output.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 <ostream>
 
// lal includes
#include <lal/graphs/undirected_graph.hpp>
#include <lal/graphs/directed_graph.hpp>
#include <lal/graphs/rooted_tree.hpp>
 
namespace lal {
namespace graphs {
 
inline std::ostream& operator<< (std::ostream& os, const undirected_graph& g)
noexcept
{
    const auto N = g.get_num_nodes();
    for (node u = 0; u < N; ++u) {
        os << u << ":";
        for (auto v : g.get_neighbors(u)) {
            os << " " << v;
        }
        os << (u < N - 1 ? "\n" : "");
    }
    return os;
}
 
inline std::ostream& operator<< (std::ostream& os, const directed_graph& g)
noexcept
{
    const auto N = g.get_num_nodes();
    os << "out:" << "\n";
    for (node u = 0; u < N; ++u) {
        os << u << ":";
        for (auto v : g.get_out_neighbors(u)) {
            os << " " << v;
        }
        os << (u < N - 1 ? "\n" : "");
    }
    os << "\n" << "in:" << "\n";
    for (node u = 0; u < N; ++u) {
        os << u << ":";
        for (auto v : g.get_in_neighbors(u)) {
            os << " " << v;
        }
        os << (u < N - 1 ? "\n" : "");
    }
    return os;
}
 
inline std::ostream& operator<< (std::ostream& os, const rooted_tree& g)
noexcept
{
    const auto N = g.get_num_nodes();
    const std::string pad = (g.has_root() ? " " : "");
    os << "out:" << "\n";
    for (node u = 0; u < N; ++u) {
        os << (g.has_root() and u == g.get_root() ? "*" : pad) << u << ":";
        for (auto v : g.get_out_neighbors(u)) {
            os << " " << v;
        }
        os << (u < N - 1 ? "\n" : "");
    }
    os << "\n" << "in:" << "\n";
    for (node u = 0; u < N; ++u) {
        os << (g.has_root() and u == g.get_root() ? "*" : pad) << u << ":";
        for (auto v : g.get_in_neighbors(u)) {
            os << " " << v;
        }
        os << (u < N - 1 ? "\n" : "");
    }
    return os;
}
 
} // -- namespace graphs
} // -- namespace lal