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

namespace newarp {

template <typename eT, int SelectionRule, typename OpType>
inline void SymEigsShiftSolver<eT, SelectionRule, OpType>::sort_ritzpair() {
  arma_extra_debug_sigprint();

  // First transform back the Ritz values, and then sort
  for (uword i = 0; i < this->nev; i++) {
    this->ritz_val(i) = eT(1.0) / this->ritz_val(i) + sigma;
  }
  SymEigsSolver<eT, SelectionRule, OpType>::sort_ritzpair();
}

template <typename eT, int SelectionRule, typename OpType>
inline SymEigsShiftSolver<eT, SelectionRule, OpType>::SymEigsShiftSolver(
    const OpType& op_, uword nev_, uword ncv_, const eT sigma_)
    : SymEigsSolver<eT, SelectionRule, OpType>::SymEigsSolver(op_, nev_, ncv_),
      sigma(sigma_) {
  arma_extra_debug_sigprint();
}

}  // namespace newarp
