#REFACTORING by exept
class: Smalltalk class
changed: #recursiveInstallAutoloadedClassesFrom:rememberIn:maxLevels:noAutoload:packageTop:showSplashInLevels:
Transcript showCR:(... bindWith:...) -> Transcript showCR:... with:...
"{ Encoding: utf8 }"
"
COPYRIGHT (c) 1989 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' }"
"{ NameSpace: Smalltalk }"
Magnitude subclass:#Date
instanceVariableNames:'dateEncoding'
classVariableNames:'DayNames MonthNames DayAbbrevs MonthAbbrevs DefaultFormats
ShortFormats LongFormats EnvironmentChange'
poolDictionaries:''
category:'Magnitude-Time'
!
!Date class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1989 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
"
Instances of Date represent dates as year, month and day encoded in the
(private & hidden) instance dateEncoding. The value found there is
year*100*100 + month*100 + day
This makes magnitude-like comparison of dates easy, and the main components
d,m,y are easily reconstructed (assuming, that this is the stuff most used).
Do not depend on the internal representation -
it is private and not guaranteed for future versions.
The old representation used days since 1st Jan. 1901 internally -
with the new implementation, it is possible to reasonably represent almost
any Date.
(which insurance companies will like,
since they can now represent even very old people's birthday :-)
Notice:
no correction for pre-Gregorian dates (< 1583) is done.
For dates before 1582 (when calendars were changed from Julian to Gregorian),
the so called 'proleptic gregorian calendar' is used.
This assumes leap years to continue in the past as if a gregorian calendar was used.
Thus, 0000 is considered a leap year.
The printed representation of dates is controlled by resource definitions -
thus national variants are already supported (see file 'resources/Date.rs').
Compatibility notice:
due to historic reasons, there are some methods found twice
with different names in this class. The old ST/X methods will vanish
over time, but kept for a while to support existing applications
(the info on how these methods should be named
came somewhat late from the testers...).
Please do not use methods marked as obsolete.
Most useful methods:
Date today
(Date today) addDays:
(Date today) subtractDays:
[author:]
Claus Gittinger
[see also:]
Time AbstractTime
Filename
OperatingSystem
"
! !
!Date class methodsFor:'initialization'!
initDefaultNames
"read the language specific names."
|enDayNames enDayAbbrevs enMonthNames enMonthAbbrevs|
DayNames := Dictionary new.
DayAbbrevs := Dictionary new.
MonthNames := Dictionary new.
MonthAbbrevs := Dictionary new.
DefaultFormats := Dictionary new.
LongFormats := Dictionary new.
ShortFormats := Dictionary new.
enDayNames := #('monday'
'tuesday'
'wednesday'
'thursday'
'friday'
'saturday'
'sunday').
enDayAbbrevs := #('mon'
'tue'
'wed'
'thu'
'fri'
'sat'
'sun').
enMonthNames := #('january'
'february'
'march'
'april'
'may'
'june'
'july'
'august'
'september'
'october'
'november'
'december').
enMonthAbbrevs := #('jan'
'feb'
'mar'
'apr'
'may'
'jun'
'jul'
'aug'
'sep'
'oct'
'nov'
'dec').
DayNames at:#'en' put:enDayNames.
DayAbbrevs at:#'en' put:enDayAbbrevs.
MonthNames at:#'en' put:enMonthNames.
MonthAbbrevs at:#'en' put:enMonthAbbrevs.
DefaultFormats at:#'en' put:('%d-%m-%y').
ShortFormats at:#'en' put:('%d-%m-%y').
LongFormats at:#'en' put:('%(dayName), %d-%m-%y').
"/ take the "master" language here, for the caching
EnvironmentChange := (Smalltalk language asSymbol ~~ #'en').
"
Date initDefaultNames
"
!
initNames
"read the language specific names."
|lang|
DayNames isNil ifTrue:[
self initDefaultNames.
].
lang := Smalltalk language asSymbol.
lang ~~ #'en' ifTrue:[
self initNamesForLanguage: lang.
].
EnvironmentChange := false
"
Date initNames
"
!
initNamesForLanguage:language
"read the language specific names."
|resources lang
enDayNames enDayAbbrevs enMonthNames enMonthAbbrevs monthAbbrevKeys
enDefaultFormat enLongFormat enShortFormat may|
DayNames isNil ifTrue:[
self initDefaultNames.
].
lang := language asSymbol.
lang ~~ #'en' ifTrue:[
ResourcePack notNil ifTrue:[ "/ guard for tinytalk (no libview)
resources := ResourcePack forPackage:'stx:libbasic' resourceFileName:(language,'.rs') cached:false.
].
resources notNil ifTrue:[
enDayNames := DayNames at:#'en'.
enDayAbbrevs := DayAbbrevs at:#'en'.
enMonthNames := MonthNames at:#'en'.
enMonthAbbrevs := MonthAbbrevs at:#'en'.
monthAbbrevKeys := enMonthAbbrevs copy.
monthAbbrevKeys at:5 put:'MAY_ABBREV'.
enDefaultFormat := DefaultFormats at:#'en'.
enShortFormat := ShortFormats at:#'en'.
enLongFormat := LongFormats at:#'en'.
DefaultFormats at:lang put:(resources at:'DATEFORMAT' default:enDefaultFormat).
ShortFormats at:lang put:(resources at:'SHORTDATEFORMAT' default:enShortFormat).
LongFormats at:lang put:(resources at:'LONGDATEFORMAT' default:enLongFormat).
DayNames at:lang put:(resources array:enDayNames).
DayAbbrevs at:lang put:(resources array:enDayAbbrevs).
MonthNames at:lang put:(resources array:enMonthNames).
MonthAbbrevs at:lang put:(resources array:monthAbbrevKeys).
"/ may needs special care (same key for long and short name)
may := resources string:'MAY_ABBREV' default:nil.
may isNil ifTrue:[
may := resources string:'may'.
].
(MonthAbbrevs at:lang) at:5 put:may.
].
].
"
Date initNamesForLanguage:#de.
Date initNamesForLanguage:#fr.
Date initNamesForLanguage:#es.
"
"Modified (format): / 28-09-2011 / 15:56:41 / cg"
!
initialize
DayNames isNil ifTrue:[
self initDefaultNames.
].
Smalltalk addDependent:self.
Smalltalk language ~= 'en' ifTrue:[
EnvironmentChange := true
]
! !
!Date class methodsFor:'instance creation'!
fromDays:dayCount
"return a new Date, given the day-number starting with 0 at 1.Jan 1901;
(i.e. 'Date fromDays:0' returns 1st Jan. 1901).
Date asDays is the reverse operation.
Notice, that this is not able to represent dates before 1901!!.
Added for GNU/ST-80 compatibility"
|year rest d yearIncrement yearAsDays|
"approx. year"
year := (dayCount // 366) + 1901.
yearAsDays := (self yearAsDays:year).
dayCount < 0 ifTrue:[
rest := dayCount negated - yearAsDays + 1. "+1 for ST-80 compatibility"
yearIncrement := -1.
] ifFalse:[
rest := dayCount - yearAsDays + 1. "+1 for ST-80 compatibility"
yearIncrement := 1.
].
rest > 365 ifTrue:[
[d := self daysInYear:year. rest > d] whileTrue:[
"adjust"
year := year + yearIncrement.
rest := rest - d.
].
].
^ self newDay:rest year:year
"
Date fromDays:0 -> 1 jan 1901
Date fromDays:365 -> 1 jan 1902
Date fromDays:730 -> 1 jan 1903
Date fromDays:1095 -> 1 jan 1904
Date fromDays:1460 ->31 dec 1904 since 1904 was a leap year
"
"Modified: 1.7.1996 / 14:24:25 / cg"
!
fromDaysFrom0:dayCount
"return a new Date, given the day-number starting with 0 at 1.Jan 0;
(i.e. 'Date fromDaysSince0:0' returns 1st Jan. 0).
Date asDaysSince0 is the reverse operation.
Notice, that this is a private interface.
Also notice: does not care for Gregorian/Julisn calendar change"
|year rest d yearIncrement yearAsDaysFrom0|
"approx. year"
year := (dayCount // 366).
yearAsDaysFrom0 := (self yearAsDaysFrom0:year).
dayCount < 0 ifTrue:[
rest := dayCount negated - yearAsDaysFrom0 + 1. "+1 for ST-80 compatibility"
yearIncrement := -1.
] ifFalse:[
rest := dayCount - yearAsDaysFrom0 + 1. "+1 for ST-80 compatibility"
yearIncrement := 1.
].
rest > 365 ifTrue:[
[d := self daysInYear:year. rest > d] whileTrue:[
"adjust"
year := year + yearIncrement.
rest := rest - d.
].
].
^ self newDay:rest year:year
"
Date fromDaysFrom0:0 -> 1 jan 0
Date fromDaysFrom0:366 -> 1 jan 1
"
!
newDay:dayInYear year:year
"return a new Date, given the year and the day-in-year (starting at 1).
See also: Date today / Time now / Timestamp now.
ST-80 compatibility"
|monthAndDay|
((dayInYear between:1 and:365)
or:[dayInYear == 366 and:[self leapYear:year]]) ifFalse:[
"
this error is triggered, when you try to create a
day from an invalid day-in-year;
for example, 366 in a non-leap year.
I don't know, if ST-80 wraps to the next year(s) in this case.
"
^ self conversionErrorSignal raiseErrorString:' - Date: invalid day in year'.
].
monthAndDay := self monthAndDayFromDayInYear:dayInYear forYear:year.
^ self basicNew year:year month:(monthAndDay at:1) day:(monthAndDay at:2)
"
Date newDay:150 year:1994
Date newDay:1 year:1994
Date newDay:1 year:1901
Date newDay:1 year:1902
Date newDay:365 year:1992
Date newDay:366 year:1992
Date newDay:365 year:1994
Date newDay:366 year:1994
Date newDay:0 year:1994
Date newDay:271 year:2008
Date newDay:270 year:2008
Date newDay:271 year:2007
"
"Modified: 1.7.1996 / 14:22:24 / cg"
!
newDayInWeek:dayInWeek week:week year:yearArg
"return a new Date, given the year, the week (1..) and the day in week (1..7).
See http://en.wikipedia.org/wiki/ISO_week_date"
|weekDayOfJan4 dayInYear year|
year := yearArg.
weekDayOfJan4 := (self year:year month:1 day:4) dayInWeek.
dayInYear := (week * 7) + dayInWeek - (weekDayOfJan4 + 3).
dayInYear < 1 ifTrue:[
dayInYear := dayInYear + (self daysInYear:year-1).
year := year - 1.
].
dayInYear > (self daysInYear:year) ifTrue:[
dayInYear := dayInYear - (self daysInYear:year).
year := year + 1.
].
^ self newDay:dayInYear year:year.
"
Date newDayInWeek:6 week:39 year:2008
Date newDayInWeek:1 week:40 year:2014
Date newDayInWeek:1 week:44 year:2014
"
!
readFrom:aStringOrStream format:aSqueakFormatArrayOrFormatString
"return a new Date, reading a printed representation from aStream.
aSqueakFormatArrayOrFormatString may either be a squeak formatArray
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or a formatString (see printing instance protocol)."
^ self
readFrom:aStringOrStream
format:aSqueakFormatArrayOrFormatString
onError:[ self conversionErrorSignal raiseWith:aStringOrStream errorString:' - invalid Date' ]
"
Date readFrom:'19:11:1999' format:#( 1 2 3 )
Date readFrom:'19-nov-1999' format:#( 1 2 3 )
Date readFrom:'19:11:1999' format:#( 2 1 3 ) -> exception: wrong month
Date readFrom:'5:12:1999' format:#( 2 1 3 )
Date readFrom:'may-12-1999' format:#( 2 1 3 )
Date readFrom:'1999 may 12' format:#( 3 2 1 )
Date readFrom:'12/31/2001' format:#( 2 1 3 )
Date readFrom:' 31.08.2001' format:#( 1 2 3 )
Date readFrom:' 31.dec.2001' format:#( 1 2 3 )
Date readFrom:' 31.Dec.2001' format:#( 1 2 3 )
Date readFrom:' 31.dez.2001' format:#( 1 2 3 )
Date readFrom:'31/12/01' format:'%d %m %y' onError:'fail'
Date readFrom:'12/01' format:'%m %y' onError:'fail'
Date readFrom:'01' format:'%y' onError:'fail'
Date readFrom:'30.01' format:'%d %m' onError:'fail'
"
"Created: 16.11.1995 / 22:50:17 / cg"
"Modified: 8.10.1996 / 19:25:39 / cg"
!
readFrom:aStringOrStream format:aFormatStringOrSqueakFormatArray language:languageOrNil onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
aFormatStringOrSqueakFormatArray may either be a Squeak formatArray:
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or an ST/X formatString (see printing instance protocol).
For now %d, %m, %monthName, %shortMonthName, %y, %Y, %y1900, %y2000, %y1950 and %y1980 are supported in the formatString.
y1900 converts 2-digit year YY into 19YY,
y2000 into 20YY.
y1950, y1980, y1970 and Y are special;
if the year is below 50/80/70/70, it is converted to 20YY, otherwise to 19YY.
The formatString can have any of these characters '-.:,;/' as separator.
The format may be preceeded by a single numeric length (as in %2d) to specify how many
characters to read.
The formatString can also use a space as separator (for ex. '%d %m %y') and any separator will be allowed.
However, when a character separator is defined, only that separator will be expected.
TODO: make this a general feature of all DateAndTime classes.
"
|str|
str := aStringOrStream readStream.
^ [
|day month year dayOfYear monthAndDay|
aFormatStringOrSqueakFormatArray isString ifTrue:[
|formatStream fc c sel somePartAssoc len lStr|
formatStream := aFormatStringOrSqueakFormatArray readStream.
[formatStream atEnd] whileFalse:[
fc := formatStream next.
fc == $% ifTrue:[
sel := ''.
len := nil.
(fc := formatStream peekOrNil) notNil ifTrue:[
fc isDigit ifTrue:[
len := fc digitValue.
formatStream next.
]
].
(fc := formatStream peekOrNil) notNil ifTrue:[
fc == $( ifTrue:[
formatStream next.
sel := formatStream upTo:$)
] ifFalse:[
sel := sel , (formatStream throughAnyForWhich:[:ch | ch isLetter])
]
].
len notNil ifTrue:[
lStr := str next:len.
somePartAssoc := self readDatePartFrom:lStr readStream format:sel language:languageOrNil.
] ifFalse:[
somePartAssoc := self readDatePartFrom:str format:sel language:languageOrNil.
].
somePartAssoc key == #day ifTrue:[
day := somePartAssoc value.
] ifFalse:[somePartAssoc key == #month ifTrue:[
month := somePartAssoc value.
] ifFalse:[somePartAssoc key == #year ifTrue:[
year := somePartAssoc value.
] ifFalse:[somePartAssoc key == #dayOfYear ifTrue:[
dayOfYear := somePartAssoc value.
] ifFalse:[
self conversionErrorSignal raiseWith:aStringOrStream errorString:' - unexpected date part'
]]]].
] ifFalse:[
fc == Character space ifTrue:[
"/ Skip most possible separator characters
"/ (if not enough, should check for isNationalAlphaNumeric instead)
[(c := str peek) isSeparator
or:[ '-.:,;/\|?<>[]{}()#@!!$&^+=~*_"`' includes:c]] whileTrue:[str next].
] ifFalse:[
str skipSeparators.
str next ~= fc ifTrue:[^ exceptionBlock value].
str skipSeparators.
]
]
].
] ifFalse:[
|arg|
arg := Array new:3.
