() Date/GregorianEaster Date/GregorianEaster NAME GregorianEaster -- Returns the date of Easter in a year (V33) SYNOPSIS date_GregorianEaster(year,dday,dmonth); d0 a0 a1 void date_GregorianEaster(const long year, unsigned short *const dday, unsigned short *const dmonth); void date_GregorianEaster(const long year, unsigned short &dday, unsigned short &dmonth); FUNCTION Returns the date of Easter for a specified year. INPUTS year - Easter is calculated for this year RESULT dday - day of Easter Sunday dmonth - month of Easter Sunday EXAMPLE ... date_GregorianEaster(1994,&dday,&dmonth); ... NOTES Use this only for 31 to 2099! BUGS None. SEE ALSO JulianEaster(),HeisEaster() Date/GregorianLastMonthDay Date/GregorianLastMonthDay NAME GregorianLastMonthDay -- The number of last day in a month. (V33.234) SYNOPSIS day = date_GregorianLastMonthDay(month,year); d0 d0 d1 unsigned short date_GregorianLastMonthDay(const unsigned short month, const long year); FUNCTION GregorianLastMonthDay returns the number of the last day for a given month. INPUTS month - The month from which you want to get the last day. year - The year in which the month is. RESULT days - The number of the last day the month uses, or 0 if you use an incorrect month. EXAMPLE ... day = date_GregorianLastMonthDay(1,1994); /* 31 */ ... NOTES Use this function only for years from 8 to 3199! BUGS none. SEE ALSO GregorianMonthDays(),JulianLastMonthDay(),HeisLastMonthDay() Date/GregorianLeapYear Date/GregorianLeapYear NAME GregorianLeapYear -- Checks if a year is a leap year. (V33) SYNOPSIS leapyear = date_GregorianLeapYear(year); d0 d0 bool date_GregorianLeapYear(const long year); FUNCTION GregorianLeapYear checks if a year is a leap year. For years after 1582 all years devideable by 4 are leap years, without years devideable by 100, but years devideable by 400 are leap years again! For years before 1582 see JulianLeapYear(). INPUTS year - The year which should be checked (from -32768 to 32767) I think only values from 8 to 3200 are valid, because of the variant that was done by Augustus! RESULT leapyear - true if the year is a leap year, otherwise false. EXAMPLE ... if (date_GregorianLeapYear(1994)) { printf("leap year!\n"); } else { printf("no leap year!\n"); } ... NOTES A year is 365.2425 days long! Use this function only for values from 8 to 3199! BUGS No known bugs. SEE ALSO JulianLeapYear(),HeisLeapYear() Date/GregorianMonthDays Date/GregorianMonthDays NAME GregorianMonthDays -- Returns the number of days of a month. (V33) SYNOPSIS days = date_GregorianMonthDays(month,year); d0 d0 d1 unsigned short date_GregorianMonthDays(const unsigned short month, const long year); FUNCTION GregorianMonthDays returns the number of days a month in a specified year has. For the year 1582 and the month 10 there are only 21 days, because of the Gregorian-reform 10 days are deleted from the month (for more - look out for books about this!) INPUTS month - The month from which you want to get the number of days. year - The year in which the month is. RESULT days - The number of days the month uses, or 0 if you use an incorrect month. EXAMPLE unsigned short days; ... days = date_GregorianMonthDays(1,1994); printf("Days of January 1994 : %hu\n",days); ... NOTES Use this function only for years from 8 to 3199! BUGS none. SEE ALSO GregorianLeapYear(),JulianMonthDays(),HeisMonthDays() Date/GregorianMoonAge Date/GregorianMoonAge NAME GregorianMoonAge -- Returns the age of the moon (V33) SYNOPSIS ep = date_GregorianMoonAge(day,month,year); d0 d0 d1 d2 unsigned short date_GregorianMoonAge(const unsigned short day, const unsigned short month, const long year); FUNCTION Returns the age of the moon on a specified date. INPUTS day - For this day the age is calculated. month - For this month the age is calculated. year - For this year the age is calculated. RESULT ep - The age of the moon on the specified date. EXAMPLE ... ep = date_GregorianMoonAge(18,9,1994); ... NOTES Use this only for 1582 to 4100! This is only an experimental version! BUGS unknown. SEE ALSO MoonMonthAge(),GregorianEP(),GregorianMoonPhase() Date/GregorianMoonPhase Date/GregorianMoonPhase NAME GregorianMoonPhase -- Searches for the next moon phase (V33.098) SYNOPSIS jd = date_GregorianMoonPhase(day,month,year,phase); d0 d0 d1 d2 d3 unsigned long date_GregorianMoonPhase(const unsigned short day, const unsigned short month, const long year, const MoonPhases phase); FUNCTION Returns the next moon phase you are searching for after a specified date. INPUTS day - Start day for the search. month - Start month for the search. year - Start year for the search. phase - The moon phase you want to know. RESULT jd - The day (as JD) on which the moon phase was found. EXAMPLE ... jd = date_GregorianMoonPhase(18,9,1994,FullMoon); date_JDToGregorian(jd,&day,&month,&year); ... NOTES The range of this function is unknown to me! So use it only from 1583 to 2500. This is only an experimental version! BUGS unknown. SEE ALSO MoonMonthAge() Date/GregorianRangeDiff Date/GregorianRangeDiff NAME GregorianRangeDiff -- Calculates the range between 2 dates. (V33.297) SYNOPSIS date_GregorianRangeDiff(day1,month1,year1,day2,month2,year2,days, months,years); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_GregorianRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short *const days, short *const months, long *const years); void date_GregorianRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short &days, short &months, long &years); FUNCTION GregorianRangeDiff gives you back the number of days, months and years between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). months - The number of months between the two dates (positive if date1 <= date2). years - The number of years between the two dates (positive if date1 <= date2). EXAMPLE short days,months; long years; ... date_GregorianRangeDiff(18,9,1970,25,1,1998,&days,&months,&years); printf("Age of Kai Hofmann is : %ld years, %hd months, %hd days\n", years,months,days); ... NOTES It is better only to use this function for years from 8 to 02.3200! BUGS If you use one of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist! SEE ALSO GregorianDayDiff(),GregorianDiffDateRange(),JulianRangeDiff(), HeisRangeDiff() Date/GregorianToJD Date/GregorianToJD NAME GregorianToJD -- Returns the JD for a date. (V33) SYNOPSIS jd = date_GregorianToJD(day,month,year); d0 d0 d1 d2 unsigned long date_GregorianToJD(const unsigned short day, const unsigned short month, const long year); FUNCTION Returns the JD for a Gregorian date. INPUTS day - day of the date to convert month - month of the date to convert year - year of the date to convert RESULT jd - This is the JD EXAMPLE ... jd = date_GregorianToJD(23,1,1994); ... NOTES It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO GSYearToJD(),GYearToScaliger(),GregorianDayDiff(),JulianToJD(), HeisToJD() Date/GregorianWeek Date/GregorianWeek NAME GregorianWeek -- Gets the weeknumber for a specified date. (V33) SYNOPSIS weeknr = date_GregorianWeek(day,month,year); d0 d0 d1 d2 unsigned short date_GregorianWeek(const unsigned short day, const unsigned short month, const long year); FUNCTION GregorianWeek gets the number of the week for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT week - This is the number of the week the specified date lies in. If the first day in a new year is a Friday, Saturday or Sunday, this would be the last week of the last year! If the 29.12. is a Monday, the 30.12. is a Monday or a Tuesday, the 31.12. is a Monday, Tuesday or a Wednesday this is the first week of the next year! EXAMPLE ... weeknr = date_GregorianWeek(4,10,1582); ... NOTES It is better only to use this function for years from 8 to 3200! BUGS For years < 0 errors could occur. SEE ALSO JulianWeek(),HeisWeek(),GregorianWeekday(),GregorianDayDiff(), SetFirstWeekday() Date/GregorianWeekday Date/GregorianWeekday NAME GregorianWeekday -- Gets the weekday of a specified date. (V33) SYNOPSIS weekday = date_GregorianWeekday(day,month,year); d0 d0 d1 d2 date_Weekdays date_GregorianWeekday(const unsigned short day, unsigned short month, long year); FUNCTION GregorianWeekday gets the weekday for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT weekday - This result is of type: date_Weekdays = {date_dayerr,date_Monday,date_Tuesday, date_Wednesday,date_Thursday,date_Friday, date_Saturday,date_Sunday}; dayerr will show you, that an error occurs! EXAMPLE ... weekday = date_GregorianWeekday(22,1,1994); if (weekday == dayerr) { ... } ... NOTES It is better only to use this function for years from 8 to 3200! In this version dayerr will only occur for the lost days :) BUGS It's not possible to use years < 0 (for more see JulianWeekday()). SEE ALSO JulianWeekday(),HeisWeekday() Date/GregorianWWtoDM Date/GregorianWWtoDM NAME GregorianWWtoDM -- Convert Weekday,Week to Day,Month. (V33.243) SYNOPSIS date_GregorianWWtoDM(weekday,week,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_GregorianWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_GregorianWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Converts weekday,week to day,month. INPUTS weekday - weekday of the date to convert week - week of the date to convert year - year of the date to convert RESULT day - day of the converted date month - month of the converted date year - year of the converted date EXAMPLE unsigned short day,month; long year; ... date_GregorianWWtoDM(date_Thursday,14,1997,&day,&month,&year); /* 1997-04-03 */ ... NOTES It is better to use this function only from 8 to 3200! Be careful, the resulting year might be different from the input year! BUGS unknown. SEE ALSO GregorianWWtoDM(), HeisWWtoDM() Date/GregorianYearDays Date/GregorianYearDays NAME GregorianYearDays -- Gives back the number of days in a year. (V33) SYNOPSIS days = date_GregorianYearDays(year); d0 d0 unsigned short date_GregorianYearDays(const long year); FUNCTION GregorianYearDays gives you back the number of days in a specified year. INPUTS year - The year in which to count the days. RESULT days - The number of days the year uses. EXAMPLE unsigned short days; ... days = date_GregorianYearDays(1994); printf("Days of 1994 : %hu\n",days); ... NOTES It is better only to use this function for years from 8 to 3199! BUGS No known bugs. SEE ALSO GregorianMonthDays(),JulianYearDays(),HeisYearDays() Date/GSYearToJD Date/GSYearToJD NAME GSYearToJD -- Calcs the JD from a Scaliger year. (V33) SYNOPSIS jd = date_GSYearToJD(syear); d0 d0 unsigned long date_GSYearToJD(const unsigned long syear); FUNCTION Returns the Julianday of a Scaliger year. INPUTS syear - Scaliger year RESULT jd - The Julianday EXAMPLE ... jd = date_GSYearToJD(4800); ... NOTES It is better to use this function only from 4707 to 7981! BUGS unknown. SEE ALSO JSYearToJD(),HSYearToJD() Date/GYearToScaliger Date/GYearToScaliger NAME GYearToScaliger -- Returns the year as Scaliger year. (V33) SYNOPSIS syear = date_GYearToScaliger(year); d0 d0 unsigned long date_GYearToScaliger(const long year); FUNCTION Returns the Scaliger year. INPUTS year - Gregorian year RESULT syear - The Scaliger year EXAMPLE ... syear = date_GYearToScaliger(1994); ... NOTES It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO JYearToScaliger(),HYearToScaliger() Date/HeisDayDiff Date/HeisDayDiff NAME HeisDayDiff -- Calculates the days between 2 dates. (V33) SYNOPSIS days = date_HeisDayDiff(day1,month1,year1,day2,month2,year2); d0 d0 d1 d2 d3 d4 d5 long date_HeisDayDiff(const unsigned short day1, unsigned short month1, long year1, const unsigned short day2, unsigned short month2, long year2); FUNCTION HeisDayDiff gives you back the number of days between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). EXAMPLE long days; ... days = date_HeisDayDiff(18,9,1970,22,1,1994); printf("Age of Kai Hofmann in days : %ld\n",days); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS If you use on of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist! SEE ALSO HeisLeapYear(),HeisMonthDays(),HeisYearDays(), JulianDayDiff(),GregorianDayDiff() Date/HeisDaysAfterWeekday Date/HeisDaysAfterWeekday NAME HeisDaysAfterWeekday -- Returns the diff to the wday after. (V33) SYNOPSIS days = date_HeisDaysAfterWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_HeisDaysAfterWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday after the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 5! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days after to the searched weekday. EXAMPLE ... days = date_HeisDaysAfterWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 8000! BUGS See HeisWeekday()! SEE ALSO HeisWeekday(),JulianDaysAfterWeekday(),GregorianDaysAfterWeekday() Date/HeisDaysBeforeWeekday Date/HeisDaysBeforeWeekday NAME HeisDaysBeforeWeekday -- Returns the diff to wday before. (V33) SYNOPSIS days = date_HeisDaysBeforeWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_HeisDaysBeforeWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday before the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 2! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days gets you back to the searched weekday (1-7) If you get back an 8 an error occurs! EXAMPLE ... days = date_HeisDaysBeforeWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 8000! BUGS See HeisWeekday()! SEE ALSO HeisWeekday(),JulianDaysBeforeWeekday(),GregorianDaysBeforeWeekday() Date/HeisDiffDate Date/HeisDiffDate NAME HeisDiffDate -- Returns the date for a diff to another date. (V33) SYNOPSIS date_HeisDiffDate(day,month,year,days,dday,dmonth,dyear); d0 d1 d2 d3 a0 a1 a2 void date_HeisDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_HeisDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies days before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_HeisDiffDate(23,1,1994,7,&dday,&dmonth,&dyear); ... NOTES This function is OBSOLETE - please use HeisDiffDateRange() instead! It is better to use this function only from 8 to 8000! BUGS unknown. SEE ALSO HeisDayDiff(),HeisMonthDays(),JulianDiffDate(),GregorianDiffDate() Date/HeisDiffDateRange Date/HeisDiffDateRange NAME HeisDiffDateRange -- Calc new date from old one and diff. (V33.296) SYNOPSIS date_HeisDiffDateRange(day,month,year,days,months,years, dday,dmonth,dyear); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_HeisDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_HeisDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies diffrange before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days months - difference to the date in months years - difference to the date in years RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_HeisDiffDateRange(23,1,1994,0,0,1,&dday,&dmonth,&dyear); ... NOTES It is better to use this function only from 8 to 8000! BUGS unknown. SEE ALSO HeisDiffDate(),HeisRangeDiff(),JulianDiffDateRange(), GregorianDiffDateRange() Date/HeisEaster Date/HeisEaster NAME HeisEaster -- Returns the date of Easter in a year (V33) SYNOPSIS date_HeisEaster(year,dday,dmonth); d0 a0 a1 void date_HeisEaster(const long year, unsigned short *const dday, unsigned short *const dmonth); void date_HeisEaster(const long year, unsigned short &dday, unsigned short &dmonth); FUNCTION Returns the date of Easter for a specified year. INPUTS year - Easter is calculated for this year RESULT dday - day of Easter Sunday dmonth - month of Easter Sunday EXAMPLE ... date_HeisEaster(1994,&dday,&dmonth); ... NOTES This is only a dummy to date_GregorianEaster! Use this only for 31 to 2099! BUGS Unknown. SEE ALSO JulianEaster(),GregorianEaster() Date/HeisLastMonthDay Date/HeisLastMonthDay NAME HeisLastMonthDay -- The number of last day in a month. (V33.234) SYNOPSIS day = date_HeisLastMonthDay(month,year); d0 d0 d1 unsigned short date_HeisLastMonthDay(const unsigned short month, const long year); FUNCTION HeisLastMonthDay returns the number of the last day for a given month. INPUTS month - The month from which you want to get the last day. year - The year in which the month is. RESULT day - The number of the last day the month uses, or 0 if you use an incorrect month. EXAMPLE ... day = date_HeisLastMonthDays(1,1994); /* 31 */ ... NOTES Use this function only for years from 8 to 8000! BUGS None SEE ALSO HeisMonthDays(),JulianLastMonthDay(),GregorianLastMonthDay() Date/HeisLeapYear Date/HeisLeapYear NAME HeisLeapYear -- Checks if a year is a leap year. (V33) SYNOPSIS leapyear = date_HeisLeapYear(year); d0 d0 bool date_HeisLeapYear(const long year); FUNCTION HeisLeapYear checks if a year is a leap year. For years after 1582 see GregorianLeapYear(), The correction from N. Heis says, that all years devideable by 3200 are no longer leap years! For years before 1582 see JulianLeapYear(). INPUTS year - The year which should be checked (from -32768 to 32767) I think only values from 8 to 32767 are valid, because of the variant that was done by Augustus! RESULT leapyear - true if the year is a leap year, otherwise false. EXAMPLE ... if (date_HeisLeapYear(1994)) { printf("leap year!\n"); } else { printf("no leap year!\n"); } ... NOTES A year is now 365.2421875 days! Use this function only for values from 8 to 8000! BUGS No known bugs. SEE ALSO JulianLeapYear(),GregorianLeapYear() Date/HeisMonthDays Date/HeisMonthDays NAME HeisMonthDays -- Returns the number of days of a month. (V33) SYNOPSIS days = date_HeisMonthDays(month,year); d0 d0 d1 unsigned short date_HeisMonthDays(const unsigned short month, const long year); FUNCTION HeisMonthDays returns the number of days a month in a specified year has. For the year 1582 and the month 10 there are only 21 days, because of the Gregorian-reform 10 days are deleted from the month (for more - look out for books about this!) INPUTS month - The month from which you want to get the number of days. year - The year in which the month is. RESULT days - The number of days the month uses, or 0 if you use an incorrect month. EXAMPLE unsigned short days; ... days = date_HeisMonthDays(1,1994); printf("Days of January 1994 : %hu\n",days); ... NOTES Use this function only for years from 8 to 8000! BUGS See GregorianMonthDays! SEE ALSO HeisLeapYear(),JulianMonthDays(),GregorianMonthDays() Date/HeisRangeDiff Date/HeisRangeDiff NAME HeisRangeDiff -- Calculates the range between 2 dates. (V33.297) SYNOPSIS date_HeisRangeDiff(day1,month1,year1,day2,month2,year2,days,months, years); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_HeisRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short *const days, short *const months, long *const years); void date_HeisRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short &days, short &months, long &years); FUNCTION HeisRangeDiff gives you back the number of days, months and years between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). months - The number of months between the two dates (positive if date1 <= date2). years - The number of years between the two dates (positive if date1 <= date2). EXAMPLE short days,months; long years; ... date_HeisRangeDiff(18,9,1970,25,1,1994); printf("Age of Kai Hofmann is : %ld years, %hd months, %hd days\n", years,months,days); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS If you use on of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist! SEE ALSO HeisDayDiff(),HeisDiffDateRange(), JulianRangeDiff(),GregorianRangeDiff() Date/HeisToJD Date/HeisToJD NAME HeisToJD -- Returns the JD for a date. (V33) SYNOPSIS jd = date_HeisToJD(day,month,year); d0 d0 d1 d2 unsigned long date_HeisToJD(const unsigned short day, const unsigned short month, const long year); FUNCTION Returns the JD for a Heis date. INPUTS day - day of the date to convert month - month of the date to convert year - year of the date to convert RESULT jd - This is the JD EXAMPLE ... jd = date_HeisToJD(23,1,1994); ... NOTES It is better to use this function only from 8 to 3267! BUGS unknown. SEE ALSO HSYearToJD(),HYearToScaliger(),HeisDayDiff(),JulianToJD(),HeisToJD() Date/HeisWeek Date/HeisWeek NAME HeisWeek -- Gets the number of the week for a specified date. (V33) SYNOPSIS weeknr = date_HeisWeek(day,month,year); d0 d0 d1 d2 unsigned short date_HeisWeek(const unsigned short day, const unsigned short month, const long year); FUNCTION HeisWeek gets the number of the week for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT week - This is the number of the week the specified date lies in. If the first day in a new year is a Friday, Saturday or Sunday, this would be the last week of the last year! If the 29.12. is a Monday, the 30.12. is a Monday or a Tuesday, the 31.12. is a Monday, Tuesday or a Wednesday this is the first week of the next year! EXAMPLE ... weeknr = date_HeisWeek(4,10,1582); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS For years < 0 errors could occur. SEE ALSO