| /* gsl_nan.h |
| * |
| * Copyright (C) 1996, 1997, 1998, 1999, 2000 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 2 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) |
| #define GSL_NEGZERO (-0) |
| |
| #endif /* __GSL_NAN_H__ */ |
