From 0d6e5db80a7adf84b972d8eadd3ba7a2a1c52b99 Mon Sep 17 00:00:00 2001
From: Georg Hopp <georg@steffers.org>
Date: Sun, 10 Nov 2013 02:39:44 +0000
Subject: [PATCH] add function to create an object with a va_list pointer
 instead of its argument list. Obviously the va_list must contain the correct
 values for the class constructor.

---
 include/class/interface/class.h |  7 +++++++
 src/class/interface/i_class.c   | 20 +++++++++++++++-----
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/include/class/interface/class.h b/include/class/interface/class.h
index 98cbdbd..721af7b 100644
--- a/include/class/interface/class.h
+++ b/include/class/interface/class.h
@@ -52,6 +52,13 @@ extern void * classClone(void *);
 #define delete(object)		classDelete((void **)&(object))
 #define clone(object)		classClone((void *)(object))
 
+/**
+ * With this one we can create a new instance via a
+ * intermidiary that gets the arguments.
+ */
+extern void * classNewParams(class_ptr, va_list *);
+#define newParams(class,args) classNewParams(_##class, args)
+
 #endif // __CLASS_INTERFACE_CLASS_H__
 
 // vim: set ts=4 sw=4:
diff --git a/src/class/interface/i_class.c b/src/class/interface/i_class.c
index 196363d..25b1608 100644
--- a/src/class/interface/i_class.c
+++ b/src/class/interface/i_class.c
@@ -37,18 +37,15 @@ struct interface i_Class = {
 };
 
 void *
-classNew(class_ptr class, ...)
+classNewParams(class_ptr class, va_list * params)
 {
 	void *  object = memCalloc(1, class->object_size + sizeof(void*));
-	va_list params;
 	int     ret;
 
 	* (class_ptr *)object = class;
 	object += sizeof(void*);
 
-	va_start(params, class);
-	RETCALL(object, Class, ctor, ret, &params);
-	va_end(params);
+	RETCALL(object, Class, ctor, ret, params);
 
 	if (-1 == ret) {
 		classDelete(&object);
@@ -57,6 +54,19 @@ classNew(class_ptr class, ...)
 	return object;
 }
 
+void *
+classNew(class_ptr class, ...)
+{
+	va_list   params;
+	void    * object;
+
+	va_start(params, class);
+	object = classNewParams(class, &params);
+	va_end(params);
+
+	return object;
+}
+
 void
 classDelete(void ** object)
 {