0d07716f |
1 | ;; Common Lisp bindings for GTK+ v2.0 |
2 | ;; Copyright (C) 1999-2000 Espen S. Johnsen <espejohn@online.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 | |
18 | ;; $Id: gforeign.lisp,v 1.1 2000/08/14 16:44:38 espen Exp $ |
19 | |
20 | (in-package "GLIB") |
21 | |
22 | ;;;; Type methods |
23 | |
24 | (defvar *type-methods* (make-hash-table)) |
25 | |
26 | (defun ensure-type-method-fun (fname) |
27 | (unless (fboundp fname) |
28 | (setf |
29 | (symbol-function fname) |
30 | #'(lambda (type-spec &rest args) |
31 | (apply |
32 | (find-applicable-type-method type-spec fname) type-spec args))))) |
33 | |
34 | (defmacro define-type-method-fun (fname lambda-list) |
35 | (declare (ignore lambda-list)) |
36 | `(defun ,fname (type-spec &rest args) |
37 | (apply |
38 | (find-applicable-type-method type-spec ',fname) type-spec args))) |
39 | |
40 | |
41 | (defun ensure-type-name (type) |
42 | (etypecase type |
43 | (symbol type) |
44 | (pcl::class (class-name type)))) |
45 | |
46 | (defun add-type-method (type fname function) |
47 | (push |
48 | (cons fname function) |
49 | (gethash (ensure-type-name type) *type-methods*))) |
50 | |
51 | (defun find-type-method (type fname) |
52 | (cdr (assoc fname (gethash (ensure-type-name type) *type-methods*)))) |
53 | |
54 | (defun find-applicable-type-method (type-spec fname &optional (error t)) |
55 | (flet ((find-superclass-method (class) |
56 | (when class |
57 | (dolist (super (cdr (pcl::class-precedence-list class))) |
58 | (return-if (find-type-method super fname))))) |
59 | (find-expanded-type-method (type-spec) |
60 | (multiple-value-bind (expanded-type-spec expanded-p) |
61 | (type-expand-1 type-spec) |
62 | (cond |
63 | (expanded-p |
64 | (find-applicable-type-method expanded-type-spec fname nil)) |
65 | ((neq type-spec t) |
66 | (find-applicable-type-method t fname nil)))))) |
67 | |
68 | (or |
69 | (typecase type-spec |
70 | (pcl::class |
71 | (or |
72 | (find-type-method type-spec fname) |
73 | (find-superclass-method type-spec))) |
74 | (symbol |
75 | (or |
76 | (find-type-method type-spec fname) |
77 | (find-expanded-type-method type-spec) |
78 | (find-superclass-method (find-class type-spec nil)))) |
79 | (cons |
80 | (or |
81 | (find-type-method (first type-spec) fname) |
82 | (find-expanded-type-method type-spec))) |
83 | (t |
84 | (error "Invalid type specifier ~A" type-spec))) |
85 | (and |
86 | error |
87 | (error |
88 | "No applicable method for ~A when called with type specifier ~A" |
89 | fname type-spec))))) |
90 | |
91 | (defmacro deftype-method (fname type lambda-list &body body) |
92 | `(progn |
93 | (ensure-type-method-fun ',fname) |
94 | (add-type-method ',type ',fname #'(lambda ,lambda-list ,@body)) |
95 | ',fname)) |
96 | |
97 | (defmacro deftype (name parameters &body body) |
98 | (destructuring-bind (lisp-name &optional alien-name) (mklist name) |
99 | `(progn |
100 | ,(when alien-name |
101 | `(setf (alien-type-name ',lisp-name) ,alien-name)) |
102 | (lisp:deftype ,lisp-name ,parameters ,@body)))) |
103 | |
104 | ;; To make the compiler shut up |
105 | (eval-when (:compile-toplevel :load-toplevel :execute) |
106 | (define-type-method-fun translate-type-spec (type-spec)) |
107 | (define-type-method-fun translate-to-alien (type-spec expr &optional copy)) |
108 | (define-type-method-fun translate-from-alien (type-spec expr &optional alloc)) |
109 | (define-type-method-fun cleanup-alien (type-spec expr &optional copied))) |
110 | |
111 | |
112 | ;;;; |
113 | |
114 | (defvar *type-function-cache* (make-hash-table :test #'equal)) |
115 | |
116 | (defun get-cached-function (type-spec fname) |
117 | (cdr (assoc fname (gethash type-spec *type-function-cache*)))) |
118 | |
119 | (defun set-cached-function (type-spec fname function) |
120 | (push (cons fname function) (gethash type-spec *type-function-cache*)) |
121 | function) |
122 | |
123 | |
124 | ;; Creates a function to translate an object of the specified type |
125 | ;; from lisp to alien representation. |
126 | (defun get-to-alien-function (type-spec) |
127 | (or |
128 | (get-cached-function type-spec 'to-alien-function) |
129 | (set-cached-function type-spec 'to-alien-function |
130 | (compile |
131 | nil |
132 | `(lambda (object) |
133 | (declare (ignorable object)) |
134 | ,(translate-to-alien type-spec 'object)))))) |
135 | |
136 | ;; and the opposite |
137 | (defun get-from-alien-function (type-spec) |
138 | (or |
139 | (get-cached-function type-spec 'from-alien-function) |
140 | (set-cached-function type-spec 'from-alien-function |
141 | (compile |
142 | nil |
143 | `(lambda (alien) |
144 | (declare (ignorable alien)) |
145 | ,(translate-from-alien type-spec 'alien)))))) |
146 | |
147 | ;; and for cleaning up |
148 | (defun get-cleanup-function (type-spec) |
149 | (or |
150 | (get-cached-function type-spec 'cleanup-function) |
151 | (set-cached-function type-spec 'cleanup-function |
152 | (compile |
153 | nil |
154 | `(lambda (alien) |
155 | (declare (ignorable alien)) |
156 | ,(cleanup-alien type-spec 'alien)))))) |
157 | |
158 | |
159 | |
160 | ;; Creates a function to write an object of the specified type |
161 | ;; to the given memory location |
162 | (defun get-writer-function (type-spec) |
163 | (or |
164 | (get-cached-function type-spec 'writer-function) |
165 | (set-cached-function type-spec 'writer-function |
166 | (compile |
167 | nil |
168 | `(lambda (value sap offset) |
169 | (declare (ignorable value sap offset)) |
170 | (setf |
171 | (,(sap-ref-fname type-spec) sap offset) |
172 | ,(translate-to-alien type-spec 'value :copy))))))) |
173 | |
174 | ;; Creates a function to read an object of the specified type |
175 | ;; from the given memory location |
176 | (defun get-reader-function (type-spec) |
177 | (or |
178 | (get-cached-function type-spec 'reader-function) |
179 | (set-cached-function type-spec 'reader-function |
180 | (compile |
181 | nil |
182 | `(lambda (sap offset) |
183 | (declare (ignorable sap offset)) |
184 | ,(translate-from-alien |
185 | type-spec `(,(sap-ref-fname type-spec) sap offset) :copy)))))) |
186 | |
187 | |
188 | (defun get-destroy-function (type-spec) |
189 | (or |
190 | (get-cached-function type-spec 'destroy-function) |
191 | (set-cached-function type-spec 'destroy-function |
192 | (compile |
193 | nil |
194 | `(lambda (sap offset) |
195 | (declare (ignorable sap offset)) |
196 | ,(cleanup-alien |
197 | type-spec `(,(sap-ref-fname type-spec) sap offset) :copied)))))) |
198 | |
199 | |
200 | |
201 | ;;;; |
202 | |
203 | (defconstant +size-of-int+ 4) |
204 | (defconstant +size-of-sap+ 4) |
205 | (defconstant +size-of-float+ 4) |
206 | (defconstant +size-of-double+ 8) |
207 | |
208 | (defun sap-ref-unsigned (sap offset) |
209 | (sap-ref-32 sap offset)) |
210 | |
211 | (defun sap-ref-signed (sap offset) |
212 | (signed-sap-ref-32 sap offset)) |
213 | |
214 | (defun sap-ref-fname (type-spec) |
