opcservices: Implement CombinePartUri().

dlls/opcservices/tests/opcservices.c

@@ -1053,19 +1053,25 @@ static void test_combine_uri(void)
         hr = CreateUri(relativeW, Uri_CREATE_ALLOW_RELATIVE, 0, &relative_uri);
         ok(SUCCEEDED(hr), "%u: failed to create relative uri, hr %#x.\n", i, hr);
 
+        combined_uri = (void *)0xdeadbeef;
+        hr = IOpcUri_CombinePartUri(uri, NULL, &combined_uri);
+        ok(hr == E_POINTER, "%u: failed to combine uris, hr %#x.\n", i, hr);
+        ok(!combined_uri, "Unexpected instance.\n");
+
+        hr = IOpcUri_CombinePartUri(uri, relative_uri, NULL);
+        ok(hr == E_POINTER, "%u: failed to combine uris, hr %#x.\n", i, hr);
+
         hr = IOpcUri_CombinePartUri(uri, relative_uri, &combined_uri);
-    todo_wine
         ok(SUCCEEDED(hr), "%u: failed to combine uris, hr %#x.\n", i, hr);
 
-    if (SUCCEEDED(hr))
-    {
         hr = IOpcPartUri_GetRawUri(combined_uri, &str);
         ok(SUCCEEDED(hr), "%u: failed to get raw uri, hr %#x.\n", i, hr);
+    todo_wine_if(i == 2 || i == 3)
         ok(!lstrcmpW(str, combinedW), "%u: unexpected uri %s.\n", i, wine_dbgstr_w(str));
         SysFreeString(str);
 
         IOpcPartUri_Release(combined_uri);
-    }
+
         heap_free(uriW);
         heap_free(relativeW);
         heap_free(combinedW);

dlls/opcservices/uri.c

@@ -357,9 +357,26 @@ static HRESULT WINAPI opc_uri_GetRelativeUri(IOpcPartUri *iface, IOpcPartUri *pa
 
 static HRESULT WINAPI opc_uri_CombinePartUri(IOpcPartUri *iface, IUri *relative_uri, IOpcPartUri **combined)
 {
-    FIXME("iface %p, relative_uri %p, combined %p stub!\n", iface, relative_uri, combined);
+    struct opc_uri *uri = impl_from_IOpcPartUri(iface);
+    IUri *combined_uri;
+    HRESULT hr;
 
-    return E_NOTIMPL;
+    TRACE("iface %p, relative_uri %p, combined %p.\n", iface, relative_uri, combined);
+
+    if (!combined)
+        return E_POINTER;
+
+    *combined = NULL;
+
+    if (!relative_uri)
+        return E_POINTER;
+
+    if (FAILED(hr = CoInternetCombineIUri(uri->uri, relative_uri, 0, &combined_uri, 0)))
+        return hr;
+
+    hr = opc_part_uri_create(combined_uri, NULL, combined);
+    IUri_Release(combined_uri);
+    return hr;
 }
 
 static HRESULT WINAPI opc_uri_ComparePartUri(IOpcPartUri *iface, IOpcPartUri *part_uri,