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diff --git a/shell/source/tools/lngconvex/cmdline.hxx b/shell/source/tools/lngconvex/cmdline.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 .
+ */
+
+#ifndef INCLUDED_SHELL_SOURCE_TOOLS_LNGCONVEX_CMDLINE_HXX
+#define INCLUDED_SHELL_SOURCE_TOOLS_LNGCONVEX_CMDLINE_HXX
+
+#include <string>
+
+#include <sal/config.h>
+
+#include <sal/types.h>
+
+
+/** Simple command line abstraction
+*/
+
+class CommandLine
+{
+public:
+
+    // Creation
+
+
+    CommandLine(size_t argc, char* argv[]);
+
+
+    // Query
+
+
+    /** Returns an argument by name. If there are
+        duplicate argument names in the command line,
+        the first one wins.
+        Argument name and the argument value must be separated
+        by spaces. If the argument value starts with an
+        argument prefix use quotes else the return value is
+        an empty string because the value will be interpreted
+        as the next argument name.
+        If an argument value contains spaces use quotes.
+
+        @precond    GetArgumentNames() -> has element ArgumentName
+
+        @throws std::invalid_argument exception
+        if the specified argument could not be
+        found
+    */
+    std::string get_arg(const std::string& ArgumentName) const;
+
+
+private:
+
+    /** Returns whether a given argument is an argument name
+    */
+    static bool is_arg_name(const std::string& Argument);
+
+private:
+    size_t      m_argc;
+    char**      m_argv;
+
+// prevent copy and assignment
+private:
+    CommandLine(const CommandLine&) = delete;
+    CommandLine& operator=(const CommandLine&) = delete;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */