/usr/share/gnu-smalltalk/kernel/Time.st is in gnu-smalltalk-common 3.2.5-1.1.
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|
| Time Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 1988,92,94,95,99,2000,2001,2002,2008,2009
| Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Magnitude subclass: Time [
| seconds |
<category: 'Language-Data types'>
<comment: 'My instances represent times of the day. I provide methods for instance
creation, methods that access components (hours, minutes, and seconds) of a
time value, and a block execution timing facility.'>
SecondClockAdjustment := nil.
ClockOnStartup := nil.
ClockOnImageSave := nil.
Time class >> utcSecondClock [
"Answer the number of seconds since the midnight of 1/1/1901 (unlike
#secondClock, the reference time is here expressed as UTC, that is
as Coordinated Universal Time)."
<category: 'basic (UTC)'>
^self secondClock - self timezoneBias
]
Time class >> utcNow [
"Answer a time representing the current time of day in Coordinated
Universal Time (UTC)"
<category: 'basic (UTC)'>
^self new setSeconds: self utcSecondClock
]
Time class >> midnight [
"Answer a time representing midnight in Coordinated
Universal Time (UTC)"
<category: 'basic (UTC)'>
^self new setSeconds: 0
]
Time class >> timezoneBias [
"Specifies the current bias, in seconds, for local time translation for
the current time. The bias is the difference, in seconds, between
Coordinated Universal Time (UTC) and local time; a positive bias
indicates that the local timezone is to the east of Greenwich (e.g.
Europe, Asia), while a negative bias indicates that it is to the
west (e.g. America)"
<category: 'builtins'>
<primitive: VMpr_Time_timezoneBias>
^self primitiveFailed
]
Time class >> timezoneBias: seconds [
"Specifies the bias, in seconds, for local time translation for
the given second clock value (0 being midnight of 1/1/1901).
The bias is the difference, in seconds, between Coordinated
Universal Time (UTC) and local time; a positive bias indicates
that the local timezone is to the east of Greenwich (e.g.
Europe, Asia), while a negative bias indicates that it is to
the west (e.g. America)"
<category: 'builtins'>
<primitive: VMpr_Time_timezoneBias>
^self primitiveFailed
]
Time class >> timezone [
"Answer a String associated with the current timezone (either standard
or daylight-saving) on this operating system. For example, the answer
could be `EST' to indicate Eastern Standard Time; the answer can be
empty and can't be assumed to be a three-character code such as `EST'."
<category: 'builtins'>
<primitive: VMpr_Time_timezone>
^self primitiveFailed
]
Time class >> secondClock [
"Answer the number of seconds since the midnight of 1/1/1901"
<category: 'clocks'>
^self primSecondClock + SecondClockAdjustment
]
Time class >> primSecondClock [
"Returns the number of seconds to/from 1/1/2000."
<category: 'builtins'>
<primitive: VMpr_Time_secondClock>
^self primitiveFailed
]
Time class >> nanosecondClock [
"Answer the number of nanoseconds since startup."
<category: 'clocks'>
^self primNanosecondClock - ClockOnStartup
]
Time class >> millisecondClock [
"Answer the number of milliseconds since startup."
<category: 'clocks'>
^self nanosecondClock // 1000000
]
Time class >> primNanosecondClock [
"Returns the number of milliseconds since midnight."
<category: 'builtins'>
<primitive: VMpr_Time_nanosecondClock>
^self primitiveFailed
]
Time class >> initialize [
"Initialize the Time class after the image has been bootstrapped"
"(99 * 365 + 25) * 86400 secs/day."
<category: 'initialization'>
SecondClockAdjustment := 86400 * 36159.
ClockOnImageSave := 0.
ObjectMemory addDependent: self
]
Time class >> update: aspect [
"Private - Initialize the receiver's instance variables"
<category: 'initialization'>
| time |
aspect == #returnFromSnapshot ifTrue: [
ClockOnStartup := Time primNanosecondClock - ClockOnImageSave].
aspect == #aboutToSnapshot ifTrue: [
ClockOnImageSave := Time nanosecondClock].
]
Time class >> now [
"Answer a time representing the current time of day"
"\\ rounds towards -infinity, so it is good for negative numbers too"
<category: 'instance creation'>
^self new setSeconds: self primSecondClock
]
Time class >> new [
"Answer a Time representing midnight"
<category: 'instance creation'>
^self basicNew setSeconds: 0
]
Time class >> fromSeconds: secondCount [
"Answer a Time representing secondCount seconds past midnight"
<category: 'instance creation'>
^self new setSeconds: secondCount
]
Time class >> hour: h [
"Answer a Time that is the given number of hours past midnight"
<category: 'instance creation'>
^self fromSeconds: h * 3600
]
Time class >> hour: h minute: m second: s [
"Answer a Time that is the given number of hours, minutes and
seconds past midnight"
<category: 'instance creation'>
^self fromSeconds: (h * 60 + m) * 60 + s
]
Time class >> minute: m [
"Answer a Time that is the given number of minutes past midnight"
<category: 'instance creation'>
^self fromSeconds: m * 60
]
Time class >> second: s [
"Answer a Time that is the given number of seconds past midnight"
<category: 'instance creation'>
^self fromSeconds: s
]
Time class >> hours: h [
"Answer a Time that is the given number of hours past midnight"
<category: 'instance creation'>
^self fromSeconds: h * 3600
]
Time class >> hours: h minutes: m seconds: s [
"Answer a Time that is the given number of hours, minutes and
seconds past midnight"
<category: 'instance creation'>
^self fromSeconds: (h * 60 + m) * 60 + s
]
Time class >> minutes: m [
"Answer a Time that is the given number of minutes past midnight"
<category: 'instance creation'>
^self fromSeconds: m * 60
]
Time class >> seconds: s [
"Answer a Time that is the given number of seconds past midnight"
<category: 'instance creation'>
^self fromSeconds: s
]
Time class >> readFrom: aStream [
"Parse an instance of the receiver (hours/minutes/seconds) from
aStream"
<category: 'instance creation'>
| hms i ch ws |
hms := {0. 0. 0}.
