02/02: [WIN32K] Work around GCC builds inventing dead keys. CORE-14948

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=3d3bd4e77e71e96699589…

commit 3d3bd4e77e71e96699589d642d8c6e903df6219b
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Sun Sep 23 19:28:09 2018 +0200
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Sun Sep 23 20:03:14 2018 +0200

    [WIN32K] Work around GCC builds inventing dead keys.
    CORE-14948
---
 win32ss/user/ntuser/keyboard.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/win32ss/user/ntuser/keyboard.c b/win32ss/user/ntuser/keyboard.c
index 6167f9d6ff..f72e275cf2 100644
--- a/win32ss/user/ntuser/keyboard.c
+++ b/win32ss/user/ntuser/keyboard.c
@@ -467,17 +467,30 @@ IntToUnicodeEx(UINT wVirtKey,
         WCHAR wchFirst, wchSecond;
         TRACE("Previous dead char: %lc (%x)\n", wchDead, wchDead);
 
-        for (i = 0; pKbdTbl->pDeadKey[i].dwBoth; i++)
+        if (pKbdTbl->pDeadKey)
         {
-            wchFirst = pKbdTbl->pDeadKey[i].dwBoth >> 16;
-            wchSecond = pKbdTbl->pDeadKey[i].dwBoth & 0xFFFF;
-            if (wchFirst == wchDead && wchSecond == wchTranslatedChar)
+            for (i = 0; pKbdTbl->pDeadKey[i].dwBoth; i++)
             {
-                wchTranslatedChar = pKbdTbl->pDeadKey[i].wchComposed;
+                wchFirst = pKbdTbl->pDeadKey[i].dwBoth >> 16;
+                wchSecond = pKbdTbl->pDeadKey[i].dwBoth & 0xFFFF;
+                if (wchFirst == wchDead && wchSecond == wchTranslatedChar)
+                {
+                    wchTranslatedChar = pKbdTbl->pDeadKey[i].wchComposed;
+                    wchDead = 0;
+                    bDead = FALSE;
+                    break;
+                }
+            }
+        }
+        else
+        {
+#if defined(__GNUC__)
+            if (wchDead == 0x8000)
+            {
+                ERR("GCC is inventing bits, ignoring fake dead key\n");
                 wchDead = 0;
-                bDead = FALSE;
-                break;
             }
+#endif
         }
 
         TRACE("Final char: %lc (%x)\n", wchTranslatedChar, wchTranslatedChar);