1/* $NetBSD: t_tan.c,v 1.5 2014/03/03 10:39:08 martin Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <atf-c.h>
33#include <math.h>
34
35static const struct {
36	int		angle;
37	double		x;
38	double		y;
39} angles[] = {
40	{ -180, -3.141592653589793,  0.0000000000000000 },
41	{ -135, -2.356194490192345,  1.0000000000000000 },
42	{  -45, -0.785398163397448, -1.0000000000000000 },
43	{    0,  0.000000000000000,  0.0000000000000000 },
44	{   30,  0.523598775598299,  0.5773502691896258 },
45	{   45,  0.785398163397448,  1.0000000000000000 },
46	{   60,  1.047197551196598,  1.7320508075688773 },
47	{  120,  2.094395102393195, -1.7320508075688773 },
48	{  135,  2.356194490192345, -1.0000000000000000 },
49	{  150,  2.617993877991494, -0.5773502691896258 },
50	{  180,  3.141592653589793,  0.0000000000000000 },
51	{  360,  6.283185307179586,  0.0000000000000000 }
52};
53
54/*
55 * tan(3)
56 */
57ATF_TC(tan_angles);
58ATF_TC_HEAD(tan_angles, tc)
59{
60	atf_tc_set_md_var(tc, "descr", "Test some selected angles");
61}
62
63ATF_TC_BODY(tan_angles, tc)
64{
65	const double eps = 1.0e-14;
66	size_t i;
67
68	for (i = 0; i < __arraycount(angles); i++) {
69
70		if (fabs(tan(angles[i].x) - angles[i].y) > eps)
71			atf_tc_fail_nonfatal("tan(%d deg) != %0.01f",
72			    angles[i].angle, angles[i].y);
73	}
74}
75
76ATF_TC(tan_nan);
77ATF_TC_HEAD(tan_nan, tc)
78{
79	atf_tc_set_md_var(tc, "descr", "Test tan(NaN) == NaN");
80}
81
82ATF_TC_BODY(tan_nan, tc)
83{
84	const double x = 0.0L / 0.0L;
85
86	ATF_CHECK(isnan(x) != 0);
87	ATF_CHECK(isnan(tan(x)) != 0);
88}
89
90ATF_TC(tan_inf_neg);
91ATF_TC_HEAD(tan_inf_neg, tc)
92{
93	atf_tc_set_md_var(tc, "descr", "Test tan(-Inf) == NaN");
94}
95
96ATF_TC_BODY(tan_inf_neg, tc)
97{
98	const double x = -1.0L / 0.0L;
99
100	ATF_CHECK(isnan(tan(x)) != 0);
101}
102
103ATF_TC(tan_inf_pos);
104ATF_TC_HEAD(tan_inf_pos, tc)
105{
106	atf_tc_set_md_var(tc, "descr", "Test tan(+Inf) == NaN");
107}
108
109ATF_TC_BODY(tan_inf_pos, tc)
110{
111	const double x = 1.0L / 0.0L;
112
113	ATF_CHECK(isnan(tan(x)) != 0);
114}
115
116
117ATF_TC(tan_zero_neg);
118ATF_TC_HEAD(tan_zero_neg, tc)
119{
120	atf_tc_set_md_var(tc, "descr", "Test tan(-0.0) == -0.0");
121}
122
123ATF_TC_BODY(tan_zero_neg, tc)
124{
125	const double x = -0.0L;
126
127	ATF_CHECK(tan(x) == x);
128}
129
130ATF_TC(tan_zero_pos);
131ATF_TC_HEAD(tan_zero_pos, tc)
132{
133	atf_tc_set_md_var(tc, "descr", "Test tan(+0.0) == +0.0");
134}
135
136ATF_TC_BODY(tan_zero_pos, tc)
137{
138	const double x = 0.0L;