JulianWeek(),GregorianWeek(),HeisWeekday(),HeisDayDiff(), SetFirstWeekday() Date/HeisWeekday Date/HeisWeekday NAME HeisWeekday -- Gets the weekday of a specified date. (V33) SYNOPSIS weekday = date_HeisWeekday(day,month,year); d0 d0 d1 d2 date_Weekdays date_HeisWeekday(const unsigned short day, unsigned short month, long year); FUNCTION HeisWeekday gets the weekday for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT weekday - This result is of type: date_Weekdays = {date_dayerr,date_Monday,date_Tuesday, date_Wednesday,date_Thrusday,date_Friday, date_Saturday,date_Sunday}; date_dayerr will show you, that an error occurs! EXAMPLE ... weekday = date_HeisWeekday(22,1,1994); if (weekday == date_dayerr) { ... } ... NOTES It is better only to use this function for years from 8 to 8000! In this version date_dayerr will only occur for the lost days :) BUGS It is not possible to use year < 0 (see JulianWeekday() for more). SEE ALSO JulianWeekday(),GregorianWeekday() Date/HeisWWtoDM Date/HeisWWtoDM NAME HeisWWtoDM -- Convert Weekday,Week to Day,Month. (V33.243) SYNOPSIS date_HeisWWtoDM(weekday,week,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_HeisWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_HeisWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Converts weekday,week to day,month. INPUTS weekday - weekday of the date to convert week - week of the date to convert year - year of the date to convert RESULT day - day of the converted date month - month of the converted date year - year of the converted date EXAMPLE unsigned short day,month; long year; ... date_HeisWWtoDM(date_Thursday,14,1997,&day,&month,&year); /* 1997-04-03 */ ... NOTES It is better to use this function only from 8 to 8000! Be careful, the resulting year might be different from the input year! BUGS unknown. SEE ALSO GregorianWWtoDM(), HeisWWtoDM() Date/HeisYearDays Date/HeisYearDays NAME HeisYearDays -- Gives back the number of days in a year. (V33) SYNOPSIS days = date_HeisYearDays(year); d0 d0 unsigned short date_HeisYearDays(const long year); FUNCTION HeisYearDays gives you back the number of days in a specified year. INPUTS year - The year in which to count the days. RESULT days - The number of days the year uses. EXAMPLE unsigned short days; ... days = date_HeisYearDays(1994); printf("Days of 1994 : %hu\n",days); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS No known bugs. SEE ALSO HeisMonthDays(),JulianYearDays(),GregorianYearDays() Date/HSYearToJD Date/HSYearToJD NAME HSYearToJD -- Calcs the JD from a Scaliger year. (V33) SYNOPSIS jd = date_HSYearToJD(syear); d0 d0 unsigned long date_HSYearToJD(const unsigned long syear); FUNCTION Returns the Julianday of a Scaliger year. INPUTS syear - Scaliger year RESULT jd - The Julianday EXAMPLE ... jd = date_HSYearToJD(6700); ... NOTES It is better to use this function only from 4707 to 7981! In this version only date_GSYearToJD() is called, because the Scaliger period is only valid to 3268 BUGS unknown. SEE ALSO JSYearToJD(),GSYearToJD() Date/HYearToScaliger Date/HYearToScaliger NAME HYearToScaliger -- Returns the year as Scaliger year. (V33) SYNOPSIS syear = date_HYearToScaliger(year); d0 d0 unsigned long date_HYearToScaliger(const long year); FUNCTION Returns the Scaliger year. INPUTS year - Heis year RESULT syear - The Scaliger year EXAMPLE ... syear = date_HYearToScaliger(1994); ... NOTES It is better to use this function only from 8 to 8000! BUGS The Scaliger period is defined to 3268!!!. SEE ALSO JYearToScaliger(),GYearToScaliger() Date/JDToDate Date/JDToDate NAME JDToDate -- Returns the date for a JD. (V33.310) SYNOPSIS date_JDToDate(jd,day,month,year,calendar); d0 a0 a1 a2 d1 void date_JDToDate(const unsigned long jd, unsigned short *const day, unsigned short *const month, long *const year, const date_Calendars calendar); void date_JDToDate(const unsigned long jd, unsigned short &day, unsigned short &month, long &year, const date_Calendars calendar); FUNCTION Returns the date for a JD. INPUTS jd - This is the given JD. calendar - Calendar system to use RESULT day - Day of the date. month - Month of the date. year - Year of the date. EXAMPLE ... date_JDToDate(2299161,&day,&month,&year,date_Gregorian); ... NOTES It is better to use this function only from 1718867 to 2889835! BUGS unknown. SEE ALSO JDToJulian(),JDToGregorian(),JDToHeis() Date/JDToGregorian Date/JDToGregorian NAME JDToGregorian -- Returns the Gregorian date for a JD. (V33.095) SYNOPSIS date_JDToGregorian(jd,day,month,year); d0 a0 a1 a2 void date_JDToGregorian(const unsigned long jd, unsigned short *const day, unsigned short *const month, long *const year); void date_JDToGregorian(const unsigned long jd, unsigned short &day, unsigned short &month, long &year); FUNCTION Returns the Gregorian date for a JD. INPUTS jd - This is the given JD. RESULT day - Day of the date. month - Month of the date. year - Year of the date. EXAMPLE ... date_JDToGregorian(2299161,&day,&month,&year); ... NOTES It is better to use this function only from 1718867 to 2889835! BUGS unknown. SEE ALSO JDToJulian(),JDToHeis() Date/JDToHeis Date/JDToHeis NAME JDToHeis -- Returns the Heis date for a JD. (V33.095) SYNOPSIS date_JDToHeis(jd,day,month,year); d0 a0 a1 a2 void date_JDToHeis(const unsigned long jd, unsigned short *const day, unsigned short *const month, long *const year); void date_JDToHeis(const unsigned long jd, unsigned short &day, unsigned short &month, long &year); FUNCTION Returns the Heis date for a JD. INPUTS jd - This is the given JD. RESULT day - Day of the date. month - Month of the date. year - Year of the date. EXAMPLE ... date_JDToHeis(2299161,&day,&month,&year); ... NOTES At the moment this is only a dummy to date_JDToGregorian, so: It is better to use this function only from 1718867 to 2889835! BUGS unknown. SEE ALSO JDToJulian(), JDToGregorian() Date/JDToJulian Date/JDToJulian NAME JDToJulian -- Returns the Julian date for a JD. (V33.095) SYNOPSIS date_JDToJulian(jd,day,month,year); d0 a0 a1 a2 void date_JDToJulian(const unsigned long jd, unsigned short *const day, unsigned short *const month, long *const year); void date_JDToJulian(const unsigned long jd, unsigned short &day, unsigned short &month, long &year); FUNCTION Returns the Julian date for a JD. INPUTS jd - This is the given JD. RESULT day - Day of the date. month - Month of the date. year - Year of the date. EXAMPLE ... date_JDToJulian(2299160,&day,&month,&year); ... NOTES It is better to use this function only from 1718867 to 2299160! BUGS unknown. SEE ALSO JDToGregorian(),JDToHeis() Date/JDtoMJD Date/JDtoMJD NAME JDtoMJD -- Switches from JD to MJD. (V33) SYNOPSIS mjd = date_JDtoMJD(jd); d0 d0 unsigned long date_JDtoMJD(const unsigned long jd); FUNCTION Returns the Modified Julianday of a Julianday. INPUTS jd - Julianday RESULT mjd - The Modified Julianday EXAMPLE ... mjd = date_JDtoMJD(2449354); ... NOTES none BUGS Only use this function for jd > 2400001, because mjd is only defined for this, otherwise system will crash! SEE ALSO MJDtoJD() Date/JDToTime Date/JDToTime NAME JDToTime -- Returns the real time for a JD time. (V33) SYNOPSIS time_JDToTime(jd,rhour,rmin,rsec); d0 a0 a1 a2 void time_JDToTime(float jd, unsigned short *const rhour, unsigned short *const rmin, unsigned short *const rsec); void time_JDToTime(float jd, unsigned short &rhour, unsigned short &rmin, unsigned short &rsec); FUNCTION Returns the real time for a JD time. INPUTS jd - JD time RESULT rhour - 24 hour real time rmin - real minutes rsec - real seconds EXAMPLE ... time_JDToTime(0.76543,&rhour,&rmin,&rsec); ... NOTES none. BUGS If jd is > 0 (including days) there will be occur arithmetic bugs! SEE ALSO TimeToJD() Date/JSYearToJD Date/JSYearToJD NAME JSYearToJD -- Calcs the JD from a Scaliger year. (V33) SYNOPSIS jd = date_JSYearToJD(syear); d0 d0 unsigned long date_JSYearToJD(const unsigned long syear); FUNCTION Returns the Julianday of a Scaliger year. INPUTS syear - Scaliger year RESULT jd - The Julianday EXAMPLE ... jd = date_JSYearToJD(4800); ... NOTES It is better to use this function only from 4707 to 6295! BUGS unknown. SEE ALSO GSYearToJD(),HSYearToJD() Date/JulianDayDiff Date/JulianDayDiff NAME JulianDayDiff -- Calculates the days between 2 dates. (V33) SYNOPSIS days = date_JulianDayDiff(day1,month1,year1,day2,month2,year2); d0 d0 d1 d2 d3 d4 d5 long date_JulianDayDiff(const unsigned short day1, unsigned short month1, long year1, const unsigned short day2, unsigned short month2, long year2); FUNCTION JulianDayDiff gives you back the number of days between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). EXAMPLE long days; ... days = date_JulianDayDiff(18,9,1970,22,1,1994); printf("Age of Kai Hofmann in days : %ld\n",days); ... NOTES It is better only to use this function for years from 8 to 1582! BUGS No known bugs. SEE ALSO JulianLeapYear(),JulianMonthDays(),JulianYearDays(), GregorianDayDiff(),HeisDayDiff() Date/JulianDaysAfterWeekday Date/JulianDaysAfterWeekday NAME JulianDaysAfterWeekday -- Returns the diff to the wday after. (V33) SYNOPSIS days = date_JulianDaysAfterWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_JulianDaysAfterWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday after the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 5! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days after to the searched weekday. EXAMPLE ... days = date_JulianDaysAfterWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 1582! BUGS See JulianWeekday()! SEE ALSO JulianWeekday(),GregorianDaysAfterWeekday(),HeisDaysAfterWeekday() Date/JulianDaysBeforeWeekday Date/JulianDaysBeforeWeekday NAME JulianDaysBeforeWeekday -- Returns the diff to the wday before. (V33) SYNOPSIS days = date_JulianDaysBeforeWeekday(day,month,year,weekday); d0 d0 d1 d2 d3 unsigned short date_JulianDaysBeforeWeekday(const unsigned short day, const unsigned short month, const long year, const date_Weekdays weekday); FUNCTION Returns the days to the weekday before the specified date. If you specify the 22.1.1994 (Saturday) and Thursday you get back 2! If you specify the 22.1.1994 and Saturday you get back 0 (the same day)! INPUTS day - day of the date month - month of the date year - year of the date weekday - weekday to search for building difference RESULT days - The days gets you back to the searched weekday (0-6) If you get back an 8 an error occurs! EXAMPLE ... days = date_JulianDaysBeforeWeekday(22,1,1994,Thursday); ... NOTES It is better to use this function only from 8 to 02.1582! BUGS See JulianWeekday()! SEE ALSO JulianWeekday(),GregorianDaysBeforeWeekday(),HeisDaysBeforeWeekday() Date/JulianDiffDate Date/JulianDiffDate NAME JulianDiffDate -- Returns the date for a diff to another date. (V33) SYNOPSIS date_JulianDiffDate(day,month,year,days,dday,dmonth,dyear); d0 d1 d2 d3 a0 a1 a2 void date_JulianDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_JulianDiffDate(const unsigned short day, const unsigned short month, const long year, long days, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies days before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_JulianDiffDate(23,1,1994,7,&dday,&dmonth,&dyear); ... NOTES This function is OBSOLETE - please use JulianDiffDateRange() instead! It is better to use this function only from 8 to 1582! BUGS unknown. SEE ALSO JulianDayDiff(),JulianMonthDays(),GregorianDiffDate(),HeisDiffDate() Date/JulianDiffDateRange Date/JulianDiffDateRange NAME JulianDiffDateRange -- Calc new date from old one and diff. (V33.296) SYNOPSIS date_JulianDiffDateRange(day,month,year,days,months, years,dday,dmonth,dyear); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_JulianDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_JulianDiffDateRange(const unsigned short day, const unsigned short month, const long year, long days, long months, long years, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the date which lies diffrange before/after the specified date. INPUTS day - day of the date month - month of the date year - year of the date days - difference to the date in days months - difference to the date in months years - difference to the date in years RESULT dday - Destination day dmonth - Destination month dyear - Destination year EXAMPLE ... date_JulianDiffDateRange(23,1,1994,0,0,1,&dday,&dmonth,&dyear); ... NOTES It is better to use this function only from 8 to 1582! BUGS unknown. SEE ALSO JulianDiffDate(),JulianRangeDiff(),GregorianDiffDateRange(), HeisDiffDateRange() Date/JulianEaster Date/JulianEaster NAME JulianEaster -- Returns the date of Easter in a year (V33.097) SYNOPSIS date_JulianEaster(year,dday,dmonth); d0 a0 a1 void date_JulianEaster(const long year, unsigned short *const dday, unsigned short *const dmonth); void date_JulianEaster(const long year, unsigned short &dday, unsigned short &dmonth); FUNCTION Returns the date of Easter for a specified year. INPUTS year - Easter is calculated for this year RESULT dday - day of Easter Sunday dmonth - month of Easter Sunday EXAMPLE ... date_JulianEaster(1994,&dday,&dmonth); ... NOTES Use this only for 31 to 1582! BUGS None. SEE ALSO GregorianEaster(),HeisEaster() Date/JulianLastMonthDay Date/JulianLastMonthDay NAME JulianLastMonthDay -- The number of last day in a month. (V33.234) SYNOPSIS day = date_JulianLastMonthDay(month,year); d0 d0 d1 unsigned short date_JulianLastMonthDay(const unsigned short month, const long year); FUNCTION JulianLastMonthDay returns the number of the last day for a given month. INPUTS month - The month from which you want to get the last day. year - The year in which the month is. RESULT day - The number of the last day the month uses, or 0 if you use an incorrect month. EXAMPLE ... day = date_JulianLastMonthDay(1,1994); /* 31 */ ... NOTES It is better only to use this function for years from 8 to 09.1582! BUGS No known bugs. SEE ALSO JulianMonthDays(),GregorianLastMonthDay(),HeisLastMonthDay() Date/JulianLeapYear Date/JulianLeapYear NAME JulianLeapYear -- Checks if a year is a leap year. (V33) SYNOPSIS leapyear = date_JulianLeapYear(year); d0 d0 bool date_JulianLeapYear(const long year); FUNCTION JulianLeapYear checks if a year is a leap year in the Julian calendar For years after Chr. it checks if the year is devideable by 4. For years before Chr. a leap year must have a modulo 4 value of 1 INPUTS year - The year which should be checked (from -32768 to 32767) I think only values from 8 to 32767 are valid, because of the variant that was done by Augustus! RESULT leapyear - true if the year is a leap year, otherwise false. EXAMPLE ... if (date_JulianLeapYear(1994)) { printf("leap year!\n"); } else { printf("no leap year!\n"); } ... NOTES A year is 365.25 days long! Use this function only for values from 8 to 1582! BUGS No known bugs. SEE ALSO GregorianLeapYear(),HeisLeapYear() Date/JulianMonthDays Date/JulianMonthDays NAME JulianMonthDays -- Returns the number of days of a month. (V33) SYNOPSIS days = date_JulianMonthDays(month,year); d0 d0 d1 unsigned short date_JulianMonthDays(const unsigned short month, const long year); FUNCTION JulianMonthDays returns the number of days a month in a specified year has. INPUTS month - The month from which you want to get the number of days. year - The year in which the month is. RESULT days - The number of days the month uses, or 0 if you use an incorrect month. EXAMPLE unsigned short days; ... days = date_JulianMonthDays(1,1994); printf("Days of January 1994 : %hu\n",days); ... NOTES It is better only to use this function for years from 8 to 09.1582! BUGS No known bugs. SEE ALSO JulianLeapYear(),GregorianMonthDays(),HeisMonthDays() Date/JulianRangeDiff Date/JulianRangeDiff NAME JulianRangeDiff -- Calculates the range between 2 dates. (V33.297) SYNOPSIS date_JulianRangeDiff(day1,month1,year1,day2,month2,year2,days,months, years); d0 d1 d2 d3 d4 d5 a0 a1 a2 void date_JulianRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short *const days, short *const months, long *const years); void date_JulianRangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short &days, short &months, long &years); FUNCTION JulianRangeDiff gives you back the number of days, months and years between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date RESULT days - The number of days between the two dates (positive if date1 <= date2). months - The number of months between the two dates (positive if date1 <= date2). years - The number of years between the two dates (positive if date1 <= date2). EXAMPLE short days,months; long years; ... date_JulianRangeDiff(18,9,1970,25,1,1998,&days,&months,&years); printf("Age of Kai Hofmann is : %ld years, %hd months, %hd days\n", years,months,days); ... NOTES It is better only to use this function for years from 8 to 1582! BUGS No known bugs. SEE ALSO JulianDayDiff(),JulianDiffDateRange(),GregorianRangeDiff(), HeisRangeDiff() Date/JulianToJD Date/JulianToJD NAME JulianToJD -- Returns the JD for a date. (V33) SYNOPSIS jd = date_JulianToJD(day,month,year); d0 d0 d1 d2 unsigned long date_JulianToJD(const unsigned short day, const unsigned short month, const long year); FUNCTION Returns the JD for a Julian date. INPUTS day - day of the date to convert month - month of the date to convert year - year of the date to convert RESULT jd - This is the JD EXAMPLE ... jd = date_JulianToJD(23,1,1994); ... NOTES It is better to use this function only from 8 to 1582! BUGS unknown. SEE ALSO JSYearToJD(),JYearToScaliger(),JulianDayDiff(),GregorianToJD(), HeisToJD() Date/JulianWeek Date/JulianWeek NAME JulianWeek -- Gets the number of the week for a specified date. (V33) SYNOPSIS weeknr = date_JulianWeek(day,month,year); d0 d0 d1 d2 unsigned short date_JulianWeek(const unsigned short day, const unsigned short month, const long year); FUNCTION JulianWeek gets the number of the week for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT week - This is the number of the week the specified date lies in. If the first day in a new year is a Friday, Saturday or Sunday, this would be the last week of the last year! If the 29.12. is a Monday, the 30.12. is a Monday or a Tuesday, the 31.12. is a Monday, Tuesday or a Wednesday this is the first week of the next year! EXAMPLE ... weeknr = date_JulianWeek(4,10,1582); ... NOTES It is is better only to use this function for years from 8 to 1582! BUGS For years < 0 errors could occur. SEE ALSO GregorianWeek(),HeisWeek(),JulianWeekday(),JulianDayDiff(), SetFirstWeekday() Date/JulianWeekday Date/JulianWeekday NAME JulianWeekday -- Gets the weekday of a specified date. (V33) SYNOPSIS weekday = date_JulianWeekday(day,month,year); d0 d0 d1 d2 date_Weekdays date_JulianWeekday(const unsigned short day, unsigned short month, long year); FUNCTION JulianWeekday gets the weekday for a specified date. INPUTS day - day of the date month - month of the date year - year of the date RESULT weekday - This result is of type: date_Weekdays = {date_dayerr,date_Monday,date_Tuesday, date_Wednesday,date_Thursday,date_Friday, date_Saturday,date_Sunday}; dayerr will show you, that an error occurs! EXAMPLE ... weekday = date_JulianWeekday(4,10,1582); if (weekday == dayerr) { ... } ... NOTES It is better only to use this function for years from 8 to 4.10.1582! In this version no dayerr will occur! BUGS For years <= 0 errors could occur, or systemcrashs(?). SEE ALSO GregorianWeekday(),HeisWeekday() Date/JulianWWtoDM Date/JulianWWtoDM NAME JulianWWtoDM -- Convert Weekday,Week to Day,Month. (V33.243) SYNOPSIS date_JulianWWtoDM(weekday,week,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_JulianWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_JulianWWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Converts weekday,week to day,month. INPUTS weekday - weekday of the date to convert week - week of the date to convert year - year of the date to convert RESULT day - day of the converted date month - month of the converted date year - year of the converted date EXAMPLE unsigned short day,month; long year; ... date_JulianWWtoDM(date_Thursday,14,1997,&day,&month,&year); /* 1997-04-03 */ ... NOTES It is better to use this function only from 8 to 1582! Be careful, the resulting year might be different from the input year! BUGS unknown. SEE ALSO GregorianWWtoDM(), HeisWWtoDM() Date/JulianYearDays Date/JulianYearDays NAME JulianYearDays -- Gives back the number of days in a year. (V33) SYNOPSIS days = date_JulianYearDays(year); d0 d0 unsigned short date_JulianYearDays(const long year); FUNCTION JulianYearDays gives you back the number of days in a specified year. INPUTS year - The year in which to count the days. RESULT days - The number of days the year uses. EXAMPLE unsigned short days; ... days = date_JulianYearDays(1994); printf("Days of 1994 : %hu\n",days); ... NOTES It is better only to use this function for years from 8 to 1581! BUGS No known