aboutsummaryrefslogtreecommitdiff
path: root/stdlib/tst-strtod.c
blob: c30eb1ee12bda188e903b94a363c02a232ee312e (plain)
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/* Copyright (C) 1991,1996-2001,2003,2009 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <ctype.h>
#include <locale.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <math.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 },
    { "0x1.4p+3", 10.0, '\0', 0 },
    { "0xAp0", 10.0, '\0', 0 },
    { "0x0Ap0", 10.0, '\0', 0 },
    { "0x0A", 10.0, '\0', 0 },
    { "0xA0", 160.0, '\0', 0 },
    { "0x0.A0p8", 160.0, '\0', 0 },
    { "0x0.50p9", 160.0, '\0', 0 },
    { "0x0.28p10", 160.0, '\0', 0 },
    { "0x0.14p11", 160.0, '\0', 0 },
    { "0x0.0A0p12", 160.0, '\0', 0 },
    { "0x0.050p13", 160.0, '\0', 0 },
    { "0x0.028p14", 160.0, '\0', 0 },
    { "0x0.014p15", 160.0, '\0', 0 },
    { "0x00.00A0p16", 160.0, '\0', 0 },
    { "0x00.0050p17", 160.0, '\0', 0 },
    { "0x00.0028p18", 160.0, '\0', 0 },
    { "0x00.0014p19", 160.0, '\0', 0 },
    { "0x1p-1023",
      1.11253692925360069154511635866620203210960799023116591527666e-308,
      '\0', ERANGE },
    { "0x0.8p-1022",
      1.11253692925360069154511635866620203210960799023116591527666e-308,
      '\0', ERANGE },
#if __GNUC_PREREQ(2,96)
    /* For older GCC release HUGE_VAL is not a constant.  */
    { "Inf", HUGE_VAL, '\0', 0 },
    { "-Inf", -HUGE_VAL, '\0', 0 },
    { "+InFiNiTy", HUGE_VAL, '\0', 0 },
#endif
    { "0x80000Ap-23", 0x80000Ap-23, '\0', 0 },
    { NULL, 0, '\0', 0 }
  };

static void expand (char *dst, int c);
static int long_dbl (void);
static int locale_test (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;
    }

  const char input[] = "3752432815e-39";

  float f1 = strtold (input, NULL);
  float f2;
  float f3 = strtof (input, NULL);
  sscanf (input, "%g", &f2);

  if (f1 != f2)
    {
      printf ("f1 = %a != f2 = %a\n", f1, f2);
      status = 1;
    }
  if (f1 != f3)
    {
      printf ("f1 = %a != f3 = %a\n", f1, f3);
      status = 1;
    }
  if (f2 != f3)
    {
      printf ("f2 = %a != f3 = %a\n", f2, f3);
      status = 1;
    }

  const char input2[] = "+1.000000000116415321826934814453125";
  if (strtold (input2, NULL) != +1.000000000116415321826934814453125L)
    {
      printf ("input2: %La != %La\n", strtold (input2, NULL),
	      +1.000000000116415321826934814453125L);
      status = 1;
    }

  static struct { const char *str; long double l; } ltests[] =
    {
      { "42.0000000000000000001", 42.0000000000000000001L },
      { "42.00000000000000000001", 42.00000000000000000001L },
      { "42.000000000000000000001", 42.000000000000000000001L }
    };
  int n;
  for (n = 0; n < sizeof (ltests) / sizeof (ltests[0]); ++n)
    if (strtold (ltests[n].str, NULL) != ltests[n].l)
      {
	printf ("ltests[%d]: %La != %La\n", n,
		strtold (ltests[n].str, NULL), ltests[n].l);
	status = 1;
      }

  status |= long_dbl ();

  status |= locale_test ();

  return 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;
}

/* Perform a few tests in a locale with thousands separators.  */
static int
locale_test (void)
{
  static const struct
  {
    const char *loc;
    const char *str;
    double exp;
    ptrdiff_t nread;
  } tests[] =
    {
      { "de_DE.UTF-8", "1,5", 1.5, 3 },
      { "de_DE.UTF-8", "1.5", 1.0, 1 },
      { "de_DE.UTF-8", "1.500", 1500.0, 5 },
      { "de_DE.UTF-8", "36.893.488.147.419.103.232", 0x1.0p65, 26 }
    };
#define ntests (sizeof (tests) / sizeof (tests[0]))
  size_t n;
  int result = 0;

  puts ("\nLocale tests");

  for (n = 0; n < ntests; ++n)
    {
      double d;
      char *endp;

      if (setlocale (LC_ALL, tests[n].loc) == NULL)
	{
	  printf ("cannot set locale %s\n", tests[n].loc);
	  result = 1;
	  continue;
	}

      /* We call __strtod_interal here instead of strtod to tests the
	 handling of grouping.  */
      d = __strtod_internal (tests[n].str, &endp, 1);
      if (d != tests[n].exp)
	{
	  printf ("strtod(\"%s\") returns %g and not %g\n",
		  tests[n].str, d, tests[n].exp);
	  result = 1;
	}
      else if (endp - tests[n].str != tests[n].nread)
	{
	  printf ("strtod(\"%s\") read %td bytes and not %td\n",
		  tests[n].str, endp - tests[n].str, tests[n].nread);
	  result = 1;
	}
    }

  if (result == 0)
    puts ("all OK");

  return result;
}