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source: trunk/ccl/objc-bridge/bridge.lisp @ 7845

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Last change on this file since 7845 was 7845, checked in by gz, 13 years ago
Print the 'defining new Objc message' note if either compile-print or (the new variable) objc-verbose is true. Unimportantly default objc-verbose to false
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 61.6 KB

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1	;;;; -- Mode: Lisp; Package: CCL --
2	;;;; bridge.lisp
3	;;;;
4	;;;; A Lisp bridge for Cocoa
5	;;;;
6	;;;; This provides:
7	;;;; (1) Convenient Lisp syntax for instantiating ObjC classes
8	;;;; (2) Convenient Lisp syntax for invoking ObjC methods
9	;;;;
10	;;;; Copyright (c) 2003 Randall D. Beer
11	;;;;
12	;;;; This software is licensed under the terms of the Lisp Lesser GNU Public
13	;;;; License, known as the LLGPL. The LLGPL consists of a preamble and
14	;;;; the LGPL. Where these conflict, the preamble takes precedence. The
15	;;;; LLGPL is available online at http://opensource.franz.com/preamble.html.
16	;;;;
17	;;;; Please send comments and bug reports to <beer@eecs.cwru.edu>
18
19	;;; Temporary package and module stuff
20
21	(in-package "CCL")
22
23	(require "OBJC-RUNTIME")
24	(require "NAME-TRANSLATION")
25
26	;;; Used in PRINT-OBJECT methods.
27
28	(defun describe-macptr-allocation-and-address (p stream)
29	(format stream " ~@[~a ~](#x~x)"
30	(%macptr-allocation-string p)
31	(%ptr-to-int p)))
32
33	(defstruct typed-foreign-struct-info
34	foreign-type
35	lisp-class-name
36	initializer
37	constructor
38	with-form-name
39	predicate-name)
40
41	(defparameter typed-foreign-struct-info ())
42
43	(defun note-typed-foreign-struct-info (foreign-type lisp-class-name initializer constructor with-form-name predicate-name)
44	(let* ((info (find foreign-type typed-foreign-struct-info :test #'equal :key #'typed-foreign-struct-info-foreign-type)))
45	(unless info
46	(setq info (make-typed-foreign-struct-info :foreign-type foreign-type))
47	(push info typed-foreign-struct-info))
48	(setf (typed-foreign-struct-info-lisp-class-name info) lisp-class-name
49	(typed-foreign-struct-info-initializer info) initializer
50	(typed-foreign-struct-info-constructor info) constructor
51	(typed-foreign-struct-info-with-form-name info) with-form-name
52	(typed-foreign-struct-info-predicate-name info) predicate-name)
53	info))
54
55	;;; This gets installed as the COMPILER-MACRO-FUNCTION on any dispatch
56	;;; function associated with a method that passes structures by value.
57	(defun hoist-struct-constructors (whole env)
58	(declare (ignorable env))
59	(destructuring-bind (operator receiver &rest args) whole
60	;;See if any arguments are "obviously" known structure-creation forms.
61	(if (null (dolist (arg args)
62	(if (and (consp arg)
63	(find (car arg) typed-foreign-struct-info :key #'typed-foreign-struct-info-constructor))
64	(return t))))
65	whole
66	;;; Simplest to hoist one call, then let compiler-macroexpand
67	;;; call us again.
68	(let* ((with-name nil)
69	(info nil)
70	(temp (gensym)))
71	(collect ((new-args))
72	(new-args operator)
73	(new-args receiver)
74	(dolist (arg args)
75	(if (or info
76	(atom arg)
77	(not (setq info (find (car arg) typed-foreign-struct-info :key #'typed-foreign-struct-info-constructor))))
78	(new-args arg)
79	(progn
80	(setq with-name (typed-foreign-struct-info-with-form-name info))
81	(if (cdr arg)
82	(new-args `(progn (,(typed-foreign-struct-info-initializer info)
83	,temp
84	,@(cdr arg))
85	,temp))
86	(new-args temp)))))
87	`(,with-name (,temp)
88	(values ,(new-args))))))))
89
90
91
92	(defun define-typed-foreign-struct-accessor (type-name lisp-accessor-name foreign-accessor &optional (transform-output #'identity) (transform-input #'identity))
93	(let* ((arg (gensym))
94	(val (gensym)))
95	`(progn
96	(declaim (inline ,lisp-accessor-name))
97	(defun ,lisp-accessor-name (,arg)
98	(if (typep ,arg ',type-name)
99	,(funcall transform-input `(pref ,arg ,foreign-accessor))
100	(report-bad-arg ,arg ',type-name)))
101	(declaim (inline (setf ,lisp-accessor-name)))
102	(defun (setf ,lisp-accessor-name) (,val ,arg)
103	(if (typep ,arg ',type-name)
104	(setf (pref ,arg ,foreign-accessor) ,(funcall transform-output val))
105	(report-bad-arg ,arg ',type-name))))))
106
107	(defun define-typed-foreign-struct-accessors (type-name tuples)
108	(collect ((body))
109	(dolist (tuple tuples `(progn ,@(body)))
110	(body (apply #'define-typed-foreign-struct-accessor type-name (cdr tuple))))))
111
112	(defun define-typed-foreign-struct-initializer (init-function-name tuples)
113	(when init-function-name
114	(let* ((struct (gensym)))
115	(collect ((initforms)
116	(args))
117	(args struct)
118	(dolist (tuple tuples)
119	(destructuring-bind (arg-name lisp-accessor foreign-accessor &optional (transform #'identity)) tuple
120	(declare (ignore lisp-accessor))
121	(args arg-name)
122	(initforms `(setf (pref ,struct ,foreign-accessor) ,(funcall transform arg-name)))))
123	`(progn
124	(declaim (inline ,init-function-name))
125	(defun ,init-function-name ,(args)
126	(declare (ignorable ,struct))
127	,@(initforms)
128	,struct))))))
129
130	(defun define-typed-foreign-struct-creation-function (creation-function-name init-function-name foreign-type accessors)
131	(when creation-function-name
132	(let* ((struct (gensym))
133	(arg-names (mapcar #'car accessors)))
134	`(defun ,creation-function-name ,arg-names
135	(let* ((,struct (make-gcable-record ,foreign-type)))
136	(,init-function-name ,struct ,@arg-names)
137	,struct)))))
138
139	(defun define-typed-foreign-struct-class-with-form (with-form-name foreign-type init-function-name)
140	(declare (ignorable init-function-name))
141	(when with-form-name
142	`(defmacro ,with-form-name ((instance &rest inits) &body body)
143	(multiple-value-bind (body decls) (parse-body body nil)
144	`(rlet ((,instance ,,foreign-type))
145	,@decls
146	,@(when inits
147	`((,',init-function-name ,instance ,@inits)))
148	,@body)))))
149
150
151	(defmacro define-typed-foreign-struct-class (class-name (foreign-type predicate-name init-function-name creation-function-name with-form-name) &rest accessors)
152	(let* ((arg (gensym)))
153	`(progn
154	(%register-type-ordinal-class (parse-foreign-type ',foreign-type) ',class-name)
155	(def-foreign-type ,class-name ,foreign-type)
156	(declaim (inline ,predicate-name))
157	(note-typed-foreign-struct-info ',foreign-type ',class-name ',init-function-name ',creation-function-name ',with-form-name ',predicate-name)
158	(defun ,predicate-name (,arg)
159	(and (typep ,arg 'macptr)
160	(<= (the fixnum (%macptr-domain ,arg)) 1)
161	(= (the fixnum (%macptr-type ,arg))
162	(foreign-type-ordinal (load-time-value (parse-foreign-type ',foreign-type))))))
163	(eval-when (:compile-toplevel :load-toplevel :execute)
164	(setf (type-predicate ',class-name) ',predicate-name))
165	,(define-typed-foreign-struct-initializer init-function-name accessors)
166	,(define-typed-foreign-struct-creation-function creation-function-name init-function-name foreign-type accessors)
167	,(define-typed-foreign-struct-class-with-form with-form-name foreign-type init-function-name)
168	,(define-typed-foreign-struct-accessors class-name accessors)
169	',class-name)))
170
171	(eval-when (:compile-toplevel :load-toplevel :execute)
172	(defun wrap-cg-float (x)
173	`(float ,x +cgfloat-zero+)))
174
175
176
177	;;; AEDesc (Apple Event Descriptor)
178
179	(define-typed-foreign-struct-class ns::aedesc (:<AED>esc ns::aedesc-p ns::init-aedesc ns::make-aedesc ns::with-aedesc)
180	(descriptor-type ns::aedesc-descriptor-type :<AED>esc.descriptor<T>ype)
181	(data-handle ns::aedesc-data-handle :<AED>esc.data<H>andle))
182
183
184	(defmethod print-object ((a ns::aedesc) stream)
185	(print-unreadable-object (a stream :type t :identity (%gcable-ptr-p a))
186	(unless (%null-ptr-p a)
187	(format stream "~s ~s"
188	(ns::aedesc-descriptor-type a)
189	(ns::aedesc-data-handle a)))
190	(describe-macptr-allocation-and-address a stream)))
191
192	;;; It's not clear how useful this would be; I think that it's
193	;;; part of the ObjC 2.0 extensible iteration stuff ("foreach").
