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1 | ;; Common Lisp bindings for GTK+ v2.0 |
2 | ;; Copyright (C) 2000-2001 Espen S. Johnsen <esj@stud.cs.uit.no> |
3 | ;; |
4 | ;; This library is free software; you can redistribute it and/or |
5 | ;; modify it under the terms of the GNU Lesser General Public |
6 | ;; License as published by the Free Software Foundation; either |
7 | ;; version 2 of the License, or (at your option) any later version. |
8 | ;; |
9 | ;; This library is distributed in the hope that it will be useful, |
10 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | ;; Lesser General Public License for more details. |
13 | ;; |
14 | ;; You should have received a copy of the GNU Lesser General Public |
15 | ;; License along with this library; if not, write to the Free Software |
16 | ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | |
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18 | ;; $Id: genums.lisp,v 1.6 2005-02-01 15:24:52 espen Exp $ |
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19 | |
20 | (in-package "GLIB") |
21 | |
22 | |
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23 | (defun %map-enum (args op) |
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24 | (let ((current-value 0)) |
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25 | (mapcar |
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26 | #'(lambda (mapping) |
27 | (destructuring-bind (symbol &optional (value current-value)) |
28 | (mklist mapping) |
29 | (setf current-value (1+ value)) |
30 | (case op |
31 | (:enum-int (list symbol value)) |
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32 | (:flags-int (list symbol value)) |
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33 | (:int-enum (list value symbol)) |
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34 | (:int-flags (list value symbol)) |
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35 | (:symbols symbol)))) |
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36 | args))) |
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37 | |
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38 | (defun %query-enum-or-flags-values (query-function class type) |
39 | (multiple-value-bind (sap length) |
40 | (funcall query-function (type-class-ref type)) |
41 | (let ((values nil) |
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42 | (size (proxy-instance-size (find-class class))) |
43 | (proxy (make-instance class :location sap))) |
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44 | (dotimes (i length) |
45 | (with-slots (location nickname value) proxy |
46 | (setf location sap) |
47 | (setq sap (sap+ sap size)) |
48 | (push |
49 | (list |
50 | (intern (substitute #\- #\_ (string-upcase nickname)) "KEYWORD") |
51 | value) |
52 | values))) |
53 | values))) |
54 | |
55 | |
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56 | ;;;; Generic enum type |
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57 | |
58 | (deftype enum (&rest args) |
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59 | `(member ,@(%map-enum args :symbols))) |
60 | |
61 | (defmethod alien-type ((type (eql 'enum)) &rest args) |
62 | (declare (ignore type args)) |
63 | (alien-type 'signed)) |
64 | |
65 | (defmethod size-of ((type (eql 'enum)) &rest args) |
66 | (declare (ignore type args)) |
67 | (size-of 'signed)) |
68 | |
69 | (defmethod to-alien-form (form (type (eql 'enum)) &rest args) |
70 | (declare (ignore type)) |
71 | `(ecase ,form |
72 | ,@(%map-enum args :enum-int))) |
73 | |
74 | (defmethod from-alien-form (form (type (eql 'enum)) &rest args) |
75 | (declare (ignore type)) |
76 | `(ecase ,form |
77 | ,@(%map-enum args :int-enum))) |
78 | |
79 | (defmethod to-alien-function ((type (eql 'enum)) &rest args) |
80 | (let ((mappings (%map-enum args :enum-int))) |
81 | #'(lambda (enum) |
82 | (or |
83 | (second (assoc enum mappings)) |
84 | (error "~S is not of type ~S" enum (cons type args)))))) |
85 | |
86 | (defmethod from-alien-function ((type (eql 'enum)) &rest args) |
87 | (declare (ignore type)) |
88 | (let ((mappings (%map-enum args :int-enum))) |
89 | #'(lambda (int) |
90 | (second (assoc int mappings))))) |
91 | |
92 | (defmethod writer-function ((type (eql 'enum)) &rest args) |
93 | (declare (ignore type)) |
94 | (let ((writer (writer-function 'signed)) |
95 | (function (apply #'to-alien-function 'enum args))) |
96 | #'(lambda (enum location &optional (offset 0)) |
97 | (funcall writer (funcall function enum) location offset)))) |
98 | |
99 | (defmethod reader-function ((type (eql 'enum)) &rest args) |
100 | (declare (ignore type)) |
101 | (let ((reader (reader-function 'signed)) |
102 | (function (apply #'from-alien-function 'enum args))) |
103 | #'(lambda (location &optional (offset 0)) |
104 | (funcall function (funcall reader location offset))))) |
105 | |
106 | |
107 | |
108 | (defclass %enum-value (struct) |
109 | ((value :allocation :alien :type int) |
110 | (name :allocation :alien :type string) |
111 | (nickname :allocation :alien :type string)) |
112 | (:metaclass static-struct-class)) |
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113 | |
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114 | (defbinding %enum-class-values () pointer |
