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