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/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program 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 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program 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 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifndef GEN_LIST_H
#define GEN_LIST_H
class GEN_Link {
public:
GEN_Link() : m_next(0), m_prev(0) {}
GEN_Link(GEN_Link *next, GEN_Link *prev) : m_next(next), m_prev(prev) {}
GEN_Link *getNext() const { return m_next; }
GEN_Link *getPrev() const { return m_prev; }
bool isHead() const { return m_prev == 0; }
bool isTail() const { return m_next == 0; }
void insertBefore(GEN_Link *link) {
m_next = link;
m_prev = link->m_prev;
m_next->m_prev = this;
m_prev->m_next = this;
}
void insertAfter(GEN_Link *link) {
m_next = link->m_next;
m_prev = link;
m_next->m_prev = this;
m_prev->m_next = this;
}
void remove() {
m_next->m_prev = m_prev;
m_prev->m_next = m_next;
}
private:
GEN_Link *m_next;
GEN_Link *m_prev;
};
class GEN_List {
public:
GEN_List() : m_head(&m_tail, 0), m_tail(0, &m_head) {}
GEN_Link *getHead() const { return m_head.getNext(); }
GEN_Link *getTail() const { return m_tail.getPrev(); }
void addHead(GEN_Link *link) { link->insertAfter(&m_head); }
void addTail(GEN_Link *link) { link->insertBefore(&m_tail); }
private:
GEN_Link m_head;
GEN_Link m_tail;
};
#endif
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