mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-04 08:47:11 +00:00
Fixed dst-in-effect for southern hemisphere. Also made doc string clearer.
This commit is contained in:
parent
d613bdc034
commit
021edd45dc
@ -332,27 +332,26 @@ If the locale never uses daylight savings time, set this to nil.")
|
||||
|
||||
(defun dst-in-effect (date)
|
||||
"True if on absolute DATE daylight savings time is in effect.
|
||||
Fractional part of DATE is time of day."
|
||||
Fractional part of DATE is local standard time of day."
|
||||
(let* ((year (extract-calendar-year
|
||||
(calendar-gregorian-from-absolute (floor date))))
|
||||
(dst-starts (and (eval calendar-daylight-savings-starts)
|
||||
(dst-starts-gregorian (eval calendar-daylight-savings-starts))
|
||||
(dst-ends-gregorian (eval calendar-daylight-savings-ends))
|
||||
(dst-starts (and dst-starts-gregorian
|
||||
(+ (calendar-absolute-from-gregorian
|
||||
(eval calendar-daylight-savings-starts))
|
||||
dst-starts-gregorian)
|
||||
(/ calendar-daylight-savings-starts-time
|
||||
60.0 24.0))))
|
||||
(dst-ends (and (eval calendar-daylight-savings-ends)
|
||||
(dst-ends (and dst-ends-gregorian
|
||||
(+ (calendar-absolute-from-gregorian
|
||||
(eval calendar-daylight-savings-ends))
|
||||
dst-ends-gregorian)
|
||||
(/ (- calendar-daylight-savings-ends-time
|
||||
calendar-daylight-time-offset)
|
||||
60.0 24.0)))))
|
||||
(and (and dst-starts dst-ends
|
||||
(or (and (< dst-starts dst-ends);; northern hemi.
|
||||
(<= dst-starts date) (< date dst-ends))
|
||||
(and (< dst-ends dst-starts);; southern hemi.
|
||||
(<= dst-starts date) (< date dst-ends))
|
||||
(and dst-starts (not dst-ends) (<= dst-starts date))
|
||||
(and dst-ends (not dst-starts) (< date dst-ends)))))))
|
||||
(and dst-starts dst-ends
|
||||
(if (< dst-starts dst-ends)
|
||||
(and (<= dst-starts date) (< date dst-ends))
|
||||
(or (<= dst-starts date) (< date dst-ends))))))
|
||||
|
||||
(defun dst-adjust-time (date time &optional style)
|
||||
"Adjust, to account for dst on DATE, decimal fraction standard TIME.
|
||||
|
Loading…
Reference in New Issue
Block a user