gpsd/tests/test_trig.c

/*
 * Copyright 2006 Chris Kuethe <chris.kuethe@gmail.com>
 * Copyright 2009 BBN Technologies (Greg Troxel)
 *
 * This file is Copyright 2005 by the GPSD project
 * SPDX-License-Identifier: BSD-2-clause
 */

/*
 * This program provides a way to check sin/cos.
 */

#include <stdio.h>
#include <math.h>

int test_trig(void);

int main(void) {
        test_trig();

        /* For now, no evaluation. */
        return 0;
}

#define Deg2Rad(x) ((x) * (2 * M_PI / 360.0))

int test_trig(void) {
        int i;
        double arg;
        double res;

        for (i = 0; i <= 360; i++) {
                arg = Deg2Rad(i);
                res = sin(arg);
                printf("sin(%.30f) = %.30f\n", arg, res);
        }

        for (i = 0; i <= 360; i++) {
                arg = Deg2Rad(i);
                res = cos(arg);
                printf("cos(%.30f) = %.30f\n", arg, res);
        }

        /* Always claim success. */
        return 0;
}
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