1/*	$OpenBSD: ilogb_test.c,v 1.2 2021/10/22 18:00:22 mbuhl Exp $	*/
2/*-
3 * Copyright (c) 2004 Stefan Farfeleder
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/lib/msun/tests/ilogb_test.c 292328 2015-12-16 09:11:11Z ngie $
28 */
29
30#include <float.h>
31#include <limits.h>
32#include <math.h>
33#include <stdio.h>
34#include <stdlib.h>
35
36#include "test-utils.h"
37
38ATF_TC_WITHOUT_HEAD(ilogb);
39ATF_TC_BODY(ilogb, tc)
40{
41	char buf[128], *end;
42	double d;
43	int e, i;
44
45	ATF_CHECK_EQ(FP_ILOGB0, ilogb(0));
46	ATF_CHECK_EQ(FP_ILOGBNAN, ilogb(NAN));
47	ATF_CHECK_EQ(INT_MAX, ilogb(INFINITY));
48	for (e = DBL_MIN_EXP - DBL_MANT_DIG; e < DBL_MAX_EXP; e++) {
49		snprintf(buf, sizeof(buf), "0x1.p%d", e);
50		d = strtod(buf, &end);
51		ATF_CHECK_EQ('\0', *end);
52		i = ilogb(d);
53		ATF_CHECK_EQ_MSG(e, i, "ilogb(%g) returned %d not %d", d, i, e);
54	}
55}
56
57ATF_TC_WITHOUT_HEAD(ilogbf);
58ATF_TC_BODY(ilogbf, tc)
59{
60	char buf[128], *end;
61	float f;
62	int e, i;
63
64	ATF_CHECK_EQ(FP_ILOGB0, ilogbf(0));
65	ATF_CHECK_EQ(FP_ILOGBNAN, ilogbf(NAN));
66	ATF_CHECK_EQ(INT_MAX, ilogbf(INFINITY));
67	for (e = FLT_MIN_EXP - FLT_MANT_DIG; e < FLT_MAX_EXP; e++) {
68		snprintf(buf, sizeof(buf), "0x1.p%d", e);
69		f = strtof(buf, &end);
70		ATF_CHECK_EQ('\0', *end);
71		i = ilogbf(f);
72		ATF_CHECK_EQ_MSG(e, i, "ilogbf(%g) returned %d not %d", f, i,
73		    e);
74	}
75}
76
77ATF_TC_WITHOUT_HEAD(ilogbl);
78ATF_TC_BODY(ilogbl, tc)
79{
80	char buf[128], *end;
81	long double ld;
82	int e, i;
83
84	ATF_CHECK_EQ(FP_ILOGB0, ilogbl(0));
85	ATF_CHECK_EQ(FP_ILOGBNAN, ilogbl(NAN));
86	ATF_CHECK_EQ(INT_MAX, ilogbl(INFINITY));
87	for (e = LDBL_MIN_EXP - LDBL_MANT_DIG; e < LDBL_MAX_EXP; e++) {
88		snprintf(buf, sizeof(buf), "0x1.p%d", e);
89		ld = strtold(buf, &end);
90		ATF_CHECK_EQ('\0', *end);
91		i = ilogbl(ld);
92		ATF_CHECK_EQ_MSG(e, i, "ilogbl(%Lg) returned %d not %d", ld, i,
93		    e);
94	}
95}
96
97ATF_TP_ADD_TCS(tp)
98{
99	ATF_TP_ADD_TC(tp, ilogb);
100	ATF_TP_ADD_TC(tp, ilogbf);
101	ATF_TP_ADD_TC(tp, ilogbl);
102
103	return (atf_no_error());
104}
105