| 1 | /* Copyright (C) 1995,1996, 2000 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 | |
| 42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, |
| 43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ |
| 44 | |
| 45 | \f |
| 46 | |
| 47 | #include <stdio.h> |
| 48 | #include "_scm.h" |
| 49 | #include "hashtab.h" |
| 50 | #include "alist.h" |
| 51 | #include "root.h" |
| 52 | #include "weaks.h" |
| 53 | |
| 54 | #include "objprop.h" |
| 55 | \f |
| 56 | |
| 57 | /* {Object Properties} |
| 58 | */ |
| 59 | |
| 60 | SCM_DEFINE (scm_object_properties, "object-properties", 1, 0, 0, |
| 61 | (SCM obj), |
| 62 | "@deffnx primitive procedure-properties obj\n" |
| 63 | "Return @var{obj}'s property list.") |
| 64 | #define FUNC_NAME s_scm_object_properties |
| 65 | { |
| 66 | return scm_hashq_ref (scm_object_whash, obj, SCM_EOL); |
| 67 | } |
| 68 | #undef FUNC_NAME |
| 69 | |
| 70 | |
| 71 | SCM_DEFINE (scm_set_object_properties_x, "set-object-properties!", 2, 0, 0, |
| 72 | (SCM obj, SCM plist), |
| 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 |
| 76 | { |
| 77 | SCM handle = scm_hashq_create_handle_x (scm_object_whash, obj, plist); |
| 78 | SCM_SETCDR (handle, plist); |
| 79 | return plist; |
| 80 | } |
| 81 | #undef FUNC_NAME |
| 82 | |
| 83 | SCM_DEFINE (scm_object_property, "object-property", 2, 0, 0, |
| 84 | (SCM obj, SCM key), |
| 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 |
| 88 | { |
| 89 | SCM assoc; |
| 90 | assoc = scm_assq (key, scm_object_properties (obj)); |
| 91 | return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); |
| 92 | } |
| 93 | #undef FUNC_NAME |
| 94 | |
| 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" |
| 99 | "@var{value}.") |
| 100 | #define FUNC_NAME s_scm_set_object_property_x |
| 101 | { |
| 102 | SCM h; |
| 103 | SCM assoc; |
| 104 | h = scm_hashq_create_handle_x (scm_object_whash, obj, SCM_EOL); |
| 105 | SCM_DEFER_INTS; |
| 106 | assoc = scm_assq (key, SCM_CDR (h)); |
| 107 | if (SCM_NIMP (assoc)) |
| 108 | SCM_SETCDR (assoc, val); |
| 109 | else |
| 110 | { |
| 111 | assoc = scm_acons (key, val, SCM_CDR (h)); |
| 112 | SCM_SETCDR (h, assoc); |
| 113 | } |
| 114 | SCM_ALLOW_INTS; |
| 115 | return val; |
| 116 | } |
| 117 | #undef FUNC_NAME |
| 118 | |
| 119 | |
| 120 | void |
| 121 | scm_init_objprop () |
| 122 | { |
| 123 | scm_object_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (511)); |
| 124 | #include "objprop.x" |
| 125 | } |
| 126 | |