194	#+apple-objc-2.0
195	(define-typed-foreign-struct-class ns::ns-fast-enumeration-state (:<NSF>ast<E>numeration<S>tate ns::ns-fast-enumeration-state-p ns::init-ns-fast-enumeration-state ns::make-ns-fast-enumeration-state ns::with-ns-fast-enumeration-state))
196
197	;;; NSAffineTransformStruct CGAffineTransform
198	(define-typed-foreign-struct-class ns::ns-affine-transform-struct (:<NSA>ffine<T>ransform<S>truct ns::ns-affine-transform-struct-p ns::init-ns-affine-transform-struct ns::make-ns-affine-transform-struct ns::wint-ns-affine-transform-struct)
199	(m11 ns::ns-affine-transform-struct-m11 :<NSA>ffine<T>ransform<S>truct.m11 wrap-cg-float)
200	(m12 ns::ns-affine-transform-struct-m12 :<NSA>ffine<T>ransform<S>truct.m12 wrap-cg-float)
201	(m21 ns::ns-affine-transform-struct-m21 :<NSA>ffine<T>ransform<S>truct.m21 wrap-cg-float)
202	(m22 ns::ns-affine-transform-struct-m22 :<NSA>ffine<T>ransform<S>truct.m22 wrap-cg-float)
203	(tx ns::ns-affine-transform-struct-tx :<NSA>ffine<T>ransform<S>truct.t<X> wrap-cg-float)
204	(ty ns::ns-affine-transform-struct-ty :<NSA>ffine<T>ransform<S>truct.t<Y> wrap-cg-float))
205
206
207	(defmethod print-object ((transform ns::ns-affine-transform-struct) stream)
208	(print-unreadable-object (transform stream :type t :identity t)
209	(format stream "~s ~s ~s ~s ~s ~s"
210	(ns::ns-affine-transform-struct-m11 transform)
211	(ns::ns-affine-transform-struct-m12 transform)
212	(ns::ns-affine-transform-struct-m21 transform)
213	(ns::ns-affine-transform-struct-m22 transform)
214	(ns::ns-affine-transform-struct-tx transform)
215	(ns::ns-affine-transform-struct-ty transform))
216	(describe-macptr-allocation-and-address transform stream)))
217
218
219
220
221
222	;;; An <NSA>ffine<T>ransform<S>truct is identical to a
223	;;; (:struct :<GGA>ffine<T>ransform), except for the names of its fields.
224
225	(setf (foreign-type-ordinal (parse-foreign-type '(:struct :<GGA>ffine<T>ransform)))
226	(foreign-type-ordinal (parse-foreign-type :<NSA>ffine<T>ransform<S>truct)))
227
228
229	(eval-when (:compile-toplevel :load-toplevel :execute)
230	(defun unwrap-boolean (form)
231	`(not (eql 0 ,form)))
232	(defun wrap-boolean (form)
233	`(if ,form 1 0)))
234
235
236	;;; NSDecimal
237	(define-typed-foreign-struct-class ns::ns-decimal (:<NSD>ecimal ns::ns-decimal-p nil nil nil)
238	(nil ns::ns-decimal-exponent :<NSD>ecimal._exponent)
239	(nil ns::ns-decimal-length :<NSD>ecimal._length)
240	(nil ns::ns-decimal-is-negative :<NSD>ecimal._is<N>egative wrap-boolean unwrap-boolean)
241	(nil ns::ns-decimal-is-compact :<NSD>ecimal._is<C>ompact wrap-boolean unwrap-boolean))
242
243
244	(defun ns::init-ns-decimal (data exponent length is-negative is-compact mantissa)
245	(setf (pref data :<NSD>ecimal._exponent) exponent
246	(pref data :<NSD>ecimal._length) length
247	(pref data :<NSD>ecimal._is<N>egative) (if is-negative 1 0)
248	(pref data :<NSD>ecimal._is<C>ompact) (if is-compact 1 0))
249	(let* ((v (coerce mantissa '(vector (unsigned-byte 16) 8))))
250	(declare (type (simple-array (unsigned-byte 16) (8)) v))
251	(with-macptrs ((m (pref data :<NSD>ecimal._mantissa)))
252	(dotimes (i 8)
253	(setf (paref m (:* (:unsigned 16)) i) (aref v i))))))
254
255	(defun ns::make-ns-decimal (exponent length is-negative is-compact mantissa)
256	(let* ((data (make-gcable-record :<NSD>ecimal)))
257	(ns::init-ns-decimal data exponent length is-negative is-compact mantissa)
258	data))
259
260
261
262
263	(defun ns::ns-decimal-mantissa (decimal)
264	(if (typep decimal 'ns::ns-decimal)
265	(let* ((dest (make-array 8 :element-type '(unsigned-byte 16))))
266	(with-macptrs ((m (pref decimal :<NSD>ecimal._mantissa)))
267	(dotimes (i 8 dest)
268	(setf (aref dest i) (paref m (:* (:unsigned 16)) i)))))
269	(report-bad-arg decimal 'ns::ns-decimal)))
270
271	(defun (setf ns::ns-decimal-mantissa) (new decimal)
272	(if (typep decimal 'ns::ns-decimal)
273	(let* ((src (coerce new '(simple-array (unsigned-byte 16) (8)))))
274	(declare (type (simple-array (unsigned-byte 16) 8) src))
275	(with-macptrs ((m (pref decimal :<NSD>ecimal._mantissa)))
276	(dotimes (i 8 new)
277	(setf (paref m (:* (:unsigned 16)) i) (aref src i)))))
278	(report-bad-arg decimal 'ns::ns-decimal)))
279
280	(defmethod print-object ((d ns::ns-decimal) stream)
281	(print-unreadable-object (d stream :type t :identity t)
282	(unless (%null-ptr-p d)
283	(format stream "exponent = ~d, length = ~s, is-negative = ~s, is-compact = ~s, mantissa = ~s" (ns::ns-decimal-exponent d) (ns::ns-decimal-length d) (ns::ns-decimal-is-negative d) (ns::ns-decimal-is-compact d) (ns::ns-decimal-mantissa d)))
284	(describe-macptr-allocation-and-address d stream)))
285
286
287
288
289	;;; NSRect
290
291	(define-typed-foreign-struct-class ns::ns-rect (:<NSR>ect ns::ns-rect-p ns::init-ns-rect ns::make-ns-rect ns::with-ns-rect)
292	(x ns::ns-rect-x :<NSR>ect.origin.x wrap-cg-float)
293	(y ns::ns-rect-y :<NSR>ect.origin.y wrap-cg-float)
294	(width ns::ns-rect-width :<NSR>ect.size.width wrap-cg-float)
295	(height ns::ns-rect-height :<NSR>ect.size.height wrap-cg-float))
296
297
298	(defmethod print-object ((r ns::ns-rect) stream)
299	(print-unreadable-object (r stream :type t :identity t)
300	(unless (%null-ptr-p r)
301	(flet ((maybe-round (x)
302	(multiple-value-bind (q r) (round x)
303	(if (zerop r) q x))))
304	(format stream "~s X ~s @ ~s,~s"
305	(maybe-round (ns::ns-rect-width r))
306	(maybe-round (ns::ns-rect-height r))
307	(maybe-round (ns::ns-rect-x r))
308	(maybe-round (ns::ns-rect-y r)))
309	(describe-macptr-allocation-and-address r stream)))))
310
311
312
313	;;; NSSize
314	(define-typed-foreign-struct-class ns::ns-size (:<NSS>ize ns::ns-size-p ns::init-ns-size ns::make-ns-size ns::with-ns-size)
315	(width ns::ns-size-width :<NSS>ize.width wrap-cg-float)
316	(height ns::ns-size-height :<NSS>ize.height wrap-cg-float))
317
318
319	(defmethod print-object ((s ns::ns-size) stream)
320	(flet ((maybe-round (x)
321	(multiple-value-bind (q r) (round x)
322	(if (zerop r) q x))))
323	(unless (%null-ptr-p s)
324	(print-unreadable-object (s stream :type t :identity t)
325	(format stream "~s X ~s"
326	(maybe-round (ns::ns-size-width s))
327	(maybe-round (ns::ns-size-height s)))))
328	(describe-macptr-allocation-and-address s stream)))
329
330
331	;;; NSPoint
332	(define-typed-foreign-struct-class ns::ns-point (:<NSP>oint ns::ns-point-p ns::init-ns-point ns::make-ns-point ns::with-ns-point)
333	(x ns::ns-point-x :<NSP>oint.x wrap-cg-float)
334	(y ns::ns-point-y :<NSP>oint.y wrap-cg-float))
335
336	(defmethod print-object ((p ns::ns-point) stream)
337	(flet ((maybe-round (x)
338	(multiple-value-bind (q r) (round x)
339	(if (zerop r) q x))))
340	(print-unreadable-object (p stream :type t :identity t)
341	(unless (%null-ptr-p p)
342	(format stream "~s,~s"
343	(maybe-round (ns::ns-point-x p))
