#ifndef __PTIME_H__ 
#define __PTIME_H__ 

#ifndef __PPORT_H__ 
#include "pport.h" 
#endif 

#ifndef __PTYPES_H__ 
#include "ptypes.h" 
#endif 


#include <time.h> 


PTYPES_BEGIN

// datetime type: 64-bit, number of milliseconds since midnight 01/01/0001
typedef large datetime;

#define invdatetime LLCONST(-1) 

#define _msecsmax 86400000                    // number of milliseconds in one day 
#define _daysmax  3652059                     // number of days between 01/01/0001 and 12/31/9999 
#define _datetimemax LLCONST(315537897600000) // max. allowed number for datetime type 
#define _unixepoch LLCONST(62135596800000)    // difference between time_t and datetime in milliseconds 


// datetime general utilities
inline int days(datetime d)            { return int(d / _msecsmax); }
inline int msecs(datetime d)           { return int(d % _msecsmax); }

datetime mkdt(int days, int msecs);
bool     isvalid(datetime);
datetime now(bool utc = true);
void     tzupdate();
int      tzoffset();
string   dttostring(datetime, const char* fmt);
string   nowstring(const char* fmt, bool utc = true);
datetime utodatetime(time_t u);
struct tm* dttotm(datetime dt, struct tm& t);

// date/calendar manipulation
bool     isleapyear(int year);
int      daysinmonth(int year, int month);
int      daysinyear(int year, int month);
int      dayofweek(datetime);
bool     isdatevalid(int year, int month, int day);
datetime encodedate(int year, int month, int day);
bool     decodedate(datetime, int& year, int& month, int& day);

// time manipulation
bool     istimevalid(int hour, int min, int sec, int msec = 0);
datetime encodetime(int hour, int min, int sec, int msec = 0);
bool     decodetime(datetime, int& hour, int& min, int& sec, int& msec);
bool     decodetime(datetime, int& hour, int& min, int& sec);


PTYPES_END

#endif // __PTIME_H__