// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------

#if defined(ARMA_USE_FFTW3)

namespace fftw3 {
template <typename eT>
arma_inline void_ptr plan_dft_1d(int N, eT* input, eT* output, int fftw3_sign,
                                 unsigned int fftw3_flags) {
  arma_type_check((is_cx<eT>::value == false));

  if (is_cx_float<eT>::value) {
    return fftwf_plan_dft_1d(N, (cx_float*)input, (cx_float*)output, fftw3_sign,
                             fftw3_flags);
  } else if (is_cx_double<eT>::value) {
    return fftw_plan_dft_1d(N, (cx_double*)input, (cx_double*)output, fftw3_sign,
                            fftw3_flags);
  }

  return nullptr;
}

template <typename eT>
arma_inline void execute(void_ptr plan) {
  arma_type_check((is_cx<eT>::value == false));

  if (is_cx_float<eT>::value) {
    fftwf_execute(plan);
  } else if (is_cx_double<eT>::value) {
    fftw_execute(plan);
  }
}

template <typename eT>
arma_inline void destroy_plan(void_ptr plan) {
  arma_type_check((is_cx<eT>::value == false));

  if (is_cx_float<eT>::value) {
    fftwf_destroy_plan(plan);
  } else if (is_cx_double<eT>::value) {
    fftw_destroy_plan(plan);
  }
}

template <typename eT>
arma_inline void cleanup() {
  arma_type_check((is_cx<eT>::value == false));

  if (is_cx_float<eT>::value) {
    fftwf_cleanup();
  } else if (is_cx_double<eT>::value) {
    fftw_cleanup();
  }
}
}  // namespace fftw3

#endif
