/** * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) * * This program 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. * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . */ package datastructures.linkedlists; /** * Sentinel doubly linked list class. A linked * list is a list constructed from nodes, which * hold stored values, with references to each * other, this is usally an ineffective data * structure, especially on high-level object * orientated languages. A doubly linked list * stores nodes with references to the both the * following node previous node. A sentinel * linked list increses performance and reduces * complexity by tracking the edges implicitly * rather than explicitly; instead of having * reference to the first and last node, a * sentinel linked list have an extra node, * {@link #edge}, is placed at both the end and * the beginning of the linked list — the list * acts as linear but is constructed as circular * — and rather than checking that the next node * or previous node is not {@code null} you check * that it is not {@link #edge}. This implemention * only implements methods that do not require * iterating over all nodes for find a specific; * all other methods' — those that are implemented * — time complexity is Θ(1). * * @param The value stored in the structure */ £>export name=SentinelDoublyLinkedList array=0 with_sentinel=1 with_head=0 with_tail=0 with_prev=1 with_xor=0 £>$GPP -s £ < src/datastructures/linkedlists/template | sed -e '/^[/ ]\*/d' -e '/^$/d'