datetime.c File Reference

#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "datetime.h"

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Macros
#define	_CRT_SECURE_NO_DEPRECATE
#define	UCHAR(x)   (((x) >= 'a' && (x) <= 'z') ? ((x)&~32) : (x))

Functions
void	divMod (int n, int d, int *result, int *remainder)
int	isLeapYear (int year)
int	datetime_findMonth (char *month)
	Finds the month of the year for a date.
DateTime	datetime_encodeDate (int year, int month, int day)
	Encodes a date values from year, month, and day to a DateTime value.
DateTime	datetime_encodeTime (int hour, int minute, int second)
	Encodes a time value from hour, minute, and second to a DateTime value.
void	datetime_decodeDate (DateTime date, int *year, int *month, int *day)
	Decodes a DateTime value to year, month, and day.
void	datetime_decodeTime (DateTime time, int *h, int *m, int *s)
	Decodes a DateTime value to hour, minute, and second.
void	datetime_dateToStr (DateTime date, char *s)
	Converts a DateTime value to a string.
void	datetime_timeToStr (DateTime time, char *s)
	Converts a DateTime value to a string.
int	datetime_strToDate (char *s, DateTime *d)
	Converts a string to a DateTime value.
int	datetime_strToTime (char *s, DateTime *t)
	Converts a string to a DateTime value.
void	datetime_setDateFormat (int fmt)
	Sets the date format.
DateTime	datetime_addSeconds (DateTime date1, double seconds)
	Adds seconds to a DateTime value.
DateTime	datetime_addDays (DateTime date1, DateTime date2)
	Adds days to a DateTime value.
long	datetime_timeDiff (DateTime date1, DateTime date2)
	Finds the difference in seconds between two DateTime values.
int	datetime_monthOfYear (DateTime date)
	Finds the month of the year for a date.
int	datetime_dayOfYear (DateTime date)
	Finds the day of the year for a date.
int	datetime_dayOfWeek (DateTime date)
	Finds the day of the week for a date.
int	datetime_hourOfDay (DateTime date)
	Finds the hour of the day for a time.
int	datetime_daysPerMonth (int year, int month)
	Finds the number of days in a month.
void	datetime_getTimeStamp (int fmt, DateTime aDate, int stampSize, char *timeStamp)
	Converts a DateTime value to a string.

Macro Definition Documentation

_CRT_SECURE_NO_DEPRECATE

#define _CRT_SECURE_NO_DEPRECATE

UCHAR

#define UCHAR

(

x

)

(((x) >= 'a' && (x) <= 'z') ? ((x)&~32) : (x))

Function Documentation

datetime_addDays()

DateTime datetime_addDays	(	DateTime	date1,
		DateTime	date2
	)

Adds days to a DateTime value.

Parameters

[in]	date1	Date value
[in]	days	Number of days to add

Returns

New DateTime value

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datetime_addSeconds()

DateTime datetime_addSeconds	(	DateTime	date1,
		double	seconds
	)

Adds seconds to a DateTime value.

Parameters

[in]	date1	Date value
[in]	seconds	Number of seconds to add

Returns

New DateTime value

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datetime_dateToStr()

void datetime_dateToStr	(	DateTime	date,
		char *	s
	)

Converts a DateTime value to a string.

Parameters

[in]	date	Date value
[out]	s	String to store the date

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datetime_dayOfWeek()

int datetime_dayOfWeek

(

DateTime

date

)

Finds the day of the week for a date.

Parameters

[in]

date

Date value

Returns

Day of week (0 = Sunday, 1 = Monday, ..., 6 = Saturday)

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datetime_dayOfYear()

int datetime_dayOfYear

(

DateTime

date

)

Finds the day of the year for a date.

Parameters

[in]

date

Date value

Returns

Day of year

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datetime_daysPerMonth()

int datetime_daysPerMonth	(	int	year,
		int	month
	)

Finds the number of days in a month.

Parameters

[in]	year	Year
[in]	month	Month

Returns

Number of days in the month

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datetime_decodeDate()

void datetime_decodeDate	(	DateTime	date,
		int *	y,
		int *	m,
		int *	d
	)

Decodes a DateTime value to year, month, and day.

Parameters

[in]	date	Date value
[out]	y	Year
[out]	m	Month
[out]	d	Day

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datetime_decodeTime()

void datetime_decodeTime	(	DateTime	time,
		int *	h,
		int *	m,
		int *	s
	)

Decodes a DateTime value to hour, minute, and second.

Parameters

[in]	time	Time value
[out]	h	Hour
[out]	m	Minute
[out]	s	Second

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datetime_encodeDate()

DateTime datetime_encodeDate	(	int	year,
		int	month,
		int	day
	)

Encodes a date values from year, month, and day to a DateTime value.

Parameters

[in]	year	Year
[in]	month	Month
[in]	day	Day

Returns

DateTime value

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datetime_encodeTime()

DateTime datetime_encodeTime	(	int	hour,
		int	minute,
		int	second
	)

Encodes a time value from hour, minute, and second to a DateTime value.

Parameters

[in]	hour	Hour
[in]	minute	Minute
[in]	second	Second

Returns

DateTime value

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datetime_findMonth()

int datetime_findMonth

(

char *

s

)

Finds the month of the year for a date.

Parameters

[in]

s

String date

Returns

Month of year

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datetime_getTimeStamp()

void datetime_getTimeStamp	(	int	fmt,
		DateTime	aDate,
		int	stampSize,
		char *	timeStamp
	)

Converts a DateTime value to a string.

Parameters

[in]	date	Date value
[in]	time	Time value
[out]	s	String to store the date and time

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datetime_hourOfDay()

int datetime_hourOfDay

(

DateTime

date

)

Finds the hour of the day for a time.

Parameters

[in]

time

Time value

Returns

Hour of day

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datetime_monthOfYear()

int datetime_monthOfYear

(

DateTime

date

)

Finds the month of the year for a date.

Parameters

[in]

date

Date value

Returns

Month of year

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datetime_setDateFormat()

void datetime_setDateFormat

(

int

fmt

)

Sets the date format.

Parameters

[in]

fmt

Date format

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datetime_strToDate()

int datetime_strToDate	(	char *	s,
		DateTime *	d
	)

Converts a string to a DateTime value.

Parameters

[in]	s	String date
[out]	d	DateTime value

Returns

1 if successful, 0 if not

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datetime_strToTime()

int datetime_strToTime	(	char *	s,
		DateTime *	t
	)

Converts a string to a DateTime value.

Parameters

[in]	s	String time
[out]	t	DateTime value

Returns

1 if successful, 0 if not

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datetime_timeDiff()

long datetime_timeDiff	(	DateTime	date1,
		DateTime	date2
	)

Finds the difference in seconds between two DateTime values.

Parameters

[in]	date1	First date value
[in]	date2	Second date value

Returns

Number of seconds

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datetime_timeToStr()

void datetime_timeToStr	(	DateTime	time,
		char *	s
	)

Converts a DateTime value to a string.

Parameters

[in]	time	Time value
[out]	s	String to store the time

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divMod()

void divMod	(	int	n,
		int	d,
		int *	result,
		int *	remainder
	)

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isLeapYear()

int isLeapYear

(

int

year

)

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