215 | (let ((alien-type-spec (mklist (translate-type-spec type-spec)))) |
216 | (ecase (first alien-type-spec) |
217 | (unsigned |
218 | (ecase (second alien-type-spec) |
219 | (8 'sap-ref-8) |
220 | (16 'sap-ref-16) |
221 | (32 'sap-ref-32) |
222 | (64 'sap-ref-64))) |
223 | (signed |
224 | (ecase (second alien-type-spec) |
225 | (8 'signed-sap-ref-8) |
226 | (16 'signed-sap-ref-16) |
227 | (32 'signed-sap-ref-32) |
228 | (64 'signed-sap-ref-64))) |
229 | (system-area-pointer 'sap-ref-sap) |
230 | (single-float 'sap-ref-single) |
231 | (double-float 'sap-ref-double)))) |
232 | |
233 | |
234 | (defun signed (size) |
235 | (if (eq size '*) |
236 | `(signed ,(* 8 +size-of-int+)) |
237 | `(signed ,size))) |
238 | |
239 | (defun unsigned (size) |
240 | (if (eq size '*) |
241 | `(unsigned ,(* 8 +size-of-int+)) |
242 | `(unsigned ,size))) |
243 | |
244 | (defun size-of (type-spec) |
245 | (let ((alien-type-spec (translate-type-spec type-spec))) |
246 | (ecase (first (mklist alien-type-spec)) |
247 | ((signed unsigned) (/ (second alien-type-spec) 8)) |
248 | ((system-area-pointer single-float) +size-of-sap+) |
249 | (single-float +size-of-float+) |
250 | (double-float +size-of-double+)))) |
251 | |
252 | |
253 | ;;;; Foreign function call interface |
254 | |
255 | (defvar *package-prefix* nil) |
256 | |
257 | (defun set-package-prefix (prefix &optional (package *package*)) |
258 | (let ((package (find-package package))) |
259 | (delete-if #'(lambda (assoc) (eq (car assoc) package)) *package-prefix*) |
260 | (push (cons package prefix) *package-prefix*)) |
261 | prefix) |
262 | |
263 | (defun package-prefix (&optional (package *package*)) |
264 | (let ((package (find-package package))) |
265 | (or |
266 | (cdr (assoc package *package-prefix*)) |
267 | (substitute #\_ #\- (string-downcase (package-name package)))))) |
268 | |
269 | (defmacro use-prefix (prefix &optional (package *package*)) |
270 | `(eval-when (:compile-toplevel :load-toplevel :execute) |
271 | (set-package-prefix ,prefix ,package))) |
272 | |
273 | |
274 | (defun default-alien-func-name (lisp-name) |
275 | (let* ((lisp-name-string |
276 | (if (char= (char (the simple-string (string lisp-name)) 0) #\%) |
277 | (subseq (the simple-string (string lisp-name)) 1) |
278 | (string lisp-name))) |
279 | (prefix (package-prefix *package*)) |
280 | (name (substitute #\_ #\- (string-downcase lisp-name-string)))) |
281 | (if (or (not prefix) (string= prefix "")) |
282 | name |
283 | (format nil "~A_~A" prefix name)))) |
284 | |
285 | |
286 | (defmacro define-foreign (name lambda-list return-type-spec &rest docs/args) |
287 | (multiple-value-bind (c-name lisp-name) |
288 | (if (atom name) |
289 | (values (default-alien-func-name name) name) |
290 | (values-list name)) |
291 | (let ((supplied-lambda-list lambda-list) |
292 | (docs nil) |
293 | (args nil)) |
294 | (dolist (doc/arg docs/args) |
295 | (if (stringp doc/arg) |
296 | (push doc/arg docs) |
297 | (progn |
298 | (destructuring-bind (expr type &optional (style :in)) doc/arg |
299 | (unless (member style '(:in :out)) |
300 | (error "Bogus argument style ~S in ~S." style doc/arg)) |
301 | (when (and (not supplied-lambda-list) (namep expr) (eq style :in)) |
302 | (push expr lambda-list)) |
303 | (push |
304 | (list (if (namep expr) expr (gensym)) expr type style) args))))) |
305 | |
306 | (%define-foreign |
307 | c-name lisp-name (or supplied-lambda-list (nreverse lambda-list)) |
308 | return-type-spec (reverse docs) (reverse args))))) |
