tm.h
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2014 René Kijewski
3  *
4  * This file is subject to the terms and conditions of the GNU Lesser
5  * General Public License v2.1. See the file LICENSE in the top level
6  * directory for more details.
7  */
8 
9 #pragma once
10 
19 #include <time.h>
20 #include <sys/time.h>
21 #include <stdint.h>
22 
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26 
27 #define TM_WDAY_SUN (0)
28 #define TM_WDAY_MON (1)
29 #define TM_WDAY_TUE (2)
30 #define TM_WDAY_WED (3)
31 #define TM_WDAY_THU (4)
32 #define TM_WDAY_FRI (5)
33 #define TM_WDAY_SAT (6)
35 #define TM_MON_JAN ( 0)
36 #define TM_MON_FEB ( 1)
37 #define TM_MON_MAR ( 2)
38 #define TM_MON_APR ( 3)
39 #define TM_MON_MAY ( 4)
40 #define TM_MON_JUN ( 5)
41 #define TM_MON_JUL ( 6)
42 #define TM_MON_AUG ( 7)
43 #define TM_MON_SEP ( 8)
44 #define TM_MON_OCT ( 9)
45 #define TM_MON_NOV (10)
46 #define TM_MON_DEC (11)
52 extern const int8_t TM_MON_DAYS[12];
53 
58 extern const int16_t TM_MON_DAYS_ACCU[12];
59 
65 int tm_is_leap_year(unsigned year);
66 
73 int tm_doomsday(int year);
74 
84 #ifndef ATMEGA_INCOMPATIBLE_TIME_H
85 void tm_get_wyday(int year, int mon, int mday, int *wday, int *yday);
86 #else
87 void tm_get_wyday(int year, int mon, int mday, int8_t *wday, int16_t *yday);
88 #endif
89 
97 void tm_fill_derived_values(struct tm *tm);
98 
107 int tm_is_valid_date(int year, int mon, int mday);
108 
117 int tm_is_valid_time(int hour, int min, int sec);
118 
119 #ifdef __cplusplus
120 }
121 #endif
122 
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.