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88e17b57 | 1 | /* The implementation of class Object for Objective-C. |
748086b7 | 2 | Copyright (C) 1993, 1994, 1995, 1997, 2002, 2009 Free Software Foundation, Inc. |
88e17b57 | 3 | |
6c82ad25 | 4 | This file is part of GCC. |
88e17b57 | 5 | |
6c82ad25 | 6 | GCC is free software; you can redistribute it and/or modify it |
88e17b57 | 7 | under the terms of the GNU General Public License as published by the |
748086b7 | 8 | Free Software Foundation; either version 3, or (at your option) any |
88e17b57 BE |
9 | later version. |
10 | ||
6c82ad25 | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT |
88e17b57 BE |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | License for more details. | |
15 | ||
748086b7 JJ |
16 | Under Section 7 of GPL version 3, you are granted additional |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
88e17b57 | 19 | |
748086b7 JJ |
20 | You should have received a copy of the GNU General Public License and |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
88e17b57 | 24 | |
6dead247 | 25 | #include "objc-private/common.h" |
88e17b57 | 26 | #include <stdarg.h> |
b15b7ef8 | 27 | #include <errno.h> |
88e17b57 BE |
28 | #include "objc/Object.h" |
29 | #include "objc/Protocol.h" | |
30 | #include "objc/objc-api.h" | |
31 | ||
88e17b57 BE |
32 | @implementation Object |
33 | ||
34 | + initialize | |
35 | { | |
36 | return self; | |
37 | } | |
38 | ||
39 | - init | |
40 | { | |
41 | return self; | |
42 | } | |
43 | ||
44 | + new | |
45 | { | |
46 | return [[self alloc] init]; | |
47 | } | |
48 | ||
49 | + alloc | |
50 | { | |
51 | return class_create_instance(self); | |
52 | } | |
53 | ||
54 | - free | |
55 | { | |
56 | return object_dispose(self); | |
57 | } | |
58 | ||
59 | - copy | |
60 | { | |
61 | return [[self shallowCopy] deepen]; | |
62 | } | |
63 | ||
64 | - shallowCopy | |
65 | { | |
66 | return object_copy(self); | |
67 | } | |
68 | ||
69 | - deepen | |
70 | { | |
71 | return self; | |
72 | } | |
73 | ||
74 | - deepCopy | |
75 | { | |
76 | return [self copy]; | |
77 | } | |
78 | ||
79 | - (Class)class | |
80 | { | |
81 | return object_get_class(self); | |
82 | } | |
83 | ||
84 | - (Class)superClass | |
85 | { | |
86 | return object_get_super_class(self); | |
87 | } | |
88 | ||
89 | - (MetaClass)metaClass | |
90 | { | |
91 | return object_get_meta_class(self); | |
92 | } | |
93 | ||
94 | - (const char *)name | |
95 | { | |
96 | return object_get_class_name(self); | |
97 | } | |
98 | ||
99 | - self | |
100 | { | |
101 | return self; | |
102 | } | |
103 | ||
104 | - (unsigned int)hash | |
105 | { | |
106 | return (size_t)self; | |
107 | } | |
108 | ||
109 | - (BOOL)isEqual:anObject | |
110 | { | |
111 | return self==anObject; | |
112 | } | |
113 | ||
c24aadf3 | 114 | - (int)compare:(id)anotherObject; |
88e17b57 BE |
115 | { |
116 | if ([self isEqual:anotherObject]) | |
117 | return 0; | |
118 | // Ordering objects by their address is pretty useless, | |
119 | // so subclasses should override this is some useful way. | |
b15b7ef8 | 120 | else if ((id)self > anotherObject) |
88e17b57 BE |
121 | return 1; |
122 | else | |
123 | return -1; | |
124 | } | |
125 | ||
126 | - (BOOL)isMetaClass | |
127 | { | |
128 | return NO; | |
129 | } | |
130 | ||
131 | - (BOOL)isClass | |
132 | { | |
133 | return object_is_class(self); | |
134 | } | |
135 | ||
136 | - (BOOL)isInstance | |
137 | { | |
138 | return object_is_instance(self); | |
139 | } | |
140 | ||
141 | - (BOOL)isKindOf:(Class)aClassObject | |
142 | { | |
143 | Class class; | |
144 | ||
145 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
146 | if (class==aClassObject) | |
147 | return YES; | |
148 | return NO; | |
149 | } | |
150 | ||
151 | - (BOOL)isMemberOf:(Class)aClassObject | |
