dinput: Fix some return values of IDirectInput::QueryInterface.

dlls/dinput/dinput_main.c

@@ -421,6 +421,9 @@ static HRESULT WINAPI IDirectInputAImpl_QueryInterface(LPDIRECTINPUT7A iface, RE
 
     TRACE( "(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppobj );
 
+    if (!riid || !ppobj)
+        return E_POINTER;
+
     if (IsEqualGUID( &IID_IUnknown, riid ) ||
         IsEqualGUID( &IID_IDirectInputA,  riid ) ||
         IsEqualGUID( &IID_IDirectInput2A, riid ) ||
@@ -459,7 +462,8 @@ static HRESULT WINAPI IDirectInputAImpl_QueryInterface(LPDIRECTINPUT7A iface, RE
     }
 
     FIXME( "Unsupported interface: %s\n", debugstr_guid(riid));
-    return E_FAIL;
+    *ppobj = NULL;
+    return E_NOINTERFACE;
 }
 
 static HRESULT WINAPI IDirectInputWImpl_QueryInterface(LPDIRECTINPUT7W iface, REFIID riid, LPVOID *ppobj)

dlls/dinput/tests/device.c

@@ -23,7 +23,6 @@
 
 #include "wine/test.h"
 #include "windef.h"
-#include "initguid.h"
 #include "dinput.h"
 
 static const DIOBJECTDATAFORMAT obj_data_format[] = {

dlls/dinput/tests/dinput.c

@@ -19,6 +19,7 @@
 #define DIRECTINPUT_VERSION 0x0700
 
 #define COBJMACROS
+#include <initguid.h>
 #include <windows.h>
 #include <dinput.h>
 
@@ -26,6 +27,86 @@
 
 HINSTANCE hInstance;
 
+static void test_QueryInterface(void)
+{
+    static const REFIID iid_list[] = {&IID_IUnknown, &IID_IDirectInputA, &IID_IDirectInputW,
+                                      &IID_IDirectInput2A, &IID_IDirectInput2W,
+                                      &IID_IDirectInput7A, &IID_IDirectInput7W};
+
+    static const struct
+    {
+        REFIID riid;
+        int test_todo;
+    } no_interface_list[] =
+    {
+        {&IID_IDirectInput8A, 1},
+        {&IID_IDirectInput8W, 1},
+        {&IID_IDirectInputDeviceA},
+        {&IID_IDirectInputDeviceW},
+        {&IID_IDirectInputDevice2A},
+        {&IID_IDirectInputDevice2W},
+        {&IID_IDirectInputDevice7A},
+        {&IID_IDirectInputDevice7W},
+        {&IID_IDirectInputDevice8A},
+        {&IID_IDirectInputDevice8W},
+        {&IID_IDirectInputEffect},
+    };
+
+    IDirectInputA *pDI;
+    HRESULT hr;
+    IUnknown *pUnk;
+    int i;
+
+    hr = DirectInputCreateA(hInstance, DIRECTINPUT_VERSION, &pDI, NULL);
+    if (FAILED(hr))
+    {
+        win_skip("Failed to instantiate a IDirectInputA instance: 0x%08x\n", hr);
+        return;
+    }
+
+    hr = IDirectInput_QueryInterface(pDI, NULL, NULL);
+    ok(hr == E_POINTER, "IDirectInput_QueryInterface returned 0x%08x\n", hr);
+
+    pUnk = (void *)0xdeadbeef;
+    hr = IDirectInput_QueryInterface(pDI, NULL, (void **)&pUnk);
+    ok(hr == E_POINTER, "IDirectInput_QueryInterface returned 0x%08x\n", hr);
+    ok(pUnk == (void *)0xdeadbeef, "Output interface pointer is %p\n", pUnk);
+
+    hr = IDirectInput_QueryInterface(pDI, &IID_IUnknown, NULL);
+    ok(hr == E_POINTER, "IDirectInput_QueryInterface returned 0x%08x\n", hr);
+
+    for (i = 0; i < sizeof(iid_list)/sizeof(iid_list[0]); i++)
+    {
+        pUnk = NULL;
+        hr = IDirectInput_QueryInterface(pDI, iid_list[i], (void **)&pUnk);
+        ok(hr == S_OK, "[%d] IDirectInput_QueryInterface returned 0x%08x\n", i, hr);
+        ok(pUnk != NULL, "[%d] Output interface pointer is NULL\n", i);
+        if (pUnk) IUnknown_Release(pUnk);
+    }
+
+    for (i = 0; i < sizeof(no_interface_list)/sizeof(no_interface_list[0]); i++)
+    {
+        pUnk = (void *)0xdeadbeef;
+        hr = IDirectInput_QueryInterface(pDI, no_interface_list[i].riid, (void **)&pUnk);
+        if (no_interface_list[i].test_todo)
+        {
+            todo_wine
+            ok(hr == E_NOINTERFACE, "[%d] IDirectInput_QueryInterface returned 0x%08x\n", i, hr);
+            todo_wine
+            ok(pUnk == NULL, "[%d] Output interface pointer is %p\n", i, pUnk);
+
+            if (pUnk) IUnknown_Release(pUnk);
+        }
+        else
+        {
+            ok(hr == E_NOINTERFACE, "[%d] IDirectInput_QueryInterface returned 0x%08x\n", i, hr);
+            ok(pUnk == NULL, "[%d] Output interface pointer is %p\n", i, pUnk);
+        }
+    }
+
+    IDirectInput_Release(pDI);
+}
+
 static void test_RunControlPanel(void)
 {
     IDirectInputA *pDI;
@@ -64,6 +145,7 @@ START_TEST(dinput)
     hInstance = GetModuleHandleA(NULL);
 
     CoInitialize(NULL);
+    test_QueryInterface();
     test_RunControlPanel();
     CoUninitialize();
 }