Marcus Meissner : ddraw: Tighten up checks in DuplicateSurface (Coverity).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a58f31dd27654400eb75242912a2067f64bc6984
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=a58f31dd27654400eb75242912a2067f64bc6984

Author: Marcus Meissner <marcus at jet.franken.de>
Date:   Sun Jul 25 20:13:02 2010 +0200

ddraw: Tighten up checks in DuplicateSurface (Coverity).

---

 dlls/ddraw/ddraw.c |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/dlls/ddraw/ddraw.c b/dlls/ddraw/ddraw.c
index e55ac5b..502cc84 100644
--- a/dlls/ddraw/ddraw.c
+++ b/dlls/ddraw/ddraw.c
@@ -4052,11 +4052,11 @@ static HRESULT WINAPI ddraw3_DuplicateSurface(IDirectDraw3 *iface,
     HRESULT hr;
 
     TRACE("iface %p, src %p, dst %p.\n", iface, src, dst);
-
-    src7 = src ? (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src) : NULL;
+    src7 = (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src);
     hr = ddraw7_DuplicateSurface((IDirectDraw7 *)ddraw_from_ddraw3(iface), src7, &dst7);
-    *dst = dst7 ? (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl : NULL;
-
+    if (!SUCCEEDED(hr))
+        return hr;
+    *dst = (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl;
     return hr;
 }
 
@@ -4067,11 +4067,11 @@ static HRESULT WINAPI ddraw2_DuplicateSurface(IDirectDraw2 *iface,
     HRESULT hr;
 
     TRACE("iface %p, src %p, dst %p.\n", iface, src, dst);
-
-    src7 = src ? (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src) : NULL;
+    src7 = (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src);
     hr = ddraw7_DuplicateSurface((IDirectDraw7 *)ddraw_from_ddraw2(iface), src7, &dst7);
-    *dst = dst7 ? (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl : NULL;
-
+    if (!SUCCEEDED(hr))
+        return hr;
+    *dst = (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl;
     return hr;
 }
 
@@ -4082,11 +4082,11 @@ static HRESULT WINAPI ddraw1_DuplicateSurface(IDirectDraw *iface,
     HRESULT hr;
 
     TRACE("iface %p, src %p, dst %p.\n", iface, src, dst);
-
-    src7 = src ? (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src) : NULL;
+    src7 = (IDirectDrawSurface7 *)surface_from_surface3((IDirectDrawSurface3 *)src);
     hr = ddraw7_DuplicateSurface((IDirectDraw7 *)ddraw_from_ddraw1(iface), src7, &dst7);
-    *dst = dst7 ? (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl : NULL;
-
+    if (!SUCCEEDED(hr))
+        return hr;
+    *dst = (IDirectDrawSurface *)&((IDirectDrawSurfaceImpl *)dst7)->IDirectDrawSurface3_vtbl;
     return hr;
 }