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 1.23 2006-02-06 18:12:19 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))
350 (defmethod alien-type ((type (eql 'signed-byte)) &rest args)
351 (declare (ignore type))
352 (destructuring-bind (&optional (size '*)) args
354 (#.+bits-of-byte+ #+cmu'(alien:signed 8) #+sbcl'(sb-alien:signed 8))
355 (#.+bits-of-short+ #+cmu 'c-call:short #+sbcl 'sb-alien:short)
356 ((* #.+bits-of-int+) #+cmu 'c-call:int #+sbcl 'sb-alien:int)
357 (#.+bits-of-long+ #+cmu 'c-call:long #+sbcl 'sb-alien:long))))
359 (defmethod size-of ((type (eql 'signed-byte)) &rest args)
360 (declare (ignore type))
361 (destructuring-bind (&optional (size '*)) args
364 (#.+bits-of-short+ +size-of-short+)
365 ((* #.+bits-of-int+) +size-of-int+)
366 (#.+bits-of-long+ +size-of-long+))))
368 (defmethod unbound-value ((type t) &rest args)
369 (declare (ignore type args))
372 (defmethod writer-function ((type (eql 'signed-byte)) &rest args)
373 (declare (ignore type))
374 (destructuring-bind (&optional (size '*)) args
375 (let ((size (if (eq size '*) +bits-of-int+ size)))
377 (8 #'(lambda (value location &optional (offset 0))
378 (setf (signed-sap-ref-8 location offset) value)))
379 (16 #'(lambda (value location &optional (offset 0))
380 (setf (signed-sap-ref-16 location offset) value)))
381 (32 #'(lambda (value location &optional (offset 0))
382 (setf (signed-sap-ref-32 location offset) value)))
383 (64 #'(lambda (value location &optional (offset 0))
384 (setf (signed-sap-ref-64 location offset) value)))))))
386 (defmethod reader-function ((type (eql 'signed-byte)) &rest args)
387 (declare (ignore type))
388 (destructuring-bind (&optional (size '*)) args
389 (let ((size (if (eq size '*) +bits-of-int+ size)))
391 (8 #'(lambda (sap &optional (offset 0) weak-p)
392 (declare (ignore weak-p))
393 (signed-sap-ref-8 sap offset)))
394 (16 #'(lambda (sap &optional (offset 0) weak-p)
395 (declare (ignore weak-p))
396 (signed-sap-ref-16 sap offset)))
397 (32 #'(lambda (sap &optional (offset 0) weak-p)
398 (declare (ignore weak-p))
399 (signed-sap-ref-32 sap offset)))
400 (64 #'(lambda (sap &optional (offset 0) weak-p)
401 (declare (ignore weak-p))
402 (signed-sap-ref-64 sap offset)))))))
404 (defmethod alien-type ((type (eql 'unsigned-byte)) &rest args)
405 (destructuring-bind (&optional (size '*)) args
407 (#.+bits-of-byte+ #+cmu'(alien:unsigned 8) #+sbcl'(sb-alien:unsigned 8))
408 (#.+bits-of-short+ #+cmu 'c-call:unsigned-short
409 #+sbcl 'sb-alien:unsigned-short)
410 ((* #.+bits-of-int+) #+cmu 'c-call:unsigned-int
411 #+sbcl 'sb-alien:unsigned-int)
412 (#.+bits-of-long+ #+cmu 'c-call:unsigned-long
413 #+sbcl 'sb-alien:unsigned-long))))
415 (defmethod size-of ((type (eql 'unsigned-byte)) &rest args)
416 (apply #'size-of 'signed args))
418 (defmethod writer-function ((type (eql 'unsigned-byte)) &rest args)
419 (declare (ignore type))
420 (destructuring-bind (&optional (size '*)) args
421 (let ((size (if (eq size '*) +bits-of-int+ size)))
423 (8 #'(lambda (value location &optional (offset 0))
424 (setf (sap-ref-8 location offset) value)))
425 (16 #'(lambda (value location &optional (offset 0))
426 (setf (sap-ref-16 location offset) value)))
427 (32 #'(lambda (value location &optional (offset 0))
428 (setf (sap-ref-32 location offset) value)))
429 (64 #'(lambda (value location &optional (offset 0))
430 (setf (sap-ref-64 location offset) value)))))))
432 (defmethod reader-function ((type (eql 'unsigned-byte)) &rest args)
433 (declare (ignore type))
434 (destructuring-bind (&optional (size '*)) args
435 (let ((size (if (eq size '*) +bits-of-int+ size)))
437 (8 #'(lambda (sap &optional (offset 0) weak-p)
438 (declare (ignore weak-p))
439 (sap-ref-8 sap offset)))
440 (16 #'(lambda (sap &optional (offset 0) weak-p)
441 (declare (ignore weak-p))
442 (sap-ref-16 sap offset)))
443 (32 #'(lambda (sap &optional (offset 0) weak-p)
