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) 2001-2023 Free Software Foundation, Inc.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "tst-strtod.h"
  24
  25 #define TEST_STRTOD(FSUF, FTYPE, FTOSTR, LSUF, CSUF)                    \
  26 static int                                                              \
  27 test_strto ## FSUF (void)                                               \
  28 {                                                                       \
  29   char buf[300];                                                        \
  30   int cnt;                                                              \
  31   int result = 0;                                                       \
  32                                                                         \
  33   for (cnt = 0; cnt < 200; ++cnt)                                       \
  34     {                                                                   \
  35       ssize_t n;                                                        \
  36       FTYPE f;                                                          \
  37                                                                         \
  38       n = sprintf (buf, "%d", cnt);                                     \
  39       memset (buf + n, '0', cnt);                                       \
  40       sprintf (buf + n + cnt, ".000e-%d", cnt);                         \
  41       f = strto ## FSUF (buf, NULL);                                    \
  42                                                                         \
  43       if (f != (FTYPE) cnt)                                             \
  44         {                                                               \
  45           char fstr[FSTRLENMAX];                                        \
  46           char fcntstr[FSTRLENMAX];                                     \
  47           FTOSTR (fstr, sizeof (fstr), "%g", f);                        \
  48           FTOSTR (fcntstr, sizeof (fstr), "%g", (FTYPE) cnt);           \
  49           printf ("strto" #FSUF "(\"%s\") "                             \
  50                   "failed for cnt == %d (%s instead of %s)\n",          \
  51                   buf, cnt, fstr, fcntstr);                             \
  52           result = 1;                                                   \
  53         }                                                               \
  54       else                                                              \
  55         printf ( "strto" #FSUF "() fine for cnt == %d\n", cnt);         \
  56     }                                                                   \
  57   return result;                                                        \
  58 }
  59
  60 GEN_TEST_STRTOD_FOREACH (TEST_STRTOD)
  61
  62 int
  63 main (void)
  64 {
  65   return STRTOD_TEST_FOREACH (test_strto);
  66 }