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;;; sx-time.el --- time for stack-mode
;; Copyright (C) 2014 Sean Allred
;; Author: Sean Allred <sallred@calamity.tcs.com>
;; Keywords: help
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'time-date)
(defvar sx-time-seconds-to-string
;; (LIMIT NAME VALUE)
;; We use an entry if the number of seconds in question is less than
;; LIMIT, but more than the previous entry's LIMIT.
'((100 "s" 1)
(6000 "m" 60.0)
(108000 "h" 3600.0)
(34560000 "d" 86400.0)
(nil "y" 31557600.0))
"Auxiliary variable used by `sx-time-since'.")
(defun sx-time-since (time)
"Convert the time interval since TIME (in seconds) to a short string."
(let ((delay (- (time-to-seconds) time)))
(concat
(if (> 0 delay) "-" "")
(if (= 0 delay) "0s"
(setq delay (abs delay))
(let ((sts sx-time-seconds-to-string) here)
(while (and (car (setq here (pop sts)))
(<= (car here) delay)))
(concat (format "%.0f" (/ delay (car (cddr here))))
(cadr here)))))))
(provide 'sx-time)
;;; sx-time.el ends here
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