1 files changed, 82 insertions, 0 deletions
diff --git a/gsl-1.9/interpolation/accel.c b/gsl-1.9/interpolation/accel.c
new file mode 100644
index 0000000..72d9345
--- /dev/null
+++ b/gsl-1.9/interpolation/accel.c
@@ -0,0 +1,82 @@
+/* interpolation/accel.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
+ * 
+ * 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.
+ */
+
+/* Author:  G. Jungman
+ */
+#include <config.h>
+#include <stdlib.h>
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_interp.h>
+
+gsl_interp_accel *
+gsl_interp_accel_alloc (void)
+{
+  gsl_interp_accel *a = (gsl_interp_accel *) malloc (sizeof (gsl_interp_accel));
+  if (a == 0)
+    {
+      GSL_ERROR_NULL("could not allocate space for gsl_interp_accel", GSL_ENOMEM);
+    }
+
+  a->cache = 0;
+  a->hit_count = 0;
+  a->miss_count = 0;
+
+  return a;
+}
+
+int
+gsl_interp_accel_reset (gsl_interp_accel * a)
+{
+  a->cache = 0;
+  a->hit_count = 0;
+  a->miss_count = 0;
+
+  return GSL_SUCCESS;
+}
+
+#ifndef HIDE_INLINE_STATIC
+size_t
+gsl_interp_accel_find (gsl_interp_accel * a, const double xa[], size_t len, double x)
+{
+  size_t x_index = a->cache;
+
+  if (x < xa[x_index])
+    {
+      a->miss_count++;
+      a->cache = gsl_interp_bsearch (xa, x, 0, x_index);
+    }
+  else if (x > xa[x_index + 1])
+    {
+      a->miss_count++;
+      a->cache = gsl_interp_bsearch (xa, x, x_index, len - 1);
+    }
+  else
+    {
+      a->hit_count++;
+    }
+
+  return a->cache;
+}
+#endif
+
+void
+gsl_interp_accel_free (gsl_interp_accel * a)
+{
+  free (a);
+}