diff options
Diffstat (limited to 'module/srfi/srfi-19/alt.scm')
| -rw-r--r-- | module/srfi/srfi-19/alt.scm | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/module/srfi/srfi-19/alt.scm b/module/srfi/srfi-19/alt.scm index 09f70190..33a1bc1f 100644 --- a/module/srfi/srfi-19/alt.scm +++ b/module/srfi/srfi-19/alt.scm @@ -487,6 +487,40 @@ (date day: overflow)) time: time))) +(define (datetime->srfi-19-date date) + ((@ (srfi srfi-19) make-date) + 0 + (second (get-time date)) + (minute (get-time date)) + (hour (get-time date)) + (day (get-date date)) + (month (get-date date)) + (year (get-date date)) + 0 ; TODO TZ + )) + +(define (srfi-19-date->datetime o) + (let ((y ((@ (srfi srfi-19) date-year) o))) + ;; TODO find better way to translate from 1970 to 0, since this WILL + ;; cause problems sooner or later. + (datetime year: (if (= 1970 y) 0 y) + month: (let ((m ((@ (srfi srfi-19) date-month) o))) + (if (and (= 1970 y) (= 1 m)) 0 m)) + day: (let ((d ((@ (srfi srfi-19) date-day) o))) + (if (and (= 1970 y) (= 1 d)) 0 d)) + hour: ((@ (srfi srfi-19) date-hour) o) + minute: ((@ (srfi srfi-19) date-minute) o) + second: ((@ (srfi srfi-19) date-second) o) + ))) + + +(define-public (datetime-difference end start) + (let ((t + ((@ (srfi srfi-19) time-difference) + ((@ (srfi srfi-19) date->time-utc) (datetime->srfi-19-date end)) + ((@ (srfi srfi-19) date->time-utc) (datetime->srfi-19-date start))))) + ((@ (srfi srfi-19) set-time-type!) t (@ (srfi srfi-19) time-utc)) + (srfi-19-date->datetime ((@ (srfi srfi-19) time-utc->date) t 0)))) ; TODO tz offset ;;; Parsers for vcomponent usage |