initial commit of Gregorian/IFC date conversion tools and unit tests

isLeap.m

@@ -0,0 +1,30 @@
+function flag = isLeap(Year)
+arguments (Input)
+    Year (:, 1) uint16
+end
+arguments (Output)
+    flag (:, 1) logical
+end
+
+% flag = NaN(size(Year));
+
+isDivisibleBy4 = ~mod(Year, 4);
+isNotDivisibleBy100 = logical(mod(Year, 100));
+isDivisibleBy400 = ~mod(Year, 400);
+
+flag = isDivisibleBy4 & (isDivisibleBy400 | isNotDivisibleBy100);
+
+% if ~mod(Year, 4)
+%     if ~mod(Year, 100) 
+%         if ~mod(Year, 400)
+%             flag = true;
+%         else
+%             flag = false;
+%         end
+%     else
+%         flag = true;
+%     end
+% else
+%     flag = false;
+% end
+end