1 to:3 do:[:i|
|v|
[str peek isLetterOrDigit] whileFalse:[str next].
v := (str peek isDigit) ifTrue:[Integer readFrom:str]
ifFalse:[str nextAlphaNumericWord].
arg at:i put:v
].
year := arg at:(aFormatStringOrSqueakFormatArray at:3).
day := arg at:(aFormatStringOrSqueakFormatArray at:1).
month := arg at:(aFormatStringOrSqueakFormatArray at:2).
].
dayOfYear notNil ifTrue:[
monthAndDay := self monthAndDayFromDayInYear:dayOfYear forYear:year.
month := monthAndDay at:1.
day := monthAndDay at:2.
].
day isNil ifTrue:[ day := 1 ].
month isNil ifTrue:[ month := 1 ].
year isNil ifTrue:[ year := self today year ].
(year between:0 and:99) ifTrue:[
year := UserPreferences current twoDigitDateHandler value:year.
].
self year:year month:month day:day.
] on:Error do:[:ex|
exceptionBlock value
].
"
Date readFrom:'31 December 1992' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'19:11:1999' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'December, 5 1992' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'3-jan-95' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'12/31/1992' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'15.4.1992' printFormat:#(1 2 3) onError:'wrong date' -> german
Date readFrom:'10.4.1992' printFormat:#(1 2 3) onError:'fail' -> german
Date readFrom:'10.4.1992' printFormat:#(1 2 3) onError:['wrong date']
Date readFrom:'32.4.1992' printFormat:#(1 2 3) onError:['wrong date']
Date readFrom:'fooBar' printFormat:#(1 2 3) onError:['wrong date']
Date readFrom:'10.4' printFormat:#(1 2 3) onError:['wrong date']
Date readFrom:'10041999' printFormat:#(1 2 3) onError:['wrong date']
Date readFrom:'31/12/92' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' printFormat:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' printFormat:'%d %m %y' onError:'fail'
Date readFrom:'12/01' printFormat:'%m %y' onError:'fail'
Date readFrom:'01' printFormat:'%y' onError:'fail'
Date readFrom:'30.01' printFormat:'%d %m' onError:'fail'
Date readFrom:'300180' printFormat:'%2d%2m%2y' onError:'fail'
Date readFrom:'300170' printFormat:'%2d%2m%2y' onError:'fail' - gives 2070 as year
Date readFrom:'300170' printFormat:'%2d%2m%2Y' onError:'fail' - gives 1970 as year
Date readFrom:'300169' printFormat:'%2d%2m%2y' onError:'fail' - gives 2069 as year
Date readFrom:'300169' printFormat:'%2d%2m%2Y' onError:'fail' - gives 2069 as year
Date readFrom:'300170' printFormat:'%2d%2m%2(y1950)' onError:'fail' - gives 1970 as year
Date readFrom:'300170' printFormat:'%2d%2m%2(y1980)' onError:'fail' - gives 2070 as year
Date readFrom:'300181' printFormat:'%2d%2m%2(y1980)' onError:'fail' - gives 1981 as year
Date readFrom:'2015103' printFormat:'%4y%3(dayOfYear)' onError:'fail'
Date readFrom:'2018-12-03' printFormat:'%y %m %d' language: #de onError:'fail'
Date readFrom:'3-3-1995' printFormat:'%d %m %y' language: #de onError:'fail'
Date readFrom:'3-März-1995' printFormat:'%d %monthName %y' language: #de onError:'fail'
Date readFrom:'3-mär-1995' printFormat:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3/mär/1995' printFormat:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3/mär/1995' printFormat:'%d-%shortMonthName-%y' language: #de onError:'fail'
Date readFrom:'3-dez-1995' printFormat:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3-Dez-1995' printFormat:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3-Dezember-1995' printFormat:'%d %monthName %y' language: #de onError:'fail'
"
"Created: / 16-11-1995 / 22:50:17 / cg"
"Modified: / 08-10-1996 / 19:25:39 / cg"
"Modified (comment): / 03-12-2018 / 10:37:22 / Stefan Vogel"
!
readFrom:aStringOrStream format:aSqueakFormatArrayOrFormatString onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
aSqueakFormatArrayOrFormatString may either be a Squeak formatArray:
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or an ST/X formatString (see printing instance protocol).
All of the %-formats as in the printString are supported here.
(i.e. %d, %m and %y, %shortMonthName and %monthName)
In addition, %Y, %y1900, %y2000, %y1950 and %y1980 are supported:
y1900 converts 2-digit year YY into 19YY, y2000 into 20YY.
y1950, y1980 and Y are special; if the year is below 50/80/70, it is converted to 20YY, otherwise to 19YY.
TODO: make this a general feature of all DateAndTime classes.
"
^ self
readFrom:aStringOrStream
format:aSqueakFormatArrayOrFormatString
language:nil
onError:exceptionBlock
"
Date readFrom:'31 December 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'19:11:1999' format:#(1 2 3) onError:'fail'
Date readFrom:'December, 5 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'3-jan-95' format:#(1 2 3) onError:'fail'
Date readFrom:'12/31/1992' format:#(1 2 3) onError:'fail'
Date readFrom:'15.4.1992' format:#(1 2 3) onError:'wrong date' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:'fail' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'32.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'fooBar' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10.4' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10041999' format:#(1 2 3) onError:['wrong date']
Date readFrom:'31/12/92' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:'%d %m %y' onError:'fail'
Date readFrom:'12/01' format:'%m %y' onError:'fail'
Date readFrom:'01' format:'%y' onError:'fail'
Date readFrom:'30.01' format:'%d %m' onError:'fail'
Date readFrom:'311201' format:'%2d%2m%2y' onError:'fail'
"
"Created: 16.11.1995 / 22:50:17 / cg"
"Modified: 8.10.1996 / 19:25:39 / cg"
!
readFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:.
BUG:
For Smalltalk compatibility, this method handles american format
(i.e. month/day/year),
the common format with letter month in the middle (10 December 2007)
and ISO formats (yyyy-mm-dd) - as long as yyyy is > 12.
It also handles yyyymmdd and yymmdd.
It also handles short years (i.e. 2 digits), by evaluating the
UserPreferences current twoDigitDateHandler
By default, that one will convert late 90's days to 19xx, and all others to 20xx.
It does NOT handle the german/french and other dd-mm-yyyy formats.
use readFrom:printFormat:onError: for this."
^ [
|str pos items first second third month day year
yearString monthString dayString|
str := aStringOrStream readStream.
pos := str position.
items :=
3 timesCollect:[:idx|
str peek isNil ifTrue:[
nil
] ifFalse:[
[str peek isLetterOrDigit] whileFalse:[str next].
(str peek isDigit) ifTrue:[
Integer readFrom:str
] ifFalse:[
str nextAlphaNumericWord
].
].
].
first := items at:1.
second := items at:2.
third := items at:3.
second isNil ifTrue:[
"/ mh - only one number???
"/ assume yyyymmdd or yymmdd formats
str position:pos.
yearString := str next:4.
monthString := str next:2.
str atEnd ifTrue:[
dayString := monthString.
monthString := yearString copyFrom:3.
yearString := yearString copyTo:2.
] ifFalse:[
dayString := str next:2.
].
day := Integer readFrom:dayString.
month := Integer readFrom:monthString.
year := Integer readFrom:yearString.
] ifFalse:[
(first isInteger and:[second isInteger and:[first > 12]]) ifTrue:[
"ISO Date: yyyy-mm-dd"
year := first.
month := second.
day := third.
] ifFalse:[
year := third.
second isInteger ifTrue:[
"must be an american date mm/dd/yy"
month := first.
day := second.
] ifFalse:[
"3 Dec 2007"
day := first.
month := second.
].
].
].
(year between:0 and:99) ifTrue:[
year := UserPreferences current twoDigitDateHandler value:year.
].
self year:year month:month day:day.
] on:Error do:exceptionBlock.
"
Date readFromString:'31 December 1992'
Date readFrom:'19:11:1999' onError:'wrong date'.
Date readFrom:'2007-12-31' onError:'wrong date'.
Date readFromString:'December, 5 1992'
Date readFromString:'12/31/1992'
Date readFromString:'01/02/1992'
Date readFromString:'3-jan-95'
Date readFromString:'3-jan-01'
Date readFromString:'12/31/01'
Date readFromString:'15.4.1992' -> german; leads to an error
Date readFromString:'10.4.1992' -> german; leads to a wrong date
Date readFromString:'10.4.1992' onError:['wrong date']
Date readFromString:'32.4.1992' onError:['wrong date']
Date readFromString:'fooBar' onError:['wrong date']
Date readFromString:'10.4' onError:['wrong date']
Date readFromString:'10041999' onError:['wrong date']
Date readFromString:'20140111' onError:['wrong date']
Date readFrom:'20140111'
Date readFrom:'140111'
Date readFrom:'990111'
"
"Created: / 16-11-1995 / 22:50:17 / cg"
"Modified: / 08-10-1996 / 19:25:39 / cg"
"Modified (comment): / 09-01-2019 / 18:25:32 / Claus Gittinger"
!
today
"return a date, representing today.
See also: Time now / Timestamp now."
^ self fromOSTime:(OperatingSystem getOSTime)
"
Date today
"
"Modified: 1.7.1996 / 15:20:16 / cg"
!
tomorrow
"return a date, representing tomorrow.
See also: Time now / Timestamp now."
^ self today addDays:1
"
Date tomorrow
Date tomorrow dayInWeek
"
!
utcToday
"return a date, representing today in UTC.
That is, the current date in London without any daylight saving adjustments.
See also: Time now / Timestamp now."
^ self new fromUtcOSTime:(OperatingSystem getOSTime)
"
Date today
Date utcToday
"
"Modified: 1.7.1996 / 15:20:16 / cg"
!
year:year month:month day:day
"return a new Date, given the day, month and year.
For your convenience, month may be either an integer
or the month's name as a string.
WARNING: semantics changed: 0..99 is no longer treated as 1900..1999,
but as 0..99 now.
Any such adjustments must be made by the caller of this method now
(see those, for example readFrom:onError:)"
|monthIndex ok|
(year < 100 and:[year > 0]) ifTrue:[
'Date [warning]: year in [0..99] no longer converted to [1900..1999]' infoPrintCR.
].
year class ~= SmallInteger ifTrue:[
"we support a lot of future, but LargeInteger years fail in #isLeapYear"
self conversionErrorSignal raiseWith:year errorString:' - invalid year in Date (way too large)'.
].
month isInteger ifTrue:[
monthIndex := month
] ifFalse:[
monthIndex := self indexOfMonth:month
].
(monthIndex == 2 and:[day == 29]) ifTrue:[
ok := self leapYear:year
] ifFalse:[
ok := day <= (self daysInMonth:month forYear:year)
].
((day > 0) and:[ok]) ifTrue:[
^ self basicNew year:year month:monthIndex day:day.
].
"this error is triggered if you try to create a date from an
invalid year/month/day combination;
Such as 29-feb-year, where year is no leap year
"
self conversionErrorSignal raiseErrorString:' - invalid date'.
"
Date year:1993 month:'may' day:8
Date year:1993 month:5 day:8
Date year:2004 month:'feb' day:29
Date year:2003 month:'feb' day:29
Date year:5 month:'feb' day:28
Date year:95 month:'feb' day:28
"
!
yesterday
"return a date, representing yesterday.
See also: Time now / Timestamp now."
^ self today subtractDays:1
"
Date yesterday
Date yesterday dayInWeek
"
! !
!Date class methodsFor:'Compatibility-Dolphin'!
newDay:day monthIndex:month year:year
"Dolphin compatibility - same as newDay:month:year"
^ self year:year month:month day:day
"
Date newDay:8 monthIndex:5 year:1993
"
"Modified: 19.4.1996 / 15:28:15 / cg"
! !
!Date class methodsFor:'Compatibility-ST80'!
newDay:day monthNumber:monthIndex year:year
"ST80 compatibility"
^ self year:year month:monthIndex day:day
! !
!Date class methodsFor:'Compatibility-Squeak'!
current
"return the current date"
^ self today
"
Date current
"
!
fromSeconds:seconds
"Answer an instance of me which is 'seconds' seconds after January 1, 1901."
| secondsInDay |
secondsInDay := 24 * 60 * 60.
^self fromDays: seconds // secondsInDay
"
Date fromSeconds:0
Date fromSeconds:(24 * 60 * 60 * 365)
"
!
readMMDDYYYYFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:"
^ [
|str monthString month dayString day year yearString|
str := aStringOrStream readStream.
monthString := str next:2.
[str peek isDigit] whileFalse:[str next].
dayString := str next:2.
[str peek isDigit] whileFalse:[str next].
yearString := str next:4.
year := Integer readFrom:yearString.
month := Integer readFrom:monthString.
day := Integer readFrom:dayString.
self year:year month:month day:day.
] on:Error do:exceptionBlock
"
Date readMMDDYYYYFrom:'10041999' onError:['wrong date']
Date readMMDDYYYYFrom:'100419' onError:['wrong date']
Date readMMDDYYYYFrom:'10040001' onError:['wrong date']
Date readMMDDYYYYFrom:'10-04-2001' onError:['wrong date']
"
"Created: / 16-11-1995 / 22:50:17 / cg"
"Modified: / 08-10-1996 / 19:25:39 / cg"
"Modified (comment): / 09-01-2019 / 18:20:37 / Claus Gittinger"
!
readYYMMDDFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:"
^ [
|str monthString month dayString day yearString year|
str := aStringOrStream readStream.
yearString := str next:2.
[str peek isDigit] whileFalse:[str next].
monthString := str next:2.
[str peek isDigit] whileFalse:[str next].
dayString := str next:2.
day := Integer readFrom:dayString.
month := Integer readFrom:monthString.
year := Integer readFrom:yearString.
year := UserPreferences current twoDigitDateHandler value:year.
self year:year month:month day:day
] on:Error do:exceptionBlock
"
Date readYYMMDDFrom:'991004' onError:['wrong date']
Date readYYMMDDFrom:'211004' onError:['wrong date']
Date readYYMMDDFrom:'21-10-04' onError:['wrong date']
"
"Created: / 09-01-2019 / 18:16:24 / Claus Gittinger"
!
readYYMMFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:"
^ [
|str monthString month dayString day yearString year|
str := aStringOrStream readStream.
yearString := str next:2.
[str peek isDigit] whileFalse:[str next].
monthString := str next:2.
day := 1.
month := Integer readFrom:monthString.
year := Integer readFrom:yearString.
year := UserPreferences current twoDigitDateHandler value:year.
self year:year month:month day:day
] on:Error do:exceptionBlock
"
Date readYYMMFrom:'9910' onError:['wrong date']
Date readYYMMFrom:'2010' onError:['wrong date']
Date readYYMMFrom:'20-10' onError:['wrong date']
"
"Created: / 09-01-2019 / 18:18:24 / Claus Gittinger"
!
readYYYYMMDDFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:"
^ [
|str monthString month dayString day yearString year|
str := aStringOrStream readStream.
yearString := str next:4.
[str peek isDigit] whileFalse:[str next].
monthString := str next:2.
[str peek isDigit] whileFalse:[str next].
dayString := str next:2.
day := Integer readFrom:dayString.
month := Integer readFrom:monthString.
year := Integer readFrom:yearString.
self year:year month:month day:day
] on:Error do:exceptionBlock
"
Date readYYYYMMDDFrom:'19991004' onError:['wrong date']
Date readYYYYMMDDFrom:'1999-10-04' onError:['wrong date']
Date readYYYYMMDDFrom:'911004' onError:['wrong date']
"
"Modified (comment): / 09-01-2019 / 18:21:05 / Claus Gittinger"
!
readYYYYMMFrom:aStringOrStream onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
Notice, that this is not the storeString format and
is different from the format expected by readFrom:"
^ [
|str monthString month dayString day yearString year|
str := aStringOrStream readStream.
yearString := str next:4.
