From e2bce25ab0f7eb0065812ebdc4f251206b86b446 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Tue, 23 Feb 2021 16:38:41 +0530
Subject: Wrap volume function.

* scm/extent-sampling/wrap.scm (maybe-procedure->extent-oracle,
maybe-procedure->integrand): New functions.
---
 scm/extent-sampling/wrap.scm | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/scm/extent-sampling/wrap.scm b/scm/extent-sampling/wrap.scm
index 25b9970..6bf0972 100644
--- a/scm/extent-sampling/wrap.scm
+++ b/scm/extent-sampling/wrap.scm
@@ -311,3 +311,25 @@
   (make-integrand (dynamic-func "x_coordinate_integrand" lib-extentsampling)
                   %null-pointer))
 
+;; extent-sampling
+
+(define maybe-procedure->extent-oracle
+  (match-lambda
+    ((? procedure? proc)
+     (make-extent-oracle
+      (procedure->pointer double
+                          (lambda (r x params)
+                            (proc r x))
+                          (list '* '* '*))
+      %null-pointer))
+    (extent-oracle extent-oracle)))
+
+(define-public (volume extent-oracle true-volume dimension rtol)
+  (let ((stats (rstat-alloc)))
+    ((pointer->procedure double
+                         (dynamic-func "volume" lib-extentsampling)
+                         (list '* double '* unsigned-int double '*))
+     (maybe-procedure->extent-oracle extent-oracle)
+     true-volume %gsl-random-state dimension rtol stats)
+    (rstat-n stats)))
+
-- 
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