/* roots/roots.h

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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 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.

 */

/* 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 (!gsl_finite(*yp)) \

    GSL_ERROR("function value is not finite", GSL_EBADFUNC); \

} while (0)

#endif /* __ROOTS_H__ */