bugs. SEE ALSO JulianMonthDays(),GregorianYearDays(),HeisYearDays() Date/JYearToScaliger Date/JYearToScaliger NAME JYearToScaliger -- Returns the year as Scaliger year. (V33) SYNOPSIS syear = date_JYearToScaliger(year); d0 d0 unsigned long date_JYearToScaliger(const long year); FUNCTION Returns the Scaliger year. INPUTS year - Julian year RESULT syear - The Scaliger year EXAMPLE ... syear = date_JYearToScaliger(1582); ... NOTES It is better to use this function only from 8 to 1582! BUGS unknown. SEE ALSO GYearToScaliger(),HYearToScaliger() Date/LastMonthDay Date/LastMonthDay NAME LastMonthDay -- The number of last day in a month. (V33.310) SYNOPSIS day = date_LastMonthDay(month,year,calendar); d0 d0 d1 d2 unsigned short date_LastMonthDay(const unsigned short month, const long year, const date_Calendars calendar); FUNCTION LastMonthDay returns the number of the last day for a given month. INPUTS month - The month from which you want to get the last day. year - The year in which the month is. calendar - Calendar system to use RESULT days - The number of the last day the month uses, or 0 if you use an incorrect month. EXAMPLE ... day = date_LastMonthDay(1,1994,date_Gregorian); /* 31 */ ... NOTES Use this function only for years from 8 to 3199! BUGS none. SEE ALSO JulianLastMonthDay(),GregorianLastMonthDay(),HeisLastMonthDay() Date/LeapYear Date/LeapYear NAME LeapYear -- Checks if a year is a leap year. (V33.310) SYNOPSIS leapyear = date_LeapYear(year,calendar); d0 d0 d1 bool date_LeapYear(const long year, const date_Calendars calendar); FUNCTION LeapYear checks if a year is a leap year. INPUTS year - The year which should be checked (from -32768 to 32767) I think only values from 8 to 3200 are valid, because of the variant that was done by Augustus! calendar - Calendar system to use RESULT leapyear - true if the year is a leap year, otherwise false. EXAMPLE ... if (date_LeapYear(1994,date_Gregorian)) { printf("leap year!\n"); } else { printf("no leap year!\n"); } ... NOTES Use this function only for values from 8 to 8000! BUGS No known bugs. SEE ALSO JulianLeapYear(),GregorianLeapYear(),HeisLeapYear() Date/LMT Date/LMT NAME LMT -- Calculates your local time in your timezone (V33) SYNOPSIS secs = time_LMT(secs,meridian,pos); d0 d0 d1 d2 unsigned long time_LMT(const unsigned long secs, const float meridiandegree, const float posdegree); FUNCTION Calculates your Local Mean Time of your place! INPUTS secs - Seconds of the running day (hours*3600+min*60+sec) meridian - Degrees of your timezone-meridian pos - Degrees of your place RESULT secs - Local seconds of the running day EXAMPLE ... secs = time_LMT(76080,-15.0,-8.923055556); ... NOTES none BUGS No errorcheck, if you put in valid degrees (-180 to +180) SEE ALSO Date/LocalToGMT Date/LocalToGMT NAME LocalToGMT -- Converts a local time to GMT (V33.300) SYNOPSIS datetime_LocalToGMT(ljd,lsecs,DST,zonemin,gjd,gsecs); d0 d1 d2 d3 a0 a1 void datetime_LocalToGMT(const unsigned long ljd, const unsigned long lsecs, const bool DST, const short zonemin, unsigned long *const gjd, unsigned long *const gsecs); void datetime_LocalToGMT(const unsigned long ljd, const unsigned long lsecs, const bool DST, const short zonemin, unsigned long &gjd, unsigned long &gsecs); FUNCTION Converts a local date/time pair into a GMT date/time pair. The conversion considers the local daylight savings time. INPUTS ljd - Local Julian Date lsecs - Local time in seconds DST - Daylight saving status zonemin - Time that was added to GMT time to get the local time zone (in minutes -779 to +779) RESULT gjd - GMT Julian Date gsecs - GMT time in seconds EXAMPLE unsigned long gjd,gsecs; ... datetime_LocalToGMT(2450919,37500,true,+60,&gjd,&gsecs); ... NOTES None. BUGS No errorcheck, if you use a valid date/time. SEE ALSO GMTToLocal(), JulianToJD(), GregorianToJD(), HeisToJD(), JDToJulian(), JDToGregorian(), JDToHeis(), TimeToSec(), SecToTime(), TimeZoneFactor() Date/MJDtoJD Date/MJDtoJD NAME MJDtoJD -- Switches from MJD to JD. (V33) SYNOPSIS jd = date_MJDtoJD(mjd); d0 d0 unsigned long date_MJDtoJD(const unsigned long mjd); FUNCTION Returns the Julianday of a Modified Julianday. INPUTS mjd - Modified Julianday RESULT jd - The Julianday EXAMPLE ... jd = date_MJDtoJD(49353); ... NOTES none BUGS unknown. SEE ALSO JDtoMJD() Date/MonthDays Date/MonthDays NAME MonthDays -- Returns the number of days of a month. (V33.310) SYNOPSIS days = date_MonthDays(month,year,calendar); d0 d0 d1 d2 unsigned short date_MonthDays(const unsigned short month, const long year, const date_Calendars calendar); FUNCTION MonthDays returns the number of days a month in a specified year has. For the year 1582 and the month 10 there are only 21 days, because of the -reform 10 days are deleted from the month (for more - look out for books about this!) INPUTS month - The month from which you want to get the number of days. year - The year in which the month is. calendar - Calendar system to use RESULT days - The number of days the month uses, or 0 if you use an incorrect month. EXAMPLE unsigned short days; ... days = date_MonthDays(1,1994,date_Gregorian); printf("Days of January 1994 : %hu\n",days); ... NOTES Use this function only for years from 8 to 8000! BUGS none. SEE ALSO JulianMonthDays(),GregorianMonthDays(),HeisMonthDays() Date/MonthShortText Date/MonthShortText NAME MonthShortText -- Get the month as short text string. (V33.092) SYNOPSIS maxlen = date_MonthShortText(month,mtext,lang); d0 d0 a0 d1 unsigned short date_MonthShortText(const unsigned short month, char *const mtext, const date_Languages lang); FUNCTION This function gets the short text string for the month-number. INPUTS month - Month to transform into a string. mtext - Pointer to a string to fill in the short month-text. lang - Language for which you want the short month-text. RESULT maxlen - Maximum possible length for the short month-string, this should help you if you want to justify the string right or if you want to center it (Normal is three!). 0 indicates an error! EXAMPLE ... char mtxt[4]; ... maxlen = date_MonthShortText(12,&mtxt,English); ... NOTES Languages: Locale : This is an Amiga >= OS2.1 only feature, for <= OS2.0 and other systems it will return English text! BUGS In this version there is no check, if there is enough space in wtext! SEE ALSO WeekdayText(),WeekdayShortText(),MonthText() Date/MonthText Date/MonthText NAME MonthText -- Get the month as text string. (V33.091) SYNOPSIS maxlen = date_MonthText(month,mtext,lang); d0 d0 a0 d1 unsigned short date_MonthText(const unsigned short month, char *const mtext, const date_Languages lang); FUNCTION This function gets the text string for the month-number. INPUTS month - Month to transform into a string. mtext - Pointer to a string to fill in the month-text. lang - Language for which you want the month-text. RESULT maxlen - Maximum possible length for the month-string, this should help you if you want to justify the string right or if you want to center it! 0 indicates an error! EXAMPLE ... char mtxt[20]; ... maxlen = date_MonthText(12,&mtxt,English); ... NOTES Languages: Locale : This is an Amiga >= OS2.1 only feature, for <= OS2.0 and other systems it will return English text! BUGS In this version there is no check, if there is enough space in wtext! SEE ALSO WeekdayText(),WeekdayShortText(),MonthShortText() Date/NextValidDate Date/NextValidDate NAME NextValidDate -- Returns the next valid date (V33.310) SYNOPSIS date_NextValidDate(day,month,year,dday,dmonth,dyear,calendar); d0 d1 d2 a0 a1 a2 d3 void date_NextValidDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear, const date_Calendars calendar); void date_NextValidDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear, const date_Calendars calendar); FUNCTION Returns the next valid date after a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. calendar - Calendar system to use RESULT dday - Day of the next valid date dmonth - Month of the next valid date dyear - Year of the next valid date EXAMPLE ... date_NextValidDate(29,2,2000,&day,&month,&year,date_Gregorian); ... NOTES None. BUGS None. SEE ALSO ValidDate(),NextValidJulianDate(),NextValidGregorianDate(), NextValidHeisDate(),PreviousValidDate() Date/NextValidGregorianDate Date/NextValidGregorianDate NAME NextValidGregorianDate -- Returns the next valid date (V33.236) SYNOPSIS date_NextValidGregorianDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_NextValidGregorianDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_NextValidGregorianDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the next valid date after a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the next valid date dmonth - Month of the next valid date dyear - Year of the next valid date EXAMPLE ... date_NextValidGregorianDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidGregorianDate(),NextValidJulianDate(),NextValidHeisDate(), PreviousValidGregorianDate() Date/NextValidHeisDate Date/NextValidHeisDate NAME NextValidHeisDate -- Returns the next valid date (V33.235) SYNOPSIS date_NextValidHeisDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_NextValidHeisDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_NextValidHeisDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the next valid date after a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the next valid date dmonth - Month of the next valid date dyear - Year of the next valid date EXAMPLE ... date_NextValidHeisDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidHeisDate(),NextValidJulianDate(),NextValidGregorianDate(), PreviousValidHeisDate() Date/NextValidJulianDate Date/NextValidJulianDate NAME NextValidJulianDate -- Returns the next valid date (V33.236) SYNOPSIS date_NextValidJulianDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_NextValidJulianDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_NextValidJulianDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the next valid date after a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the next valid date dmonth - Month of the next valid date dyear - Year of the next valid date EXAMPLE ... date_NextValidJulianDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidJulianDate(),NextValidGregorianDate(),NextValidHeisDate(), PreviousValidJulianDate() Date/NumToDate Date/NumToDate NAME NumToDate -- Returns the real date for a numeric time. (V33.250) SYNOPSIS date_NumToDate(num,day,month,year); d0 