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Nyxt
kmrcl
Commits
22765cd4
Commit
22765cd4
authored
17 years ago
by
Kevin M. Rosenberg
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r11722: add day-of-week
parent
bcccfec7
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ChangeLog
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ChangeLog
datetime.lisp
+15
-1
15 additions, 1 deletion
datetime.lisp
with
18 additions
and
1 deletion
ChangeLog
+
3
−
0
View file @
22765cd4
01 Jun 2007 Kevin Rosenberg <kevin@rosenberg.net>
* datetime.lisp: Add day-of-week
07 Jan 2007 Kevin Rosenberg <kevin@rosenberg.net>
07 Jan 2007 Kevin Rosenberg <kevin@rosenberg.net>
* Version 1.94
* Version 1.94
* signals.lisp: Conditionalize Lispworks support to :unix *features*
* signals.lisp: Conditionalize Lispworks support to :unix *features*
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datetime.lisp
+
15
−
1
View file @
22765cd4
...
@@ -32,7 +32,7 @@
...
@@ -32,7 +32,7 @@
"July"
"August"
"September"
"October"
"November"
"July"
"August"
"September"
"October"
"November"
"December"
)
"December"
)
(
1-
mn
))
(
1-
mn
))
(
format
nil
"~A"
dy
)
(
format
nil
"~A"
dy
)
(
format
nil
"~A"
yr
)
(
format
nil
"~A"
yr
)
(
format
nil
"~2,'0D:~2,'0D:~2,'0D"
hr
min
sec
))))
(
format
nil
"~2,'0D:~2,'0D:~2,'0D"
hr
min
sec
))))
...
@@ -108,6 +108,20 @@
...
@@ -108,6 +108,20 @@
mincol
colinc
minpad
padchar
mincol
colinc
minpad
padchar
(
subseq
monthstring
0
truncate
)))))
(
subseq
monthstring
0
truncate
)))))
(
defconstant*
+zellers-adj+
#(
0
3
2
5
0
3
5
1
4
6
2
4
))
(
defun
day-of-week
(
year
month
day
)
"Day of week calculation using Zeller's Congruence.
Input: The year y, month m (1 ≤ m ≤ 12) and day d (1 ≤ d ≤ 31).
Output: n - the day of the week (Sunday = 0, Saturday = 6)."
(
when
(
<
month
3
)
(
decf
year
))
(
mod
(
+
year
(
floor
year
4
)
(
-
(
floor
year
100
))
(
floor
year
400
)
(
aref
+zellers-adj+
(
1-
month
))
day
)
7
))
;;;; Daylight Saving Time calculations
;;;; Daylight Saving Time calculations
;; Daylight Saving Time begins for most of the United States at 2
;; Daylight Saving Time begins for most of the United States at 2
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