| /* roots/fdfsolver.c |
| * |
| * 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. |
| */ |
| |
| #include <config.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <gsl/gsl_errno.h> |
| #include <gsl/gsl_roots.h> |
| |
| gsl_root_fdfsolver * |
| gsl_root_fdfsolver_alloc (const gsl_root_fdfsolver_type * T) |
| { |
| |
| gsl_root_fdfsolver * s = (gsl_root_fdfsolver *) malloc (sizeof (gsl_root_fdfsolver)); |
| |
| if (s == 0) |
| { |
| GSL_ERROR_VAL ("failed to allocate space for root solver struct", |
| GSL_ENOMEM, 0); |
| }; |
| |
| s->state = malloc (T->size); |
| |
| if (s->state == 0) |
| { |
| free (s); /* exception in constructor, avoid memory leak */ |
| |
| GSL_ERROR_VAL ("failed to allocate space for root solver state", |
| GSL_ENOMEM, 0); |
| }; |
| |
| s->type = T ; |
| s->fdf = NULL; |
| |
| return s; |
| } |
| |
| int |
| gsl_root_fdfsolver_set (gsl_root_fdfsolver * s, gsl_function_fdf * f, double root) |
| { |
| s->fdf = f; |
| s->root = root; |
| |
| return (s->type->set) (s->state, s->fdf, &(s->root)); |
| } |
| |
| int |
| gsl_root_fdfsolver_iterate (gsl_root_fdfsolver * s) |
| { |
| return (s->type->iterate) (s->state, s->fdf, &(s->root)); |
| } |
| |
| void |
| gsl_root_fdfsolver_free (gsl_root_fdfsolver * s) |
| { |
| free (s->state); |
| free (s); |
| } |
| |
| const char * |
| gsl_root_fdfsolver_name (const gsl_root_fdfsolver * s) |
| { |
| return s->type->name; |
| } |
| |
| double |
| gsl_root_fdfsolver_root (const gsl_root_fdfsolver * s) |
| { |
| return s->root; |
| } |
| |
| |