344	(maybe-round (ns::ns-point-y p))))
345	(describe-macptr-allocation-and-address p stream))))
346
347
348	;;; NSRange
349	(define-typed-foreign-struct-class ns::ns-range (:<NSR>ange ns::ns-range-p ns::init-ns-range ns::make-ns-range ns::with-ns-range)
350	(location ns::ns-range-location :<NSR>ange.location)
351	(length ns::ns-range-length :<NSR>ange.length ))
352
353	(defmethod print-object ((r ns::ns-range) stream)
354	(print-unreadable-object (r stream :type t :identity t)
355	(unless (%null-ptr-p r)
356	(format stream "~s/~s"
357	(ns::ns-range-location r)
358	(ns::ns-range-length r)))
359	(describe-macptr-allocation-and-address r stream)))
360
361
362	;;; String might be stack allocated; make a copy before complaining
363	;;; about it.
364	(defun check-objc-message-name (string)
365	(dotimes (i (length string))
366	(let* ((ch (char string i)))
367	(unless (or (alpha-char-p ch)
368	(digit-char-p ch 10)
369	(eql ch #\:)
370	(eql ch #\_))
371	(error "Illegal character ~s in ObjC message name ~s"
372	ch (copy-seq string)))))
373	(when (and (position #\: string)
374	(not (eql (char string (1- (length string))) #\:)))
375	(error "ObjC message name ~s contains colons, but last character is not a colon" (copy-seq string))))
376
377
378	(setf (pkg.intern-hook (find-package "NSFUN"))
379	'get-objc-message-info)
380
381	(set-dispatch-macro-character #\# #\/
382	(lambda (stream subchar numarg)
383	(declare (ignorable subchar numarg))
384	(let* ((token (make-array 16 :element-type 'character :fill-pointer 0 :adjustable t))
385	(attrtab (rdtab.ttab readtable)))
386	(when (peek-char t stream nil nil)
387	(loop
388	(multiple-value-bind (char attr)
389	(%next-char-and-attr stream attrtab)
390	(unless (eql attr $cht_cnst)
391	(when char (unread-char char stream))
392	(return))
393	(vector-push-extend char token))))
394	(unless read-suppress
395	(unless (> (length token) 0)
396	(signal-reader-error stream "Invalid token after #/."))
397	(check-objc-message-name token)
398	(intern token "NSFUN")))))
399
400
401	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
402	;;;; Utilities ;;;;
403	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
404
405	;;; Return separate lists of the keys and values in a keyword/value list
406
407	(defun keys-and-vals (klist)
408	(when (oddp (length klist))
409	(error "Invalid keyword/value list: ~S" klist))
410	(loop for l = klist then (cddr l)
411	until (null l)
412	collect (first l) into keys
413	collect (second l) into vals
414	finally (return (values keys vals))))
415
416
417	;;; Return the typestring for an ObjC METHOD
418
419	(defun method-typestring (method)
420	(%get-cstring #+apple-objc-2.0
421	(#_method_getTypeEncoding method)
422	#-apple-objc-2.0
423	(pref method :objc_method.method_types)))
424
425
426	;;; Parse the ObjC message from a SENDxxx macro
427
428	(defun parse-message (args)
429	(let ((f (first args))
430	(nargs (length args)))
431	(cond ((or (= nargs 1) (= nargs 2))
432	;; (THING {VARGS})
433	(if (constantp f)
434	(%parse-message (cons (eval f) (rest args)))
435	(values f (rest args) nil)))
436	;; (THING1 ARG1 ... THINGN ARGN)
437	((evenp nargs)
438	(multiple-value-bind (ks vs) (keys-and-vals args)
439	(if (every #'constantp ks)
440	(%parse-message (mapcan #'list (mapcar #'eval ks) vs))
441	(values f (rest args) nil))))
442	;; (THING1 ARG1 ... THINGN ARGN VARGS)
443	(t (multiple-value-bind (ks vs) (keys-and-vals (butlast args))
444	(if (every #'constantp ks)
445	(%parse-message
446	(nconc (mapcan #'list (mapcar #'eval ks) vs) (last args)))
447	(values f (rest args) nil)))))))
448
449
450	;;; Parse the ObjC message from the evaluated args of a %SENDxxx function
451
452	(defun %parse-message (args)
453	(let ((f (first args))
454	(l (first (last args))))
455	(cond ((stringp f)
456	;; (STRING-with-N-colons ARG1 ... ARGN {LIST})
457	(let* ((n (count #\: (the simple-string f)))
458	(message-info (need-objc-message-info f))
459	(args (rest args))
460	(nargs (length args)))
461	(cond ((and (= nargs 1)
462	(getf (objc-message-info-flags message-info)
463	:accepts-varargs))
464	(values f nil l))
465	((= nargs n) (values f args nil))
466	((= nargs (1+ n)) (values f (butlast args) l))
467	(t (error "Improperly formatted argument list: ~S" args)))))
468	((keywordp f)
469	;; (KEY1 ARG1 ... KEYN ARGN {LIST}) or (KEY LIST)
470	(let ((nargs (length args)))
471	(cond ((and (= nargs 2) (consp l)
472	(let* ((info (need-objc-message-info
473	(lisp-to-objc-message (list f)))))
474	(getf (objc-message-info-flags info)
475	:accepts-varargs)))
476	(values (lisp-to-objc-message (list f)) nil l))
477	((evenp nargs)
478	(multiple-value-bind (ks vs) (keys-and-vals args)
479	(values (lisp-to-objc-message ks) vs nil)))
480	((and (> nargs 1) (listp l))
481	(multiple-value-bind (ks vs) (keys-and-vals (butlast args))
482	(values (lisp-to-objc-message ks) vs l)))
483	(t (error "Improperly formatted argument list: ~S" args)))))
484	((symbolp f)
485	;; (SYMBOL {LIST})
486	(let ((nargs (length (rest args))))
487	(cond ((= nargs 0) (values (lisp-to-objc-message (list f)) nil nil))
488	((= nargs 1) (values (lisp-to-objc-message (list f)) nil l))
489	(t (error "Improperly formatted argument list: ~S" args)))))
490	(t (error "Improperly formatted argument list: ~S" args)))))
491
492
493	;;; Return the declared type of FORM in ENV
494
495	(defun declared-type (form env)
496	(cond ((symbolp form)
497	(multiple-value-bind (ignore ignore decls)
498	(variable-information form env)
499	(declare (ignore ignore))
500	(or (cdr (assoc 'type decls)) t)))
501	((and (consp form) (eq (first form) 'the))
502	(second form))
503	(t t)))
504
505
506	;;; Return the current optimization setting of KEY in ENV
507
508	(defun optimization-setting (key &optional env)
509	(cadr (assoc key (declaration-information 'optimize env))))
510
511
512	;;; Return the ObjC class named CNAME
513
514	(defun find-objc-class (cname)
515	(%objc-class-classptr
516	(if (symbolp cname)
517	(find-class cname)
518	(load-objc-class-descriptor cname))))
519
520
521	;;; Return the class object of an ObjC object O, signalling an error
522	;;; if O is not an ObjC object
523
524	(defun objc-class-of (o)
525	(if (objc-object-p o)
526	(class-of o)
527	(progn
528	#+debug
529	(#_NSLog #@"class name = %s" :address (pref (pref o :objc_object.isa)
530	:objc_class.name))
531	(error "~S is not an ObjC object" o))))
532
533
534	;;; Returns the ObjC class corresponding to the declared type OTYPE if
535	;;; possible, NIL otherwise
536
537	(defun get-objc-class-from-declaration (otype)
538	(cond ((symbolp otype) (lookup-objc-class (lisp-to-objc-classname otype)))
539	((and (consp otype) (eq (first otype) '@metaclass))
540	(let* ((name (second otype))
541	(c
542	(typecase name
543	(string (lookup-objc-class name))
544	(symbol (lookup-objc-class (lisp-to-objc-classname name)))
