1 /*-
2 * Copyright (C) 2007 David Schultz <das@FreeBSD.org>
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 * $FreeBSD: src/tools/regression/lib/msun/test-nan.c,v 1.1 2007/12/16 21:19:51 das Exp $
27 */
28
29 /*
30 * Test for nan(), nanf(), and nanl(). We also test that strtod("nan(...)")
31 * and sscanf("nan(...)", ...) work identically.
32 */
33
34 #include <assert.h>
35 #include <fenv.h>
36 #include <float.h>
37 #include <locale.h>
38 #include <math.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42
43 void
testnan(const char * nan_format)44 testnan(const char *nan_format)
45 {
46 char nan_str[128];
47 char *end;
48 long double ald[4];
49 double ad[4];
50 float af[4];
51 int i;
52
53 snprintf(nan_str, sizeof(nan_str), "nan(%s)", nan_format);
54 for (i = 0; i < 4; i++) {
55 /*
56 * x86 has an 80-bit long double stored in 96 bits,
57 * so we need to initialize the memory for the memcmp()
58 * checks below to work.
59 */
60 bzero(&af[i], sizeof(float));
61 bzero(&ad[i], sizeof(double));
62 bzero(&ald[i], sizeof(long double));
63
64 }
65
66 af[0] = nanf(nan_format);
67 assert(isnan(af[0]));
68 af[1] = strtof(nan_str, &end);
69 assert(end == nan_str + strlen(nan_str));
70 assert(sscanf(nan_str, "%e", &af[2]) == 1);
71 assert(memcmp(&af[0], &af[1], sizeof(float)) == 0);
72 assert(memcmp(&af[1], &af[2], sizeof(float)) == 0);
73 if (*nan_format == '\0') {
74 /* nanf("") == strtof("nan") */
75 af[3] = strtof("nan", NULL);
76 assert(memcmp(&af[2], &af[3], sizeof(float)) == 0);
77 }
78
79 ad[0] = nan(nan_format);
80 assert(isnan(ad[0]));
81 ad[1] = strtod(nan_str, &end);
82 assert(end == nan_str + strlen(nan_str));
83 assert(sscanf(nan_str, "%le", &ad[2]) == 1);
84 assert(memcmp(&ad[0], &ad[1], sizeof(double)) == 0);
85 assert(memcmp(&ad[1], &ad[2], sizeof(double)) == 0);
86 if (*nan_format == '\0') {
87 /* nan("") == strtod("nan") */
88 ad[3] = strtod("nan", NULL);
89 assert(memcmp(&ad[2], &ad[3], sizeof(double)) == 0);
90 }
91
92 ald[0] = nanl(nan_format);
93 assert(isnan(ald[0]));
94 ald[1] = strtold(nan_str, &end);
95 assert(end == nan_str + strlen(nan_str));
96 assert(sscanf(nan_str, "%Le", &ald[2]) == 1);
97 assert(memcmp(&ald[0], &ald[1], sizeof(long double)) == 0);
98 assert(memcmp(&ald[1], &ald[2], sizeof(long double)) == 0);
99 if (*nan_format == '\0') {
100 /* nanl("") == strtold("nan") */
101 ald[3] = strtold("nan", NULL);
102 assert(memcmp(&ald[2], &ald[3], sizeof(long double)) == 0);
103 }
104 }
105
106 int
main(int argc,char * argv[])107 main(int argc, char *argv[])
108 {
109
110 printf("1..1\n");
111
112 /* Die if a signalling NaN is returned */
113 feenableexcept(FE_INVALID);
114
115 testnan("0x1234");
116 testnan("");
117
118 printf("ok 1 - nan\n");
119
120 return (0);
121 }
122