// 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 eGlue
//! @{

template <typename T1, typename T2, typename eglue_type>
arma_inline eGlue<T1, T2, eglue_type>::~eGlue() {
  arma_debug_sigprint();
}

template <typename T1, typename T2, typename eglue_type>
arma_inline eGlue<T1, T2, eglue_type>::eGlue(const T1& in_A, const T2& in_B)
    : P1(in_A), P2(in_B) {
  arma_debug_sigprint();

  // arma_conform_assert_same_size( P1, P2, eglue_type::text() );
  arma_conform_assert_same_size(P1.get_n_rows(), P1.get_n_cols(), P2.get_n_rows(),
                                P2.get_n_cols(), eglue_type::text());
}

template <typename T1, typename T2, typename eglue_type>
template <typename eT2>
inline bool eGlue<T1, T2, eglue_type>::is_alias(const Mat<eT2>& X) const {
  return (P1.is_alias(X) || P2.is_alias(X));
}

template <typename T1, typename T2, typename eglue_type>
arma_inline uword eGlue<T1, T2, eglue_type>::get_n_rows() const {
  return is_row ? 1 : P1.get_n_rows();
}

template <typename T1, typename T2, typename eglue_type>
arma_inline uword eGlue<T1, T2, eglue_type>::get_n_cols() const {
  return is_col ? 1 : P1.get_n_cols();
}

template <typename T1, typename T2, typename eglue_type>
arma_inline uword eGlue<T1, T2, eglue_type>::get_n_elem() const {
  return P1.get_n_elem();
}

template <typename T1, typename T2, typename eglue_type>
arma_inline typename T1::elem_type eGlue<T1, T2, eglue_type>::operator[](
    const uword ii) const {
  // the optimiser will keep only one return statement

  typedef typename T1::elem_type eT;

  if (is_same_type<eglue_type, eglue_plus>::yes) {
    return P1[ii] + P2[ii];
  } else if (is_same_type<eglue_type, eglue_minus>::yes) {
    return P1[ii] - P2[ii];
  } else if (is_same_type<eglue_type, eglue_div>::yes) {
    return P1[ii] / P2[ii];
  } else if (is_same_type<eglue_type, eglue_schur>::yes) {
    return P1[ii] * P2[ii];
  } else
    return eT(0);
}

template <typename T1, typename T2, typename eglue_type>
arma_inline typename T1::elem_type eGlue<T1, T2, eglue_type>::at(const uword row,
                                                                 const uword col) const {
  // the optimiser will keep only one return statement

  typedef typename T1::elem_type eT;

  if (is_same_type<eglue_type, eglue_plus>::yes) {
    return P1.at(row, col) + P2.at(row, col);
  } else if (is_same_type<eglue_type, eglue_minus>::yes) {
    return P1.at(row, col) - P2.at(row, col);
  } else if (is_same_type<eglue_type, eglue_div>::yes) {
    return P1.at(row, col) / P2.at(row, col);
  } else if (is_same_type<eglue_type, eglue_schur>::yes) {
    return P1.at(row, col) * P2.at(row, col);
  } else
    return eT(0);
}

template <typename T1, typename T2, typename eglue_type>
arma_inline typename T1::elem_type eGlue<T1, T2, eglue_type>::at_alt(
    const uword ii) const {
  // the optimiser will keep only one return statement

  typedef typename T1::elem_type eT;

  if (is_same_type<eglue_type, eglue_plus>::yes) {
    return P1.at_alt(ii) + P2.at_alt(ii);
  } else if (is_same_type<eglue_type, eglue_minus>::yes) {
    return P1.at_alt(ii) - P2.at_alt(ii);
  } else if (is_same_type<eglue_type, eglue_div>::yes) {
    return P1.at_alt(ii) / P2.at_alt(ii);
  } else if (is_same_type<eglue_type, eglue_schur>::yes) {
    return P1.at_alt(ii) * P2.at_alt(ii);
  } else
    return eT(0);
}

//! @}
