X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=datetime.lisp;h=b865f48a3ece1d541d2ecea8e2d3119ec5e5939e;hp=4a4dbe2e321feae2789864b0d657c82759a9a1c6;hb=HEAD;hpb=98d7b650aa611a0de537ace581cde47c66071af3 diff --git a/datetime.lisp b/datetime.lisp index 4a4dbe2..b865f48 100644 --- a/datetime.lisp +++ b/datetime.lisp @@ -7,8 +7,6 @@ ;;;; Programmer: Kevin M. Rosenberg ;;;; Date Started: Apr 2000 ;;;; -;;;; $Id$ -;;;; ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg ;;;; ;;;; KMRCL users are granted the rights to distribute and use this software @@ -26,27 +24,67 @@ (decode-universal-time (encode-universal-time s m hour day month year)) (values (elt '("Monday" "Tuesday" "Wednesday" "Thursday" - "Friday" "Saturday" "Sunday") - wkday) - (elt '("January" "February" "March" "April" "May" "June" - "July" "August" "September" "October" "November" - "December") - (1- mn)) - (format nil "~A" dy) (format nil "~A" yr) - (format nil "~2,'0D:~2,'0D:~2,'0D" hr min sec)))) - - -(defun date-string (ut) + "Friday" "Saturday" "Sunday") + wkday) + (elt '("January" "February" "March" "April" "May" "June" + "July" "August" "September" "October" "November" + "December") + (1- mn)) + (format nil "~A" dy) + (format nil "~A" yr) + (format nil "~2,'0D:~2,'0D:~2,'0D" hr min sec)))) + +(defun pretty-date-ut (&optional (tm (get-universal-time))) + (multiple-value-bind (sec min hr dy mn yr) (decode-universal-time tm) + (pretty-date yr mn dy hr min sec))) + +(defun date-string (&optional (ut (get-universal-time))) (if (typep ut 'integer) (multiple-value-bind (sec min hr day mon year dow daylight-p zone) - (decode-universal-time ut) - (declare (ignore daylight-p zone)) - (format nil "~[Mon~;Tue~;Wed~;Thu~;Fri~;Sat~;Sun~], ~d ~[Jan~;Feb~;Mar~;Apr~;May~;Jun~;Jul~;Aug~;Sep~;Oct~;Nov~;Dec~] ~d ~2,'0d:~2,'0d:~2,'0d" - dow - day - (1- mon) - year - hr min sec)))) + (decode-universal-time ut) + (declare (ignore daylight-p zone)) + (format nil "~[Mon~;Tue~;Wed~;Thu~;Fri~;Sat~;Sun~] ~d ~[Jan~;Feb~;Mar~;Apr~;May~;Jun~;Jul~;Aug~;Sep~;Oct~;Nov~;Dec~] ~d ~2,'0d:~2,'0d:~2,'0d" + dow + day + (1- mon) + year + hr min sec)))) + +(eval-when (:compile-toplevel :load-toplevel :execute) + (defconstant +minute-seconds+ 60) + (defconstant +hour-seconds+ (* 60 +minute-seconds+)) + (defconstant +day-seconds+ (* 24 +hour-seconds+)) + (defconstant +week-seconds+ (* +day-seconds+ 7)) + (defconstant +month-seconds+ (* +day-seconds+ (/ 365.25 12))) + (defconstant +year-seconds+ (* +day-seconds+ 365.25))) + +(defun seconds-to-condensed-time-string (sec &key (dp-digits 0)) + "Prints a quantity of seconds as a condensed string. DP-DIGITS controls +how many digits after decimal point." + (multiple-value-bind (year yrem) (floor (coerce sec 'double-float) +year-seconds+) + (multiple-value-bind (month mrem) (floor yrem +month-seconds+) + (multiple-value-bind (week wrem) (floor mrem +week-seconds+) + (multiple-value-bind (day drem) (floor wrem +day-seconds+) + (multiple-value-bind (hour hrem) (floor drem +hour-seconds+) + (multiple-value-bind (minute minrem) (floor hrem +minute-seconds+) + (let ((secstr (if (zerop dp-digits) + (format nil "~Ds" (round minrem)) + (format nil (format nil "~~,~DFs" dp-digits) minrem)))) + (cond + ((plusp year) + (format nil "~Dy~DM~Dw~Dd~Dh~Dm~A" year month week day hour minute secstr)) + ((plusp month) + (format nil "~DM~Dw~Dd~Dh~Dm~A" month week day hour minute secstr)) + ((plusp week) + (format nil "~Dw~Dd~Dh~Dm~A" week day hour minute secstr)) + ((plusp day) + (format nil "~Dd~Dh~Dm~A" day hour minute secstr)) + ((plusp hour) + (format nil "~Dh~Dm~A" hour minute secstr)) + ((plusp minute) + (format nil "~Dm~A" minute secstr)) + (t + secstr)))))))))) (defun print-seconds (secs) (print-float-units secs "sec")) @@ -68,8 +106,57 @@ (t (format t "~,2F ~A" val unit)))) - -;;;; Daylight Saving Time calculations +(defconstant +posix-epoch+ + (encode-universal-time 0 0 0 1 1 1970 0)) + +(defun posix-time-to-utime (time) + (+ time +posix-epoch+)) + +(defun utime-to-posix-time (utime) + (- utime +posix-epoch+)) + +;; Monthnames taken from net-telent-date to support lml2 + +(defvar *monthnames* + '((1 . "January") + (2 . "February") + (3 . "March") + (4 . "April") + (5 . "May") + (6 . "June") + (7 . "July") + (8 . "August") + (9 . "September") + (10 . "October") + (11 . "November") + (12 . "December"))) + +(defun monthname (stream arg colon-p at-p &optional width (mincol 0) (colinc 1) (minpad 0) (padchar #\Space)) + "Print the name of the month (1=January) corresponding to ARG on STREAM. This is intended for embedding in a FORMAT directive: WIDTH governs the number of characters of text printed, MINCOL, COLINC, MINPAD, PADCHAR work as for ~A" + (declare (ignore colon-p)) + (let ((monthstring (cdr (assoc arg *monthnames*)))) + (if (not monthstring) (return-from monthname nil)) + (let ((truncate (if width (min width (length monthstring)) nil))) + (format stream + (if at-p "~V,V,V,V@A" "~V,V,V,VA") + mincol colinc minpad padchar + (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 begins for most of the United States at 2 ;; a.m. on the first Sunday of April. Time reverts to standard time at @@ -101,3 +188,4 @@ ;; 2007 April 1 October 28 March 25 October 28 ;; 2008 April 6 October 26 March 30 October 26 +