// 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.
// ------------------------------------------------------------------------

//! \addtogroup GenCube
//! @{

template <typename eT, typename gen_type>
arma_inline GenCube<eT, gen_type>::GenCube(const uword in_n_rows, const uword in_n_cols,
                                           const uword in_n_slices)
    : n_rows(in_n_rows), n_cols(in_n_cols), n_slices(in_n_slices) {
  arma_debug_sigprint();
}

template <typename eT, typename gen_type>
arma_inline GenCube<eT, gen_type>::~GenCube() {
  arma_debug_sigprint();
}

template <typename eT, typename gen_type>
arma_inline eT GenCube<eT, gen_type>::operator[](const uword) const {
  if (is_same_type<gen_type, gen_zeros>::yes) {
    return eT(0);
  } else if (is_same_type<gen_type, gen_ones>::yes) {
    return eT(1);
  }

  return eT(0);  // prevent pedantic compiler warnings
}

template <typename eT, typename gen_type>
arma_inline eT GenCube<eT, gen_type>::at(const uword, const uword, const uword) const {
  if (is_same_type<gen_type, gen_zeros>::yes) {
    return eT(0);
  } else if (is_same_type<gen_type, gen_ones>::yes) {
    return eT(1);
  }

  return eT(0);  // prevent pedantic compiler warnings
}

template <typename eT, typename gen_type>
arma_inline eT GenCube<eT, gen_type>::at_alt(const uword) const {
  if (is_same_type<gen_type, gen_zeros>::yes) {
    return eT(0);
  } else if (is_same_type<gen_type, gen_ones>::yes) {
    return eT(1);
  }

  return eT(0);  // prevent pedantic compiler warnings
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply(Cube<eT>& out) const {
  arma_debug_sigprint();

  // NOTE: we're assuming that the cube has already been set to the correct size;
  // this is done by either the Cube contructor or operator=()

  if (is_same_type<gen_type, gen_zeros>::yes) {
    out.zeros();
  } else if (is_same_type<gen_type, gen_ones>::yes) {
    out.ones();
  }
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply_inplace_plus(Cube<eT>& out) const {
  arma_debug_sigprint();

  arma_conform_assert_same_size(out.n_rows, out.n_cols, out.n_slices, n_rows, n_cols,
                                n_slices, "addition");

  if (is_same_type<gen_type, gen_ones>::yes) {
    arrayops::inplace_plus(out.memptr(), eT(1), out.n_elem);
  }
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply_inplace_minus(Cube<eT>& out) const {
  arma_debug_sigprint();

  arma_conform_assert_same_size(out.n_rows, out.n_cols, out.n_slices, n_rows, n_cols,
                                n_slices, "subtraction");

  if (is_same_type<gen_type, gen_ones>::yes) {
    arrayops::inplace_minus(out.memptr(), eT(1), out.n_elem);
  }
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply_inplace_schur(Cube<eT>& out) const {
  arma_debug_sigprint();

  arma_conform_assert_same_size(out.n_rows, out.n_cols, out.n_slices, n_rows, n_cols,
                                n_slices, "element-wise multiplication");

  if (is_same_type<gen_type, gen_zeros>::yes) {
    arrayops::inplace_mul(out.memptr(), eT(0), out.n_elem);
    // NOTE: not using arrayops::fill_zeros(), as 'out' may have NaN elements
  }
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply_inplace_div(Cube<eT>& out) const {
  arma_debug_sigprint();

  arma_conform_assert_same_size(out.n_rows, out.n_cols, out.n_slices, n_rows, n_cols,
                                n_slices, "element-wise division");

  if (is_same_type<gen_type, gen_zeros>::yes) {
    arrayops::inplace_div(out.memptr(), eT(0), out.n_elem);
  }
}

template <typename eT, typename gen_type>
inline void GenCube<eT, gen_type>::apply(subview_cube<eT>& out) const {
  arma_debug_sigprint();

  // NOTE: we're assuming that the subcube has the same dimensions as the GenCube object
  // this is checked by subview_cube::operator=()

  if (is_same_type<gen_type, gen_zeros>::yes) {
    out.zeros();
  } else if (is_same_type<gen_type, gen_ones>::yes) {
    out.ones();
  }
}

//! @}