444 (declare (ignore weak-p))
445 (sap-ref-32 sap offset)))
446 (64 #'(lambda (sap &optional (offset 0) weak-p)
447 (declare (ignore weak-p))
448 (sap-ref-64 sap offset)))))))
451 (defmethod alien-type ((type (eql 'integer)) &rest args)
452 (declare (ignore type args))
453 (alien-type 'signed-byte))
455 (defmethod size-of ((type (eql 'integer)) &rest args)
456 (declare (ignore type args))
457 (size-of 'signed-byte))
459 (defmethod writer-function ((type (eql 'integer)) &rest args)
460 (declare (ignore type args))
461 (writer-function 'signed-byte))
463 (defmethod reader-function ((type (eql 'integer)) &rest args)
464 (declare (ignore type args))
465 (reader-function 'signed-byte))
468 (defmethod alien-type ((type (eql 'fixnum)) &rest args)
469 (declare (ignore type args))
470 (alien-type 'signed-byte))
472 (defmethod size-of ((type (eql 'fixnum)) &rest args)
473 (declare (ignore type args))
474 (size-of 'signed-byte))
477 (defmethod alien-type ((type (eql 'single-float)) &rest args)
478 (declare (ignore type args))
479 #+cmu 'alien:single-float #+sbcl 'sb-alien:single-float)
481 (defmethod size-of ((type (eql 'single-float)) &rest args)
482 (declare (ignore type args))
485 (defmethod to-alien-form (form (type (eql 'single-float)) &rest args)
486 (declare (ignore type args))
487 `(coerce ,form 'single-float))
489 (defmethod to-alien-function ((type (eql 'single-float)) &rest args)
490 (declare (ignore type args))
492 (coerce number 'single-float)))
494 (defmethod writer-function ((type (eql 'single-float)) &rest args)
495 (declare (ignore type args))
496 #'(lambda (value location &optional (offset 0))
497 (setf (sap-ref-single location offset) (coerce value 'single-float))))
499 (defmethod reader-function ((type (eql 'single-float)) &rest args)
500 (declare (ignore type args))
501 #'(lambda (sap &optional (offset 0) weak-p)
502 (declare (ignore weak-p))
503 (sap-ref-single sap offset)))
506 (defmethod alien-type ((type (eql 'double-float)) &rest args)
507 (declare (ignore type args))
508 #+cmu 'alien:double-float #+sbcl 'sb-alien:double-float)
510 (defmethod size-of ((type (eql 'double-float)) &rest args)
511 (declare (ignore type args))
514 (defmethod to-alien-form (form (type (eql 'double-float)) &rest args)
515 (declare (ignore type args))
516 `(coerce ,form 'double-float))
518 (defmethod to-alien-function ((type (eql 'double-float)) &rest args)
519 (declare (ignore type args))
521 (coerce number 'double-float)))
523 (defmethod writer-function ((type (eql 'double-float)) &rest args)
524 (declare (ignore type args))
525 #'(lambda (value location &optional (offset 0))
526 (setf (sap-ref-double location offset) (coerce value 'double-float))))
528 (defmethod reader-function ((type (eql 'double-float)) &rest args)
529 (declare (ignore type args))
530 #'(lambda (sap &optional (offset 0) weak-p)
531 (declare (ignore weak-p))
532 (sap-ref-double sap offset)))
535 (defmethod alien-type ((type (eql 'base-char)) &rest args)
536 (declare (ignore type args))
537 #+cmu 'c-call:char #+sbcl 'sb-alien:char)
539 (defmethod size-of ((type (eql 'base-char)) &rest args)
540 (declare (ignore type args))
543 (defmethod writer-function ((type (eql 'base-char)) &rest args)
544 (declare (ignore type args))
545 #'(lambda (char location &optional (offset 0))
546 (setf (sap-ref-8 location offset) (char-code char))))
548 (defmethod reader-function ((type (eql 'base-char)) &rest args)
549 (declare (ignore type args))
550 #'(lambda (location &optional (offset 0) weak-p)
551 (declare (ignore weak-p))
552 (code-char (sap-ref-8 location offset))))
555 (defmethod alien-type ((type (eql 'string)) &rest args)
556 (declare (ignore type args))
557 (alien-type 'pointer))
559 (defmethod size-of ((type (eql 'string)) &rest args)
560 (declare (ignore type args))
563 (defmethod to-alien-form (string (type (eql 'string)) &rest args)
564 (declare (ignore type args))