309 | |
310 | |
311 | #+cmu |
312 | (defun %define-foreign (foreign-name lisp-name lambda-list |
313 | return-type-spec docs args) |
314 | (ext:collect ((alien-types) (alien-bindings) (alien-parameters) |
315 | (alien-values) (alien-deallocatiors)) |
316 | (dolist (arg args) |
317 | (destructuring-bind (var expr type-spec style) arg |
318 | (let ((declaration (translate-type-spec type-spec)) |
319 | (deallocation (cleanup-alien type-spec expr))) |
320 | (cond |
321 | ((eq style :out) |
322 | (alien-types `(* ,declaration)) |
323 | (alien-parameters `(addr ,var)) |
324 | (alien-bindings `(,var ,declaration)) |
325 | (alien-values (translate-from-alien type-spec var))) |
326 | (deallocation |
327 | (alien-types declaration) |
328 | (alien-bindings |
329 | `(,var ,declaration ,(translate-to-alien type-spec expr))) |
330 | (alien-parameters var) |
331 | (alien-deallocatiors deallocation)) |
332 | (t |
333 | (alien-types declaration) |
334 | (alien-parameters (translate-to-alien type-spec expr))))))) |
335 | |
336 | (let ((alien-funcall `(alien-funcall ,lisp-name ,@(alien-parameters)))) |
337 | `(defun ,lisp-name ,lambda-list |
338 | ,@docs |
339 | (with-alien ((,lisp-name |
340 | (function |
341 | ,(translate-type-spec return-type-spec) |
342 | ,@(alien-types)) |
343 | :extern ,foreign-name) |
344 | ,@(alien-bindings)) |
345 | ,(if return-type-spec |
346 | `(let ((result |
347 | ,(translate-from-alien return-type-spec alien-funcall))) |
348 | ,@(alien-deallocatiors) |
349 | (values result ,@(alien-values))) |
350 | `(progn |
351 | ,alien-funcall |
352 | ,@(alien-deallocatiors) |
353 | (values ,@(alien-values))))))))) |
354 | |
355 | |
356 | |
357 | |
358 | ;;;; Translations for fundamental types |
359 | |
360 | (lisp:deftype long (&optional (min '*) (max '*)) `(integer ,min ,max)) |
361 | (lisp:deftype unsigned-long (&optional (min '*) (max '*)) `(integer ,min ,max)) |
362 | (lisp:deftype int (&optional (min '*) (max '*)) `(long ,min ,max)) |
363 | (lisp:deftype unsigned-int (&optional (min '*) (max '*)) `(unsigned-long ,min ,max)) |
364 | (lisp:deftype short (&optional (min '*) (max '*)) `(int ,min ,max)) |
365 | (lisp:deftype unsigned-short (&optional (min '*) (max '*)) `(unsigned-int ,min ,max)) |
366 | (lisp:deftype signed (&optional (size '*)) `(signed-byte ,size)) |
367 | (lisp:deftype unsigned (&optional (size '*)) `(signed-byte ,size)) |
368 | (lisp:deftype char () 'base-char) |
369 | (lisp:deftype pointer () 'system-area-pointer) |
370 | (lisp:deftype boolean (&optional (size '*)) |
371 | (declare (ignore size)) |
372 | `(member t nil)) |
373 | (lisp:deftype static (type) type) |
374 | (lisp:deftype invalid () nil) |
375 | |
376 | |
377 | (deftype-method cleanup-alien t (type-spec alien &optional copied) |
378 | (declare (ignore type-spec alien copied)) |
379 | nil) |
380 | |
381 | |
382 | (deftype-method translate-to-alien integer (type-spec number &optional copy) |
383 | (declare (ignore type-spec copy)) |
384 | number) |
385 | |
386 | (deftype-method translate-from-alien integer (type-spec number &optional alloc) |
387 | (declare (ignore type-spec alloc)) |
388 | number) |
389 | |
390 | |
391 | (deftype-method translate-type-spec fixnum (type-spec) |
392 | (declare (ignore type-spec)) |
393 | (signed '*)) |
394 | |
395 | (deftype-method translate-to-alien fixnum (type-spec number &optional copy) |
396 | (declare (ignore type-spec copy)) |
397 | number) |
398 | |
