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/* gsl_nan.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough
*
* 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 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
* 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 __GSL_NAN_H__
#define __GSL_NAN_H__
#ifdef INFINITY
# define GSL_POSINF INFINITY
# define GSL_NEGINF (-INFINITY)
#elif defined(HUGE_VAL)
# define GSL_POSINF HUGE_VAL
# define GSL_NEGINF (-HUGE_VAL)
#else
# define GSL_POSINF (gsl_posinf())
# define GSL_NEGINF (gsl_neginf())
#endif
#ifdef NAN
# define GSL_NAN NAN
#elif defined(INFINITY)
# define GSL_NAN (INFINITY/INFINITY)
#else
# define GSL_NAN (gsl_nan())
#endif
#define GSL_POSZERO (+0.0)
#define GSL_NEGZERO (-0.0)
#endif /* __GSL_NAN_H__ */
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