/* Test of <stdbool.h> substitute.

   Copyright (C) 2002-2007, 2009-2020 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>, 2007.  */

/* We want this test to succeed even when using gcc's -Werror; but to

   do that requires a pragma that didn't exist before 4.3.0.  */

#ifndef __GNUC__

# define ADDRESS_CHECK_OKAY

#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)

/* No way to silence -Waddress.  */

#else

# pragma GCC diagnostic ignored "-Waddress"

# define ADDRESS_CHECK_OKAY

#endif

#include <config.h>

#include <stdbool.h>

#ifndef bool

 "error: bool is not defined"

#endif

#ifndef false

 "error: false is not defined"

#endif

#if false

 "error: false is not 0"

#endif

#ifndef true

 "error: true is not defined"

#endif

#if true != 1

 "error: true is not 1"

#endif

#ifndef __bool_true_false_are_defined

 "error: __bool_true_false_are_defined is not defined"

#endif

/* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at

   least, not for all compilers and compiler options.  */

#if HAVE_STDBOOL_H || 3 <= __GNUC__

struct s { _Bool s: 1; _Bool t; } s;

#endif

char a[true == 1 ? 1 : -1];

char b[false == 0 ? 1 : -1];

char c[__bool_true_false_are_defined == 1 ? 1 : -1];

#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above.  */

char d[(bool) 0.5 == true ? 1 : -1];

# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */

/* C99 may plausibly be interpreted as not requiring support for a cast from

   a variable's address to bool in a static initializer.  So treat it like a

   GCC extension.  */

#  ifdef __GNUC__

bool e = &s;

#  endif

# endif

char f[(_Bool) 0.0 == false ? 1 : -1];

#endif

char g[true];

char h[sizeof (_Bool)];

#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above.  */

char i[sizeof s.t];

#endif

enum { j = false, k = true, l = false * true, m = true * 256 };

_Bool n[m];

char o[sizeof n == m * sizeof n[0] ? 1 : -1];

char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];

/* Catch a bug in an HP-UX C compiler.  See

   https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html

   https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html

 */

_Bool q = true;

_Bool *pq = &q;

int

main ()

{

  int error = 0;

#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above.  */

# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */

  /* A cast from a variable's address to bool is valid in expressions.  */

  {

    bool e1 = &s;

    if (!e1)

      error = 1;

  }

# endif

#endif

  /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0

     reported by James Lemley on 2005-10-05; see

     https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html

     This is a runtime test, since a corresponding compile-time

     test would rely on initializer extensions.  */

  {

    char digs[] = "0123456789";

    if (&(digs + 5)[-2 + (bool) 1] != &digs[4])

      error = 1;

  }

  return error;

}