From: Paul Eggert Date: Fri, 24 Jan 2020 21:36:56 +0000 (-0800) Subject: Fix iso8601-parse so unknown DST is -1, not nil X-Git-Tag: emacs-28.0.90~7908^2~51 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=a391ffa2f0377306449b36cc62858db823d2e990;p=emacs.git Fix iso8601-parse so unknown DST is -1, not nil The convention in a decoded time’s dst flag is that t means DST, nil means standard time, and -1 means unknown. This differs from the convention for other components of a decoded time, where nil means unknown. Fix some places where iso8601-parse mistakenly treated nil as meaning that the dst flag was unknown. * doc/lispref/os.texi (Time Parsing): Adjust to match parse-time-string’s doc string. * lisp/calendar/iso8601.el (iso8601-parse): Set dst flag to nil if a numeric time zone or "Z" is given. (iso8601--decoded-time): Default dst flag to -1 if no dst flag or zone is given. * lisp/calendar/time-date.el (decoded-time-set-defaults): When we don’t have a time zone, set the dst flag consistently with DEFAULT-ZONE. * test/lisp/calendar/iso8601-tests.el (test-iso8601-date-years) (test-iso8601-date-dates, test-iso8601-date-obsolete) (test-iso8601-date-weeks, test-iso8601-date-ordinals) (test-iso8601-time, test-iso8601-combined) (test-iso8601-duration, test-iso8601-intervals) (standard-test-dates, standard-test-time-of-day-local-time) (standard-test-time-of-day-fractions) (nonstandard-test-time-of-day-decimals) (standard-test-time-of-day-beginning-of-day) (standard-test-date-and-time-of-day, standard-test-interval): Adjust tests to match fixed behavior. --- diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi index 201ca18c1e4..a034ccdcd5c 100644 --- a/doc/lispref/os.texi +++ b/doc/lispref/os.texi @@ -1689,7 +1689,8 @@ following form: @noindent The format of this list is the same as what @code{decode-time} accepts (@pxref{Time Conversion}), and is described in more detail there. Any -element that cannot be determined from the input will be set to +@code{dst} element that cannot be determined from the input is set to +@minus{}1, and any other unknown element is set to @code{nil}. The argument @var{string} should resemble an RFC 822 (or later) or ISO 8601 string, like ``Fri, 25 Mar 2016 16:24:56 +0100'' or ``1998-09-12T12:21:54-0200'', but this function will attempt to parse diff --git a/lisp/calendar/iso8601.el b/lisp/calendar/iso8601.el index ae1dab17252..e42fe0fa21f 100644 --- a/lisp/calendar/iso8601.el +++ b/lisp/calendar/iso8601.el @@ -136,7 +136,8 @@ See `decode-time' for the meaning of FORM." (when zone-string (setf (decoded-time-zone date) ;; The time zone in decoded times are in seconds. - (* (iso8601-parse-zone zone-string) 60))) + (* (iso8601-parse-zone zone-string) 60)) + (setf (decoded-time-dst date) nil)) date))) (defun iso8601-parse-date (string) @@ -332,6 +333,9 @@ Return the number of minutes." (list start end (or duration ;; FIXME: Support subseconds. + ;; FIXME: It makes no sense to decode a time difference + ;; according to (decoded-time-zone end), or according to + ;; any other time zone for that matter. (decode-time (time-subtract (iso8601--encode-time end) (iso8601--encode-time start)) (or (decoded-time-zone end) 0) 'integer))))) @@ -354,7 +358,7 @@ Return the number of minutes." (iso8601--value month) (iso8601--value year) nil - dst + (if (or dst zone) dst -1) zone)) (defun iso8601--encode-time (time) diff --git a/lisp/calendar/time-date.el b/lisp/calendar/time-date.el index 1e589ece29d..e2402de8010 100644 --- a/lisp/calendar/time-date.el +++ b/lisp/calendar/time-date.el @@ -515,15 +515,14 @@ TIME is modified and returned." (unless (decoded-time-year time) (setf (decoded-time-year time) 0)) - ;; When we don't have