mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-03 08:22:44 +00:00
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
* ntp_calendar.h - definitions for the calendar time-of-day routine
|
|
*/
|
|
|
|
#include "ntp_types.h"
|
|
|
|
struct calendar {
|
|
u_short year; /* year (A.D.) */
|
|
u_short yearday; /* day of year, 1 = January 1 */
|
|
u_char month; /* month, 1 = January */
|
|
u_char monthday; /* day of month */
|
|
u_char hour; /* hour of day, midnight = 0 */
|
|
u_char minute; /* minute of hour */
|
|
u_char second; /* second of minute */
|
|
};
|
|
|
|
/*
|
|
* Days in each month. 30 days hath September...
|
|
*/
|
|
#define JAN 31
|
|
#define FEB 28
|
|
#define FEBLEAP 29
|
|
#define MAR 31
|
|
#define APR 30
|
|
#define MAY 31
|
|
#define JUN 30
|
|
#define JUL 31
|
|
#define AUG 31
|
|
#define SEP 30
|
|
#define OCT 31
|
|
#define NOV 30
|
|
#define DEC 31
|
|
|
|
/*
|
|
* We deal in a 4 year cycle starting at March 1, 1900. We assume
|
|
* we will only want to deal with dates since then, and not to exceed
|
|
* the rollover day in 2036.
|
|
*/
|
|
#define SECSPERMIN (60) /* seconds per minute */
|
|
#define MINSPERHR (60) /* minutes per hour */
|
|
#define HRSPERDAY (24) /* hours per day */
|
|
#define DAYSPERYEAR (365) /* days per year */
|
|
|
|
#define SECSPERDAY (SECSPERMIN*MINSPERHR*HRSPERDAY)
|
|
#define SECSPERYEAR (365 * SECSPERDAY) /* regular year */
|
|
#define SECSPERLEAPYEAR (366 * SECSPERDAY) /* leap year */
|
|
|
|
#define MAR1900 ((JAN+FEB) * SECSPERDAY) /* no leap year in 1900 */
|
|
#define DAYSPERCYCLE (365+365+365+366) /* 3 normal years plus leap */
|
|
#define SECSPERCYCLE (DAYSPERCYCLE*SECSPERDAY)
|
|
#define YEARSPERCYCLE 4
|
|
|
|
/*
|
|
* Gross hacks. I have illicit knowlege that there won't be overflows
|
|
* here, the compiler often can't tell this.
|
|
*/
|
|
#define TIMES60(val) ((((val)<<4) - (val))<<2) /* *(16 - 1) * 4 */
|
|
#define TIMES24(val) (((val)<<4) + ((val)<<3)) /* *16 + *8 */
|
|
#define TIMES7(val) (((val)<<3) - (val)) /* *8 - *1 */
|
|
#define TIMESDPERC(val) (((val)<<10) + ((val)<<8) \
|
|
+ ((val)<<7) + ((val)<<5) \
|
|
+ ((val)<<4) + ((val)<<2) + (val)) /* *big* hack */
|
|
|
|
/*
|
|
* Another big hack. Cycle 22 started on March 1, 1988. This is
|
|
* STARTCYCLE22 seconds after the start of cycle 0.
|
|
*/
|
|
#define CYCLE22 (22)
|
|
#define STARTCYCLE22 (u_long)(0xa586b500) /* 2777068800 */
|
|
#define MAR1988 (u_long)(STARTCYCLE22 + (u_long)MAR1900)
|
|
|
|
/*
|
|
* The length of January + February in leap and non-leap years.
|
|
*/
|
|
#define JANFEBNOLEAP ((JAN+FEB) * SECSPERDAY)
|
|
#define JANFEBLEAP ((JAN+FEBLEAP) * SECSPERDAY)
|
|
|
|
extern void caljulian P((u_long, struct calendar *));
|
|
extern u_long caltontp P((const struct calendar *));
|
|
|