/* Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

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

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>

#include <stdlib.h>

#include <wctype.h>

int

main (int argc, char *argv[])

{

  int result = 0;

  wint_t ch;

  for (ch = 0; ch < 128; ++ch)

    {

      if (iswlower (ch))

	{

	  /* Get corresponding upper case character.  */

	  wint_t up = towupper (ch);

	  /* This should have no effect.  */

	  wint_t low  = towlower (ch);

	  if ((ch != low) || (up == ch) || (up == low))

	    {

	      printf ("iswlower/towupper/towlower for character \\%x failed\n", ch);

	      result++;

	    }

	}

      if (iswupper (ch))

	{

	  /* Get corresponding lower case character.  */

	  wint_t low = towlower (ch);

	  /* This should have no effect.  */

	  wint_t up  = towupper (ch);

	  if ((ch != up) || (low == ch) || (up == low))

	    {

	      printf ("iswupper/towlower/towupper for character \\%x failed\n", ch);

	      result++;

	    }

	}

    }

  /* Finally some specific tests.  */

  ch = L'A';

  if (!iswupper (ch) || iswlower (ch))

    {

      printf ("!iswupper/iswlower (L'A') failed\n");

      result++;

    }

  ch = L'a';

  if (iswupper (ch) || !iswlower (ch))

    {

      printf ("iswupper/!iswlower (L'a') failed\n");

      result++;

    }

  if (towlower (L'A') != L'a')

    {

      printf ("towlower(L'A') failed\n");

      result++;

    }

  if (towupper (L'a') != L'A')

    {

      printf ("towupper(L'a') failed\n");

      result++;

    }

  if (result == 0)

    puts ("All test successful!");

  return result != 0;

}