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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef BOOLEANH | |
4 | #define BOOLEANH | |
5 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd | 45 | \f |
b4309c3c | 46 | #include "libguile/__scm.h" |
0f2d19dd JB |
47 | |
48 | \f | |
49 | ||
50 | /* Boolean Values | |
51 | * | |
52 | */ | |
53 | #define SCM_FALSEP(x) (SCM_BOOL_F == (x)) | |
54 | #define SCM_NFALSEP(x) (SCM_BOOL_F != (x)) | |
55 | ||
a9967b3d GB |
56 | #define SCM_BOOLP(x) ((x) == SCM_BOOL_T || (x) == SCM_BOOL_F) |
57 | ||
58 | /* Convert from a C boolean to a SCM boolean value */ | |
59 | #define SCM_BOOL(f) ((f)? SCM_BOOL_T : SCM_BOOL_F) | |
60 | ||
61 | /* Convert from a C boolean to a SCM boolean value and negate it */ | |
62 | #define SCM_NEGATE_BOOL(f) ((f)? SCM_BOOL_F : SCM_BOOL_T) | |
63 | ||
0f2d19dd JB |
64 | /* SCM_BOOL_NOT returns the other boolean. |
65 | * The order of ^s here is important for Borland C++ (!?!?!) | |
66 | */ | |
f1267706 | 67 | #define SCM_BOOL_NOT(x) SCM_PACK(SCM_UNPACK(x) ^ (SCM_UNPACK (SCM_BOOL_T) ^ SCM_UNPACK (SCM_BOOL_F))) |
0f2d19dd JB |
68 | |
69 | \f | |
70 | ||
7866a09b GB |
71 | extern SCM scm_not (SCM x); |
72 | extern SCM scm_boolean_p (SCM obj); | |
73 | extern void scm_init_boolean (void); | |
0f2d19dd JB |
74 | |
75 | #endif /* BOOLEANH */ | |
89e00824 ML |
76 | |
77 | /* | |
78 | Local Variables: | |
79 | c-file-style: "gnu" | |
80 | End: | |
81 | */ |