1 ;; Common Lisp bindings for GTK+ v2.x
2 ;; Copyright 1999-2005 Espen S. Johnsen <espen@users.sf.net>
4 ;; Permission is hereby granted, free of charge, to any person obtaining
5 ;; a copy of this software and associated documentation files (the
6 ;; "Software"), to deal in the Software without restriction, including
7 ;; without limitation the rights to use, copy, modify, merge, publish,
8 ;; distribute, sublicense, and/or sell copies of the Software, and to
9 ;; permit persons to whom the Software is furnished to do so, subject to
10 ;; the following conditions:
12 ;; The above copyright notice and this permission notice shall be
13 ;; included in all copies or substantial portions of the Software.
15 ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 ;; $Id: ffi.lisp,v 1.21 2005-09-26 21:27:31 espen Exp $
28 ;;;; Foreign function call interface
30 (defvar *package-prefix* nil)
32 (defun set-package-prefix (prefix &optional (package *package*))
33 (let ((package (find-package package)))
34 (delete-if #'(lambda (assoc) (eq (car assoc) package)) *package-prefix*)
35 (push (cons package prefix) *package-prefix*))
38 (defun package-prefix (&optional (package *package*))
39 (let ((package (find-package package)))
41 (cdr (assoc package *package-prefix*))
42 (substitute #\_ #\- (string-downcase (package-name package))))))
44 (defun find-prefix-package (prefix)
46 (car (rassoc (string-downcase prefix) *package-prefix* :test #'string=))
47 (find-package (string-upcase prefix))))
49 (defmacro use-prefix (prefix &optional (package *package*))
50 `(eval-when (:compile-toplevel :load-toplevel :execute)
51 (set-package-prefix ,prefix ,package)))
54 (defun default-alien-fname (lisp-name)
55 (let* ((name (substitute #\_ #\- (string-downcase lisp-name)))
59 (char= (char name 0) #\%)
60 (string= "_p" name :start2 (- (length name) 2)))
61 (subseq name 1 (- (length name) 2)))
62 ((char= (char name 0) #\%)
64 ((string= "_p" name :start2 (- (length name) 2))
65 (subseq name 0 (- (length name) 2)))
67 (prefix (package-prefix *package*)))
68 (if (or (not prefix) (string= prefix ""))
70 (format nil "~A_~A" prefix stripped-name))))
72 (defun default-alien-type-name (type-name)
73 (let ((prefix (package-prefix *package*)))
79 (cons prefix (split-string (symbol-name type-name) #\-))))))
81 (defun default-type-name (alien-name)
85 (split-string-if alien-name #'upper-case-p))))
88 (rest parts) #\-) (find-prefix-package (first parts)))))
91 (defmacro defbinding (name lambda-list return-type &rest docs/args)
92 (multiple-value-bind (lisp-name c-name)
94 (values name (default-alien-fname name))
97 (let ((supplied-lambda-list lambda-list)
100 (dolist (doc/arg docs/args)
101 (if (stringp doc/arg)
104 (destructuring-bind (expr type &optional (style :in)) doc/arg
105 (unless (member style '(:in :out :in-out :return))
106 (error "Bogus argument style ~S in ~S." style doc/arg))
108 (not supplied-lambda-list)
109 (namep expr) (member style '(:in :in-out :return)))
110 (push expr lambda-list))
112 ((and (namep expr) (eq style :out)) expr)
113 ((namep expr) (make-symbol (string expr)))
115 expr (mklist type) style) args)))))
118 c-name lisp-name (or supplied-lambda-list (nreverse lambda-list))
119 return-type (reverse docs) (reverse args)))))
122 (defun %defbinding (foreign-name lisp-name lambda-list return-type docs args)
123 (collect ((alien-types) (alien-bindings) (alien-parameters)
124 (return-values) (cleanup-forms))
126 (destructuring-bind (var expr type style) arg
127 (let ((declaration (alien-type type))
