Zero.hpp

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/* ImLib3D
 * Copyright (c) 2001, ULP-IPB Strasbourg.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program 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
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include<ImLib3D/Image3D.hpp>

#ifndef _Zero_hpp
#define _Zero_hpp

#include<ImLib3D/Complex.hpp>
#include<ImLib3D/Vect3D.hpp>
#include<ImLib3D/Vect2D.hpp>
#include<boost/type_traits.hpp>

template<typename T,bool isArithmetic=boost::is_arithmetic<T>::value >
struct SetZero
{
    static bool Set(T &v,bool fail=true){v=0;return true;}
};

template<typename T>
struct SetZero<T,false>
{
    static bool Set(T &v,bool fail=true)
    {
        if(fail)
        {
            ThrowError("SetZero failed for type %s. Please overload the templated struct SetZero function for this template type. Look at %s for an example",TypeName<T>(),__FILE__);
        }
        return false;
    }
};

template<> struct SetZero<complexf,false> { static bool Set(complexf &v,bool fail=true){v=0;return true;} };
template<> struct SetZero<complexd,false> { static bool Set(complexd &v,bool fail=true){v=0;return true;} };
template<> struct SetZero<Vect3Df ,false> { static bool Set(Vect3Df  &v,bool fail=true){v=0;return true;} };
template<> struct SetZero<Vect3Di ,false> { static bool Set(Vect3Di  &v,bool fail=true){v=0;return true;} };
template<> struct SetZero<Vect2Df ,false> { static bool Set(Vect3Df  &v,bool fail=true){v=0;return true;} };
template<> struct SetZero<Vect2Di ,false> { static bool Set(Vect3Di  &v,bool fail=true){v=0;return true;} };

template<typename T>
T Zero()
{
    T res;
    SetZero<T>::Set(res);
    return res;
}

#endif // _Zero_hpp

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