1 /* multiroots/fdfsolver.c
3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 #include <gsl/gsl_errno.h>
24 #include <gsl/gsl_multiroots.h>
26 gsl_multiroot_fdfsolver *
27 gsl_multiroot_fdfsolver_alloc (const gsl_multiroot_fdfsolver_type * T,
32 gsl_multiroot_fdfsolver * s;
34 s = (gsl_multiroot_fdfsolver *) malloc (sizeof (gsl_multiroot_fdfsolver));
38 GSL_ERROR_VAL ("failed to allocate space for multiroot solver struct",
42 s->x = gsl_vector_calloc (n);
47 GSL_ERROR_VAL ("failed to allocate space for x", GSL_ENOMEM, 0);
50 s->f = gsl_vector_calloc (n);
54 gsl_vector_free (s->x);
56 GSL_ERROR_VAL ("failed to allocate space for f", GSL_ENOMEM, 0);
59 s->J = gsl_matrix_calloc (n,n);
63 gsl_vector_free (s->x);
64 gsl_vector_free (s->f);
66 GSL_ERROR_VAL ("failed to allocate space for g", GSL_ENOMEM, 0);
69 s->dx = gsl_vector_calloc (n);
73 gsl_matrix_free (s->J);
74 gsl_vector_free (s->x);
75 gsl_vector_free (s->f);
77 GSL_ERROR_VAL ("failed to allocate space for dx", GSL_ENOMEM, 0);
80 s->state = malloc (T->size);
84 gsl_vector_free (s->dx);
85 gsl_vector_free (s->x);
86 gsl_vector_free (s->f);
87 gsl_matrix_free (s->J);
88 free (s); /* exception in constructor, avoid memory leak */
90 GSL_ERROR_VAL ("failed to allocate space for multiroot solver state",
96 status = (s->type->alloc)(s->state, n);
98 if (status != GSL_SUCCESS)
101 gsl_vector_free (s->dx);
102 gsl_vector_free (s->x);
103 gsl_vector_free (s->f);
104 gsl_matrix_free (s->J);
105 free (s); /* exception in constructor, avoid memory leak */
107 GSL_ERROR_VAL ("failed to set solver", status, 0);
116 gsl_multiroot_fdfsolver_set (gsl_multiroot_fdfsolver * s,
117 gsl_multiroot_function_fdf * f,
118 const gsl_vector * x)
120 if (s->x->size != f->n)
122 GSL_ERROR ("function incompatible with solver size", GSL_EBADLEN);
127 GSL_ERROR ("vector length not compatible with function", GSL_EBADLEN);
131 gsl_vector_memcpy(s->x,x);
133 return (s->type->set) (s->state, s->fdf, s->x, s->f, s->J, s->dx);
137 gsl_multiroot_fdfsolver_iterate (gsl_multiroot_fdfsolver * s)
139 return (s->type->iterate) (s->state, s->fdf, s->x, s->f, s->J, s->dx);
143 gsl_multiroot_fdfsolver_free (gsl_multiroot_fdfsolver * s)
145 (s->type->free) (s->state);
147 gsl_vector_free (s->dx);
148 gsl_vector_free (s->x);
149 gsl_vector_free (s->f);
150 gsl_matrix_free (s->J);
155 gsl_multiroot_fdfsolver_name (const gsl_multiroot_fdfsolver * s)
157 return s->type->name;
161 gsl_multiroot_fdfsolver_root (const gsl_multiroot_fdfsolver * s)
167 gsl_multiroot_fdfsolver_dx (const gsl_multiroot_fdfsolver * s)
173 gsl_multiroot_fdfsolver_f (const gsl_multiroot_fdfsolver * s)