rand_planar_arrangements.hpp

/*********************************************************************
 *
 * Linear Arrangement Library - A library that implements a collection
 * algorithms for linear arrangments of graphs.
 *
 * Copyright (C) 2019 - 2024
 *
 * This file is part of Linear Arrangement Library. The full code is available
 * at:
 *      https://github.com/LAL-project/linear-arrangement-library.git
 *
 * Linear Arrangement Library is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Linear Arrangement Library 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Linear Arrangement Library.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contact:
 *
 *     Lluís Alemany Puig (lluis.alemany.puig@upc.edu)
 *         LQMC (Quantitative, Mathematical, and Computational Linguisitcs)
 *         CQL (Complexity and Quantitative Linguistics Lab)
 *         Jordi Girona St 1-3, Campus Nord UPC, 08034 Barcelona.   CATALONIA, SPAIN
 *         Webpage: https://cqllab.upc.edu/people/lalemany/
 *
 *     Ramon Ferrer i Cancho (rferrericancho@cs.upc.edu)
 *         LQMC (Quantitative, Mathematical, and Computational Linguisitcs)
 *         CQL (Complexity and Quantitative Linguistics Lab)
 *         Office 220, Omega building
 *         Jordi Girona St 1-3, Campus Nord UPC, 08034 Barcelona.   CATALONIA, SPAIN
 *         Webpage: https://cqllab.upc.edu/people/rferrericancho/
 *
 ********************************************************************/
 
#pragma once
 
// C++ includes
#include <random>
 
// lal includes
#include <lal/linear_arrangement.hpp>
#include <lal/graphs/rooted_tree.hpp>
#include <lal/detail/array.hpp>
 
namespace lal {
namespace generate {
 
class rand_planar_arrangements {
public:
    /* CONSTRUCTORS */
 
    rand_planar_arrangements(const graphs::free_tree& T, const uint64_t seed = 0) noexcept;
 
    rand_planar_arrangements(const graphs::rooted_tree& T, const uint64_t seed = 0) noexcept;
 
    rand_planar_arrangements(const rand_planar_arrangements& Gen) noexcept = default;
 
    rand_planar_arrangements(rand_planar_arrangements&& Gen) noexcept = default;
 
    ~rand_planar_arrangements() = default;
 
    /* GETTERS */
 
    [[nodiscard]] linear_arrangement get_arrangement() noexcept;
 
    [[nodiscard]] linear_arrangement yield_arrangement() noexcept {
        return get_arrangement();
    }
 
private:
    graphs::free_tree m_T_copy;
    const graphs::free_tree& m_T;
 
    detail::array<std::vector<node>> m_rdata;
 
    node m_previous_root;
 
    std::mt19937 m_gen;
};
 
} // -- namespace generate
} // -- namespace lal