From 9c98b3c16041ebd41aabbb82e71d424a940a1d47 Mon Sep 17 00:00:00 2001
From: Sebastian Geerken <devnull@localhost>
Date: Tue, 5 Mar 2013 11:34:03 +0100
Subject: Comparable is now subclass of Object (not pseudo-interface anymore).
 The old solution would have made RTTI neccessary to work correctly.

---
 lout/object.cc | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'lout/object.cc')

diff --git a/lout/object.cc b/lout/object.cc
index 85a908b9..059564c0 100644
--- a/lout/object.cc
+++ b/lout/object.cc
@@ -106,6 +106,29 @@ size_t Object::sizeOf()
    return sizeof(Object*);
 }
 
+// ----------------
+//    Comparable
+// ----------------
+
+/**
+ * \brief This static method may be used as compare function for qsort(3), for
+ *    an array of Object* (Object*[] or Object**).
+ */
+int Comparable::compareFun(const void *p1, const void *p2)
+{
+   Comparable *c1 = *(Comparable**)p1;
+   Comparable *c2 = *(Comparable**)p2;
+
+   if (c1 && c2)
+      return ((c1)->compareTo(c2));
+   else if (c1)
+      return 1;
+   else if (c2)
+      return -1;
+   else
+      return 0;
+}
+
 // -------------
 //    Pointer
 // -------------
-- 
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