Added object_setClass

objc/runtime.h

@@ -225,6 +225,7 @@ void *object_getIndexedIvars(id obj);
 id object_dispose(id obj);
 
 Class object_getClass(id obj);
+Class object_setClass(id obj, Class cls);
 
 const char *object_getClassName(id obj);
 

runtime.c

@@ -765,6 +765,17 @@ Class object_getClass(id obj)
 	return Nil;
 }
 
+Class object_setClass(id obj, Class cls)
+{
+	if (nil != obj)
+	{
+		Class oldClass =  obj->isa;
+		obj->isa = cls;
+		return oldClass;
+	}
+	return Nil;
+}
+
 const char *object_getClassName(id obj)
 {
 	return class_getName(object_getClass(obj));