From afb1a08b5f501dc555d254146a5b06b06dade051 Mon Sep 17 00:00:00 2001
From: Huw Davies <huw@codeweavers.com>
Date: Fri, 19 Mar 2010 14:17:45 +0000
Subject: [PATCH] dispex: Use the upper WORD of the flags parameter to indicate
 whether the optional [out] parameters are NULL.

---
 dlls/dispex/tests/marshal.c |  3 ---
 dlls/dispex/usrmarshal.c    | 32 ++++++++++++++++++++------------
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/dlls/dispex/tests/marshal.c b/dlls/dispex/tests/marshal.c
index e0b7127cfbd..847f54eb421 100644
--- a/dlls/dispex/tests/marshal.c
+++ b/dlls/dispex/tests/marshal.c
@@ -244,9 +244,7 @@ static HRESULT WINAPI dispex_InvokeEx(IDispatchEx* iface,
     if(id == 1)
     {
         ok(pdp->cArgs == 0, "got %d\n", pdp->cArgs);
-todo_wine
         ok(pei == NULL, "got non-NULL excepinfo\n");
-todo_wine
         ok(pvarRes == NULL, "got non-NULL result\n");
     }
     else if(id == 2)
@@ -266,7 +264,6 @@ todo_wine
     }
     else if(id == 4)
     {
-todo_wine
         ok(wFlags == 0xf, "got %04x\n", wFlags);
     }
     return S_OK;
diff --git a/dlls/dispex/usrmarshal.c b/dlls/dispex/usrmarshal.c
index cdb1b03da8b..c8c3563aae5 100644
--- a/dlls/dispex/usrmarshal.c
+++ b/dlls/dispex/usrmarshal.c
@@ -37,6 +37,9 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(ole);
 
+#define NULL_RESULT    0x20000
+#define NULL_EXCEPINFO 0x40000
+
 HRESULT CALLBACK IDispatchEx_InvokeEx_Proxy(IDispatchEx* This, DISPID id, LCID lcid, WORD wFlags,
                                             DISPPARAMS *pdp, VARIANT *pvarRes, EXCEPINFO *pei,
                                             IServiceProvider *pspCaller)
@@ -47,12 +50,22 @@ HRESULT CALLBACK IDispatchEx_InvokeEx_Proxy(IDispatchEx* This, DISPID id, LCID l
     UINT byref_args, arg;
     VARIANT dummy_arg, *ref_arg = &dummy_arg, *copy_arg, *orig_arg = NULL;
     UINT *ref_idx = NULL;
+    DWORD dword_flags = wFlags & 0xf;
 
     TRACE("(%p)->(%08x, %04x, %04x, %p, %p, %p, %p)\n", This, id, lcid, wFlags,
           pdp, pvarRes, pei, pspCaller);
 
-    if(!pvarRes) pvarRes = &result;
-    if(!pei) pei = &excep_info;
+    if(!pvarRes)
+    {
+        pvarRes = &result;
+        dword_flags |= NULL_RESULT;
+    }
+
+    if(!pei)
+    {
+        pei = &excep_info;
+        dword_flags |= NULL_EXCEPINFO;
+    }
 
     for(arg = 0, byref_args = 0; arg < pdp->cArgs; arg++)
         if(V_ISBYREF(pdp->rgvarg + arg)) byref_args++;
@@ -86,7 +99,7 @@ HRESULT CALLBACK IDispatchEx_InvokeEx_Proxy(IDispatchEx* This, DISPID id, LCID l
         pdp->rgvarg = copy_arg;
     }
 
-    hr = IDispatchEx_RemoteInvokeEx_Proxy(This, id, lcid, wFlags, pdp, pvarRes, pei, pspCaller,
+    hr = IDispatchEx_RemoteInvokeEx_Proxy(This, id, lcid, dword_flags, pdp, pvarRes, pei, pspCaller,
                                           byref_args, ref_idx, ref_arg);
 
     if(byref_args)
@@ -95,14 +108,6 @@ HRESULT CALLBACK IDispatchEx_InvokeEx_Proxy(IDispatchEx* This, DISPID id, LCID l
         pdp->rgvarg = orig_arg;
     }
 
-    if(pvarRes == &result) VariantClear(pvarRes);
-    if(pei == &excep_info)
-    {
-        SysFreeString(pei->bstrSource);
-        SysFreeString(pei->bstrDescription);
-        SysFreeString(pei->bstrHelpFile);
-    }
-
     return hr;
 }
 
@@ -123,7 +128,10 @@ HRESULT __RPC_STUB IDispatchEx_InvokeEx_Stub(IDispatchEx* This, DISPID id, LCID
     for(arg = 0; arg < byref_args; arg++)
         pdp->rgvarg[ref_idx[arg]] = ref_arg[arg];
 
-    hr = IDispatchEx_InvokeEx(This, id, lcid, dwFlags, pdp, result, pei, pspCaller);
+    if(dwFlags & NULL_RESULT) result = NULL;
+    if(dwFlags & NULL_EXCEPINFO) pei = NULL;
+
+    hr = IDispatchEx_InvokeEx(This, id, lcid, dwFlags & 0xffff, pdp, result, pei, pspCaller);
 
     for(arg = 0; arg < byref_args; arg++)
         VariantInit(pdp->rgvarg + ref_idx[arg]);