[str peek isDigit] whileFalse:[str next].
monthString := str next:2.
day := 1.
month := Integer readFrom:monthString.
year := Integer readFrom:yearString.
self year:year month:month day:day
] on:Error do:exceptionBlock
"
Date readYYYYMMFrom:'199910' onError:['wrong date']
Date readYYYYMMFrom:'1999-10' onError:['wrong date']
Date readYYYYMMFrom:'9110' onError:['wrong date']
"
"Created: / 09-01-2019 / 18:17:28 / Claus Gittinger"
!
year:year day:dayInYear
"return a new Date, given the year and the day-in-year (starting at 1).
See also: Date today / Time now / Timestamp now.
Squeak compatibility"
^ self newDay:dayInYear year:year
"
self year:1970 day:1
self year:2000 day:1
"
"Created: / 26-05-2019 / 11:57:36 / Claus Gittinger"
! !
!Date class methodsFor:'change & update'!
update:something with:aParameter from:changedObject
((something == #Language) or:[something == #LanguageTerritory]) ifTrue:[
"just remember change for next access"
EnvironmentChange := true
]
"Created: 15.6.1996 / 15:19:25 / cg"
! !
!Date class methodsFor:'error handling'!
conversionErrorSignal
"return the signal used for conversion error handling"
^ DateConversionError
! !
!Date class methodsFor:'general queries'!
abbreviatedDayNamesForLanguage:languageOrNilForDefault
"return a collection of short month-names for a given language or the
current language if nil is given.
The returned strings depend on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, english names are returned"
|langDayAbbrevs lang|
(DayAbbrevs isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
lang := languageOrNilForDefault notNil ifTrue:[languageOrNilForDefault] ifFalse:[Smalltalk language].
langDayAbbrevs := DayAbbrevs at:lang ifAbsent:nil.
"/ If language is not found, try to initialize it from the resources and try again
langDayAbbrevs isNil ifTrue:[
self initNamesForLanguage: lang.
"/ If language initialization failed, take english dayAbbrevs
langDayAbbrevs := DayAbbrevs at:lang ifAbsent:[DayAbbrevs at:#en.].
].
^ langDayAbbrevs
"
self abbreviatedDayNamesForLanguage:#en
self abbreviatedDayNamesForLanguage:#de
self abbreviatedDayNamesForLanguage:#fr
self abbreviatedDayNamesForLanguage:#es
self abbreviatedDayNamesForLanguage:#zulu
self abbreviatedDayNamesForLanguage:nil
"
!
abbreviatedMonthNamesForLanguage:languageOrNilForDefault
"return a collection of short month-names for a given language or the
current language if nil is given.
The returned strings depend on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, english names are returned"
|langMonthAbbrevs lang|
(MonthAbbrevs isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
lang := languageOrNilForDefault notNil ifTrue:[languageOrNilForDefault] ifFalse:[Smalltalk language].
langMonthAbbrevs := MonthAbbrevs at:lang ifAbsent:nil.
"/ If language is not found, try to initialize it from the resources and try again
langMonthAbbrevs isNil ifTrue:[
self initNamesForLanguage: lang.
"/ If language initialization failed, take english monthAbbrevs
langMonthAbbrevs := MonthAbbrevs at:lang ifAbsent:[MonthAbbrevs at:#en.].
].
^ langMonthAbbrevs
"
self abbreviatedMonthNamesForLanguage:#en
self abbreviatedMonthNamesForLanguage:#de
self abbreviatedMonthNamesForLanguage:#fr
self abbreviatedMonthNamesForLanguage:#es
self abbreviatedMonthNamesForLanguage:#zulu
self abbreviatedMonthNamesForLanguage:nil
"
"Modified (format): / 18-07-2011 / 09:34:20 / cg"
!
abbreviatedNameOfDay:dayIndex
"given a day index (1..7),
return the abbreviated name of the day
for the current language setting"
^ self abbreviatedNameOfDay:dayIndex language:nil
"
Date abbreviatedNameOfDay:4
"
!
abbreviatedNameOfDay:dayIndex language:langOrNilForDefault
"given a day index (1..7),
return the abbreviated name of the day.
For nil, the current default language us used.
For unknown languages, english is used."
^ (self abbreviatedDayNamesForLanguage:langOrNilForDefault) at:dayIndex
"
Date abbreviatedNameOfDay:4 language:#en
Date abbreviatedNameOfDay:4 language:#de
Date abbreviatedNameOfDay:4 language:#zulu
Date abbreviatedNameOfDay:4 language:nil
"
!
abbreviatedNameOfMonth:monthIndex
"given a month index (1..12),
return the abbreviated name of the month
for the current language setting"
^ self abbreviatedNameOfMonth:monthIndex language:nil
"
Date abbreviatedNameOfMonth:11
Date abbreviatedNameOfMonth:12
"
!
abbreviatedNameOfMonth:monthIndex language:langOrNilForDefault
"given a month index (1..12),
return the abbreviated name of the month.
For nil, the current default language us used.
For unknown languages, english is used."
^ (self abbreviatedMonthNamesForLanguage:langOrNilForDefault) at:monthIndex
"
Date abbreviatedNameOfMonth:11 language:#en
Date abbreviatedNameOfMonth:12 language:#en
Date abbreviatedNameOfMonth:12 language:#de
Date abbreviatedNameOfMonth:12 language:#fr
Date abbreviatedNameOfMonth:12 language:#zulu
Date abbreviatedNameOfMonth:12 language:nil
"
!
dateAndTimeNow
"return an array containing the date and time of now.
As these provide no timezone info, this should be only used for user interface purposes."
^ Time dateAndTimeNow
"
Date dateAndTimeNow
"
!
dayNamesForLanguage:languageOrNilForDefault
"return a collection of day-names for a given language or the
current language if nil is given.
The returned strings depend on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, english names are returned"
|langDayNames lang|
(DayNames isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
lang := languageOrNilForDefault notNil ifTrue:[languageOrNilForDefault] ifFalse:[Smalltalk language].
langDayNames := DayNames at:lang ifAbsent:nil.
"/ If language is not found, try to initialize it from the resources and try again
langDayNames isNil ifTrue:[
self initNamesForLanguage: lang.
"/ If language initialization failed, take english dayNames
langDayNames := DayNames at:lang ifAbsent:[DayNames at:#en].
].
^ langDayNames
"
self dayNamesForLanguage:#en
self dayNamesForLanguage:#de
self dayNamesForLanguage:#fr
self dayNamesForLanguage:#es
self dayNamesForLanguage:#zulu
self dayNamesForLanguage:nil
"
"Modified (format): / 18-07-2011 / 09:34:08 / cg"
!
dayOfFirstWeekInYear:aYear
"for a given year, return the day corresponding to that year's monday of week-01.
The 1st week is the one, in which the first thursday is found;
and the 1st day of that week is the preceeding monday
(that means: that the returned day might be a day of the previous year!!)"
|day dayInWeekOf1stJan firstThursday firstDayInWeek|
"/ find the first thursday ...
day := self newDay:1 year:aYear.
dayInWeekOf1stJan := day dayInWeek.
dayInWeekOf1stJan > 4 ifTrue:[
firstThursday := day addDays:(4 - dayInWeekOf1stJan + 7).
] ifFalse:[
firstThursday := day addDays:(4 - dayInWeekOf1stJan).
].
"/ back to the preceeding monday
firstDayInWeek := firstThursday subtractDays:3.
^ firstDayInWeek
"
Date newDay:1 year:1900
Date dayOfFirstWeekInYear:1900
Date dayOfFirstWeekInYear:1998
Date dayOfFirstWeekInYear:1999
Date dayOfFirstWeekInYear:2000
Date dayOfFirstWeekInYear:2001
"
!
dayOfWeek:dayName
"given the name of a day (either string or symbol),
return the day-index (1 for monday; 7 for sunday).
Return 0 for invalid day name"
|d|
d := self dayOfWeek:dayName language:nil.
d == 0 ifTrue:[
d := self dayOfWeek:dayName language:'en'.
].
^ d
"
Date dayOfWeek:'wednesday'
Date dayOfWeek:'Wednesday'
Date dayOfWeek:'Mittwoch'
"
!
dayOfWeek:dayName language:lang
"given the name of a day (either string or symbol),
return the day-index (1 for monday; 7 for sunday).
Return 0 for invalid day name.
For nil, Smalltalk language is used,
for unknown languages, english is used."
|idx langDayNames|
langDayNames := self dayNamesForLanguage:lang.
idx := langDayNames indexOf:dayName.
idx == 0 ifTrue:[
idx := langDayNames indexOf:dayName asLowercase.
].
^ idx
"
Date dayOfWeek:'wednesday' language:'en'
Date dayOfWeek:'Wednesday' language:'en'
"
!
daysInMonth:month forYear:yearInteger
"given the name of a month and a year, return the number
of days this month has (modified GNU).
return 0 if the month name was invalid.
For your convenience, month maybe an integer or name-string."
|monthIndex "{ Class: SmallInteger }"|
month isInteger ifTrue:[
monthIndex := month
] ifFalse:[
monthIndex := self indexOfMonth:month
].
^ self daysInMonthIndex:monthIndex forYear:yearInteger
"
Date daysInMonth:2 forYear:1980
Date daysInMonth:2 forYear:1981
Date daysInMonth:'feb' forYear:1981
"
!
daysInYear:yearInteger
"return the number of days in a year"
(self leapYear:yearInteger) ifTrue:[^ 366].
^ 365
"
Date daysInYear:1900
Date daysInYear:1901
Date daysInYear:1904
Date daysInYear:1980
Date daysInYear:1981
"
!
daysUntilMonth:month forYear:yearInteger
"given the name of a month and a year, return the number
of days from 1st january to last of prev month of that year.
Return 0 if the month name/index is invalid or is january.
For your convenience, month maybe an integer or name-string."
|monthIndex|
month isInteger ifTrue:[
monthIndex := month
] ifFalse:[
monthIndex := self indexOfMonth:month
].
^ self daysUntilMonthIndex:monthIndex forYear:yearInteger
"
Date daysUntilMonth:'feb' forYear:1993
Date daysUntilMonth:'jan' forYear:1993
"
!
defaultFormatString
"a language specific format string to present dates in user interfaces.
Do not use this to store/retrieve dates (use ISO8601 for that)"
(DefaultFormats isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
^ DefaultFormats at:Smalltalk language ifAbsent:(DefaultFormats at:#en).
"
Date today printStringFormat:(Date defaultFormatString).
Date today printStringFormat:(Date longFormatString).
Date today printStringFormat:(Date shortFormatString).
"
!
firstDayOfYear:inYear
"return the weekDay-index of the 1st-january of the given year.
1->monday, 2->tuesday, ... 7->sunday"
| t d |
((inYear < 1) or:[ inYear > 9999]) ifTrue:[
^ 0.
].
"/ normal Gregorian calendar: one extra day per four years
t := 4 + inYear + ((inYear + 3) // 4).
inYear > 1800 ifTrue:[
"/ Julian calendar: regular Gregorian less 3 days per 400
t := t - ((inYear - 1701) // 100) + ((inYear - 1601) // 400).
].
inYear > 1752 ifTrue:[
"/ calendar changeover
t := t + 3.
].
d := t \\ 7.
"/ convert from 0 (sunday) .. 6 (saturday)
"/ to 1 (munday) .. 7 (sunday)
d == 0 ifTrue:[^ 7].
^ d
"
self firstDayOfYear:2000
(Date newDay:1 year:2000) dayInWeek
self firstDayOfYear:1999
(Date newDay:1 year:1999) dayInWeek
self firstDayOfYear:1998
(Date newDay:1 year:1998) dayInWeek
self firstDayOfYear:2001
(Date newDay:1 year:2001) dayInWeek
self firstDayOfYear:2002
(Date newDay:1 year:2002) dayInWeek
self firstDayOfYear:2006
(Date newDay:1 year:2006) dayInWeek
self firstDayOfYear:1800
(Date newDay:1 year:1800) dayInWeek
"
!
indexOfMonth:aMonthString
"given the name of a month (either string or symbol),
return the month-index (1 for jan; 12 for december).
The given string may be a full or abbreviated name,
case is ignored.
Return 0 for invalid month name."
|monthIndex|
monthIndex := self indexOfMonth:aMonthString language:nil.
"/ if not found, retry in english
(monthIndex == 0 and:[ Smalltalk language ~= #en ])
ifTrue:[
monthIndex := self indexOfMonth:aMonthString language:#en.
].
^ monthIndex
"
Date indexOfMonth:'jan'
Date indexOfMonth:'Jan'
Date indexOfMonth:'December'
Date indexOfMonth:'Dezember'
Date indexOfMonth:'december'
Date indexOfMonth:'dezember'
"
"Modified: / 08-10-2006 / 14:22:06 / cg"
!
indexOfMonth:aMonthString language:languageOrNil
"given the name of a month (either string or symbol),
return the month-index (1 for jan; 12 for december).
The given string may be a full or abbreviated name,
case is ignored.
Return 0 for invalid month name.
For nil, Smalltalk language (i.e. the current language setting) is used,
for unknown languages, english is used."
|idx name langMonthNames langMonthAbbrevs|
langMonthNames := self monthNamesForLanguage:languageOrNil.
langMonthAbbrevs := self abbreviatedMonthNamesForLanguage:languageOrNil.
name := aMonthString asLowercase.
idx := langMonthAbbrevs indexOf:name.
idx ~~ 0 ifTrue:[^ idx].
idx := langMonthNames indexOf:name.
idx ~~ 0 ifTrue:[^ idx].
name at:1 put:(name at:1) asUppercase.
idx := langMonthAbbrevs indexOf:name.
idx ~~ 0 ifTrue:[^ idx].
idx := langMonthNames indexOf:name.
idx ~~ 0 ifTrue:[^ idx].
^ idx
"
Date indexOfMonth:'jan' language:#en
Date indexOfMonth:'Jan' language:#en
Date indexOfMonth:'December' language:#en
"
"Modified: / 08-10-2006 / 14:20:17 / cg"
!
leapYear:yearInteger
"return true, if yearInteger is a leap year.
For years before 1583, the proleptic calendar is used
(i.e. assuming there was a gregorian calendar in effect)"
|y "{ Class: SmallInteger }"|
y := yearInteger.
(y \\ 4 == 0) ifTrue:[
(y \\ 100 ~~ 0) ifTrue:[^ true].
(y \\ 400 == 0) ifTrue:[^ true]
].
^ false
"
Date leapYear:1992
Date leapYear:1994
Date leapYear:1900
Date leapYear:2000
Date leapYear:0
Date leapYear:-1
Date leapYear:-2
Date leapYear:-3
Date leapYear:-4
"
!
longFormatString
(LongFormats isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
^ LongFormats at:Smalltalk language ifAbsent:(LongFormats at:#en).
"
Date today printStringFormat:(Date defaultFormatString).
Date today printStringFormat:(Date longFormatString).
Date today printStringFormat:(Date shortFormatString).
"
!
monthAndDayFromDayInYear:aDayInYear forYear:yearInteger
"given a day-in-year (1..365) return an Array containing the
month index and the day-in-month. Return nil if the argument is invalid."
|restDays daysInMonth|
restDays := aDayInYear.
restDays < 1 ifTrue:[^ nil].
1 to:12 do:[:m |
daysInMonth := self daysInMonthIndex:m forYear:yearInteger.
restDays <= daysInMonth ifTrue:[
^ Array with:m with:restDays
].
restDays := restDays - daysInMonth
].
restDays > daysInMonth ifTrue:[^ nil].
^ Array with:12 with:restDays
"
Date monthAndDayFromDayInYear:66 forYear:1980
Date monthAndDayFromDayInYear:66 forYear:1981
"
!
monthNamesForLanguage:languageOrNilForDefault
"return a collection of month-names for a given language or the
current language if nil is given.
The returned strings depend on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, english names are returned"
|langMonthNames lang|
(MonthNames isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
lang := languageOrNilForDefault notNil ifTrue:[languageOrNilForDefault] ifFalse:[Smalltalk language].
langMonthNames := MonthNames at:lang ifAbsent:nil.
"/ If language is not found, try to initialize it from the resources and try again
langMonthNames isNil ifTrue:[
self initNamesForLanguage: lang.
"/ If language initialization failed, take english monthNames
langMonthNames := MonthNames at:lang ifAbsent:[MonthNames at:#en.].
].
^ langMonthNames
"
self monthNamesForLanguage:#en
self monthNamesForLanguage:#de
self monthNamesForLanguage:#fr
self monthNamesForLanguage:#es
self monthNamesForLanguage:#zulu
self monthNamesForLanguage:nil
"
"Modified: / 18-07-2011 / 09:34:32 / cg"
!
nameOfDay:dayIndex
"given a day index (1..7), return the name of the day"
^ self nameOfDay:dayIndex language:nil
"
Date nameOfDay:1
Date nameOfDay:4
"
!
nameOfDay:dayIndex language:lang
"given a day index (1..7), return the name of the day.
For nil, Smalltalk language is used,
for unknown languages, english is used."
^ (self dayNamesForLanguage:lang) at:dayIndex
"
Date nameOfDay:4 language:#en
"
!
nameOfMonth:monthIndex
"given a month index (1..12), return the name of the month"
^ self nameOfMonth:monthIndex language:nil
"
Date nameOfMonth:11
Date nameOfMonth:12
Date nameOfMonth:4
"
!
nameOfMonth:monthIndex language:lang
"given a month index (1..12), return the name of the month.
For nil, Smalltalk language is used,
for unknown languages, english is used."
^ (self monthNamesForLanguage:lang) at:monthIndex
"
Date nameOfMonth:11 language:#en
Date nameOfMonth:12 language:#en
Date nameOfMonth:4 language:#en
"
!
shortFormatString
(ShortFormats isNil or:[EnvironmentChange]) ifTrue:[
self initNames
].
^ ShortFormats at:Smalltalk language ifAbsent:(ShortFormats at:#en).
"
Date today printStringFormat:(Date defaultFormatString).
Date today printStringFormat:(Date longFormatString).
Date today printStringFormat:(Date shortFormatString).
"
!
weekInYearOf:aDateOrTimestamp
"for a given date or timeStamp, return the week-number.
The returned week number starts with 1 for the first week which has a thursday in it.
(see DIN 1355-1/ISO 8601)
The rule is:
every monday (and only monday), a new week begins
the first week is the one which has at least 4 days of the new year in it
Be prepared: this definition can lead to the 1st week starting in the old year!!"
|date dayInYear numDays dayOfFirstWeekInYear dayOfFirstWeekInNextYear week|
date := aDateOrTimestamp asDate.
dayInYear := date dayInYear.
dayOfFirstWeekInYear := self dayOfFirstWeekInYear:date year.
numDays := date subtractDate:dayOfFirstWeekInYear.
"/ careful with the first days - could be W52/W53 of the previous year ...
numDays < 0 ifTrue:[
"/ not in a week here ...
"/ can be either 52 or 53, depending on the previous year.
^ self weekInYearOf:(self year:date year - 1 month:12 day:31)
].
"/ compute the week
week := numDays // 7 + 1.
"/ careful with the last days - could be W01 of the next year ...
week == 53 ifTrue:[
dayOfFirstWeekInNextYear := self dayOfFirstWeekInYear:aDateOrTimestamp year + 1.
date >= dayOfFirstWeekInNextYear ifTrue:[
^ 1
].
].
^ week
"
Timestamp now weekInYear
Date weekInYearOf:(Date newDay:31 month:12 year:1999) was a friday;
Date weekInYearOf:(Timestamp newDay:1 year:2000) was a saturday; therefore last week of 1999
Date weekInYearOf:(Timestamp newDay:2 year:2000) was a sunday; therefore last week of 1999
Date weekInYearOf:(Timestamp newDay:3 year:2000) was a monday -> W01
Date weekInYearOf:(Timestamp newDay:4 year:2000) was a tuesday -> W01
Date weekInYearOf:(Timestamp newDay:5 year:2000) was a wed -> W01
Date weekInYearOf:(Timestamp newDay:6 year:2000) was a thursday -> W01
Date weekInYearOf:(Timestamp newDay:7 year:2000) was a fri -> W01
Date weekInYearOf:(Timestamp newDay:8 year:2000) was a sat -> W01
Date weekInYearOf:(Timestamp newDay:9 year:2000) was a sun -> W01
Date weekInYearOf:(Timestamp newDay:10 year:2000) was a monday -> W02
Date weekInYearOf:(Timestamp newDay:16 year:2000) was a sunday -> W02
Date weekInYearOf:(Timestamp newDay:17 year:2000) was a monday -> W03
Date weekInYearOf:(Date newDay:1 month:1 year:2001)
Date weekInYearOf:(Date newDay:2 month:1 year:2001)
Date weekInYearOf:(Date newDay:3 month:1 year:2001)
Date weekInYearOf:(Date newDay:24 month:12 year:2001) -> W52
Date weekInYearOf:(Date newDay:30 month:12 year:2001) -> W52
Date weekInYearOf:(Date newDay:31 month:12 year:2001) -> W01
Date weekInYearOf:(Date newDay:1 month:1 year:2002)
Date weekInYearOf:(Date newDay:2 month:1 year:2002)
Date weekInYearOf:(Date newDay:7 month:1 year:2002)
Date weekInYearOf:(Date newDay:26 month:9 year:2008)
Date weekInYearOf:(Date newDay:27 month:9 year:2008)
Date weekInYearOf:(Date newDay:4 month:1 year:2008)
Date weekInYearOf:(Date newDay:1 month:1 year:2010)
Date weekInYearOf:(Date newDay:2 month:1 year:2010)
Date weekInYearOf:(Date newDay:3 month:1 year:2010)
Date weekInYearOf:(Date newDay:4 month:1 year:2010)
"
!
yearAsDays: yearInteger
"Returns the number of days since Jan 1, 1901. (GNU)
to the first Jan of the year, yearInteger.
For 1901 this is zero, for 1902 it's 365.
Defined for years >= 1901"
|y "{ Class: SmallInteger }"|
y := yearInteger - 1900.
y := y - 1.
^ (y * 365)
+ (y // 4)
- (y // 100)
+ ((y + 300) // 400)
"
Date yearAsDays:5
Date yearAsDays:1900
Date yearAsDays:1901
Date yearAsDays:1902
Date yearAsDays:1903
Date yearAsDays:1904
Date yearAsDays:1905
Date yearAsDays:1994
(Date yearAsDays:2001) - (Date yearAsDays:2000)
"
!
yearAsDaysFrom0: yearInteger
"Returns the number of days since Jan 1, 0 to Jan 1, yearInteger
without caring for gregorian calendar change
(i.e. as if there was a gregorian for all time).
Also assuming that the leapYear rules were present in pre-gregorian times also.
Used internally to compute date differences.
In previous versions, dates were counted relative to 1.1.1901.
This is no longer done; however, for backward compatibility, the old yearAsDays
and Date fromDays is still supported.
For years >= 1901 it must hold that:
yearAsDaysFrom0(d1) - yearAsDaysFrom0(d2)
is the same as
yearAsDays(d1) - yearAsDays(d2)
"
|y "{ Class: SmallInteger }"|
yearInteger == 0 ifTrue:[^ 0].
y := yearInteger - 1.
^ 366 "/ 0 would have been a leap year
+ (y * 365)
+ (y // 4) "/ every 4th year is a leap year
- (y // 100) "/ but not evey 100th
+ (y // 400) "/ but evey 400th is
"
Date yearAsDaysFrom0:1900
Date yearAsDaysFrom0:1901
Date yearAsDaysFrom0:1902
Date yearAsDaysFrom0:1903
Date yearAsDaysFrom0:1904
Date yearAsDaysFrom0:1905
Date yearAsDaysFrom0:1994
(Date yearAsDays:2001) - (Date yearAsDays:2000)
(Date yearAsDaysFrom0:2001) - (Date yearAsDaysFrom0:2000)
(Date yearAsDays:2002) - (Date yearAsDays:2001)
(Date yearAsDaysFrom0:2002) - (Date yearAsDaysFrom0:2001)
Date yearAsDaysFrom0:-4 -1461 -- -4 was a leap year
Date yearAsDaysFrom0:-3 -1095
Date yearAsDaysFrom0:-2 -730
Date yearAsDaysFrom0:-1 -365
Date yearAsDaysFrom0:0 0
Date yearAsDaysFrom0:1 366 -- 0 was a leap year
Date yearAsDaysFrom0:2 731
Date yearAsDaysFrom0:3 1096
Date yearAsDaysFrom0:4 1461
Date yearAsDaysFrom0:5 1827 -- 0 and 4 are leap years
"
! !
!Date class methodsFor:'obsolete'!
day:day month:month year:year
"return a new Date, given the day, month and year.
Obsolete:
use newDay:month:year: for ST-80 compatibility"
<resource: #obsolete>
"sr: #storeString has this format,
you really want to remove this method somewhen???
if yes, please change #storeString also to #newDay:"
self obsoleteMethodWarning:'use #year:month:day: (2014-09)'.
^ self year:year month:month day:day
"Modified (comment): / 16-07-2015 / 15:32:14 / sr"
!
day:dayInYear year:year
"return a new Date, given the year and the day-in-year (starting at 1).
Obsolete:
use newDay:year: for ST-80 compatibility"
<resource: #obsolete>
self obsoleteMethodWarning:'use #newDay:year: (2014-09)'.
^ self newDay:dayInYear year:year
!
isLeapYear:yearInteger
"Return true, if a year is a leap year.
Obsolete:
Please use the ST-80 compatible #leapYear for new programs,
since this method will vanish."
<resource:#obsolete>
self obsoleteMethodWarning:'use #leapYear: (2014-09)'.
^ self leapYear:yearInteger
!
newDay:day month:month year:year
"backward compatibility"
^ self year:year month:month day:day
!
readFrom:aStringOrStream printFormat:aSqueakFormatArrayOrFormatString
"OBSOLETE: kept for backward compatibility.
return a new Date, reading a printed representation from aStream.
aSqueakFormatArrayOrFormatString may either be a squeak formatArray
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or a formatString (see printing instance protocol)."
^ self
readFrom:aStringOrStream
format:aSqueakFormatArrayOrFormatString
"
Date readFrom:'19:11:1999' printFormat:#( 1 2 3 )
Date readFrom:'19-nov-1999' printFormat:#( 1 2 3 )
Date readFrom:'19:11:1999' printFormat:#( 2 1 3 ) -> exception: wrong month
Date readFrom:'5:12:1999' printFormat:#( 2 1 3 )
Date readFrom:'may-12-1999' printFormat:#( 2 1 3 )
Date readFrom:'1999 may 12' printFormat:#( 3 2 1 )
Date readFrom:'12/31/2001' printFormat:#( 2 1 3 )
Date readFrom:' 31.08.2001' printFormat:#( 1 2 3 )
Date readFrom:' 31.dec.2001' printFormat:#( 1 2 3 )
Date readFrom:' 31.Dec.2001' printFormat:#( 1 2 3 )
Date readFrom:' 31.dez.2001' printFormat:#( 1 2 3 )
Date readFrom:'31/12/01' printFormat:'%d %m %y' onError:'fail'
Date readFrom:'12/01' printFormat:'%m %y' onError:'fail'
Date readFrom:'01' printFormat:'%y' onError:'fail'
Date readFrom:'30.01' printFormat:'%d %m' onError:'fail'
"
"Created: 16.11.1995 / 22:50:17 / cg"
"Modified: 8.10.1996 / 19:25:39 / cg"
!
readFrom:aStringOrStream printFormat:aFormatStringOrSqueakFormatArray language:languageOrNil onError:exceptionBlock
"OBSOLETE: kept for backward compatibility
return a new Date, reading a printed representation from aStream.
aFormatStringOrSqueakFormatArray may either be a Squeak formatArray
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or an ST/X formatString (see printing instance protocol).
For now %d, %m, %monthName, %shortMonthName, %y, %y1900, %y2000, %y1950 and %y1980 are supported in the formatString.
y1900 converts 2-digit year YY into 19YY, y2000 into 20YY.
y1950 and y1980 are special; if the year is below 50/80, it is converted to 20YY, otherwise to 19YY.
The formatString can have any of these characters '-.:,;/' as separator.
The format may be preceeded by a single numeric length (as in %2d) to specify how many
characters to read.
The formatString can also use a space as separator (for ex. '%d %m %y') and any separator will be allowed.
However, when a character separator is defined, only that separator will be expected.
TODO: make this a general feature of all DateAndTime classes.
"
^ self readFrom:aStringOrStream format:aFormatStringOrSqueakFormatArray language:languageOrNil onError:exceptionBlock
"
Date readFrom:'31 December 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'19:11:1999' format:#(1 2 3) onError:'fail'
Date readFrom:'December, 5 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'3-jan-95' format:#(1 2 3) onError:'fail'
Date readFrom:'12/31/1992' format:#(1 2 3) onError:'fail'
Date readFrom:'15.4.1992' format:#(1 2 3) onError:'wrong date' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:'fail' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'32.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'fooBar' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10.4' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10041999' format:#(1 2 3) onError:['wrong date']
Date readFrom:'31/12/92' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:'%d %m %y' onError:'fail'
Date readFrom:'12/01' format:'%m %y' onError:'fail'
Date readFrom:'01' format:'%y' onError:'fail'
Date readFrom:'30.01' format:'%d %m' onError:'fail'
Date readFrom:'300180' format:'%2d%2m%2y' onError:'fail'
Date readFrom:'300170' format:'%2d%2m%2y' onError:'fail' - gives 2070 as year
Date readFrom:'300170' format:'%2d%2m%2(y1950)' onError:'fail' - gives 1970 as year
Date readFrom:'300170' format:'%2d%2m%2(y1980)' onError:'fail' - gives 2070 as year
Date readFrom:'300181' format:'%2d%2m%2(y1980)' onError:'fail' - gives 1981 as year
Date readFrom:'3-3-1995' format:'%d %m %y' language: #de onError:'fail'
Date readFrom:'3-März-1995' format:'%d %monthName %y' language: #de onError:'fail'
Date readFrom:'3-mär-1995' format:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3/mär/1995' format:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3/mär/1995' format:'%d-%shortMonthName-%y' language: #de onError:'fail'
Date readFrom:'3-dez-1995' format:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3-Dez-1995' format:'%d %shortMonthName %y' language: #de onError:'fail'
Date readFrom:'3-Dezember-1995' format:'%d %monthName %y' language: #de onError:'fail'
"
"Created: 16.11.1995 / 22:50:17 / cg"
"Modified: 8.10.1996 / 19:25:39 / cg"
!
readFrom:aStringOrStream printFormat:aSqueakFormatArrayOrFormatString onError:exceptionBlock
"return a new Date, reading a printed representation from aStream.
aSqueakFormatArrayOrFormatString may either be a Squeak formatArray
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
or an ST/X formatString (see printing instance protocol).
All of the %-formats as in the printString are supported here.
(i.e. %d, %m and %y, %shortMonthName and %monthName)
In addition, %y1900, %y2000, %y1950 and %y1980 are supported:
y1900 converts 2-digit year YY into 19YY, y2000 into 20YY.
y1950 and y1980 are special; if the year is below 50/80, it is converted to 20YY, otherwise to 19YY.
TODO: make this a general feature of all DateAndTime classes.
