1 files changed, 134 insertions, 0 deletions
diff --git a/gsl-1.9/multimin/fminimizer.c b/gsl-1.9/multimin/fminimizer.c
new file mode 100644
index 0000000..507dfd4
--- /dev/null
+++ b/gsl-1.9/multimin/fminimizer.c
@@ -0,0 +1,134 @@
+/* multimin/fminimizer.c
+ * 
+ * Copyright (C) 2002 Tuomo Keskitalo, Ivo Alxneit
+ * 
+ * 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 <gsl/gsl_errno.h>
+#include <gsl/gsl_multimin.h>
+
+gsl_multimin_fminimizer *
+gsl_multimin_fminimizer_alloc (const gsl_multimin_fminimizer_type * T,
+                               size_t n)
+{
+  int status;
+
+  gsl_multimin_fminimizer *s =
+    (gsl_multimin_fminimizer *) malloc (sizeof (gsl_multimin_fminimizer));
+
+  if (s == 0)
+    {
+      GSL_ERROR_VAL ("failed to allocate space for minimizer struct",
+                     GSL_ENOMEM, 0);
+    }
+
+  s->type = T;
+
+  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->state = malloc (T->size);
+
+  if (s->state == 0)
+    {
+      gsl_vector_free (s->x);
+      free (s);
+      GSL_ERROR_VAL ("failed to allocate space for minimizer state",
+                     GSL_ENOMEM, 0);
+    }
+
+  status = (T->alloc) (s->state, n);
+
+  if (status != GSL_SUCCESS)
+    {
+      free (s->state);
+      gsl_vector_free (s->x);
+      free (s);
+
+      GSL_ERROR_VAL ("failed to initialize minimizer state", GSL_ENOMEM, 0);
+    }
+
+  return s;
+}
+
+int
+gsl_multimin_fminimizer_set (gsl_multimin_fminimizer * s,
+                             gsl_multimin_function * f,
+                             const gsl_vector * x,
+                             const gsl_vector * step_size)
+{
+  if (s->x->size != f->n)
+    {
+      GSL_ERROR ("function incompatible with solver size", GSL_EBADLEN);
+    }
+  
+  if (x->size != f->n || step_size->size != f->n) 
+    {
+      GSL_ERROR ("vector length not compatible with function", GSL_EBADLEN);
+    }  
+    
+  s->f = f;
+
+  gsl_vector_memcpy (s->x,x);
+
+  return (s->type->set) (s->state, s->f, s->x, &(s->size), step_size);
+}
+
+void
+gsl_multimin_fminimizer_free (gsl_multimin_fminimizer * s)
+{
+  (s->type->free) (s->state);
+  free (s->state);
+  gsl_vector_free (s->x);
+  free (s);
+}
+
+int
+gsl_multimin_fminimizer_iterate (gsl_multimin_fminimizer * s)
+{
+  return (s->type->iterate) (s->state, s->f, s->x, &(s->size), &(s->fval));
+}
+
+const char * 
+gsl_multimin_fminimizer_name (const gsl_multimin_fminimizer * s)
+{
+  return s->type->name;
+}
+
+
+gsl_vector * 
+gsl_multimin_fminimizer_x (const gsl_multimin_fminimizer * s)
+{
+  return s->x;
+}
+
+double 
+gsl_multimin_fminimizer_minimum (const gsl_multimin_fminimizer * s)
+{
+  return s->fval;
+}
+
+double
+gsl_multimin_fminimizer_size (const gsl_multimin_fminimizer * s)
+{
+  return s->size;
+}