From 07b85b6dcc6e84f42da3579b65692a3d4ba04e38 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Thu, 12 Mar 2020 11:44:43 -0700
Subject: uhd: math: Add linear_interp()

This lets you linearly interpolate between two points.
---
 host/tests/math_test.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'host/tests')

diff --git a/host/tests/math_test.cpp b/host/tests/math_test.cpp
index 4714f6625..bff6fc16f 100644
--- a/host/tests/math_test.cpp
+++ b/host/tests/math_test.cpp
@@ -6,7 +6,6 @@
 //
 
 #include <uhd/utils/math.hpp>
-#include <stdint.h>
 #include <boost/test/unit_test.hpp>
 
 BOOST_AUTO_TEST_CASE(test_lcm)
@@ -18,3 +17,13 @@ BOOST_AUTO_TEST_CASE(test_gcd)
 {
     BOOST_CHECK_EQUAL(uhd::math::gcd<int>(6, 15), 3);
 }
+
+BOOST_AUTO_TEST_CASE(test_interp)
+{
+    const double x0 = 1.0, x1 = 2.0;
+    const double y0 = 2.0, y1 = 4.0;
+    const double x     = 1.5;
+    const double y_exp = 3.0;
+
+    BOOST_CHECK_EQUAL(uhd::math::linear_interp<double>(x, x0, y0, x1, y1), y_exp);
+}
-- 
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