"
^ self readFrom:aStringOrStream format:aSqueakFormatArrayOrFormatString onError:exceptionBlock
"
Date readFrom:'31 December 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'19:11:1999' format:#(1 2 3) onError:'fail'
Date readFrom:'December, 5 1992' format:#(1 2 3) onError:'fail'
Date readFrom:'3-jan-95' format:#(1 2 3) onError:'fail'
Date readFrom:'12/31/1992' format:#(1 2 3) onError:'fail'
Date readFrom:'15.4.1992' format:#(1 2 3) onError:'wrong date' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:'fail' -> german
Date readFrom:'10.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'32.4.1992' format:#(1 2 3) onError:['wrong date']
Date readFrom:'fooBar' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10.4' format:#(1 2 3) onError:['wrong date']
Date readFrom:'10041999' format:#(1 2 3) onError:['wrong date']
Date readFrom:'31/12/92' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:#(1 2 3) onError:'fail'
Date readFrom:'31/12/01' format:'%d %m %y' onError:'fail'
Date readFrom:'12/01' format:'%m %y' onError:'fail'
Date readFrom:'01' format:'%y' onError:'fail'
Date readFrom:'30.01' format:'%d %m' onError:'fail'
Date readFrom:'311201' format:'%2d%2m%2y' onError:'fail'
"
"Created: 16.11.1995 / 22:50:17 / cg"
"Modified: 8.10.1996 / 19:25:39 / cg"
! !
!Date class methodsFor:'private'!
dayAbbrevsForLanguage:languageOrNilForDefault
<resource: #obsolete>
"return a collection of short day-names for a given language or the
current language if nil is given.
The returned strings depend on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, english names are returned"
^ self abbreviatedDayNamesForLanguage:languageOrNilForDefault
"
self dayAbbrevsForLanguage:#en
self dayAbbrevsForLanguage:#de
self dayAbbrevsForLanguage:#fr
self dayAbbrevsForLanguage:#es
self dayAbbrevsForLanguage:nil
self dayAbbrevsForLanguage:#zulu
"
"Modified (format): / 18-07-2011 / 09:34:14 / cg"
!
daysInMonthIndex: monthIndex forYear: yearInteger
"return the number of days in month monthIndex of
year yearInteger (modified GNU).
Return 0 for invalid month index.
This is the internal version of daysInMonth:forYear:"
|days|
(monthIndex between:1 and:12) ifFalse:[^ 0].
days := #(31 28 31 "Jan Feb Mar"
30 31 30 "Apr May Jun"
31 31 30 "Jul Aug Sep"
31 30 31 "Oct Nov Dec"
) at: monthIndex.
(monthIndex == 2) ifTrue:[
(self leapYear:yearInteger) ifTrue:[
^ days + 1
]
].
^ days
"
Date daysInMonthIndex:2 forYear:1994
Date daysInMonthIndex:2 forYear:1980
Date daysInMonthIndex:2 forYear:1981
"
!
daysUntilMonthIndex: monthIndex forYear: yearInteger
"return the number of days from 1st January up to month monthIndex of
year yearInteger (modified GNU).
Return 0 for invalid month index.
This is the internal version of dayInMonth:forYear:"
|days|
"
|sum|
sum := 0.
#(31 28 31
30 31 30
31 31 30
31 30 31
) collect:[:each | |first| first:= sum. sum := sum + each. first]
#(0 31 59 90 120 151 181 212 243 273 304 334)
"
(monthIndex between:1 and:12) ifFalse:[^ 0].
days := #(0 31 59 90 120 151 181 212 243 273 304 334) at: monthIndex.
(monthIndex > 2) ifTrue:[
(self leapYear:yearInteger) ifTrue:[
^ days + 1
]
].
^ days
"
Date daysUntilMonthIndex:3 forYear:1994
Date daysUntilMonthIndex:3 forYear:1980
Date daysUntilMonthIndex:3 forYear:1981
"
! !
!Date class methodsFor:'private-encoding/decoding'!
encodeYear:y month:m day:d
"the internal encoding is strictly private,
and should not be used outside."
"this encoding was chosen to be easily readable...
and also sortable"
^ (((y * 100) + m) * 100) + d
!
readDatePartFrom:str format:fmt language:languageOrNil
"read a single component (such as %shortName) from str"
|dayName monthName day month year format string dayOfYear|
format := fmt.
string := str throughAnyForWhich:[:ch | ch isNationalAlphaNumeric].
((format sameAs:'dayName') or:[format sameAs:'shortDayName']) ifTrue:[
"/ skipped, in case the format is 'monday, 23rd of may...' - not used for decoding
dayName := string.
^ nil.
].
((format sameAs:'d') or:[format sameAs:'day']) ifTrue:[
day := Integer readFrom:string.
^ #day -> day
].
((format sameAs:'m') or:[format sameAs:'month']) ifTrue:[
month := Integer readFrom:string.
^ #month -> month
].
(format sameAs:'monthName') ifTrue:[
monthName := string.
month := (self monthNamesForLanguage:languageOrNil) findFirst:[:m | monthName sameAs:m].
"/ month == 0 ifTrue:[self error:'invalid month name'].
^ #month -> month
].
(format sameAs:'shortMonthName') ifTrue:[
monthName := string.
month := (self abbreviatedMonthNamesForLanguage:languageOrNil) findFirst:[:m | monthName sameAs:m].
"/ month == 0 ifTrue:[self error:'invalid month name'].
^ #month -> month
].
(format sameAs: 'y1900') ifTrue:[
year := Integer readFrom:string.
year < 100 ifTrue:[
^ #year -> (year + 1900)
].
^ #year -> year
].
(format sameAs: 'y1950') ifTrue:[
"shift YY into 1950..2049; for 2k support of old date strings"
year := Integer readFrom:string.
year < 100 ifTrue:[
year < 50 ifTrue:[
^ #year -> (year + 2000)
].
^ #year -> (year + 1900)
].
^ #year -> year
].
(format sameAs: 'y1980') ifTrue:[
"shift YY into 1980..2079; for 2k support of old date strings"
year := Integer readFrom:string.
year < 100 ifTrue:[
year < 80 ifTrue:[
^ #year -> (year + 2000)
].
^ #year -> (year + 1900)
].
^ #year -> year
].
(format sameAs: 'y1970') ifTrue:[
"shift YY into 1970..2069; for 2k support of old date strings"
year := Integer readFrom:string.
year < 100 ifTrue:[
year < 70 ifTrue:[
^ #year -> (year + 2000)
].
^ #year -> (year + 1900)
].
^ #year -> year
].
(format = 'Y') ifTrue:[
"shift YY into 1970..2069; for 2k support of old date strings"
year := Integer readFrom:string.
year < 100 ifTrue:[
year < 70 ifTrue:[
^ #year -> (year + 2000)
].
^ #year -> (year + 1900)
].
^ #year -> year
].
((format = 'y') or:[format sameAs:'year']) ifTrue:[
year := Integer readFrom:string.
year < 100 ifTrue:[
^ #year -> (year + 2000)
].
^ #year -> year
].
(format sameAs:'dayOfYear') ifTrue:[
dayOfYear := Integer readFrom:string.
^ #dayOfYear -> dayOfYear
].
self error:'unknown format specifier: ',format
! !
!Date class methodsFor:'private-instance creation'!
fromOSTime:osTime
"return a date, representing the date given by the operatingSystem time.
This somewhat clumsy implementation hides the OS's date representation
(i.e. makes this class independent of what the OS starts its time values with).
Don't use this method, the osTime representation is totally unportable."
^ self basicNew fromOSTime:osTime
"
Date fromOSTime:0 -> on UNIX: this should return 1st Jan 1970
that's where Unix time starts
On other systems, it may be something different.
Date fromOSTime:(24*60*60*1000) -> on UNIX: the day after
"
! !
!Date methodsFor:'Compatibility-ANSI'!
dayOfWeek
"return the week-day of the receiver - 1 is sunday, 7 for saturday.
WARNING: different from dayInWeek (which returns 1 for monday, ... 7 for sunday).
"
|d|
d := self dayInWeek.
d == 7 ifTrue:[
^ 1
].
^ d + 1
"
Date today dayOfWeek
Date today dayInWeek
"
!
dayOfWeekAbbreviation
"return the short week-day of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'mon', 'tue' ..."
^ self abbreviatedDayName
"
Date today dayOfWeekAbbreviation
"
!
dayOfWeekName
"return the week-day of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'monday', 'tuesday' ..."
^ self weekday
"
Date today dayOfWeekName
Date today dayOfWeekAbbreviation
"
!
dayOfYear
"return the day-nr within the year of the receiver - 1..365/366"
^ self dayInYear
"
Date today dayOfYear
"
!
monthAbbreviation
"return the month of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'jan', 'feb' ..."
^ self abbreviatedMonthName
"
Date today monthAbbreviation
"
! !
!Date methodsFor:'Compatibility-ST80'!
firstDayInMonth
"Return the first day in the month of the receiver"
^ self subtractDays:(self dayOfMonth - 1)
"
Date today
Date today firstDayInMonth
Date today firstDayInMonth subtractDays:1
(Date today subtractDays:30) firstDayInMonth
(Date today subtractDays:122) firstDayInMonth
(Date today subtractDays:154) firstDayInMonth
"
!
lastDayInMonth
"Return the last day in the month in which the receiver is."
^ self addDays:(self daysInMonth - self day).
"
Date today
Date today lastDayInMonth
Date today lastDayInMonth addDays:1
"
!
next:dayName
"Return the next date whose weekday name is dayName.
Caveat; dayName is expected to be in the current language"
|ti ni|
ti := self weekdayIndex.
ni := (self class dayOfWeek:dayName).
^ self addDays:(ni > ti ifTrue:[ ni-ti ] ifFalse:[ 7+ni-ti ])
"
Date today
Date today next:#Friday
Date today next:#Sunday
Date today next:#Monday
Date today next:#Thursday
Date today next:#WednesDay
"
!
nextDayWithIndex:dayIndex
"Return the next date whose weekday name is dayName.
dayIndex is Monday=1, ... , Sunday=7"
|ti|
self assert:(dayIndex between:1 and:7).
ti := self weekdayIndex.
^ self addDays:(dayIndex > ti ifTrue:[ dayIndex-ti ] ifFalse:[ 7+dayIndex-ti ])
"
Date today
Date today nextDayWithIndex:5 - next Friday
Date today nextDayWithIndex:7
Date today nextDayWithIndex:1
Date today nextDayWithIndex:4
Date today nextDayWithIndex:3
"
!
previous:dayName
"Return the previous date whose weekday name is dayName.
Caveat; dayName is expected to be in the current language"
^ self previousDayWithIndex:(self class dayOfWeek:dayName).
"
Date today
Date today previous:#Montag
Date today previous:#Monday
Date today previous:#Friday
Date today previous:#Sunday
Date today previous:#Monday
Date today previous:#Thursday
Date today previous:#WednesDay
Date today previous:#TuesDay
"
!
previousDayWithIndex:dayIndex
"Return the previous date whose weekday name is dayIndex.
dayIndex is Monday=1, ... , Sunday=7"
|ti|
self assert:(dayIndex between:1 and:7).
ti := self weekdayIndex.
^ self subtractDays:(((ti - dayIndex - 1) \\ 7) + 1)
"
Date today
Date today previousDayWithIndex:1
Date today previousDayWithIndex:5
Date today previousDayWithIndex:7
Date today previousDayWithIndex:4
Date today previousDayWithIndex:3
Date today previousDayWithIndex:2
"
!
printFormat:aFormatArray
"Obsolete, backward ST-80 compatible formatted printing - see printStringFormat:
Return a string containing a printed representation of the receiver.
The formatArray argument consists of 6 or 7 integers which control
the resulting string. The entries are:
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
4 asciiValue of separator character or separator character
or collection of 2 separator characters
5 month format (1: numeric; 2: abbreviated name; 3: fullname
4: abbreviated uppercase 5: full uppercase)
6 year format (1 include century; 2 exclude century)
7 (optional) true/false.
if true, print numbers in 2-digit format
(i.e. with leading zeros);
Taken as false, if omited
Day and monthnames are in the currently active language.
This method supports more options than the ST-80 version; month formats
4 and 5, non-numeric separators and the optional 7th parameter are not
supported by ST-80. Be aware of this for compatibility reasons.
Notice that not all formats can be scanned (correctly) by #readFrom:
This is an ST-80 compatibility method - I would have choosen another
(less cryptic) formatString ...
"
^ self printFormat:aFormatArray forLanguage:nil
"
Date today printFormat:#(1 2 3 '' 1 2)
Date today printFormat:#(1 2 3 $- 1 2)
Date today printFormat:#(1 2 3 $. 1 2 true)
Date today printFormat:#(2 1 3 32 3 1)
Date today printFormat:#(2 1 3 #(' ' ', ') 3 1)
Date today printFormat:#(1 2 3 $- 2 1)
Date today printFormat:#(1 2 3 $- 4 1)
"
"Modified (comment): / 17-05-2017 / 16:16:05 / mawalch"
!
printFormat:aFormatArray forLanguage:languageOrNil
"Obsolete, backward ST-80 compatible formatted printing - see printStringFormat:
Return a string containing a printed representation of the receiver.
The formatArray argument consists of 6 or 7 integers which control
the resulting string. The entries are:
1 day position (1, 2 or 3)
2 month position (1..3)
3 year position (1..3)
4 asciiValue of separator character or separator character
or collection of 2 separator characters
5 month format (1: numeric; 2: abbreviated name; 3: fullname
4: abbreviated uppercase 5: full uppercase)
6 year format (1 include century; 2 exclude century)
7 (optional) true/false.
if true, print numbers in 2-digit format
(i.e. with leading zeros);
Taken as false, if omited
Day and monthnames are in the currently active language.
This method supports more options than the ST-80 version; month formats
4 and 5, non-numeric separators and the optional 7th parameter are not
supported by ST-80. Be aware of this for compatibility reasons.
Notice that not all formats can be scanned (correctly) by #readFrom:
This is an ST-80 compatibility method - I would have choosen another
(less cryptic) formatString ...
"
|mf upperCase day month year components sep1 sep2 leadingZeros|
aFormatArray size > 6 ifTrue:[
leadingZeros := aFormatArray at:7
] ifFalse:[
leadingZeros := false.
].
components := Array new:3.
day := self day.
leadingZeros ifTrue:[
day := day printStringLeftPaddedTo:2 with:$0
] ifFalse:[
day := day printString
].
components at:(aFormatArray at:1) put:day.
upperCase := false.
mf := aFormatArray at:5.
(mf between:4 and:5) ifTrue:[mf := mf - 2. upperCase := true].
mf == 1 ifTrue:[
month := self month.
leadingZeros ifTrue:[
month := month printStringLeftPaddedTo:2 with:$0
] ifFalse:[
month := month printString
]
] ifFalse:[
mf == 2 ifTrue:[
month := self abbreviatedMonthNameForLanguage:languageOrNil
] ifFalse:[
month := self monthNameForLanguage:languageOrNil
]
].
upperCase ifTrue:[month := month asUppercase].
components at:(aFormatArray at:2) put:month.
year := self year.
(aFormatArray at:6) == 2 ifTrue:[
year := year \\ 100.
year := year printStringLeftPaddedTo:2 with:$0
].
year := year printString.
components at:(aFormatArray at:3) put:year.
sep1 := sep2 := (aFormatArray at:4).
sep1 isString ifFalse:[
sep1 isCollection ifTrue:[
sep2 := (sep1 at:2).
sep1 := (sep1 at:1).
] ifFalse:[
sep1 := sep2 := sep1 asCharacter
]
].
^ (components at:1)
, sep1 asString
, (components at:2)
, sep2 asString
, (components at:3)
"
Date today printFormat:#(1 2 3 '' 1 2)
Date today printFormat:#(1 2 3 $- 1 2)
Date today printFormat:#(1 2 3 $. 1 2 true)
Date today printFormat:#(2 1 3 32 3 1)
Date today printFormat:#(2 1 3 #(' ' ', ') 3 1)
Date today printFormat:#(1 2 3 $- 2 1) forLanguage:#en
Date today printFormat:#(1 2 3 $- 4 1) forLanguage:#en
"
"Modified (comment): / 17-05-2017 / 16:18:55 / mawalch"
!
printFormat:aFormatArray forLanguage:languageOrNil on:aStream
"Obsolete, backward ST-80 compatible formatted printing - see comment
in printFormat:.
