Added two new helpers date_comp, sql_date_comp.

diff --git a/includes/date_functions.inc b/includes/date_functions.inc
index 4d0fd5f89c3f1ed8b61af6deca87a7a7fd7ac3e4..623452e229c607c116a381f97721dd237f665992 100644 (file)
--- a/includes/date_functions.inc
+++ b/includes/date_functions.inc
@@ -421,6 +421,38 @@ and converts to a yyyy/mm/dd format */
        return sprintf("%04d-%02d-%02d", $year, $month, $day);
 }// end of function
 
+/**
+ *     Compare dates in sql format.
+ *     Return +1 if sql date1>date2, -1 if date1<date2,
+ *  or 0 if dates are equal.
+ */
+function sql_date_comp($date1, $date2)
+{
+       @list($year1, $month1, $day1) = explode("-", $date1);
+       @list($year2, $month2, $day2) = explode("-", $date2);
+
+       if ($year1 != $year2) {
+               return $year1 < $year2 ? -1 : +1;
+    }
+    elseif ($month1 != $month2) {
+               return $month1 < $month2 ? -1 : +1;
+       }
+       elseif ($day1 != $day2) {
+               return $day1 < $day2 ? -1 : +1;
+       }
+       return 0;
+}
+/*
+       Compare dates in user format.
+*/
+function date_comp($date1, $date2)
+{
+       $date1 = date2sql($date1);
+       $date2 = date2sql($date2);
+
+       return sql_date_comp($date1, $date2);
+}
+
 function date1_greater_date2 ($date1, $date2) 
 {
 
@@ -453,7 +485,6 @@ function date1_greater_date2 ($date1, $date2)
        return 0;
 }
 
-
 function date_diff2 ($date1, $date2, $period) 
 {