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- /* multifit/fdfsolver.c
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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.
- */
- #include "gsl__config.h"
- #include <stdlib.h>
- #include <string.h>
- #include "gsl_errno.h"
- #include "gsl_multifit_nlin.h"
- gsl_multifit_fdfsolver *
- gsl_multifit_fdfsolver_alloc (const gsl_multifit_fdfsolver_type * T,
- size_t n, size_t p)
- {
- int status;
- gsl_multifit_fdfsolver * s;
- if (n < p)
- {
- GSL_ERROR_VAL ("insufficient data points, n < p", GSL_EINVAL, 0);
- }
- s = (gsl_multifit_fdfsolver *) malloc (sizeof (gsl_multifit_fdfsolver));
- if (s == 0)
- {
- GSL_ERROR_VAL ("failed to allocate space for multifit solver struct",
- GSL_ENOMEM, 0);
- }
- s->x = gsl_vector_calloc (p);
- if (s->x == 0)
- {
- free (s);
- GSL_ERROR_VAL ("failed to allocate space for x", GSL_ENOMEM, 0);
- }
- s->f = gsl_vector_calloc (n);
- if (s->f == 0)
- {
- gsl_vector_free (s->x);
- free (s);
- GSL_ERROR_VAL ("failed to allocate space for f", GSL_ENOMEM, 0);
- }
- s->J = gsl_matrix_calloc (n,p);
- if (s->J == 0)
- {
- gsl_vector_free (s->x);
- gsl_vector_free (s->f);
- free (s);
- GSL_ERROR_VAL ("failed to allocate space for g", GSL_ENOMEM, 0);
- }
- s->dx = gsl_vector_calloc (p);
- if (s->dx == 0)
- {
- gsl_matrix_free (s->J);
- gsl_vector_free (s->x);
- gsl_vector_free (s->f);
- free (s);
- GSL_ERROR_VAL ("failed to allocate space for dx", GSL_ENOMEM, 0);
- }
- s->state = malloc (T->size);
- if (s->state == 0)
- {
- gsl_vector_free (s->dx);
- gsl_vector_free (s->x);
- gsl_vector_free (s->f);
- gsl_matrix_free (s->J);
- free (s); /* exception in constructor, avoid memory leak */
-
- GSL_ERROR_VAL ("failed to allocate space for multifit solver state",
- GSL_ENOMEM, 0);
- }
- s->type = T ;
- status = (s->type->alloc)(s->state, n, p);
- if (status != GSL_SUCCESS)
- {
- free (s->state);
- gsl_vector_free (s->dx);
- gsl_vector_free (s->x);
- gsl_vector_free (s->f);
- gsl_matrix_free (s->J);
- free (s); /* exception in constructor, avoid memory leak */
-
- GSL_ERROR_VAL ("failed to set solver", status, 0);
- }
- s->fdf = NULL;
- return s;
- }
- int
- gsl_multifit_fdfsolver_set (gsl_multifit_fdfsolver * s,
- gsl_multifit_function_fdf * f,
- const gsl_vector * x)
- {
- if (s->f->size != f->n)
- {
- GSL_ERROR ("function size does not match solver", GSL_EBADLEN);
- }
- if (s->x->size != x->size)
- {
- GSL_ERROR ("vector length does not match solver", GSL_EBADLEN);
- }
- s->fdf = f;
- gsl_vector_memcpy(s->x,x);
-
- return (s->type->set) (s->state, s->fdf, s->x, s->f, s->J, s->dx);
- }
- int
- gsl_multifit_fdfsolver_iterate (gsl_multifit_fdfsolver * s)
- {
- return (s->type->iterate) (s->state, s->fdf, s->x, s->f, s->J, s->dx);
- }
- void
- gsl_multifit_fdfsolver_free (gsl_multifit_fdfsolver * s)
- {
- (s->type->free) (s->state);
- free (s->state);
- gsl_vector_free (s->dx);
- gsl_vector_free (s->x);
- gsl_vector_free (s->f);
- gsl_matrix_free (s->J);
- free (s);
- }
- const char *
- gsl_multifit_fdfsolver_name (const gsl_multifit_fdfsolver * s)
- {
- return s->type->name;
- }
- gsl_vector *
- gsl_multifit_fdfsolver_position (const gsl_multifit_fdfsolver * s)
- {
- return s->x;
- }
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