time_utils.h File Reference

Time related utilities. More...

#include <time.h>
#include "sarmfsw.h"

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Data Structures
struct	DateTime
	Basic Date & Time struct. More...

Enumerations
enum	eMonths {   January = 1U , February , March , April ,   May , June , July , August ,   September , October , November , December ,   Months_Max }
	Months enumeration. More...
enum	eWeekdays {   Sunday = 0U , Monday , Tuesday , Wednesday ,   Thursday , Friday , Saturday , Weekdays_Max }
	Weekdays enumeration. More...

Functions
const char *	Get_Day_str (const eWeekdays day)
	Get weekday name string.
const char *	Get_Month_str (const eMonths month)
	Get month name string.
eWeekdays	Get_Weekday (const uint16_t year, const uint8_t month, const uint8_t day)
	Determine weekday for a given date.
bool	is_LeapYear (const uint32_t year)
	Determine if given year is leap.
DateTime	time_t2DateTime (const time_t time)
	Convert time_t to DateTime.
time_t	DateTime2time_t (const DateTime *const time)
	Convert DateTime to time_t.
DateTime	diffDateTime (const DateTime *const time2, const DateTime *const time1)
	Calculate DateTime difference.

Detailed Description

Time related utilities.

Author

SMFSW

Copyright

MIT (c) 2017-2026, SMFSW

Enumeration Type Documentation

eMonths

enum eMonths

Months enumeration.

Enumerator
January	January.
February	February.
March	March.
April	April.
May	May.
June	June.
July	July.
August	August.
September	September.
October	October.
November	November.
December	December.
Months_Max

eWeekdays

enum eWeekdays

Weekdays enumeration.

Enumerator
Sunday	Sunday.
Monday	Monday.
Tuesday	Tuesday.
Wednesday	Wednesday.
Thursday	Thursday.
Friday	Friday.
Saturday	Saturday.
Weekdays_Max

Function Documentation

DateTime2time_t()

time_t DateTime2time_t

(

const DateTime *const

time

)

Convert DateTime to time_t.

Parameters

[in]

time

- DateTime representation (broken down time)

Returns

time_t representation

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diffDateTime()

DateTime diffDateTime	(	const DateTime *const	time2,
		const DateTime *const	time1 )

Calculate DateTime difference.

Parameters

[in]	time2	- pointer to closest DateTime representation (broken down time)
[in]	time1	- pointer to oldest DateTime representation (broken down time)

Returns

DateTime difference

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Get_Day_str()

const char * Get_Day_str

(

const eWeekdays

day

)

Get weekday name string.

Parameters

[in]

day

- Weekday from eWeekdays enum

Returns

Weekday string pointer

Get_Month_str()

const char * Get_Month_str

(

const eMonths

month

)

Get month name string.

Parameters

[in]

month

- Month from eMonths enum

Returns

Month string pointer

Get_Weekday()

eWeekdays Get_Weekday	(	const uint16_t	year,
		const uint8_t	month,
		const uint8_t	day )

Determine weekday for a given date.

Note

The algorithm works for dates between 1700 and 2399

Warning

month and day starts at 1, and no check is done to ensure the date is valid. You might be caught in a weekday from a void time if the date is not valid! You've been warned!!!

Parameters

[in]	year	- Year of the given date
[in]	month	- Month of the given date (1 to 12)
[in]	day	- Day of the given date (1 to 31)

Returns

true if leap year / false otherwise

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is_LeapYear()

bool is_LeapYear ( const uint32_t year )

inline

Determine if given year is leap.

Parameters

[in]

year

- Year to test

Returns

true if leap year / false otherwise

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time_t2DateTime()

DateTime time_t2DateTime

(

const time_t

time

)

Convert time_t to DateTime.

Parameters

[in]

time

- time_t representation

Returns

Broken down time representation (DateTime)

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