msvcrt: Don't use tolowerW in _towlower_l.

Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcrt: Don't use tolowerW in _towlower_l.
7d2fafc0 · Piotr Caban · Alexandre Julliard · 59ee8787 · 7d2fafc0
Commit 7d2fafc0 authored Jul 16, 2020 by Piotr Caban Committed by Alexandre Julliard Jul 17, 2020
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wcs.c dlls/msvcrt/wcs.c +4 -1

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--- a/dlls/msvcrt/wcs.c
+++ b/dlls/msvcrt/wcs.c
@@ -92,6 +92,7 @@ MSVCRT_wchar_t* CDECL MSVCRT__wcsdup( const MSVCRT_wchar_t* str )
 int CDECL MSVCRT__towlower_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
 {
    MSVCRT_pthreadlocinfo locinfo;
+    MSVCRT_wchar_t ret;
    if(!locale)
        locinfo = get_locinfo();
@@ -104,7 +105,9 @@ int CDECL MSVCRT__towlower_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
        return c;
    }
-    return tolowerW(c);
+    if(!LCMapStringW(locinfo->lc_handle[MSVCRT_LC_CTYPE], LCMAP_LOWERCASE, &c, 1, &ret, 1))
+        return c;
+    return ret;
 }
 /*********************************************************************