1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* Copyright (C) 1991, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
struct ltest
{
const char *str; /* Convert this. */
double expect; /* To get this. */
char left; /* With this left over. */
int err; /* And this in errno. */
};
static const struct ltest tests[] =
{
{ "12.345", 12.345, '\0', 0 },
{ "12.345e19", 12.345e19, '\0', 0 },
{ "-.1e+9", -.1e+9, '\0', 0 },
{ ".125", .125, '\0', 0 },
{ "1e20", 1e20, '\0', 0 },
{ "0e-19", 0, '\0', 0 },
{ "4\00012", 4.0, '\0', 0 },
{ "5.9e-76", 5.9e-76, '\0', 0 },
{ NULL, 0, '\0', 0 }
};
static void expand (char *dst, int c);
static int long_dbl (void);
int
main (int argc, char ** argv)
{
char buf[100];
register const struct ltest *lt;
char *ep;
int status = 0;
int save_errno;
for (lt = tests; lt->str != NULL; ++lt)
{
double d;
errno = 0;
d = strtod(lt->str, &ep);
save_errno = errno;
printf ("strtod (\"%s\") test %u",
lt->str, (unsigned int) (lt - tests));
if (d == lt->expect && *ep == lt->left && save_errno == lt->err)
puts ("\tOK");
else
{
puts ("\tBAD");
if (d != lt->expect)
printf (" returns %.60g, expected %.60g\n", d, lt->expect);
if (lt->left != *ep)
{
char exp1[5], exp2[5];
expand (exp1, *ep);
expand (exp2, lt->left);
printf (" leaves '%s', expected '%s'\n", exp1, exp2);
}
if (save_errno != lt->err)
printf (" errno %d (%s) instead of %d (%s)\n",
save_errno, strerror (save_errno),
lt->err, strerror (lt->err));
status = 1;
}
}
sprintf (buf, "%f", strtod ("-0.0", NULL));
if (strcmp (buf, "-0.000000") != 0)
{
printf (" strtod (\"-0.0\", NULL) returns \"%s\"\n", buf);
status = 1;
}
status |= long_dbl ();
exit (status ? EXIT_FAILURE : EXIT_SUCCESS);
}
static void
expand (dst, c)
char *dst;
register int c;
{
if (isprint (c))
{
dst[0] = c;
dst[1] = '\0';
}
else
(void) sprintf (dst, "%#.3o", (unsigned int) c);
}
static int
long_dbl (void)
{
/* Regenerate this string using
echo '(2^53-1)*2^(1024-53)' | bc | sed 's/\([^\]*\)\\*$/ "\1"/'
*/
static const char longestdbl[] =
"17976931348623157081452742373170435679807056752584499659891747680315"
"72607800285387605895586327668781715404589535143824642343213268894641"
"82768467546703537516986049910576551282076245490090389328944075868508"
"45513394230458323690322294816580855933212334827479782620414472316873"
"8177180919299881250404026184124858368";
double d = strtod (longestdbl, NULL);
printf ("strtod (\"%s\", NULL) = %g\n", longestdbl, d);
if (d != 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000)
return 1;
return 0;
}
|