128 (cleanup (cleanup-form var type)))
131 ((member style '(:out :in-out))
132 (alien-types `(* ,declaration))
133 (alien-parameters `(addr ,var))
137 ((eq style :in-out) (list (to-alien-form expr type)))
138 ((eq declaration 'system-area-pointer)
139 (list '(make-pointer 0))))))
140 (return-values (from-alien-form var type)))
142 (alien-types declaration)
144 `(,var ,declaration ,(to-alien-form expr type)))
145 (alien-parameters var)
146 (return-values (from-alien-form var type)))
148 (alien-types declaration)
150 `(,var ,declaration ,(to-alien-form expr type)))
151 (alien-parameters var)
152 (cleanup-forms cleanup))
154 (alien-types declaration)
155 (alien-parameters (to-alien-form expr type)))))))
157 (let* ((alien-name (make-symbol (string lisp-name)))
158 (alien-funcall `(alien-funcall ,alien-name ,@(alien-parameters))))
159 `(defun ,lisp-name ,lambda-list
161 #+cmu(declare (optimize (inhibit-warnings 3)))
162 #+sbcl(declare (muffle-conditions compiler-note))
163 (with-alien ((,alien-name
165 ,(alien-type return-type)
167 :extern ,foreign-name)
172 ,(from-alien-form alien-funcall return-type)
179 (values ,@(return-values)))))))))
182 ;;; Creates bindings at runtime
183 (defun mkbinding (name return-type &rest arg-types)
184 #+cmu(declare (optimize (inhibit-warnings 3)))
185 #+sbcl(declare (muffle-conditions compiler-note))
187 `(function ,@(mapcar #'alien-type (cons return-type arg-types))))
190 (make-heap-alien-info
191 :type (parse-alien-type ftype #+sbcl nil)
192 :sap-form (let ((address (foreign-symbol-address name)))
194 (integer (int-sap address))
195 (system-area-pointer address))))))
196 (translate-arguments (mapcar #'to-alien-function arg-types))
197 (translate-return-value (from-alien-function return-type))
198 (cleanup-arguments (mapcar #'cleanup-function arg-types)))
200 #'(lambda (&rest args)
201 (map-into args #'funcall translate-arguments args)
203 (funcall translate-return-value
204 (apply #'alien-funcall alien args))
205 (mapc #'funcall cleanup-arguments args)))))
208 (defmacro defcallback (name (return-type &rest args) &body body)
209 (let ((def-callback #+cmu'alien:def-callback
210 #+sbcl'sb-alien:define-alien-function))
211 `(,def-callback ,name
212 (,(alien-type return-type)
213 ,@(mapcar #'(lambda (arg)
214 (destructuring-bind (name type) arg
215 `(,name ,(alien-type type))))
219 (mapcar #'(lambda (arg)
220 (destructuring-bind (name type) arg
222 (from-alien-form name type)))
223 (unless (eq name from-alien)
224 `(,name ,from-alien)))))
231 (sb-alien:alien-function-sap af))
234 (deftype callback () 'sb-alien:alien-function)
236 ;;;; Definitons and translations of fundamental types
238 (defmacro def-type-method (name args &optional documentation)
240 (defgeneric ,name (,@args type &rest args)
241 ,@(when documentation `((:documentation ,documentation))))
242 (defmethod ,name (,@args (type symbol) &rest args)
243 (let ((class (find-class type nil)))
245 (apply #',name ,@args class args)
246 (multiple-value-bind (super-type expanded-p)
247 (type-expand-1 (cons type args))
249 (,name ,@args super-type)
250 (call-next-method))))))
251 (defmethod ,name (,@args (type cons) &rest args)
252 (declare (ignore args))
253 (apply #',name ,@args (first type) (rest type)))))
256 (def-type-method alien-type ())
257 (def-type-method size-of ())
258 (def-type-method to-alien-form (form))
259 (def-type-method from-alien-form (form))
260 (def-type-method cleanup-form (form)
261 "Creates a form to clean up after the alien call has finished.")
