CWE-ou-minkata/Sources/Plasma/PubUtilLib/plUnifiedTime/plUnifiedTime.h

/*==LICENSE==*

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*==LICENSE==*/

#ifndef _PL_UNIFIEDTIME_INC_
#define _PL_UNIFIEDTIME_INC_

#include "HeadSpin.h"
#include <string>

#if HS_BUILD_FOR_WIN32
    typedef struct _FILETIME FILETIME;
#endif

//
// Plasma Unified System Time & Data Class
// the time and date are in secs and micros from
// Jan 1, 1970 00:00:00
//

struct timeval;
class hsStream;

enum plUnifiedTime_CtorNow { kNow };


class plUnifiedTime //
{
public:
    enum Mode
    {
        kGmt,
        kLocal
    };

protected:
    time_t  fSecs;
    uint32_t  fMicros;
    Mode    fMode;

    static int32_t    fLocalTimeZoneOffset;

    struct tm * IGetTime(const time_t * timer) const;

    static int32_t    IGetLocalTimeZoneOffset( void );

public:
    plUnifiedTime() : fSecs(0),fMicros(0), fMode(kGmt) { }      // set ToEpoch() at start
    plUnifiedTime(double secsDouble) { SetSecsDouble(secsDouble); }
    plUnifiedTime(plUnifiedTime_CtorNow,int mode=kLocal);
    plUnifiedTime(const timeval & tv);
    plUnifiedTime(int mode, const struct tm & src);
    plUnifiedTime(time_t t);
    plUnifiedTime(unsigned long t);
    plUnifiedTime(int year, int month, int day, int hour, int min, int sec, unsigned long usec=0, int dst=-1);
    plUnifiedTime(int mode, const char * buf, const char * fmt);
    plUnifiedTime(const plUnifiedTime & src);
    plUnifiedTime(const plUnifiedTime * src);
    static plUnifiedTime GetCurrent(Mode mode=kGmt);

    // assignment
    const plUnifiedTime & operator=(const plUnifiedTime & src);
    const plUnifiedTime & operator=(const plUnifiedTime * src);
    const plUnifiedTime & operator=(const struct timeval & src);
    const plUnifiedTime & operator=(time_t src);
    const plUnifiedTime & operator=(unsigned long t);
    const plUnifiedTime & operator=(const struct tm & src);

    // getters
    time_t GetSecs() const { return fSecs; }
    uint32_t GetMicros() const { return fMicros; }
    double GetSecsDouble() const;  // get the secs and micros as a double floating point value
    bool GetTime(short &year, short &month, short &day, short &hour, short &minute, short &second) const;
    struct tm * GetTm(struct tm * ptm=nil) const;
    int GetYear() const;
    int GetMonth() const;
    int GetDay() const;
    int GetHour() const;
    int GetMinute() const;
    int GetSecond() const;
    int GetMillis() const;
    int GetDayOfWeek() const;
    int GetMode() const {return fMode;} // local or gmt.

    // setters
    void SetSecs(const time_t secs) { fSecs = secs; }
    void SetSecsDouble(double secs);
    void SetMicros(const uint32_t micros) { fMicros = micros; }
    bool SetTime(short year, short month, short day, short hour, short minute, short second, unsigned long usec=0, int dst=-1);
    bool SetGMTime(short year, short month, short day, short hour, short minute, short second, unsigned long usec=0);
    bool SetToUTC();
    void ToCurrentTime();
    void ToEpoch() { fSecs = 0; fMicros = 0;}
    void SetMode(Mode mode) { fMode=mode;}
#if HS_BUILD_FOR_WIN32
    bool SetFromWinFileTime(const FILETIME ft);
#endif
    
    // query
    bool AtEpoch() const { return fSecs == 0 && fMicros == 0;}

    void Read(hsStream* s);
    void Write(hsStream* s) const;

