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1 /*
2 * Project : tin - a Usenet reader
3 * Module : bool.h
4 * Author : Urs Janssen <urs@tin.org>
5 * Created :
6 * Updated : 2013-01-09
7 * Notes :
8 *
9 * Copyright (c) 1997-2022 Urs Janssen <urs@tin.org>
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
18 *
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * 3. Neither the name of the copyright holder nor the names of its
24 * contributors may be used to endorse or promote products derived from
25 * this software without specific prior written permission.
26 *
27 * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40
41 #ifndef BOOL_H
42 # define BOOL_H 1
43
44 # if 0
45 /*
46 * This is the correct way, but causes problems on some systems
47 * e.g. SuSE-7.3 (IA-32)
48 */
49 # ifndef __cplusplus
50 # ifdef HAVE_STDBOOL_H
51 # include <stdbool.h>
52 # ifdef _Bool
53 typefdef _Bool t_bool;
54 # endif /* _Bool */
55 # endif /* HAVE_STDBOOL_H */
56 # endif /* __cplusplus */
57 # ifndef FALSE
58 # define FALSE 0
59 # endif /* !FALSE */
60 # ifndef TRUE
61 # define TRUE (!FALSE)
62 # endif /* !TRUE */
63 # ifndef t_bool
64 typedef unsigned t_bool; /* don't make this a char or short! */
65 # endif /* t_bool */
66
67 # else
68
69 # ifndef FALSE
70 # define FALSE 0
71 # endif /* !FALSE */
72
73 # ifndef TRUE
74 # define TRUE (!FALSE)
75 # endif /* !TRUE */
76
77 typedef unsigned t_bool; /* don't make this a char or short! */
78
79 # endif /* 0 */
80
81 # define bool_not(b) ((b) ? FALSE : TRUE)
82 # define bool_equal(a,b) ((a) ? (b) : (bool_not(b)))
83 # define bool_unparse(b) ((b) ? "TRUE" : "FALSE")
84
85 #endif /* !BOOL_H */