Change the interface a bit -- leave unspecified as nil

lisp/calendar/iso8601.el

@@ -148,7 +148,7 @@ well as variants like \"2008W32\" (week number) and
                              (string-to-number (match-string 4 string))))
            (jan-start (decoded-time-weekday
                        (decode-time
-                        (encode-time
+                        (iso8601--encode-time
                          (iso8601--decoded-time :year year
                                                 :month 1
                                                 :day 4)))))
@@ -291,14 +291,14 @@ Return the number of minutes."
                                             duration))))
     (list start end
           (or duration
-              (decode-time (time-subtract (encode-time end)
-                                          (encode-time start))
+              (decode-time (time-subtract (iso8601--encode-time end)
+                                          (iso8601--encode-time start))
                            (decoded-time-zone end))))))
 
 (defun iso8601--match (regexp string)
   (string-match (concat "\\`" regexp "\\'") string))
 
-(defun iso8601--value (elem default)
+(defun iso8601--value (elem &optional default)
   (if (stringp elem)
       (string-to-number elem)
     (or elem default)))
@@ -306,16 +306,34 @@ Return the number of minutes."
 (cl-defun iso8601--decoded-time (&key second minute hour
                                       day month year
                                       dst zone)
-  (list (iso8601--value second 0)
-        (iso8601--value minute 0)
-        (iso8601--value hour 0)
-        (iso8601--value day 1)
-        (iso8601--value month 1)
-        (iso8601--value year 0)
+  (list (iso8601--value second)
+        (iso8601--value minute)
+        (iso8601--value hour)
+        (iso8601--value day)
+        (iso8601--value month)
+        (iso8601--value year)
         nil
         dst
         zone))
 
+(defun iso8601--encode-time (time)
+  "Like `encode-time', but fill in nil values in TIME."
+  (setq time (copy-sequence time))
+  (unless (decoded-time-second time)
+    (setf (decoded-time-second time) 0))
+  (unless (decoded-time-minute time)
+    (setf (decoded-time-minute time) 0))
+  (unless (decoded-time-hour time)
+    (setf (decoded-time-hour time) 0))
+
+  (unless (decoded-time-day time)
+    (setf (decoded-time-day time) 1))
+  (unless (decoded-time-month time)
+    (setf (decoded-time-month time) 1))
+  (unless (decoded-time-year time)
+    (setf (decoded-time-year time) 0))
+  (encode-time time))
+
 (provide 'iso8601)
 
 ;;; iso8601.el ends here

test/lisp/calendar/iso8601-tests.el

@@ -24,45 +24,45 @@
 
 (ert-deftest test-iso8601-date-years ()
   (should (equal (iso8601-parse-date "1985")
-                 '(0 0 0 1 1 1985 nil nil nil)))
+                 '(nil nil nil nil nil 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "-0003")
-                 '(0 0 0 1 1 -4 nil nil nil)))
+                 '(nil nil nil nil nil -4 nil nil nil)))
   (should (equal (iso8601-parse-date "+1985")
-                 '(0 0 0 1 1 1985 nil nil nil))))
+                 '(nil nil nil nil nil 1985 nil nil nil))))
 
 (ert-deftest test-iso8601-date-dates ()
   (should (equal (iso8601-parse-date "1985-03-14")
-                 '(0 0 0 14 3 1985 nil nil nil)))
+                 '(nil nil nil 14 3 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "19850314")
-                 '(0 0 0 14 3 1985 nil nil nil)))
+                 '(nil nil nil 14 3 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "1985-02")
-                 '(0 0 0 1 2 1985 nil nil nil))))
+                 '(nil nil nil nil 2 1985 nil nil nil))))
 
 (ert-deftest test-iso8601-date-obsolete ()
   (should (equal (iso8601-parse-date "--02-01")
-                 '(0 0 0 1 2 0 nil nil nil)))
+                 '(nil nil nil 1 2 nil nil nil nil)))
   (should (equal (iso8601-parse-date "--0201")
-                 '(0 0 0 1 2 0 nil nil nil))))
+                 '(nil nil nil 1 2 nil nil nil nil))))
 
 (ert-deftest test-iso8601-date-weeks ()
   (should (equal (iso8601-parse-date "2008W39-6")
-                 '(0 0 0 27 9 2008 nil nil nil)))
+                 '(nil nil nil 27 9 2008 nil nil nil)))
   (should (equal (iso8601-parse-date "2009W01-1")
-                 '(0 0 0 29 12 2008 nil nil nil)))
+                 '(nil nil nil 29 12 2008 nil nil nil)))
   (should (equal (iso8601-parse-date "2009W53-7")
-                 '(0 0 0 3 1 2010 nil nil nil))))
+                 '(nil nil nil 3 1 2010 nil nil nil))))
 
 (ert-deftest test-iso8601-date-ordinals ()
   (should (equal (iso8601-parse-date "1981-095")
-                 '(0 0 0 5 4 1981 nil nil nil))))
+                 '(nil nil nil 5 4 1981 nil nil nil))))
 
 (ert-deftest test-iso8601-time ()
   (should (equal (iso8601-parse-time "13:47:30")
-                 '(30 47 13 1 1 0 nil nil nil)))
+                 '(30 47 13 nil nil nil nil nil nil)))
   (should (equal (iso8601-parse-time "134730")
-                 '(30 47 13 1 1 0 nil nil nil)))
+                 '(30 47 13 nil nil nil nil nil nil)))
   (should (equal (iso8601-parse-time "1347")
-                 '(0 47 13 1 1 0 nil nil nil))))
+                 '(0 47 13 nil nil nil nil nil nil))))
 
 (ert-deftest test-iso8601-combined ()
   (should (equal (iso8601-parse "2008-03-02T13:47:30")
@@ -109,37 +109,48 @@
 
 (ert-deftest standard-test-dates ()
   (should (equal (iso8601-parse-date "19850412")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "1985-04-12")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "1985102")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "1985-102")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "1985W155")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "1985-W15-5")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "1985W15")
-                 '(0 0 0 7 4 1985 nil nil nil)))
+                 '(nil nil nil 7 4 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "1985-W15")
-                 '(0 0 0 7 4 1985 nil nil nil)))
+                 '(nil nil nil 7 4 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "1985-04")
-                 '(0 0 0 1 4 1985 nil nil nil)))
+                 '(nil nil nil nil 4 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "1985")
-                 '(0 0 0 1 1 1985 nil nil nil)))
+                 '(nil nil nil nil nil 1985 nil nil nil)))
 
   (should (equal (iso8601-parse-date "+1985-04-12")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil)))
   (should (equal (iso8601-parse-date "+19850412")
-                 '(0 0 0 12 4 1985 nil nil nil)))
+                 '(nil nil nil 12 4 1985 nil nil nil))))
 
-  )
+(ert-deftest standard-test-time-of-day ()
+  (should (equal (iso8601-parse-time "152746")
+                 '(46 27 15 nil nil nil nil nil nil)))
+  (should (equal (iso8601-parse-time "15:27:46")
+                 '(46 27 15 nil nil nil nil nil nil)))
 
+  (should (equal (iso8601-parse-time "1528")
+                 '(0 28 15 nil nil nil nil nil nil)))
+  (should (equal (iso8601-parse-time "15:28")
+                 '(0 28 15 nil nil nil nil nil nil)))
+
+  (should (equal (iso8601-parse-time "15")
+                 '(0 0 15 nil nil nil nil nil nil))))
 
 ;;; iso8601-tests.el ends here