libguile/boolean.c

   1 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program 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
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  16  *
  17  * As a special exception, the Free Software Foundation gives permission
  18  * for additional uses of the text contained in its release of GUILE.
  19  *
  20  * The exception is that, if you link the GUILE library with other files
  21  * to produce an executable, this does not by itself cause the
  22  * resulting executable to be covered by the GNU General Public License.
  23  * Your use of that executable is in no way restricted on account of
  24  * linking the GUILE library code into it.
  25  *
  26  * This exception does not however invalidate any other reasons why
  27  * the executable file might be covered by the GNU General Public License.
  28  *
  29  * This exception applies only to the code released by the
  30  * Free Software Foundation under the name GUILE.  If you copy
  31  * code from other Free Software Foundation releases into a copy of
  32  * GUILE, as the General Public License permits, the exception does
  33  * not apply to the code that you add in this way.  To avoid misleading
  34  * anyone as to the status of such modified files, you must delete
  35  * this exception notice from them.
  36  *
  37  * If you write modifications of your own for GUILE, it is your choice
  38  * whether to permit this exception to apply to your modifications.
  39  * If you do not wish that, delete this exception notice.
  40  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45 \f
  46
  47
  48 SCM_PROC(s_not, "not", 1, 0, 0, scm_not);
  49 #ifdef __STDC__
  50 SCM
  51 scm_not(SCM x)
  52 #else
  53 SCM
  54 scm_not(x)
  55      SCM x;
  56 #endif
  57 {
  58         return SCM_FALSEP(x) ? SCM_BOOL_T : SCM_BOOL_F;
  59 }
  60
  61
  62 SCM_PROC(s_boolean_p, "boolean?", 1, 0, 0, scm_boolean_p);
  63 #ifdef __STDC__
  64 SCM
  65 scm_boolean_p(SCM obj)
  66 #else
  67 SCM
  68 scm_boolean_p(obj)
  69      SCM obj;
  70 #endif
  71 {
  72         if (SCM_BOOL_F==obj) return SCM_BOOL_T;
  73         if (SCM_BOOL_T==obj) return SCM_BOOL_T;
  74         return SCM_BOOL_F;
  75 }
  76
  77
  78 #ifdef __STDC__
  79 void
  80 scm_init_boolean (void)
  81 #else
  82 void
  83 scm_init_boolean ()
  84 #endif
  85 {
  86 #include "boolean.x"
  87 }
  88