"

 COPYRIGHT (c) 1995 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libbasic' }"

Magnitude subclass:#AbstractTime

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Magnitude-General'

!

!AbstractTime class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1995 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    This is an abstract class providing common protocol for Time (time in day)

    and AbsoluteTime (time plus day).

    There are no instances of this class in the system.

    It is meant as a home for methods common to time handling classes.

    [author:]

        Claus Gittinger

    [See also:]

        Time Date AbsoluteTime

        Delay ProcessorScheduler

"

! !

!AbstractTime class methodsFor:'instance creation'!

dateAndTimeNow

    "return an array filled with the current date and time.

     See also: Date today / Time now / AbsoluteTime now."

    ^ Array with:(Date today) with:(Time now)

    "

     Time dateAndTimeNow

    "

    "Modified: 19.4.1996 / 15:23:37 / cg"

!

now

    "return an instance of myself representing this moment."

    ^ self basicNew fromOSTime:(OperatingSystem getOSTime)

    "

     AbsoluteTime now   

     Time now   

    "

    "Modified: 1.7.1996 / 15:20:10 / cg"

! !

!AbstractTime class methodsFor:'Compatibility - VW'!

totalSeconds

    "returns an internal second clock. Dont interpret the returned

     value - if at all, use it to compute time deltas, by subtracting

     returned values."

    ^ self secondClock

! !

!AbstractTime class methodsFor:'private instance creation'!

fromOSTime:osTime

    "return a time, representing the time given by the operatingSystem time.

     Not meant for public use."

    ^ self basicNew fromOSTime:osTime.

    "Modified: 1.7.1996 / 15:09:54 / cg"

!

fromSeconds:seconds

    "return an instance that is constructed from seconds.

     This method is only allowed for second values as returned by

     getSeconds, possibly adding/subtracting to that. 

     Never depend on any specific interpretation of the seconds,

     since it depends on how the OperatingSystem counts time

     (some start at 1900, others with 1970 ...)"

   ^ self basicNew setSeconds:seconds

    "

     Time fromSeconds:0             should return midnight

     AbsoluteTime fromSeconds:0     on UNIX: returns 1st. Jan 1970

                                    on others: dont know

     (AbsoluteTime day:1 month:1 year:1970 hour:1 minutes:0 seconds:0)

        getSeconds                  on UNIX: returns 0

                                    on others: dont know

    "

    "Modified: 1.7.1996 / 13:39:30 / cg"

! !

!AbstractTime class methodsFor:'queries'!

millisecondClockValue

    "return the millisecond clock - since this one overruns

     regularly, use the value only for short timing deltas.

     Also remember that it wraps when comparing these values."

    ^ OperatingSystem getMillisecondTime.

    "

     Time millisecondClockValue 

    "

!

secondClock

    "return seconds of now - for GNU-ST compatibility"

    ^ OperatingSystem getOSTime // 1000

    "

     AbstractTime secondClock    

    "

    "Modified: 1.7.1996 / 15:20:14 / cg"

! !

!AbstractTime class methodsFor:'timing evaluations'!

millisecondsToRun:aBlock

    "evaluate the argument, aBlock; return the number of milliseconds it took"

    |startTime endTime|

    startTime := OperatingSystem getMillisecondTime.

    aBlock value.

    endTime := OperatingSystem getMillisecondTime.

    ^ endTime - startTime

    "

     Time millisecondsToRun:[100 factorial]  

    "

    "Modified: 17.6.1996 / 16:57:37 / cg"

!

secondsToRun:aBlock

    "evaluate the argument, aBlock; return the number of seconds it took"

    |startTime endTime|

    startTime := self secondClock.

    aBlock value.

    endTime := self secondClock.

    ^ endTime - startTime

    "

     Time secondsToRun:[1000 factorial]  

    "

! !

!AbstractTime methodsFor:'accessing'!

hourInDay

    "return the hours (0..23)"

    ^ self hours

    "

     AbsoluteTime now hourInDay 

     Time now hourInDay 

    "

!

minuteInDay

    "return the minutes (0..59)"

    ^ self minutes.