263 (def-type-method to-alien-function ())
264 (def-type-method from-alien-function ())
265 (def-type-method cleanup-function ())
267 (def-type-method copy-to-alien-form (form))
268 (def-type-method copy-to-alien-function ())
269 (def-type-method copy-from-alien-form (form))
270 (def-type-method copy-from-alien-function ())
272 (def-type-method writer-function ())
273 (def-type-method reader-function ())
274 (def-type-method destroy-function ())
276 (def-type-method unbound-value ()
277 "First return value is true if the type has an unbound value, second return value is the actual unbound value")
280 ;; Sizes of fundamental C types in bytes (8 bits)
281 (defconstant +size-of-short+ 2)
282 (defconstant +size-of-int+ 4)
283 (defconstant +size-of-long+ 4)
284 (defconstant +size-of-pointer+ 4)
285 (defconstant +size-of-float+ 4)
286 (defconstant +size-of-double+ 8)
288 ;; Sizes of fundamental C types in bits
289 (defconstant +bits-of-byte+ 8)
290 (defconstant +bits-of-short+ 16)
291 (defconstant +bits-of-int+ 32)
292 (defconstant +bits-of-long+ 32)
295 (deftype int () '(signed-byte #.+bits-of-int+))
296 (deftype unsigned-int () '(unsigned-byte #.+bits-of-int+))
297 (deftype long () '(signed-byte #.+bits-of-long+))
298 (deftype unsigned-long () '(unsigned-byte #.+bits-of-long+))
299 (deftype short () '(signed-byte #.+bits-of-short+))
300 (deftype unsigned-short () '(unsigned-byte #.+bits-of-short+))
301 (deftype signed (&optional (size '*)) `(signed-byte ,size))
302 (deftype unsigned (&optional (size '*)) `(unsigned-byte ,size))
303 (deftype char () 'base-char)
304 (deftype pointer () 'system-area-pointer)
305 (deftype boolean (&optional (size '*)) (declare (ignore size)) `(member t nil))
306 ;(deftype invalid () nil)
309 (defmethod to-alien-form (form (type t) &rest args)
310 (declare (ignore type args))
313 (defmethod to-alien-function ((type t) &rest args)
314 (declare (ignore type args))
317 (defmethod from-alien-form (form (type t) &rest args)
318 (declare (ignore type args))
321 (defmethod from-alien-function ((type t) &rest args)
322 (declare (ignore type args))
325 (defmethod cleanup-form (form (type t) &rest args)
326 (declare (ignore form type args))
329 (defmethod cleanup-function ((type t) &rest args)
330 (declare (ignore type args))
333 (defmethod destroy-function ((type t) &rest args)
334 (declare (ignore type args))
335 #'(lambda (location &optional offset)
336 (declare (ignore location offset))))
338 (defmethod copy-to-alien-form (form (type t) &rest args)
339 (apply #'to-alien-form form type args))
341 (defmethod copy-to-alien-function ((type t) &rest args)
342 (apply #'to-alien-function type args))
344 (defmethod copy-from-alien-form (form (type t) &rest args)
345 (apply #'from-alien-form form type args))
347 (defmethod copy-from-alien-function ((type t) &rest args)
348 (apply #'from-alien-function type args))
351 (defmethod alien-type ((type (eql 'signed-byte)) &rest args)
352 (declare (ignore type))
353 (destructuring-bind (&optional (size '*)) args
355 (#.+bits-of-byte+ #+cmu'(alien:signed 8) #+sbcl'(sb-alien:signed 8))
356 (#.+bits-of-short+ #+cmu 'c-call:short #+sbcl 'sb-alien:short)
357 ((* #.+bits-of-int+) #+cmu 'c-call:int #+sbcl 'sb-alien:int)
358 (#.+bits-of-long+ #+cmu 'c-call:long #+sbcl 'sb-alien:long))))
360 (defmethod size-of ((type (eql 'signed-byte)) &rest args)
361 (declare (ignore type))
362 (destructuring-bind (&optional (size '*)) args
365 (#.+bits-of-short+ +size-of-short+)
366 ((* #.+bits-of-int+) +size-of-int+)
367 (#.+bits-of-long+ +size-of-long+))))
369 (defmethod unbound-value ((type t) &rest args)