399 | (deftype-method translate-from-alien fixnum (type-spec number &optional alloc) |
400 | (declare (ignore type-spec alloc)) |
401 | number) |
402 | |
403 | |
404 | (deftype-method translate-type-spec long (type-spec) |
405 | (declare (ignore type-spec)) |
406 | (signed '*)) |
407 | |
408 | |
409 | (deftype-method translate-type-spec unsigned-long (type-spec) |
410 | (declare (ignore type-spec)) |
411 | (unsigned '*)) |
412 | |
413 | |
414 | (deftype-method translate-type-spec short (type-spec) |
415 | (declare (ignore type-spec)) |
416 | '(signed 16)) |
417 | |
418 | |
419 | (deftype-method translate-type-spec unsigned-short (type-spec) |
420 | (declare (ignore type-spec)) |
421 | '(unsigned 16)) |
422 | |
423 | |
424 | (deftype-method translate-type-spec signed-byte (type-spec) |
425 | (destructuring-bind (name &optional (size '*)) |
426 | (type-expand-to 'signed-byte type-spec) |
427 | (declare (ignore name)) |
428 | (signed size))) |
429 | |
430 | (deftype-method translate-to-alien signed-byte (type-spec number &optional copy) |
431 | (declare (ignore type-spec copy)) |
432 | number) |
433 | |
434 | (deftype-method |
435 | translate-from-alien signed-byte (type-spec number &optional alloc) |
436 | (declare (ignore type-spec alloc)) |
437 | number) |
438 | |
439 | |
440 | (deftype-method translate-type-spec unsigned-byte (type-spec) |
441 | (destructuring-bind (name &optional (size '*)) |
442 | (type-expand-to 'unsigned-byte type-spec) |
443 | (declare (ignore name)) |
444 | (unsigned size))) |
445 | |
446 | (deftype-method |
447 | translate-to-alien unsigned-byte (type-spec number &optional copy) |
448 | (declare (ignore type-spec copy)) |
449 | number) |
450 | |
451 | (deftype-method |
452 | translate-from-alien unsigned-byte (type-spec number &optional alloc) |
453 | (declare (ignore type-spec alloc)) |
454 | number) |
455 | |
456 | |
457 | (deftype-method translate-type-spec single-float (type-spec) |
458 | (declare (ignore type-spec)) |
459 | 'single-float) |
460 | |
461 | (deftype-method |
462 | translate-to-alien single-float (type-spec number &optional copy) |
463 | (declare (ignore type-spec copy)) |
464 | number) |
465 | |
466 | (deftype-method |
467 | translate-from-alien single-float (type-spec number &optional alloc) |
468 | (declare (ignore type-spec alloc)) |
469 | number) |
470 | |
471 | |
472 | (deftype-method translate-type-spec double-float (type-spec) |
473 | (declare (ignore type-spec)) |
474 | 'double-float) |
475 | |
476 | (deftype-method |
477 | translate-to-alien double-float (type-spec number &optional copy) |
478 | (declare (ignore type-spec copy)) |
479 | number) |
480 | |
481 | (deftype-method |
482 | translate-from-alien double-float (type-spec number &optional alloc) |
483 | (declare (ignore type-spec alloc)) |
484 | number) |
485 | |
486 | |
487 | (deftype-method translate-type-spec base-char (type-spec) |
488 | (declare (ignore type-spec)) |
489 | '(unsigned 8)) |
490 | |
491 | (deftype-method translate-to-alien base-char (type-spec char &optional copy) |
492 | (declare (ignore type-spec copy)) |
493 | `(char-code ,char)) |
494 | |
495 | (deftype-method translate-from-alien base-char (type-spec code &optional alloc) |
496 | (declare (ignore type-spec alloc)) |
497 | `(code-char ,code)) |
498 | |
499 | |
500 | (deftype-method translate-type-spec string (type-spec) |
501 | (declare (ignore type-spec)) |
502 | 'system-area-pointer) |
503 | |
504 | (deftype-method translate-to-alien string (type-spec string &optional copy) |
