1 files changed, 47 insertions, 0 deletions
diff --git a/gsl-1.9/interpolation/bsearch.c b/gsl-1.9/interpolation/bsearch.c
new file mode 100644
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--- /dev/null
+++ b/gsl-1.9/interpolation/bsearch.c
@@ -0,0 +1,47 @@
+/* interpolation/bsearch.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_interp.h>
+
+#ifndef HIDE_INLINE_STATIC
+size_t
+gsl_interp_bsearch (
+  const double x_array[], double x,
+  size_t index_lo,
+  size_t index_hi
+  )
+{
+  size_t ilo = index_lo;
+  size_t ihi = index_hi;
+  while (ihi > ilo + 1)
+    {
+      size_t i = (ihi + ilo) / 2;
+      if (x_array[i] > x)
+        ihi = i;
+      else
+        ilo = i;
+    }
+
+  return ilo;
+}
+#endif