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/* 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;
}
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