5 /* Copyright (C) 1995,1996 Free Software Foundation, Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this software; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307 USA
22 * As a special exception, the Free Software Foundation gives permission
23 * for additional uses of the text contained in its release of GUILE.
25 * The exception is that, if you link the GUILE library with other files
26 * to produce an executable, this does not by itself cause the
27 * resulting executable to be covered by the GNU General Public License.
28 * Your use of that executable is in no way restricted on account of
29 * linking the GUILE library code into it.
31 * This exception does not however invalidate any other reasons why
32 * the executable file might be covered by the GNU General Public License.
34 * This exception applies only to the code released by the
35 * Free Software Foundation under the name GUILE. If you copy
36 * code from other Free Software Foundation releases into a copy of
37 * GUILE, as the General Public License permits, the exception does
38 * not apply to the code that you add in this way. To avoid misleading
39 * anyone as to the status of such modified files, you must delete
40 * this exception notice from them.
42 * If you write modifications of your own for GUILE, it is your choice
43 * whether to permit this exception to apply to your modifications.
44 * If you do not wish that, delete this exception notice. */
46 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
47 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
49 #include "libguile/__scm.h"
56 extern int scm_tc16_variable
;
58 #define SCM_VARVCELL(V) SCM_CDR(V)
59 #define SCM_VARIABLEP(X) (SCM_NIMP(X) && (scm_tc16_variable == SCM_CAR(X)))
60 #define SCM_UDVARIABLEP(X) (SCM_VARIABLEP(X) && SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (X))))
61 #define SCM_DEFVARIABLEP(X) (SCM_VARIABLEP(X) && !SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (X))))
65 extern SCM
scm_make_variable (SCM init
, SCM name_hint
);
66 extern SCM
scm_make_undefined_variable (SCM name_hint
);
67 extern SCM
scm_variable_p (SCM obj
);
68 extern SCM
scm_variable_ref (SCM var
);
69 extern SCM
scm_variable_set_x (SCM var
, SCM val
);
70 extern SCM
scm_builtin_variable (SCM name
);
71 extern SCM
scm_variable_bound_p (SCM var
);
72 extern void scm_init_variable (void);
74 #endif /* VARIABLEH */