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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: metafunctions.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: thb $ $Date: 2006-05-31 10:12:12 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef INCLUDED_BASEBMP_METAFUNCTIONS_HXX
#define INCLUDED_BASEBMP_METAFUNCTIONS_HXX
namespace basebmp
{
// TODO(Q3): move to generic place (o3tl?)
/// template meta function: add const qualifier, if given 2nd type has it
template<typename A, typename B> struct clone_const
{
typedef B type;
};
template<typename A, typename B> struct clone_const<const A,B>
{
typedef const B type;
};
/// template meta function: remove const qualifier from plain type
template <typename T> struct remove_const
{
typedef T type;
};
template <typename T> struct remove_const<const T>
{
typedef T type;
};
/// returns true, if given number is strictly less than 0
template< typename T > inline bool is_negative( T x )
{
return x < 0;
}
/// Overload for ints (branch-free)
inline bool is_negative( int x )
{
// force logic shift (result for signed shift right is undefined)
return static_cast<unsigned int>(x) >> (sizeof(int)*8-1);
}
} // namespace basebmp
#endif /* INCLUDED_BASEBMP_METAFUNCTIONS_HXX */
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