win32u: Use user message packing for WM_COMPAREITEM.

dlls/user32/winproc.c

@@ -844,22 +844,8 @@ BOOL unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lparam,
     case WM_DRAWITEM:
     case WM_MEASUREITEM:
     case WM_DELETEITEM:
-        break;
     case WM_COMPAREITEM:
-    {
-        COMPAREITEMSTRUCT cis;
-        if (size < sizeof(ps->cis)) return FALSE;
-        cis.CtlType    = ps->cis.CtlType;
-        cis.CtlID      = ps->cis.CtlID;
-        cis.hwndItem   = unpack_handle( ps->cis.hwndItem );
-        cis.itemID1    = ps->cis.itemID1;
-        cis.itemData1  = (ULONG_PTR)unpack_ptr( ps->cis.itemData1 );
-        cis.itemID2    = ps->cis.itemID2;
-        cis.itemData2  = (ULONG_PTR)unpack_ptr( ps->cis.itemData2 );
-        cis.dwLocaleId = ps->cis.dwLocaleId;
-        memcpy( *buffer, &cis, sizeof(cis) );
         break;
-    }
     case WM_WINDOWPOSCHANGING:
     case WM_WINDOWPOSCHANGED:
     {
@@ -1150,6 +1136,7 @@ BOOL WINAPI User32CallWindowProc( struct win_proc_params *params, ULONG size )
         case WM_GETMINMAXINFO:
         case WM_MEASUREITEM:
         case WM_DELETEITEM:
+        case WM_COMPAREITEM:
         {
             LRESULT *result_ptr = (LRESULT *)buffer - 1;
             *result_ptr = result;

dlls/win32u/message.c

@@ -474,6 +474,21 @@ static BOOL unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lpa
         memcpy( *buffer, &dls, sizeof(dls) );
         break;
     }
+    case WM_COMPAREITEM:
+    {
+        COMPAREITEMSTRUCT cis;
+        if (size < sizeof(ps->cis)) return FALSE;
+        cis.CtlType    = ps->cis.CtlType;
+        cis.CtlID      = ps->cis.CtlID;
+        cis.hwndItem   = wine_server_ptr_handle( ps->cis.hwndItem );
+        cis.itemID1    = ps->cis.itemID1;
+        cis.itemData1  = (ULONG_PTR)unpack_ptr( ps->cis.itemData1 );
+        cis.itemID2    = ps->cis.itemID2;
+        cis.itemData2  = (ULONG_PTR)unpack_ptr( ps->cis.itemData2 );
+        cis.dwLocaleId = ps->cis.dwLocaleId;
+        memcpy( *buffer, &cis, sizeof(cis) );
+        break;
+    }
     case WM_WINE_SETWINDOWPOS:
     {
         WINDOWPOS wp;
@@ -1270,6 +1285,9 @@ size_t user_message_size( UINT message, WPARAM wparam, LPARAM lparam, BOOL other
     case WM_DELETEITEM:
         size = sizeof(DELETEITEMSTRUCT);
         break;
+    case WM_COMPAREITEM:
+        size = sizeof(COMPAREITEMSTRUCT);
+        break;
     }
 
     return size;

dlls/win32u/tests/win32u.c

@@ -1625,6 +1625,7 @@ static void test_wndproc_hook(void)
     static const MEASUREITEMSTRUCT mis_in = { .itemID = 1 };
     static const MEASUREITEMSTRUCT mis_out = { .itemID = 2, .CtlType = 3, .CtlID = 4, .itemData = 5 };
     static const DELETEITEMSTRUCT dis_in = { .itemID = 1 };
+    static const COMPAREITEMSTRUCT cis_in = { .itemID1 = 1 };
 
     static const struct lparam_hook_test lparam_hook_tests[] =
     {
@@ -1724,6 +1725,11 @@ static void test_wndproc_hook(void)
             .lparam_size = sizeof(dis_in), .lparam = &dis_in, .poison_lparam = TRUE,
             .check_size = sizeof(dis_in),
         },
+        {
+            "WM_COMPAREITEM", WM_COMPAREITEM, .wparam = 10,
+            .lparam_size = sizeof(cis_in), .lparam = &cis_in, .poison_lparam = TRUE,
+            .check_size = sizeof(cis_in),
+        },
         /* messages that don't change lparam */
         { "WM_USER", WM_USER },
         { "WM_NOTIFY", WM_NOTIFY },

dlls/wow64win/user.c

@@ -698,6 +698,23 @@ static size_t packed_message_64to32( UINT message, WPARAM wparam,
             memcpy( params32, &dis32, sizeof(dis32) );
             return sizeof(dis32);
         }
+
+    case WM_COMPAREITEM:
+        {
+            COMPAREITEMSTRUCT32 cis32;
+            const COMPAREITEMSTRUCT *cis64 = params64;
+
+            cis32.CtlType    = cis64->CtlType;
+            cis32.CtlID      = cis64->CtlID;
+            cis32.hwndItem   = HandleToLong( cis64->hwndItem );
+            cis32.itemID1    = cis64->itemID1;
+            cis32.itemData1  = cis64->itemData1;
+            cis32.itemID2    = cis64->itemID2;
+            cis32.itemData2  = cis64->itemData2;
+            cis32.dwLocaleId = cis64->dwLocaleId;
+            memcpy( params32, &cis32, sizeof(cis32) );
+            return sizeof(cis32);
+        }
     }
 
     memmove( params32, params64, size );