370 (declare (ignore type args))
373 (defmethod writer-function ((type (eql 'signed-byte)) &rest args)
374 (declare (ignore type))
375 (destructuring-bind (&optional (size '*)) args
376 (let ((size (if (eq size '*) +bits-of-int+ size)))
378 (8 #'(lambda (value location &optional (offset 0))
379 (setf (signed-sap-ref-8 location offset) value)))
380 (16 #'(lambda (value location &optional (offset 0))
381 (setf (signed-sap-ref-16 location offset) value)))
382 (32 #'(lambda (value location &optional (offset 0))
383 (setf (signed-sap-ref-32 location offset) value)))
384 (64 #'(lambda (value location &optional (offset 0))
385 (setf (signed-sap-ref-64 location offset) value)))))))
387 (defmethod reader-function ((type (eql 'signed-byte)) &rest args)
388 (declare (ignore type))
389 (destructuring-bind (&optional (size '*)) args
390 (let ((size (if (eq size '*) +bits-of-int+ size)))
392 (8 #'(lambda (sap &optional (offset 0))
393 (signed-sap-ref-8 sap offset)))
394 (16 #'(lambda (sap &optional (offset 0))
395 (signed-sap-ref-16 sap offset)))
396 (32 #'(lambda (sap &optional (offset 0))
397 (signed-sap-ref-32 sap offset)))
398 (64 #'(lambda (sap &optional (offset 0))
399 (signed-sap-ref-64 sap offset)))))))
401 (defmethod alien-type ((type (eql 'unsigned-byte)) &rest args)
402 (destructuring-bind (&optional (size '*)) args
404 (#.+bits-of-byte+ #+cmu'(alien:unsigned 8) #+sbcl'(sb-alien:unsigned 8))
405 (#.+bits-of-short+ #+cmu 'c-call:unsigned-short
406 #+sbcl 'sb-alien:unsigned-short)
407 ((* #.+bits-of-int+) #+cmu 'c-call:unsigned-int
408 #+sbcl 'sb-alien:unsigned-int)
409 (#.+bits-of-long+ #+cmu 'c-call:unsigned-long
410 #+sbcl 'sb-alien:unsigned-long))))
412 (defmethod size-of ((type (eql 'unsigned-byte)) &rest args)
413 (apply #'size-of 'signed args))
415 (defmethod writer-function ((type (eql 'unsigned-byte)) &rest args)
416 (declare (ignore type))
417 (destructuring-bind (&optional (size '*)) args
418 (let ((size (if (eq size '*) +bits-of-int+ size)))
420 (8 #'(lambda (value location &optional (offset 0))
421 (setf (sap-ref-8 location offset) value)))
422 (16 #'(lambda (value location &optional (offset 0))
423 (setf (sap-ref-16 location offset) value)))
424 (32 #'(lambda (value location &optional (offset 0))
425 (setf (sap-ref-32 location offset) value)))
426 (64 #'(lambda (value location &optional (offset 0))
427 (setf (sap-ref-64 location offset) value)))))))
429 (defmethod reader-function ((type (eql 'unsigned-byte)) &rest args)
430 (declare (ignore type))
431 (destructuring-bind (&optional (size '*)) args
432 (let ((size (if (eq size '*) +bits-of-int+ size)))
434 (8 #'(lambda (sap &optional (offset 0))
435 (sap-ref-8 sap offset)))
436 (16 #'(lambda (sap &optional (offset 0))
437 (sap-ref-16 sap offset)))
438 (32 #'(lambda (sap &optional (offset 0))
439 (sap-ref-32 sap offset)))
440 (64 #'(lambda (sap &optional (offset 0))
441 (sap-ref-64 sap offset)))))))
444 (defmethod alien-type ((type (eql 'integer)) &rest args)
445 (declare (ignore type args))
446 (alien-type 'signed-byte))
448 (defmethod size-of ((type (eql 'integer)) &rest args)
449 (declare (ignore type args))
450 (size-of 'signed-byte))
452 (defmethod writer-function ((type (eql 'integer)) &rest args)
453 (declare (ignore type args))
454 (writer-function 'signed-byte))
456 (defmethod reader-function ((type (eql 'integer)) &rest args)
457 (declare (ignore type args))
458 (reader-function 'signed-byte))
461 (defmethod alien-type ((type (eql 'fixnum)) &rest args)
462 (declare (ignore type args))
463 (alien-type 'signed-byte))
465 (defmethod size-of ((type (eql 'fixnum)) &rest args)
