datetime.h

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#ifndef DATETIME_H
#define DATETIME_H

typedef double DateTime;

#define Y_M_D 0

#define M_D_Y 1

#define D_M_Y 2

#define NO_DATE -693594 // 1/1/0001

#define DATE_STR_SIZE 12

#define TIME_STR_SIZE 9

#define TIME_STAMP_SIZE 21

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

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

void datetime_decodeDate(DateTime date, int* year, int* month, int* day);

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

int datetime_monthOfYear(DateTime date);

int datetime_dayOfYear(DateTime date);

int datetime_dayOfWeek(DateTime date);

int datetime_hourOfDay(DateTime date);

int datetime_daysPerMonth(int year, int month);

void datetime_dateToStr(DateTime date, char* s);

void datetime_timeToStr(DateTime time, char* s);

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

int datetime_findMonth(char* month);

int datetime_strToDate(char* s, DateTime* d);

int datetime_strToTime(char* s, DateTime* t);

void datetime_setDateFormat(int fmt);

DateTime datetime_addSeconds(DateTime date1, double seconds);

DateTime datetime_addDays(DateTime date1, DateTime date2);

long datetime_timeDiff(DateTime date1, DateTime date2);
 
#endif //DATETIME_H