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/* roots/fdfsolver.c
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Reid Priedhorsky, Brian Gough
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gsl/gsl_errno.h>
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#include <gsl/gsl_roots.h>
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gsl_root_fdfsolver *
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gsl_root_fdfsolver_alloc (const gsl_root_fdfsolver_type * T)
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{
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gsl_root_fdfsolver * s = (gsl_root_fdfsolver *) malloc (sizeof (gsl_root_fdfsolver));
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if (s == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for root solver struct",
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GSL_ENOMEM, 0);
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};
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s->state = malloc (T->size);
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if (s->state == 0)
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{
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free (s); /* exception in constructor, avoid memory leak */
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GSL_ERROR_VAL ("failed to allocate space for root solver state",
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GSL_ENOMEM, 0);
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};
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s->type = T ;
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s->fdf = NULL;
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return s;
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}
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int
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gsl_root_fdfsolver_set (gsl_root_fdfsolver * s, gsl_function_fdf * f, double root)
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{
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s->fdf = f;
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s->root = root;
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return (s->type->set) (s->state, s->fdf, &(s->root));
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}
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int
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gsl_root_fdfsolver_iterate (gsl_root_fdfsolver * s)
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{
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return (s->type->iterate) (s->state, s->fdf, &(s->root));
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}
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void
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gsl_root_fdfsolver_free (gsl_root_fdfsolver * s)
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{
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RETURN_IF_NULL (s);
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free (s->state);
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free (s);
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}
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const char *
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gsl_root_fdfsolver_name (const gsl_root_fdfsolver * s)
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{
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return s->type->name;
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}
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double
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gsl_root_fdfsolver_root (const gsl_root_fdfsolver * s)
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{
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return s->root;
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}
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