1 /* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* IOSet.m created by rsulack on Thu 11-Jun-1998 */ 29 30 #include <libkern/c++/OSDictionary.h> 31 #include <libkern/c++/OSArray.h> 32 #include <libkern/c++/OSSerialize.h> 33 #include <libkern/c++/OSSet.h> 34 35 #define super OSCollection 36 37 OSDefineMetaClassAndStructors(OSSet, OSCollection) 38 OSMetaClassDefineReservedUnused(OSSet, 0); 39 OSMetaClassDefineReservedUnused(OSSet, 1); 40 OSMetaClassDefineReservedUnused(OSSet, 2); 41 OSMetaClassDefineReservedUnused(OSSet, 3); 42 OSMetaClassDefineReservedUnused(OSSet, 4); 43 OSMetaClassDefineReservedUnused(OSSet, 5); 44 OSMetaClassDefineReservedUnused(OSSet, 6); 45 OSMetaClassDefineReservedUnused(OSSet, 7); 46 47 #define EXT_CAST(obj) \ 48 reinterpret_cast<OSObject *>(const_cast<OSMetaClassBase *>(obj)) 49 50 bool OSSet::initWithCapacity(unsigned int inCapacity) 51 { 52 if ( !super::init() ) 53 return false; 54 55 members = OSArray::withCapacity(inCapacity); 56 if (!members) 57 return false; 58 59 return true; 60 } 61 62 bool OSSet::initWithObjects(const OSObject *inObjects[], 63 unsigned int inCount, 64 unsigned int inCapacity) 65 { 66 unsigned int capacity = inCount; 67 68 if ( inCapacity ) { 69 if ( inCount > inCapacity ) 70 return false; 71 72 capacity = inCapacity; 73 } 74 75 if (!inObjects || !initWithCapacity(capacity)) 76 return false; 77 78 for ( unsigned int i = 0; i < inCount; i++ ) { 79 // xx-review: no test here for failure of setObject() 80 if (members->getCount() < inCapacity) 81 setObject(inObjects[i]); 82 else 83 return false; 84 } 85 86 return true; 87 } 88 89 bool OSSet::initWithArray(const OSArray *inArray, 90 unsigned int inCapacity) 91 { 92 if ( !inArray ) 93 return false; 94 95 return initWithObjects((const OSObject **) inArray->array, 96 inArray->count, inCapacity); 97 } 98 99 bool OSSet::initWithSet(const OSSet *inSet, 100 unsigned int inCapacity) 101 { 102 return initWithArray(inSet->members, inCapacity); 103 } 104 105 OSSet *OSSet::withCapacity(unsigned int capacity) 106 { 107 OSSet *me = new OSSet; 108 109 if (me && !me->initWithCapacity(capacity)) { 110 me->release(); 111 return 0; 112 } 113 114 return me; 115 } 116 117 OSSet *OSSet::withObjects(const OSObject *objects[], 118 unsigned int count, 119 unsigned int capacity) 120 { 121 OSSet *me = new OSSet; 122 123 if (me && !me->initWithObjects(objects, count, capacity)) { 124 me->release(); 125 return 0; 126 } 127 128 return me; 129 } 130 131 OSSet *OSSet::withArray(const OSArray *array, 132 unsigned int capacity) 133 { 134 OSSet *me = new OSSet; 135 136 if (me && !me->initWithArray(array, capacity)) { 137 me->release(); 138 return 0; 139 } 140 141 return me; 142 } 143 144 OSSet *OSSet::withSet(const OSSet *set, 145 unsigned int capacity) 146 { 147 OSSet *me = new OSSet; 148 149 if (me && !me->initWithSet(set, capacity)) { 150 me->release(); 151 return 0; 152 } 153 154 return me; 155 } 156 157 void OSSet::free() 158 { 159 (void) members->super::setOptions(0, kImmutable); 160 if (members) 161 members->release(); 162 163 super::free(); 164 } 165 166 unsigned int OSSet::getCount() const 167 { 168 return members->count; 169 } 170 171 unsigned int OSSet::getCapacity() const 172 { 173 return members->capacity; 174 } 175 176 unsigned int OSSet::getCapacityIncrement() const 177 { 178 return members->capacityIncrement; 179 } 180 181 unsigned int OSSet::setCapacityIncrement(unsigned int increment) 182 { 183 return members->setCapacityIncrement(increment); 184 } 185 186 unsigned int OSSet::ensureCapacity(unsigned int newCapacity) 187 { 188 return members->ensureCapacity(newCapacity); 189 } 190 191 void OSSet::flushCollection() 192 { 193 haveUpdated(); 194 members->flushCollection(); 195 } 196 197 bool OSSet::setObject(const OSMetaClassBase *anObject) 198 { 199 if (containsObject(anObject)) { 200 return false; 201 } else { 202 haveUpdated(); 203 return members->setObject(anObject); 204 } 205 } 206 207 bool OSSet::merge(const OSArray * array) 208 { 209 const OSMetaClassBase * anObject = 0; 210 bool result = true; 211 212 for (int i = 0; (anObject = array->getObject(i)); i++) { 213 214 /* setObject() returns false if the object is already in the set, 215 * so we have to check beforehand here with containsObject(). 