xref: /netbsd-src/external/bsd/ntp/dist/tests/libntp/hextolfp.c (revision cdfa2a7ef92791ba9db70a584a1d904730e6fb46)

/*	$NetBSD: hextolfp.c,v 1.2 2020/05/25 20:47:36 christos Exp $	*/

#include "config.h"

#include "ntp_stdlib.h"
#include "ntp_calendar.h"

#include "unity.h"
#include "lfptest.h"

void test_PositiveInteger(void);
void test_NegativeInteger(void);
void test_PositiveFraction(void);
void test_NegativeFraction(void);
void test_IllegalNumberOfInteger(void);
void test_IllegalChar(void);


void
test_PositiveInteger(void) {
	const char *str = "00001000.00000000";
	l_fp actual;

	l_fp expected = {{4096}, 0}; /* 16^3, no fraction part. */

	TEST_ASSERT_TRUE(hextolfp(str, &actual));
	TEST_ASSERT_TRUE(IsEqual(expected, actual));
}

void
test_NegativeInteger(void) {
	const char *str = "ffffffff.00000000"; /* -1 decimal */
	l_fp actual;

	l_fp expected = {{-1}, 0};

	TEST_ASSERT_TRUE(hextolfp(str, &actual));
	TEST_ASSERT_TRUE(IsEqual(expected, actual));
}

void
test_PositiveFraction(void) {
	const char *str = "00002000.80000000"; /* 8196.5 decimal */
	l_fp actual;

	l_fp expected = {{8192}, HALF};

	TEST_ASSERT_TRUE(hextolfp(str, &actual));
	TEST_ASSERT_TRUE(IsEqual(expected, actual));
}

void
test_NegativeFraction(void) {
	const char *str = "ffffffff.40000000"; /* -1 + 0.25 decimal */
	l_fp actual;

	l_fp expected = {{-1}, QUARTER}; /* -1 + 0.25 */

	TEST_ASSERT_TRUE(hextolfp(str, &actual));
	TEST_ASSERT_TRUE(IsEqual(expected, actual));
}

void
test_IllegalNumberOfInteger(void) {
	const char *str = "1000000.00000000"; /* Missing one digit in integral part. */
	l_fp actual;

	TEST_ASSERT_FALSE(hextolfp(str, &actual));
}

void
test_IllegalChar(void) {
	const char *str = "10000000.0000h000"; /* Illegal character h. */
	l_fp actual;

	TEST_ASSERT_FALSE(hextolfp(str, &actual));
}