a time zone and we don't have a DST, then mark - ;; it as unknown. - (when (and (not (decoded-time-zone time)) - (not (decoded-time-dst time))) - (setf (decoded-time-dst time) -1)) - - (when (and (not (decoded-time-zone time)) - default-zone) - (setf (decoded-time-zone time) 0)) + ;; When we don't have a time zone, default to DEFAULT-ZONE without + ;; DST if DEFAULT-ZONE if given, and to unknown DST otherwise. + (unless (decoded-time-zone time) + (if default-zone + (progn (setf (decoded-time-zone time) default-zone) + (setf (decoded-time-dst time) nil)) + (setf (decoded-time-dst time) -1))) + time) (provide 'time-date) diff --git a/test/lisp/calendar/iso8601-tests.el b/test/lisp/calendar/iso8601-tests.el index 430680c5077..6e7a4724a6b 100644 --- a/test/lisp/calendar/iso8601-tests.el +++ b/test/lisp/calendar/iso8601-tests.el @@ -24,49 +24,49 @@ (ert-deftest test-iso8601-date-years () (should (equal (iso8601-parse-date "1985") - '(nil nil nil nil nil 1985 nil nil nil))) + '(nil nil nil nil nil 1985 nil -1 nil))) (should (equal (iso8601-parse-date "-0003") - '(nil nil nil nil nil -3 nil nil nil))) + '(nil nil nil nil nil -3 nil -1 nil))) (should (equal (iso8601-parse-date "+1985") - '(nil nil nil nil nil 1985 nil nil nil)))) + '(nil nil nil nil nil 1985 nil -1 nil)))) (ert-deftest test-iso8601-date-dates () (should (equal (iso8601-parse-date "1985-03-14") - '(nil nil nil 14 3 1985 nil nil nil))) + '(nil nil nil 14 3 1985 nil -1 nil))) (should (equal (iso8601-parse-date "19850314") - '(nil nil nil 14 3 1985 nil nil nil))) + '(nil nil nil 14 3 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-02") - '(nil nil nil nil 2 1985 nil nil nil)))) + '(nil nil nil nil 2 1985 nil -1 nil)))) (ert-deftest test-iso8601-date-obsolete () (should (equal (iso8601-parse-date "--02-01") - '(nil nil nil 1 2 nil nil nil nil))) + '(nil nil nil 1 2 nil nil -1 nil))) (should (equal (iso8601-parse-date "--0201") - '(nil nil nil 1 2 nil nil nil nil)))) + '(nil nil nil 1 2 nil nil -1 nil)))) (ert-deftest test-iso8601-date-weeks () (should (equal (iso8601-parse-date "2008W39-6") - '(nil nil nil 27 9 2008 nil nil nil))) + '(nil nil nil 27 9 2008 nil -1 nil))) (should (equal (iso8601-parse-date "2009W01-1") - '(nil nil nil 29 12 2008 nil nil nil))) + '(nil nil nil 29 12 2008 nil -1 nil))) (should (equal (iso8601-parse-date "2009W53-7") - '(nil nil nil 3 1 2010 nil nil nil)))) + '(nil nil nil 3 1 2010 nil -1 nil)))) (ert-deftest test-iso8601-date-ordinals () (should (equal (iso8601-parse-date "1981-095") - '(nil nil nil 5 4 1981 nil nil nil)))) + '(nil nil nil 5 4 1981 nil -1 nil)))) (ert-deftest test-iso8601-time () (should (equal (iso8601-parse-time "13:47:30") - '(30 47 13 nil nil nil nil nil nil))) + '(30 47 13 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "134730") - '(30 47 13 nil nil nil nil nil nil))) + '(30 47 13 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "1347") - '(0 47 13 nil nil nil nil nil nil)))) + '(0 47 13 nil nil nil nil -1 nil)))) (ert-deftest test-iso8601-combined () (should (equal (iso8601-parse "2008-03-02T13:47:30") - '(30 47 13 2 3 2008 nil nil nil))) + '(30 47 13 2 3 2008 nil -1 nil))) (should (equal (iso8601-parse "2008-03-02T13:47:30Z") '(30 47 13 2 3 2008 nil nil 0))) (should (equal (iso8601-parse "2008-03-02T13:47:30+01:00") @@ -76,13 +76,13 @@ (ert-deftest test-iso8601-duration () (should (equal (iso8601-parse-duration "P3Y6M4DT12H30M5S") - '(5 30 12 4 6 3 nil nil nil))) + '(5 30 12 4 6 3 nil -1 nil))) (should (equal (iso8601-parse-duration "P1M") - '(0 0 0 0 1 0 nil nil nil))) + '(0 0 0 0 1 0 nil -1 nil))) (should (equal (iso8601-parse-duration "PT1M") - '(0 1 0 0 0 0 nil nil nil))) + '(0 1 0 0 0 0 nil -1 nil))) (should (equal (iso8601-parse-duration "P0003-06-04T12:30:05") - '(5 30 12 4 6 3 nil nil nil)))) + '(5 30 12 4 6 3 nil -1 nil)))) (ert-deftest test-iso8601-invalid () (should-not (iso8601-valid-p " 2008-03-02T13:47:30-01")) @@ -101,88 +101,88 @@ (should (equal (iso8601-parse-interval "2007-03-01T13:00:00Z/P1Y2M10DT2H30M") '((0 0 13 1 3 2007 nil nil 0) (0 30 15 11 5 2008 nil nil 0) - (0 30 2 10 2 1 nil nil nil)))) + (0 30 2 10 2 1 nil -1 nil)))) (should (equal (iso8601-parse-interval "P1Y2M10DT2H30M/2008-05-11T15:30:00Z") '((0 0 13 1 3 2007 nil nil 0) (0 30 15 11 5 2008 nil nil 0) - (0 30 2 10 2 1 nil nil nil))))) + (0 30 2 10 2 1 nil -1 nil))))) (ert-deftest standard-test-dates () (should (equal (iso8601-parse-date "19850412") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-04-12") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985102") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-102") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985W155") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-W15-5") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985W15") - '(nil nil nil 7 4 1985 nil nil nil))) + '(nil nil nil 7 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-W15") - '(nil nil nil 7 4 1985 nil nil nil))) + '(nil nil nil 7 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985-04") - '(nil nil nil nil 4 1985 nil nil nil))) + '(nil nil nil nil 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "1985") - '(nil nil nil nil nil 1985 nil nil nil))) + '(nil nil nil nil nil 1985 nil -1 nil))) (should (equal (iso8601-parse-date "+1985-04-12") - '(nil nil nil 12 4 1985 nil nil nil))) + '(nil nil nil 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse-date "+19850412") - '(nil nil nil 12 4 1985 nil nil nil)))) + '(nil nil nil 12 4 1985 nil -1 nil)))) (ert-deftest standard-test-time-of-day-local-time () (should (equal (iso8601-parse-time "152746") - '(46 27 15 nil nil nil nil nil nil))) + '(46 27 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "15:27:46") - '(46 27 15 nil nil nil nil nil nil))) + '(46 27 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "1528") - '(0 28 15 nil nil nil nil nil nil))) + '(0 28 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "15:28") - '(0 28 15 nil nil nil nil nil nil))) + '(0 28 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "15") - '(0 0 15 nil nil nil nil nil nil)))) + '(0 0 15 nil nil nil nil -1 nil)))) (ert-deftest standard-test-time-of-day-fractions () (should (equal (iso8601-parse-time "152735,5" t) - '((355 . 10) 27 15 nil nil nil nil nil nil))) + '((355 . 10) 27 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "15:27:35,5" t) - '((355 . 10) 27 15 nil nil nil nil nil nil))) + '((355 . 10) 27 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "2320,5" t) - '(30 20 23 nil nil nil nil nil nil))) + '(30 20 23 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "23:20,8" t) - '(48 20 23 nil nil nil nil nil nil))) + '(48 20 23 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "23,3" t) - '(0 18 23 nil nil nil nil nil nil)))) + '(0 18 23 nil nil nil nil -1 nil)))) (ert-deftest nonstandard-test-time-of-day-decimals () (should (equal (iso8601-parse-time "15:27:35.123" t) - '((35123 . 1000) 27 15 nil nil nil nil nil nil))) + '((35123 . 1000) 27 15 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "15:27:35.123456789" t) - '((35123456789 . 1000000000) 27 15 nil nil nil nil nil nil)))) + '((35123456789 . 