Append a printed representation of the receiver to aStream.
The argument, aFormatString controls the format, as described
in the #printFormat: method.
Notice that not all formats can be scanned (correctly) by #readFrom:"
aStream nextPutAll:(self printFormat:aFormatArray forLanguage:languageOrNil)
"european formats:
Date today printFormat:#(1 2 3 $- 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 3 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $. 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $. 1 2 true) on:Transcript. Transcript cr.
US formats:
Date today printFormat:#(2 1 3 32 3 1) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 32 2 2) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 $/ 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 #(' ' ', ') 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 4 1) on:Transcript. Transcript cr.
"
!
printFormat:aFormatArray on:aStream
"Obsolete, backward ST-80 compatible formatted printing - see comment
in printFormat:.
Append a printed representation of the receiver to aStream.
The argument, aFormatString controls the format, as described
in the #printFormat: method.
Notice that not all formats can be scanned (correctly) by #readFrom:"
aStream nextPutAll:(self printFormat:aFormatArray)
"european formats:
Date today printFormat:#(1 2 3 $- 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 3 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $. 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $. 1 2 true) on:Transcript. Transcript cr.
US formats:
Date today printFormat:#(2 1 3 32 3 1) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 32 2 2) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 $/ 1 2) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(2 1 3 #(' ' ', ') 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 2 1) on:Transcript. Transcript cr.
Date today printFormat:#(1 2 3 $- 4 1) on:Transcript. Transcript cr.
"
!
shortPrintString
"dummy - for now"
^ self printString
"Created: 20.6.1997 / 17:16:48 / cg"
!
weekdayIndex
"Return the day index; Monday=1, ... , Sunday=7"
^ (self asDays + 1) \\ 7 + 1 "1 January 1901 was a Tuesday"
"
Date today dayName
Date today weekdayIndex
"
! !
!Date methodsFor:'Compatibility-Squeak'!
mmddyyyy
"return a printed representation of the receiver in the
form mmddyyyy.
The receiver can be reconstructed with:
Date readMMDDYYYYFrom:aStringOrStream onError:[...]"
^ self printStringFormat:'%m%d%y'
"/ ^ (self month printStringLeftPaddedTo:2 with:$0)
"/ , (self day printStringLeftPaddedTo:2 with:$0)
"/ , (self year printStringLeftPaddedTo:4 with:$0)
"
Date today mmddyyyy
"
! !
!Date methodsFor:'accessing'!
abbreviatedDayName
"return the short week-day-name of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'mon', 'tue' ..."
^ self class abbreviatedNameOfDay:(self dayInWeek)
"
Date today abbreviatedDayName
(Date newDay:15 month:4 year:1959) abbreviatedDayName
"
!
abbreviatedDayNameForLanguage:lang
"return the short week-day-name of the receiver as a string.
The returned string depends on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, the english name is returned.
Expect things like 'mon', 'tue' ..."
^ self class abbreviatedNameOfDay:(self dayInWeek) language:lang
"
Date today abbreviatedDayNameForLanguage:#en
Date today abbreviatedDayNameForLanguage:#de
Date today abbreviatedDayNameForLanguage:#zulu
(Date newDay:15 month:4 year:1959) abbreviatedDayName
"
!
abbreviatedMonthName
"return the short month name of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'jan', 'feb' ..."
^ self class abbreviatedNameOfMonth:(self month)
"
Date today abbreviatedMonthName
(Date newDay:15 month:4 year:1959) abbreviatedMonthName
"
!
abbreviatedMonthNameForLanguage:lang
"return the short month-name of the receiver as a string in a given language.
The returned string depends on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, the english name is returned.
Expect things like 'jan', 'feb' ..."
^ self class abbreviatedNameOfMonth:(self month) language:lang
"
Date today abbreviatedMonthNameForLanguage:#en
Date today abbreviatedMonthNameForLanguage:#de
Date today abbreviatedMonthNameForLanguage:#zulu
"
!
additionalPicoseconds
"for protocol compatibility"
^ 0
"
Date today > Timestamp now
Timestamp now > Date today
"
"Created: / 04-06-2018 / 09:58:11 / Claus Gittinger"
!
asDays
"return the number of days elapsed since 01-Jan-1901
and the receiver's day; starts with 0 for 1-1-1901.
Date>>fromDays: is the reverse operation.
Notice,
that this represents dates before 1901 as negative values!!
For GNU/ST-80 compatibility."
|yr|
yr := self year.
^ (self class yearAsDays:yr)
+ (self class daysUntilMonthIndex:self month forYear:yr)
+ self day
- 1
"
(Date newDay: 5 month: 8 year: 1962) asDays -> should be 22496
(Date newDay: 1 month: 1 year: 1901) asDays -> 0
(Date newDay: 31 month: 12 year: 1900) asDays -> -1
(Date newDay: 1 month: 1 year: 1800) asDays -> -36889
Date today asDays
Date fromDays:(Date today asDays + 7)
"
!
asDaysFrom0
"return the number of days elapsed since 01-Jan-0
and the receiver's day; starts with 0 for 1-1-0.
Date>>fromDaysFrom0: is the reverse operation.
Notice, that this is not able to represent dates before 0!!."
|yr|
yr := self year.
^ (self class yearAsDaysFrom0:yr)
+ (self class daysUntilMonthIndex:self month forYear:yr)
+ self day
- 1
"
(Date newDay: 1 month: 1 year: 0) asDaysFrom0 -> should be 0
(Date newDay: 1 month: 1 year: 1) asDaysFrom0 -> should be 366
Date fromDaysFrom0:(Date today asDaysFrom0 + 7)
"
!
asSeconds
"return the seconds between 1.jan.1901 and the same time in the receiver's
day. (i.e. midnight to midnight). The returned number may be negative for dates before 1901.
This does not include any leapSeconds ... strictly speaking, this is incorrect.
ST-80 compatibility."
^ 60*60*24 * self asDays
"
(Date newDay: 5 month: 8 year: 1962) asSeconds
(Date newDay: 1 month: 1 year: 1901) asSeconds
(Date newDay: 1 month: 1 year: 1700) asSeconds
(Date today addDays:7) asSeconds - Date today asSeconds
"
"Modified: 1.7.1996 / 14:19:17 / cg"
!
day
"return the day (1..31) of the receiver"
^ dateEncoding \\ 100
"example:
Date today day
"
!
dayInWeek
"return the week-day of the receiver - 1 for monday, 7 for sunday.
WARNING: different from (american) dayOfWeek (which returns 1 for sunday, ... 7 for saturday).
WARNING: does not care for pre-gregorian dates
(i.e. do not use this for dates before 1583)
"
|wday|
wday := self asDaysFrom0 \\ 7 - 1.
"/ wday := (1 "knowing, that 1st Jan 1901 was a tuesday"
"/ + self asDays) \\ 7 + 1.
wday < 1 ifTrue:[
wday := wday + 7
].
^ wday
"
Date today dayInWeek
Date tomorrow dayInWeek
Date yesterday dayInWeek
(Date today subtractDays:2) dayInWeek
Date today weekday
Date tomorrow weekday
Date yesterday weekday
(Date newDay:15 month:4 year:1959) dayInWeek
(Date newDay:1 month:1 year:1901) dayInWeek
(Date newDay:31 month:12 year:1900) dayInWeek
(Date newDay:31 month:12 year:1899) dayInWeek
Date today dayInWeek
Date today dayOfWeek
"
"Modified: / 1.2.1998 / 14:10:27 / cg"
!
dayInYear
"return the day-nr within the year of the receiver - 1 .. 365/366"
"
|daysSoFar|
daysSoFar := 0.
#(0 31 28 31 30 31 30 31 31 30 31 30) collect:[:i| daysSoFar := daysSoFar + i]
"
|days month|
month := self month.
days := #(0 31 59 90 120 151 181 212 243 273 304 334) at:month.
days := days + self day.
(month > 2 and:[self class leapYear:self year]) ifTrue:[
days := days + 1.
].
^ days
"
Date today dayInYear
(Date newDay:1 year:1999) dayInYear
(Date newDay:1 year:2000) dayInYear
(Date newDay:2 year:2000) dayInYear
(Date newDay:59 year:2004) dayInYear
(Date newDay:60 year:2004) dayInYear
(Date newDay:61 year:2004) dayInYear
(Date newDay:366 year:2004) dayInYear
(Date newDay:59 year:2005) dayInYear
(Date newDay:60 year:2005) dayInYear
(Date newDay:365 year:2005) dayInYear
"
!
dayOfMonth
"Answer the day of the month represented by me.
Same as day; for ST-80 compatibility."
^ self day
"
Date today dayOfMonth
"
!
daysInMonth
"return the number of days in the month of the receiver"
^ self class daysInMonth:(self month) forYear:(self year)
"
Date today daysInMonth
"
!
daysInYear
"return the number of days in the year of the receiver"
^ self class daysInYear:(self year)
"
Date today daysInYear
"
!
daysLeftInMonth
"return the number of days left in the month of the receiver"
^ self daysInMonth - self day
"
Date today daysLeftInMonth
"
!
daysLeftInYear
"return the number of days left in the year of the receiver.
Today is excluded from the count (i.e. in a non-leap-year,
the first january will return 364)"
^ (self class daysInYear:(self year)) - self dayOfYear
"
Date today daysLeftInYear
"
!
isLeapYear
"return true, if the receiver's year is a leap year"
^ self class leapYear:self year
"
Date today isLeapYear
(Date newDay:1 month:1 year:1992) isLeapYear
"
!
month
"return the month (1..12) of the receiver"
^ (dateEncoding // 100) \\ 100
"
Date today month
"
!
monthIndex
"return the index of the month (e.g. Feb.=2).
Same as month; for ST-80 compatibility."
^ self month
!
monthName
"return the month of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'january', 'february' ..."
^ self class nameOfMonth:(self month)
"
Date today monthName
(Date newDay:15 month:4 year:1959) monthName
"
!
monthNameForLanguage:languageOrNil
"return the month-name of the receiver as a string in a given language.
The returned string depends on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, the english name is returned.
Expect things like 'january', 'february' ..."
^ self class nameOfMonth:(self month) language:languageOrNil
"
Date today monthName
Date today monthNameForLanguage:#en
Date today monthNameForLanguage:#de
Date today monthNameForLanguage:#zulu
"
!
weekInYear
"return the week number of the receiver - 1 for Jan, 1st.
each week is Mon .. Sun (i.e. Sunday belongs to the previous week)"
^ self class weekInYearOf:self
"
Date today weekInYear
(Date newDay:1 year:2000) weekInYear was a saturday
(Date newDay:2 year:2000) weekInYear was a sunday
(Date newDay:3 year:2000) weekInYear was a monday
(Date newDay:4 year:2000) weekInYear was a tuesday
(Date newDay:5 year:2000) weekInYear was a wed
(Date newDay:6 year:2000) weekInYear was a thursday
(Date newDay:7 year:2000) weekInYear was a fri
(Date newDay:8 year:2000) weekInYear was a sat
(Date newDay:9 year:2000) weekInYear was a sun
(Date newDay:10 year:2000) weekInYear was a monday
(Date newDay:3 month:1 year:2001) weekInYear
"
!
weekday
"return the week-day of the receiver as a string.
The returned string depends on the current language setting.
Expect things like 'monday', 'tuesday' ...
For ST-80 compatibility"
^ self class nameOfDay:(self dayInWeek)
"
Date today weekday
(Date newDay:15 month:4 year:1959) weekday
"
!
weekdayForLanguage:lang
"return the week-day-name of the receiver as a string in a given language.
The returned string depends on the resource translation file to be present for the
given language (i.e. libbasic/resources(<lang>.rs).
If not, the english name is returned.
Expect things like 'monday', 'tuesday'..."
^ self class nameOfDay:(self dayInWeek) language:lang
"
Date today weekdayForLanguage:#de -> Mittwoch
Date today weekdayForLanguage:#en -> wednesday
Date today weekdayForLanguage:#zulu -> wednesday
(Date newDay:15 month:4 year:1959) weekdayForLanguage:#de
(Date newDay:15 month:4 year:1959) weekdayForLanguage:#en
(Date newDay:15 month:4 year:1959) weekdayForLanguage:#zulu
"
!
year
"return the year of the receiver"
^ dateEncoding // (100*100)
"
Date today year
Date today subtractDays:(1000 * 365)
Date today addDays:(1000 * 365)
"
!
year:year month:month day:day
dateEncoding := self class encodeYear:year month:month day:day
! !
!Date methodsFor:'arithmetic'!
+ days
"return a new date representing 'days' after the receiver.
The argument should be some kind of integer.
This is the same as #addDays."
^ self class fromDaysFrom0:(self asDaysFrom0 + days)
"
Date today + 7.
Date today to:(Date today + 28) by:7 do:[:date|
Transcript show:date weekday; show:', '; showCr:date
].
"
!
- aDateOrNumberOfDaysOrTimeDuration
"return the delta in days (anInteger) between 2 dates or
subtract a number of days from a date returning a Date"
aDateOrNumberOfDaysOrTimeDuration class == self class ifTrue:[
^ self asDaysFrom0 - aDateOrNumberOfDaysOrTimeDuration asDaysFrom0
].
aDateOrNumberOfDaysOrTimeDuration isTimeDuration ifTrue:[
^ self asTimestamp - aDateOrNumberOfDaysOrTimeDuration
].
^ self class fromDaysFrom0:(self asDaysFrom0 - aDateOrNumberOfDaysOrTimeDuration asInteger)
"
Date today - Date yesterday
Date today - 3
Date today + 3
"
"Modified: / 08-05-2019 / 12:01:47 / Claus Gittinger"
!
addDays:days
"return a new date representing 'days' after the receiver.
The argument should be some kind of integer.
For ST-80 compatibility."
^ self class fromDaysFrom0:(self asDaysFrom0 + days)
"
Date today addDays:7
"
!
addMonths:numberOfMonths
"Return a new instance which added numberOfMonths to self months.
Keep the day of month if possible.
If the month of the new instance has fewer days than self dayOfMonth set the day to the last
day of the new instance's month.
Does (probably) not work correct for resulting dates before calendar reform."
|yearToAdd years monthsInYear tempDate newMonth newMonthAsDate|
yearToAdd := 0.
years := numberOfMonths // 12.
monthsInYear := numberOfMonths \\ 12.
tempDate := self addYears:years.
newMonth := tempDate month + monthsInYear.
(newMonth between:1 and:12) ifFalse:[
newMonth := newMonth \\ 12.
yearToAdd := 1.
].
newMonthAsDate := self class
year:(tempDate year + yearToAdd)
month:newMonth
day:1.
^ self class
year:(tempDate year + yearToAdd)
month:newMonth
day:(newMonthAsDate daysInMonth min:tempDate day)
"Created: / 23-08-2012 / 11:04:17 / sr"
"Created: / 24-08-2012 / 12:14:52 / anwild"
!
addMonthsUsingEncoding:numberOfMonths
"Return a new instance which added numberOfMonths to self months.
Keep the day of month if possible.
If the month of the new instance has fewer days than self dayOfMonth,
set the day to the last day of the new instance's month.
Does (probably) not work correct for resulting dates before calendar reform."
| newEncoding |
newEncoding := dateEncoding
+ ((numberOfMonths + self month) // 12 * 10000) "the new year"
+ ((((numberOfMonths \\ 12) + self month) \\ 12) * 100) "the new month"
- (self month * 100) "in the line above the new month is already completely calculated. So subtract the current month"
- self day "in the line below the new day is already completely calculated. So subtract the current day"
+ (self day min: self daysInMonth). "the new day considering the maximum number of days in the new month."
