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/* Copyright (C) 1995, 1996, 2000, 2001, 2006, 2008 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "libguile/_scm.h"
#include "libguile/validate.h"
#include "libguile/boolean.h"
#include "libguile/lang.h"
#include "libguile/tags.h"
SCM_DEFINE (scm_not, "not", 1, 0, 0,
(SCM x),
"Return @code{#t} iff @var{x} is @code{#f}, else return @code{#f}.")
#define FUNC_NAME s_scm_not
{
return scm_from_bool (scm_is_false (x) || SCM_NILP (x));
}
#undef FUNC_NAME
SCM_DEFINE (scm_boolean_p, "boolean?", 1, 0, 0,
(SCM obj),
"Return @code{#t} iff @var{obj} is either @code{#t} or @code{#f}.")
#define FUNC_NAME s_scm_boolean_p
{
return scm_from_bool (scm_is_bool (obj) || SCM_NILP (obj));
}
#undef FUNC_NAME
int
scm_is_bool (SCM x)
{
return scm_is_eq (x, SCM_BOOL_F) || scm_is_eq (x, SCM_BOOL_T);
}
int
scm_to_bool (SCM x)
{
if (scm_is_eq (x, SCM_BOOL_F))
return 0;
else if (scm_is_eq (x, SCM_BOOL_T))
return 1;
else
scm_wrong_type_arg (NULL, 0, x);
}
void
scm_init_boolean ()
{
#include "libguile/boolean.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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