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[bpt/guile.git] / libguile / boolean.c

/*	Copyright (C) 1995, 1996, 2000, 2001 Free Software Foundation, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 *
 * As a special exception, the Free Software Foundation gives permission
 * for additional uses of the text contained in its release of GUILE.
 *
 * The exception is that, if you link the GUILE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the GUILE library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the
 * Free Software Foundation under the name GUILE.  If you copy
 * code from other Free Software Foundation releases into a copy of
 * GUILE, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for GUILE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.  */


\f

#include "libguile/_scm.h"

#include "libguile/validate.h"
#include "libguile/boolean.h"
#include "libguile/lang.h"
\f


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_BOOL(SCM_FALSEP (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_BOOL (SCM_BOOLP (obj) || SCM_NILP (obj));
}
#undef FUNC_NAME



void
scm_init_boolean ()
{
#include "libguile/boolean.x"
}


/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/