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/* gsl_nan.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __GSL_NAN_H__
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#define __GSL_NAN_H__
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#ifdef INFINITY
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# define GSL_POSINF INFINITY
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# define GSL_NEGINF (-INFINITY)
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#elif defined(HUGE_VAL)
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# define GSL_POSINF HUGE_VAL
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# define GSL_NEGINF (-HUGE_VAL)
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#else
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# define GSL_POSINF (gsl_posinf())
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# define GSL_NEGINF (gsl_neginf())
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#endif
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#ifdef NAN
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# define GSL_NAN NAN
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#elif defined(INFINITY)
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# define GSL_NAN (INFINITY/INFINITY)
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#else
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# define GSL_NAN (gsl_nan())
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#endif
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#define GSL_POSZERO (+0.0)
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#define GSL_NEGZERO (-0.0)
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#endif /* __GSL_NAN_H__ */
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