Re: [3/5] msxml3/xsl: Basic put_input() method for IXSLProcessor

[Jacek Caban]

Hi Nikolay,

On 2/14/11 9:04 PM, Nikolay Sivov wrote:
> Basic put_input() method for IXSLProcessor

+    IXMLDOMNode *old_input = This->input;
+    HRESULT hr;

-    FIXME("(%p): stub\n", This);
-    return E_NOTIMPL;
+    TRACE("(%p)->(type=%d)\n", This, V_VT(&input));
+
+    /* try IXMLDOMNode directly first */
+    if (V_VT(&input) == VT_UNKNOWN)
+        hr = IUnknown_QueryInterface(V_UNKNOWN(&input),&IID_IXMLDOMNode, (void**)&This->input);
+    else if (V_VT(&input) == VT_DISPATCH)
+        hr = IDispatch_QueryInterface(V_DISPATCH(&input),&IID_IXMLDOMNode, (void**)&This->input);
+
+    if (hr != S_OK)
+    {
+        IXMLDOMDocument *doc;
+
+        hr = DOMDocument_create(&CLSID_DOMDocument, NULL, (void**)&doc);
+        if (hr == S_OK)
+        {
+            hr = IXMLDOMDocument_QueryInterface(doc,&IID_IXMLDOMNode, (void**)&This->input);
+            IXMLDOMDocument_Release(doc);
+        }
+    }
+
+    if (hr == S_OK&&  old_input) IXMLDOMNode_Release(old_input);

Failure of QueryInterface call will set This->input to NULL (you probably want it not changed and even if not, that's a leak). It's probably better idea to have local pointer to the new input instead of old one and change it once you know the function will succeed.

Jacek