stdlib/bug-strtod.c

   1 /* Test to strtod etc for numbers like x000...0000.000e-nn.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2001-2021 Free Software Foundation, Inc.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "tst-strtod.h"
  25
  26 #define TEST_STRTOD(FSUF, FTYPE, FTOSTR, LSUF, CSUF)                    \
  27 static int                                                              \
  28 test_strto ## FSUF (void)                                               \
  29 {                                                                       \
  30   char buf[300];                                                        \
  31   int cnt;                                                              \
  32   int result = 0;                                                       \
  33                                                                         \
  34   for (cnt = 0; cnt < 200; ++cnt)                                       \
  35     {                                                                   \
  36       ssize_t n;                                                        \
  37       FTYPE f;                                                          \
  38                                                                         \
  39       n = sprintf (buf, "%d", cnt);                                     \
  40       memset (buf + n, '0', cnt);                                       \
  41       sprintf (buf + n + cnt, ".000e-%d", cnt);                         \
  42       f = strto ## FSUF (buf, NULL);                                    \
  43                                                                         \
  44       if (f != (FTYPE) cnt)                                             \
  45         {                                                               \
  46           char fstr[FSTRLENMAX];                                        \
  47           char fcntstr[FSTRLENMAX];                                     \
  48           FTOSTR (fstr, sizeof (fstr), "%g", f);                        \
  49           FTOSTR (fcntstr, sizeof (fstr), "%g", (FTYPE) cnt);           \
  50           printf ("strto" #FSUF "(\"%s\") "                             \
  51                   "failed for cnt == %d (%s instead of %s)\n",          \
  52                   buf, cnt, fstr, fcntstr);                             \
  53           result = 1;                                                   \
  54         }                                                               \
  55       else                                                              \
  56         printf ( "strto" #FSUF "() fine for cnt == %d\n", cnt);         \
  57     }                                                                   \
  58   return result;                                                        \
  59 }
  60
  61 GEN_TEST_STRTOD_FOREACH (TEST_STRTOD)
  62
  63 int
  64 main (void)
  65 {
  66   return STRTOD_TEST_FOREACH (test_strto);
  67 }