Adding missing files

src/Grid/iterators/stencil_type.hpp

+/*
+ * stencil_type.hpp
+ *
+ *  Created on: Jun 25, 2017
+ *      Author: i-bird
+ */
+
+#ifndef OPENFPM_DATA_SRC_GRID_ITERATORS_STENCIL_TYPE_HPP_
+#define OPENFPM_DATA_SRC_GRID_ITERATORS_STENCIL_TYPE_HPP_
+
+/*! \brief Structure for stencil iterator
+ *
+ *
+ * \tparam Np number of stencil points
+ *
+ */
+template<unsigned int dim, unsigned int Np>
+struct stencil_offset_compute
+{
+	//! Number of stencil points
+	static const unsigned int nsp = Np;
+
+	//! set of offsets for the stencil
+	long int stencil_offset[Np];
+
+	//! Stencil points
+	grid_key_dx<dim> stencil_pnt[Np];
+
+
+	/*! \brief Set the stencil points
+	 *
+	 * \param stencil points
+	 *
+	 */
+	template<unsigned int dim2> void set_stencil(const grid_key_dx<dim2> (& stencil_pnt)[Np])
+	{
+		for (size_t i = 0 ; i < Np ; i++)
+		{this->stencil_pnt[i] = stencil_pnt[i];}
+	}
+
+	/*! \brief Get the calculated stencil offset
+	 *
+	 * \tparam id stencil point
+	 *
+	 * \return the point
+	 *
+	 */
+	template<unsigned int id> size_t getStencil() const
+	{
+		return stencil_offset[id];
+	}
+
+	/*! \brief Calculate the offsets of the stencil points
+	 *
+	 * \param g object storing the grid information
+	 * \param start_p starting point where we calculate the stencil offsets
+	 *
+	 *
+	 */
+	template<unsigned int dim2, typename ginfo>
+	inline void calc_offsets(const ginfo & g,
+							 const grid_key_dx<dim2> & start_p)
+	{
+		for (size_t i = 0 ; i < Np ; i++)
+		{
+			grid_key_dx<dim2> zero;
+			zero = start_p + stencil_pnt[i];
+
+			stencil_offset[i] = g.LinId(zero);
+		}
+	}
+
+	/*! \brief Calculate the offsets of the stencil points
+	 *
+	 * \tparam dim dimensionality
+	 * \tparam ginfo grid information object
+	 *
+	 * \param g information of the grid
+	 * \param start_p starting point
+	 * \param stencil_pnt stencil points in the grid
+	 *
+	 *
+	 */
+	template<unsigned int dim2,typename ginfo>
+	inline void calc_offsets(const ginfo & g,
+							 const grid_key_dx<dim2> & start_p,
+			                 const grid_key_dx<dim2> (& stencil_pnt)[Np])
+	{
+		for (size_t i = 0 ; i < Np ; i++)
+		{
+			grid_key_dx<dim2> offset_point;
+			this->stencil_pnt[i] = stencil_pnt[i];
+			offset_point = start_p + stencil_pnt[i];
+			stencil_offset[i] = g.LinId(offset_point);
+		}
+	}
+
+	/*! \brief Increment the offsets by one
+	 *
+	 *
+	 */
+	inline void increment()
+	{
+		// update the offsets
+		for (size_t i = 0 ; i < Np ; i++)
+			stencil_offset[i] += 1;
+	}
+
+	/*! \brief Adjust the offset
+	 *
+	 * \param i component
+	 * \param idr component
+	 * \param grid_base obbect containing the grid informations
+	 *
+	 */
+	template<typename ginfo> inline void adjust_offset(size_t i, size_t idr, const ginfo & grid_base)
+	{
+		size_t str_dw = (i == 0)?1:grid_base.size_s(i-1);
+
+		// update the offsets
+		for (size_t k = 0 ; k < Np ; k++)
+		{stencil_offset[k] += -str_dw*idr + grid_base.size_s(i);}
+	}
+};
+
+/*! \brief no stencil
+ *
+ */
+struct no_stencil
+{
+	//! dimensions of space, should be zero but is one 1
+	//! otherwise can produce zero length arrays
+	static const unsigned int nsp = 1;
+
+	/*! \brief get stencil point
+	 *
+	 * do nothing
+	 *
+	 * \return 0
+	 *
+	 */
+	template<unsigned int id> size_t getStencil() const
+	{return 0;}
+
+
+	/*! \brief Calculate the stencil offsets
+	 *
+	 * \tparam ginfo grid information object
+	 * \tparam dim2 dimensionality of the starting point
+	 *
+	 * do nothing
+	 *
+	 * \param g grid information
+	 * \param start_p starting point
+	 *
+	 */
+	template<unsigned int dim2, typename ginfo>
+	inline void calc_offsets(const ginfo & g,
+							 const grid_key_dx<dim2> & start_p)
+	{}
+
+	/*! \brief Increment do nothing
+	 *
+	 * do nothing
+	 *
+	 */
+	inline void increment()
+	{}
+
+	/*! \brief Set the stencil points
+	 *
+	 * \param stencil points
+	 *
+	 */
+	template<unsigned int dim2> void set_stencil(const grid_key_dx<dim2> (& stencil_pnt)[1])
+	{
+	}
+
+	/*! \brief Adjust the offset
+	 *
+	 * do nothing
+	 *
+	 * \param i component
+	 * \param idr previous component value
+	 * \param grid_base information of the grid
+	 *
+	 */
+	template<typename ginfo> inline void adjust_offset(size_t i, size_t idr, const ginfo & grid_base)
+	{}
+};
+
+
+
+#endif /* OPENFPM_DATA_SRC_GRID_ITERATORS_STENCIL_TYPE_HPP_ */