Utility library for struct tm. More...

Detailed Description

Utility library for struct tm.

Definition in file tm.h.

#include <time.h>
#include <stdint.h>

Include dependency graph for tm.h:

Macros
#define	TM_WDAY_SUN (0)
	Sunday in `struct tm::tm_wday`.

#define	TM_WDAY_MON (1)
	Monday in `struct tm::tm_wday`.

#define	TM_WDAY_TUE (2)
	Tuesday in `struct tm::tm_wday`.

#define	TM_WDAY_WED (3)
	Wednesday in `struct tm::tm_wday`.

#define	TM_WDAY_THU (4)
	Thursday in `struct tm::tm_wday`.

#define	TM_WDAY_FRI (5)
	Friday in `struct tm::tm_wday`.

#define	TM_WDAY_SAT (6)
	Saturday in `struct tm::tm_wday`.

#define	TM_MON_JAN ( 0)
	January in `struct tm::tm_mon`

#define	TM_MON_FEB ( 1)
	February in `struct tm::tm_mon`

#define	TM_MON_MAR ( 2)
	March in `struct tm::tm_mon`

#define	TM_MON_APR ( 3)
	April in `struct tm::tm_mon`

#define	TM_MON_MAY ( 4)
	May in `struct tm::tm_mon`

#define	TM_MON_JUN ( 5)
	June in `struct tm::tm_mon`

#define	TM_MON_JUL ( 6)
	July in `struct tm::tm_mon`

#define	TM_MON_AUG ( 7)
	August in `struct tm::tm_mon`

#define	TM_MON_SEP ( 8)
	September in `struct tm::tm_mon`

#define	TM_MON_OCT ( 9)
	October in `struct tm::tm_mon`

#define	TM_MON_NOV (10)
	November in `struct tm::tm_mon`

#define	TM_MON_DEC (11)
	December in `struct tm::tm_mon`

Functions
int	tm_is_leap_year (unsigned year)
	Tells if a given year is a leap year in the Gregorian calendar.

int	tm_doomsday (int year)
	Returns the congruent weekday of the Doomsday (March 0).

void	tm_get_wyday (int year, int mon, int mday, int wday, int yday)
	Calculates the day of the year and the weekday of a given date.

void	tm_fill_derived_values (struct tm *tm)
	Fills in `struct tm::tm_wday` and `struct tm::tm_yday` given a date.

int	tm_is_valid_date (int year, int mon, int mday)
	Tests if a date is valid.

int	tm_is_valid_time (int hour, int min, int sec)
	Shallow test if a time is valid.

Variables
const int8_t	TM_MON_DAYS [12]
	The number of days in common years.

const int16_t	TM_MON_DAYS_ACCU [12]
	The prefixsum of the number of days in common years.

Macros