i := 1.
ch := $:.
[i <= 3 and: [aStream atEnd not and: [ch isSeparator not]]] whileTrue: [
ws := WriteStream on: (String new: 10).
[aStream atEnd not and: [(ch := aStream next) isDigit]]
whileTrue: [ws nextPut: ch].
hms at: i put: ws contents asNumber.
i := i + 1].
^self fromSeconds: (hms at: 1) * 3600 + ((hms at: 2) * 60) + (hms at: 3)
]
Time class >> nanosecondClockValue [
"Answer the number of milliseconds since startup"
<category: 'clocks'>
^self primNanosecondClock - ClockOnStartup
]
Time class >> millisecondClockValue [
"Answer the number of milliseconds since startup"
<category: 'clocks'>
^self nanosecondClockValue // 1000000
]
Time class >> millisecondsPerDay [
"Answer the number of milliseconds in a day"
<category: 'clocks'>
^86400000
]
Time class >> millisecondsToRun: timedBlock [
"Answer the number of milliseconds which timedBlock took to run"
<category: 'clocks'>
| startTime |
startTime := self millisecondClock.
timedBlock value.
^self millisecondClock - startTime
]
asNanoseconds [
<category: 'accessing (non ANSI & for Durations)'>
^seconds * 1000000000
]
asMilliseconds [
<category: 'accessing (non ANSI & for Durations)'>
^seconds * 1000
]
asSeconds [
<category: 'accessing (non ANSI & for Durations)'>
^seconds
]
hours [
"Answer the number of hours in the receiver"
<category: 'accessing (non ANSI & for Durations)'>
^(seconds quo: 3600) rem: 24
]
minutes [
"Answer the number of minutes in the receiver"
<category: 'accessing (non ANSI & for Durations)'>
^(seconds quo: 60) rem: 60
]
seconds [
"Answer the number of seconds in the receiver"
<category: 'accessing (non ANSI & for Durations)'>
^seconds rem: 60
]
hour [
"Answer the number of hours in the receiver"
<category: 'accessing (ANSI for DateAndTimes)'>
^seconds // 3600 \\ 24
]
hour12 [
"Answer the hour in a 12-hour clock"
<category: 'accessing (ANSI for DateAndTimes)'>
| h |
h := self hour \\ 12.
^h = 0 ifTrue: [12] ifFalse: [h]
]
hour24 [
"Answer the hour in a 24-hour clock"
<category: 'accessing (ANSI for DateAndTimes)'>
^self hour
]
minute [
"Answer the number of minutes in the receiver"
<category: 'accessing (ANSI for DateAndTimes)'>
^seconds // 60 \\ 60
]
second [
"Answer the number of seconds in the receiver"
<category: 'accessing (ANSI for DateAndTimes)'>
^seconds \\ 60
]
= aTime [
"Answer whether the receiver is equal to aTime"
<category: 'comparing'>
^self class == aTime class and: [seconds = aTime asSeconds]
]
< aTime [
"Answer whether the receiver is less than aTime"
<category: 'comparing'>
^seconds < aTime asSeconds
]
hash [
"Answer an hash value for the receiver"
<category: 'comparing'>
^seconds
]
addSeconds: timeAmount [
"Answer a new Time that is timeAmount seconds after the receiver"
<category: 'arithmetic'>
^Time new setSeconds: seconds + timeAmount
]
addTime: timeAmount [
"Answer a new Time that is timeAmount seconds after the receiver;
timeAmount is a Time."
<category: 'arithmetic'>
^Time new setSeconds: seconds + timeAmount asSeconds
]
subtractTime: timeAmount [
"Answer a new Time that is timeAmount seconds before the receiver;
timeAmount is a Time."
<category: 'arithmetic'>
^Time new setSeconds: seconds - timeAmount asSeconds
]
printOn: aStream [
"Print a representation of the receiver on aStream"
<category: 'arithmetic'>
self hours printOn: aStream.
aStream nextPut: $:.
self minutes < 10 ifTrue: [aStream nextPut: $0].
self minutes printOn: aStream.
aStream nextPut: $:.
self seconds < 10 ifTrue: [aStream nextPut: $0].
self seconds printOn: aStream
]
setSeconds: secs [
<category: 'private'>
seconds := secs \\ 86400
]
]
|