1  /* Test of setting the current locale.
       2     Copyright (C) 2011-2021 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 <locale.h>
      20  
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <string.h>
      24  
      25  int
      26  main ()
      27  {
      28    /* Try to set the locale by implicitly looking at the LC_ALL environment
      29       variable.  */
      30    if (setlocale (LC_ALL, "") != NULL)
      31      /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
      32      if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
      33        {
      34          fprintf (stderr, "setlocale did not fail for implicit %s\n",
      35                   getenv ("LC_ALL"));
      36          return 1;
      37        }
      38  
      39    /* Reset the locale.  */
      40    if (setlocale (LC_ALL, "C") == NULL)
      41      return 1;
      42  
      43    /* Try to set the locale by explicitly looking at the LC_ALL environment
      44       variable.  */
      45    if (setlocale (LC_ALL, getenv ("LC_ALL")) != NULL)
      46      /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
      47      if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
      48        {
      49          fprintf (stderr, "setlocale did not fail for explicit %s\n",
      50                   getenv ("LC_ALL"));
      51          return 1;
      52        }
      53  
      54    return 0;
      55  }