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/* date.h: header files for time/date functions
Copyright (C) 2010, Project Pluto
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#ifdef __cplusplus
extern "C" {
#endif
long DLL_FUNC dmy_to_day( const int day, const int month, const long year,
const int calendar);
void DLL_FUNC day_to_dmy( const long jd, int DLLPTR *day,
int DLLPTR *month, long DLLPTR *year, const int calendar);
void DLL_FUNC full_ctime( char *buff, double jd, const int format);
void DLL_FUNC full_ctimel( char *buff, long double t2k, const int format);
const char * DLL_FUNC set_month_name( const int month, const char *new_name);
const char * DLL_FUNC set_day_of_week_name( const int day_of_week,
const char *new_name);
double DLL_FUNC decimal_day_to_dmy( double jd, long *year, int *month,
const int calendar);
double DLL_FUNC split_time( double jd, long *year, int *month, int *day,
int *hr, int *min, const int time_format);
long double DLL_FUNC split_timel( long double t2k, long *year, int *month, int *day,
int *hr, int *min, const int time_format);
double DLL_FUNC get_time_from_string( double initial_jd,
const char *time_str, const int time_format, int *is_ut);
long double DLL_FUNC get_time_from_stringl( long double initial_t2k,
const char *time_str, const int time_format, int *is_ut);
#define FULL_CTIME_FORMAT_MASK 0x700
#define FULL_CTIME_FORMAT_SECONDS 0x000
#define FULL_CTIME_FORMAT_HH_MM 0x100
#define FULL_CTIME_FORMAT_HH 0x200
#define FULL_CTIME_FORMAT_DAY 0x300
#define FULL_CTIME_FORMAT_YEAR 0x400
#define FULL_CTIME_FORMAT_JD 0x500
#define FULL_CTIME_FORMAT_MJD 0x600
#define FULL_CTIME_YEAR_FIRST 0x800
#define FULL_CTIME_YEAR_LAST 0
#define FULL_CTIME_MONTH_DAY 0x1000
#define FULL_CTIME_DAY_MONTH 0
#define FULL_CTIME_MONTHS_AS_DIGITS 0x2000
#define FULL_CTIME_TIME_ONLY 0x4000
#define FULL_CTIME_LEADING_ZEROES 0x8000
#define FULL_CTIME_TWO_DIGIT_YEAR 0x10000
#define FULL_CTIME_NO_YEAR 0x20000
#define FULL_CTIME_DAY_OF_WEEK_FIRST 0x40000
#define FULL_CTIME_DAY_OF_WEEK_LAST 0x80000
#define FULL_CTIME_NO_SPACES 0x100000
#define FULL_CTIME_ROUNDING 0x200000
#define FULL_CTIME_NO_COLONS 0x400000
/* Some convenience combos of the above flags: */
#define FULL_CTIME_YMD (FULL_CTIME_YEAR_FIRST | FULL_CTIME_MONTH_DAY)
#define FULL_CTIME_YDM (FULL_CTIME_YEAR_FIRST | FULL_CTIME_DAY_MONTH)
#define FULL_CTIME_DMY (FULL_CTIME_YEAR_LAST | FULL_CTIME_DAY_MONTH)
#define FULL_CTIME_MDY (FULL_CTIME_YEAR_LAST | FULL_CTIME_MONTH_DAY)
/* "date only" = show in days with zero decimal places: */
#define FULL_CTIME_DATE_ONLY FULL_CTIME_FORMAT_DAY
#define FULL_CTIME_TENTHS_SEC 0x10
#define FULL_CTIME_WHOLE_SECONDS 0
#define FULL_CTIME_HUNDREDTH_SEC 0x20
#define FULL_CTIME_MILLISECS 0x30
/* The above four lines are accurate, but the meaning of those bits is */
/* now more general: bits 4-7 describe the number of decimal places. */
/* Thus, 0x30 could mean milliseconds, or milliminutes, or millidays. */
/* And up to fifteen decimal places can be shown... though I'd expect */
/* serious loss of precision with 64-bit floating-point math! */
#define FULL_CTIME_0_PLACES 0
#define FULL_CTIME_1_PLACE 0x10
#define FULL_CTIME_2_PLACES 0x20
#define FULL_CTIME_3_PLACES 0x30
#define FULL_CTIME_4_PLACES 0x40
