QQmlPropertyCache: don't depend on locale for toupper

The C toupper/tolower functions are locale-dependent. Given the right
locale (Türkiye, e.g.), toupper(i) is either

- İ (LATIN CAPITAL LETTER I WITH DOT ABOVE; if representable) or
- i (unchanged; if it isn't)

Both results are wrong for the present use-case. Use the new
QtMiscUtils::toAsciiUpper() function instead.

Amends d481f2ff518df1e44103d1850e7d52bd69260c34.

Task-number: QTBUG-109235
Change-Id: Ib66593fc7eff3edc0cc16291ca3eae8bdf0dd8ed
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 179200d2a3fa0df28fbf3790f8ff1ee47d0926c0)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/qml/qml/qqmlpropertycache.cpp b/src/qml/qml/qqmlpropertycache.cpp
index 6c725eb2dc..231c2f9ae8 100644
--- a/src/qml/qml/qqmlpropertycache.cpp
+++ b/src/qml/qml/qqmlpropertycache.cpp
@@ -51,8 +51,8 @@
 
 #include <QtCore/qdebug.h>
 #include <QtCore/QCryptographicHash>
+#include <QtCore/private/qtools_p.h>
 
-#include <ctype.h> // for toupper
 #include <limits.h>
 #include <algorithm>
 
@@ -527,7 +527,7 @@ void QQmlPropertyCache::append(const QMetaObject *metaObject,
                 QVarLengthArray<char, 128> str(length+3);
                 str[0] = 'o';
                 str[1] = 'n';
-                str[2] = toupper(rawName[0]);
+                str[2] = QtMiscUtils::toAsciiUpper(rawName[0]);
                 if (length > 1)
                     memcpy(&str[3], &rawName[1], length - 1);
                 str[length + 2] = '\0';