tests/test-c-dtoastr.c

   1 /* Test of c_dtoastr() function.
   2    Copyright (C) 2020-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include "ftoastr.h"
  20
  21 #include <locale.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "macros.h"
  26
  27 int
  28 main (int argc, char *argv[])
  29 {
  30   /* configure should already have checked that the locale is supported.  */
  31   if (setlocale (LC_ALL, "") == NULL)
  32     return 1;
  33
  34   /* Test behaviour of snprintf() as a "control group".
  35      (We should be running in a locale where ',' is the decimal point.) */
  36   {
  37     char s[16];
  38
  39     snprintf (s, sizeof s, "%#.0f", 1.0);
  40     if (!strcmp (s, "1."))
  41       {
  42         /* Skip the test, since we're not in a useful locale for testing. */
  43         return 77;
  44       }
  45     ASSERT (!strcmp (s, "1,"));
  46   }
  47
  48   /* Test behaviour of c_dtoastr().
  49      It should always use '.' as the decimal point. */
  50   {
  51     char buf[DBL_BUFSIZE_BOUND];
  52
  53     c_dtoastr (buf, sizeof buf, 0, 0, 0.1);
  54     ASSERT (!strcmp (buf, "0.1"));
  55   }
  56
  57   return test_exit_status;
  58 }