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Diffstat (limited to 'gnulib-tests/test-stdbool.c')
| -rw-r--r-- | gnulib-tests/test-stdbool.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/gnulib-tests/test-stdbool.c b/gnulib-tests/test-stdbool.c new file mode 100644 index 0000000..b128b55 --- /dev/null +++ b/gnulib-tests/test-stdbool.c @@ -0,0 +1,118 @@ +/* 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; +} |