#include "config.h"
#include "ntp_types.h"
#include "ntp_stdlib.h"

#include "lfptest.h"

#include "ntp_unixtime.h"

#include "unity.h"

/* Required for Solaris. */
#include <math.h>

void test_ZeroBuffer(void);
void test_IntegerAndFractionalBuffer(void);
void test_IllegalMicroseconds(void);
void test_AlwaysFalseOnWindows(void);


void
test_ZeroBuffer(void)
{
#ifndef SYS_WINNT
	const struct timeval input = {0, 0};
	const l_fp expected = {{0 + JAN_1970}, 0};

	l_fp actual;

	TEST_ASSERT_TRUE(buftvtots((const char*)(&input), &actual));
	TEST_ASSERT_TRUE(IsEqual(expected, actual));
#else
	TEST_IGNORE_MESSAGE("Test only for Windows, skipping...");
#endif

	return;
}


void
test_IntegerAndFractionalBuffer(void)
{
#ifndef SYS_WINNT
	const struct timeval input = {5, 500000}; /* 5.5 */
	const l_fp expected = {{5 + JAN_1970}, HALF};
	double expectedDouble, actualDouble;
	l_fp actual;

	TEST_ASSERT_TRUE(buftvtots((const char*)(&input), &actual));

	/* Compare the fractional part with an absolute error given. */
	TEST_ASSERT_EQUAL(expected.l_ui, actual.l_ui);

	M_LFPTOD(0, expected.l_uf, expectedDouble);
	M_LFPTOD(0, actual.l_uf, actualDouble);

	/* The error should be less than 0.5 us */
	TEST_ASSERT_DOUBLE_WITHIN(0.0000005, expectedDouble, actualDouble);
#else
	TEST_IGNORE_MESSAGE("Test only for Windows, skipping...");
#endif

	return;
}

void
test_IllegalMicroseconds(void)
{
#ifndef SYS_WINNT
	const struct timeval input = {0, 1100000}; /* > 999 999 microseconds. */

	l_fp actual;

	TEST_ASSERT_FALSE(buftvtots((const char*)(&input), &actual));
#else
	TEST_IGNORE_MESSAGE("Test only for Windows, skipping...");
#endif

	return;
}


void
test_AlwaysFalseOnWindows(void)
{
#ifdef SYS_WINNT
	/*
	 * Under Windows, buftvtots will just return
	 * 0 (false).
	 */
	l_fp actual;
	TEST_ASSERT_FALSE(buftvtots("", &actual));
#else
	TEST_IGNORE_MESSAGE("Non-Windows test, skipping...");
#endif

	return;
}