a0 a1 a2 void date_NumToDate(long num, unsigned short *const day, unsigned short *const month, long *const year); void date_NumToDate(long num, unsigned short &day, unsigned short &month, long &year); FUNCTION Returns the real date for a numeric time. INPUTS num - Date in numeric format RESULT day - Day of the date. month - Month of the date. year - Year of the date. EXAMPLE ... date_NumToDate(19970628,&day,&month,&year); ... NOTES Negative years will be handled correctly. BUGS None. SEE ALSO DateToNum() Date/NumToTime Date/NumToTime NAME NumToTime -- Returns the real time for a numeric time. (V33.250) SYNOPSIS time_NumToTime(num,rhour,rmin,rsec); d0 a0 a1 a2 void time_NumToTime(unsigned short num, unsigned short *const rhour, unsigned short *const rmin, unsigned short *const rsec); void time_NumToTime(unsigne dshort num, unsigned short &rhour, unsigned short &rmin, unsigned short &rsec); FUNCTION Returns the real time for a numeric time. INPUTS num - Numeric time RESULT rhour - hours rmin - minutes rsec - seconds EXAMPLE ... time_NumToTime(123600,&rhour,&rmin,&rsec); ... NOTES None. BUGS None. SEE ALSO TimeToNum() Date/ParseDate Date/ParseDate NAME ParseDate -- Parses a date string (V33.290) SYNOPSIS pos = date_ParseDate(fmt,dstr,lang,calendar,actualjd, day,month,year,pfmt,plang); d0 d1 d2 d3 d4 a0 a1 a2 a3 d5 short date_ParseDate(const char *const fmt, const char *const dstr, const date_Languages lang, const date_Calendars calendar, const unsigned long actualjd, unsigned short *const day, unsigned short *const month, long *const year, char *const pfmt, date_Languages *const plang); short date_ParseDate(const char *const fmt, const char *const dstr, const date_Languages lang, const date_Calendars calendar, const unsigned long actualjd, unsigned short *const day, unsigned short *const month, long *const year, char *const pfmt, date_Languages &plang); FUNCTION Parses the date from a string. INPUTS fmt - Format template string dstr - Datestring to parse lang - Language to use for strings calendar - Calendar system to use for decoding actualjd - Actual date in JD form pfmt - Buffer for format template of parsed string or NULL RESULT pos - 0 : The string has been parsed successfully. >0 : An error occured during parsing - subtract one to get the position of the error within the string. -1 : Parameter error (one or more pointers are pointing to NULL) -2 : Format template string to long day - Day of the date to format month - Month of the date to format year - Year of the date to format pfmt - Format template of parsed string plang - Parsed language EXAMPLE short retval; unsigned short day,month; long year; char pfmtbuf[20]; date_Languages lang; ... retval = date_ParseDate("%Y-%m-%d","1997-04-03",date_Locale, date_Heis,2450809,&day,&month,&year,pfmtbuf,&lang); ... SYNTAX Syntax of Amiga compatible % commands: %d : Day number with leading 0s %e : Day number with leading spaces %m : Month number with leading 0s %h : Abbreviated month name %b : Abbreviated month name %B : Month name %y : Year using two digits with leading 0s %Y : Year using four digits with leading 0s %j : Julian date %w : Weekday number %a : Abbreviated weekday name %A : Weekday name %U : Week number, taking Sunday as first day of week %W : Week number, taking Monday as first day of week %x : Same as "%m/%d/%y" %D : Same as "%m/%d/%y" Syntax of % commands: %Ddf : Day with leading 0s %Ddv : Day without leading 0s %DDf : Day within the year with leading 0s %DDv : Day within the year without leading 0s %Dmf : Month with leading 0s %Dmv : Month without leading 0s %Dms : Month string %Dma : Abbreviated month string %Dy2f : 2-digit year with leading 0s %Dy2v : 2-digit year without leading 0s %Dy4f : 4-digit year with leading 0s %Dy4v : 4-digit year without leading 0s %Dys : Scaliger year %Dj : JD date %DJ : MJD date %Dwn : Weekday number (1-7) %Dws : Weekday string %Dwa : Abbreviated weekday string %DWf : Weeknumber with leading 0s %DWv : Weeknumber without leading 0s %DMf : Age of the moon (0-30 ?) with leading 0s %DMv : Age of the moon (0-30 ?) without leading 0s NOTES %DMf and %DMv are only pseudo implementations, a date can not be constructed with them. The date-string autodetection knows over 40 date-string formats: (yesterday|today|tomorrow) wdn wdn[,] mmm d[ (yy|yyyy)] wdn[,] d[.][ ]mmm[,][ ][(yy|yyyy)] wdn[,] d[.][ ]m[.][ ][(yy|yyyy)] mmm d[ yyyy] mmm/d[/(yy|yyyy)] mmm-d[-(yy|yyyy)] yyyy[-]Www[-]n yyyy(-|/)m(-|/)d yyyy(-|/)n[n[n]] yy[-]Www[-]n yy-nnn d. mmm [(yy|yyyy)] d.m.[(yy|yyyy)] d-mmm[-(yy|yyyy)] d-m[-yyyy] Detection condition: yyyymmdd | ddmmyyyy (valid date test) jjjjjjj | yyyynnn (1723980 >= JD <= 2914672) JJJJJ JJJJJJ | yymmdd (MJD <= 514671) d-m-yy | yy-m-d (yy > 31 | valid date test) d/m[/yyyy] | m/d/yyyy (valid date test) d/m/yy | m/d/yy | yy/m/d (valid date test) BUGS No known bugs. SEE ALSO FormatDate() Date/ParseTime Date/ParseTime NAME ParseTime -- Parses a time string (V33.282) SYNOPSIS pos = time_ParseTime(fmt,tstr,ChangeDay,ChangeHour,DST,hour,min, sec,zonemin,pfmt); d0 d0 d1 d2 d3 d4 a0 a1 a2 a3 d5 short time_ParseTime(const char *const fmt, const char *const tstr, time_ChangeDay ChangeDay, unsigned short ChangeHour, bool *const DST, unsigned short *const hour, unsigned short *const min, unsigned short *const sec, short *const zonemin, char *const pfmt); FUNCTION Parses the time from a string. INPUTS fmt - Format template string (max. length = 46 characters) tstr - Timestring to parse ChangeDay - Normal day, winter to summer or summer to winter time change day. ChangeHour - Hour of summer/winter time change DST - Daylight saving status zonemin - Time that was added to GMT time to get the local time zone (in minutes -779 to +779) pfmt - Buffer for format template of parsed string or NULL RESULT pos - 0 : The string has been parsed successfully. >0 : An error occured during parsing - subtract one to get the position of the error within the string. -1 : Parameter error (one or more pointers are pointing to NULL) -2 : Format template string to long hour - Hour of the time that was parsed min - Minute of the time that was parsed sec - Second of the time that was parsed DST - Daylight saving status zonemin - Time that was added to GMT time to get the local time zone (in minutes -779 to +779) pfmt - Format template of parsed string EXAMPLE bool DST = false; unsigned short Hour,Min,Sec; short ZoneMin = 60,retval; char pfmtbuf[20]; ... retval = time_ParseTime(NULL,"20:14",time_Normal,2,&DST, &Hour,&Min,&Sec,&ZoneMin,pfmtbuf); ... SYNTAX Syntax of Amiga compatible format template % strings: %q : Hour using 24-hour style %H : Hour using 24-hour style with leading 0s %Q : Hour using 12-hour style %I : Hour using 12-hour style with leading 0s %p : AM or PM strings %M : The number of minutes with leading 0s %S : Number of seconds with leadings 0s %R : Same as "%H:%M" %X : Same as "%H:%M:%S" %T : Same as "%H:%M:%S" %r : Same as "%I:%M:%S %p" Syntax of format template % commands: %Th1f : 12 with leading 0s %Th1v : 12 without leading 0s %Th2f : 24 with leading 0s %Th2v : 24 without leading 0s %Tpso : a/p %Tpsu : A/P %Tplo : am/pm %Tplu : AM/PM %Tmf : with leading 0s %Tmv : without leading 0s %Tsf : with leading 0s %Tsv : without leading 0s %Tj. : starting with '.' %Tj, : starting with ',' %Tj0 : starting with '0.' %Tj1 : starting with '0,' %Tzh?? : hours only %Tzm? : 0100 %TzM?? : 01:00 %Tz?z? : Use Z for UTC %Tz?0? : Use +00 for UTC %Tz??f : use leading 0s %Tz??v : do not use leading 0s %Tc1 : Use DST for s->w switch %Tc2 : Use I/II for s->w switch %Tc3 : Use a/b for s->w switch (24h only) - on 12h falls back to 2 NOTES None. BUGS No known bugs. SEE ALSO FormatTime() Date/PreviousValidDate Date/PreviousValidDate NAME PreviousValidDate -- Returns the prev. valid date (V33.310) SYNOPSIS date_PreviousValidDate(day,month,year,dday,dmonth,dyear,calendar); d0 d1 d2 a0 a1 a2 d3 void date_PreviousValidDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear, const date_Calendars calendar); void date_PreviousValidDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear, const date_Calendars calendar); FUNCTION Returns the previous valid date before a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. calendar - Calendar system to use RESULT dday - Day of the previous valid date dmonth - Month of the previous valid date dyear - Year of the previous valid date EXAMPLE ... date_PreviousValidDate(29,2,2000,&day,&month,&year,date_Gregorian); ... NOTES None. BUGS None. SEE ALSO ValidDate(),PreviousValidJulianDate(),PreviousValidGregorianDate(), PreviousValidHeisDate(), NextValidDate() Date/PreviousValidGregorianDate Date/PreviousValidGregorianDate NAME PreviousValidGregorianDate -- Returns the prev. valid date (V33.236) SYNOPSIS date_PreviousValidGregorianDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_PreviousValidGregorianDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_PreviousValidGregorianDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the previous valid date before a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the previous valid date dmonth - Month of the previous valid date dyear - Year of the previous valid date EXAMPLE ... date_PreviousValidGregorianDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidGregorianDate(),PreviousValidJulianDate(), PreviousValidHeisDate(), NextValidGregorianDate() Date/PreviousValidHeisDate Date/PreviousValidHeisDate NAME PreviousValidHeisDate -- Returns the previous valid date (V33.235) SYNOPSIS date_PreviousValidHeisDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_PreviousValidHeisDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_PreviousValidHeisDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the previous valid date before a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the previous valid date dmonth - Month of the previous valid date dyear - Year of the previous valid date EXAMPLE ... date_PreviousValidHeisDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidHeisDate(),PreviousValidJulianDate(), PreviousValidGregorianDate(), NextValidHeisDate() Date/PreviousValidJulianDate Date/PreviousValidJulianDate NAME PreviousValidJulianDate -- Returns the prev. valid date (V33.236) SYNOPSIS date_PreviousValidJulianDate(day,month,year,dday,dmonth,dyear); d0 d1 d2 a0 a1 a2 void date_PreviousValidJulianDate(const unsigned short day, const unsigned short month, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear); void date_PreviousValidJulianDate(const unsigned short day, const unsigned short month, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear); FUNCTION Returns the previous valid date before a given one. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT dday - Day of the previous valid date dmonth - Month of the previous valid date dyear - Year of the previous valid date EXAMPLE ... date_PreviousValidJulianDate(29,2,2000,&day,&month,&year); ... NOTES None. BUGS None. SEE ALSO ValidJulianDate(),PreviousValidGregorianDate(), PreviousValidHeisDate(), NextValidJulianDate() Date/RangeDiff Date/RangeDiff NAME RangeDiff -- Calculates the range between 2 dates. (V33.310) SYNOPSIS date_RangeDiff(day1,month1,year1,day2,month2,year2,days, months,years,calendar); d0 d1 d2 d3 d4 d5 a0 a1 a2 d6 void date_RangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short *const days, short *const months, long *const years, const date_Calendars calendar); void date_RangeDiff(unsigned short day1, unsigned short month1, long year1, unsigned short day2, unsigned short month2, long year2, short &days, short &months, long &years, const date_Calendars calendar); FUNCTION RangeDiff gives you back the number of days, months and years between two specified dates. INPUTS day1 - day of the first date month1 - month of the first date year1 - year of the first date day2 - day of the second date month2 - month of the second month year2 - year of the second date calendar - Calendar system to use RESULT days - The number of days between the two dates (positive if date1 <= date2). months - The number of months between the two dates (positive if date1 <= date2). years - The number of years between the two dates (positive if date1 <= date2). EXAMPLE short days,months; long years; ... date_RangeDiff(18,9,1970,25,1,1998,&days,&months,&years, date_Gregorian); printf("Age of Kai Hofmann is : %ld years, %hd months, %hd days\n", years,months,days); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS If you use one of the dates 5.10.1582 to 14.10.1582 you will get an incorrect output because these days don't exist, except in the Julian calendar! SEE ALSO JulianRangeDiff(),GregorianRangeDiff(),HeisRangeDiff() Date/ScaligerYearToG Date/ScaligerYearToG NAME ScaligerYearToG -- Returns the Scaliger year as Gregorian year. (V33) SYNOPSIS year = date_ScaligerYearToG(syear); d0 d0 long date_ScaligerYearToG(const unsigned long syear); FUNCTION Returns the Gregorian year of a Scaliger year. INPUTS syear - Scaliger year RESULT year - The Gregorian year EXAMPLE ... year = date_ScaligerYearToG(6400); ... NOTES It is better to use this function only from 4707 to 7981! BUGS unknown. SEE ALSO ScaligerYearToJ(),ScaligerYearToH() Date/ScaligerYearToH Date/ScaligerYearToH NAME ScaligerYearToH -- Returns the Scaliger year as Heis year. (V33) SYNOPSIS year = date_ScaligerYearToH(syear); d0 d0 long date_ScaligerYearToH(const unsigned long syear); FUNCTION Returns the Heis year of a Scaliger year. INPUTS syear - Scaliger year RESULT year - The Heis year EXAMPLE ... year = date_ScaligerYearToH(7000); ... NOTES It is better to use this function only from 4707 to 7981! BUGS unknown. SEE ALSO ScaligerYearToJ(),ScaligerYearToG() Date/ScaligerYearToJ Date/ScaligerYearToJ NAME ScaligerYearToJ -- Returns the Scaliger year as Julian year. (V33) SYNOPSIS year = date_ScaligerYearToJ(syear); d0 d0 long date_ScaligerYearToJ(const unsigned long syear); FUNCTION Returns the Julian year of a Scaliger year. INPUTS syear - Scaliger year RESULT year - The Julian year EXAMPLE ... year = date_ScaligerYearToJ(4800); ... NOTES It is better to use this function only from 4707 to 6295! BUGS unknown. SEE ALSO ScaligerYearToG(),ScaligerYearToH() Date/ScaligerYearToYear Date/ScaligerYearToYear NAME ScaligerYearToG -- Returns the Scaliger year as year. (V33.310) SYNOPSIS year = date_ScaligerYearToG(syear,calendar); d0 d0 d1 long date_ScaligerYearToG(const unsigned long syear, const date_Calendars calendar); FUNCTION Returns the year of a Scaliger year. INPUTS syear - Scaliger year calendar - Calendar system to use RESULT year - The year EXAMPLE ... year = date_ScaligerYearToG(6400,date_Gregorian); ... NOTES It is better to use this function only from 4707 to 7981! BUGS unknown. SEE ALSO ScaligerYearToJ(),ScaligerYearToG(),ScaligerYearToH() Date/SecToTime Date/SecToTime NAME SecToTime -- Returns the time from seconds (V33) SYNOPSIS time_SecToTime(secs,hour,min,sec); d0 a0 a1 a2 void time_SecToTime(unsigned long secs, unsigned short *const hour, unsigned short *const min, unsigned short *const sec); void time_SecToTime(unsigned long secs, unsigned short &hour, unsigned short &min, unsigned short &sec); FUNCTION Gives you back the time from the specified seconds INPUTS secs - Time in seconds RESULT hour - hours (0-23) min - minutes (0-59) sec - seconds (0-59) EXAMPLE ... time_SecToTime(76860,&hour,&min,&sec); ... NOTES Don't forget to convert 24h time to AM/PM time if needed! BUGS No errorcheck, if you use a valid time SEE ALSO TimeToSec() Date/SetCountry Date/SetCountry NAME SetCountry -- Sets the country defaults for the date lib. (V33.140) SYNOPSIS date_SetCountry(country); d0 void date_SetCountry(const date_Countries country); FUNCTION SetCountry sets the defaults for your country. Like: correct start of Gregorian calendar. INPUTS country - Country to set. RESULT None. EXAMPLE ... date_SetCountry(unknown); ... NOTES Will *not* work correct if something other than 'unknown' is set for the moment! BUGS None. SEE ALSO SetFirstWeekday() Date/SetFirstWeekday Date/SetFirstWeekday NAME SetFirstWeekday -- Sets the FirstWeekday default (V33.165) SYNOPSIS date_SetFirstWeekday(weekday); d0 void date_SetFirstWeekday(const date_Weekdays weekday); FUNCTION SetFirstWeekday sets the weekday with which a week starts. Default is: Monday INPUTS weekday - Weekday to set. RESULT None. EXAMPLE ... date_SetFirstWeekday(Sunday); ... NOTES dayerr can not be set! BUGS None. SEE ALSO SetCountry(),JulianWeek(),GregorianWeek(),HeisWeek() Date/SupplementCentury Date/SupplementCentury NAME SupplementCentury -- Add century for a 2 digit year (V33.165) SYNOPSIS year = date_SupplementCentury(year,actualyear); d0 d0 d1 long date_SupplementCentury(unsigned short year, long actualyear); FUNCTION Supplements the century for a two digit year by comparing it to the actual year, which must be a four digit year. This will be done by using the 'sliding window' technic. INPUTS year - Two digit year which should be supplemented to four digits. actualyear - The actual year as a four digit year. RESULT year - The year known by a four digit format. EXAMPLE ... printf("%ld\n",SupplementCentury(01,1996)); ... NOTES None. BUGS No known bugs. SEE ALSO Date/SYearToJD Date/SYearToJD NAME SYearToJD -- Calcs the JD from a Scaliger year. (V33.310) SYNOPSIS jd = date_SYearToJD(syear,calendar); d0 d0 d1 unsigned long date_SYearToJD(const unsigned long syear, const date_Calendars calendar); FUNCTION Returns the Julianday of a Scaliger year. INPUTS syear - Scaliger year calendar - Calendar system to use RESULT jd - The Julianday EXAMPLE ... jd = date_SYearToJD(4800,date_Gregorian); ... NOTES It is better to use this function only from 4707 to 7981! BUGS unknown. SEE ALSO JSYearToJD(),GSYearToJD(),HSYearToJD() Date/TimeDiff Date/TimeDiff NAME TimeDiff -- Returns the difference in seconds (V33) SYNOPSIS secs = time_TimeDiff(hour1,min1,sec1,hour2,min2,sec2); d0 d0 d1 d2 d3 d4 d5 long time_TimeDiff(const unsigned short hour1, const unsigned short min1, const unsigned short sec1, const unsigned short hour2, const unsigned short min2, const unsigned short sec2); FUNCTION Gives you back the difference between the first and the second time in seconds. INPUTS hour1 - hours of the first time min1 - minutes of the first time sec1 - seconds of the first time hour2 - hours of the second time min2 - minutes of the second time sec2 - seconds of the second time RESULT secs - The difference betwen time1 and time1 in seconds. EXAMPLE ... secs = time_TimeDiff(21,15,00,22,0,0); ... NOTES Don't forget to convert AM/PM time to 24h time! use SecToTime() to convert the seconds back to a hour,min,secs format! BUGS No errorcheck, if you use a valid time SEE ALSO SecToTime(),TimeToSec() Date/TimeToJD Date/TimeToJD NAME TimeToJD -- Returns the JD for a time. (V33) SYNOPSIS jd = time_TimeToJD(hour,min,sec); d0 d0 d1 d2 float time_TimeToJD(const unsigned short hour, const unsigned short min, const unsigned short sec); FUNCTION Returns the JD for a specified time. INPUTS hour - hour of the time to convert min - minute of the time to convert sec - sec. of the time to convert RESULT jd - This is the JD time EXAMPLE ... jd = time_TimeToJD(16,33,0); ... NOTES none BUGS There is no check, if the specified time is a valid time! SEE ALSO JDToTime() Date/TimeToNum Date/TimeToNum NAME TimeToNum -- Returns the time in a numeric format. (V33.250) SYNOPSIS num = time_TimeToNum(hour,min,sec); d0 d0 d1 d2 unsigned long time_TimeToNum(const unsigned short hour, const unsigned short min, const unsigned short sec); FUNCTION Returns the time in a numeric format. INPUTS hour - hour of the time to convert min - minute of the time to convert sec - second of the time to convert RESULT num - Numeric time format: (hour*100+min)*100+sec EXAMPLE ... num = time_TimeToNum(12,31,0); ... NOTES none BUGS There is no check, if the specified time is a valid time! SEE ALSO NumToTime() Date/TimeToSec Date/TimeToSec NAME TimeToSec -- Returns the time in seconds (V33) SYNOPSIS secs = time_TimeToSec(hour,min,sec); d0 d0 d1 d2 unsigned long time_TimeToSec(const unsigned short hour, const unsigned short min, const unsigned short sec); FUNCTION Gives you back the time in seconds INPUTS hour - hours you want (0-23) min - minutes you want (0-59) sec - seconds you want (0-59) RESULT secs - Time in seconds EXAMPLE ... secs = time_TimeToSec(21,15,00); ... NOTES Don't forget to convert AM/PM time to 24h time! BUGS No errorcheck, if you use a valid time SEE ALSO SecToTime() Date/TimeZoneFactor Date/TimeZoneFactor NAME TimeZoneFactor -- Returns the value you have to add to GMT time (V33) SYNOPSIS addhours = time_TimeZoneFactor(degrees); d0 d0 short time_TimeZoneFactor(const short degree); FUNCTION This gives you the hours you have to add to GMT time, specified on the fact, that a timezone is 15 degrees and that GMT is centered on 0 degrees! INPUTS degrees - Position of timezone you live in (from -180 east to +180 west) RESULT addhours - Time to add to GMT time to get your local time zone (-12 to +12) EXAMPLE ... addhours = time_TimeZoneFactor(-8); ... NOTES none BUGS No errorcheck, if you put in valid degrees (-180 to +180) Only full degrees are supportet, keep sure that you round in the right way for 0.x degree places I am not sure about the correct +/- behaviour!!! SEE ALSO Date/ValidDate Date/ValidDate NAME ValidDate -- Checks if the date is a valid date (V33.310) SYNOPSIS valid = date_ValidDate(day,month,year,calendar); d0 d0 d1 d2 d3 bool date_ValidDate(const unsigned short day, const unsigned short month, const long year, const date_Calendars calendar); FUNCTION ValidDate checks if the date is valid. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. calendar - Calendar system to use RESULT valid - true : The date is ok. false : This is not a correct date! EXAMPLE ... if (date_ValidDate(29,2,2000,date_Gregorian)) printf("ok\n"); else printf("wrong date!!!\n"); ... NOTES None. BUGS None. SEE ALSO ValidTime(),ValidJulianDate(),ValidGregorianDate(),ValidHeisDate() Date/ValidGregorianDate Date/ValidGregorianDate NAME ValidGregorianDate -- Checks if the date is a valid date (V33.135) SYNOPSIS valid = date_ValidGregorianDate(day,month,year); d0 d0 d1 d2 bool date_ValidGregorianDate(const unsigned short day, const unsigned short month, const long year); FUNCTION ValidGregorianDate checks if the date is valid. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT valid - true : The date is ok. false : This is not a correct date! EXAMPLE ... if (date_ValidGregorianDate(29,2,2000)) printf("ok\n"); else printf("wrong date!!!\n"); ... NOTES None. BUGS None. SEE ALSO ValidTime(),ValidJulianDate(),ValidHeisDate() Date/ValidHeisDate Date/ValidHeisDate NAME ValidHeisDate -- Checks if the date is a valid date (V33.135) SYNOPSIS valid = date_ValidHeisDate(day,month,year); d0 d0 d1 d2 bool date_ValidHeisDate(const unsigned short day, const unsigned short month, const long year); FUNCTION ValidHeisDate checks if the date is valid. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT valid - true : The date is ok. false : This is not a correct date! EXAMPLE ... if (date_ValidHeisDate(29,2,2000)) printf("ok\n"); else printf("wrong date!!!\n"); ... NOTES None. BUGS None. SEE ALSO ValidTime(),ValidJulianDate(),ValidGregorianDate() Date/ValidJulianDate Date/ValidJulianDate NAME ValidJulianDate -- Checks if the date is a valid date (V33.135) SYNOPSIS valid = date_ValidJulianDate(day,month,year); d0 d0 d1 d2 bool date_ValidJulianDate(const unsigned short day, const unsigned short month, const long year); FUNCTION ValidJulianDate checks if the date is valid. INPUTS day - Day of the date. month - Month of the date. year - Year of the date. RESULT valid - true : The date is ok. false : This is not a correct date! EXAMPLE ... if (date_ValidJulianDate(29,2,2000)) printf("ok\n"); else printf("wrong date!!!\n"); ... NOTES None. BUGS None. SEE ALSO ValidTime(),ValidGregorianDate(),ValidHeisDate() Date/ValidTime Date/ValidTime NAME ValidTime -- Checks if the time is a valid 24h-format time (V33.135) SYNOPSIS valid = time_ValidTime(hour,min,sec); d0 d0 d1 d2 bool time_ValidTime(const unsigned short hour, const unsigned short min, const unsigned short sec); FUNCTION ValidTime checks if the time (24h format only) is valid. INPUTS hour - Hour of the time. min - Minute of the time. sec - Second of the time. RESULT valid - true : The time is ok. false : This is not a correct time! EXAMPLE ... if (time_ValidTime(25,0,0)) printf("ok\n"); else printf("wrong time!!!\n"); ... NOTES None. BUGS None. SEE ALSO ValidJulianDate(),ValidGregorianDate(),ValidHeisDate() Date/Week Date/Week NAME Week -- Gets the weeknumber for a specified date. (V33.310) SYNOPSIS weeknr = date_Week(day,month,year,calendar); d0 d0 d1 d2 d3 unsigned short date_Week(const unsigned short day, const unsigned short month, const long year, const date_Calendars calendar); FUNCTION Week gets the number of the week for a specified date. INPUTS day - day of the date month - month of the date year - year of the date calendar - Calendar system to use RESULT week - This is the number of the week the specified date lies in. If the first day in a new year is a Friday, Saturday or Sunday, this would be the last week of the last year! If the 29.12. is a Monday, the 30.12. is a Monday or a Tuesday, the 31.12. is a Monday, Tuesday or a Wednesday this is the first week of the next year! EXAMPLE ... weeknr = date_Week(4,10,1582,date_Gregorian); ... NOTES It is better only to use this function for years from 8 to 3200! BUGS For years < 0 errors could occur. SEE ALSO JulianWeek(),GregorianWeek(),HeisWeek(),SetFirstWeekday() Date/Weekday Date/Weekday NAME Weekday -- Gets the weekday of a specified date. (V33.310) SYNOPSIS weekday = date_Weekday(day,month,year,calendar); d0 d0 d1 d2 d3 date_Weekdays date_Weekday(const unsigned short day, unsigned short month, long year, const date_Calendars calendar); FUNCTION Weekday gets the weekday for a specified date. INPUTS day - day of the date month - month of the date year - year of the date calendar - Calendar system to use RESULT weekday - This result is of type: date_Weekdays = {date_dayerr,date_Monday,date_Tuesday, date_Wednesday,date_Thursday,date_Friday, date_Saturday,date_Sunday}; dayerr will show you, that an error occurs! EXAMPLE ... weekday = date_Weekday(22,1,1994,date_Gregorian); if (weekday == dayerr) { ... } ... NOTES It is better only to use this function for years from 8 to 3200! In this version dayerr will only occur for the lost days :) BUGS It's not possible to use years < 0 (for more see JulianWeekday()). SEE ALSO JulianWeekday(),GregorianWeekday(),HeisWeekday() Date/WeekdayShortText Date/WeekdayShortText NAME WeekdayShortText -- Get the weekday as short text string. (V33.092) SYNOPSIS maxlen = date_WeekdayShortText(wday,wtext,lang); d0 d0 a0 d1 unsigned short date_WeekdayShortText(const date_Weekdays wday, char *const wtext, const date_Languages lang); FUNCTION This function gets the short text string for the weekday-number. INPUTS wday - Weekday to transform into a string. wtext - Pointer to a string to fill in the short weekday-text. lang - Language for which you want the short weekday-text. RESULT maxlen - Maximum possible length for the weekday-string, this should help you if you want to justify the string right or if you want to center it! (Normally it's two or three!) 0 indicates an error! EXAMPLE ... char wtxt[3]; ... maxlen = date_WeekdayShortText(Monday,&wtxt,English); ... NOTES Languages: Locale : This is an Amiga >= OS2.1 only feature, for <= OS2.0 and other systems it will return English text! BUGS In this version there is no check, if there is enough space in wtext! SEE ALSO WeekdayText(),MonthText(),MonthShortText() Date/WeekdayText Date/WeekdayText NAME WeekdayText -- Get the weekday as text string. (V33.091) SYNOPSIS maxlen = date_WeekdayText(wday,wtext,lang); d0 d0 a0 d1 unsigned short date_WeekdayText(const date_Weekdays wday, char *const wtext, const date_Languages lang); FUNCTION This function gets the text string for the weekday-number. INPUTS wday - Weekday to transform into a string. wtext - Pointer to a string to fill in the weekday-text. lang - Language for which you want the weekday-text. RESULT maxlen - Maximum possible length for the weekday-string, this should help you if you want to justify the string right or if you want to center it! 0 indicates an error! EXAMPLE ... char wtxt[20]; ... maxlen = date_WeekdayText(Monday,&wtxt,English); ... NOTES Languages: Locale : This is an Amiga >= OS2.1 only feature, for <= OS2.0 and other systems it will return English text! BUGS In this version there is no check, if there is enough space in wtext! SEE ALSO MonthText(),WeekdayShortText(),MonthShortText() Date/WWtoDM Date/WWtoDM NAME WWtoDM -- Convert Weekday,Week to Day,Month. (V33.310) SYNOPSIS date_WWtoDM(weekday,week,year,dday,dmonth,dyear,calendar); d0 d1 d2 a0 a1 a2 d3 void date_WWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short *const dday, unsigned short *const dmonth, long *const dyear, const date_Calendars calendar); void date_WWtoDM(const date_Weekdays weekday, const unsigned short week, const long year, unsigned short &dday, unsigned short &dmonth, long &dyear, const date_Calendars calendar); FUNCTION Converts weekday,week to day,month. INPUTS weekday - weekday of the date to convert week - week of the date to convert year - year of the date to convert calendar - Calendar system to use RESULT day - day of the converted date month - month of the converted date year - year of the converted date EXAMPLE unsigned short day,month; long year; ... date_WWtoDM(date_Thursday,14,1997,&day,&month,&year,date_Gregorian); /* 1997-04-03 */ ... NOTES It is better to use this function only from 8 to 8000! Be careful, the resulting year might be different from the input year! BUGS unknown. SEE ALSO JulianWWtoDM(),GregorianWWtoDM(),HeisWWtoDM() Date/YearDays Date/YearDays NAME YearDays -- Gives back the number of days in a year. (V33.310) SYNOPSIS days = date_YearDays(year,calendar); d0 d0 d1 unsigned short date_YearDays(const long year, const date_Calendars calendar); FUNCTION YearDays gives you back the number of days in a specified year. INPUTS year - The year in which to count the days. calendar - Calendar system to use RESULT days - The number of days the year uses. EXAMPLE unsigned short days; ... days = date_YearDays(1994,date_Gregorian); printf("Days of 1994 : %hu\n",days); ... NOTES It is better only to use this function for years from 8 to 8000! BUGS No known bugs. SEE ALSO JulianYearDays(),GregorianYearDays(),HeisYearDays() Date/YearToScaliger Date/YearToScaliger NAME YearToScaliger -- Returns the year as Scaliger year. (V33.310) SYNOPSIS syear = date_YearToScaliger(year,calendar); d0 d0 d1 unsigned long date_YearToScaliger(const long year, const date_Calendars calendar); FUNCTION Returns the Scaliger year. INPUTS year - year calendar - Calendar system to use RESULT syear - The Scaliger year EXAMPLE ... syear = date_YearToScaliger(1994,date_Gregorian); ... NOTES It is better to use this function only from 8 to 3200! BUGS unknown. SEE ALSO JYearToScaliger(),GYearToScaliger(),HYearToScaliger()