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fftransform_fftw.hh
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			/**
			* @file
			* @section LICENSE
			*
			* Copyright (©) 2016-19 EPFL (École Polytechnique Fédérale de Lausanne),
			* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
			*
			* This program is free software: you can redistribute it and/or modify
			* it under the terms of the GNU Affero General Public License as published
			* by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
			*
			* You should have received a copy of the GNU Affero General Public License
			* along with this program. If not, see <https://www.gnu.org/licenses/>.
			*
			*/

			/* -------------------------------------------------------------------------- */

			#ifndef FFTRANSFORM_FFTW_HH
			#define FFTRANSFORM_FFTW_HH

			#include "fftransform.hh"
			#include <fftw3.h>

			__BEGIN_TAMAAS__

			/**
			* @brief Class wrapping fftw's interface
			*/
			template <typename T, UInt dim>
			class FFTransformFFTW : public FFTransform<T, dim> {
			public:
			/// Constructor
			FFTransformFFTW(Grid<T, dim>& real, GridHermitian<T, dim>& spectral);

			/// Destructor
			virtual ~FFTransformFFTW();

			public:
			/// Perform FFT
			void forwardTransform() override;

			/// Perform IFFT
			void backwardTransform() override;

			private:
			fftw_plan forward_plan;
			fftw_plan backward_plan;
			};

			__END_TAMAAS__

			#endif // FFTRANSFORM_FFTW_HH