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1/* $OpenBSD: stdbool.h,v 1.7 2015/09/04 23:47:09 daniel Exp $ */
2
3/*
4 * Written by Marc Espie, September 25, 1999
5 * Public domain.
6 */
7
8#ifndef _STDBOOL_H_
9#define _STDBOOL_H_
10
11#ifndef __cplusplus
12
13#if defined(__GNUC__) || \
14 (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901)
15/* Support for C99: type _Bool is already built-in. */
16#define false 0
17#define true 1
18
19#else
20/* `_Bool' type must promote to `int' or `unsigned int'. */
21typedef enum {
22 false = 0,
23 true = 1
24} _Bool;
25
26/* And those constants must also be available as macros. */
27#define false false
28#define true true
29
30#endif
31
32/* User visible type `bool' is provided as a macro which may be redefined */
33#define bool _Bool
34
35#else /* __cplusplus */
36#define _Bool bool
37#define bool bool
38#define false false
39#define true true
40#endif /* __cplusplus */
41
42/* Inform that everything is fine */
43#define __bool_true_false_are_defined 1
44
45#endif /* _STDBOOL_H_ */