1 files changed, 176 insertions, 0 deletions
diff --git a/gsl-1.9/multiroots/fdfsolver.c b/gsl-1.9/multiroots/fdfsolver.c
new file mode 100644
index 0000000..0c34bba
--- /dev/null
+++ b/gsl-1.9/multiroots/fdfsolver.c
@@ -0,0 +1,176 @@
+/* multiroots/fdfsolver.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 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_multiroots.h>
+
+gsl_multiroot_fdfsolver *
+gsl_multiroot_fdfsolver_alloc (const gsl_multiroot_fdfsolver_type * T, 
+                                       size_t n)
+{
+  int status;
+
+  gsl_multiroot_fdfsolver * s;
+
+  s = (gsl_multiroot_fdfsolver *) malloc (sizeof (gsl_multiroot_fdfsolver));
+
+  if (s == 0)
+    {
+      GSL_ERROR_VAL ("failed to allocate space for multiroot solver struct",
+                        GSL_ENOMEM, 0);
+    }
+
+  s->x = gsl_vector_calloc (n);
+
+  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,n);
+
+  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 (n);
+
+  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 multiroot solver state",
+                        GSL_ENOMEM, 0);
+    }
+
+  s->type = T ;
+
+  status = (s->type->alloc)(s->state, n);
+
+  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_multiroot_fdfsolver_set (gsl_multiroot_fdfsolver * s, 
+                             gsl_multiroot_function_fdf * f, 
+                             const gsl_vector * x)
+{
+  if (s->x->size != f->n)
+    {
+      GSL_ERROR ("function incompatible with solver size", GSL_EBADLEN);
+    }
+  
+  if (x->size != f->n) 
+    {
+      GSL_ERROR ("vector length not compatible with function", 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_multiroot_fdfsolver_iterate (gsl_multiroot_fdfsolver * s)
+{
+  return (s->type->iterate) (s->state, s->fdf, s->x, s->f, s->J, s->dx);
+}
+
+void
+gsl_multiroot_fdfsolver_free (gsl_multiroot_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_multiroot_fdfsolver_name (const gsl_multiroot_fdfsolver * s)
+{
+  return s->type->name;
+}
+
+gsl_vector *
+gsl_multiroot_fdfsolver_root (const gsl_multiroot_fdfsolver * s)
+{
+  return s->x;
+}
+
+gsl_vector *
+gsl_multiroot_fdfsolver_dx (const gsl_multiroot_fdfsolver * s)
+{
+  return s->dx;
+}
+
+gsl_vector *
+gsl_multiroot_fdfsolver_f (const gsl_multiroot_fdfsolver * s)
+{
+  return s->f;
+}