Revert "cal: simplify leap year rule"

It was mistake, we use extra rule for date < 1752 from the beginning
and another calculations depends on this.

This reverts commit b9bd8dc267a71611859496bff29e329868273714.

diff --git a/misc-utils/cal.c b/misc-utils/cal.c
index 70a3d96c4093f3ebe1fea75611a232781b1aa51a..f56b991dc13537c1cbbdc2afec35c357d624a977 100644 (file)
--- a/misc-utils/cal.c
+++ b/misc-utils/cal.c
@@ -531,9 +531,13 @@ int main(int argc, char **argv)
        return EXIT_SUCCESS;
 }
 
+/* leap year -- account for gregorian reformation in 1752 */
 static int leap_year(int32_t year)
 {
-       return ( !(year % 4) && (year % 100) ) || !(year % 400);
+       if (year <= REFORMATION_YEAR)
+               return !(year % 4);
+       else
+               return ( !(year % 4) && (year % 100) ) || !(year % 400);
 }
 
 static void init_monthnames(struct cal_control *ctl)