Fix GH-16258 overflow on jddayofweek argument.

Author: devnexen

ext/calendar/dow.c

@@ -35,6 +35,10 @@ int DayOfWeek(
 {
 	int dow;
 
+	if ((sdn + 1) > INT_MAX) {
+		return (0);
+	}
+
 	dow = (sdn + 1) % 7;
 	if (dow >= 0) {
 		return (dow);

ext/calendar/tests/bug53574_2.phpt

@@ -25,7 +25,7 @@ array(9) {
   ["year"]=>
   int(0)
   ["dow"]=>
-  int(3)
+  int(0)
   ["abbrevdayname"]=>
   string(3) "Wed"
   ["dayname"]=>

ext/calendar/tests/gh16258.phpt

@@ -0,0 +1,12 @@
+--TEST--
+GH-16258 (jddayofweek overflow on argument)
+--EXTENSIONS--
+calendar
+--FILE--
+<?php
+jddayofweek(9223372036854775807, 1);
+jddayofweek(-9223372036854775806, 1);
+echo "DONE";
+?>
+--EXPECT--
+DONE