SparseMatClusterLIS.hpp

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/*******************************************************************************
 * Copyright (C) 2017-2025 Theodore Chang
 *
 * 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/>.
 ******************************************************************************/
#ifndef SPARSEMATMPILIS_HPP
#define SPARSEMATMPILIS_HPP
 
#include "../SparseMat.hpp"
 
#include <ezp/ezp/lis.hpp>
 
template<sp_d T> class SparseMatClusterLIS final : public SparseMat<T> {
    ezp::lis solver{};
 
    csr_form<LIS_SCALAR, LIS_INT> csr_mat{};
 
    int solve_full(Mat<T>&);
 
protected:
    int direct_solve(Mat<T>& X, Mat<T>&& B) override { return this->solve_full(X = std::move(B)); }
 
    int direct_solve(Mat<T>& X, const Mat<T>& B) override { return this->solve_full(X = B); }
 
public:
    using SparseMat<T>::SparseMat;
 
    unique_ptr<MetaMat<T>> make_copy() override { return std::make_unique<SparseMatClusterLIS>(*this); }
};
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"
template<sp_d T> int SparseMatClusterLIS<T>::solve_full(Mat<T>& X) {
    la_it info{-1};
 
    solver.set_option(this->setting.option.c_str());
 
    if(this->factored) info = solver.solve({X.n_rows, X.n_cols, X.memptr()});
    else {
        this->factored = true;
 
        csr_mat = csr_form<LIS_SCALAR, LIS_INT>(this->triplet_mat, SparseBase::ZERO, false);
 
        info = solver.solve({csr_mat.n_rows, csr_mat.n_elem, csr_mat.row_mem(), csr_mat.col_mem(), csr_mat.val_mem()}, {X.n_rows, X.n_cols, X.memptr()});
    }
 
    if(0 == info) bcast_from_root(X);
    else suanpan_error("Error code {} received.\n", info);
 
    return info;
}
#pragma GCC diagnostic pop
 
#endif