^ self class
year: newEncoding // 10000
month: (newEncoding // 100 \\ 100)
day: newEncoding \\ 100.
"Created: / 24-08-2012 / 15:18:44 / anwild"
!
addYears:numberOfYears
"Return a new instance which is the same date, but numberOfYears ahead of self.
Cares about leap years.
I.e. goes from a leap year's 29.feb to a non-leap year's 28.feb."
|newYear newDay newMonth|
newYear := self year + numberOfYears.
newDay := self day.
newMonth := self month.
"/ special care for the 29th of February in a leapYear
(newDay = 29 and:[newMonth == 2]) ifTrue:[
(self class leapYear:newYear) ifFalse: [
newDay := 28.
].
].
^ self class
year:newYear
month:newMonth
day:newDay
"Created: / 23-08-2012 / 11:05:04 / sr"
"Created: / 24-08-2012 / 12:14:09 / anwild"
!
daysSince:aDate
"return the number of days between the receiver and the argument,
aDate, which should be some kind of date"
^ self asDaysFrom0 - aDate asDaysFrom0
"
Date today daysSince:(Date newDay:1 month:1 year:1901)
"
!
daysUntil:aDate
"return the number of days between the receiver and the argument,
aDate, which should be some kind of date"
^ aDate asDaysFrom0 - self asDaysFrom0
"
(Date newDay:24 month:12 year:1994) daysUntil:(Date day:1 month:1 year:1995)
(Date newDay:1 month:2 year:1992) daysUntil:(Date day:1 month:3 year:1992)
(Date newDay:1 month:2 year:1994) daysUntil:(Date day:1 month:3 year:1994)
|delta|
delta := Date today
daysUntil:(Date newDay:25 month:12 year:Date today year).
Transcript show:'still ';
show:delta ;
showCR:' days till xmas'
"
!
firstDayInPreviousMonth:nMonths
"Return the first day of a previous month (0=this month, 1=prev. month, etc.).
CG: there are two such methods - which one is obsolete?"
^ self firstDayOfPreviousMonth:nMonths
"
(Date newDay:3 month:6 year:2009) firstDayInMonth
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:0
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:5
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:6
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:7
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:17
(Date newDay:3 month:6 year:2009) firstDayInPreviousMonth:18
"
!
firstDayOfPreviousMonth:nMonths
"Return the first day of a previous month (0=this month).
CG: there are two such methods - which one is obsolete? (see firstDayInPreviousMonth:)"
|month year monthNegated|
month := self month.
year := self year.
month := month - nMonths.
month < 1 ifTrue:[
monthNegated := month negated.
year := year - 1 - (monthNegated // 12).
month := (12 - (monthNegated \\ 12)).
].
^ self class year:year month:month day:1.
"
(Date newDay:3 month:6 year:2009) firstDayInMonth
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:0
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:5
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:6
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:7
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:17
(Date newDay:3 month:6 year:2009) firstDayOfPreviousMonth:18
"
!
subtractDate:aDate
"return the number of days between the receiver and aDate"
^ self asDaysFrom0 - aDate asDaysFrom0
"
(Date newDay:1 month:1 year:1995) subtractDate:(Date newDay:24 month:12 year:1994)
(Date newDay:1 month:3 year:1992) subtractDate:(Date newDay:1 month:2 year:1992)
(Date newDay:1 month:3 year:1994) subtractDate:(Date newDay:1 month:2 year:1994)
"
!
subtractDays:days
"return a new date representing 'days' before the receiver.
The argument should be some kind of integer.
For ST-80 compatibility"
^ self class fromDaysFrom0:(self asDaysFrom0 - days)
"
Date today subtractDays:7
"
! !
!Date methodsFor:'comparing'!
< aDate
"return true, if the date represented by the receiver
is before the argument, aDate.
If compared against a timestamp, the receiver is treated like 00:00:00 midnight"
"/ quick check, if it is another Date; then we can tune this operation,
"/ by not having to compute the osTime
(aDate isMemberOf:Date) ifTrue:[
^ dateEncoding < aDate dateEncoding
].
"/ the argument must understand year, month and day to be
"/ comparable, whatever it is
^ dateEncoding < (self class encodeYear:aDate year month:aDate month day:aDate day)
"
Date today < (Date day:24 month:12 year:2000)
Date today < (Date day:24 month:12 year:1900)
Date today < Timestamp now
Date today-1 < Timestamp now
"
"Modified (comment): / 04-06-2018 / 09:58:51 / Claus Gittinger"
!
= aDate
"return true, if the date represented by the receiver
is the same as the one represented by argument, aDate.
If compared against a timestamp, the receiver is treated like 00:00:00 midnight"
"/ must have same class and same osTime
(aDate isMemberOf:Date) ifFalse:[^ false].
^ dateEncoding = aDate dateEncoding
"the argument must understand year, month and day to be
comparable, whatever it is"
"
^ dateEncoding = (Date encodeYear:aDate year
month:aDate month
day:aDate day)
"
"Date today = ((Date today plusDays:7) minusDays:7)"
"Modified (comment): / 04-06-2018 / 09:58:57 / Claus Gittinger"
!
> aDate
"return true, if the date represented by the receiver
is after the argument, aDate.
If compared against a timestamp, the receiver is treated like 00:00:00 midnight"
"/ quick check, if it is another Date; then we can tune this operation,
"/ by not having to compute the osTime
(aDate isMemberOf:Date) ifTrue:[
^ dateEncoding > aDate dateEncoding
].
"/ the argument must understand year, month and day,
"/ to be comparable, whatever it is
^ dateEncoding > (self class encodeYear:aDate year month:aDate month day:aDate day)
"
Date today > (Date newDay:24 month:12 year:2099)
Date today > (Date newDay:24 month:12 year:1900)
Date today > Timestamp now
Date today+1 > Timestamp now
"
"Modified (comment): / 04-06-2018 / 09:59:02 / Claus Gittinger"
!
hash
"return an integer useful for hashing on dates"
^ dateEncoding
! !
!Date methodsFor:'converting'!
asDate
"return the receiver"
^ self
!
asLocalTimestamp
"return an TimeStamp instance, representing midnight of last night"
^ Timestamp
year:(self year) month:(self month) day:(self day)
hour:0 minute:0 second:0 millisecond:0
"
Date today asLocalTimestamp
"
!
asTimestamp
"return an Timestamp instance, representing midnight of last night"
^ self asLocalTimestamp
"
Date today asTimestamp
"
"Modified (comment): / 27-07-2018 / 11:09:49 / Stefan Vogel"
!
asUtcTimestamp
"return an UtcTimestamp instance, representing midnight of last night"
^ UtcTimestamp
year:(self year) month:(self month) day:(self day)
hour:0 minute:0 second:0 millisecond:0
"
Date today asUtcTimestamp
"
! !
!Date methodsFor:'obsolete'!
asAbsoluteTime
"deprecated, use #asTimestamp"
<resource:#obsolete>
self obsoleteMethodWarning:'use #asTimestamp'.
^ self asTimestamp
!
dayCount
"return the number of days since 1st. Jan. 1901;
starting with 0 for this date.
Date>>fromDays: is the reverse operation.
Obsolete:
please use asDays for ST-80 compatibility"
<resource:#obsolete>
^ self asDays.
!
dayName
"return the week-day of the receiver as a string.
The returned string depends on the language setting.
Expect things like 'monday', 'tuesday' ...
Obsolete:
use #weekday for ST-80 compatibility"
<resource:#obsolete>
^ self weekday
!
leap
"return true, if the receiver's year is a leap year"
<resource: #obsolete>
^ self isLeapYear
"
Date today leap
(Date newDay:1 month:1 year:1992) leap
"
!
minusDays:days
"return a new date representing 'days' before the receiver.
The argument should be some kind of integer.
Obsolete:
Please don't use this method since it will vanish.
Use #subtractDays: instead for ST-80 compatibility."
<resource: #obsolete>
self obsoleteMethodWarning:'use #substractDays:'.
^ self subtractDays:days
!
plusDays:days
"return a new date representing 'days' after the receiver.
The argument should be some kind of integer.
Obsolete:
Please don't use this method since it will vanish.
Use #addDays: instead for ST-80 compatibility."
<resource: #obsolete>
self obsoleteMethodWarning:'use #addDays:'.
^ self addDays:days
! !
!Date methodsFor:'printing & storing'!
addPrintBindingsTo:aDictionary
"see comment in addPrintBindingsTo:language:"
self addPrintBindingsTo:aDictionary language:nil.
!
addPrintBindingsTo:aDictionary language:languageOrNil
"private print support: add bindings for printing to aDictionary.
languageOrNil can only be #en or nil for the current language setting (Smalltalk language).
valid format items are:
%d - day, 01..31 0-padded to length 2
%m - month, 01..12 0-padded to length 2
%w - week in year, 00..53 0-padded to length 2
%y - year, full i.e. '1999', '2004'
special:
%D - day - unpadded
%M - month - unpadded
%W - week in year - unpadded
%Y - year, last 2 digits only i.e. 1999->'99', 1904->'04', 2004->'04'
(danger: year 2k bug)
makes any date a 2-digit value.
Only use to process/generate old (backward compatible) datasets
which were generated way before y2k, and the old (bad) values need to
be regenerated.
%Y1900 - year, last 2 digits of 19YY i.e. 1999->'99', 1904->'04', 2004->error
(danger: year 2k bug)
raises an error, if the year is not in 1900..1999
Only use to process/generate old (backward compatible) datasets
which were generated way before y2k, and the old (bad) values need to
be regenerated. Same as above, but with error reporting
%Y2000 - year, last 2 digits of 20YY only i.e. 2001->'01', 2004->'04' 2099->'99'
raises an error, if the year is not in 2000..2099
%Y1950 - year, last 2 digits of 19YY or 20YY only i.e. 2001->'01', 2049->'49', 1950->'50', 1999->'99'
raises an error, if the year is not in 1950..2049.
this is occasionally used to get old (pre y2k) data converted.
%Y1980 - year, last 2 digits of 19YY or 20YY only i.e. 2001->'01', 2079->'79, 1999->'99'
same as above, with boundary year at 1980
raises an error, if the year is not in 1980..2079
this is occasionally used to get old (pre y2k) data converted.
%Y1970 - same as above, with boundary year at 1970.
raises an error, if the year is not in 1970..2069
%(weekDay) - day in week (1->monday, 2->tuesday, ... ,7->sunday)
%(dayOfYear) - day in year (1..365/366)
%(dayName) - full day name
%(DayName) - full day name, first character uppercase
%(DAYNAME) - full day name, all uppercase
%(monthName) - full month name
%(MonthName) - full month name, first character uppercase
%(MONTHNAME) - full month name, all uppercase
%(shortDayName) - short (abbreviated) day name
%(ShortDayName) - short (abbreviated) day name, first character uppercase
%(SHORTDAYNAME) - short (abbreviated) day name, all uppercase
%(shortMonthName) - short (abbreviated) month name
%(ShortMonthName) - short (abbreviated) month name, first character uppercase
%(SHORTMONTHNAME) - short (abbreviated) month name, all uppercase
%(nth) - counting day-in-month (1->'st'; 2->'nd'; 3->'rd'; 4...->'th')
%(weekDayNth) - counting day-in-week (1->'st'; 2->'nd'; 3->'rd'; 4...->'th')
%(weekNth) - counting week-in-year (1->'st'; 2->'nd'; 3->'rd'; 4...->'th')
%(yearRoman) - year, in roman letters
%(monthRoman) - month, in roman letters"
|day ds dsPadded0 dsPaddedB month ms msPadded0 msPaddedB
year weekInYear monthName shortMonthName
dayInWeek dayOfWeek dayName dayOfYear shortDayName ws wsPadded0
conv|
aDictionary at:#'iso8601' put:[ self printStringIso8601 ].
aDictionary at:#'iso8601_compact' put:[ self printStringIso8601Compressed ].
day := self day.
ds := day printString.
dsPaddedB := day printStringLeftPaddedTo:2.
dsPadded0 := day printStringLeftPaddedTo:2 with:$0.
month := self month.
ms := month printString.
msPaddedB := month printStringLeftPaddedTo:2.
msPadded0 := month printStringLeftPaddedTo:2 with:$0.
year := self year.
weekInYear := self weekInYear.
ws := weekInYear printString.
wsPadded0 := weekInYear printStringLeftPaddedTo:2 with:$0.
dayInWeek := self dayInWeek. "/ 1 .. 7
dayOfWeek := self dayOfWeek. "/ 0 .. 6
dayOfYear := self dayOfYear. "/ 0 .. 6
monthName := self class nameOfMonth:(self month) language:languageOrNil.
dayName := self class nameOfDay:dayInWeek language:languageOrNil.
aDictionary at:#day put:dsPadded0. "/ 0-padded
aDictionary at:#daypadded put:dsPaddedB. "/ Blank-padded
aDictionary at:#dayPadded put:dsPaddedB. "/ Blank-padded
aDictionary at:#Day put:ds. "/ unpadded
aDictionary at:#month put:msPadded0. "/ 0-padded
aDictionary at:#monthPadded put:msPaddedB. "/ Blank-padded
aDictionary at:#monthpadded put:msPaddedB. "/ Blank-padded
aDictionary at:#Month put:ms. "/ unpadded
aDictionary at:#mon put:msPadded0. "/ 0-padded - for backward compatibility only
aDictionary at:#Mon put:ms. "/ unpadded - for backward compatibility only
aDictionary at:#year put:year. "/ padded
aDictionary at:#week put:wsPadded0.
aDictionary at:#Week put:ws.
year ~~ self class today year ifTrue:[
aDictionary at:#yearOrTime put:(' ' , year printString).
].
aDictionary at:$d put:dsPadded0.
aDictionary at:$D put:ds.
aDictionary at:$m put:msPadded0.
aDictionary at:$M put:ms.
aDictionary at:$y put:year.
aDictionary at:$Y put:[ (year \\ 100) printStringLeftPaddedTo:2 with:$0 ].
conv :=
[
(year between:1950 and:2049) ifFalse:[
self error:'year cannot be represented'
].
(year between:1950 and:1999) ifTrue:[
(year - 1900) printStringLeftPaddedTo:2 with:$0
] ifFalse:[
(year - 2000) printStringLeftPaddedTo:2 with:$0
]
].
aDictionary at:#Y1950 put:conv.
aDictionary at:#y1950 put:conv.
conv :=
[
(year between:1980 and:2079) ifFalse:[
self error:'year cannot be represented'
].
(year between:1980 and:1999) ifTrue:[
(year - 1900) printStringLeftPaddedTo:2 with:$0
] ifFalse:[
(year - 2000) printStringLeftPaddedTo:2 with:$0
]
].
aDictionary at:#Y1980 put:conv.
aDictionary at:#y1980 put:conv.
conv :=
[
(year between:1970 and:2069) ifFalse:[
self error:'year cannot be represented'
].
(year between:1970 and:1999) ifTrue:[
(year - 1900) printStringLeftPaddedTo:2 with:$0
] ifFalse:[
(year - 2000) printStringLeftPaddedTo:2 with:$0
]
].
aDictionary at:#Y1970 put:conv.
aDictionary at:#y1970 put:conv.
conv :=
[
(year between:2000 and:2099) ifFalse:[
self error:'year cannot be represented'
].
(year - 2000) printStringLeftPaddedTo:2 with:$0
].
aDictionary at:#Y2000 put:conv.
aDictionary at:#y2000 put:conv.
conv :=
[
(year between:1900 and:1999) ifFalse:[
self error:'year cannot be represented'
].
