| 1 | /* Test of <stdbool.h> substitute.
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| 2 | Copyright (C) 2002-2007, 2009-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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| 18 |
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| 19 | /* We want this test to succeed even when using gcc's -Werror; but to
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| 20 | do that requires a pragma that didn't exist before 4.3.0. */
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| 21 | #ifndef __GNUC__
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| 22 | # define ADDRESS_CHECK_OKAY
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| 23 | #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
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| 24 | /* No way to silence -Waddress. */
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| 25 | #else
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| 26 | # pragma GCC diagnostic ignored "-Waddress"
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| 27 | # define ADDRESS_CHECK_OKAY
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| 28 | #endif
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| 29 |
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| 30 | #include <config.h>
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| 31 |
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| 32 | #include <stdbool.h>
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| 33 |
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| 34 | #ifndef bool
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| 35 | "error: bool is not defined"
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| 36 | #endif
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| 37 | #ifndef false
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| 38 | "error: false is not defined"
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| 39 | #endif
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| 40 | #if false
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| 41 | "error: false is not 0"
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| 42 | #endif
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| 43 | #ifndef true
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| 44 | "error: true is not defined"
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| 45 | #endif
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| 46 | #if true != 1
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| 47 | "error: true is not 1"
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| 48 | #endif
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| 49 | #ifndef __bool_true_false_are_defined
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| 50 | "error: __bool_true_false_are_defined is not defined"
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| 51 | #endif
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| 52 |
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| 53 | /* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at
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| 54 | least, not for all compilers and compiler options. */
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| 55 | #if HAVE_STDBOOL_H || 3 <= __GNUC__
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| 56 | struct s { _Bool s: 1; _Bool t; } s;
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| 57 | #endif
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| 58 |
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| 59 | char a[true == 1 ? 1 : -1];
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| 60 | char b[false == 0 ? 1 : -1];
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| 61 | char c[__bool_true_false_are_defined == 1 ? 1 : -1];
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| 62 | #if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
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| 63 | char d[(bool) 0.5 == true ? 1 : -1];
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| 64 | # ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */
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| 65 | /* C99 may plausibly be interpreted as not requiring support for a cast from
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| 66 | a variable's address to bool in a static initializer. So treat it like a
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| 67 | GCC extension. */
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| 68 | # ifdef __GNUC__
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| 69 | bool e = &s;
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| 70 | # endif
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| 71 | # endif
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| 72 | char f[(_Bool) 0.0 == false ? 1 : -1];
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| 73 | #endif
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| 74 | char g[true];
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| 75 | char h[sizeof (_Bool)];
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| 76 | #if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
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| 77 | char i[sizeof s.t];
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| 78 | #endif
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| 79 | enum { j = false, k = true, l = false * true, m = true * 256 };
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| 80 | _Bool n[m];
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| 81 | char o[sizeof n == m * sizeof n[0] ? 1 : -1];
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| 82 | char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
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| 83 | /* Catch a bug in an HP-UX C compiler. See
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| 84 | http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
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| 85 | http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
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| 86 | */
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| 87 | _Bool q = true;
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| 88 | _Bool *pq = &q;
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| 89 |
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| 90 | int
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| 91 | main ()
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| 92 | {
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| 93 | int error = 0;
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| 94 |
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| 95 | #if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
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| 96 | # ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */
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| 97 | /* A cast from a variable's address to bool is valid in expressions. */
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| 98 | {
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| 99 | bool e1 = &s;
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| 100 | if (!e1)
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| 101 | error = 1;
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| 102 | }
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| 103 | # endif
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| 104 | #endif
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| 105 |
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| 106 | /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
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| 107 | reported by James Lemley on 2005-10-05; see
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| 108 | http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
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| 109 | This is a runtime test, since a corresponding compile-time
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| 110 | test would rely on initializer extensions. */
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| 111 | {
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| 112 | char digs[] = "0123456789";
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| 113 | if (&(digs + 5)[-2 + (bool) 1] != &digs[4])
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| 114 | error = 1;
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| 115 | }
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| 116 |
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| 117 | return error;
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| 118 | }
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