#include <bits/alltypes.h>
-#include <bits/wchar.h>
-
-#undef NULL
-#ifdef __cplusplus
-#define NULL 0
+#if L'\0'-1 > 0
+#define WCHAR_MAX (0xffffffffu+L'\0')
+#define WCHAR_MIN (0+L'\0')
#else
-#define NULL ((void*)0)
+#define WCHAR_MAX (0x7fffffff+L'\0')
+#define WCHAR_MIN (-1-0x7fffffff+L'\0')
#endif
+#define NULL 0L
+
#undef WEOF
#define WEOF (-1)