466 (declare (ignore type args))
467 (size-of 'signed-byte))
470 (defmethod alien-type ((type (eql 'single-float)) &rest args)
471 (declare (ignore type args))
472 #+cmu 'alien:single-float #+sbcl 'sb-alien:single-float)
474 (defmethod size-of ((type (eql 'single-float)) &rest args)
475 (declare (ignore type args))
478 (defmethod to-alien-form (form (type (eql 'single-float)) &rest args)
479 (declare (ignore type args))
480 `(coerce ,form 'single-float))
482 (defmethod to-alien-function ((type (eql 'single-float)) &rest args)
483 (declare (ignore type args))
485 (coerce number 'single-float)))
487 (defmethod writer-function ((type (eql 'single-float)) &rest args)
488 (declare (ignore type args))
489 #'(lambda (value location &optional (offset 0))
490 (setf (sap-ref-single location offset) (coerce value 'single-float))))
492 (defmethod reader-function ((type (eql 'single-float)) &rest args)
493 (declare (ignore type args))
494 #'(lambda (sap &optional (offset 0))
495 (sap-ref-single sap offset)))
498 (defmethod alien-type ((type (eql 'double-float)) &rest args)
499 (declare (ignore type args))
500 #+cmu 'alien:double-float #+sbcl 'sb-alien:double-float)
502 (defmethod size-of ((type (eql 'double-float)) &rest args)
503 (declare (ignore type args))
506 (defmethod to-alien-form (form (type (eql 'double-float)) &rest args)
507 (declare (ignore type args))
508 `(coerce ,form 'double-float))
510 (defmethod to-alien-function ((type (eql 'double-float)) &rest args)
511 (declare (ignore type args))
513 (coerce number 'double-float)))
515 (defmethod writer-function ((type (eql 'double-float)) &rest args)
516 (declare (ignore type args))
517 #'(lambda (value location &optional (offset 0))
518 (setf (sap-ref-double location offset) (coerce value 'double-float))))
520 (defmethod reader-function ((type (eql 'double-float)) &rest args)
521 (declare (ignore type args))
522 #'(lambda (sap &optional (offset 0))
523 (sap-ref-double sap offset)))
526 (defmethod alien-type ((type (eql 'base-char)) &rest args)
527 (declare (ignore type args))
528 #+cmu 'c-call:char #+sbcl 'sb-alien:char)
530 (defmethod size-of ((type (eql 'base-char)) &rest args)
531 (declare (ignore type args))
534 (defmethod writer-function ((type (eql 'base-char)) &rest args)
535 (declare (ignore type args))
536 #'(lambda (char location &optional (offset 0))
537 (setf (sap-ref-8 location offset) (char-code char))))
539 (defmethod reader-function ((type (eql 'base-char)) &rest args)
540 (declare (ignore type args))
541 #'(lambda (location &optional (offset 0))
542 (code-char (sap-ref-8 location offset))))
545 (defmethod alien-type ((type (eql 'string)) &rest args)
546 (declare (ignore type args))
547 (alien-type 'pointer))
549 (defmethod size-of ((type (eql 'string)) &rest args)
550 (declare (ignore type args))
553 (defmethod to-alien-form (string (type (eql 'string)) &rest args)
554 (declare (ignore type args))
555 `(let ((string ,string))
556 ;; Always copy strings to prevent seg fault due to GC
559 (vector-sap (coerce string 'simple-base-string))
560 (1+ (length string)))
562 (let ((utf8 (%deport-utf8-string string)))
563 (copy-memory (vector-sap utf8) (length utf8)))))
565 (defmethod to-alien-function ((type (eql 'string)) &rest args)
566 (declare (ignore type args))
570 (vector-sap (coerce string 'simple-base-string))
571 (1+ (length string)))
573 (let ((utf8 (%deport-utf8-string string)))
574 (copy-memory (vector-sap utf8) (length utf8)))))
576 (defmethod from-alien-form (string (type (eql 'string)) &rest args)
577 (declare (ignore type args))
578 `(let ((string ,string))
579 (unless (null-pointer-p string)
581 #+cmu(%naturalize-c-string string)
582 #+sbcl(%naturalize-utf8-string string)
583 (deallocate-memory string)))))
585 (defmethod from-alien-function ((type (eql 'string)) &rest args)
586 (declare (ignore type args))
588 (unless (null-pointer-p string)
590 #+cmu(%naturalize-c-string string)
591 #+sbcl(%naturalize-utf8-string string)
592 (deallocate-memory string)))))
594 (defmethod cleanup-form (string (type (eql 'string)) &rest args)
595 (declare (ignore type args))
596 `(let ((string ,string))
597 (unless (null-pointer-p string)
598 (deallocate-memory string))))
600 (defmethod cleanup-function ((type (eql 'string)) &rest args)
601 (declare (ignore args))
603 (unless (null-pointer-p string)
604 (deallocate-memory string))))
606 (defmethod copy-from-alien-form (string (type (eql 'string)) &rest args)
607 (declare (ignore type args))
608 `(let ((string ,string))
609 (unless (null-pointer-p string)
610 #+cmu(%naturalize-c-string string)
611 #+sbcl(%naturalize-utf8-string string))))
613 (defmethod copy-from-alien-function ((type (eql 'string)) &rest args)
614 (declare (ignore type args))
616 (unless (null-pointer-p string)
617 #+cmu(%naturalize-c-string string)
618 #+sbcl(%naturalize-utf8-string string))))
620 (defmethod writer-function ((type (eql 'string)) &rest args)
621 (declare (ignore type args))
622 #'(lambda (string location &optional (offset 0))
623 (assert (null-pointer-p (sap-ref-sap location offset)))
624 (setf (sap-ref-sap location offset)
627 (vector-sap (coerce string 'simple-base-string))
628 (1+ (length string)))
630 (let ((utf8 (%deport-utf8-string string)))
631 (copy-memory (vector-sap utf8) (length utf8))))))
633 (defmethod reader-function ((type (eql 'string)) &rest args)
634 (declare (ignore type args))
635 #'(lambda (location &optional (offset 0))
636 (unless (null-pointer-p (sap-ref-sap location offset))
637 #+cmu(%naturalize-c-string (sap-ref-sap location offset))
638 #+sbcl(%naturalize-utf8-string (sap-ref-sap location offset)))))
640 (defmethod destroy-function ((type (eql 'string)) &rest args)
641 (declare (ignore type args))
642 #'(lambda (location &optional (offset 0))
643 (unless (null-pointer-p (sap-ref-sap location offset))
644 (deallocate-memory (sap-ref-sap location offset))
645 (setf (sap-ref-sap location offset) (make-pointer 0)))))
647 (defmethod unbound-value ((type (eql 'string)) &rest args)
648 (declare (ignore type args))
652 (defmethod alien-type ((type (eql 'pathname)) &rest args)
653 (declare (ignore type args))
654 (alien-type 'string))
656 (defmethod size-of ((type (eql 'pathname)) &rest args)
657 (declare (ignore type args))
660 (defmethod to-alien-form (path (type (eql 'pathname)) &rest args)
661 (declare (ignore type args))
662 (to-alien-form `(namestring (translate-logical-pathname ,path)) 'string))
664 (defmethod to-alien-function ((type (eql 'pathname)) &rest args)
665 (declare (ignore type args))
666 (let ((string-function (to-alien-function 'string)))
668 (funcall string-function (namestring path)))))
670 (defmethod from-alien-form (string (type (eql 'pathname)) &rest args)
671 (declare (ignore type args))
672 `(parse-namestring ,(from-alien-form string 'string)))
674 (defmethod from-alien-function ((type (eql 'pathname)) &rest args)
675 (declare (ignore type args))
676 (let ((string-function (from-alien-function 'string)))
678 (parse-namestring (funcall string-function string)))))
680 (defmethod cleanup-form (string (type (eql 'pathnanme)) &rest args)
681 (declare (ignore type args))
682 (cleanup-form string 'string))
