lfptostr.c revision 1.1.1.2 
1/*	$NetBSD: lfptostr.c,v 1.1.1.2 2015/07/10 13:11:14 christos Exp $	*/
2
3/*
4 * This file contains test for both mfptoa and mfptoms (which uses dolfptoa),
5 * since all these functions are very similar. It also tests ulfptoa, which is
6 * a macro.
7 */
8
9#include "config.h"
10#include "ntp_stdlib.h"
11#include "ntp_calendar.h"
12#include "ntp_fp.h"
13
14#include "unity.h"
15
16static const int LFP_MAX_PRECISION = 10;
17static const int LFP_MAX_PRECISION_MS = 7;
18
19static const int ONE_FOURTH = 1073741824; // (1 << 30)
20static const int HALF = (1 << 31);
21static const int THREE_FOURTH = -1073741824;
22static const int HALF_PROMILLE_UP = 2147484; // slightly more than 0.0005
23static const int HALF_PROMILLE_DOWN = 2147483; // slightly less than 0.0005
24
25void test_PositiveInteger(void) {
26	l_fp test = {200, 0}; // exact 200.0000000000
27
28	TEST_ASSERT_EQUAL_STRING("200.0000000000", mfptoa(test.l_ui, test.l_uf, LFP_MAX_PRECISION));
29	TEST_ASSERT_EQUAL_STRING("200000.0000000", mfptoms(test.l_ui, test.l_uf, LFP_MAX_PRECISION_MS));
30}
31
32void test_NegativeInteger(void) {
33	l_fp test = {-100, 0}; // -100
34
35	TEST_ASSERT_EQUAL_STRING("-100.0000000000", lfptoa(&test, LFP_MAX_PRECISION));
36	TEST_ASSERT_EQUAL_STRING("-100000.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
37}
38
39void test_PositiveIntegerWithFraction(void) {
40	l_fp test = {200, ONE_FOURTH}; // 200.25
41
42	TEST_ASSERT_EQUAL_STRING("200.2500000000", lfptoa(&test, LFP_MAX_PRECISION));
43	TEST_ASSERT_EQUAL_STRING("200250.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
44}
45
46void test_NegativeIntegerWithFraction(void) {
47	l_fp test = {-100, ONE_FOURTH}; // -99.75
48
49	TEST_ASSERT_EQUAL_STRING("-99.7500000000", lfptoa(&test, LFP_MAX_PRECISION));
50	TEST_ASSERT_EQUAL_STRING("-99750.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS));
51}
52
53void test_RoundingDownToInteger(void) {
54	l_fp test = {10, ONE_FOURTH}; // 10.25
55
56	TEST_ASSERT_EQUAL_STRING("10", lfptoa(&test, 0));
57	TEST_ASSERT_EQUAL_STRING("10250", lfptoms(&test, 0));
58}
59
60void test_RoundingMiddleToInteger(void) {
61	l_fp test = {10, HALF}; // 10.5
62
63	TEST_ASSERT_EQUAL_STRING("11", lfptoa(&test, 0));
64	TEST_ASSERT_EQUAL_STRING("10500", lfptoms(&test, 0));
65}
66
67void test_RoundingUpToInteger(void) {
68	l_fp test = {5, THREE_FOURTH}; // 5.75
69
70	TEST_ASSERT_EQUAL_STRING("6", lfptoa(&test, 0));
71	TEST_ASSERT_EQUAL_STRING("5750", lfptoms(&test, 0));
72}
73
74void test_SingleDecimal(void) {
75	l_fp test = {8, ONE_FOURTH}; // 8.25
76
77	TEST_ASSERT_EQUAL_STRING("8.3", lfptoa(&test, 1));
78	TEST_ASSERT_EQUAL_STRING("8250.0", lfptoms(&test, 1));
79}
80
81void test_MillisecondsRoundingUp(void) {
82	l_fp test = {1, HALF_PROMILLE_UP}; //slightly more than 1.0005
83
84	TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
85
86	TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
87	TEST_ASSERT_EQUAL_STRING("1001", lfptoms(&test, 0));
88}
89
90void test_MillisecondsRoundingDown(void) {
91	l_fp test = {1, HALF_PROMILLE_DOWN}; // slightly less than 1.0005
92
93	TEST_ASSERT_EQUAL_STRING("1.0", lfptoa(&test, 1));
94
95	TEST_ASSERT_EQUAL_STRING("1000.5", lfptoms(&test, 1));
96	TEST_ASSERT_EQUAL_STRING("1000", lfptoms(&test, 0));
97}
98
99void test_UnsignedInteger(void) {
100	l_fp test = {3000000000UL, 0};
101
102	TEST_ASSERT_EQUAL_STRING("3000000000.0", ulfptoa(&test, 1));
103}
104
105
106