505 | (declare (ignore type-spec)) |
506 | (if copy |
507 | `(let ((string ,string)) |
508 | (copy-memory |
509 | (make-pointer (1+ (kernel:get-lisp-obj-address string))) |
510 | (1+ (length string)))) |
511 | `(make-pointer (1+ (kernel:get-lisp-obj-address ,string))))) |
512 | |
513 | (deftype-method |
514 | translate-from-alien string (type-spec sap &optional (alloc :dynamic)) |
515 | (declare (ignore type-spec)) |
516 | `(let ((sap ,sap)) |
517 | (unless (null-pointer-p sap) |
518 | (prog1 |
519 | (c-call::%naturalize-c-string sap) |
520 | ,(when (eq alloc :dynamic) `(deallocate-memory ,sap)))))) |
521 | |
522 | (deftype-method cleanup-alien string (type-spec sap &optional copied) |
523 | (declare (ignore type-spec)) |
524 | (when copied |
525 | `(let ((sap ,sap)) |
526 | (unless (null-pointer-p sap) |
527 | (deallocate-memory sap))))) |
528 | |
529 | |
530 | (deftype-method translate-type-spec boolean (type-spec) |
531 | (if (atom type-spec) |
532 | (unsigned '*) |
533 | (destructuring-bind (name &optional (size '*)) |
534 | (type-expand-to 'boolean type-spec) |
535 | (declare (ignore name)) |
536 | (unsigned size)))) |
537 | |
538 | (deftype-method translate-to-alien boolean (type-spec boolean &optional copy) |
539 | (declare (ignore type-spec copy)) |
540 | `(if ,boolean 1 0)) |
541 | |
542 | (deftype-method translate-from-alien boolean (type-spec int &optional alloc) |
543 | (declare (ignore type-spec alloc)) |
544 | `(not (zerop ,int))) |
545 | |
546 | |
547 | (deftype-method translate-type-spec or (union-type-spec) |
548 | (destructuring-bind (name &rest type-specs) |
549 | (type-expand-to 'or union-type-spec) |
550 | (declare (ignore name)) |
551 | (let ((type-spec-translations |
552 | (map 'list #'translate-type-spec type-specs))) |
553 | (unless (apply #'all-equal type-spec-translations) |
554 | (error |
555 | "No common alien type specifier for union type: ~A" union-type-spec)) |
556 | (first type-spec-translations)))) |
557 | |
558 | (deftype-method translate-to-alien or (union-type-spec expr &optional copy) |
559 | (destructuring-bind (name &rest type-specs) |
560 | (type-expand-to 'or union-type-spec) |
561 | (declare (ignore name)) |
562 | `(let ((value ,expr)) |
563 | (etypecase value |
564 | ,@(map |
565 | 'list |
566 | #'(lambda (type-spec) |
567 | (list type-spec (translate-to-alien type-spec 'value copy))) |
568 | type-specs))))) |
569 | |
570 | |
571 | |
572 | (deftype-method translate-type-spec system-area-pointer (type-spec) |
573 | (declare (ignore type-spec)) |
574 | 'system-area-pointer) |
575 | |
576 | (deftype-method |
577 | translate-to-alien system-area-pointer (type-spec sap &optional copy) |
578 | (declare (ignore type-spec copy)) |
579 | sap) |
580 | |
581 | (deftype-method |
582 | translate-from-alien system-area-pointer (type-spec sap &optional alloc) |
583 | (declare (ignore type-spec alloc)) |
584 | sap) |
585 | |
586 | |
587 | (deftype-method translate-type-spec null (type-spec) |
588 | (declare (ignore type-spec)) |
589 | 'system-area-pointer) |
590 | |
591 | (deftype-method translate-to-alien null (type-spec expr &optional copy) |
592 | (declare (ignore type-spec copy)) |
593 | `(make-pointer 0)) |
594 | |
595 | |
596 | (deftype-method translate-type-spec nil (type-spec) |
597 | (declare (ignore type-spec)) |
598 | 'void) |
599 | |
600 | |
601 | (deftype-method transalte-type-spec static (type-spec) |
602 | (translate-type-spec (second type-spec))) |
