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/* -*- c++ -*- */
/*
* Copyright 2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gnuradio/math.h>
#include <boost/test/unit_test.hpp>
#include <cmath>
#include <limits>
#ifdef _MSC_VER
#define ISNAN _isnan
#else
#define ISNAN std::isnan
#endif
BOOST_AUTO_TEST_CASE(t1)
{
static const int N = 100;
float c_atan2;
float gr_atan2f;
for (float i = -N / 2; i < N / 2; i++) {
for (float j = -N / 2; j < N / 2; j++) {
float x = i / 10.0;
float y = j / 10.0;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(c_atan2, gr_atan2f, 0.001);
}
}
}
BOOST_AUTO_TEST_CASE(t2)
{
float c_atan2;
float gr_atan2f;
float x, y;
float inf = std::numeric_limits<float>::infinity();
float nan = std::numeric_limits<float>::quiet_NaN();
/* Test x as INF */
x = inf;
y = 0;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(c_atan2, gr_atan2f, 0.0);
x = -inf;
y = 0;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(c_atan2, gr_atan2f, 0.0);
/* Test y as INF */
x = 0;
y = inf;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(c_atan2, gr_atan2f, 0.0);
x = 0;
y = -inf;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(c_atan2, gr_atan2f, 0.0);
/* Test x and y as INF */
x = inf;
y = inf;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK(ISNAN(gr_atan2f));
/* Test x as NAN */
x = nan;
y = 0;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(0.0f, gr_atan2f, 0.0001);
x = -nan;
y = 0;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(0.0f, gr_atan2f, 0.0001);
/* Test y as NAN */
x = 0;
y = nan;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(0.0f, gr_atan2f, 0.0001);
x = 0;
y = -nan;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK_CLOSE(0.0f, gr_atan2f, 0.0001);
/* Test mixed NAN and INF */
x = inf;
y = nan;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK(ISNAN(gr_atan2f));
x = nan;
y = inf;
gr_atan2f = gr::fast_atan2f(y, x);
BOOST_CHECK(ISNAN(gr_atan2f));
}
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