test.cpp 3.43 KB
/****************************************************************************
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 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
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 *    distribution.
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 *    used to endorse or promote products derived from this software
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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; }
	}
}