[reactos] 01/01: [GDI32] GdiConvertToDevmodeW: Import WINE commit 32393796bb534e9cf11dd988dce88722c67f7906 ("gdi32: GdiConvertToDevmodeW should not refer to unintialized name bytes.")

[Colin Finck]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=5d8c39753e82e8e7f8db9…

commit 5d8c39753e82e8e7f8db90a427b230ed248f0158
Author:     Colin Finck <colin(a)reactos.org>
AuthorDate: Mon Feb 24 19:17:56 2020 +0100
Commit:     Colin Finck <colin(a)reactos.org>
CommitDate: Mon Feb 24 19:17:56 2020 +0100

    [GDI32] GdiConvertToDevmodeW: Import WINE commit
32393796bb534e9cf11dd988dce88722c67f7906 ("gdi32: GdiConvertToDevmodeW should not
refer to unintialized name bytes.")
    
    This makes our GdiConvertToDevmodeW equivalent to the WINE counterpart again.
---
 win32ss/gdi/gdi32/misc/misc.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/win32ss/gdi/gdi32/misc/misc.c b/win32ss/gdi/gdi32/misc/misc.c
index b31db63b9fa..04be375853f 100644
--- a/win32ss/gdi/gdi32/misc/misc.c
+++ b/win32ss/gdi/gdi32/misc/misc.c
@@ -962,6 +962,7 @@ bMakePathNameW(LPWSTR lpBuffer,LPCWSTR lpFileName,LPWSTR
*lpFilePart,DWORD unkno
 
 /*
  * @implemented
+ * Synchronized with WINE dlls/gdi32/driver.c
  */
 DEVMODEW *
 WINAPI
@@ -986,15 +987,19 @@ GdiConvertToDevmodeW(const DEVMODEA *dmA)
     dmW = HeapAlloc(GetProcessHeap(), 0, dmW_size + dmA->dmDriverExtra);
     if (!dmW) return NULL;
 
-    MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmDeviceName, CCHDEVICENAME,
-                        dmW->dmDeviceName, CCHDEVICENAME);
+    MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmDeviceName, -1,
+                                   dmW->dmDeviceName, CCHDEVICENAME);
     /* copy slightly more, to avoid long computations */
     memcpy(&dmW->dmSpecVersion, &dmA->dmSpecVersion, dmA_size -
CCHDEVICENAME);
 
     if (dmA_size >= FIELD_OFFSET(DEVMODEA, dmFormName) + CCHFORMNAME)
     {
-        MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmFormName, CCHFORMNAME,
-                            dmW->dmFormName, CCHFORMNAME);
+        if (dmA->dmFields & DM_FORMNAME)
+            MultiByteToWideChar(CP_ACP, 0, (const char*) dmA->dmFormName, -1,
+                                       dmW->dmFormName, CCHFORMNAME);
+        else
+            dmW->dmFormName[0] = 0;
+
         if (dmA_size > FIELD_OFFSET(DEVMODEA, dmLogPixels))
             memcpy(&dmW->dmLogPixels, &dmA->dmLogPixels, dmA_size -
FIELD_OFFSET(DEVMODEA, dmLogPixels));
     }