#define FULL_CTIME_5_PLACES 0x50
#define FULL_CTIME_6_PLACES 0x60
#define FULL_CTIME_7_PLACES 0x70
#define FULL_CTIME_8_PLACES 0x80
#define FULL_CTIME_9_PLACES 0x90
#define FULL_CTIME_10_PLACES 0xa0
#define FULL_CTIME_11_PLACES 0xb0
#define FULL_CTIME_12_PLACES 0xc0
#define FULL_CTIME_13_PLACES 0xd0
#define FULL_CTIME_14_PLACES 0xe0
#define FULL_CTIME_15_PLACES 0xf0
/* Some convenience macros combining units and defined number of decimal */
/* places... also given just as examples of how to mix-and-match your own: */
#define FULL_CTIME_DECIMINUTES (FULL_CTIME_FORMAT_HH_MM | FULL_CTIME_1_PLACE)
#define FULL_CTIME_CENTIMINUTES (FULL_CTIME_FORMAT_HH_MM | FULL_CTIME_2_PLACES)
#define FULL_CTIME_MILLIMINUTES (FULL_CTIME_FORMAT_HH_MM | FULL_CTIME_3_PLACES)
#define FULL_CTIME_MICROMINUTES (FULL_CTIME_FORMAT_HH_MM | FULL_CTIME_6_PLACES)
#define FULL_CTIME_DECIHOURS (FULL_CTIME_FORMAT_HH | FULL_CTIME_1_PLACE)
#define FULL_CTIME_CENTIHOURS (FULL_CTIME_FORMAT_HH | FULL_CTIME_2_PLACES)
#define FULL_CTIME_MILLIHOURS (FULL_CTIME_FORMAT_HH | FULL_CTIME_3_PLACES)
#define FULL_CTIME_MICROHOURS (FULL_CTIME_FORMAT_HH | FULL_CTIME_6_PLACES)
#define FULL_CTIME_DECIDAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_1_PLACE)
#define FULL_CTIME_CENTIDAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_2_PLACES)
#define FULL_CTIME_MILLIDAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_3_PLACES)
#define FULL_CTIME_MICRODAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_6_PLACES)
#define FULL_CTIME_NANODAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_9_PLACES)
#define FULL_CTIME_PICODAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_12_PLACES)
#define FULL_CTIME_FEMTODAYS (FULL_CTIME_FORMAT_DAY | FULL_CTIME_15_PLACES)
/* The calendar is stored in the lowest four bits (nibble), allowing
for 16 possible calendars; only 9 are currently assigned, but there
are plenty of candidates for the remaining seven: */
#define CALENDAR_MASK 0xf
#define CALENDAR_GREGORIAN 0
#define CALENDAR_JULIAN 1
#define CALENDAR_HEBREW 2
#define CALENDAR_ISLAMIC 3
#define CALENDAR_REVOLUTIONARY 4
#define CALENDAR_PERSIAN 5
#define CALENDAR_CHINESE 7
#define CALENDAR_MODERN_PERSIAN 8
/* The "Julian/Gregorian" calendar uses the Julian system before
mid-October 1582, and Gregorian after that. */
#define CALENDAR_JULIAN_GREGORIAN 6
/* The usual switchover date between the two calendars is JD 2299160.5, */
/* which corresponds to 15 Oct 1582 (Gregorian) = 5 Oct 1582 (Julian). */
/* That is to say, 4 October 1582 was followed by 15 October 1582; */
/* 5 October-14 October 1582 "never happened". */
/* October 1582 */
/* Su Mo Tu We Th Fr Sa */
/* 1 2 3 4 15 16 */
/* 17 18 19 20 21 22 23 */
/* 24 25 26 27 28 29 30 */
/* 31 */
#define GREGORIAN_SWITCHOVER_JD 2299160L
/* The Chinese calendar routines use a buffer of precomputed data */
/* indicating when various months occur, which are considered */
/* intercalary, etc. This function sets that buffer (see jd.cpp */
/* for an example of the use of both of the following functions): */
void DLL_FUNC set_chinese_calendar_data( void *cdata);
int DLL_FUNC get_chinese_intercalary_month( void);
#ifdef __cplusplus
}
#endif
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