X-Git-Url: https://git.madduck.net/etc/awesome.git/blobdiff_plain/38cb1f49b0e0be7018298018bb69e8fa3f785ad9..b6912d6d22b3c6fc635e602412bdb83884630a38:/luatz/timetable.lua

diff --git a/luatz/timetable.lua b/luatz/timetable.lua
index 7058d7f..0dbf4c8 100644
--- a/luatz/timetable.lua
+++ b/luatz/timetable.lua
@@ -1,8 +1,16 @@
 local strftime = require "luatz.strftime".strftime
 local strformat = string.format
 local floor = math.floor
-local function idiv ( n , d )
-	return floor ( n / d )
+local idiv do
+	-- Try and use actual integer division when available (Lua 5.3+)
+	local idiv_loader = (loadstring or load)([[return function(n,d) return n//d end]], "idiv") -- luacheck: ignore 113
+	if idiv_loader then
+		idiv = idiv_loader()
+	else
+		idiv = function(n, d)
+			return floor(n/d)
+		end
+	end
 end
 
 
@@ -68,8 +76,8 @@ local function carry ( tens , units , base )
 		tens  = tens + idiv ( units , base )
 		units = units % base
 	elseif units < 0 then
-		tens  = tens - 1 + idiv ( -units , base )
-		units = base - ( -units % base )
+		tens  = tens + idiv ( units , base )
+		units = ( base + units ) % base
 	end
 	return tens , units
 end
@@ -171,8 +179,9 @@ function timetable_methods:timestamp ( )
 end
 
 function timetable_methods:rfc_3339 ( )
-	local year , month , day , hour , min , sec = self:unpack ( )
-	local sec , msec = borrow ( sec , 0 , 1000 )
+	local year, month, day, hour, min, fsec = self:unpack()
+	local sec, msec = borrow(fsec, 0, 1000)
+	msec = math.floor(msec)
 	return strformat ( "%04u-%02u-%02uT%02u:%02u:%02d.%03d" , year , month , day , hour , min , sec , msec )
 end