1 /* Copyright (C) 1995,1996, 2000 Free Software Foundation, Inc.
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)
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.
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, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
43 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
57 /* {Object Properties}
60 SCM_DEFINE (scm_object_properties
, "object-properties", 1, 0, 0,
62 "@deffnx primitive procedure-properties obj\n"
63 "Return @var{obj}'s property list.")
64 #define FUNC_NAME s_scm_object_properties
66 return scm_hashq_ref (scm_object_whash
, obj
, SCM_EOL
);
71 SCM_DEFINE (scm_set_object_properties_x
, "set-object-properties!", 2, 0, 0,
73 "@deffnx primitive set-procedure-properties! obj alist\n"
74 "Set @var{obj}'s property list to @var{alist}.")
75 #define FUNC_NAME s_scm_set_object_properties_x
77 SCM handle
= scm_hashq_create_handle_x (scm_object_whash
, obj
, plist
);
78 SCM_SETCDR (handle
, plist
);
83 SCM_DEFINE (scm_object_property
, "object-property", 2, 0, 0,
85 "@deffnx primitive procedure-property obj key\n"
86 "Return the property of @var{obj} with name @var{key}.")
87 #define FUNC_NAME s_scm_object_property
90 assoc
= scm_assq (key
, scm_object_properties (obj
));
91 return (SCM_NIMP (assoc
) ? SCM_CDR (assoc
) : SCM_BOOL_F
);
95 SCM_DEFINE (scm_set_object_property_x
, "set-object-property!", 3, 0, 0,
96 (SCM obj
, SCM key
, SCM val
),
97 "@deffnx primitive set-procedure-property! obj key value\n"
98 "In @var{obj}'s property list, set the property named @var{key} to\n"
100 #define FUNC_NAME s_scm_set_object_property_x
104 h
= scm_hashq_create_handle_x (scm_object_whash
, obj
, SCM_EOL
);
106 assoc
= scm_assq (key
, SCM_CDR (h
));
107 if (SCM_NIMP (assoc
))
108 SCM_SETCDR (assoc
, val
);
111 assoc
= scm_acons (key
, val
, SCM_CDR (h
));
112 SCM_SETCDR (h
, assoc
);
123 scm_object_whash
= scm_make_weak_key_hash_table (SCM_MAKINUM (511));