test.cpp

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/**
 * @file test.cpp
 *
 * Test library code
 */

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

#include <px4_platform_common/defines.h>

#include "test.hpp"

bool __EXPORT equal(float a, float b, float epsilon)
{
    float diff = fabsf(a - b);

    if (diff > epsilon) {
        printf("not equal ->\n\ta: %12.8f\n\tb: %12.8f\n", double(a), double(b));
        return false;

    } else { return true; }
}

bool __EXPORT greater_than(float a, float b)
{
    if (a > b) {
        return true;

    } else {
        printf("not a > b ->\n\ta: %12.8f\n\tb: %12.8f\n", double(a), double(b));
        return false;
    }
}

bool __EXPORT less_than(float a, float b)
{
    if (a < b) {
        return true;

    } else {
        printf("not a < b ->\n\ta: %12.8f\n\tb: %12.8f\n", double(a), double(b));
        return false;
    }
}

bool __EXPORT greater_than_or_equal(float a, float b)
{
    if (a >= b) {
        return true;

    } else {
        printf("not a >= b ->\n\ta: %12.8f\n\tb: %12.8f\n", double(a), double(b));
        return false;
    }
}

bool __EXPORT less_than_or_equal(float a, float b)
{
    if (a <= b) {
        return true;

    } else {
        printf("not a <= b ->\n\ta: %12.8f\n\tb: %12.8f\n", double(a), double(b));
        return false;
    }
}

void __EXPORT float2SigExp(
    const float &num,
    float &sig,
    int &exp)
{
// FIXME - This code makes no sense when exp is an int
// FIXME - isnan and isinf not defined for QuRT
#ifndef __PX4_QURT
    if (!PX4_ISFINITE(num)) {
        sig = 0.0f;
        exp = -99;
        return;
    }

    if (fabsf(num) < 1.0e-38f) {
        sig = 0;
        exp = 0;
        return;
    }

    exp = log10f(fabsf(num));

    if (exp > 0) {
        exp = ceil(exp);

    } else {
        exp = floor(exp);
    }

#endif

    sig = num;

    // cheap power since it is integer
    if (exp > 0) {
        for (int i = 0; i < abs(exp); i++) { sig /= 10; }

    } else {
        for (int i = 0; i < abs(exp); i++) { sig *= 10; }
    }
}