545	(t (error "Improper metaclass typespec: ~S" otype)))))
546	(unless (null c) (objc-class-of c))))))
547
548
549	;;; Returns the selector of MSG
550
551	(defun get-selector (msg)
552	(%get-selector (load-objc-selector msg)))
553
554
555	;;; Get the instance method structure corresponding to SEL for CLASS
556
557	(defun get-method (class sel)
558	(let ((m (class-get-instance-method class sel)))
559	(if (%null-ptr-p m)
560	(error "Instances of ObjC class ~S cannot respond to the message ~S"
561	(objc-class-name class)
562	(lisp-string-from-sel sel))
563	m)))
564
565
566	;;; Get the class method structure corresponding to SEL for CLASS
567
568	(defun get-class-method (class sel)
569	(let ((m (class-get-class-method class sel)))
570	(if (%null-ptr-p m)
571	(error "ObjC class ~S cannot respond to the message ~S"
572	(objc-class-name class)
573	(lisp-string-from-sel sel))
574	m)))
575
576
577	;;; For some reason, these types sometimes show up as :STRUCTs even though they
578	;;; are not structure tags, but type names
579
580	(defun fudge-objc-type (ftype)
581	(if (equal ftype '(:STRUCT :<NSD>ecimal))
582	:<NSD>ecimal
583	ftype))
584
585
586	;;; Returns T if the result spec requires a STRET for its return, NIL otherwise
587	;;; RSPEC may be either a number (in which case it is interpreted as a number
588	;;; of words) or a foreign type spec acceptable to PARSE-FOREIGN-TYPE. STRETS
589	;;; must be used when a structure larger than 4 bytes is returned
590
591	(defun requires-stret-p (rspec)
592	(when (member rspec '(:DOUBLE-FLOAT :UNSIGNED-DOUBLEWORD :SIGNED-DOUBLEWORD)
593	:test #'eq)
594	(return-from requires-stret-p nil))
595	(setq rspec (fudge-objc-type rspec))
596	(if (numberp rspec)
597	(> rspec 1)
598	(> (ensure-foreign-type-bits (parse-foreign-type rspec)) target::nbits-in-word)))
599
600
601	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
602	;;;; Stret Convenience Stuff ;;;;
603	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
604
605	;;; Allocate any temporary storage necessary to hold strets required
606	;;; AT TOPLEVEL in the value forms. Special recognition is given to
607	;;; SENDs involving strets and to stret pseudo-functions
608	;;; NS-MAKE-POINT, NS-MAKE-RANGE, NS-MAKE-RECT and NS-MAKE-SIZE
609
610	(defmacro slet (varforms &body body &environment env)
611	(multiple-value-bind (clean-body decls) (parse-body body env nil)
612	(loop with r and s
613	for (var val) in varforms
614	do (multiple-value-setq (r s) (sletify val t var))
615	collect r into rvarforms
616	unless (null s) collect s into stretforms
617	finally
618	(return
619	`(rlet ,rvarforms
620	,@decls
621	,@stretforms
622	,@clean-body)))))
623
624
625	;;; Note that SLET* does not allow declarations
626
627	(defmacro slet* (varforms &body body &environment env)
628	(if (= (length varforms) 1)
629	`(slet ,varforms ,@body)
630	`(slet ,(list (first varforms))
631	(slet* ,(rest varforms) ,@body))))
632
633
634	;;; Collect the info necessary to transform a SLET into an RLET
635
636	(defun sletify (form &optional errorp (var (gensym)))
637	(if (listp form)
638	(case (first form)
639	(ns-make-point
640	(assert (= (length form) 3))
641	`(,var :<NSP>oint :x ,(second form) :y ,(third form)))
642	(ns-make-rect
643	(assert (= (length form) 5))
644	`(,var :<NSR>ect :origin.x ,(second form) :origin.y ,(third form)
645	:size.width ,(fourth form) :size.height ,(fifth form)))
646	(ns-make-range
647	(assert (= (length form) 3))
648	`(,var :<NSR>ange :location ,(second form) :length ,(third form)))
649	(ns-make-size
650	(assert (= (length form) 3))
651	`(,var :<NSS>ize :width ,(second form) :height ,(third form)))
652	(send
653	(let* ((info (get-objc-message-info (parse-message (cddr form)))))
654	(if (null info)
655	(error "Can't determine message being sent in ~s" form))
656	(let* ((rtype (objc-method-info-result-type
657	(car (objc-message-info-methods info)))))
658	(if (getf (objc-message-info-flags info) :returns-structure)
659	(values `(,var ,(if (typep rtype 'foreign-type)
660	(unparse-foreign-type rtype)
661	rtype))
662	`(send/stret ,var ,@(rest form)))
663	(if errorp
664	(error "NonSTRET SEND in ~S" form)
665	form)))))
666	(send-super
667	(let* ((info (get-objc-message-info (parse-message (cddr form)))))
668	(if (null info)
669	(error "Can't determine message being sent in ~s" form))
670	(let* ((rtype (objc-method-info-result-type
671	(car (objc-message-info-methods info)))))
672	(if (getf (objc-message-info-flags info) :returns-structure)
673	(values `(,var ,(if (typep rtype 'foreign-type)
674	(unparse-foreign-type rtype)
675	rtype))
676	`(send-super/stret ,var ,@(rest form)))
677	(if errorp
678	(error "NonSTRET SEND-SUPER in ~S" form)
679	form)))))
680	(t (if errorp
681	(error "Unrecognized STRET call in ~S" form)
682	form)))
683	(if errorp
684	(error "Unrecognized STRET call in ~S" form)
685	form)))
686
687
688	;;; Process the arguments to a message send as an implicit SLET, collecting
689	;;; the info necessary to build the corresponding RLET
690
691	(defun sletify-message-args (args)
692	(loop with svf and sif
693	for a in args
694	do (multiple-value-setq (svf sif) (sletify a))
695	unless (null sif) collect sif into sifs
696	unless (equal svf a)
697	do (setf a (first svf))
698	and collect svf into svfs
699	collect a into nargs
700	finally (return (values nargs svfs sifs))))
701
702
703	;;; Convenience macros for some common Cocoa structures. More
704	;;; could be added
705
706	(defmacro ns-max-range (r)
707	(let ((rtemp (gensym)))
708	`(let ((,rtemp ,r))
709	(+ (pref ,rtemp :<NSR>ange.location) (pref ,rtemp :<NSR>ange.length)))))
710	(defmacro ns-min-x (r) `(pref ,r :<NSR>ect.origin.x))
711	(defmacro ns-min-y (r) `(pref ,r :<NSR>ect.origin.y))
712	(defmacro ns-max-x (r)
713	(let ((rtemp (gensym)))
714	`(let ((,rtemp ,r))
715	(+ (pref ,r :<NSR>ect.origin.x)
716	(pref ,r :<NSR>ect.size.width)))))
717	(defmacro ns-max-y (r)
718	(let ((rtemp (gensym)))
719	`(let ((,rtemp ,r))
720	(+ (pref ,r :<NSR>ect.origin.y)
721	(pref ,r :<NSR>ect.size.height)))))
722	(defmacro ns-mid-x (r)
723	(let ((rtemp (gensym)))
724	`(let ((,rtemp ,r))
725	(* 0.5 (+ (ns-min-x ,rtemp) (ns-max-x ,rtemp))))))
726	(defmacro ns-mid-y (r)
727	(let ((rtemp (gensym)))
728	`(let ((,rtemp ,r))
729	(* 0.5 (+ (ns-min-y ,rtemp) (ns-max-y ,rtemp))))))
730	(defmacro ns-height (r) `(pref ,r :<NSR>ect.size.height))
731	(defmacro ns-width (r) `(pref ,r :<NSR>ect.size.width))
732
733
734	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
735	;;;; Type Stuff ;;;;
736	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
737
738
739
740	(defvar objc-message-info (make-hash-table :test #'equal :size 800))
741
742	(defun result-type-requires-structure-return (result-type)
743	;; Use objc-msg-send-stret for all methods that return
744	;; record types.
