6 /* Copyright (C) 1995,1996,2000 Free Software Foundation, Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this software; see the file COPYING. If not, write to
20 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
21 * Boston, MA 02111-1307 USA
23 * As a special exception, the Free Software Foundation gives permission
24 * for additional uses of the text contained in its release of GUILE.
26 * The exception is that, if you link the GUILE library with other files
27 * to produce an executable, this does not by itself cause the
28 * resulting executable to be covered by the GNU General Public License.
29 * Your use of that executable is in no way restricted on account of
30 * linking the GUILE library code into it.
32 * This exception does not however invalidate any other reasons why
33 * the executable file might be covered by the GNU General Public License.
35 * This exception applies only to the code released by the
36 * Free Software Foundation under the name GUILE. If you copy
37 * code from other Free Software Foundation releases into a copy of
38 * GUILE, as the General Public License permits, the exception does
39 * not apply to the code that you add in this way. To avoid misleading
40 * anyone as to the status of such modified files, you must delete
41 * this exception notice from them.
43 * If you write modifications of your own for GUILE, it is your choice
44 * whether to permit this exception to apply to your modifications.
45 * If you do not wish that, delete this exception notice. */
49 #include "libguile/__scm.h"
56 #define SCM_FALSEP(x) (SCM_EQ_P ((x), SCM_BOOL_F))
57 #define SCM_NFALSEP(x) (!SCM_FALSEP (x))
59 #define SCM_BOOLP(x) (SCM_EQ_P ((x), SCM_BOOL_F) || SCM_EQ_P ((x), SCM_BOOL_T))
61 /* Convert from a C boolean to a SCM boolean value */
62 #define SCM_BOOL(f) ((f) ? SCM_BOOL_T : SCM_BOOL_F)
64 /* Convert from a C boolean to a SCM boolean value and negate it */
65 #define SCM_NEGATE_BOOL(f) ((f) ? SCM_BOOL_F : SCM_BOOL_T)
67 /* SCM_BOOL_NOT returns the other boolean.
68 * The order of ^s here is important for Borland C++ (!?!?!)
70 #define SCM_BOOL_NOT(x) (SCM_PACK (SCM_UNPACK (x) \
71 ^ (SCM_UNPACK (SCM_BOOL_T) \
72 ^ SCM_UNPACK (SCM_BOOL_F))))
76 SCM_API SCM
scm_not (SCM x
);
77 SCM_API SCM
scm_boolean_p (SCM obj
);
78 SCM_API
void scm_init_boolean (void);
80 #endif /* SCM_BOOLEAN_H */