1 files changed, 111 insertions, 0 deletions
diff --git a/src/corelib/text/qlocale_icu.cpp b/src/corelib/text/qlocale_icu.cpp
new file mode 100644
index 0000000000..afe0aae583
--- /dev/null
+++ b/src/corelib/text/qlocale_icu.cpp
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qglobal.h"
+#include "qdebug.h"
+#include "qlocale_p.h"
+#include "qmutex.h"
+
+#include "unicode/uloc.h"
+#include "unicode/ustring.h"
+
+QT_BEGIN_NAMESPACE
+
+typedef int32_t (*Ptr_u_strToCase)(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode);
+
+// caseFunc can either be u_strToUpper or u_strToLower
+static bool qt_u_strToCase(const QString &str, QString *out, const char *localeID, Ptr_u_strToCase caseFunc)
+{
+    Q_ASSERT(out);
+
+    int32_t size = str.size();
+    size += size >> 2; // add 25% for possible expansions
+    QString result(size, Qt::Uninitialized);
+
+    UErrorCode status = U_ZERO_ERROR;
+
+    size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
+            reinterpret_cast<const UChar *>(str.constData()), str.size(),
+            localeID, &status);
+
+    if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
+        return false;
+
+    if (size < result.size()) {
+        result.resize(size);
+    } else if (size > result.size()) {
+        // the resulting string is larger than our source string
+        result.resize(size);
+
+        status = U_ZERO_ERROR;
+        size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
+            reinterpret_cast<const UChar *>(str.constData()), str.size(),
+            localeID, &status);
+
+        if (U_FAILURE(status))
+            return false;
+
+        // if the sizes don't match now, we give up.
+        if (size != result.size())
+            return false;
+    }
+
+    *out = result;
+    return true;
+}
+
+QString QIcu::toUpper(const QByteArray &localeID, const QString &str, bool *ok)
+{
+    QString out;
+    bool err = qt_u_strToCase(str, &out, localeID, u_strToUpper);
+    if (ok)
+        *ok = err;
+    return out;
+}
+
+QString QIcu::toLower(const QByteArray &localeID, const QString &str, bool *ok)
+{
+    QString out;
+    bool err = qt_u_strToCase(str, &out, localeID, u_strToLower);
+    if (ok)
+        *ok = err;
+    return out;
+}
+
+QT_END_NAMESPACE