603 | |
604 | (deftype-method translate-to-alien static (type-spec expr &optional copy) |
605 | (declare (ignore copy)) |
606 | (translate-to-alien (second type-spec) expr nil)) |
607 | |
608 | (deftype-method translate-from-alien static (type-spec alien &optional alloc) |
609 | (declare (ignore alloc)) |
610 | (translate-from-alien (second type-spec) alien nil)) |
611 | |
612 | (deftype-method cleanup-alien static (type-spec alien &optional copied) |
613 | (declare (ignore copied)) |
614 | (cleanup-alien type-spec alien nil)) |
615 | |
616 | |
617 | |
618 | ;;;; Enum and flags type |
619 | |
620 | (defun map-mappings (args op) |
621 | (let ((current-value 0)) |
622 | (map |
623 | 'list |
624 | #'(lambda (mapping) |
625 | (destructuring-bind (symbol &optional (value current-value)) |
626 | (mklist mapping) |
627 | (setf current-value (1+ value)) |
628 | (case op |
629 | (:enum-int (list symbol value)) |
630 | (:flags-int (list symbol (ash 1 value))) |
631 | (:int-enum (list value symbol)) |
632 | (:int-flags (list (ash 1 value) symbol)) |
633 | (:symbols symbol)))) |
634 | (if (integerp (first args)) |
635 | (rest args) |
636 | args)))) |
637 | |
638 | (lisp:deftype enum (&rest args) |
639 | `(member ,@(map-mappings args :symbols))) |
640 | |
641 | (deftype-method translate-type-spec enum (type-spec) |
642 | (destructuring-bind (name &rest args) (type-expand-to 'enum type-spec) |
643 | (declare (ignore name)) |
644 | (if (integerp (first args)) |
645 | `(signed ,(first args)) |
646 | '(signed 32)))) |
647 | |
648 | (deftype-method translate-to-alien enum (type-spec expr &optional copy) |
649 | (declare (ignore copy)) |
650 | (destructuring-bind (name &rest args) (type-expand-to 'enum type-spec) |
651 | (declare (ignore name)) |
652 | `(ecase ,expr |
653 | ,@(map-mappings args :enum-int)))) |
654 | |
655 | (deftype-method translate-from-alien enum (type-spec expr &optional alloc) |
656 | (declare (ignore alloc)) |
657 | (destructuring-bind (name &rest args) (type-expand-to 'enum type-spec) |
658 | (declare (ignore name)) |
659 | `(ecase ,expr |
660 | ,@(map-mappings args :int-enum)))) |
661 | |
662 | |
663 | (lisp:deftype flags (&rest args) |
664 | `(or |
665 | null |
666 | (cons |
667 | (member ,@(map-mappings args :symbols)) |
668 | list))) |
669 | |
670 | (deftype-method translate-type-spec flags (type-spec) |
671 | (destructuring-bind (name &rest args) (type-expand-to 'flags type-spec) |
672 | (declare (ignore name)) |
673 | (if (integerp (first args)) |
674 | `(signed ,(first args)) |
675 | '(signed 32)))) |
676 | |
677 | (deftype-method translate-to-alien flags (type-spec expr &optional copy) |
678 | (declare (ignore copy)) |
679 | (destructuring-bind (name &rest args) (type-expand-to 'flags type-spec) |
680 | (declare (ignore name)) |
681 | (let ((mappings (map-mappings args :flags-int))) |
682 | `(let ((value 0)) |
683 | (dolist (flag ,expr value) |
684 | (setq value (logior value (second (assoc flag ',mappings))))))))) |
685 | |
686 | (deftype-method translate-from-alien flags (type-spec expr &optional alloc) |
687 | (declare (ignore alloc)) |
688 | (destructuring-bind (name &rest args) (type-expand-to 'flags type-spec) |
689 | (declare (ignore name)) |
690 | (let ((mappings (map-mappings args :int-flags))) |
691 | `(let ((result nil)) |
692 | (dolist (mapping ',mappings result) |
693 | (unless (zerop (logand ,expr (first mapping))) |
694 | (push (second mapping) result))))))) |