    "

     AbsoluteTime now minuteInDay 

     Time now minuteInDay 

    "

!

secondInDay

    "return the seconds (0..59)"

    ^ self seconds

    "

     AbsoluteTime now secondInDay 

     Time now seconds 

    "

    "Created: 22.10.1996 / 09:27:47 / stefan"

!

timeZoneName

    ^ 'utc'

!

weekInYear

    "return the week number of the receiver - 1 for Jan, 1st."

    ^ Date weekInYearOf:self

    "

     (AbsoluteTime newDay:1 year:2000) weekInYear    

     (AbsoluteTime newDay:2 year:2000) weekInYear    

     (AbsoluteTime newDay:3 year:2000) weekInYear    

    "

! !

!AbstractTime methodsFor:'arithmetic'!

- aTime

    "return the delta in seconds between 2 times."

    ^ self getSeconds - (aTime getSeconds)

    "

     |t1 t2|

     t1 := AbsoluteTime now.

     (Delay forSeconds:5) wait.

     t2 := AbsoluteTime now.

     Transcript showCR:('seconds passed: ' , (t2 - t1) printString).

    "

!

addHours:numberOfHours

    "return a new instance of myself, numberOfHours afterwards."

    ^ self addSeconds:(numberOfHours * (60 * 60))

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t addHours:12).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t addHours:12).

    "

!

addMilliseconds:numberOfMilliSeconds

    "return a new instance of myself, numberOfMilliSeconds afterwards."

    ^ self species basicNew 

        setMilliseconds:(self getMilliseconds + numberOfMilliSeconds)

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t addMilliseconds:100).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t addMilliseconds:1000).

    "

!

addMinutes:numberOfMinutes

    "return a new instance of myself, numberOfMinutes afterwards."

    ^ self addSeconds:(numberOfMinutes * 60)

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t addMinutes:60).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t addMinutes:60).

    "

!

addSeconds:numberOfSeconds

    "return a new instance of myself, numberOfSeconds afterwards."

    ^ self species basicNew 

        setMilliseconds:(self getMilliseconds + (numberOfSeconds * 1000))

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t addSeconds:60).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t addSeconds:60).

    "

!

addTime:timeAmount

    "return a new instance of myself, timeAmount seconds afterwards.

     Provided for ST-80 compatibility.

     WARNING:

        AddTime is a bad name - it does not add a time, but expects

        a numberOfSeconds as argument. 

        Use any of addSeconds/addHours etc. to make things clear"

    ^ self addSeconds:timeAmount

!

subtractHours:numberOfHours

    "return a new instance of myself, numberOfHours before."

    ^ self subtractSeconds:(numberOfHours * (60 * 60))

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t subtractHours:12).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t subtractHours:12).

    "

!

subtractMilliseconds:numberOfMilliSeconds

    "return a new instance of myself, numberOfMilliSeconds before."

    ^ self species basicNew 

        setMilliseconds:(self getMilliseconds - numberOfMilliSeconds)

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t subtractMilliseconds:100).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t subtractMilliseconds:1000).

    "

!

subtractMinutes:numberOfMinutes

    "return a new instance of myself, numberOfMinutes before."

    ^ self subtractSeconds:(numberOfMinutes * 60)

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t subtractMinutes:60).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t subtractMinutes:60).

    "

!

subtractSeconds:numberOfSeconds

    "return a new instance of myself, numberOfSeconds before."

    ^ self species basicNew 

        setMilliseconds:(self getMilliseconds - (numberOfSeconds * 1000))

    "

     |t|

     t := AbsoluteTime now.

     Transcript showCR:t.

     Transcript showCR:(t subtractSeconds:60).

    "

    "

     |t|

     t := Time now.

     Transcript showCR:t.

     Transcript showCR:(t subtractSeconds:60).

    "

!

subtractTime:timeAmount

    "return a new instance of myself, timeAmount seconds before myself.

     Provided for ST-80 compatibility.

     WARNING:

        SubtractTime is a bad name - it does not add a time, but expects

        a numberOfSeconds as argument. 

        Use any of addSeconds/addHours etc. to make things clear"

    ^ self subtractSeconds:timeAmount

! !

!AbstractTime methodsFor:'comparing'!

< aTime

    "return true if the receiver is before the argument"