745	(or (typep result-type 'foreign-record-type)
746	(and (not (typep result-type 'foreign-type))
747	(typep (parse-foreign-type result-type) 'foreign-record-type))))
748
749	(defvar objc-method-signatures (make-hash-table :test #'equal))
750
751	(defstruct objc-method-signature-info
752	type-signature
753	function
754	super-function)
755
756	(defun objc-method-signature-info (sig)
757	(or (gethash sig objc-method-signatures)
758	(setf (gethash sig objc-method-signatures)
759	(make-objc-method-signature-info
760	:type-signature sig
761	:function (compile-send-function-for-signature sig)
762	:super-function (%compile-send-function-for-signature sig t)))))
763
764	(defun concise-foreign-type (ftype)
765	(if (typep ftype 'foreign-record-type)
766	(let* ((name (foreign-record-type-name ftype)))
767	(if name
768	`(,(foreign-record-type-kind ftype) ,name)
769	(unparse-foreign-type ftype)))
770	(if (objc-id-type-p ftype)
771	:id
772	(if (typep ftype 'foreign-pointer-type)
773	(let* ((to (foreign-pointer-type-to ftype)))
774	(if (null to)
775	'(:* :void)
776	`(:* ,(concise-foreign-type to))))
777	(if (typep ftype 'foreign-type)
778	(unparse-foreign-type ftype)
779	ftype)))))
780
781
782	;;; Not a perfect mechanism.
783	(defclass objc-dispatch-function (funcallable-standard-object)
784	()
785	(:metaclass funcallable-standard-class))
786
787	(defmethod print-object ((o objc-dispatch-function) stream)
788	(print-unreadable-object (o stream :type t :identity t)
789	(let* ((name (function-name o)))
790	(when name
791	(format stream "~s" name)))))
792
793
794
795
796	(declaim (inline check-receiver))
797
798	;;; Return a NULL pointer if RECEIVER is a null pointer.
799	;;; Otherwise, insist that it's an ObjC object of some sort, and return NIL.
800	(defun check-receiver (receiver)
801	(if (%null-ptr-p receiver)
802	(%null-ptr)
803	(let* ((domain (%macptr-domain receiver))
804	(valid (eql domain objc-object-domain)))
805	(declare (fixnum domain))
806	(when (zerop domain)
807	(if (recognize-objc-object receiver)
808	(progn (%set-macptr-domain receiver objc-object-domain)
809	(setq valid t))))
810	(unless valid
811	(report-bad-arg receiver 'objc:objc-object)))))
812
813	(defmethod shared-initialize :after ((gf objc-dispatch-function) slot-names &key message-info &allow-other-keys)
814	(declare (ignore slot-names))
815	(if message-info
816	(let* ((ambiguous-methods (getf (objc-message-info-flags message-info) :ambiguous))
817	(selector (objc-message-info-selector message-info))
818	(first-method (car (objc-message-info-methods message-info))))
819	(lfun-bits gf (dpb (1+ (objc-message-info-req-args message-info))
820	$lfbits-numreq
821	(logior (ash
822	(if (getf (objc-message-info-flags message-info)
823	:accepts-varargs)
824	1
825	0)
826	$lfbits-rest-bit)
827	(logandc2 (lfun-bits gf) (ash 1 $lfbits-aok-bit)))))
828	(flet ((signature-function-for-method (m)
829	(let* ((signature-info (objc-method-info-signature-info m)))
830	(or (objc-method-signature-info-function signature-info)
831	(setf (objc-method-signature-info-function signature-info)
832	(compile-send-function-for-signature
833	(objc-method-signature-info-type-signature signature-info)))))))
834
835	(if (null ambiguous-methods)
836	;; Pick an arbitrary method, since all methods have the same
837	;; signature.