139
140	ATF_CHECK(tan(x) == x);
141}
142
143/*
144 * tanf(3)
145 */
146ATF_TC(tanf_angles);
147ATF_TC_HEAD(tanf_angles, tc)
148{
149	atf_tc_set_md_var(tc, "descr", "Test some selected angles");
150}
151
152ATF_TC_BODY(tanf_angles, tc)
153{
154	const float eps = 1.0e-6;
155	float x, y;
156	size_t i;
157
158	for (i = 0; i < __arraycount(angles); i++) {
159
160		x = angles[i].x;
161		y = angles[i].y;
162
163		if (fabsf(tanf(x) - y) > eps)
164			atf_tc_fail_nonfatal("tanf(%d deg) != %0.01f",
165			    angles[i].angle, angles[i].y);
166	}
167}
168
169ATF_TC(tanf_nan);
170ATF_TC_HEAD(tanf_nan, tc)
171{
172	atf_tc_set_md_var(tc, "descr", "Test tanf(NaN) == NaN");
173}
174
175ATF_TC_BODY(tanf_nan, tc)
176{
177	const float x = 0.0L / 0.0L;
178
179	ATF_CHECK(isnan(x) != 0);
180	ATF_CHECK(isnan(tanf(x)) != 0);
181}
182
183ATF_TC(tanf_inf_neg);
184ATF_TC_HEAD(tanf_inf_neg, tc)
185{
186	atf_tc_set_md_var(tc, "descr", "Test tanf(-Inf) == NaN");
187}
188
189ATF_TC_BODY(tanf_inf_neg, tc)
190{
191	const float x = -1.0L / 0.0L;
192
193	if (isnan(tanf(x)) == 0) {
194		atf_tc_expect_fail("PR lib/45362");
195		atf_tc_fail("tanf(-Inf) != NaN");
196	}
197}
198
199ATF_TC(tanf_inf_pos);
200ATF_TC_HEAD(tanf_inf_pos, tc)
201{
202	atf_tc_set_md_var(tc, "descr", "Test tanf(+Inf) == NaN");
203}
204
205ATF_TC_BODY(tanf_inf_pos, tc)
206{
207	const float x = 1.0L / 0.0L;
208
209	if (isnan(tanf(x)) == 0) {
210		atf_tc_expect_fail("PR lib/45362");
211		atf_tc_fail("tanf(+Inf) != NaN");
212	}
213}
214
215
216ATF_TC(tanf_zero_neg);
217ATF_TC_HEAD(tanf_zero_neg, tc)
218{
219	atf_tc_set_md_var(tc, "descr", "Test tanf(-0.0) == -0.0");
220}
221
222ATF_TC_BODY(tanf_zero_neg, tc)
223{
224	const float x = -0.0L;
225
226	ATF_CHECK(tanf(x) == x);
227}
228
229ATF_TC(tanf_zero_pos);
230ATF_TC_HEAD(tanf_zero_pos, tc)
231{
232	atf_tc_set_md_var(tc, "descr", "Test tanf(+0.0) == +0.0");
233}
234
235ATF_TC_BODY(tanf_zero_pos, tc)
236{
237	const float x = 0.0L;
238
239	ATF_CHECK(tanf(x) == x);
240}
241
242ATF_TP_ADD_TCS(tp)
243{
244
245	ATF_TP_ADD_TC(tp, tan_angles);
246	ATF_TP_ADD_TC(tp, tan_nan);
247	ATF_TP_ADD_TC(tp, tan_inf_neg);
248	ATF_TP_ADD_TC(tp, tan_inf_pos);
249	ATF_TP_ADD_TC(tp, tan_zero_neg);
250	ATF_TP_ADD_TC(tp, tan_zero_pos);
251
252	ATF_TP_ADD_TC(tp, tanf_angles);
253	ATF_TP_ADD_TC(tp, tanf_nan);
254	ATF_TP_ADD_TC(tp, tanf_inf_neg);
255	ATF_TP_ADD_TC(tp, tanf_inf_pos);
256	ATF_TP_ADD_TC(tp, tanf_zero_neg);
257	ATF_TP_ADD_TC(tp, tanf_zero_pos);
258
259	return atf_no_error();
260}
261