684 (defmethod cleanup-function ((type (eql 'pathnanme)) &rest args)
685 (declare (ignore type args))
686 (cleanup-function 'string))
688 (defmethod writer-function ((type (eql 'pathname)) &rest args)
689 (declare (ignore type args))
690 (let ((string-writer (writer-function 'string)))
691 #'(lambda (path location &optional (offset 0))
692 (funcall string-writer (namestring path) location offset))))
694 (defmethod reader-function ((type (eql 'pathname)) &rest args)
695 (declare (ignore type args))
696 (let ((string-reader (reader-function 'string)))
697 #'(lambda (location &optional (offset 0))
698 (let ((string (funcall string-reader location offset)))
700 (parse-namestring string))))))
702 (defmethod destroy-function ((type (eql 'pathname)) &rest args)
703 (declare (ignore type args))
704 (destroy-function 'string))
706 (defmethod unbound-value ((type (eql 'pathname)) &rest args)
707 (declare (ignore type args))
708 (unbound-value 'string))
711 (defmethod alien-type ((type (eql 'boolean)) &rest args)
712 (apply #'alien-type 'signed-byte args))
714 (defmethod size-of ((type (eql 'boolean)) &rest args)
715 (apply #'size-of 'signed-byte args))
717 (defmethod to-alien-form (boolean (type (eql 'boolean)) &rest args)
718 (declare (ignore type args))
721 (defmethod to-alien-function ((type (eql 'boolean)) &rest args)
722 (declare (ignore type args))
726 (defmethod from-alien-form (boolean (type (eql 'boolean)) &rest args)
727 (declare (ignore type args))
728 `(not (zerop ,boolean)))
730 (defmethod from-alien-function ((type (eql 'boolean)) &rest args)
731 (declare (ignore type args))
733 (not (zerop boolean))))
735 (defmethod writer-function ((type (eql 'boolean)) &rest args)
736 (declare (ignore type))
737 (let ((writer (apply #'writer-function 'signed-byte args)))
738 #'(lambda (boolean location &optional (offset 0))
739 (funcall writer (if boolean 1 0) location offset))))
741 (defmethod reader-function ((type (eql 'boolean)) &rest args)
742 (declare (ignore type))
743 (let ((reader (apply #'reader-function 'signed-byte args)))
744 #'(lambda (location &optional (offset 0))
745 (not (zerop (funcall reader location offset))))))
748 (defmethod alien-type ((type (eql 'or)) &rest args)
749 (let ((alien-type (alien-type (first args))))
750 (unless (every #'(lambda (type)
751 (eq alien-type (alien-type type)))
753 (error "No common alien type specifier for union type: ~A"
757 (defmethod size-of ((type (eql 'or)) &rest args)
758 (declare (ignore type))
759 (size-of (first args)))
761 (defmethod to-alien-form (form (type (eql 'or)) &rest args)
762 (declare (ignore type))
763 `(let ((value ,form))
767 `(,type ,(to-alien-form 'value type)))
770 (defmethod to-alien-function ((type (eql 'or)) &rest types)
771 (declare (ignore type))
772 (let ((functions (mapcar #'to-alien-function types)))
775 for function in functions
777 when (typep value type)
778 do (return (funcall function value))
779 finally (error "~S is not of type ~A" value `(or ,@types))))))
781 (defmethod alien-type ((type (eql 'system-area-pointer)) &rest args)
782 (declare (ignore type args))
783 'system-area-pointer)
785 (defmethod size-of ((type (eql 'system-area-pointer)) &rest args)
786 (declare (ignore type args))
789 (defmethod writer-function ((type (eql 'system-area-pointer)) &rest args)
790 (declare (ignore type args))
791 #'(lambda (sap location &optional (offset 0))
792 (setf (sap-ref-sap location offset) sap)))
794 (defmethod reader-function ((type (eql 'system-area-pointer)) &rest args)
795 (declare (ignore type args))
796 #'(lambda (location &optional (offset 0))
797 (sap-ref-sap location offset)))
