[greatlrd] 27102: simplefly the math for calc out the guiddeviceidentify

Author: greatlrd
Date: Sun Jun 10 08:36:19 2007
New Revision: 27102

URL: http://svn.reactos.org/svn/reactos?rev=27102&view=rev
Log:
simplefly the math for calc out the guiddeviceidentify

Modified:
    trunk/reactos/dll/directx/ddraw/Ddraw/ddraw_main.c

Modified: trunk/reactos/dll/directx/ddraw/Ddraw/ddraw_main.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/directx/ddraw/Ddraw/dd…
==============================================================================
--- trunk/reactos/dll/directx/ddraw/Ddraw/ddraw_main.c (original)
+++ trunk/reactos/dll/directx/ddraw/Ddraw/ddraw_main.c Sun Jun 10 08:36:19 2007
@@ -545,18 +545,16 @@
                     /* Count out the guidDeviceIdentifier */
                     memcpy(&pDDDI->guidDeviceIdentifier,
&CLSID_DirectDraw,sizeof(GUID));
                    
-                    pDDDI->guidDeviceIdentifier.Data1 =
pDDDI->guidDeviceIdentifier.Data1 ^ pDDDI->dwVendorId;
+                    pDDDI->guidDeviceIdentifier.Data1 ^= pDDDI->dwVendorId;
 
                     lpdata = (long *)&pDDDI->guidDeviceIdentifier.Data2;
-                    *lpdata = *lpdata ^ pDDDI->dwDeviceId;
+                    *lpdata ^= pDDDI->dwDeviceId;
 
                     lpdata = (long *)&pDDDI->guidDeviceIdentifier.Data4;
-                    *lpdata = *lpdata ^ pDDDI->dwSubSysId;
-                    *lpdata = *lpdata ^ pDDDI->liDriverVersion.LowPart;
+                    *lpdata = (*lpdata ^ pDDDI->dwSubSysId) ^
pDDDI->liDriverVersion.LowPart;
 
                     lpdata = (long *)&pDDDI->guidDeviceIdentifier.Data4[4];
-                    *lpdata = *lpdata ^ pDDDI->dwRevision;
-                    *lpdata = *lpdata ^ pDDDI->liDriverVersion.HighPart;
+                    *lpdata = (*lpdata ^ pDDDI->dwRevision) ^
pDDDI->liDriverVersion.HighPart;
 
                     /* FIXME pDDDI->dwWHQLLevel
                      * we leave this with no informations, I do not known