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/************************************************************************/
/*                                                                      */
/*         Copyright 2002-2003 by Ullrich Koethe, Hans Meine            */
/*                                                                      */
/*    This file is part of the VIGRA computer vision library.           */
/*    The VIGRA Website is                                              */
/*        http://hci.iwr.uni-heidelberg.de/vigra/                       */
/*    Please direct questions, bug reports, and contributions to        */
/*        ullrich.koethe@iwr.uni-heidelberg.de    or                    */
/*        vigra@informatik.uni-hamburg.de                               */
/*                                                                      */
/*    Permission is hereby granted, free of charge, to any person       */
/*    obtaining a copy of this software and associated documentation    */
/*    files (the "Software"), to deal in the Software without           */
/*    restriction, including without limitation the rights to use,      */
/*    copy, modify, merge, publish, distribute, sublicense, and/or      */
/*    sell copies of the Software, and to permit persons to whom the    */
/*    Software is furnished to do so, subject to the following          */
/*    conditions:                                                       */
/*                                                                      */
/*    The above copyright notice and this permission notice shall be    */
/*    included in all copies or substantial portions of the             */
/*    Software.                                                         */
/*                                                                      */
/*    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND    */
/*    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES   */
/*    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND          */
/*    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT       */
/*    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,      */
/*    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING      */
/*    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR     */
/*    OTHER DEALINGS IN THE SOFTWARE.                                   */                
/*                                                                      */
/************************************************************************/

#ifndef VIGRA_MEMORY_HXX
#define VIGRA_MEMORY_HXX

#include "metaprogramming.hxx"

namespace vigra { 

enum SkipInitializationTag { SkipInitialization};

template<class T>
struct CanSkipInitialization
{
    typedef typename TypeTraits<T>::isBuiltinType type;
    static const bool value = type::asBool;
};

namespace detail {

// differs from std::uninitialized_copy by explicit type conversion
template <class Src, class Dest>
Dest uninitializedCopy(Src s, Src end, Dest d)
{
    typedef typename std::iterator_traits<Dest>::value_type T;
    for(; s != end; ++s, ++d)
        new(d) T(static_cast<T const &>(*s));
    return d;
}

template <class T>
inline void destroy_n(T * /* p */, std::ptrdiff_t /* n */, VigraTrueType /* isPOD */)
{
}

template <class T>
inline void destroy_n(T * p, std::ptrdiff_t n, VigraFalseType /* isPOD */)
{
    T * end = p + n;
    for(; p != end; ++p)
        p->~T();
}

template <class T>
inline void destroy_n(T * p, std::ptrdiff_t n)
{
    destroy_n(p, n, typename TypeTraits<T>::isPOD());
}

/********************************************************************/

// g++ 2.95 has std::destroy() in the STL
#if !defined(__GNUC__) ||  __GNUC__ >= 3

template <class T>
inline void destroy(T * p, VigraTrueType /* isPOD */)
{
}

template <class T>
inline void destroy(T * p, VigraFalseType /* isPOD */)
{
    p->~T();
}

template <class T>
inline void destroy(T * p)
{
    destroy(p, typename TypeTraits<T>::isPOD());
}

#else

} } // namespace vigra::detail

#include <memory>

namespace vigra { namespace detail {

using std::destroy;

#endif

} } // namespace vigra::detail

#endif // VIGRA_MEMORY_HXX