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/* eurephia_directions.h -- Macro to decide the best search directon on dual-way pointer chains
*
* GPLv2 - Copyright (C) 2008 David Sommerseth <dazo@users.sourceforge.net>
*
* 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; version 2
* of the License.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef _EUREPHIA_DIRECTIONS_H
#define _EUREPHIA_DIRECTIONS_H
#define DIR_R 'R'
#define DIR_L 'L'
#define DIRECTION(s,d,l) (s>d ? ((((l-s)+d) > (s-d)) ? DIR_L : DIR_R) : (((d-s) > ((l-d)+s)) ? DIR_L : DIR_R))
#endif
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