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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 1.8 2005-02-10 20:27:54 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 | |
131 | ;;;; Named enum types |
132 | |
133 | (defmacro define-enum-type (name &rest args) |
134 | (let ((enum-int (intern (format nil "~A-TO-INT" name))) |
135 | (int-enum (intern (format nil "INT-TO-~A" name)))) |
136 | `(progn |
137 | (deftype ,name () '(enum ,@args)) |
138 | (defun ,enum-int (value) |
139 | (ecase value |
140 | ,@(%map-enum args :enum-int))) |
141 | (defun ,int-enum (value) |
142 | (ecase value |
143 | ,@(%map-enum args :int-enum))) |
144 | (defmethod to-alien-form (form (type (eql ',name)) &rest args) |
145 | (declare (ignore type args)) |
146 | (list ',enum-int form)) |
147 | (defmethod from-alien-form (form (type (eql ',name)) &rest args) |
148 | (declare (ignore type args)) |
149 | (list ',int-enum form)) |
150 | (defmethod to-alien-function ((type (eql ',name)) &rest args) |
151 | (declare (ignore type args)) |
152 | #',enum-int) |
153 | (defmethod from-alien-function ((type (eql ',name)) &rest args) |
154 | (declare (ignore type args)) |
155 | #',int-enum) |
156 | (defmethod writer-function ((type (eql ',name)) &rest args) |
157 | (declare (ignore type args)) |
158 | (let ((writer (writer-function 'signed))) |
159 | #'(lambda (enum location &optional (offset 0)) |
160 | (funcall writer (,enum-int enum) location offset)))) |
161 | (defmethod reader-function ((type (eql ',name)) &rest args) |
162 | (declare (ignore type args)) |
163 | (let ((reader (reader-function 'signed))) |
164 | #'(lambda (location &optional (offset 0)) |
165 | (,int-enum (funcall reader location offset)))))))) |
166 | |
167 | |
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168 | ;;;; Generic flags type |
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169 | |
170 | (deftype flags (&rest args) |
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171 | `(or null (cons (member ,@(%map-enum args :symbols)) list))) |
172 | |
173 | (defmethod alien-type ((type (eql 'flags)) &rest args) |
174 | (declare (ignore type args)) |
175 | (alien-type 'unsigned)) |
176 | |
177 | (defmethod size-of ((type (eql 'flags)) &rest args) |
178 | (declare (ignore type args)) |
179 | (size-of 'unsigned)) |
180 | |
181 | (defmethod to-alien-form (flags (type (eql 'flags)) &rest args) |
182 | `(loop |
183 | with value = 0 |
184 | with flags = ,flags |
185 | for flag in (mklist flags) |
186 | do (let ((flagval |
187 | (or |
188 | (second (assoc flag ',(%map-enum args :flags-int))) |
189 | (error "~S is not of type ~S" flags '(,type ,@args))))) |
190 | (setq value (logior value flagval))) |
191 | finally (return value))) |
192 | |
193 | (defmethod from-alien-form (int (type (eql 'flags)) &rest args) |
194 | (declare (ignore type)) |
195 | `(loop |
196 | for mapping in ',(%map-enum args :int-flags) |
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197 | unless (zerop (logand ,int (first mapping))) |
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198 | collect (second mapping))) |
199 | |
200 | (defmethod to-alien-function ((type (eql 'flags)) &rest args) |
201 | (let ((mappings (%map-enum args :flags-int))) |
202 | #'(lambda (flags) |
203 | (loop |
204 | with value = 0 |
205 | for flag in (mklist flags) |
206 | do (let ((flagval (or |
207 | (second (assoc flag mappings)) |
208 | (error "~S is not of type ~S" flags (cons type args))))) |
209 | (setq value (logior value flagval))) |
210 | finally (return value))))) |
211 | |
212 | (defmethod from-alien-function ((type (eql 'flags)) &rest args) |
213 | (declare (ignore type)) |
214 | (let ((mappings (%map-enum args :int-flags))) |
215 | #'(lambda (int) |
216 | (loop |
217 | for mapping in mappings |
218 | unless (zerop (logand int (first mapping))) |
219 | collect (second mapping))))) |
220 | |
221 | (defmethod writer-function ((type (eql 'flags)) &rest args) |
222 | (declare (ignore type)) |
223 | (let ((writer (writer-function 'unsigned)) |
224 | (function (apply #'to-alien-function 'flags args))) |
225 | #'(lambda (flags location &optional (offset 0)) |
226 | (funcall writer (funcall function flags) location offset)))) |
227 | |
