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[glibc.git] / stdlib / tst-strtod.c
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1 /* Copyright (C) 1991,96,97,98,99,2000,2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <ctype.h>
20 #include <locale.h>
21 #include <stddef.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <string.h>
27 struct ltest
29 const char *str; /* Convert this. */
30 double expect; /* To get this. */
31 char left; /* With this left over. */
32 int err; /* And this in errno. */
34 static const struct ltest tests[] =
36 { "12.345", 12.345, '\0', 0 },
37 { "12.345e19", 12.345e19, '\0', 0 },
38 { "-.1e+9", -.1e+9, '\0', 0 },
39 { ".125", .125, '\0', 0 },
40 { "1e20", 1e20, '\0', 0 },
41 { "0e-19", 0, '\0', 0 },
42 { "4\00012", 4.0, '\0', 0 },
43 { "5.9e-76", 5.9e-76, '\0', 0 },
44 { "0x1.4p+3", 10.0, '\0', 0 },
45 { "0xAp0", 10.0, '\0', 0 },
46 { "0x0Ap0", 10.0, '\0', 0 },
47 { "0x0A", 10.0, '\0', 0 },
48 { "0xA0", 160.0, '\0', 0 },
49 { "0x0.A0p8", 160.0, '\0', 0 },
50 { "0x0.50p9", 160.0, '\0', 0 },
51 { "0x0.28p10", 160.0, '\0', 0 },
52 { "0x0.14p11", 160.0, '\0', 0 },
53 { "0x0.0A0p12", 160.0, '\0', 0 },
54 { "0x0.050p13", 160.0, '\0', 0 },
55 { "0x0.028p14", 160.0, '\0', 0 },
56 { "0x0.014p15", 160.0, '\0', 0 },
57 { "0x00.00A0p16", 160.0, '\0', 0 },
58 { "0x00.0050p17", 160.0, '\0', 0 },
59 { "0x00.0028p18", 160.0, '\0', 0 },
60 { "0x00.0014p19", 160.0, '\0', 0 },
61 { "0x1p-1023",
62 1.11253692925360069154511635866620203210960799023116591527666e-308,
63 '\0', 0 },
64 { "0x0.8p-1022",
65 1.11253692925360069154511635866620203210960799023116591527666e-308,
66 '\0', 0 },
67 { NULL, 0, '\0', 0 }
70 static void expand (char *dst, int c);
71 static int long_dbl (void);
72 static int locale_test (void);
74 int
75 main (int argc, char ** argv)
77 char buf[100];
78 register const struct ltest *lt;
79 char *ep;
80 int status = 0;
81 int save_errno;
83 for (lt = tests; lt->str != NULL; ++lt)
85 double d;
87 errno = 0;
88 d = strtod(lt->str, &ep);
89 save_errno = errno;
90 printf ("strtod (\"%s\") test %u",
91 lt->str, (unsigned int) (lt - tests));
92 if (d == lt->expect && *ep == lt->left && save_errno == lt->err)
93 puts ("\tOK");
94 else
96 puts ("\tBAD");
97 if (d != lt->expect)
98 printf (" returns %.60g, expected %.60g\n", d, lt->expect);
99 if (lt->left != *ep)
101 char exp1[5], exp2[5];
102 expand (exp1, *ep);
103 expand (exp2, lt->left);
104 printf (" leaves '%s', expected '%s'\n", exp1, exp2);
106 if (save_errno != lt->err)
107 printf (" errno %d (%s) instead of %d (%s)\n",
108 save_errno, strerror (save_errno),
109 lt->err, strerror (lt->err));
110 status = 1;
114 sprintf (buf, "%f", strtod ("-0.0", NULL));
115 if (strcmp (buf, "-0.000000") != 0)
117 printf (" strtod (\"-0.0\", NULL) returns \"%s\"\n", buf);
118 status = 1;
121 status |= long_dbl ();
123 status |= locale_test ();
125 return status ? EXIT_FAILURE : EXIT_SUCCESS;
128 static void
129 expand (dst, c)
130 char *dst;
131 register int c;
133 if (isprint (c))
135 dst[0] = c;
136 dst[1] = '\0';
138 else
139 (void) sprintf (dst, "%#.3o", (unsigned int) c);
142 static int
143 long_dbl (void)
145 /* Regenerate this string using
147 echo '(2^53-1)*2^(1024-53)' | bc | sed 's/\([^\]*\)\\*$/ "\1"/'
150 static const char longestdbl[] =
151 "17976931348623157081452742373170435679807056752584499659891747680315"
152 "72607800285387605895586327668781715404589535143824642343213268894641"
153 "82768467546703537516986049910576551282076245490090389328944075868508"
154 "45513394230458323690322294816580855933212334827479782620414472316873"
155 "8177180919299881250404026184124858368";
156 double d = strtod (longestdbl, NULL);
158 printf ("strtod (\"%s\", NULL) = %g\n", longestdbl, d);
160 if (d != 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000)
161 return 1;
163 return 0;
166 /* Perform a few tests in a locale with thousands separators. */
167 static int
168 locale_test (void)
170 static const struct
172 const char *loc;
173 const char *str;
174 double exp;
175 ptrdiff_t nread;
176 } tests[] =
178 { "de_DE.UTF-8", "1,5", 1.5, 3 },
179 { "de_DE.UTF-8", "1.5", 1.0, 1 },
180 { "de_DE.UTF-8", "1.500", 1500.0, 5 },
181 { "de_DE.UTF-8", "36.893.488.147.419.103.232", 0x1.0p65, 26 }
183 #define ntests (sizeof (tests) / sizeof (tests[0]))
184 size_t n;
185 int result = 0;
187 puts ("\nLocale tests");
189 for (n = 0; n < ntests; ++n)
191 double d;
192 char *endp;
194 if (setlocale (LC_ALL, tests[n].loc) == NULL)
196 printf ("cannot set locale %s\n", tests[n].loc);
197 result = 1;
198 continue;
201 /* We call __strtod_interal here instead of strtod to tests the
202 handling of grouping. */
203 d = __strtod_internal (tests[n].str, &endp, 1);
204 if (d != tests[n].exp)
206 printf ("strtod(\"%s\") returns %g and not %g\n",
207 tests[n].str, d, tests[n].exp);
208 result = 1;
210 else if (endp - tests[n].str != tests[n].nread)
212 printf ("strtod(\"%s\") read %td bytes and not %td\n",
213 tests[n].str, endp - tests[n].str, tests[n].nread);
214 result = 1;
218 if (result == 0)
219 puts ("all OK");
221 return result;