From 50a7e81541b7b10a09df6cf5e85e8569ea3cec77 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Tue, 23 Feb 2021 16:09:02 +0530
Subject: Wrap gsl polynomial evaluation function.

* scm/extent-sampling/wrap.scm (polyval): New function.
---
 scm/extent-sampling/wrap.scm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scm/extent-sampling/wrap.scm b/scm/extent-sampling/wrap.scm
index 63d3d9e..65fd7ad 100644
--- a/scm/extent-sampling/wrap.scm
+++ b/scm/extent-sampling/wrap.scm
@@ -158,6 +158,16 @@
                       (dynamic-func "gsl_rstat_n" lib-extentsampling)
                       (list '*)))
 
+;; Polynomial functions
+
+(define-public (polyval coefficients x)
+  ((pointer->procedure double
+                       (dynamic-func "gsl_poly_eval" lib-gsl)
+                       (list '* int double))
+   (bytevector->pointer (list->typed-array 'f64 1 coefficients))
+   (length coefficients)
+   x))
+
 ;; nd-random
 
 (define-public (random-direction-vector dimension)
-- 
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