msvcrt: Don't use toupperW in _towupper_l.

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

msvcrt: Don't use toupperW in _towupper_l.
55c1a162 · Piotr Caban · Alexandre Julliard · bc47bff4 · 55c1a162
Commit 55c1a162 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
@@ -2604,6 +2604,7 @@ MSVCRT_size_t CDECL MSVCRT_wcsnlen(const MSVCRT_wchar_t *s, MSVCRT_size_t maxlen
 int CDECL MSVCRT__towupper_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
 {
    MSVCRT_pthreadlocinfo locinfo;
+    MSVCRT_wchar_t ret;

    if(!locale)
        locinfo = get_locinfo();
@@ -2616,7 +2617,9 @@ int CDECL MSVCRT__towupper_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
        return c;
    }

-    return toupperW(c);
+    if(!LCMapStringW(locinfo->lc_handle[MSVCRT_LC_CTYPE], LCMAP_UPPERCASE, &c, 1, &ret, 1))
+        return c;
+    return ret;
 }

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