tm_8h_source.html

/*

 * SPDX-FileCopyrightText: 2014 René Kijewski

 * SPDX-License-Identifier: LGPL-2.1-only

 */


#pragma once


#include <time.h>

#include <sys/time.h>

#include <stdint.h>


#ifdef __cplusplus

extern "C" {

#endif


#define TM_WDAY_SUN (0)

#define TM_WDAY_MON (1)

#define TM_WDAY_TUE (2)

#define TM_WDAY_WED (3)

#define TM_WDAY_THU (4)

#define TM_WDAY_FRI (5)

#define TM_WDAY_SAT (6)


#define TM_MON_JAN ( 0)

#define TM_MON_FEB ( 1)

#define TM_MON_MAR ( 2)

#define TM_MON_APR ( 3)

#define TM_MON_MAY ( 4)

#define TM_MON_JUN ( 5)

#define TM_MON_JUL ( 6)

#define TM_MON_AUG ( 7)

#define TM_MON_SEP ( 8)

#define TM_MON_OCT ( 9)

#define TM_MON_NOV (10)

#define TM_MON_DEC (11)


extern const int8_t TM_MON_DAYS[12];


extern const int16_t TM_MON_DAYS_ACCU[12];


int tm_is_leap_year(unsigned year);


int tm_doomsday(int year);


#ifndef ATMEGA_INCOMPATIBLE_TIME_H

void tm_get_wyday(int year, int mon, int mday, int *wday, int *yday);

#else

void tm_get_wyday(int year, int mon, int mday, int8_t *wday, int16_t *yday);

#endif


void tm_fill_derived_values(struct tm *tm);


int tm_is_valid_date(int year, int mon, int mday);


int tm_is_valid_time(int hour, int min, int sec);


#ifdef __cplusplus

}

#endif


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

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

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

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

tm_get_wyday
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.

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

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

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