1000000000) 27 15 nil nil nil nil -1 nil)))) (ert-deftest standard-test-time-of-day-beginning-of-day () (should (equal (iso8601-parse-time "000000") - '(0 0 0 nil nil nil nil nil nil))) + '(0 0 0 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "00:00:00") - '(0 0 0 nil nil nil nil nil nil))) + '(0 0 0 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "0000") - '(0 0 0 nil nil nil nil nil nil))) + '(0 0 0 nil nil nil nil -1 nil))) (should (equal (iso8601-parse-time "00:00") - '(0 0 0 nil nil nil nil nil nil)))) + '(0 0 0 nil nil nil nil -1 nil)))) (ert-deftest standard-test-time-of-day-utc () (should (equal (iso8601-parse-time "232030Z") @@ -222,9 +222,9 @@ (ert-deftest standard-test-date-and-time-of-day () (should (equal (iso8601-parse "19850412T101530") - '(30 15 10 12 4 1985 nil nil nil))) + '(30 15 10 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse "1985-04-12T10:15:30") - '(30 15 10 12 4 1985 nil nil nil))) + '(30 15 10 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse "1985102T235030Z") '(30 50 23 12 4 1985 nil nil 0))) @@ -232,9 +232,9 @@ '(30 50 23 12 4 1985 nil nil 0))) (should (equal (iso8601-parse "1985W155T235030") - '(30 50 23 12 4 1985 nil nil nil))) + '(30 50 23 12 4 1985 nil -1 nil))) (should (equal (iso8601-parse "1985-W155T23:50:30") - '(30 50 23 12 4 1985 nil nil nil)))) + '(30 50 23 12 4 1985 nil -1 nil)))) (ert-deftest standard-test-interval () ;; A time interval starting at 20 minutes and 50 seconds past 23 @@ -256,48 +256,48 @@ ;; This example doesn't seem valid according to the standard. ;; "0625" is unambiguous, and means "the year 625". Weird. ;; (should (equal (iso8601-parse-interval "19850412/0625") - ;; '((nil nil nil 12 4 1985 nil nil nil) - ;; (nil nil nil nil nil 625 nil nil nil) + ;; '((nil nil nil 12 4 1985 nil -1 nil) + ;; (nil nil nil nil nil 625 nil -1 nil) ;; (0 17 0 22 9 609 5 nil 0)))) ;; A time interval of 2 years, 10 months, 15 days, 10 hours, 20 ;; minutes and 30 seconds. (should (equal (iso8601-parse-duration "P2Y10M15DT10H20M30S") - '(30 20 10 15 10 2 nil nil nil))) + '(30 20 10 15 10 2 nil -1 nil))) (should (equal (iso8601-parse-duration "P00021015T102030") - '(30 20 10 15 10 2 nil nil nil))) + '(30 20 10 15 10 2 nil -1 nil))) (should (equal (iso8601-parse-duration "P0002-10-15T10:20:30") - '(30 20 10 15 10 2 nil nil nil))) + '(30 20 10 15 10 2 nil -1 nil))) ;; A time interval of 1 year and 6 months. (should (equal (iso8601-parse-duration "P1Y6M") - '(0 0 0 0 6 1 nil nil nil))) + '(0 0 0 0 6 1 nil -1 nil))) (should (equal (iso8601-parse-duration "P0001-06") - '(nil nil nil nil 6 1 nil nil nil))) + '(nil nil nil nil 6 1 nil -1 nil))) ;; A time interval of seventy-two hours. (should (equal (iso8601-parse-duration "PT72H") - '(0 0 72 0 0 0 nil nil nil))) + '(0 0 72 0 0 0 nil -1 nil))) ;; Defined by start and duration ;; A time interval of 1 year, 2 months, 15 days and 12 hours, ;; beginning on 12 April 1985 at 20 minutes past 23 hours. (should (equal (iso8601-parse-interval "19850412T232000/P1Y2M15DT12H") - '((0 20 23 12 4 1985 nil nil nil) - (0 20 11 28 6 1986 nil nil nil) - (0 0 12 15 2 1 nil nil nil)))) + '((0 20 23 12 4 1985 nil -1 nil) + (0 20 11 28 6 1986 nil -1 nil) + (0 0 12 15 2 1 nil -1 nil)))) (should (equal (iso8601-parse-interval "1985-04-12T23:20:00/P1Y2M15DT12H") - '((0 20 23 12 4 1985 nil nil nil) - (0 20 11 28 6 1986 nil nil nil) - (0 0 12 15 2 1 nil nil nil)))) + '((0 20 23 12 4 1985 nil -1 nil) + (0 20 11 28 6 1986 nil -1 nil) + (0 0 12 15 2 1 nil -1 nil)))) ;; Defined by duration and end ;; A time interval of 1 year, 2 months, 15 days and 12 hours, ending ;; on 12 April 1985 at 20 minutes past 23 hour. (should (equal (iso8601-parse-interval "P1Y2M15DT12H/19850412T232000") - '((0 20 11 28 1 1984 nil nil nil) - (0 20 23 12 4 1985 nil nil nil) - (0 0 12 15 2 1 nil nil nil))))) + '((0 20 11 28 1 1984 nil -1 nil) + (0 20 23 12 4 1985 nil -1 nil) + (0 0 12 15 2 1 nil -1 nil))))) ;;; iso8601-tests.el ends here