152 | { | |
153 | return self->isa==aClassObject; | |
154 | } | |
155 | ||
156 | - (BOOL)isKindOfClassNamed:(const char *)aClassName | |
157 | { | |
158 | Class class; | |
159 | ||
160 | if (aClassName!=NULL) | |
161 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
162 | if (!strcmp(class_get_class_name(class), aClassName)) | |
163 | return YES; | |
164 | return NO; | |
165 | } | |
166 | ||
167 | - (BOOL)isMemberOfClassNamed:(const char *)aClassName | |
168 | { | |
169 | return ((aClassName!=NULL) | |
170 | &&!strcmp(class_get_class_name(self->isa), aClassName)); | |
171 | } | |
172 | ||
173 | + (BOOL)instancesRespondTo:(SEL)aSel | |
174 | { | |
175 | return class_get_instance_method(self, aSel)!=METHOD_NULL; | |
176 | } | |
177 | ||
178 | - (BOOL)respondsTo:(SEL)aSel | |
179 | { | |
180 | return ((object_is_instance(self) | |
181 | ?class_get_instance_method(self->isa, aSel) | |
182 | :class_get_class_method(self->isa, aSel))!=METHOD_NULL); | |
183 | } | |
184 | ||
185 | + (IMP)instanceMethodFor:(SEL)aSel | |
186 | { | |
187 | return method_get_imp(class_get_instance_method(self, aSel)); | |
188 | } | |
189 | ||
190 | // Indicates if the receiving class or instance conforms to the given protocol | |
191 | // not usually overridden by subclasses | |
192 | // | |
193 | // Modified 9/5/94 to always search the class object's protocol list, rather | |
194 | // than the meta class. | |
195 | ||
196 | + (BOOL) conformsTo: (Protocol*)aProtocol | |
197 | { | |
8f8c44cb | 198 | size_t i; |
88e17b57 BE |
199 | struct objc_protocol_list* proto_list; |
200 | id parent; | |
201 | ||
202 | for (proto_list = ((Class)self)->protocols; | |
203 | proto_list; proto_list = proto_list->next) | |
204 | { | |
205 | for (i=0; i < proto_list->count; i++) | |
206 | { | |
207 | if ([proto_list->list[i] conformsTo: aProtocol]) | |
208 | return YES; | |
209 | } | |
210 | } | |
211 | ||
212 | if ((parent = [self superClass])) | |
213 | return [parent conformsTo: aProtocol]; | |
214 | else | |
215 | return NO; | |
216 | } | |
217 | ||
218 | - (BOOL) conformsTo: (Protocol*)aProtocol | |
219 | { | |
220 | return [[self class] conformsTo:aProtocol]; | |
221 | } | |
222 | ||
223 | - (IMP)methodFor:(SEL)aSel | |
224 | { | |
225 | return (method_get_imp(object_is_instance(self) | |
226 | ?class_get_instance_method(self->isa, aSel) | |
227 | :class_get_class_method(self->isa, aSel))); | |
228 | } | |
229 | ||
230 | + (struct objc_method_description *)descriptionForInstanceMethod:(SEL)aSel | |
231 | { | |
232 | return ((struct objc_method_description *) | |
233 | class_get_instance_method(self, aSel)); | |
234 | } | |
235 | ||
236 | - (struct objc_method_description *)descriptionForMethod:(SEL)aSel | |
237 | { | |
238 | return ((struct objc_method_description *) | |
239 | (object_is_instance(self) | |
240 | ?class_get_instance_method(self->isa, aSel) | |
241 | :class_get_class_method(self->isa, aSel))); | |
242 | } | |
243 | ||
244 | - perform:(SEL)aSel | |
245 | { | |
246 | IMP msg = objc_msg_lookup(self, aSel); | |
247 | if (!msg) | |
248 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
249 | return (*msg)(self, aSel); | |
250 | } | |
251 | ||
252 | - perform:(SEL)aSel with:anObject | |
253 | { | |
254 | IMP msg = objc_msg_lookup(self, aSel); | |
255 | if (!msg) | |
256 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
257 | return (*msg)(self, aSel, anObject); | |
258 | } | |
259 | ||
260 | - perform:(SEL)aSel with:anObject1 with:anObject2 | |
261 | { | |
262 | IMP msg = objc_msg_lookup(self, aSel); | |
263 | if (!msg) | |
264 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
265 | return (*msg)(self, aSel, anObject1, anObject2); | |
266 | } | |
267 | ||
268 | - (retval_t)forward:(SEL)aSel :(arglist_t)argFrame | |