216 */ 217 if (containsObject(anObject)) { 218 continue; 219 } 220 if (!setObject(anObject)) { 221 result = false; 222 } 223 } 224 225 return result; 226 } 227 228 bool OSSet::merge(const OSSet * set) 229 { 230 return merge(set->members); 231 } 232 233 void OSSet::removeObject(const OSMetaClassBase *anObject) 234 { 235 const OSMetaClassBase *probeObject; 236 237 for (int i = 0; (probeObject = members->getObject(i)); i++) 238 if (probeObject == anObject) { 239 haveUpdated(); 240 members->removeObject(i); 241 return; 242 } 243 } 244 245 246 bool OSSet::containsObject(const OSMetaClassBase *anObject) const 247 { 248 return anObject && member(anObject); 249 } 250 251 bool OSSet::member(const OSMetaClassBase *anObject) const 252 { 253 OSMetaClassBase *probeObject; 254 255 for (int i = 0; (probeObject = members->getObject(i)); i++) 256 if (probeObject == anObject) 257 return true; 258 259 return false; 260 } 261 262 OSObject *OSSet::getAnyObject() const 263 { 264 return members->getObject(0); 265 } 266 267 bool OSSet::isEqualTo(const OSSet *aSet) const 268 { 269 unsigned int count; 270 unsigned int i; 271 const OSMetaClassBase *obj1; 272 const OSMetaClassBase *obj2; 273 274 if ( this == aSet ) 275 return true; 276 277 count = members->count; 278 if ( count != aSet->getCount() ) 279 return false; 280 281 for ( i = 0; i < count; i++ ) { 282 obj1 = aSet->members->getObject(i); 283 obj2 = members->getObject(i); 284 if ( !obj1 || !obj2 ) 285 return false; 286 287 if ( !obj1->isEqualTo(obj2) ) 288 return false; 289 } 290 291 return true; 292 } 293 294 bool OSSet::isEqualTo(const OSMetaClassBase *anObject) const 295 { 296 OSSet *otherSet; 297 298 otherSet = OSDynamicCast(OSSet, anObject); 299 if ( otherSet ) 300 return isEqualTo(otherSet); 301 else 302 return false; 303 } 304 305 unsigned int OSSet::iteratorSize() const 306 { 307 return sizeof(unsigned int); 308 } 309 310 bool OSSet::initIterator(void *inIterator) const 311 { 312 unsigned int *iteratorP = (unsigned int *) inIterator; 313 314 *iteratorP = 0; 315 return true; 316 } 317 318 bool OSSet::getNextObjectForIterator(void *inIterator, OSObject **ret) const 319 { 320 unsigned int *iteratorP = (unsigned int *) inIterator; 321 unsigned int index = (*iteratorP)++; 322 323 if (index < members->count) 324 *ret = members->getObject(index); 325 else 326 *ret = 0; 327 328 return (*ret != 0); 329 } 330 331 bool OSSet::serialize(OSSerialize *s) const 332 { 333 const OSMetaClassBase *o; 334 335 if (s->previouslySerialized(this)) return true; 336 337 if (!s->addXMLStartTag(this, "set")) return false; 338 339 for (int i = 0; (o = members->getObject(i)); i++) { 340 if (!o->serialize(s)) return false; 341 } 342 343 return s->addXMLEndTag("set"); 344 } 345 346 unsigned OSSet::setOptions(unsigned options, unsigned mask, void *) 347 { 348 unsigned old = super::setOptions(options, mask); 349 if ((old ^ options) & mask) 350 members->setOptions(options, mask); 351 352 return old; 353 } 354 355 OSCollection * OSSet::copyCollection(OSDictionary *cycleDict) 356 { 357 bool allocDict = !cycleDict; 358 OSCollection *ret = 0; 359 OSSet *newSet = 0; 360 361 if (allocDict) { 362 cycleDict = OSDictionary::withCapacity(16); 363 if (!cycleDict) 364 return 0; 365 } 366 367 do { 368 // Check for a cycle 369 ret = super::copyCollection(cycleDict); 370 if (ret) 371 continue; // Found it 372 373 newSet = OSSet::withCapacity(members->capacity); 374 if (!newSet) 375 continue; // Couldn't create new set abort 376 377 // Insert object into cycle Dictionary 378 cycleDict->setObject((const OSSymbol *) this, newSet); 379 380 OSArray *newMembers = newSet->members; 381 newMembers->capacityIncrement = members->capacityIncrement; 382 383 // Now copy over the contents into the new duplicate 384 for (unsigned int i = 0; i < members->count; i++) { 385 OSObject *obj = EXT_CAST(members->array[i]); 386 OSCollection *coll = OSDynamicCast(OSCollection, obj); 387 if (coll) { 388 OSCollection *newColl = coll->copyCollection(cycleDict); 389 if (newColl) { 390 obj = newColl; // Rely on cycleDict ref for a bit 391 newColl->release(); 392 } 393 else 394 goto abortCopy; 395 }; 396 newMembers->setObject(obj); 397 }; 398 399 ret = newSet; 400 newSet = 0; 401 402 } while(false); 403 404 abortCopy: 405 if (newSet) 406 newSet->release(); 407 408 if (allocDict) 409 cycleDict->release(); 410 411 return ret; 412 } 413