800 (defmethod alien-type ((type (eql 'null)) &rest args)
801 (declare (ignore type args))
802 (alien-type 'pointer))
804 (defmethod size-of ((type (eql 'null)) &rest args)
805 (declare (ignore type args))
808 (defmethod to-alien-form (null (type (eql 'null)) &rest args)
809 (declare (ignore null type args))
812 (defmethod to-alien-function ((type (eql 'null)) &rest args)
813 (declare (ignore type args))
815 (declare (ignore null))
819 (defmethod alien-type ((type (eql 'nil)) &rest args)
820 (declare (ignore type args))
823 (defmethod from-alien-function ((type (eql 'nil)) &rest args)
824 (declare (ignore type args))
826 (declare (ignore value))
830 (defmethod alien-type ((type (eql 'copy-of)) &rest args)
831 (declare (ignore type))
832 (alien-type (first args)))
834 (defmethod size-of ((type (eql 'copy-of)) &rest args)
835 (declare (ignore type))
836 (size-of (first args)))
838 (defmethod to-alien-form (form (type (eql 'copy-of)) &rest args)
839 (declare (ignore type))
840 (copy-to-alien-form form (first args)))
842 (defmethod to-alien-function ((type (eql 'copy-of)) &rest args)
843 (declare (ignore type))
844 (copy-to-alien-function (first args)))
846 (defmethod from-alien-form (form (type (eql 'copy-of)) &rest args)
847 (declare (ignore type))
848 (copy-from-alien-form form (first args)))
850 (defmethod from-alien-function ((type (eql 'copy-of)) &rest args)
851 (declare (ignore type))
852 (copy-from-alien-function (first args)))
854 (defmethod reader-function ((type (eql 'copy-of)) &rest args)
855 (declare (ignore type))
856 (reader-function (first args)))
858 (defmethod writer-function ((type (eql 'copy-of)) &rest args)
859 (declare (ignore type))
860 (writer-function (first args)))
863 (defmethod alien-type ((type (eql 'callback)) &rest args)
864 (declare (ignore type args))
865 (alien-type 'pointer))
867 (defmethod size-of ((type (eql 'callback)) &rest args)
868 (declare (ignore type args))
871 (defmethod to-alien-form (callback (type (eql 'callback)) &rest args)
872 (declare (ignore type args))
873 #+cmu `(callback ,callback)
874 #+sbcl `(sb-alien:alien-function-sap ,callback))
876 (defmethod to-alien-function ((type (eql 'callback)) &rest args)
877 (declare (ignore type args))
878 #+cmu #'(lambda (callback) (callback callback))
879 #+sbcl #'sb-alien:alien-function-sap)
882 (defun find-callback (pointer)
883 (find pointer alien::*callbacks* :key #'callback-trampoline :test #'sap=))
885 (defmethod from-alien-form (pointer (type (eql 'callback)) &rest args)
886 (declare (ignore type args))
887 #+cmu `(find-callback ,pointer)
888 #+sbcl `(sb-alien::%find-alien-function ,pointer))
890 (defmethod from-alien-function ((type (eql 'callback)) &rest args)
891 (declare (ignore type args))
892 #+cmu #'find-callback
893 #+sbcl #'sb-alien::%find-alien-function)
895 (defmethod writer-function ((type (eql 'callback)) &rest args)
896 (declare (ignore type args))
897 (let ((writer (writer-function 'pointer))
898 (to-alien (to-alien-function 'callback)))
899 #'(lambda (callback location &optional (offset 0))
900 (funcall writer (funcall to-alien callback) location offset))))
902 (defmethod reader-function ((type (eql 'callback)) &rest args)
903 (declare (ignore type args))
904 (let ((reader (reader-function 'pointer))
905 (from-alien (from-alien-function 'callback)))
906 #'(lambda (location &optional (offset 0))
907 (let ((pointer (funcall reader location offset)))
908 (unless (null-pointer-p pointer)
909 (funcall from-alien pointer))))))
911 (defmethod unbound-value ((type (eql 'callback)) &rest args)
912 (declare (ignore type args))