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/* -*- c++ -*- */
/*
* Copyright 2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <qa_fast_atan2f.h>
#include <gnuradio/math.h>
#include <cppunit/TestAssert.h>
#include <cmath>
#include <limits>
#ifdef _MSC_VER
#define ISNAN _isnan
#else
#define ISNAN std::isnan
#endif
void
qa_fast_atan2f::t1()
{
static const unsigned int N = 100;
float c_atan2;
float gr_atan2f;
for(float i = -N/2; i < N/2; i++) {
for(float j =-N/2; i < N/2; i++) {
float x = i/10.0;
float y = j/10.0;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(c_atan2, gr_atan2f, 0.0);
}
}
}
void
qa_fast_atan2f::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);
CPPUNIT_ASSERT_DOUBLES_EQUAL(c_atan2, gr_atan2f, 0.0);
x = -inf;
y = 0;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(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);
CPPUNIT_ASSERT_DOUBLES_EQUAL(c_atan2, gr_atan2f, 0.0);
x = 0;
y = -inf;
c_atan2 = atan2(y, x);
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(c_atan2, gr_atan2f, 0.0);
/* Test x and y as INF */
x = inf;
y = inf;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT(ISNAN(gr_atan2f));
/* Test x as NAN */
x = nan;
y = 0;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(0.0f, gr_atan2f, 0.0001);
x = -nan;
y = 0;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(0.0f, gr_atan2f, 0.0001);
/* Test y as NAN */
x = 0;
y = nan;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(0.0f, gr_atan2f, 0.0001);
x = 0;
y = -nan;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT_DOUBLES_EQUAL(0.0f, gr_atan2f, 0.0001);
/* Test mixed NAN and INF */
x = inf;
y = nan;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT(ISNAN(gr_atan2f));
x = nan;
y = inf;
gr_atan2f = gr::fast_atan2f(y, x);
CPPUNIT_ASSERT(ISNAN(gr_atan2f));
}
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