Added CountDescendants().

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4174 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KPartition.h

@@ -130,6 +130,7 @@ public:
 	bool RemoveAllChildren();
 	KPartition *ChildAt(int32 index) const;
 	int32 CountChildren() const;
+	int32 CountDescendants() const;
 
 	// Shadow Partition
 

src/kernel/core/disk_device_manager/KPartition.cpp

@@ -656,6 +656,16 @@ KPartition::CountChildren() const
 	return fPartitionData.child_count;
 }
 
+// CountDescendants
+int32
+KPartition::CountDescendants() const
+{
+	int32 count = 1;
+	for (int32 i = 0; KPartition *child = ChildAt(i); i++)
+		count += child->CountDescendants();
+	return count;
+}
+
 // CreateShadowPartition
 status_t
 KPartition::CreateShadowPartition()