1 files changed, 84 insertions, 0 deletions
diff --git a/include/systools/win32/oleauto.hxx b/include/systools/win32/oleauto.hxx
new file mode 100644
index 000000000..c01ac1225
--- /dev/null
+++ b/include/systools/win32/oleauto.hxx
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cassert>
+#include <string_view>
+#include <utility>
+
+#include <prewin.h>
+#include <oleauto.h>
+#include <postwin.h>
+
+#include <o3tl/char16_t2wchar_t.hxx>
+
+namespace sal::systools
+{
+// BSTR safe wrapper
+class BStr
+{
+public:
+    BStr() = default;
+    BStr(std::u16string_view sv)
+        : m_Str(::SysAllocStringLen(o3tl::toW(sv.data()), sv.length()))
+    {
+    }
+    BStr(const BStr& src)
+        : BStr(std::u16string_view(src))
+    {
+    }
+    BStr(BStr&& src)
+        : m_Str(std::exchange(src.m_Str, nullptr))
+    {
+    }
+    ~BStr() { ::SysFreeString(m_Str); }
+    BStr& operator=(std::u16string_view sv)
+    {
+        ::SysFreeString(
+            std::exchange(m_Str, ::SysAllocStringLen(o3tl::toW(sv.data()), sv.length())));
+        return *this;
+    }
+    BStr& operator=(const BStr& src)
+    {
+        if (&src != this)
+            operator=(std::u16string_view(src));
+        return *this;
+    }
+    BStr& operator=(BStr&& src)
+    {
+        ::SysFreeString(std::exchange(m_Str, std::exchange(src.m_Str, nullptr)));
+        return *this;
+    }
+    operator std::u16string_view() const { return { o3tl::toU(m_Str), length() }; }
+    operator BSTR() const { return m_Str; }
+    BSTR* operator&()
+    {
+        assert(!m_Str);
+        return &m_Str;
+    }
+    UINT length() const { return ::SysStringLen(m_Str); }
+
+private:
+    BSTR m_Str = nullptr;
+};
+
+} // sal::systools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */