Commit | Line | Data |
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2b829bbb | 1 | /* Copyright (C) 1995, 1996, 2000, 2001, 2006 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
a0599745 | 21 | #include "libguile/_scm.h" |
20e6290e | 22 | |
a0599745 MD |
23 | #include "libguile/validate.h" |
24 | #include "libguile/boolean.h" | |
c96d76b8 | 25 | #include "libguile/lang.h" |
1fe56d60 MV |
26 | #include "libguile/tags.h" |
27 | ||
0f2d19dd JB |
28 | \f |
29 | ||
30 | ||
3b3b36dd | 31 | SCM_DEFINE (scm_not, "not", 1, 0, 0, |
da4a1dba | 32 | (SCM x), |
cdbc7418 | 33 | "Return @code{#t} iff @var{x} is @code{#f}, else return @code{#f}.") |
1bbd0b84 | 34 | #define FUNC_NAME s_scm_not |
0f2d19dd | 35 | { |
1fe56d60 | 36 | return scm_from_bool (scm_is_false (x) || SCM_NILP (x)); |
0f2d19dd | 37 | } |
1bbd0b84 | 38 | #undef FUNC_NAME |
0f2d19dd JB |
39 | |
40 | ||
3b3b36dd | 41 | SCM_DEFINE (scm_boolean_p, "boolean?", 1, 0, 0, |
1bbd0b84 | 42 | (SCM obj), |
cdbc7418 | 43 | "Return @code{#t} iff @var{obj} is either @code{#t} or @code{#f}.") |
1bbd0b84 | 44 | #define FUNC_NAME s_scm_boolean_p |
0f2d19dd | 45 | { |
1fe56d60 | 46 | return scm_from_bool (scm_is_bool (obj) || SCM_NILP (obj)); |
0f2d19dd | 47 | } |
1bbd0b84 | 48 | #undef FUNC_NAME |
0f2d19dd | 49 | |
3a684cc6 MV |
50 | int |
51 | scm_is_bool (SCM x) | |
52 | { | |
1fe56d60 | 53 | return scm_is_eq (x, SCM_BOOL_F) || scm_is_eq (x, SCM_BOOL_T); |
3a684cc6 | 54 | } |
0f2d19dd | 55 | |
3a684cc6 MV |
56 | int |
57 | scm_to_bool (SCM x) | |
58 | { | |
59 | if (scm_is_eq (x, SCM_BOOL_F)) | |
60 | return 0; | |
61 | else if (scm_is_eq (x, SCM_BOOL_T)) | |
62 | return 1; | |
63 | else | |
64 | scm_wrong_type_arg (NULL, 0, x); | |
65 | } | |
1cc91f1b | 66 | |
0f2d19dd JB |
67 | void |
68 | scm_init_boolean () | |
0f2d19dd | 69 | { |
a0599745 | 70 | #include "libguile/boolean.x" |
0f2d19dd JB |
71 | } |
72 | ||
89e00824 ML |
73 | |
74 | /* | |
75 | Local Variables: | |
76 | c-file-style: "gnu" | |
77 | End: | |
78 | */ |