/* roots/roots.h * * Copyright (C) 1996, 1997, 1998, 1999, 2000 Reid Priedhorsky, 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. */ /* roots.h -- declarations for internal root finding and RF support stuff. */ #ifndef __ROOTS_H__ #define __ROOTS_H__ /* Call the pointed-to function with argument x, put its result in y, and return an error if the function value is Inf/Nan. */ #define SAFE_FUNC_CALL(f, x, yp) \ do { \ *yp = GSL_FN_EVAL(f,x); \ if (!finite(*yp)) \ GSL_ERROR("function value is not finite", GSL_EBADFUNC); \ } while (0) #endif /* __ROOTS_H__ */

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