stdlib/tst-strtod.c

   1 /* Copyright (C) 1991,96,97,98,99,2000,2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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.
   8
   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.
  13
  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.  */
  18
  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>
  26
  27 struct ltest
  28   {
  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.  */
  33   };
  34 static const struct ltest tests[] =
  35   {
  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 }
  68   };
  69
  70 static void expand (char *dst, int c);
  71 static int long_dbl (void);
  72 static int locale_test (void);
  73
  74 int
  75 main (int argc, char ** argv)
  76 {
  77   char buf[100];
  78   register const struct ltest *lt;
  79   char *ep;
  80   int status = 0;
  81   int save_errno;
  82
  83   for (lt = tests; lt->str != NULL; ++lt)
  84     {
  85       double d;
  86
  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
  95         {
  96           puts ("\tBAD");
  97           if (d != lt->expect)
  98             printf ("  returns %.60g, expected %.60g\n", d, lt->expect);
  99           if (lt->left != *ep)
 100             {
 101               char exp1[5], exp2[5];
 102               expand (exp1, *ep);
 103               expand (exp2, lt->left);
 104               printf ("  leaves '%s', expected '%s'\n", exp1, exp2);
 105             }
 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;
 111         }
 112     }
 113
 114   sprintf (buf, "%f", strtod ("-0.0", NULL));
 115   if (strcmp (buf, "-0.000000") != 0)
 116     {
 117       printf ("  strtod (\"-0.0\", NULL) returns \"%s\"\n", buf);
 118       status = 1;
 119     }
 120
 121   status |= long_dbl ();
 122
 123   status |= locale_test ();
 124
 125   return status ? EXIT_FAILURE : EXIT_SUCCESS;
 126 }
 127
 128 static void
 129 expand (dst, c)
 130      char *dst;
 131      register int c;
 132 {
 133   if (isprint (c))
 134     {
 135       dst[0] = c;
 136       dst[1] = '\0';
 137     }
 138   else
 139     (void) sprintf (dst, "%#.3o", (unsigned int) c);
 140 }
 141
 142 static int
 143 long_dbl (void)
 144 {
 145   /* Regenerate this string using
 146
 147      echo '(2^53-1)*2^(1024-53)' | bc | sed 's/\([^\]*\)\\*$/    "\1"/'
 148
 149   */
 150   static const char longestdbl[] =
 151     "17976931348623157081452742373170435679807056752584499659891747680315"
 152     "72607800285387605895586327668781715404589535143824642343213268894641"
 153     "82768467546703537516986049910576551282076245490090389328944075868508"
 154     "45513394230458323690322294816580855933212334827479782620414472316873"
 155     "8177180919299881250404026184124858368";
 156   double d = strtod (longestdbl, NULL);
 157
 158   printf ("strtod (\"%s\", NULL) = %g\n", longestdbl, d);
 159
 160   if (d != 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000)
 161     return 1;
 162
 163   return 0;
 164 }
 165
 166 /* Perform a few tests in a locale with thousands separators.  */
 167 static int
 168 locale_test (void)
 169 {
 170   static const struct
 171   {
 172     const char *loc;
 173     const char *str;
 174     double exp;
 175     ptrdiff_t nread;
 176   } tests[] =
 177     {
 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 }
 182     };
 183 #define ntests (sizeof (tests) / sizeof (tests[0]))
 184   size_t n;
 185   int result = 0;
 186
 187   puts ("\nLocale tests");
 188
 189   for (n = 0; n < ntests; ++n)
 190     {
 191       double d;
 192       char *endp;
 193
 194       if (setlocale (LC_ALL, tests[n].loc) == NULL)
 195         {
 196           printf ("cannot set locale %s\n", tests[n].loc);
 197           result = 1;
 198           continue;
 199         }
 200
 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)
 205         {
 206           printf ("strtod(\"%s\") returns %g and not %g\n",
 207                   tests[n].str, d, tests[n].exp);
 208           result = 1;
 209         }
 210       else if (endp - tests[n].str != tests[n].nread)
 211         {
 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;
 215         }
 216     }
 217
 218   if (result == 0)
 219     puts ("all OK");
 220
 221   return result;
 222 }