565 `(let ((string ,string))
566 ;; Always copy strings to prevent seg fault due to GC
569 (vector-sap (coerce string 'simple-base-string))
570 (1+ (length string)))
572 (let ((utf8 (%deport-utf8-string string)))
573 (copy-memory (vector-sap utf8) (length utf8)))))
575 (defmethod to-alien-function ((type (eql 'string)) &rest args)
576 (declare (ignore type args))
580 (vector-sap (coerce string 'simple-base-string))
581 (1+ (length string)))
583 (let ((utf8 (%deport-utf8-string string)))
584 (copy-memory (vector-sap utf8) (length utf8)))))
586 (defmethod from-alien-form (string (type (eql 'string)) &rest args)
587 (declare (ignore type args))
588 `(let ((string ,string))
589 (unless (null-pointer-p string)
591 #+cmu(%naturalize-c-string string)
592 #+sbcl(%naturalize-utf8-string string)
593 (deallocate-memory string)))))
595 (defmethod from-alien-function ((type (eql 'string)) &rest args)
596 (declare (ignore type args))
598 (unless (null-pointer-p string)
600 #+cmu(%naturalize-c-string string)
601 #+sbcl(%naturalize-utf8-string string)
602 (deallocate-memory string)))))
604 (defmethod cleanup-form (string (type (eql 'string)) &rest args)
605 (declare (ignore type args))
606 `(let ((string ,string))
607 (unless (null-pointer-p string)
608 (deallocate-memory string))))
610 (defmethod cleanup-function ((type (eql 'string)) &rest args)
611 (declare (ignore args))
613 (unless (null-pointer-p string)
614 (deallocate-memory string))))
616 (defmethod copy-from-alien-form (string (type (eql 'string)) &rest args)
617 (declare (ignore type args))
618 `(let ((string ,string))
619 (unless (null-pointer-p string)
620 #+cmu(%naturalize-c-string string)
621 #+sbcl(%naturalize-utf8-string string))))
623 (defmethod copy-from-alien-function ((type (eql 'string)) &rest args)
624 (declare (ignore type args))
626 (unless (null-pointer-p string)
627 #+cmu(%naturalize-c-string string)
628 #+sbcl(%naturalize-utf8-string string))))
630 (defmethod writer-function ((type (eql 'string)) &rest args)
631 (declare (ignore type args))
632 #'(lambda (string location &optional (offset 0))
633 (assert (null-pointer-p (sap-ref-sap location offset)))
634 (setf (sap-ref-sap location offset)
637 (vector-sap (coerce string 'simple-base-string))
638 (1+ (length string)))
640 (let ((utf8 (%deport-utf8-string string)))
641 (copy-memory (vector-sap utf8) (length utf8))))))
643 (defmethod reader-function ((type (eql 'string)) &rest args)
644 (declare (ignore type args))
645 #'(lambda (location &optional (offset 0) weak-p)
646 (declare (ignore weak-p))
647 (unless (null-pointer-p (sap-ref-sap location offset))
648 #+cmu(%naturalize-c-string (sap-ref-sap location offset))
649 #+sbcl(%naturalize-utf8-string (sap-ref-sap location offset)))))
651 (defmethod destroy-function ((type (eql 'string)) &rest args)
652 (declare (ignore type args))
653 #'(lambda (location &optional (offset 0))
654 (unless (null-pointer-p (sap-ref-sap location offset))
655 (deallocate-memory (sap-ref-sap location offset))
656 (setf (sap-ref-sap location offset) (make-pointer 0)))))
658 (defmethod unbound-value ((type (eql 'string)) &rest args)
659 (declare (ignore type args))
663 (defmethod alien-type ((type (eql 'pathname)) &rest args)
664 (declare (ignore type args))
665 (alien-type 'string))
667 (defmethod size-of ((type (eql 'pathname)) &rest args)
668 (declare (ignore type args))
671 (defmethod to-alien-form (path (type (eql 'pathname)) &rest args)
672 (declare (ignore type args))
673 (to-alien-form `(namestring (translate-logical-pathname ,path)) 'string))
675 (defmethod to-alien-function ((type (eql 'pathname)) &rest args)
676 (declare (ignore type args))
677 (let ((string-function (to-alien-function 'string)))
679 (funcall string-function (namestring path)))))
681 (defmethod from-alien-form (string (type (eql 'pathname)) &rest args)
682 (declare (ignore type args))
