/* Test of isblank() function.

   Copyright (C) 2009-2019 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */

#include <config.h>

#include <ctype.h>

#include "signature.h"

SIGNATURE_CHECK (isblank, int, (int));

#include <limits.h>

#include <stdio.h>

#include "macros.h"

int

main (int argc, char *argv[])

{

  unsigned int c;

  /* Verify the property in the "C" locale.

     POSIX specifies in

       <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>

     that

       - in all locales, the blank characters include the <space> and <tab>

         characters,

       - in the "POSIX" locale (which is usually the same as the "C" locale),

         the blank characters include only the ASCII <space> and <tab>

         characters.  */

  for (c = 0; c <= UCHAR_MAX; c++)

    ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));

  ASSERT (!isblank (EOF));

  return 0;

}