115 | (class pointer) |
116 | (n-values unsigned-int :out)) |
117 | |
118 | (defun query-enum-values (type) |
119 | (%query-enum-or-flags-values #'%enum-class-values '%enum-value type)) |
120 | |
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121 | (defun enum-int (enum type) |
122 | (funcall (to-alien-function type) enum)) |
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123 | |
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124 | (defun int-enum (int type) |
125 | (funcall (from-alien-function type) int)) |
126 | |
127 | (defun enum-mapping (type) |
128 | (rest (type-expand-to 'enum type))) |
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129 | |
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130 | ;;;; Generic flags type |
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131 | |
132 | (deftype flags (&rest args) |
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133 | `(or null (cons (member ,@(%map-enum args :symbols)) list))) |
134 | |
135 | (defmethod alien-type ((type (eql 'flags)) &rest args) |
136 | (declare (ignore type args)) |
137 | (alien-type 'unsigned)) |
138 | |
139 | (defmethod size-of ((type (eql 'flags)) &rest args) |
140 | (declare (ignore type args)) |
141 | (size-of 'unsigned)) |
142 | |
143 | (defmethod to-alien-form (flags (type (eql 'flags)) &rest args) |
144 | `(loop |
145 | with value = 0 |
146 | with flags = ,flags |
147 | for flag in (mklist flags) |
148 | do (let ((flagval |
149 | (or |
150 | (second (assoc flag ',(%map-enum args :flags-int))) |
151 | (error "~S is not of type ~S" flags '(,type ,@args))))) |
152 | (setq value (logior value flagval))) |
153 | finally (return value))) |
154 | |
155 | (defmethod from-alien-form (int (type (eql 'flags)) &rest args) |
156 | (declare (ignore type)) |
157 | `(loop |
158 | for mapping in ',(%map-enum args :int-flags) |
159 | unless (zerop (logand int (first mapping))) |
160 | collect (second mapping))) |
161 | |
162 | (defmethod to-alien-function ((type (eql 'flags)) &rest args) |
163 | (let ((mappings (%map-enum args :flags-int))) |
164 | #'(lambda (flags) |
165 | (loop |
166 | with value = 0 |
167 | for flag in (mklist flags) |
168 | do (let ((flagval (or |
169 | (second (assoc flag mappings)) |
170 | (error "~S is not of type ~S" flags (cons type args))))) |
171 | (setq value (logior value flagval))) |
172 | finally (return value))))) |
173 | |
174 | (defmethod from-alien-function ((type (eql 'flags)) &rest args) |
175 | (declare (ignore type)) |
176 | (let ((mappings (%map-enum args :int-flags))) |
177 | #'(lambda (int) |
178 | (loop |
179 | for mapping in mappings |
180 | unless (zerop (logand int (first mapping))) |
181 | collect (second mapping))))) |
182 | |
183 | (defmethod writer-function ((type (eql 'flags)) &rest args) |
184 | (declare (ignore type)) |
185 | (let ((writer (writer-function 'unsigned)) |
186 | (function (apply #'to-alien-function 'flags args))) |
187 | #'(lambda (flags location &optional (offset 0)) |
188 | (funcall writer (funcall function flags) location offset)))) |
189 | |
190 | (defmethod reader-function ((type (eql 'flags)) &rest args) |
191 | (declare (ignore type)) |
192 | (let ((reader (reader-function 'unsigned)) |
193 | (function (apply #'from-alien-function 'flags args))) |
194 | #'(lambda (location &optional (offset 0)) |
195 | (funcall function (funcall reader location offset))))) |
196 | |
197 | |
198 | |
199 | (defclass %flags-value (struct) |
200 | ((value :allocation :alien :type unsigned-int) |
201 | (name :allocation :alien :type string) |
202 | (nickname :allocation :alien :type string)) |
203 | (:metaclass static-struct-class)) |
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204 | |
205 | (defbinding %flags-class-values () pointer |
206 | (class pointer) |
207 | (n-values unsigned-int :out)) |
208 | |
209 | (defun query-flags-values (type) |
210 | (%query-enum-or-flags-values #'%flags-class-values '%flags-value type)) |
211 | |
212 | |
213 | |
214 | ;;;; |
215 | |
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216 | (defun expand-enum-type (type-number forward-p options) |
217 | (declare (ignore forward)) |
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218 | (let* ((super (supertype type-number)) |
219 | (type (type-from-number type-number)) |
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220 | (mappings (getf options :mappings)) |
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221 | (expanded-mappings |
222 | (append |
223 | (delete-if |
224 | #'(lambda (mapping) |
225 | (or |
226 | (assoc (first mapping) mappings) |
227 | (rassoc (cdr mapping) mappings :test #'equal))) |
228 | (if (eq super 'enum) |
229 | (query-enum-values type-number) |
230 | (query-flags-values type-number))) |
231 | (remove-if |
232 | #'(lambda (mapping) (eq (second mapping) nil)) mappings)))) |
233 | `(progn |
234 | (register-type ',type ,(find-type-name type-number)) |
235 | (deftype ,type () '(,super ,@expanded-mappings))))) |
236 | |
237 | |
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238 | (register-derivable-type 'enum "GEnum" 'expand-enum-type) |
239 | (register-derivable-type 'flags "GFlags" 'expand-enum-type) |
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240 | |