683 `(parse-namestring ,(from-alien-form string 'string)))
685 (defmethod from-alien-function ((type (eql 'pathname)) &rest args)
686 (declare (ignore type args))
687 (let ((string-function (from-alien-function 'string)))
689 (parse-namestring (funcall string-function string)))))
691 (defmethod cleanup-form (string (type (eql 'pathnanme)) &rest args)
692 (declare (ignore type args))
693 (cleanup-form string 'string))
695 (defmethod cleanup-function ((type (eql 'pathnanme)) &rest args)
696 (declare (ignore type args))
697 (cleanup-function 'string))
699 (defmethod writer-function ((type (eql 'pathname)) &rest args)
700 (declare (ignore type args))
701 (let ((string-writer (writer-function 'string)))
702 #'(lambda (path location &optional (offset 0))
703 (funcall string-writer (namestring path) location offset))))
705 (defmethod reader-function ((type (eql 'pathname)) &rest args)
706 (declare (ignore type args))
707 (let ((string-reader (reader-function 'string)))
708 #'(lambda (location &optional (offset 0) weak-p)
709 (declare (ignore weak-p))
710 (let ((string (funcall string-reader location offset)))
712 (parse-namestring string))))))
714 (defmethod destroy-function ((type (eql 'pathname)) &rest args)
715 (declare (ignore type args))
716 (destroy-function 'string))
718 (defmethod unbound-value ((type (eql 'pathname)) &rest args)
719 (declare (ignore type args))
720 (unbound-value 'string))
723 (defmethod alien-type ((type (eql 'boolean)) &rest args)
724 (apply #'alien-type 'signed-byte args))
726 (defmethod size-of ((type (eql 'boolean)) &rest args)
727 (apply #'size-of 'signed-byte args))
729 (defmethod to-alien-form (boolean (type (eql 'boolean)) &rest args)
730 (declare (ignore type args))
733 (defmethod to-alien-function ((type (eql 'boolean)) &rest args)
734 (declare (ignore type args))
738 (defmethod from-alien-form (boolean (type (eql 'boolean)) &rest args)
739 (declare (ignore type args))
740 `(not (zerop ,boolean)))
742 (defmethod from-alien-function ((type (eql 'boolean)) &rest args)
743 (declare (ignore type args))
745 (not (zerop boolean))))
747 (defmethod writer-function ((type (eql 'boolean)) &rest args)
748 (declare (ignore type))
749 (let ((writer (apply #'writer-function 'signed-byte args)))
750 #'(lambda (boolean location &optional (offset 0))
751 (funcall writer (if boolean 1 0) location offset))))
753 (defmethod reader-function ((type (eql 'boolean)) &rest args)
754 (declare (ignore type))
755 (let ((reader (apply #'reader-function 'signed-byte args)))
756 #'(lambda (location &optional (offset 0) weak-p)
757 (declare (ignore weak-p))
758 (not (zerop (funcall reader location offset))))))
761 (defmethod alien-type ((type (eql 'or)) &rest args)
762 (let ((alien-type (alien-type (first args))))
763 (unless (every #'(lambda (type)
764 (eq alien-type (alien-type type)))
766 (error "No common alien type specifier for union type: ~A"
770 (defmethod size-of ((type (eql 'or)) &rest args)
771 (declare (ignore type))
772 (size-of (first args)))
774 (defmethod to-alien-form (form (type (eql 'or)) &rest args)
775 (declare (ignore type))
776 `(let ((value ,form))
780 `(,type ,(to-alien-form 'value type)))
783 (defmethod to-alien-function ((type (eql 'or)) &rest types)
784 (declare (ignore type))
785 (let ((functions (mapcar #'to-alien-function types)))
788 for function in functions
790 when (typep value type)
791 do (return (funcall function value))
792 finally (error "~S is not of type ~A" value `(or ,@types))))))
794 (defmethod alien-type ((type (eql 'system-area-pointer)) &rest args)
795 (declare (ignore type args))
796 'system-area-pointer)
798 (defmethod size-of ((type (eql 'system-area-pointer)) &rest args)
799 (declare (ignore type args))
802 (defmethod writer-function ((type (eql 'system-area-pointer)) &rest args)
803 (declare (ignore type args))
804 #'(lambda (sap location &optional (offset 0))