838	(let* ((function (signature-function-for-method first-method)))
839	(set-funcallable-instance-function
840	gf
841	(nfunction
842	send-unambiguous-message
843	(lambda (receiver &rest args)
844	(declare (dynamic-extent args))
845	(or (check-receiver receiver)
846	(with-ns-exceptions-as-errors
847	(apply function receiver selector args)))))))
848	(let* ((protocol-pairs (mapcar #'(lambda (pm)
849	(cons (lookup-objc-protocol
850	(objc-method-info-class-name pm))
851	(signature-function-for-method
852	pm)))
853	(objc-message-info-protocol-methods message-info)))
854	(method-pairs (mapcar #'(lambda (group)
855	(cons (mapcar #'(lambda (m)
856	(get-objc-method-info-class m))
857	group)
858	(signature-function-for-method (car group))))
859	(objc-message-info-ambiguous-methods message-info)))
860	(default-function (if method-pairs
861	(prog1 (cdar (last method-pairs))
862	(setq method-pairs (nbutlast method-pairs)))
863	(prog1 (cdr (last protocol-pairs))
864	(setq protocol-pairs (nbutlast protocol-pairs))))))
865	(set-funcallable-instance-function
866	gf
867	(nfunction
868	send-unambiguous-message
869	(lambda (receiver &rest args)
870	(declare (dynamic-extent args))
871	(or (check-receiver receiver)
872	(let* ((function
873	(or (dolist (pair protocol-pairs)
874	(when (conforms-to-protocol receiver (car pair))
875	(return (cdr pair))))
876	(block m
877	(dolist (pair method-pairs default-function)
878	(dolist (class (car pair))
879	(when (typep receiver class)
880	(return-from m (cdr pair)))))))))
881	(with-ns-exceptions-as-errors
882	(apply function receiver selector args)))))))))))
883	(with-slots (name) gf
884	(set-funcallable-instance-function
885	gf
886	#'(lambda (&rest args)
887	(error "Unknown ObjC message ~a called with arguments ~s"
888	(symbol-name name) args))))))
889
890
891	(defun %call-next-objc-method (self class selector sig &rest args)
892	(declare (dynamic-extent args))
893	(rlet ((s :objc_super #+apple-objc :receiver #+gnu-objc :self self
894	#+apple-objc-2.0 :super_class #-apple-objc-2.0 :class
895	#+apple-objc-2.0 (#_class_getSuperclass class)
896	#-apple-objc-2.0 (pref class :objc_class.super_class)))
897	(let* ((siginfo (objc-method-signature-info sig))
898	(function (or (objc-method-signature-info-super-function siginfo)
899	(setf (objc-method-signature-info-super-function siginfo)
900	(%compile-send-function-for-signature sig t)))))
901	(with-ns-exceptions-as-errors
902	(apply function s selector args)))))
903
904
905	(defun %call-next-objc-class-method (self class selector sig &rest args)
906	(rlet ((s :objc_super #+apple-objc :receiver #+gnu-objc :self self
907	#+apple-objc-2.0 :super_class #-apple-objc-2.0 :class
908	#+apple-objc-2.0 (#_class_getSuperclass (pref class :objc_class.isa))
909	#-apple-objc-2.0 (pref (pref class #+apple-objc :objc_class.isa #+gnu-objc :objc_class.class_pointer) :objc_class.super_class)))
910	(let* ((siginfo (objc-method-signature-info sig))
911	(function (or (objc-method-signature-info-super-function siginfo)
912	(setf (objc-method-signature-info-super-function siginfo)
913	(%compile-send-function-for-signature sig t)))))
914	(with-ns-exceptions-as-errors
915	(apply function s selector args)))))
916
917	(defun postprocess-objc-message-info (message-info)
918	(let* ((objc-name (objc-message-info-message-name message-info))
919	(lisp-name (or (objc-message-info-lisp-name message-info)
920	(setf (objc-message-info-lisp-name message-info)
921	(compute-objc-to-lisp-function-name objc-name))))
922	(gf (or (fboundp lisp-name)
923	(setf (fdefinition lisp-name)
924	(make-instance 'objc-dispatch-function :name lisp-name)))))
925
926	(unless (objc-message-info-selector message-info)
927	(setf (objc-message-info-selector message-info)
928	(ensure-objc-selector (objc-message-info-message-name message-info))))
929
930	(flet ((reduce-to-ffi-type (ftype)
931	(concise-foreign-type ftype)))
932	(flet ((ensure-method-signature (m)
933	(or (objc-method-info-signature m)
934	(setf (objc-method-info-signature m)
935	(let* ((sig
936	(cons (reduce-to-ffi-type
937	(objc-method-info-result-type m))
938	(mapcar #'reduce-to-ffi-type
939	(objc-method-info-arglist m)))))
940	(setf (objc-method-info-signature-info m)
941	(objc-method-signature-info sig))
942	sig)))))
943	(let* ((methods (objc-message-info-methods message-info))
944	(signatures ())
945	(protocol-methods)
946	(signature-alist ()))
947	(labels ((signatures-equal (xs ys)
948	(and xs
949	ys
950	(do* ((xs xs (cdr xs))
951	(ys ys (cdr ys)))
952	((null xs) (null ys))
953	(unless (foreign-type-= (ensure-foreign-type (car xs))
954	(ensure-foreign-type (car ys)))
955	(return nil))))))
956	(dolist (m methods)
957	(let* ((signature (ensure-method-signature m)))
958	(pushnew signature signatures :test #'signatures-equal)
959	(if (getf (objc-method-info-flags m) :protocol)
960	(push m protocol-methods)
961	(let* ((pair (assoc signature signature-alist :test #'signatures-equal)))
962	(if pair
963	(push m (cdr pair))
964	(push (cons signature (list m)) signature-alist)))))))
965	(setf (objc-message-info-ambiguous-methods message-info)
966	(mapcar #'cdr
967	(sort signature-alist
968	#'(lambda (x y)
969	(< (length (cdr x))
970	(length (cdr y)))))))
971	(setf (objc-message-info-flags message-info) nil)
972	(setf (objc-message-info-protocol-methods message-info)
973	protocol-methods)
974	(when (cdr signatures)
975	(setf (getf (objc-message-info-flags message-info) :ambiguous) t))
976	(let* ((first-method (car methods))
977	(first-sig (objc-method-info-signature first-method))
978	(first-sig-len (length first-sig)))
979	(setf (objc-message-info-req-args message-info)
980	(1- first-sig-len))
981	;; Whether some arg/result types vary or not, we want to insist
982	;; on (a) either no methods take a variable number of arguments,
983	;; or all do, and (b) either no method uses structure-return
984	;; conventions, or all do. (It's not clear that these restrictions
985	;; are entirely reasonable in the long run; in the short term,
986	;; they'll help get things working.)
987	(flet ((method-returns-structure (m)
988	(result-type-requires-structure-return
989	(objc-method-info-result-type m)))
990	(method-accepts-varargs (m)
991	(eq (car (last (objc-method-info-arglist m)))
992	void-foreign-type))
993	(method-has-structure-arg (m)
994	(dolist (arg (objc-method-info-arglist m))
995	(when (typep (ensure-foreign-type arg) 'foreign-record-type)
996	(return t)))))
997	(when (dolist (method methods)
998	(when (method-has-structure-arg method)
999	(return t)))
1000	(setf (compiler-macro-function lisp-name)
1001	'hoist-struct-constructors))
1002	(let* ((first-result-is-structure (method-returns-structure first-method))
1003	(first-accepts-varargs (method-accepts-varargs first-method)))
1004	(if (dolist (m (cdr methods) t)
1005	(unless (eq (method-returns-structure m)
1006	first-result-is-structure)
1007	(return nil)))
1008	(if first-result-is-structure
1009	(setf (getf (objc-message-info-flags message-info)
1010	:returns-structure) t)))
1011	(if (dolist (m (cdr methods) t)
1012	(unless (eq (method-accepts-varargs m)
1013	first-accepts-varargs)
1014	(return nil)))
1015	(if first-accepts-varargs
1016	(progn
1017	(setf (getf (objc-message-info-flags message-info)
1018	:accepts-varargs) t)
1019	(decf (objc-message-info-req-args message-info)))))))))
1020	(reinitialize-instance gf :message-info message-info)))))
1021
1022	;;; -may- need to invalidate cached info whenever new interface files
1023	;;; are made accessible. Probably the right thing to do is to insist
1024	;;; that (known) message signatures be updated in that case.
1025	(defun get-objc-message-info (message-name &optional (use-database t))
1026	(setq message-name (string message-name))
1027	(or (gethash message-name objc-message-info)
1028	(and use-database
1029	(let* ((info (lookup-objc-message-info message-name)))
1030	(when info
1031	(setf (gethash message-name objc-message-info) info)
1032	(postprocess-objc-message-info info)
1033	info)))))
1034
1035	(defun need-objc-message-info (message-name)
1036	(or (get-objc-message-info message-name)
1037	(error "Undeclared message: ~s" message-name)))
1038
1039	;;; Should be called after using new interfaces that may define
1040	;;; new methods on existing messages.
1041	(defun update-objc-method-info ()
1042	(maphash #'(lambda (message-name info)
1043	(lookup-objc-message-info message-name info)
1044	(postprocess-objc-message-info info))
1045	objc-message-info))
1046
1047
1048	;;; Of the method declarations (OBJC-METHOD-INFO structures) associated
1049	;;; with the message-declaration (OBJC-MESSAGE-INFO structure) M,
1050	;;; return the one that seems to be applicable for the object O.
1051	;;; (If there's no ambiguity among the declared methods, any method
1052	;;; will do; this just tells runtime %SEND functions how to compose
1053	;;; an %FF-CALL).
1054	(defun %lookup-objc-method-info (m o)
1055	(let* ((methods (objc-message-info-methods m))
1056	(ambiguous (getf (objc-message-info-flags m) :ambiguous)))
1057	(if (not ambiguous)
1058	(car methods)
1059	(or
1060	(dolist (method methods)
1061	(let* ((mclass (get-objc-method-info-class method)))
1062	(if (typep o mclass)
1063	(return method))))
1064	(error "Can't determine ObjC method type signature for message ~s, object ~s" (objc-message-info-message-name m) o)))))
1065
1066	(defun resolve-existing-objc-method-info (message-info class-name class-p result-type args)
1067	(let* ((method-info (dolist (m (objc-message-info-methods message-info))
1068	(when (and (eq (getf (objc-method-info-flags m) :class-p)
1069	class-p)
1070	(equal (objc-method-info-class-name m)
1071	class-name))
1072	(return m)))))
1073	(when method-info
1074	(unless (and (foreign-type-= (ensure-foreign-type (objc-method-info-result-type method-info))
1075	(parse-foreign-type result-type))
1076	(do* ((existing (objc-method-info-arglist method-info) (cdr existing))
1077	(proposed args (cdr proposed)))
1078	((null existing) (null proposed))
1079	(unless (foreign-type-= (ensure-foreign-type (car existing))
1080	(parse-foreign-type (car proposed)))
1081	(return nil))))
1082	(cerror "Redefine existing method to have new type signature."
1083	"The method ~c[~a ~a] is already declared to have type signature ~s; the new declaration ~s is incompatible." (if class-p #\+ #\-) class-name (objc-message-info-message-name message-info) (objc-method-info-signature method-info) (cons result-type args))
1084	(setf (objc-method-info-arglist method-info) args
1085	(objc-method-info-result-type method-info) result-type
1086	(objc-method-info-signature method-info) nil
1087	(objc-method-info-signature-info method-info) nil))
1088	method-info)))
1089
1090	(defvar objc-verbose nil)
1091
1092	;;; Still not right; we have to worry about type conflicts with
1093	;;; shadowed methods, as well.
1094	(defun %declare-objc-method (message-name class-name class-p result-type args)
1095	(let* ((info (get-objc-message-info message-name)))
1096	(unless info
1097	(when (or objc-verbose compile-print)
1098	(format error-output "~&; Note: defining new ObjC message ~c[~a ~a]" (if class-p #\+ #\-) class-name message-name))
1099	(setq info (make-objc-message-info :message-name message-name))
1100	(setf (gethash message-name objc-message-info) info))
1101	(let* ((was-ambiguous (getf (objc-message-info-flags info) :ambiguous))
1102	(method-info (or (resolve-existing-objc-method-info info class-name class-p result-type args)
1103	(make-objc-method-info :message-info info
1104	:class-name class-name
1105	:result-type result-type
1106	:arglist args
1107	:flags (if class-p '(:class t))))))
1108	(pushnew method-info (objc-message-info-methods info))
1109	(postprocess-objc-message-info info)
1110	(if (and (getf (objc-message-info-flags info) :ambiguous)
1111	(not was-ambiguous))
1112	(warn "previously declared methods on ~s all had the same type signature, but ~s introduces ambiguity" message-name method-info))
1113
1114	(objc-method-info-signature method-info))))
1115
1116
1117
1118	;;; TRANSLATE-FOREIGN-ARG-TYPE doesn't accept :VOID
1119
1120	(defun translate-foreign-result-type (ftype)
1121	(ensure-foreign-type-bits (parse-foreign-type ftype))
1122	(if (eq ftype :void)
1123	:void
1124	(translate-foreign-arg-type ftype)))
1125
1126
1127
1128
1129
1130	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1131	;;;; Invoking ObjC Methods ;;;;
1132	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1133
1134
1135	;;; The SEND and SEND/STRET macros
1136
1137	(defmacro send (o msg &rest args &environment env)
1138	(make-optimized-send o msg args env))
1139
1140	(defmacro send/stret (s o msg &rest args &environment env)
1141	(make-optimized-send o msg args env s))
1142
1143
1144
1145
1146	;;; Optimize special cases of SEND and SEND/STRET
1147
1148	(defun make-optimized-send (o msg args env &optional s super sclassname)
1149	(multiple-value-bind (msg args vargs) (parse-message (cons msg args))
1150	(let* ((message-info (get-objc-message-info msg)))
1151	(if (null message-info)
1152	(error "Unknown message: ~S" msg))
1153	;; If a vararg exists, make sure that the message can accept it
1154	(when (and vargs (not (getf (objc-message-info-flags message-info)
1155	:accepts-varargs)))
1156	(error "Message ~S cannot accept a variable number of arguments" msg))
1157	(unless (= (length args) (objc-message-info-req-args message-info))
1158	(error "Message ~S requires ~a ~d args, but ~d were provided."
1159	msg
1160	(if vargs "at least" "exactly")
1161	(objc-message-info-req-args message-info)
1162	(length args)))
1163	(multiple-value-bind (args svarforms sinitforms) (sletify-message-args args)
1164	(let* ((ambiguous (getf (objc-message-info-flags message-info) :ambiguous))
1165	(methods (objc-message-info-methods message-info))
1166	(method (if (not ambiguous) (car methods))))
1167	(when ambiguous
1168	(let* ((class (if sclassname
1169	(find-objc-class sclassname)
1170	(get-objc-class-from-declaration (declared-type o env)))))
1171	(if class
1172	(dolist (m methods)
1173	(unless (getf (objc-method-info-flags m) :protocol)
1174	(let* ((mclass (or (get-objc-method-info-class m)
1175	(error "Can't find ObjC class named ~s"
1176	(objc-method-info-class-name m)))))
1177	(when (and class (subtypep class mclass))
1178	(return (setq method m)))))))))
1179	(if method
1180	(build-call-from-method-info method
1181	args
1182	vargs
1183	o
1184	msg
1185	svarforms
1186	sinitforms
1187	s
1188	super)
1189	(build-ambiguous-send-form message-info
1190	args
1191	vargs
1192	o
1193	msg
1194	svarforms
1195	sinitforms
1196	s
1197	super)))))))
1198
1199
1200	;;; WITH-NS-EXCEPTIONS-AS-ERRORS is only available in OpenMCL 0.14 and above
1201
1202	#-openmcl-native-threads
1203	(defmacro with-ns-exceptions-as-errors (&body body)
1204	`(progn ,@body))
1205
1206
1207	;;; Return a call to the method specified by SEL on object O, with the args
1208	;;; specified by ARGSPECS. This decides whether a normal or stret call is
1209	;;; needed and, if the latter, uses the memory S to hold the result. If SUPER
1210	;;; is nonNIL, then this builds a send to super. Finally, this also
1211	;;; coerces return #$YES/#$NO values to T/NIL. The entire call takes place
1212	;;; inside an implicit SLET.