(year - 1900) printStringLeftPaddedTo:2 with:$0
].
aDictionary at:#Y1900 put:conv.
aDictionary at:#y1900 put:conv.
aDictionary at:$w put:wsPadded0.
aDictionary at:$W put:ws.
aDictionary at:#monthName put:monthName.
aDictionary at:#monthname put:monthName asLowercase.
aDictionary at:#MonthName put:monthName asUppercaseFirst.
aDictionary at:#MONTHNAME put:monthName asUppercase.
aDictionary at:#dayName put:dayName.
aDictionary at:#dayname put:dayName asLowercase.
aDictionary at:#DayName put:dayName asUppercaseFirst.
aDictionary at:#DAYNAME put:dayName asUppercase.
aDictionary at:#weekDay put:dayInWeek.
aDictionary at:#weekday put:dayInWeek.
aDictionary at:#weekDayUS put:dayOfWeek.
aDictionary at:#dayOfYear put:dayOfYear.
aDictionary at:#shortDayName put:(shortDayName := self class abbreviatedNameOfDay:(self dayInWeek) language:languageOrNil).
aDictionary at:#shortdayname put:shortDayName asLowercase.
aDictionary at:#ShortDayName put:shortDayName asUppercaseFirst.
aDictionary at:#SHORTDAYNAME put:shortDayName asUppercase.
aDictionary at:#shortMonthName put:(shortMonthName := self class abbreviatedNameOfMonth:(self month) language:languageOrNil).
aDictionary at:#shortmonthname put:shortMonthName asLowercase.
aDictionary at:#ShortMonthName put:shortMonthName asUppercaseFirst.
aDictionary at:#SHORTMONTHNAME put:shortMonthName asUppercase.
aDictionary at:#nth put:(#('th' 'st' 'nd' 'rd' 'th' 'th' 'th' 'th' 'th' 'th') at:day \\ 10 + 1).
"/ 0 1 2 3 4 5 6 7 8 9
aDictionary at:#weekDayNth put:(#('th' 'st' 'nd' 'rd' 'th' 'th' 'th') at:(dayOfWeek-1) \\ 10 + 1).
"/ 0 1 2 3 4 5 6
aDictionary at:#weekDayUSNth put:(#('st' 'nd' 'rd' 'th' 'th' 'th' 'th') at:(dayOfWeek-1) \\ 10 + 1).
"/ 0 1 2 3 4 5 6
aDictionary at:#weekNth put:(#('th' 'st' 'nd' 'rd' 'th' 'th' 'th' 'th' 'th' 'th') at:weekInYear \\ 10 + 1).
"/ 0 1 2 3 4 5 6 7 8 9
aDictionary at:#yearRoman put:[ year romanPrintString ].
aDictionary at:#monthRoman put:[ month romanPrintString ].
"
Date today printStringFormat:'%(weekDay)'
Date today printStringFormat:'%(iso8601)'
"
"Modified: / 25-05-2018 / 12:10:33 / Claus Gittinger"
!
printIso8601CompressedOn:aStream
"append the compact iso8601 representation of the receiver to aStream.
This format looks like:
19990101T240000
or, for zero hr:min:sec,
19990101
Of course, a 24 hour clock is used.
No timezone information is added, so the reader will read as local time."
self printOn:aStream format:'%y%m%d'.
"
Timestamp now printStringIso8601Format -> '2018-05-09T12:17:32.646'.
Date today printStringIso8601Format -> '2018-05-09'.
Time now printStringIso8601Format -> '2018-05-09'.
Timestamp now printStringIso8601Compressed -> '20180525T120446.266'.
Date today printStringIso8601Compressed -> '2018-05-09'.
Time now printStringIso8601Compressed -> '2018-05-09'.
Timestamp now printIso8601FormatOn:Transcript. Transcript cr.
Timestamp readIso8601FormatFrom:(Timestamp now printStringIso8601Format).
UtcTimestamp now printIso8601FormatOn:Transcript. Transcript cr.
UtcTimestamp readIso8601FormatFrom:(UtcTimestamp now printStringIso8601Format).
"
"Created: / 25-05-2018 / 12:05:04 / Claus Gittinger"
!
printIso8601FormatOn:aStream
"append the iso8601 representation of the receiver to aStream.
This format looks like:
1999-01-01T24:00:00
or, for zero hr:min:sec,
1999-01-01
Of course, a 24 hour clock is used.
No timezone information is added, so the reader will read as local time."
self printOn:aStream format:'%y-%m-%d'.
"
Timestamp now printStringIso8601Format -> '2018-05-09T12:17:32.646+02'.
Date today printStringIso8601Format -> '2018-05-09'.
Time now printStringIso8601Format -> '2018-05-09'.
Timestamp now printIso8601FormatOn:Transcript. Transcript cr.
Timestamp readIso8601FormatFrom:(Timestamp now printStringIso8601Format).
UtcTimestamp now printIso8601FormatOn:Transcript. Transcript cr.
UtcTimestamp readIso8601FormatFrom:(UtcTimestamp now printStringIso8601Format).
"
"Modified (comment): / 25-05-2018 / 12:03:37 / Claus Gittinger"
!
printOn:aStream
"append a printed representation of the receiver to aStream"
self printOn:aStream format:(self class defaultFormatString) language:nil.
"
Date today printOn:Transcript. Transcript cr.
"
"Modified: 27.8.1995 / 01:01:49 / claus"
!
printOn:aStream format:aFormatStringOrSqueakFormatArray
"print using a format string;
see #addPrintBindingsTo: for a list of valid format strings"
self printOn:aStream format:aFormatStringOrSqueakFormatArray language:nil.
"
Date today printOn:Transcript format:'%y%m%d' (iso format)
Date today printOn:Transcript format:'%y-%m-%d' (iso format)
Date today printOn:Transcript format:'%y-W%w' (iso format - working week)
Date today printOn:Transcript format:'%d-%m-%y' (european trivia format)
Date today printOn:Transcript format:'%m/%d/%y' (us trivia format)
Date today printOn:Transcript format:'%D-%(monthName)-%y' (us trivia format)
Date today printOn:Transcript format:'%D-%(MonthName)-%y' (us trivia format)
Date today printOn:Transcript format:'%D-%(MONTHNAME)-%y' (us trivia format)
Date today printOn:Transcript format:'%(DayName), %D%(nth) of %(MonthName), %y'
Date today printOn:Transcript format:'%(DayName), %(MonthName) %d, %y' language:#en
Date today printOn:Transcript format:'%(ShortDayName), %D-%(ShortMonthName)-%y'
Date today printOn:Transcript format:'%d%m%Y' (millenium bug format - danger)
Date today printOn:Transcript format:'%d%m%(Y1950)' (millenium bug partial workaround format - danger)
Date today printOn:Transcript format:'%d%m%(Y1980)' (millenium bug partial workaround format - danger)
Date today printOn:Transcript format:'Today is the %(weekDay) day of the week'
Date today printOn:Transcript format:'Today is %(year).%(monthRoman).%D' (hungarian format)
Date today printOn:Transcript format:'Today is %(D) %(monthRoman) %y' (poland)
Date today printOn:Transcript format:'Today is %(D)-%(monthRoman)-%y' (romania)
Date today printOn:Transcript format:'Today is %(D)/%(mon)-%Y' (sweden)
Date today printOn:Transcript format:'Anno domini %(yearRoman)'
Date today printOn:Transcript format:'%y年%(mon)月%d日' (select a font, which can display those chars)
Date today printOn:Transcript format:'%(dayOfYear)'
"
"short form (as in blogs like www.stackoverflow, www.superuser etc.)
Date today printOn:Transcript format:'%(MonthName) %D ''%Y'
Timestamp now printOn:Transcript format:'%(MonthName) %D ''%Y at %h:%m'
"
"Squeak format spec:
String streamContents:[:s |
Date today printOn:s format:#(1 2 3 $/ 1 2)
]
"
"Modified (comment): / 10-02-2019 / 15:40:30 / Claus Gittinger"
!
printOn:aStream format:aFormatStringOrSqueakFormatArray language:languageOrNil
"print using a format string;
languageOrNil can only be #en or nil for the current language.
see #addPrintBindingsTo: for a list of valid format strings"
|dict|
aFormatStringOrSqueakFormatArray isArray ifTrue:[
"backward compatibility: a squeak/st80 format array"
self printFormat:aFormatStringOrSqueakFormatArray on:aStream.
^ self.
].
dict := IdentityDictionary new.
self addPrintBindingsTo:dict language:languageOrNil.
aFormatStringOrSqueakFormatArray expandPlaceholdersWith:dict on:aStream
"
Date today
printOn:Transcript
format:'%y%m%d'
language:#en
"
!
printOn:aStream language:languageOrNil
"append a printed representation of the receiver to aStream.
The argument languageOrNil can only be #en or nil for the current language."
|format langUsed|
(DefaultFormats isNil or:[EnvironmentChange]) ifTrue:[
self class initNames
].
langUsed := languageOrNil notNil ifTrue:[languageOrNil] ifFalse:[Smalltalk language].
format := DefaultFormats at:langUsed ifAbsent:[DefaultFormats at:#en].
self printOn:aStream format:format language:languageOrNil.
"
Date today printOn:Transcript language:#en
Date today printOn:Transcript language:#de
"
"Modified: / 27-08-1995 / 01:01:49 / claus"
"Modified: / 12-03-2004 / 19:23:54 / cg"
!
printStringFormat:aFormatStringOrArray
"print using a format string;
see #addPrintBindingsTo: for a list of valid format strings"
^ self printStringFormat:aFormatStringOrArray language:nil
"
Date today printStringFormat:'%y%m%d' (iso format)
Date today printStringFormat:'%y-%m-%d' (iso format)
Date today printStringFormat:'%y-W%w' (iso format - working week)
Date today printStringFormat:'%d-%m-%y' (european trivia format)
Date today printStringFormat:'%m/%d/%y' (us trivia format)
Date today printStringFormat:'%D-%(monthName)-%y' (us trivia format)
Date today printStringFormat:'%D-%(MonthName)-%y' (us trivia format)
Date today printStringFormat:'%D-%(MONTHNAME)-%y' (us trivia format)
Date today printStringFormat:'%(DayName), %D%(nth) of %(MonthName), %y'
Date today printStringFormat:'%(ShortDayName), %D-%(ShortMonthName)-%y'
Date today printStringFormat:'%d%m%Y' (millenium bug format - danger)
Date today printStringFormat:'Today is day %(weekDay) of the week'
Date today printStringFormat:'Today is the %(weekDay)%(weekDayNth) day of the week'
Date today printStringFormat:'Today is the %(Day)%(nth) day of the month'
"
!
printStringFormat:aFormatStringOrArray language:languageOrNil
"print using a format string;
languageOrNil can only be #en or nil for the current language.
see #addPrintBindingsTo: for a list of valid format strings"
|s|
s := CharacterWriteStream new:20.
self printOn:s format:aFormatStringOrArray language:languageOrNil.
^ s contents.
"
Date today printStringFormat:'%y%m%d' (iso format)
Date today printStringFormat:'%y-%m-%d' (iso format)
Date today printStringFormat:'%y-W%w' (iso format - working week)
Date today printStringFormat:'%d-%m-%y' (european trivia format)
Date today printStringFormat:'%m/%d/%y' (us trivia format)
Date today printStringFormat:'%D-%(monthName)-%y' (us trivia format)
Date today printStringFormat:'%D-%(MonthName)-%y' (us trivia format)
Date today printStringFormat:'%D-%(MONTHNAME)-%y' (us trivia format)
Date today printStringFormat:'%(DayName), %D%(nth) of %(MonthName), %y'
Date today printStringFormat:'%(ShortDayName), %D-%(ShortMonthName)-%y'
Date today printStringFormat:'%d%m%Y' (millenium bug format - danger)
Date today printStringFormat:'Today is day %(weekDay) of the week'
Date today printStringFormat:'Today is the %(weekDay)%(weekDayNth) day of the week'
Date today printStringFormat:'Today is the %(Day)%(nth) day of the month'
"
!
printStringIso8601
"return the Iso8601 representation of the receiver with local timezon information.
This format looks like:
1999-01-01T24:00:00
or, for zero hr:min:sec,
1999-01-01
Of course, a 24 hour clock is used."
^ String streamContents:[:s | self printIso8601FormatOn:s]
"
Date today printStringIso8601
Timestamp now printStringIso8601
Time now printStringIso8601
"
!
printStringIso8601Compressed
"return the Iso8601 representation of the receiver with local timezon information.
This format looks like:
19990101T240000
or, for zero hr:min:sec (i.e. Date),
19990101
Of course, a 24 hour clock is used."
^ String streamContents:[:s | self printIso8601CompressedOn:s]
"
Date today printStringIso8601
Date today printStringIso8601Compressed
Timestamp now printStringIso8601
Timestamp now printStringIso8601Compressed
Time now printStringIso8601
Time now printStringIso8601Compressed
"
"Created: / 25-05-2018 / 12:05:46 / Claus Gittinger"
!
storeOn:aStream
"append a representation to aStream, from which the receiver
can be reconstructed"
aStream nextPut:$(; nextPutAll:'Date newDay:'.
self day printOn:aStream.
aStream nextPutAll:' month:'.
self month printOn:aStream.
aStream nextPutAll:' year:'.
self year printOn:aStream.
aStream nextPut:$)
"
Date today storeOn:Transcript
Date today storeString
"
"Modified: / 17-02-2017 / 10:57:34 / stefan"
! !
!Date methodsFor:'private-accessing'!
dateEncoding
"the internal encoding is stricktly private,
and should not be used outside."
^ dateEncoding
!
dateEncoding:anInteger
"the internal encoding is stricktly private,
and should not be used outside."
dateEncoding := anInteger
!
fromOSTime:osTime
"set my dateEncoding as date in the local timezone from an OS time.
This somewhat clumsy implementation hides the OS's date representation
(i.e. makes this class independent of what the OS starts its time values with).
Don't use this method, the osTime representation is totally unportable."
|v|
v := OperatingSystem computeTimeAndDateFrom:osTime.
dateEncoding := self class encodeYear:v year month:v month day:v day
"Modified: 1.7.1996 / 15:23:12 / cg"
!
fromUtcOSTime:osTime
"set my dateEncoding as UTC date from an OS time.
This somewhat clumsy implementation hides the OS's date representation
(i.e. makes this class independent of what the OS starts its time values with).
Don't use this method, the osTime representation is totally unportable."
|v|
v := OperatingSystem computeUTCTimeAndDateFrom:osTime.
dateEncoding := self class encodeYear:v year month:v month day:v day
"Modified: 1.7.1996 / 15:23:12 / cg"
!
getMilliseconds
"protocol compatibility with Timestamp.
Only use to get millisecond deltas between dates (if at all).
Returns the number of milliseconds of midnight since the epoch (1.1.1970).
Notice:
because Date does not include timezone info (in contrast to Timestamp),
this returns the millis of the UTC date (see example below).
Notice:
beacuse of that, always use Timestamps for comparisons."
"
((Timestamp epoch addDays:365) asDate asDays - 365) -> 25202
"
^ 1000 * 60*60*24 * (self asDays - 25202)
"
Date today asUtcTimestamp getMilliseconds
-
Date today getMilliseconds
Date today asTimestamp getMilliseconds
-
Date today getMilliseconds
(Date year:1970 month:1 day:1) asTimestamp getMilliseconds -- local time
(Date year:1970 month:1 day:1) asUtcTimestamp getMilliseconds -- utc time
(Date year:1970 month:1 day:1) getMilliseconds -- utc time
"
! !
!Date methodsFor:'visiting'!
acceptVisitor:aVisitor with:aParameter
"dispatch for visitor pattern; send #visitDate:with: to aVisitor"
^ aVisitor visitDate:self with:aParameter
! !
!Date class methodsFor:'documentation'!
version
^ '$Header$'
!
version_CVS
^ '$Header$'
! !
Date initialize!