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diff --git a/include/cosv/comfunc.hxx b/include/cosv/comfunc.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 CSV_COMFUNC_HXX
+#define CSV_COMFUNC_HXX
+
+#include <stdlib.h>
+
+
+
+
+namespace csv
+{
+    class String;
+
+
+// min, max and range functions
+template <class E>
+inline E            max(E in1, E in2);
+template <class E>
+inline E            min(E in1, E in2);
+template <class E>
+inline bool         in_range(E low, E val, E high);    // return low <= val < high;
+
+
+// string functions
+inline const char * valid_str(const char * str);
+inline bool         no_str(const char * str);       // return !str || !strlen(str)
+
+
+// IMPLEMENTATION
+template <class E>
+inline E
+max(E in1, E in2)   { return in1 < in2 ? in2 : in1; }
+template <class E>
+inline E
+min(E in1, E in2)   { return in1 < in2 ? in1 : in2; }
+template <class E>
+inline bool
+in_range(E low, E val, E high) { return low <= val AND val < high; }
+
+inline const char *
+valid_str(const char * str) { return str != 0 ? str : ""; }
+inline bool
+no_str(const char * str) { return str != 0 ? *str == '\0' : true; }
+
+}   // namespace csv
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */