forked from bartvdbraak/blender
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
/**
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* $Id$
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef GEN_LIST_H
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#define GEN_LIST_H
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class GEN_Link {
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public:
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GEN_Link() : m_next(0), m_prev(0) {}
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GEN_Link(GEN_Link *next, GEN_Link *prev) : m_next(next), m_prev(prev) {}
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GEN_Link *getNext() const { return m_next; }
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GEN_Link *getPrev() const { return m_prev; }
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bool isHead() const { return m_prev == 0; }
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bool isTail() const { return m_next == 0; }
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void insertBefore(GEN_Link *link) {
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m_next = link;
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m_prev = link->m_prev;
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m_next->m_prev = this;
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m_prev->m_next = this;
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}
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void insertAfter(GEN_Link *link) {
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m_next = link->m_next;
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m_prev = link;
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m_next->m_prev = this;
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m_prev->m_next = this;
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}
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void remove() {
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m_next->m_prev = m_prev;
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m_prev->m_next = m_next;
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}
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private:
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GEN_Link *m_next;
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GEN_Link *m_prev;
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};
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class GEN_List {
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public:
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GEN_List() : m_head(&m_tail, 0), m_tail(0, &m_head) {}
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GEN_Link *getHead() const { return m_head.getNext(); }
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GEN_Link *getTail() const { return m_tail.getPrev(); }
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void addHead(GEN_Link *link) { link->insertAfter(&m_head); }
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void addTail(GEN_Link *link) { link->insertBefore(&m_tail); }
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private:
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GEN_Link m_head;
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GEN_Link m_tail;
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};
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#endif
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