//=============================================================================

//

// Copyright (c) 2020 Marco Colombo

//

// This program is free software: you can redistribute it and/or modify

// it under the terms of the GNU 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 General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

//

//=============================================================================

#include <RcppEigen.h>

// [[Rcpp::export]]

Eigen::MatrixXd multiplyAB(const Eigen::Map<Eigen::MatrixXd>& A,

                           const Eigen::Map<Eigen::MatrixXd>& B) {

  return A * B;

}

// [[Rcpp::export]]

Eigen::MatrixXd multiplyAtB(const Eigen::Map<Eigen::MatrixXd>& A,

                            const Eigen::Map<Eigen::MatrixXd>& B) {

  return A.transpose() * B;

}

// [[Rcpp::export]]

Eigen::MatrixXd multiplyABt(const Eigen::Map<Eigen::MatrixXd>& A,

                            const Eigen::Map<Eigen::MatrixXd>& B) {

  return A * B.transpose();

}