1 files changed, 13 insertions, 1 deletions
diff --git a/tools/listiter.h b/tools/listiter.h
index 9c88940e..e16353cb 100644
--- a/tools/listiter.h
+++ b/tools/listiter.h
@@ -4,7 +4,7 @@
  * See the main source file 'xineliboutput.c' for copyright information and
  * how to reach the author.
  *
- * $Id: listiter.h,v 1.1 2006-06-03 10:04:27 phintuka Exp $
+ * $Id: listiter.h,v 1.2 2010-02-03 13:58:05 phintuka Exp $
  *
  */
 
@@ -68,6 +68,18 @@ RESULT ForEach(LIST& List, RESULT (ITEM::*f)(ARG1,ARG2,ARG3),
   return result;
 }
 
+template <class LIST, class ITEM, class ARG1, class ARG2, class ARG3, class ARG4,
+          class RESULT>
+  RESULT ForEach(LIST& List, RESULT (ITEM::*f)(ARG1,ARG2,ARG3,ARG4),
+                 ARG1 arg1, ARG2 arg2, ARG3 arg3, ARG4 arg4,
+                 RESULT (*combiner)(RESULT,RESULT), RESULT def)
+{
+  RESULT result = def;
+  for(ITEM *it = List.First(); it; it = List.Next(it))
+    result = (*combiner)((*it.*f)(arg1,arg2,arg3,arg4),result);
+  return result;
+}
+
 template<class T>
 T mmin(T a, T b) {return a<b ? a : b;}