Vitaliy Margolen : dinput: COM cleanup - use helper function instead of direct typecast in Linux joystick .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a1b08e5d049aeeeb440cff0915827227bb6f4c45
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=a1b08e5d049aeeeb440cff0915827227bb6f4c45

Author: Vitaliy Margolen <wine-patches at kievinfo.com>
Date:   Sun Jan  9 15:43:41 2011 -0700

dinput: COM cleanup - use helper function instead of direct typecast in Linux joystick.

---

 dlls/dinput/joystick_linux.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/dlls/dinput/joystick_linux.c b/dlls/dinput/joystick_linux.c
index 1eb71ff..fb13722 100644
--- a/dlls/dinput/joystick_linux.c
+++ b/dlls/dinput/joystick_linux.c
@@ -99,6 +99,15 @@ struct JoystickImpl
         POINTL                          povs[4];
 };
 
+static inline JoystickImpl *impl_from_IDirectInputDevice8A(IDirectInputDevice8A *iface)
+{
+    return (JoystickImpl *) iface;
+}
+static inline JoystickImpl *impl_from_IDirectInputDevice8W(IDirectInputDevice8W *iface)
+{
+    return (JoystickImpl *) iface;
+}
+
 static const GUID DInput_Wine_Joystick_GUID = { /* 9e573ed9-7734-11d2-8d4a-23903fb6bdf7 */
   0x9e573ed9,
   0x7734,
@@ -495,7 +504,7 @@ const struct dinput_device joystick_linux_device = {
   */
 static HRESULT WINAPI JoystickLinuxAImpl_Acquire(LPDIRECTINPUTDEVICE8A iface)
 {
-    JoystickImpl *This = (JoystickImpl *)iface;
+    JoystickImpl *This = impl_from_IDirectInputDevice8A(iface);
     HRESULT res;
 
     TRACE("(%p)\n",This);
@@ -524,7 +533,7 @@ static HRESULT WINAPI JoystickLinuxAImpl_Acquire(LPDIRECTINPUTDEVICE8A iface)
   */
 static HRESULT WINAPI JoystickLinuxAImpl_Unacquire(LPDIRECTINPUTDEVICE8A iface)
 {
-    JoystickImpl *This = (JoystickImpl *)iface;
+    JoystickImpl *This = impl_from_IDirectInputDevice8A(iface);
     HRESULT res;
 
     TRACE("(%p)\n",This);
@@ -548,7 +557,7 @@ static void joy_polldev(LPDIRECTINPUTDEVICE8A iface)
 {
     struct pollfd plfd;
     struct js_event jse;
-    JoystickImpl *This = (JoystickImpl*) iface;
+    JoystickImpl *This = impl_from_IDirectInputDevice8A(iface);
 
     TRACE("(%p)\n", This);