269 | { | |
b62cc13a | 270 | (void) argFrame; /* UNUSED */ |
88e17b57 BE |
271 | return (retval_t)[self doesNotRecognize: aSel]; |
272 | } | |
273 | ||
274 | - (retval_t)performv:(SEL)aSel :(arglist_t)argFrame | |
275 | { | |
276 | return objc_msg_sendv(self, aSel, argFrame); | |
277 | } | |
278 | ||
279 | + poseAs:(Class)aClassObject | |
280 | { | |
281 | return class_pose_as(self, aClassObject); | |
282 | } | |
283 | ||
284 | - (Class)transmuteClassTo:(Class)aClassObject | |
285 | { | |
286 | if (object_is_instance(self)) | |
287 | if (class_is_class(aClassObject)) | |
288 | if (class_get_instance_size(aClassObject)==class_get_instance_size(isa)) | |
289 | if ([self isKindOf:aClassObject]) | |
290 | { | |
291 | Class old_isa = isa; | |
292 | isa = aClassObject; | |
293 | return old_isa; | |
294 | } | |
295 | return nil; | |
296 | } | |
297 | ||
298 | - subclassResponsibility:(SEL)aSel | |
299 | { | |
300 | return [self error:"subclass should override %s", sel_get_name(aSel)]; | |
301 | } | |
302 | ||
303 | - notImplemented:(SEL)aSel | |
304 | { | |
305 | return [self error:"method %s not implemented", sel_get_name(aSel)]; | |
306 | } | |
307 | ||
308 | - shouldNotImplement:(SEL)aSel | |
309 | { | |
310 | return [self error:"%s should not implement %s", | |
311 | object_get_class_name(self), sel_get_name(aSel)]; | |
312 | } | |
313 | ||
314 | - doesNotRecognize:(SEL)aSel | |
315 | { | |
316 | return [self error:"%s does not recognize %s", | |
317 | object_get_class_name(self), sel_get_name(aSel)]; | |
318 | } | |
319 | ||
88e17b57 BE |
320 | - error:(const char *)aString, ... |
321 | { | |
322 | #define FMT "error: %s (%s)\n%s\n" | |
323 | char fmt[(strlen((char*)FMT)+strlen((char*)object_get_class_name(self)) | |
324 | +((aString!=NULL)?strlen((char*)aString):0)+8)]; | |
325 | va_list ap; | |
326 | ||
327 | sprintf(fmt, FMT, object_get_class_name(self), | |
328 | object_is_instance(self)?"instance":"class", | |
329 | (aString!=NULL)?aString:""); | |
330 | va_start(ap, aString); | |
331 | objc_verror(self, OBJC_ERR_UNKNOWN, fmt, ap); | |
332 | va_end(ap); | |
333 | return nil; | |
334 | #undef FMT | |
335 | } | |
336 | ||
337 | + (int)version | |
338 | { | |
339 | return class_get_version(self); | |
340 | } | |
341 | ||
342 | + setVersion:(int)aVersion | |
343 | { | |
344 | class_set_version(self, aVersion); | |
345 | return self; | |
346 | } | |
e976a775 NP |
347 | @end |
348 | ||
349 | /* The following methods were deprecated in GCC 4.6.0 and will be | |
350 | removed in the next GCC release. | |
351 | */ | |
352 | ||
353 | @implementation Object (Deprecated) | |
88e17b57 BE |
354 | |
355 | + (int)streamVersion: (TypedStream*)aStream | |
356 | { | |
357 | if (aStream->mode == OBJC_READONLY) | |
358 | return objc_get_stream_class_version (aStream, self); | |
359 | else | |
360 | return class_get_version (self); | |
361 | } | |
362 | ||
363 | // These are used to write or read the instance variables | |
364 | // declared in this particular part of the object. Subclasses | |
365 | // should extend these, by calling [super read/write: aStream] | |
366 | // before doing their own archiving. These methods are private, in | |
367 | // the sense that they should only be called from subclasses. | |
368 | ||
369 | - read: (TypedStream*)aStream | |
370 | { | |
b62cc13a | 371 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
372 | // [super read: aStream]; |
373 | return self; | |
374 | } | |
375 | ||
376 | - write: (TypedStream*)aStream | |
377 | { | |
b62cc13a | 378 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
379 | // [super write: aStream]; |
380 | return self; | |
381 | } | |
382 | ||
383 | - awake | |
384 | { | |
385 | // [super awake]; | |
386 | return self; | |
387 | } | |
388 | ||
389 | @end |