library: libCore #include "TDatime.h"

# TDatime

class description - source file - inheritance tree (.pdf)

## class TDatime

| Inheritance Chart:

`TDatime`

        public:

                          TDatime()
                          TDatime(const TDatime& d)
                          TDatime(UInt_t tloc, Bool_t dosDate = kFALSE)
                          TDatime(Int_t date, Int_t time)
                          TDatime(Int_t year, Int_t month, Int_t day, Int_t hour, Int_t min, Int_t sec)
                          TDatime(const char* sqlDateTime)
                  TDatime operator=(const TDatime& d)
                  virtual ~TDatime()
              const char* AsSQLString() const
              const char* AsString() const
              const char* AsString(char* out) const
           static TClass* Class()
                   UInt_t Convert(Bool_t toGMT = kFALSE) const
                     void Copy(TDatime& datime) const
                     void FillBuffer(char*& buffer)
                   UInt_t Get() const
                    Int_t GetDate() const
              static void GetDateTime(UInt_t datetime, Int_t& date, Int_t& time)
                    Int_t GetDay() const
                    Int_t GetHour() const
                    Int_t GetMinute() const
                    Int_t GetMonth() const
                    Int_t GetSecond() const
                    Int_t GetTime() const
                    Int_t GetYear() const
          virtual TClass* IsA() const
                     void Print(Option_t* option = "") const
                     void ReadBuffer(char*& buffer)
                     void Set()
                     void Set(UInt_t tloc, Bool_t dosDate = kFALSE)
                     void Set(Int_t date, Int_t time)
                     void Set(Int_t year, Int_t month, Int_t day, Int_t hour, Int_t min, Int_t sec)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
                    Int_t Sizeof() const
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

### Data Members

        protected:

          UInt_t fDatime  Date (relative to 1995) + time

## Class Description

     TDatime

     This class stores the date and time with a precision of one second
     in an unsigned 32 bit word. The date is stored with the origin being
     the 1st january 1995. See also class TStopwatch.

TDatime()

     Create a TDatime and set it to the current time.

TDatime(Int_t date, Int_t time)

     Create a TDatime and set it to the specified date and time.
     See Set(Int_t, Int_t) about the date, time format.

TDatime(Int_t year, Int_t month, Int_t day, Int_t hour, Int_t min, Int_t sec)

     Create a TDatime and set it to the specified year, month,
     day, time, hour, minute and second. See Set() about the format.

TDatime(const char *sqlDateTime)

     Expects as input a string in SQL date/time compatible format, like:
     yyyy-mm-dd hh:mm:ss.

const char* AsString() const

     Return the date & time as a string (ctime() format).
     Copy result because it points to a statically allocated string.

const char* AsString(char *out) const

     Return the date & time as a string (ctime() format).
     Result is copied into out (and out is returned). Make sure
     out can at least contain 26 characters. Thread safe.

const char* AsSQLString() const

     Return the date & time in SQL compatible string format, like:
     1997-01-15 20:16:28. The returned string buffer is static and
     will be reused.

UInt_t Convert(Bool_t toGMT) const

     Convert fDatime from TDatime format to the standard time_t format.
     If toGMT is true the returned time_t is converted to GMT.

void Copy(TDatime &datime) const

     Copy this to datime.

void FillBuffer(char *&buffer)

     Encode Date/Time into buffer, used by I/O system.

Int_t GetDate() const

     Return date in form of 19971224 (i.e. 24/12/1997)

Int_t GetTime() const

     Return time in form of 123623 (i.e. 12:36:23)

void Print(Option_t *) const

     Print date and time.

void ReadBuffer(char *&buffer)

     Decode Date/Time from output buffer, used by I/O system.

void Set()

     Set Date/Time to current time as reported by the system.
     Date and Time are encoded into one single unsigned 32 bit word.
     Date is stored with the origin being the 1st january 1995.
     Time has 1 second precision.

void Set(UInt_t tloc, Bool_t dosDate)

     The input arg is a time_t value returned by time() or a value
     returned by Convert(). This value is the number of seconds since
     the EPOCH (i.e. 00:00:00 on Jan 1m 1970). If dosDate is true then
     the input is a dosDate value.

void Set(Int_t date, Int_t time)

     Set date and time. Data must be in format 980418 or 19980418 and time in
     224512 (second precision). The date must
     be >= 950101.
     For years >= 2000, date can be given in the form 20001127 or 1001127
     internally the date will be converted to 1001127

void Set(Int_t year, Int_t month, Int_t day, Int_t hour, Int_t min, Int_t sec)

     Set date and time. Year may be xx where 95 <= xx <= 199 (199 being 2099).
     The year must be >= 1995.

void Streamer(TBuffer &b)

     Stream a object of type TDatime.

void GetDateTime(UInt_t datetime, Int_t &date, Int_t &time)

     Static function that returns the date and time. The input is
     in TDatime format (as obtained via TDatime::Get()).
     Date is returned in the format 950223  February 23 1995.
     Time is returned in the format 102459 10h 24m 59s.

### Inline Functions

                   void ~TDatime()
                TDatime TDatime(Int_t year, Int_t month, Int_t day, Int_t hour, Int_t min, Int_t sec)
                TDatime TDatime(const char* sqlDateTime)
                TDatime operator=(const TDatime& d)
                 UInt_t Get() const
                  Int_t GetYear() const
                  Int_t GetMonth() const
                  Int_t GetDay() const
                  Int_t GetHour() const
                  Int_t GetMinute() const
                  Int_t GetSecond() const
                  Int_t Sizeof() const
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void StreamerNVirtual(TBuffer& b)

Author: Rene Brun 05/01/95
Last update: root/base:$Name: $:$Id: TDatime.cxx,v 1.11 2005/06/23 13:33:47 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *