diff options
Diffstat (limited to 'src/mcron/vixie-time.scm')
| -rw-r--r-- | src/mcron/vixie-time.scm | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/src/mcron/vixie-time.scm b/src/mcron/vixie-time.scm index 0a39e41..64f0e87 100644 --- a/src/mcron/vixie-time.scm +++ b/src/mcron/vixie-time.scm @@ -122,27 +122,20 @@ (parse-vixie-subelement sub-element base limit)) (string-tokenize string (char-set-complement (char-set #\,)))))) - - -;; Consider there are two lists, one of days in the month, the other of days in -;; the week. This procedure returns an augmented list of days in the month with -;; weekdays accounted for. - (define (interpolate-weekdays mday-list wday-list month year) + "Given a list of days in the month MDAY-LIST and a list of days in the week +WDAY-LIST, return an augmented list of days in the month with weekdays +accounted for." (let ((t (localtime 0))) - (set-tm:mday t 1) - (set-tm:mon t month) - (set-tm:year t year) + (set-tm:mday t 1) + (set-tm:mon t month) + (set-tm:year t year) (let ((first-day (tm:wday (cdr (mktime t))))) - (apply append - mday-list - (map (lambda (wday) - (let ((first (- wday first-day))) - (if (< first 0) (set! first (+ first 7))) - (range (+ 1 first) 32 7))) - wday-list))))) - - + (define (range-wday wday) + (let* ((first (- wday first-day)) + (first* (if (negative? first) (+ 7 first) first))) + (range (1+ first*) 32 7))) + (apply append mday-list (map range-wday wday-list))))) ;; Return the number of days in a month. Fix up a tm object for the zero'th day ;; of the next month, rationalize the object and extract the day. |