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
38 ATF_TC_WITHOUT_HEAD(ilogb);
ATF_TC_BODY(ilogb,tc)39 ATF_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
57 ATF_TC_WITHOUT_HEAD(ilogbf);
ATF_TC_BODY(ilogbf,tc)58 ATF_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
77 ATF_TC_WITHOUT_HEAD(ilogbl);
ATF_TC_BODY(ilogbl,tc)78 ATF_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
ATF_TP_ADD_TCS(tp)97 ATF_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