tests/test-c-vasnprintf.c

   1 /* Test of c_vasnprintf() function.
   2    Copyright (C) 2011-2025 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 "c-vasnprintf.h"
  20
  21 #include <locale.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "macros.h"
  26
  27 static char *
  28 my_c_asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
  29 {
  30   va_list args;
  31   char *ret;
  32
  33   va_start (args, format);
  34   ret = c_vasnprintf (resultbuf, lengthp, format, args);
  35   va_end (args);
  36   return ret;
  37 }
  38
  39 int
  40 main (int argc, char *argv[])
  41 {
  42   /* configure should already have checked that the locale is supported.  */
  43   if (setlocale (LC_ALL, "") == NULL)
  44     return 1;
  45
  46   /* Test behaviour of c_vasnprintf().
  47      It should always use '.' as the decimal point. */
  48   {
  49     char buf[16];
  50     size_t length = sizeof (buf);
  51     char *result = my_c_asnprintf (buf, &length, "%#.0f", 1.0);
  52     ASSERT (result == buf);
  53     ASSERT (strcmp (result, "1.") == 0);
  54   }
  55
  56   return test_exit_status;
  57 }