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| -rw-r--r-- | include/stdbool.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/stdbool.h b/include/stdbool.h new file mode 100644 index 0000000..3025899 --- /dev/null +++ b/include/stdbool.h @@ -0,0 +1,57 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * 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 <http://www.gnu.org/licenses/>. + */ +#ifndef _STDBOOL_H +#define _STDBOOL_H +#include <slibc/version.h> + + + +/* These should be macros, because the user is allowed to undefine them. + * It is however stated that this is an obsolescent feature that may be + * removed in the future. */ + + +/** + * A variant of `int`. Any non-zero data casted to this type + * is converted to 1 (just like prefixing with `!!`). This + * assures that overflow during cast does not cause a non-zero + * value to be converted to zero. + */ +#define bool _Bool + +/** + * A true value. + */ +#define true 1 + +/** + * An untrue value. + */ +#define false 0 + +/** + * This macro can be relied on being defined and set to 1 if + * <stdbool.h> has defined the type `bool` (as a macro) and + * the constants (macros) `true` and `false`. + */ +#define __bool_true_false_are_defined 1 + + + +#endif + |