msvcrt: Add _ungetwch implementation.

dlls/msvcr100/msvcr100.spec

@@ -1412,8 +1412,8 @@
 @ cdecl _ungetch(long)
 @ cdecl _ungetch_nolock(long)
 @ cdecl _ungetwc_nolock(long ptr) MSVCRT__ungetwc_nolock
-@ stub _ungetwch
-@ stub _ungetwch_nolock
+@ cdecl _ungetwch(long)
+@ cdecl _ungetwch_nolock(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr110/msvcr110.spec

@@ -1770,8 +1770,8 @@
 @ cdecl _ungetch(long)
 @ cdecl _ungetch_nolock(long)
 @ cdecl _ungetwc_nolock(long ptr) MSVCRT__ungetwc_nolock
-@ stub _ungetwch
-@ stub _ungetwch_nolock
+@ cdecl _ungetwch(long)
+@ cdecl _ungetwch_nolock(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr120/msvcr120.spec

@@ -1784,8 +1784,8 @@
 @ cdecl _ungetch(long)
 @ cdecl _ungetch_nolock(long)
 @ cdecl _ungetwc_nolock(long ptr) MSVCRT__ungetwc_nolock
-@ stub _ungetwch
-@ stub _ungetwch_nolock
+@ cdecl _ungetwch(long)
+@ cdecl _ungetwch_nolock(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr70/msvcr70.spec

@@ -578,7 +578,7 @@
 @ cdecl _ultow(long ptr long) ntdll._ultow
 @ cdecl _umask(long) MSVCRT__umask
 @ cdecl _ungetch(long)
-@ stub _ungetwch
+@ cdecl _ungetwch(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr71/msvcr71.spec

@@ -574,7 +574,7 @@
 @ cdecl _ultow(long ptr long) ntdll._ultow
 @ cdecl _umask(long) MSVCRT__umask
 @ cdecl _ungetch(long)
-@ stub _ungetwch
+@ cdecl _ungetwch(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr80/msvcr80.spec

@@ -1092,8 +1092,8 @@
 @ cdecl _ungetch(long)
 @ cdecl _ungetch_nolock(long)
 @ cdecl _ungetwc_nolock(long ptr) MSVCRT__ungetwc_nolock
-@ stub _ungetwch
-@ stub _ungetwch_nolock
+@ cdecl _ungetwch(long)
+@ cdecl _ungetwch_nolock(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcr90/msvcr90.spec

@@ -1067,8 +1067,8 @@
 @ cdecl _ungetch(long)
 @ cdecl _ungetch_nolock(long)
 @ cdecl _ungetwc_nolock(long ptr) MSVCRT__ungetwc_nolock
-@ stub _ungetwch
-@ stub _ungetwch_nolock
+@ cdecl _ungetwch(long)
+@ cdecl _ungetwch_nolock(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)

dlls/msvcrt/console.c

@@ -439,6 +439,28 @@ int CDECL _ungetch(int c)
 }
 
 /*********************************************************************
+ *              _ungetwch_nolock (MSVCR80.@)
+ */
+MSVCRT_wchar_t CDECL _ungetwch_nolock(MSVCRT_wchar_t c)
+{
+    MSVCRT_wchar_t retval = MSVCRT_WEOF;
+    if (c != MSVCRT_WEOF && __MSVCRT_console_buffer_w == MSVCRT_WEOF)
+        retval = __MSVCRT_console_buffer_w = c;
+    return retval;
+}
+
+/*********************************************************************
+ *              _ungetwch (MSVCRT.@)
+ */
+MSVCRT_wchar_t CDECL _ungetwch(MSVCRT_wchar_t c)
+{
+    LOCK_CONSOLE;
+    c = _ungetwch_nolock(c);
+    UNLOCK_CONSOLE;
+    return c;
+}
+
+/*********************************************************************
  *		_kbhit (MSVCRT.@)
  */
 int CDECL _kbhit(void)

dlls/msvcrt/msvcrt.spec

@@ -1025,7 +1025,7 @@
 @ cdecl _umask(long) MSVCRT__umask
 # stub _umask_s(long ptr)
 @ cdecl _ungetch(long)
-# stub _ungetwch(long)
+@ cdecl _ungetwch(long)
 @ cdecl _unlink(str) MSVCRT__unlink
 @ cdecl _unloaddll(long)
 @ cdecl _unlock(long)