    // time math
    const plUnifiedTime & operator+=(const plUnifiedTime & rhs);
    const plUnifiedTime & operator-=(const plUnifiedTime & rhs);
    friend plUnifiedTime operator -(const plUnifiedTime & left, const plUnifiedTime & right);
    friend plUnifiedTime operator +(const plUnifiedTime & left, const plUnifiedTime & right);
    static double GetTimeDifference(const plUnifiedTime& timeA, const plUnifiedTime& timeB);        // handles negative

    // time compare
    bool operator==(const plUnifiedTime & rhs) const;
    bool operator!=(const plUnifiedTime & rhs) const;
    bool operator <(const plUnifiedTime & rhs) const;
    bool operator >(const plUnifiedTime & rhs) const;
    bool operator<=(const plUnifiedTime & rhs) const;
    bool operator>=(const plUnifiedTime & rhs) const;

    friend bool operator <(const plUnifiedTime & time, int secs);


    // casting
    operator time_t() const { return fSecs;}
    operator timeval() const;
    operator struct tm() const;

    // formatting (ala strftime)
    std::string Format(const char * fmt) const;

    // parsing
    bool FromString(const char * buf, const char * fmt);
    
    const char* Print() const;  // print as simple string
    const char* PrintWMillis() const;   // print as simple string w/ millis
/*
FromString: (from glibc's strptime() man page)
     Converts the character string pointed to by buf to values which are
     stored in the ``tm'' structure pointed to by tm, using the format
     specified by format.

     The following conversion specifications are supported:

     %%    A `%' is written. No argument is converted.
     %a    the day of week, using the locale's weekday names; either the ab-
           breviated or full name may be specified.
     %A    the same as %a.
     %b    the month, using the locale's month names; either the abbreviated
           or full name may be specified.
     %B    the same as %b.
     %c    the date and time, using the locale's date and time format.
     %C    the century number [0,99]; leading zeros are permitted but not re-
           quired.  This conversion should be used in conjunction with the %y
           conversion.
     %d    the day of month [1,31]; leading zeros are permitted but not re-
           quired.
     %D    the date as %m/%d/%y.
     %e    the same as %d.
     %h    the same as %b.
     %H    the hour (24-hour clock) [0,23]; leading zeros are permitted but
           not required.
     %I    the hour (12-hour clock) [1,12]; leading zeros are permitted but
           not required.
     %j    the day number of the year [1,366]; leading zeros are permitted but
           not required.
     %k    the same as %H.
     %l    the same as %I.
     %m    the month number [1,12]; leading zeros are permitted but not re-
           quired.
     %M    the minute [0,59]; leading zeros are permitted but not required.
     %n    any white-space, including none.
     %p    the locale's equivalent of a.m. or p.m..
     %r    the time (12-hour clock) with %p, using the locale's time format.
     %R    the time as %H:%M.
     %S    the seconds [0,61]; leading zeros are permitted but not required.
     %t    any white-space, including none.
     %T    the time as %H:%M:%S.
     %U    the week number of the year (Sunday as the first day of the week)
           as a decimal number [0,53]; leading zeros are permitted but not re-
           quired.  All days in a year preceding the first Sunday are consid-
           ered to be in week 0.
     %w    the weekday as a decimal number [0,6], with 0 representing Sunday;
           leading zeros are permitted but not required.
     %W    the week number of the year (Monday as the first day of the week)
           as a decimal number [0,53]; leading zeros are permitted but not re-
           quired.  All days in a year preceding the first Monday are consid-
           ered to be in week 0.
     %x    the date, using the locale's date format.
     %X    the time, using the locale's time format.
     %y    the year within the 20th century [69,99] or the 21st century
           [0,68]; leading zeros are permitted but not required.  If specified
           in conjunction with %C, specifies the year [0,99] within that cen-
           tury.
     %Y    the year, including the century (i.e., 1996).
*/
};


plUnifiedTime operator -(const plUnifiedTime & left, const plUnifiedTime & right);
plUnifiedTime operator +(const plUnifiedTime & left, const plUnifiedTime & right);

#endif //_PL_UNIFIEDTIME_INC_