228 | (defmethod reader-function ((type (eql 'flags)) &rest args) |
229 | (declare (ignore type)) |
230 | (let ((reader (reader-function 'unsigned)) |
231 | (function (apply #'from-alien-function 'flags args))) |
232 | #'(lambda (location &optional (offset 0)) |
233 | (funcall function (funcall reader location offset))))) |
234 | |
235 | |
236 | |
237 | (defclass %flags-value (struct) |
238 | ((value :allocation :alien :type unsigned-int) |
239 | (name :allocation :alien :type string) |
240 | (nickname :allocation :alien :type string)) |
241 | (:metaclass static-struct-class)) |
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242 | |
243 | (defbinding %flags-class-values () pointer |
244 | (class pointer) |
245 | (n-values unsigned-int :out)) |
246 | |
247 | (defun query-flags-values (type) |
248 | (%query-enum-or-flags-values #'%flags-class-values '%flags-value type)) |
249 | |
250 | |
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251 | ;;;; Named flags types |
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252 | |
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253 | (defmacro define-flags-type (name &rest args) |
254 | (let ((flags-int (intern (format nil "~A-TO-INT" name))) |
255 | (int-flags (intern (format nil "INT-TO-~A" name)))) |
256 | `(progn |
257 | (deftype ,name () '(flags ,@args)) |
258 | (defun ,flags-int (value) |
259 | (ecase value |
260 | ,@(%map-enum args :flags-int))) |
261 | (defun ,int-flags (value) |
262 | (ecase value |
263 | ,@(%map-enum args :int-flags))) |
264 | (defmethod to-alien-form (form (type (eql ',name)) &rest args) |
265 | (declare (ignore type args)) |
266 | (list ',flags-int form)) |
267 | (defmethod from-alien-form (form (type (eql ',name)) &rest args) |
268 | (declare (ignore type args)) |
269 | (list ',int-flags form)) |
270 | (defmethod to-alien-function ((type (eql ',name)) &rest args) |
271 | (declare (ignore type args)) |
272 | #',flags-int) |
273 | (defmethod from-alien-function ((type (eql ',name)) &rest args) |
274 | (declare (ignore type args)) |
275 | #',int-flags) |
276 | (defmethod writer-function ((type (eql ',name)) &rest args) |
277 | (declare (ignore type args)) |
278 | (let ((writer (writer-function 'signed))) |
279 | #'(lambda (flags location &optional (offset 0)) |
280 | (funcall writer (,flags-int flags) location offset)))) |
281 | (defmethod reader-function ((type (eql ',name)) &rest args) |
282 | (declare (ignore type args)) |
283 | (let ((reader (reader-function 'signed))) |
284 | #'(lambda (location &optional (offset 0)) |
285 | (,int-flags (funcall reader location offset)))))))) |
286 | |
287 | |
288 | |
289 | ;;;; Type definition by introspection |
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290 | |
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291 | (defun expand-enum-type (type-number forward-p options) |
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292 | (declare (ignore forward-p)) |
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293 | (let* ((super (supertype type-number)) |
294 | (type (type-from-number type-number)) |
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295 | (mappings (getf options :mappings)) |
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296 | (expanded-mappings |
297 | (append |
298 | (delete-if |
299 | #'(lambda (mapping) |
300 | (or |
301 | (assoc (first mapping) mappings) |
302 | (rassoc (cdr mapping) mappings :test #'equal))) |
303 | (if (eq super 'enum) |
304 | (query-enum-values type-number) |
305 | (query-flags-values type-number))) |
306 | (remove-if |
307 | #'(lambda (mapping) (eq (second mapping) nil)) mappings)))) |
308 | `(progn |
309 | (register-type ',type ,(find-type-name type-number)) |
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310 | ,(ecase super |
311 | (enum `(define-enum-type ,type ,@expanded-mappings)) |
312 | (flags `(define-flags-type ,type ,@expanded-mappings)))))) |
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313 | |
314 | |
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315 | (register-derivable-type 'enum "GEnum" 'expand-enum-type) |
316 | (register-derivable-type 'flags "GFlags" 'expand-enum-type) |
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317 | |