hardened the addChild function added accessors needed for xmlNode, a bit

* tree.c: hardened the addChild function
* python/generator.py python/libxml.c python/libxml2-python-api.xml
  python/libxml2class.txt python/libxml_wrap.h python/TODO:
  added accessors needed for xmlNode, a bit more testing and
  extension of interfaces
* python/tests/Makefile.am python/tests/build.py: added a test
  build from scratch/save/load/check
Daniel

1 files changed, 8 insertions, 3 deletions

diff --git a/python/libxml_wrap.h b/python/libxml_wrap.h
index 68daf019..679260a3 100644
--- a/python/libxml_wrap.h
+++ b/python/libxml_wrap.h
@@ -15,20 +15,25 @@
 #include <libxml/xinclude.h>
 #include <libxml/xpointer.h>
 
-#define PyxmlNode_Get(v) (((PyxmlNode_Object *)(v))->obj)
+#define PyxmlNode_Get(v) (((v) == Py_None) ? NULL : \
+	(((PyxmlNode_Object *)(v))->obj))
 
 typedef struct {
     PyObject_HEAD
     xmlNodePtr obj;
 } PyxmlNode_Object;
 
-#define PyxmlXPathContext_Get(v) (((PyxmlXPathContext_Object *)(v))->obj)
+#define PyxmlXPathContext_Get(v) (((v) == Py_None) ? NULL : \
+	(((PyxmlXPathContext_Object *)(v))->obj))
+
 typedef struct {
     PyObject_HEAD
     xmlXPathContextPtr obj;
 } PyxmlXPathContext_Object;
 
-#define PyparserCtxt_Get(v) (((PyparserCtxt_Object *)(v))->obj)
+#define PyparserCtxt_Get(v) (((v) == Py_None) ? NULL : \
+        (((PyparserCtxt_Object *)(v))->obj))
+
 typedef struct {
     PyObject_HEAD
     xmlParserCtxtPtr obj;