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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 _SCH_ARRAYHELPER_HXX
+#define _SCH_ARRAYHELPER_HXX
+
+#include <limits>
+
+namespace binfilter {
+
+/** Helper class for creating an array of type T and size nSize.
+ The create methods are protected against integer overflow in
+ operator new[].
+ */
+template< typename T >
+class ArrayHelper
+{
+public:
+ static T* create_short_size( short n );
+ static T* create_short_size( short m, short n );
+ static T* create_long_size( long n );
+ static T* create_long_size( long m, long n );
+};
+
+template< typename T >
+T* ArrayHelper< T >::create_short_size( short n )
+{
+ T* pRet = 0;
+ if ( n > 0 &&
+ static_cast< unsigned short >( n ) <= ( ::std::numeric_limits< size_t >::max() / sizeof( T ) ) )
+ {
+ pRet = new (std::nothrow) T[ n ];
+ }
+ return pRet;
+}
+
+template< typename T >
+T* ArrayHelper< T >::create_short_size( short m, short n )
+{
+ T* pRet = 0;
+ if ( m > 0 && n > 0 &&
+ static_cast< unsigned short >( m ) <= ( ( ::std::numeric_limits< size_t >::max() / n ) / sizeof( T ) ) )
+ {
+ pRet = new (std::nothrow) T[ static_cast< size_t >( m ) * n ];
+ }
+ return pRet;
+}
+
+template< typename T >
+T* ArrayHelper< T >::create_long_size( long n )
+{
+ T* pRet = 0;
+ if ( n > 0 &&
+ static_cast< unsigned long >( n ) <= ( ::std::numeric_limits< size_t >::max() / sizeof( T ) ) )
+ {
+ pRet = new (std::nothrow) T[ n ];
+ }
+ return pRet;
+}
+
+template< typename T >
+T* ArrayHelper< T >::create_long_size( long m, long n )
+{
+ T* pRet = 0;
+ if ( m > 0 && n > 0 &&
+ static_cast< unsigned long >( m ) <= ( ( ::std::numeric_limits< size_t >::max() / n ) / sizeof( T ) ) )
+ {
+ pRet = new (std::nothrow) T[ static_cast< size_t >( m ) * n ];
+ }
+ return pRet;
+}
+
+} //namespace binfilter
+#endif