71 lines
2.7 KiB
EmacsLisp
71 lines
2.7 KiB
EmacsLisp
;;; minari.el --- Calculate Minari dates
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;;; Commentary:
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;;
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;;; Code:
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(defconst minari-special-day-names
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'("Hëður" "Rideyy" "Morkh" "Morkh+" "Khmerd" "Chamog")
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"Names of the special (monthless) days of the year.")
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(defconst minari-weekday-names
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'("Ro’unn" "Mïrdu" "Hëmi" "Drak" "Þodon" "Charm")
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"Names of weekdays.")
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(defconst minari-month-names
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'("Mëbel" "Dirann" "Ma’uþ"
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"Gerub" "Þrei" "Dimoc"
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"Xentor" "Mëðïr" "Draþ"
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"Quaden" "Ridïmel" "Rodom")
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"Names of months.")
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(defun minari-today-string ()
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"Calculate today's date according to the Minari Calendar."
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(let ((today (decode-time (current-time))))
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;; FIXME: I’m not sure about this one… If I increment by 11, I get a
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;; wrong date according to my GNOME Shell extension. If I increment by
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;; 10, the date is OK, but by calculating it in my head, it’s bad.
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(incf (nth 3 today) 10)
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(let* ((minari-leap (date-leap-year-p (nth 5 today)))
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(doy (time-to-day-in-year (apply 'encode-time today)))
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(minari-year (- (nth 5 today) 1873))
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(minari-month 0)
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(minari-doy 0)
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(minari-day 0)
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(minari-weekday 0)
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(minari-special-day -1))
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(cond
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((eq doy 0) (setq minari-special-day 0))
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((eq doy 91) (setq minari-special-day 1))
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((eq doy 182) (setq minari-special-day 2))
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((and (eq doy 183) minari-leap) (setq minari-special-day 3))
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((and (eq doy 273) (not minari-leap)) (setq minari-special-day 4))
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((and (eq doy 274) minari-leap) (setq minari-special-day 4))
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((and (eq doy 364) (not minari-leap)) (setq minari-special-day 5))
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((and (eq doy 365) minari-leap) (setq minari-special-day 5))
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(t (let ((decr 0)
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(minari-doy doy))
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(when (> minari-doy 0) (incf decr))
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(when (> minari-doy 91) (incf decr))
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(when (> minari-doy 182) (incf decr))
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(when (and (> minari-doy 183) minari-leap) (incf decr))
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(when (and (> minari-doy 273) (not minari-leap)) (incf decr))
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(when (and (> minari-doy 274) minari-leap) (incf decr))
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(setq minari-doy (- minari-doy (- decr 1))
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minari-month (round (fceiling (/ minari-doy 30.0)))
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minari-day (% minari-doy 30))
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(when (eq minari-day 0) (setq minari-day 30))
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(setq minari-weekday (% minari-day 6)))))
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(if (eq -1 minari-special-day)
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(format "%d %s %s (%s)"
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minari-year
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(nth (- minari-month 1) minari-month-names)
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minari-day
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(nth minari-weekday minari-weekday-names))
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(nth (- minari-special-day 1) minari-special-day-names)))))
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(provide 'minari)
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;;; minari.el ends here
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