1213
1214	(defun build-call (o sel msg argspecs svarforms sinitforms &optional s super)
1215	`(with-ns-exceptions-as-errors
1216	(rlet ,svarforms
1217	,@sinitforms
1218	,(let ((rspec (first (last argspecs))))
1219	(if (requires-stret-p rspec)
1220	(if (null s)
1221	;; STRET required but not provided
1222	(error "The message ~S must be sent using SEND/STRET" msg)
1223	;; STRET required and provided, use stret send
1224	(if (null super)
1225	;; Regular stret send
1226	`(progn
1227	(objc-message-send-stret ,s ,o ,(cadr sel)
1228	,@(append (butlast argspecs) (list :void)))
1229	,s)
1230	;; Super stret send
1231	`(progn
1232	(objc-message-send-super-stret ,s ,super ,(cadr sel)
1233	,@(append (butlast argspecs) (list :void)))
1234	,s)))
1235	(if (null s)
1236	;; STRET not required and not provided, use send
1237	(if (null super)
1238	;; Regular send
1239	(if (eq rspec :<BOOL>)
1240	`(coerce-from-bool
1241	(objc-message-send ,o ,(cadr sel) ,@argspecs))
1242	`(objc-message-send ,o ,(cadr sel) ,@argspecs))
1243	;; Super send
1244	(if (eq rspec :<BOOL>)
1245	`(coerce-from-bool
1246	(objc-message-send-super ,super ,(cadr sel) ,@argspecs))
1247	`(objc-message-send-super ,super ,(cadr sel) ,@argspecs)))
1248	;; STRET not required but provided
1249	(error "The message ~S must be sent using SEND" msg)))))))
1250
1251	(defun objc-id-type-p (foreign-type)
1252	(and (typep foreign-type 'foreign-pointer-type)
1253	(let* ((to (foreign-pointer-type-to foreign-type)))
1254	(and (typep to 'foreign-record-type)
1255	(eq :struct (foreign-record-type-kind to))
1256	(not (null (progn (ensure-foreign-type-bits to) (foreign-record-type-fields to))))
1257	(let* ((target (foreign-record-field-type (car (foreign-record-type-fields to)))))
1258	(and (typep target 'foreign-pointer-type)
1259	(let* ((target-to (foreign-pointer-type-to target)))
1260	(and (typep target-to 'foreign-record-type)
1261	(eq :struct (foreign-record-type-kind target-to))
1262	(eq :objc_class (foreign-record-type-name target-to))))))))))
1263
1264	(defun unique-objc-classes-in-method-info-list (method-info-list)
1265	(if (cdr method-info-list) ; if more than 1 class
1266	(flet ((subclass-of-some-other-class (c)
1267	(let* ((c-class (get-objc-method-info-class c)))
1268	(dolist (other method-info-list)
1269	(unless (eq other c)
1270	(when (subtypep c-class (get-objc-method-info-class other))
1271	(return t)))))))
1272	(remove-if #'subclass-of-some-other-class method-info-list))
1273	method-info-list))
1274
1275	(defun get-objc-method-info-class (method-info)
1276	(or (objc-method-info-class-pointer method-info)
1277	(setf (objc-method-info-class-pointer method-info)
1278	(let* ((c (lookup-objc-class (objc-method-info-class-name method-info) nil)))
1279	(when c
1280	(let* ((meta-p (getf (objc-method-info-flags method-info) :class)))
1281	(if meta-p
1282	(with-macptrs ((m (pref c :objc_class.isa)))
1283	(canonicalize-registered-metaclass m))
1284	(canonicalize-registered-class c))))))))
1285
1286	;;; Generate some sort of CASE or COND to handle an ambiguous message
1287	;;; send (where the signature of the FF-CALL depends on the type of the
1288	;;; receiver.)
1289	;;; AMBIGUOUS-METHODS is a list of lists of OBJC-METHOD-INFO structures,
1290	;;; where the methods in each sublist share the same type signature. It's
1291	;;; sorted so that more unique method/signature combinations appear first
1292	;;; (and are easier to special-case via TYPECASE.)
1293	(defun build-send-case (ambiguous-methods
1294	args
1295	vargs
1296	receiver
1297	msg
1298	s
1299	super
1300	protocol-methods)
1301	(flet ((method-class-name (m)
1302	(let* ((mclass (get-objc-method-info-class m)))
1303	(unless mclass
1304	(error "Can't find class with ObjC name ~s"
1305	(objc-method-info-class-name m)))
1306	(class-name mclass))))
1307
1308	(collect ((clauses))
1309	(let* ((protocol (gensym))
1310	(protocol-address (gensym)))
1311	(dolist (method protocol-methods)
1312	(let* ((protocol-name (objc-method-info-class-name method)))
1313	(clauses `((let* ((,protocol (lookup-objc-protocol ,protocol-name))
1314	(,protocol-address (and ,protocol (objc-protocol-address ,protocol))))
1315	(and ,protocol-address
1316	(objc-message-send ,receiver
1317	"conformsToProtocol:"
1318	:address ,protocol-address
1319	:<BOOL>)))
1320	,(build-internal-call-from-method-info
1321	method args vargs receiver msg s super))))))
1322	(do* ((methods ambiguous-methods (cdr methods)))
1323	((null (cdr methods))
1324	(when ambiguous-methods
1325	(clauses `(t
1326	,(build-internal-call-from-method-info
1327	(caar methods) args vargs receiver msg s super)))))
1328	(clauses `(,(if (cdar methods)
1329	`(or ,@(mapcar #'(lambda (m)
1330	`(typep ,receiver
1331	',(method-class-name m)))
1332	(unique-objc-classes-in-method-info-list
1333	(car methods))))
1334	`(typep ,receiver ',(method-class-name (caar methods))))
1335	,(build-internal-call-from-method-info
1336	(caar methods) args vargs receiver msg s super))))
1337	`(cond
1338	,@(clauses)))))
1339
1340	(defun build-ambiguous-send-form (message-info args vargs o msg svarforms sinitforms s super)
1341	(let* ((receiver (gensym))
1342	(caseform (build-send-case
1343	(objc-message-info-ambiguous-methods message-info)
1344	args
1345	vargs
1346	receiver
1347	msg
1348	s
1349	super
1350	(objc-message-info-protocol-methods message-info))))
1351	`(with-ns-exceptions-as-errors
1352	(rlet ,svarforms
1353	,@sinitforms
1354	(let* ((,receiver ,o))
1355	,caseform)))))
1356
1357
1358	;;; Generate the "internal" part of a method call; the "external" part
1359	;;; has established ObjC exception handling and handled structure-return
1360	;; details
1361	(defun build-internal-call-from-method-info (method-info args vargs o msg s super)
1362	(let* ((arglist ()))
1363	(collect ((specs))
1364	(do* ((args args (cdr args))
1365	(argtypes (objc-method-info-arglist method-info) (cdr argtypes))
1366	(reptypes (cdr (objc-method-info-signature method-info)) (cdr reptypes)))
1367	((null args) (setq arglist (append (specs) vargs)))
1368	(let* ((reptype (if (objc-id-type-p (car argtypes)) :id (car reptypes)))
1369	(arg (car args)))
1370	(specs reptype)
1371	(specs arg)))
1372	;;(break "~& arglist = ~s" arglist)
1373	(if (result-type-requires-structure-return
1374	(objc-method-info-result-type method-info))
1375	(if (null s)
1376	;; STRET required but not provided
1377	(error "The message ~S must be sent using SEND/STRET" msg)
1378	(if (null super)
1379	`(objc-message-send-stret ,s ,o ,msg ,@arglist ,(car (objc-method-info-signature method-info)))
1380	`(objc-message-send-super-stret ,s ,super ,msg ,@arglist ,(car (objc-method-info-signature method-info)))))
1381	(if s
1382	;; STRET provided but not required
1383	(error "The message ~S must be sent using SEND" msg)
1384	(let* ((result-spec (car (objc-method-info-signature method-info)))
1385	(form (if super
1386	`(objc-message-send-super ,super ,msg ,@arglist ,result-spec)
1387	`(objc-message-send ,o ,msg ,@arglist ,result-spec))))
1388	form))))))
1389
1390	(defun build-call-from-method-info (method-info args vargs o msg svarforms sinitforms s super)
1391	`(with-ns-exceptions-as-errors
1392	(rlet ,svarforms
1393	,@sinitforms
1394	,(build-internal-call-from-method-info
1395	method-info
1396	args
1397	vargs
1398	o
1399	msg
1400	s
1401	super))))
1402
1403
1404
1405	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1406	;;;; Instantiating ObjC Class ;;;;
1407	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1408
1409	;;; A MAKE-INSTANCE like interface to ObjC object creation
1410
1411	(defun make-objc-instance (cname &rest initargs)
1412	(declare (dynamic-extent initargs))
1413	(multiple-value-bind (ks vs) (keys-and-vals initargs)
1414	(declare (dynamic-extent ks vs))
1415	(let* ((class (etypecase cname
1416	(string (canonicalize-registered-class
1417	(find-objc-class cname)))
1418	(symbol (find-class cname))
1419	(class cname))))
1420	(send-objc-init-message (#/alloc class) ks vs))))
1421
1422
1423
1424
1425
1426	;;; Provide the BRIDGE module
1427
1428	(provide "BRIDGE")

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