libcruft-util/polynomial.hpp

/*
 * This file is part of libgim.
 *
 * libgim 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.
 *
 * libgim 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 libgim.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright 2015 Danny Robson <danny@nerdcruft.net>
 */

#ifndef __UTIL_POLYNOMIAL_HPP
#define __UTIL_POLYNOMIAL_HPP

#include <array>
#include <cstdlib>

namespace util {
    namespace polynomial {
        // Invalid solutions are represented by NaN. They are guaranteed to
        // be at the end of the solution list, so they are safe to skip on the
        // first instance.
        template <size_t S>
        std::array<float,S>
        solve (std::array<float,S+1>);

        template <size_t S>
        float
        eval (std::array<float,S>, float x);
    }
}

#endif