| 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, Inc., 59 Temple Place, Suite 330, |
| 16 | * Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * As a special exception, the Free Software Foundation gives permission |
| 19 | * for additional uses of the text contained in its release of GUILE. |
| 20 | * |
| 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. |
| 26 | * |
| 27 | * This exception does not however invalidate any other reasons why |
| 28 | * the executable file might be covered by the GNU General Public License. |
| 29 | * |
| 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. |
| 37 | * |
| 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. */ |
| 41 | \f |
| 42 | |
| 43 | #include <stdio.h> |
| 44 | #include "_scm.h" |
| 45 | #include "hashtab.h" |
| 46 | #include "alist.h" |
| 47 | #include "weaks.h" |
| 48 | |
| 49 | #include "objprop.h" |
| 50 | \f |
| 51 | |
| 52 | /* {Object Properties} |
| 53 | */ |
| 54 | |
| 55 | SCM_PROC(s_object_properties, "object-properties", 1, 0, 0, scm_object_properties); |
| 56 | |
| 57 | SCM |
| 58 | scm_object_properties (obj) |
| 59 | SCM obj; |
| 60 | { |
| 61 | return scm_hashq_ref (scm_object_whash, obj, SCM_EOL); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | SCM_PROC(s_set_object_properties_x, "set-object-properties!", 2, 0, 0, scm_set_object_properties_x); |
| 66 | |
| 67 | SCM |
| 68 | scm_set_object_properties_x (obj, plist) |
| 69 | SCM obj; |
| 70 | SCM plist; |
| 71 | { |
| 72 | SCM handle = scm_hashq_create_handle_x (scm_object_whash, obj, plist); |
| 73 | SCM_SETCDR (handle, plist); |
| 74 | return plist; |
| 75 | } |
| 76 | |
| 77 | SCM_PROC(s_object_property, "object-property", 2, 0, 0, scm_object_property); |
| 78 | |
| 79 | SCM |
| 80 | scm_object_property (obj, key) |
| 81 | SCM obj; |
| 82 | SCM key; |
| 83 | { |
| 84 | SCM assoc; |
| 85 | assoc = scm_assq (key, scm_object_properties (obj)); |
| 86 | return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); |
| 87 | } |
| 88 | |
| 89 | SCM_PROC(s_set_object_property_x, "set-object-property!", 3, 0, 0, scm_set_object_property_x); |
| 90 | |
| 91 | SCM |
| 92 | scm_set_object_property_x (obj, key, val) |
| 93 | SCM obj; |
| 94 | SCM key; |
| 95 | SCM val; |
| 96 | { |
| 97 | SCM h; |
| 98 | SCM assoc; |
| 99 | h = scm_hashq_create_handle_x (scm_object_whash, obj, SCM_EOL); |
| 100 | SCM_DEFER_INTS; |
| 101 | assoc = scm_assoc (key, SCM_CDR (h)); |
| 102 | if (SCM_NIMP (assoc)) |
| 103 | SCM_SETCDR (assoc, val); |
| 104 | else |
| 105 | { |
| 106 | assoc = scm_acons (key, val, SCM_CDR (h)); |
| 107 | SCM_SETCDR (h, assoc); |
| 108 | } |
| 109 | SCM_ALLOW_INTS; |
| 110 | return val; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | void |
| 115 | scm_init_objprop () |
| 116 | { |
| 117 | scm_object_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (511)); |
| 118 | #include "objprop.x" |
| 119 | } |
| 120 | |