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34 lines
1.1 KiB
34 lines
1.1 KiB
(define-module (tk mcron)
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#:export (sec/min sec/hour sec/day sec/week
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sec/mins sec/hours sec/days sec/weeks
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step-from
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str->secs
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strf->secs
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)
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#:use-module (srfi srfi-19)
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#:duplicates (warn-override-core warn))
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(define sec/min 60)
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(define sec/hour (* 60 sec/min))
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(define sec/day (* 24 sec/hour))
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(define sec/week (* 7 sec/day))
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(define (sec/mins n) (* n sec/min))
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(define (sec/hours n) (* n sec/hour))
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(define (sec/days n) (* n sec/day))
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(define (sec/weeks n) (* n sec/week))
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;; Format here refers to the format found in srfi-19 (Ref: 7.5.16.6)
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;; Literally just conversions out of (string->date)
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(define (strf->secs str format)
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(time-second (date->time-utc (string->date str format))))
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(define (str->secs str)
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(strf->secs str "~Y~m~d~H~M~S"))
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;; Normalize the time tm to be the next step sized increment from base.
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;; All time arguments are expected to be a time in seconds
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(define (step-from base step tm)
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(let ((steps (euclidean-quotient (- tm base) step)))
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(+ base (* step (+ 1 steps)))))
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