Adding missing file

src/NN/CellList/ProcKeys.hpp

+/*
+ * ProcKeys.hpp
+ *
+ *  Created on: Mar 14, 2017
+ *      Author: i-bird
+ */
+
+#ifndef OPENFPM_DATA_SRC_NN_CELLLIST_PROCKEYS_HPP_
+#define OPENFPM_DATA_SRC_NN_CELLLIST_PROCKEYS_HPP_
+
+
+
+/* !Brief Class for a linear (1D-like) order processing of cell keys for CellList_gen implementation
+ *
+ * \tparam dim Dimansionality of the space
+ */
+template<unsigned int dim, typename CellList>
+class Process_keys_lin
+{
+	// stub object
+	openfpm::vector<size_t> keys;
+
+public:
+
+	//! Particle Iterator produced by this key generator
+	typedef ParticleIt_CellP<CellList> Pit;
+
+	/*! \brief Return cellkeys vector
+	 *
+	 * \return vector of cell keys
+	 *
+	 */
+	inline const openfpm::vector<size_t> & getKeys() const
+	{
+		return keys;
+	}
+
+	/*! \brief Get a linear (1D-like) key from the coordinates and add to the getKeys vector
+	 *
+	 * \tparam S Cell list type
+	 *
+	 * \param obj Cell list object
+	 * \param gk grid key
+	 * \param m order of a curve
+	 */
+	template<typename S> static void get_hkey(S & obj, grid_key_dx<dim> gk, size_t m)
+	{
+		size_t point[dim];
+
+		for (size_t i = 0; i < dim; i++)
+		{
+			point[i] = gk.get(i) + obj.getPadding(i);
+		}
+
+		obj.getKeys().add(obj.getGrid().LinIdPtr(static_cast<size_t *>(point)));
+	}
+
+	template<typename S> static void linearize_hkeys(S & obj, size_t m)
+	{
+		return;
+	}
+};
+
+/* !Brief Class for an hilbert order processing of cell keys for CellList_gen implementation
+ *
+ * \tparam dim Dimansionality of the space
+ */
+template<unsigned int dim, typename CellList>
+class Process_keys_hilb
+{
+	// vector for storing the cell keys
+	openfpm::vector<size_t> keys;
+
+	// vector for storing the particle keys
+	openfpm::vector<size_t> p_keys;
+
+	//Order of an hilbert curve
+	size_t m;
+
+public:
+
+	//! Particle Iterator produced by this key generator
+	typedef ParticleIt_CellP<CellList> Pit;
+
+	/*! \brief Return cellkeys vector
+	 *
+	 * \return vector of cell keys
+	 *
+	 */
+	inline const openfpm::vector<size_t> & getKeys() const
+	{
+		return keys;
+	}
+
+	/*! \brief Get an hilbert key from the coordinates and add to the getKeys vector
+	 *
+	 * \tparam S Cell list type
+	 *
+	 * \param obj Cell list object
+	 * \param gk grid key
+	 * \param m order of a curve
+	 */
+	template<typename S> inline void get_hkey(S & obj, grid_key_dx<dim> gk, size_t m)
+	{
+		//An integer to handle errors
+		int err;
+
+		uint64_t point[dim];
+
+		for (size_t i = 0; i < dim; i++)
+		{
+			point[i] = gk.get(i);
+		}
+
+		size_t hkey = getHKeyFromIntCoord(m, dim, point, &err);
+
+		obj.getKeys().add(hkey);
+	}
+
+	/*! \brief Get get the coordinates from hilbert key, linearize and add to the getKeys vector
+	 *
+	 * \tparam S Cell list type
+	 *
+	 * \param obj Cell list object
+	 * \param m order of a curve
+	 */
+	template<typename S> inline void linearize_hkeys(S & obj, size_t m)
+	{
+		//An integer to handle errors
+		int err;
+
+		//Array to handle output
+		uint64_t coord[dim];
+		size_t coord2[dim];
+
+		obj.getKeys().sort();
+
+		openfpm::vector<size_t> keys_new;
+
+		for(size_t i = 0; i < obj.getKeys().size(); i++)
+		{
+			getIntCoordFromHKey(coord, m, dim, obj.getKeys().get(i), &err);
+
+			for (size_t j = 0 ; j < dim ; j++)	{coord2[j] = coord[j] + obj.getPadding(j);}
+
+			keys_new.add(obj.getGrid().LinIdPtr(static_cast<size_t *>(coord2)));
+		}
+
+		obj.getKeys().swap(keys_new);
+	}
+};
+
+#endif /* OPENFPM_DATA_SRC_NN_CELLLIST_PROCKEYS_HPP_ */