space_key.hpp

/*
 * space_key.hpp
 *
 *  Created on: Mar 6, 2015
 *      Author: Pietro Incardona
 */

#ifndef SPACE_KEY_HPP_
#define SPACE_KEY_HPP_


template<unsigned int dim, typename T>
class space_key_dx
{
public:

    space_key_dx()
    {}

    space_key_dx(T (& k)[dim])
    {
        for (int i = 0 ; i < dim ; i++)
            this->k[i] = k[i];
    }

    space_key_dx(const T (& k)[dim])
    {
        for (int i = 0 ; i < dim ; i++)
            this->k[i] = k[i];
    }

    space_key_dx(const T v,const T...t)
    {
        k[dim-1] = v;
        invert_assign(t...);
    }

    inline void zero()
    {
        for (int i = 0 ; i < dim ; i++)
        {
            k[i] = 0;
        }
    }

    inline void invalid()
    {
        for (int i = 0 ; i < dim ; i++)
        {
            k[i] = -1;
        }
    }

    /* \brief Check if two key are the same
     *
     * \param key_t key to check
     *
     * \return true if the two key are identical
     *
     */

    template<unsigned int dim_t> bool operator==(space_key_dx<dim_t,T> & key_t)
    {
        if (dim != dim_t)
        {
            return false;
        }

        // Check the two key index by index

        for (int i = 0 ; i < dim ; i++)
        {
            if (k[i] != key_t.k[i])
            {
                return false;
            }
        }

        // identical key
        return true;
    }

    template<typename a, typename ...T>void set(a v, T...t)
    {
        k[dim-1] = v;
        invert_assign(t...);
    }

    mem_id value(size_t i) const
    {
        return k[i];
    }

    mem_id get(size_t i) const
    {
        return k[i];
    }

    void set_d(size_t i, mem_id id)
    {
#ifdef DEBUG

        if (i >= dim)
            std::cerr << "grid_key_dx error: " << __FILE__ << " " << __LINE__ << " try to access dimension " << i << " on a grid_key_dx of size " << dim << "\n";

#endif
        k[i] = id;
    }

    mem_id k[dim];

private:

    template<typename a, typename ...T>void invert_assign(a v,T...t)
    {
        k[sizeof...(T)] = v;
        invert_assign(t...);
    }

    template<typename a, typename ...T>void invert_assign(a v)
    {
        k[0] = v;
    }

    void invert_assign()
    {
    }

};


#endif /* SPACE_KEY_HPP_ */