src/timetable: Fix timestamp function; add test

[etc/awesome.git] / src / timetable.lua

diff --git a/src/timetable.lua b/src/timetable.lua
index b58ad0f531cc8386904e5aca72a8d21445126e44..e7f28167cb7bf87c58ccc38d79b72d2638abf23f 100644 (file)
--- a/src/timetable.lua
+++ b/src/timetable.lua
@@ -102,12 +102,16 @@ local function normalise ( year , month , day , hour , min , sec )
        return year , month , day , hour , min , sec
 end
 
+local leap_years_since_1970 = leap_years_since ( 1970 )
 local function timestamp ( year , month , day , hour , min , sec )
-       return 60*60*24*(
-                       year * year_length ( year )
-                       + month * month_length ( month , year )
-                       + day
-               )
+       year , month , day , hour , min , sec = normalise ( year , month , day , hour , min , sec )
+
+       local days_since_epoch = day_of_year ( day , month , year )
+               + 365 * ( year - 1970 )
+               -- Each leap year adds one day
+               + ( leap_years_since ( year - 1 ) - leap_years_since_1970 ) - 1
+
+       return days_since_epoch * 60*60*24
                + hour  * (60*60)
                + min   * 60
                + sec