805 (setf (sap-ref-sap location offset) sap)))
807 (defmethod reader-function ((type (eql 'system-area-pointer)) &rest args)
808 (declare (ignore type args))
809 #'(lambda (location &optional (offset 0) weak-p)
810 (declare (ignore weak-p))
811 (sap-ref-sap location offset)))
814 (defmethod alien-type ((type (eql 'null)) &rest args)
815 (declare (ignore type args))
816 (alien-type 'pointer))
818 (defmethod size-of ((type (eql 'null)) &rest args)
819 (declare (ignore type args))
822 (defmethod to-alien-form (null (type (eql 'null)) &rest args)
823 (declare (ignore null type args))
826 (defmethod to-alien-function ((type (eql 'null)) &rest args)
827 (declare (ignore type args))
829 (declare (ignore null))
833 (defmethod alien-type ((type (eql 'nil)) &rest args)
834 (declare (ignore type args))
837 (defmethod from-alien-function ((type (eql 'nil)) &rest args)
838 (declare (ignore type args))
840 (declare (ignore value))
844 (defmethod alien-type ((type (eql 'copy-of)) &rest args)
845 (declare (ignore type))
846 (alien-type (first args)))
848 (defmethod size-of ((type (eql 'copy-of)) &rest args)
849 (declare (ignore type))
850 (size-of (first args)))
852 (defmethod to-alien-form (form (type (eql 'copy-of)) &rest args)
853 (declare (ignore type))
854 (copy-to-alien-form form (first args)))
856 (defmethod to-alien-function ((type (eql 'copy-of)) &rest args)
857 (declare (ignore type))
858 (copy-to-alien-function (first args)))
860 (defmethod from-alien-form (form (type (eql 'copy-of)) &rest args)
861 (declare (ignore type))
862 (copy-from-alien-form form (first args)))
864 (defmethod from-alien-function ((type (eql 'copy-of)) &rest args)
865 (declare (ignore type))
866 (copy-from-alien-function (first args)))
868 (defmethod reader-function ((type (eql 'copy-of)) &rest args)
869 (declare (ignore type))
870 (reader-function (first args)))
872 (defmethod writer-function ((type (eql 'copy-of)) &rest args)
873 (declare (ignore type))
874 (writer-function (first args)))
877 (defmethod alien-type ((type (eql 'callback)) &rest args)
878 (declare (ignore type args))
879 (alien-type 'pointer))
881 (defmethod size-of ((type (eql 'callback)) &rest args)
882 (declare (ignore type args))
885 (defmethod to-alien-form (callback (type (eql 'callback)) &rest args)
886 (declare (ignore type args))
887 #+cmu `(callback ,callback)
888 #+sbcl `(sb-alien:alien-function-sap ,callback))
890 (defmethod to-alien-function ((type (eql 'callback)) &rest args)
891 (declare (ignore type args))
892 #+cmu #'(lambda (callback) (callback callback))
893 #+sbcl #'sb-alien:alien-function-sap)
896 (defun find-callback (pointer)
897 (find pointer alien::*callbacks* :key #'callback-trampoline :test #'sap=))
899 (defmethod from-alien-form (pointer (type (eql 'callback)) &rest args)
900 (declare (ignore type args))
901 #+cmu `(find-callback ,pointer)
902 #+sbcl `(sb-alien::%find-alien-function ,pointer))
904 (defmethod from-alien-function ((type (eql 'callback)) &rest args)
905 (declare (ignore type args))
906 #+cmu #'find-callback
907 #+sbcl #'sb-alien::%find-alien-function)
909 (defmethod writer-function ((type (eql 'callback)) &rest args)
910 (declare (ignore type args))
911 (let ((writer (writer-function 'pointer))
912 (to-alien (to-alien-function 'callback)))
913 #'(lambda (callback location &optional (offset 0))
914 (funcall writer (funcall to-alien callback) location offset))))
916 (defmethod reader-function ((type (eql 'callback)) &rest args)
917 (declare (ignore type args))
918 (let ((reader (reader-function 'pointer))
919 (from-alien (from-alien-function 'callback)))
920 #'(lambda (location &optional (offset 0) weak-p)
921 (declare (ignore weak-p))
922 (let ((pointer (funcall reader location offset)))
923 (unless (null-pointer-p pointer)
924 (funcall from-alien pointer))))))
926 (defmethod unbound-value ((type (eql 'callback)) &rest args)
927 (declare (ignore type args))