convert BOX_LINE and BOXINFO_LINE to enum class

since their usage is intertwined.

Also introduce new o3tl utilities enumrange and enumarray to make
working with scoped enums a little simpler.

Change-Id: I2e1cc65dd7c638e59f17d96dfae504747cad6533

1 files changed, 107 insertions, 0 deletions

diff --git a/include/o3tl/enumarray.hxx b/include/o3tl/enumarray.hxx
new file mode 100644
index 000000000000..89f7e16a6ce1
--- /dev/null
+++ b/include/o3tl/enumarray.hxx
@@ -0,0 +1,107 @@
+/* -*- 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_O3TL_ENUMARRAY_HXX
+#define INCLUDED_O3TL_ENUMARRAY_HXX
+
+#include <sal/config.h>
+#include <initializer_list>
+#include <iterator>
+
+namespace o3tl {
+
+template<typename EA>
+class enumarray_iterator;
+
+///
+/// This is a container convenience class for arrays indexed by enum values.
+///
+/// This assumes that the 'enum class' definition
+///  - starts at zero
+///  - has no holes in it's sequence of values
+///  - defines a value called LAST which refers to the greatest constant.
+///
+/// \param E the 'enum class' type.
+/// \param V the value type to be stored in the array
+template<typename E, typename V>
+class enumarray SAL_FINAL
+{
+public:
+    typedef enumarray<E, V> self_type;
+    typedef enumarray_iterator<self_type> iterator;
+
+    typedef V             value_type;
+    typedef E             key_type;
+    typedef size_t        size_type;
+
+    static const size_type max_index = static_cast<size_type>(E::LAST);
+
+    /** Create an enumarray with the given elements.
+
+        @param init an initializer_list
+    */
+    enumarray(std::initializer_list<V> init)
+    { std::copy(init.begin(), init.end(), std::begin(values)); }
+
+    enumarray() {}
+
+    const V operator[](E index) const
+    {
+        assert(index>=static_cast<E>(0) && index<=E::LAST);
+        return values[static_cast<size_type>(index)];
+    }
+
+    V& operator[](E index)
+    {
+        assert(index>=static_cast<E>(0) && index<=E::LAST);
+        return values[static_cast<size_type>(index)];
+    }
+
+    void fill(V val)
+    { for (size_type i=0; i<=max_index; ++i) values[i] = val; }
+
+    size_type size() const { return max_index + 1; }
+    iterator  begin()      { return iterator(this, 0); }
+    iterator  end()        { return iterator(this, size()); }
+private:
+    V values[max_index + 1];
+};
+
+
+template<typename EA>
+class enumarray_iterator {
+    EA         &m_buf;
+    size_t      m_pos;
+public:
+    typedef enumarray_iterator<EA>  self_type;
+    typedef typename EA::value_type value_type;
+    typedef typename EA::key_type   key_type;
+
+    enumarray_iterator(EA& b, size_t start_pos)
+         : m_buf(b), m_pos(start_pos) {}
+    value_type &operator*()  { return m_buf[static_cast<key_type>(m_pos)]; }
+    value_type *operator->() { return &(operator*()); }
+    self_type  &operator++() { ++m_pos; return *this; }
+};
+
+}; // namespace o3tl
+
+#endif /* INCLUDED_O3TL_ENUMARRAY_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */