AssetManager.cpp revision 54b6cfa9a9e5b861a9930af873580d6dc20f773c
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17// 18// Provide access to read-only assets. 19// 20 21#define LOG_TAG "asset" 22//#define LOG_NDEBUG 0 23 24#include <utils/AssetManager.h> 25#include <utils/AssetDir.h> 26#include <utils/Asset.h> 27#include <utils/Atomic.h> 28#include <utils/String8.h> 29#include <utils/ResourceTypes.h> 30#include <utils/String8.h> 31#include <utils/ZipFileRO.h> 32#include <utils/Log.h> 33#include <utils/Timers.h> 34#include <utils/threads.h> 35 36#include <dirent.h> 37#include <errno.h> 38#include <assert.h> 39 40using namespace android; 41 42/* 43 * Names for default app, locale, and vendor. We might want to change 44 * these to be an actual locale, e.g. always use en-US as the default. 45 */ 46static const char* kDefaultLocale = "default"; 47static const char* kDefaultVendor = "default"; 48static const char* kAssetsRoot = "assets"; 49static const char* kAppZipName = NULL; //"classes.jar"; 50static const char* kSystemAssets = "framework/framework-res.apk"; 51 52static const char* kExcludeExtension = ".EXCLUDE"; 53 54static Asset* const kExcludedAsset = (Asset*) 0xd000000d; 55 56static volatile int32_t gCount = 0; 57 58 59/* 60 * =========================================================================== 61 * AssetManager 62 * =========================================================================== 63 */ 64 65int32_t AssetManager::getGlobalCount() 66{ 67 return gCount; 68} 69 70AssetManager::AssetManager(CacheMode cacheMode) 71 : mLocale(NULL), mVendor(NULL), 72 mResources(NULL), mConfig(new ResTable_config), 73 mCacheMode(cacheMode), mCacheValid(false) 74{ 75 int count = android_atomic_inc(&gCount)+1; 76 //LOGI("Creating AssetManager %p #%d\n", this, count); 77 memset(mConfig, 0, sizeof(ResTable_config)); 78} 79 80AssetManager::~AssetManager(void) 81{ 82 int count = android_atomic_dec(&gCount); 83 //LOGI("Destroying AssetManager in %p #%d\n", this, count); 84 85 delete mConfig; 86 delete mResources; 87 88 // don't have a String class yet, so make sure we clean up 89 delete[] mLocale; 90 delete[] mVendor; 91} 92 93bool AssetManager::addAssetPath(const String8& path, void** cookie) 94{ 95 AutoMutex _l(mLock); 96 97 asset_path ap; 98 99 String8 realPath(path); 100 if (kAppZipName) { 101 realPath.appendPath(kAppZipName); 102 } 103 ap.type = ::getFileType(realPath.string()); 104 if (ap.type == kFileTypeRegular) { 105 ap.path = realPath; 106 } else { 107 ap.path = path; 108 ap.type = ::getFileType(path.string()); 109 if (ap.type != kFileTypeDirectory && ap.type != kFileTypeRegular) { 110 LOGW("Asset path %s is neither a directory nor file (type=%d).", 111 path.string(), (int)ap.type); 112 return false; 113 } 114 } 115 116 // Skip if we have it already. 117 for (size_t i=0; i<mAssetPaths.size(); i++) { 118 if (mAssetPaths[i].path == ap.path) { 119 if (cookie) { 120 *cookie = (void*)(i+1); 121 } 122 return true; 123 } 124 } 125 126 LOGV("In %p Asset %s path: %s", this, 127 ap.type == kFileTypeDirectory ? "dir" : "zip", ap.path.string()); 128 129 mAssetPaths.add(ap); 130 131 // new paths are always added at the end 132 if (cookie) { 133 *cookie = (void*)mAssetPaths.size(); 134 } 135 136 return true; 137} 138 139bool AssetManager::addDefaultAssets() 140{ 141 const char* root = getenv("ANDROID_ROOT"); 142 LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_ROOT not set"); 143 144 String8 path(root); 145 path.appendPath(kSystemAssets); 146 147 return addAssetPath(path, NULL); 148} 149 150void* AssetManager::nextAssetPath(void* cookie) const 151{ 152 AutoMutex _l(mLock); 153 size_t next = ((size_t)cookie)+1; 154 return next > mAssetPaths.size() ? NULL : (void*)next; 155} 156 157String8 AssetManager::getAssetPath(void* cookie) const 158{ 159 AutoMutex _l(mLock); 160 const size_t which = ((size_t)cookie)-1; 161 if (which < mAssetPaths.size()) { 162 return mAssetPaths[which].path; 163 } 164 return String8(); 165} 166 167/* 168 * Set the current locale. Use NULL to indicate no locale. 169 * 170 * Close and reopen Zip archives as appropriate, and reset cached 171 * information in the locale-specific sections of the tree. 172 */ 173void AssetManager::setLocale(const char* locale) 174{ 175 AutoMutex _l(mLock); 176 setLocaleLocked(locale); 177} 178 179void AssetManager::setLocaleLocked(const char* locale) 180{ 181 if (mLocale != NULL) { 182 /* previously set, purge cached data */ 183 purgeFileNameCacheLocked(); 184 //mZipSet.purgeLocale(); 185 delete[] mLocale; 186 } 187 mLocale = strdupNew(locale); 188 189 updateResourceParamsLocked(); 190} 191 192/* 193 * Set the current vendor. Use NULL to indicate no vendor. 194 * 195 * Close and reopen Zip archives as appropriate, and reset cached 196 * information in the vendor-specific sections of the tree. 197 */ 198void AssetManager::setVendor(const char* vendor) 199{ 200 AutoMutex _l(mLock); 201 202 if (mVendor != NULL) { 203 /* previously set, purge cached data */ 204 purgeFileNameCacheLocked(); 205 //mZipSet.purgeVendor(); 206 delete[] mVendor; 207 } 208 mVendor = strdupNew(vendor); 209} 210 211void AssetManager::setConfiguration(const ResTable_config& config, const char* locale) 212{ 213 AutoMutex _l(mLock); 214 *mConfig = config; 215 if (locale) { 216 setLocaleLocked(locale); 217 } else if (config.language[0] != 0) { 218 char spec[9]; 219 spec[0] = config.language[0]; 220 spec[1] = config.language[1]; 221 if (config.country[0] != 0) { 222 spec[2] = '_'; 223 spec[3] = config.country[0]; 224 spec[4] = config.country[1]; 225 spec[5] = 0; 226 } else { 227 spec[3] = 0; 228 } 229 setLocaleLocked(spec); 230 } else { 231 updateResourceParamsLocked(); 232 } 233} 234 235/* 236 * Open an asset. 237 * 238 * The data could be; 239 * - In a file on disk (assetBase + fileName). 240 * - In a compressed file on disk (assetBase + fileName.gz). 241 * - In a Zip archive, uncompressed or compressed. 242 * 243 * It can be in a number of different directories and Zip archives. 244 * The search order is: 245 * - [appname] 246 * - locale + vendor 247 * - "default" + vendor 248 * - locale + "default" 249 * - "default + "default" 250 * - "common" 251 * - (same as above) 252 * 253 * To find a particular file, we have to try up to eight paths with 254 * all three forms of data. 255 * 256 * We should probably reject requests for "illegal" filenames, e.g. those 257 * with illegal characters or "../" backward relative paths. 258 */ 259Asset* AssetManager::open(const char* fileName, AccessMode mode) 260{ 261 AutoMutex _l(mLock); 262 263 LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); 264 265 266 if (mCacheMode != CACHE_OFF && !mCacheValid) 267 loadFileNameCacheLocked(); 268 269 String8 assetName(kAssetsRoot); 270 assetName.appendPath(fileName); 271 272 /* 273 * For each top-level asset path, search for the asset. 274 */ 275 276 size_t i = mAssetPaths.size(); 277 while (i > 0) { 278 i--; 279 LOGV("Looking for asset '%s' in '%s'\n", 280 assetName.string(), mAssetPaths.itemAt(i).path.string()); 281 Asset* pAsset = openNonAssetInPathLocked(assetName.string(), mode, mAssetPaths.itemAt(i)); 282 if (pAsset != NULL) { 283 return pAsset != kExcludedAsset ? pAsset : NULL; 284 } 285 } 286 287 return NULL; 288} 289 290/* 291 * Open a non-asset file as if it were an asset. 292 * 293 * The "fileName" is the partial path starting from the application 294 * name. 295 */ 296Asset* AssetManager::openNonAsset(const char* fileName, AccessMode mode) 297{ 298 AutoMutex _l(mLock); 299 300 LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); 301 302 303 if (mCacheMode != CACHE_OFF && !mCacheValid) 304 loadFileNameCacheLocked(); 305 306 /* 307 * For each top-level asset path, search for the asset. 308 */ 309 310 size_t i = mAssetPaths.size(); 311 while (i > 0) { 312 i--; 313 LOGV("Looking for non-asset '%s' in '%s'\n", fileName, mAssetPaths.itemAt(i).path.string()); 314 Asset* pAsset = openNonAssetInPathLocked( 315 fileName, mode, mAssetPaths.itemAt(i)); 316 if (pAsset != NULL) { 317 return pAsset != kExcludedAsset ? pAsset : NULL; 318 } 319 } 320 321 return NULL; 322} 323 324Asset* AssetManager::openNonAsset(void* cookie, const char* fileName, AccessMode mode) 325{ 326 const size_t which = ((size_t)cookie)-1; 327 328 AutoMutex _l(mLock); 329 330 LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); 331 332 333 if (mCacheMode != CACHE_OFF && !mCacheValid) 334 loadFileNameCacheLocked(); 335 336 if (which < mAssetPaths.size()) { 337 LOGV("Looking for non-asset '%s' in '%s'\n", fileName, 338 mAssetPaths.itemAt(which).path.string()); 339 Asset* pAsset = openNonAssetInPathLocked( 340 fileName, mode, mAssetPaths.itemAt(which)); 341 if (pAsset != NULL) { 342 return pAsset != kExcludedAsset ? pAsset : NULL; 343 } 344 } 345 346 return NULL; 347} 348 349/* 350 * Get the type of a file in the asset namespace. 351 * 352 * This currently only works for regular files. All others (including 353 * directories) will return kFileTypeNonexistent. 354 */ 355FileType AssetManager::getFileType(const char* fileName) 356{ 357 Asset* pAsset = NULL; 358 359 /* 360 * Open the asset. This is less efficient than simply finding the 361 * file, but it's not too bad (we don't uncompress or mmap data until 362 * the first read() call). 363 */ 364 pAsset = open(fileName, Asset::ACCESS_STREAMING); 365 delete pAsset; 366 367 if (pAsset == NULL) 368 return kFileTypeNonexistent; 369 else 370 return kFileTypeRegular; 371} 372 373const ResTable* AssetManager::getResTable(bool required) const 374{ 375 ResTable* rt = mResources; 376 if (rt) { 377 return rt; 378 } 379 380 // Iterate through all asset packages, collecting resources from each. 381 382 AutoMutex _l(mLock); 383 384 if (mResources != NULL) { 385 return mResources; 386 } 387 388 if (required) { 389 LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); 390 } 391 392 if (mCacheMode != CACHE_OFF && !mCacheValid) 393 const_cast<AssetManager*>(this)->loadFileNameCacheLocked(); 394 395 const size_t N = mAssetPaths.size(); 396 for (size_t i=0; i<N; i++) { 397 Asset* ass = NULL; 398 bool shared = true; 399 const asset_path& ap = mAssetPaths.itemAt(i); 400 LOGV("Looking for resource asset in '%s'\n", ap.path.string()); 401 if (ap.type != kFileTypeDirectory) { 402 ass = const_cast<AssetManager*>(this)-> 403 mZipSet.getZipResourceTable(ap.path); 404 if (ass == NULL) { 405 LOGV("loading resource table %s\n", ap.path.string()); 406 ass = const_cast<AssetManager*>(this)-> 407 openNonAssetInPathLocked("resources.arsc", 408 Asset::ACCESS_BUFFER, 409 ap); 410 if (ass != NULL && ass != kExcludedAsset) { 411 ass = const_cast<AssetManager*>(this)-> 412 mZipSet.setZipResourceTable(ap.path, ass); 413 } 414 } 415 } else { 416 LOGV("loading resource table %s\n", ap.path.string()); 417 Asset* ass = const_cast<AssetManager*>(this)-> 418 openNonAssetInPathLocked("resources.arsc", 419 Asset::ACCESS_BUFFER, 420 ap); 421 shared = false; 422 } 423 if (ass != NULL && ass != kExcludedAsset) { 424 if (rt == NULL) { 425 mResources = rt = new ResTable(); 426 updateResourceParamsLocked(); 427 } 428 LOGV("Installing resource asset %p in to table %p\n", ass, mResources); 429 rt->add(ass, (void*)(i+1), !shared); 430 431 if (!shared) { 432 delete ass; 433 } 434 } 435 } 436 437 if (required && !rt) LOGW("Unable to find resources file resources.arsc"); 438 if (!rt) { 439 mResources = rt = new ResTable(); 440 } 441 return rt; 442} 443 444void AssetManager::updateResourceParamsLocked() const 445{ 446 ResTable* res = mResources; 447 if (!res) { 448 return; 449 } 450 451 size_t llen = mLocale ? strlen(mLocale) : 0; 452 mConfig->language[0] = 0; 453 mConfig->language[1] = 0; 454 mConfig->country[0] = 0; 455 mConfig->country[1] = 0; 456 if (llen >= 2) { 457 mConfig->language[0] = mLocale[0]; 458 mConfig->language[1] = mLocale[1]; 459 } 460 if (llen >= 5) { 461 mConfig->country[0] = mLocale[3]; 462 mConfig->country[1] = mLocale[4]; 463 } 464 mConfig->size = sizeof(*mConfig); 465 466 res->setParameters(mConfig); 467} 468 469const ResTable& AssetManager::getResources(bool required) const 470{ 471 const ResTable* rt = getResTable(required); 472 return *rt; 473} 474 475bool AssetManager::isUpToDate() 476{ 477 AutoMutex _l(mLock); 478 return mZipSet.isUpToDate(); 479} 480 481void AssetManager::getLocales(Vector<String8>* locales) const 482{ 483 ResTable* res = mResources; 484 if (res != NULL) { 485 res->getLocales(locales); 486 } 487} 488 489/* 490 * Open a non-asset file as if it were an asset, searching for it in the 491 * specified app. 492 * 493 * Pass in a NULL values for "appName" if the common app directory should 494 * be used. 495 */ 496Asset* AssetManager::openNonAssetInPathLocked(const char* fileName, AccessMode mode, 497 const asset_path& ap) 498{ 499 Asset* pAsset = NULL; 500 501 /* look at the filesystem on disk */ 502 if (ap.type == kFileTypeDirectory) { 503 String8 path(ap.path); 504 path.appendPath(fileName); 505 506 pAsset = openAssetFromFileLocked(path, mode); 507 508 if (pAsset == NULL) { 509 /* try again, this time with ".gz" */ 510 path.append(".gz"); 511 pAsset = openAssetFromFileLocked(path, mode); 512 } 513 514 if (pAsset != NULL) { 515 //printf("FOUND NA '%s' on disk\n", fileName); 516 pAsset->setAssetSource(path); 517 } 518 519 /* look inside the zip file */ 520 } else { 521 String8 path(fileName); 522 523 /* check the appropriate Zip file */ 524 ZipFileRO* pZip; 525 ZipEntryRO entry; 526 527 pZip = getZipFileLocked(ap); 528 if (pZip != NULL) { 529 //printf("GOT zip, checking NA '%s'\n", (const char*) path); 530 entry = pZip->findEntryByName(path.string()); 531 if (entry != NULL) { 532 //printf("FOUND NA in Zip file for %s\n", appName ? appName : kAppCommon); 533 pAsset = openAssetFromZipLocked(pZip, entry, mode, path); 534 } 535 } 536 537 if (pAsset != NULL) { 538 /* create a "source" name, for debug/display */ 539 pAsset->setAssetSource( 540 createZipSourceNameLocked(ZipSet::getPathName(ap.path.string()), String8(""), 541 String8(fileName))); 542 } 543 } 544 545 return pAsset; 546} 547 548/* 549 * Open an asset, searching for it in the directory hierarchy for the 550 * specified app. 551 * 552 * Pass in a NULL values for "appName" if the common app directory should 553 * be used. 554 */ 555Asset* AssetManager::openInPathLocked(const char* fileName, AccessMode mode, 556 const asset_path& ap) 557{ 558 Asset* pAsset = NULL; 559 560 /* 561 * Try various combinations of locale and vendor. 562 */ 563 if (mLocale != NULL && mVendor != NULL) 564 pAsset = openInLocaleVendorLocked(fileName, mode, ap, mLocale, mVendor); 565 if (pAsset == NULL && mVendor != NULL) 566 pAsset = openInLocaleVendorLocked(fileName, mode, ap, NULL, mVendor); 567 if (pAsset == NULL && mLocale != NULL) 568 pAsset = openInLocaleVendorLocked(fileName, mode, ap, mLocale, NULL); 569 if (pAsset == NULL) 570 pAsset = openInLocaleVendorLocked(fileName, mode, ap, NULL, NULL); 571 572 return pAsset; 573} 574 575/* 576 * Open an asset, searching for it in the directory hierarchy for the 577 * specified locale and vendor. 578 * 579 * We also search in "app.jar". 580 * 581 * Pass in NULL values for "appName", "locale", and "vendor" if the 582 * defaults should be used. 583 */ 584Asset* AssetManager::openInLocaleVendorLocked(const char* fileName, AccessMode mode, 585 const asset_path& ap, const char* locale, const char* vendor) 586{ 587 Asset* pAsset = NULL; 588 589 if (ap.type == kFileTypeDirectory) { 590 if (mCacheMode == CACHE_OFF) { 591 /* look at the filesystem on disk */ 592 String8 path(createPathNameLocked(ap, locale, vendor)); 593 path.appendPath(fileName); 594 595 String8 excludeName(path); 596 excludeName.append(kExcludeExtension); 597 if (::getFileType(excludeName.string()) != kFileTypeNonexistent) { 598 /* say no more */ 599 //printf("+++ excluding '%s'\n", (const char*) excludeName); 600 return kExcludedAsset; 601 } 602 603 pAsset = openAssetFromFileLocked(path, mode); 604 605 if (pAsset == NULL) { 606 /* try again, this time with ".gz" */ 607 path.append(".gz"); 608 pAsset = openAssetFromFileLocked(path, mode); 609 } 610 611 if (pAsset != NULL) 612 pAsset->setAssetSource(path); 613 } else { 614 /* find in cache */ 615 String8 path(createPathNameLocked(ap, locale, vendor)); 616 path.appendPath(fileName); 617 618 AssetDir::FileInfo tmpInfo; 619 bool found = false; 620 621 String8 excludeName(path); 622 excludeName.append(kExcludeExtension); 623 624 if (mCache.indexOf(excludeName) != NAME_NOT_FOUND) { 625 /* go no farther */ 626 //printf("+++ Excluding '%s'\n", (const char*) excludeName); 627 return kExcludedAsset; 628 } 629 630 /* 631 * File compression extensions (".gz") don't get stored in the 632 * name cache, so we have to try both here. 633 */ 634 if (mCache.indexOf(path) != NAME_NOT_FOUND) { 635 found = true; 636 pAsset = openAssetFromFileLocked(path, mode); 637 if (pAsset == NULL) { 638 /* try again, this time with ".gz" */ 639 path.append(".gz"); 640 pAsset = openAssetFromFileLocked(path, mode); 641 } 642 } 643 644 if (pAsset != NULL) 645 pAsset->setAssetSource(path); 646 647 /* 648 * Don't continue the search into the Zip files. Our cached info 649 * said it was a file on disk; to be consistent with openDir() 650 * we want to return the loose asset. If the cached file gets 651 * removed, we fail. 652 * 653 * The alternative is to update our cache when files get deleted, 654 * or make some sort of "best effort" promise, but for now I'm 655 * taking the hard line. 656 */ 657 if (found) { 658 if (pAsset == NULL) 659 LOGD("Expected file not found: '%s'\n", path.string()); 660 return pAsset; 661 } 662 } 663 } 664 665 /* 666 * Either it wasn't found on disk or on the cached view of the disk. 667 * Dig through the currently-opened set of Zip files. If caching 668 * is disabled, the Zip file may get reopened. 669 */ 670 if (pAsset == NULL && ap.type == kFileTypeRegular) { 671 String8 path; 672 673 path.appendPath((locale != NULL) ? locale : kDefaultLocale); 674 path.appendPath((vendor != NULL) ? vendor : kDefaultVendor); 675 path.appendPath(fileName); 676 677 /* check the appropriate Zip file */ 678 ZipFileRO* pZip; 679 ZipEntryRO entry; 680 681 pZip = getZipFileLocked(ap); 682 if (pZip != NULL) { 683 //printf("GOT zip, checking '%s'\n", (const char*) path); 684 entry = pZip->findEntryByName(path.string()); 685 if (entry != NULL) { 686 //printf("FOUND in Zip file for %s/%s-%s\n", 687 // appName, locale, vendor); 688 pAsset = openAssetFromZipLocked(pZip, entry, mode, path); 689 } 690 } 691 692 if (pAsset != NULL) { 693 /* create a "source" name, for debug/display */ 694 pAsset->setAssetSource(createZipSourceNameLocked(ZipSet::getPathName(ap.path.string()), 695 String8(""), String8(fileName))); 696 } 697 } 698 699 return pAsset; 700} 701 702/* 703 * Create a "source name" for a file from a Zip archive. 704 */ 705String8 AssetManager::createZipSourceNameLocked(const String8& zipFileName, 706 const String8& dirName, const String8& fileName) 707{ 708 String8 sourceName("zip:"); 709 sourceName.append(zipFileName); 710 sourceName.append(":"); 711 if (dirName.length() > 0) { 712 sourceName.appendPath(dirName); 713 } 714 sourceName.appendPath(fileName); 715 return sourceName; 716} 717 718/* 719 * Create a path to a loose asset (asset-base/app/locale/vendor). 720 */ 721String8 AssetManager::createPathNameLocked(const asset_path& ap, const char* locale, 722 const char* vendor) 723{ 724 String8 path(ap.path); 725 path.appendPath((locale != NULL) ? locale : kDefaultLocale); 726 path.appendPath((vendor != NULL) ? vendor : kDefaultVendor); 727 return path; 728} 729 730/* 731 * Create a path to a loose asset (asset-base/app/rootDir). 732 */ 733String8 AssetManager::createPathNameLocked(const asset_path& ap, const char* rootDir) 734{ 735 String8 path(ap.path); 736 if (rootDir != NULL) path.appendPath(rootDir); 737 return path; 738} 739 740/* 741 * Return a pointer to one of our open Zip archives. Returns NULL if no 742 * matching Zip file exists. 743 * 744 * Right now we have 2 possible Zip files (1 each in app/"common"). 745 * 746 * If caching is set to CACHE_OFF, to get the expected behavior we 747 * need to reopen the Zip file on every request. That would be silly 748 * and expensive, so instead we just check the file modification date. 749 * 750 * Pass in NULL values for "appName", "locale", and "vendor" if the 751 * generics should be used. 752 */ 753ZipFileRO* AssetManager::getZipFileLocked(const asset_path& ap) 754{ 755 LOGV("getZipFileLocked() in %p\n", this); 756 757 return mZipSet.getZip(ap.path); 758} 759 760/* 761 * Try to open an asset from a file on disk. 762 * 763 * If the file is compressed with gzip, we seek to the start of the 764 * deflated data and pass that in (just like we would for a Zip archive). 765 * 766 * For uncompressed data, we may already have an mmap()ed version sitting 767 * around. If so, we want to hand that to the Asset instead. 768 * 769 * This returns NULL if the file doesn't exist, couldn't be opened, or 770 * claims to be a ".gz" but isn't. 771 */ 772Asset* AssetManager::openAssetFromFileLocked(const String8& pathName, 773 AccessMode mode) 774{ 775 Asset* pAsset = NULL; 776 777 if (strcasecmp(pathName.getPathExtension().string(), ".gz") == 0) { 778 //printf("TRYING '%s'\n", (const char*) pathName); 779 pAsset = Asset::createFromCompressedFile(pathName.string(), mode); 780 } else { 781 //printf("TRYING '%s'\n", (const char*) pathName); 782 pAsset = Asset::createFromFile(pathName.string(), mode); 783 } 784 785 return pAsset; 786} 787 788/* 789 * Given an entry in a Zip archive, create a new Asset object. 790 * 791 * If the entry is uncompressed, we may want to create or share a 792 * slice of shared memory. 793 */ 794Asset* AssetManager::openAssetFromZipLocked(const ZipFileRO* pZipFile, 795 const ZipEntryRO entry, AccessMode mode, const String8& entryName) 796{ 797 Asset* pAsset = NULL; 798 799 // TODO: look for previously-created shared memory slice? 800 int method; 801 long uncompressedLen; 802 803 //printf("USING Zip '%s'\n", pEntry->getFileName()); 804 805 //pZipFile->getEntryInfo(entry, &method, &uncompressedLen, &compressedLen, 806 // &offset); 807 if (!pZipFile->getEntryInfo(entry, &method, &uncompressedLen, NULL, NULL, 808 NULL, NULL)) 809 { 810 LOGW("getEntryInfo failed\n"); 811 return NULL; 812 } 813 814 FileMap* dataMap = pZipFile->createEntryFileMap(entry); 815 if (dataMap == NULL) { 816 LOGW("create map from entry failed\n"); 817 return NULL; 818 } 819 820 if (method == ZipFileRO::kCompressStored) { 821 pAsset = Asset::createFromUncompressedMap(dataMap, mode); 822 LOGV("Opened uncompressed entry %s in zip %s mode %d: %p", entryName.string(), 823 dataMap->getFileName(), mode, pAsset); 824 } else { 825 pAsset = Asset::createFromCompressedMap(dataMap, method, 826 uncompressedLen, mode); 827 LOGV("Opened compressed entry %s in zip %s mode %d: %p", entryName.string(), 828 dataMap->getFileName(), mode, pAsset); 829 } 830 if (pAsset == NULL) { 831 /* unexpected */ 832 LOGW("create from segment failed\n"); 833 } 834 835 return pAsset; 836} 837 838 839 840/* 841 * Open a directory in the asset namespace. 842 * 843 * An "asset directory" is simply the combination of all files in all 844 * locations, with ".gz" stripped for loose files. With app, locale, and 845 * vendor defined, we have 8 directories and 2 Zip archives to scan. 846 * 847 * Pass in "" for the root dir. 848 */ 849AssetDir* AssetManager::openDir(const char* dirName) 850{ 851 AutoMutex _l(mLock); 852 853 AssetDir* pDir = NULL; 854 SortedVector<AssetDir::FileInfo>* pMergedInfo = NULL; 855 856 LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); 857 assert(dirName != NULL); 858 859 //printf("+++ openDir(%s) in '%s'\n", dirName, (const char*) mAssetBase); 860 861 if (mCacheMode != CACHE_OFF && !mCacheValid) 862 loadFileNameCacheLocked(); 863 864 pDir = new AssetDir; 865 866 /* 867 * Scan the various directories, merging what we find into a single 868 * vector. We want to scan them in reverse priority order so that 869 * the ".EXCLUDE" processing works correctly. Also, if we decide we 870 * want to remember where the file is coming from, we'll get the right 871 * version. 872 * 873 * We start with Zip archives, then do loose files. 874 */ 875 pMergedInfo = new SortedVector<AssetDir::FileInfo>; 876 877 size_t i = mAssetPaths.size(); 878 while (i > 0) { 879 i--; 880 const asset_path& ap = mAssetPaths.itemAt(i); 881 if (ap.type == kFileTypeRegular) { 882 LOGV("Adding directory %s from zip %s", dirName, ap.path.string()); 883 scanAndMergeZipLocked(pMergedInfo, ap, kAssetsRoot, dirName); 884 } else { 885 LOGV("Adding directory %s from dir %s", dirName, ap.path.string()); 886 scanAndMergeDirLocked(pMergedInfo, ap, kAssetsRoot, dirName); 887 } 888 } 889 890#if 0 891 printf("FILE LIST:\n"); 892 for (i = 0; i < (size_t) pMergedInfo->size(); i++) { 893 printf(" %d: (%d) '%s'\n", i, 894 pMergedInfo->itemAt(i).getFileType(), 895 (const char*) pMergedInfo->itemAt(i).getFileName()); 896 } 897#endif 898 899 pDir->setFileList(pMergedInfo); 900 return pDir; 901} 902 903/* 904 * Scan the contents of the specified directory and merge them into the 905 * "pMergedInfo" vector, removing previous entries if we find "exclude" 906 * directives. 907 * 908 * Returns "false" if we found nothing to contribute. 909 */ 910bool AssetManager::scanAndMergeDirLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, 911 const asset_path& ap, const char* rootDir, const char* dirName) 912{ 913 SortedVector<AssetDir::FileInfo>* pContents; 914 String8 path; 915 916 assert(pMergedInfo != NULL); 917 918 //printf("scanAndMergeDir: %s %s %s %s\n", appName, locale, vendor,dirName); 919 920 if (mCacheValid) { 921 int i, start, count; 922 923 pContents = new SortedVector<AssetDir::FileInfo>; 924 925 /* 926 * Get the basic partial path and find it in the cache. That's 927 * the start point for the search. 928 */ 929 path = createPathNameLocked(ap, rootDir); 930 if (dirName[0] != '\0') 931 path.appendPath(dirName); 932 933 start = mCache.indexOf(path); 934 if (start == NAME_NOT_FOUND) { 935 //printf("+++ not found in cache: dir '%s'\n", (const char*) path); 936 delete pContents; 937 return false; 938 } 939 940 /* 941 * The match string looks like "common/default/default/foo/bar/". 942 * The '/' on the end ensures that we don't match on the directory 943 * itself or on ".../foo/barfy/". 944 */ 945 path.append("/"); 946 947 count = mCache.size(); 948 949 /* 950 * Pick out the stuff in the current dir by examining the pathname. 951 * It needs to match the partial pathname prefix, and not have a '/' 952 * (fssep) anywhere after the prefix. 953 */ 954 for (i = start+1; i < count; i++) { 955 if (mCache[i].getFileName().length() > path.length() && 956 strncmp(mCache[i].getFileName().string(), path.string(), path.length()) == 0) 957 { 958 const char* name = mCache[i].getFileName().string(); 959 // XXX THIS IS BROKEN! Looks like we need to store the full 960 // path prefix separately from the file path. 961 if (strchr(name + path.length(), '/') == NULL) { 962 /* grab it, reducing path to just the filename component */ 963 AssetDir::FileInfo tmp = mCache[i]; 964 tmp.setFileName(tmp.getFileName().getPathLeaf()); 965 pContents->add(tmp); 966 } 967 } else { 968 /* no longer in the dir or its subdirs */ 969 break; 970 } 971 972 } 973 } else { 974 path = createPathNameLocked(ap, rootDir); 975 if (dirName[0] != '\0') 976 path.appendPath(dirName); 977 pContents = scanDirLocked(path); 978 if (pContents == NULL) 979 return false; 980 } 981 982 // if we wanted to do an incremental cache fill, we would do it here 983 984 /* 985 * Process "exclude" directives. If we find a filename that ends with 986 * ".EXCLUDE", we look for a matching entry in the "merged" set, and 987 * remove it if we find it. We also delete the "exclude" entry. 988 */ 989 int i, count, exclExtLen; 990 991 count = pContents->size(); 992 exclExtLen = strlen(kExcludeExtension); 993 for (i = 0; i < count; i++) { 994 const char* name; 995 int nameLen; 996 997 name = pContents->itemAt(i).getFileName().string(); 998 nameLen = strlen(name); 999 if (nameLen > exclExtLen && 1000 strcmp(name + (nameLen - exclExtLen), kExcludeExtension) == 0) 1001 { 1002 String8 match(name, nameLen - exclExtLen); 1003 int matchIdx; 1004 1005 matchIdx = AssetDir::FileInfo::findEntry(pMergedInfo, match); 1006 if (matchIdx > 0) { 1007 LOGV("Excluding '%s' [%s]\n", 1008 pMergedInfo->itemAt(matchIdx).getFileName().string(), 1009 pMergedInfo->itemAt(matchIdx).getSourceName().string()); 1010 pMergedInfo->removeAt(matchIdx); 1011 } else { 1012 //printf("+++ no match on '%s'\n", (const char*) match); 1013 } 1014 1015 LOGD("HEY: size=%d removing %d\n", (int)pContents->size(), i); 1016 pContents->removeAt(i); 1017 i--; // adjust "for" loop 1018 count--; // and loop limit 1019 } 1020 } 1021 1022 mergeInfoLocked(pMergedInfo, pContents); 1023 1024 delete pContents; 1025 1026 return true; 1027} 1028 1029/* 1030 * Scan the contents of the specified directory, and stuff what we find 1031 * into a newly-allocated vector. 1032 * 1033 * Files ending in ".gz" will have their extensions removed. 1034 * 1035 * We should probably think about skipping files with "illegal" names, 1036 * e.g. illegal characters (/\:) or excessive length. 1037 * 1038 * Returns NULL if the specified directory doesn't exist. 1039 */ 1040SortedVector<AssetDir::FileInfo>* AssetManager::scanDirLocked(const String8& path) 1041{ 1042 SortedVector<AssetDir::FileInfo>* pContents = NULL; 1043 DIR* dir; 1044 struct dirent* entry; 1045 FileType fileType; 1046 1047 LOGV("Scanning dir '%s'\n", path.string()); 1048 1049 dir = opendir(path.string()); 1050 if (dir == NULL) 1051 return NULL; 1052 1053 pContents = new SortedVector<AssetDir::FileInfo>; 1054 1055 while (1) { 1056 entry = readdir(dir); 1057 if (entry == NULL) 1058 break; 1059 1060 if (strcmp(entry->d_name, ".") == 0 || 1061 strcmp(entry->d_name, "..") == 0) 1062 continue; 1063 1064#ifdef _DIRENT_HAVE_D_TYPE 1065 if (entry->d_type == DT_REG) 1066 fileType = kFileTypeRegular; 1067 else if (entry->d_type == DT_DIR) 1068 fileType = kFileTypeDirectory; 1069 else 1070 fileType = kFileTypeUnknown; 1071#else 1072 // stat the file 1073 fileType = ::getFileType(path.appendPathCopy(entry->d_name).string()); 1074#endif 1075 1076 if (fileType != kFileTypeRegular && fileType != kFileTypeDirectory) 1077 continue; 1078 1079 AssetDir::FileInfo info; 1080 info.set(String8(entry->d_name), fileType); 1081 if (strcasecmp(info.getFileName().getPathExtension().string(), ".gz") == 0) 1082 info.setFileName(info.getFileName().getBasePath()); 1083 info.setSourceName(path.appendPathCopy(info.getFileName())); 1084 pContents->add(info); 1085 } 1086 1087 closedir(dir); 1088 return pContents; 1089} 1090 1091/* 1092 * Scan the contents out of the specified Zip archive, and merge what we 1093 * find into "pMergedInfo". If the Zip archive in question doesn't exist, 1094 * we return immediately. 1095 * 1096 * Returns "false" if we found nothing to contribute. 1097 */ 1098bool AssetManager::scanAndMergeZipLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, 1099 const asset_path& ap, const char* rootDir, const char* baseDirName) 1100{ 1101 ZipFileRO* pZip; 1102 Vector<String8> dirs; 1103 AssetDir::FileInfo info; 1104 SortedVector<AssetDir::FileInfo> contents; 1105 String8 sourceName, zipName, dirName; 1106 1107 pZip = mZipSet.getZip(ap.path); 1108 if (pZip == NULL) { 1109 LOGW("Failure opening zip %s\n", ap.path.string()); 1110 return false; 1111 } 1112 1113 zipName = ZipSet::getPathName(ap.path.string()); 1114 1115 /* convert "sounds" to "rootDir/sounds" */ 1116 if (rootDir != NULL) dirName = rootDir; 1117 dirName.appendPath(baseDirName); 1118 1119 /* 1120 * Scan through the list of files, looking for a match. The files in 1121 * the Zip table of contents are not in sorted order, so we have to 1122 * process the entire list. We're looking for a string that begins 1123 * with the characters in "dirName", is followed by a '/', and has no 1124 * subsequent '/' in the stuff that follows. 1125 * 1126 * What makes this especially fun is that directories are not stored 1127 * explicitly in Zip archives, so we have to infer them from context. 1128 * When we see "sounds/foo.wav" we have to leave a note to ourselves 1129 * to insert a directory called "sounds" into the list. We store 1130 * these in temporary vector so that we only return each one once. 1131 * 1132 * Name comparisons are case-sensitive to match UNIX filesystem 1133 * semantics. 1134 */ 1135 int dirNameLen = dirName.length(); 1136 for (int i = 0; i < pZip->getNumEntries(); i++) { 1137 ZipEntryRO entry; 1138 char nameBuf[256]; 1139 1140 entry = pZip->findEntryByIndex(i); 1141 if (pZip->getEntryFileName(entry, nameBuf, sizeof(nameBuf)) != 0) { 1142 // TODO: fix this if we expect to have long names 1143 LOGE("ARGH: name too long?\n"); 1144 continue; 1145 } 1146 if (dirNameLen == 0 || 1147 (strncmp(nameBuf, dirName.string(), dirNameLen) == 0 && 1148 nameBuf[dirNameLen] == '/')) 1149 { 1150 const char* cp; 1151 const char* nextSlash; 1152 1153 cp = nameBuf + dirNameLen; 1154 if (dirNameLen != 0) 1155 cp++; // advance past the '/' 1156 1157 nextSlash = strchr(cp, '/'); 1158//xxx this may break if there are bare directory entries 1159 if (nextSlash == NULL) { 1160 /* this is a file in the requested directory */ 1161 1162 info.set(String8(nameBuf).getPathLeaf(), kFileTypeRegular); 1163 1164 info.setSourceName( 1165 createZipSourceNameLocked(zipName, dirName, info.getFileName())); 1166 1167 contents.add(info); 1168 //printf("FOUND: file '%s'\n", (const char*) info.mFileName); 1169 } else { 1170 /* this is a subdir; add it if we don't already have it*/ 1171 String8 subdirName(cp, nextSlash - cp); 1172 size_t j; 1173 size_t N = dirs.size(); 1174 1175 for (j = 0; j < N; j++) { 1176 if (subdirName == dirs[j]) { 1177 break; 1178 } 1179 } 1180 if (j == N) { 1181 dirs.add(subdirName); 1182 } 1183 1184 //printf("FOUND: dir '%s'\n", (const char*) subdirName); 1185 } 1186 } 1187 } 1188 1189 /* 1190 * Add the set of unique directories. 1191 */ 1192 for (int i = 0; i < (int) dirs.size(); i++) { 1193 info.set(dirs[i], kFileTypeDirectory); 1194 info.setSourceName( 1195 createZipSourceNameLocked(zipName, dirName, info.getFileName())); 1196 contents.add(info); 1197 } 1198 1199 mergeInfoLocked(pMergedInfo, &contents); 1200 1201 return true; 1202} 1203 1204 1205/* 1206 * Merge two vectors of FileInfo. 1207 * 1208 * The merged contents will be stuffed into *pMergedInfo. 1209 * 1210 * If an entry for a file exists in both "pMergedInfo" and "pContents", 1211 * we use the newer "pContents" entry. 1212 */ 1213void AssetManager::mergeInfoLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, 1214 const SortedVector<AssetDir::FileInfo>* pContents) 1215{ 1216 /* 1217 * Merge what we found in this directory with what we found in 1218 * other places. 1219 * 1220 * Two basic approaches: 1221 * (1) Create a new array that holds the unique values of the two 1222 * arrays. 1223 * (2) Take the elements from pContents and shove them into pMergedInfo. 1224 * 1225 * Because these are vectors of complex objects, moving elements around 1226 * inside the vector requires constructing new objects and allocating 1227 * storage for members. With approach #1, we're always adding to the 1228 * end, whereas with #2 we could be inserting multiple elements at the 1229 * front of the vector. Approach #1 requires a full copy of the 1230 * contents of pMergedInfo, but approach #2 requires the same copy for 1231 * every insertion at the front of pMergedInfo. 1232 * 1233 * (We should probably use a SortedVector interface that allows us to 1234 * just stuff items in, trusting us to maintain the sort order.) 1235 */ 1236 SortedVector<AssetDir::FileInfo>* pNewSorted; 1237 int mergeMax, contMax; 1238 int mergeIdx, contIdx; 1239 1240 pNewSorted = new SortedVector<AssetDir::FileInfo>; 1241 mergeMax = pMergedInfo->size(); 1242 contMax = pContents->size(); 1243 mergeIdx = contIdx = 0; 1244 1245 while (mergeIdx < mergeMax || contIdx < contMax) { 1246 if (mergeIdx == mergeMax) { 1247 /* hit end of "merge" list, copy rest of "contents" */ 1248 pNewSorted->add(pContents->itemAt(contIdx)); 1249 contIdx++; 1250 } else if (contIdx == contMax) { 1251 /* hit end of "cont" list, copy rest of "merge" */ 1252 pNewSorted->add(pMergedInfo->itemAt(mergeIdx)); 1253 mergeIdx++; 1254 } else if (pMergedInfo->itemAt(mergeIdx) == pContents->itemAt(contIdx)) 1255 { 1256 /* items are identical, add newer and advance both indices */ 1257 pNewSorted->add(pContents->itemAt(contIdx)); 1258 mergeIdx++; 1259 contIdx++; 1260 } else if (pMergedInfo->itemAt(mergeIdx) < pContents->itemAt(contIdx)) 1261 { 1262 /* "merge" is lower, add that one */ 1263 pNewSorted->add(pMergedInfo->itemAt(mergeIdx)); 1264 mergeIdx++; 1265 } else { 1266 /* "cont" is lower, add that one */ 1267 assert(pContents->itemAt(contIdx) < pMergedInfo->itemAt(mergeIdx)); 1268 pNewSorted->add(pContents->itemAt(contIdx)); 1269 contIdx++; 1270 } 1271 } 1272 1273 /* 1274 * Overwrite the "merged" list with the new stuff. 1275 */ 1276 *pMergedInfo = *pNewSorted; 1277 delete pNewSorted; 1278 1279#if 0 // for Vector, rather than SortedVector 1280 int i, j; 1281 for (i = pContents->size() -1; i >= 0; i--) { 1282 bool add = true; 1283 1284 for (j = pMergedInfo->size() -1; j >= 0; j--) { 1285 /* case-sensitive comparisons, to behave like UNIX fs */ 1286 if (strcmp(pContents->itemAt(i).mFileName, 1287 pMergedInfo->itemAt(j).mFileName) == 0) 1288 { 1289 /* match, don't add this entry */ 1290 add = false; 1291 break; 1292 } 1293 } 1294 1295 if (add) 1296 pMergedInfo->add(pContents->itemAt(i)); 1297 } 1298#endif 1299} 1300 1301 1302/* 1303 * Load all files into the file name cache. We want to do this across 1304 * all combinations of { appname, locale, vendor }, performing a recursive 1305 * directory traversal. 1306 * 1307 * This is not the most efficient data structure. Also, gathering the 1308 * information as we needed it (file-by-file or directory-by-directory) 1309 * would be faster. However, on the actual device, 99% of the files will 1310 * live in Zip archives, so this list will be very small. The trouble 1311 * is that we have to check the "loose" files first, so it's important 1312 * that we don't beat the filesystem silly looking for files that aren't 1313 * there. 1314 * 1315 * Note on thread safety: this is the only function that causes updates 1316 * to mCache, and anybody who tries to use it will call here if !mCacheValid, 1317 * so we need to employ a mutex here. 1318 */ 1319void AssetManager::loadFileNameCacheLocked(void) 1320{ 1321 assert(!mCacheValid); 1322 assert(mCache.size() == 0); 1323 1324#ifdef DO_TIMINGS // need to link against -lrt for this now 1325 DurationTimer timer; 1326 timer.start(); 1327#endif 1328 1329 fncScanLocked(&mCache, ""); 1330 1331#ifdef DO_TIMINGS 1332 timer.stop(); 1333 LOGD("Cache scan took %.3fms\n", 1334 timer.durationUsecs() / 1000.0); 1335#endif 1336 1337#if 0 1338 int i; 1339 printf("CACHED FILE LIST (%d entries):\n", mCache.size()); 1340 for (i = 0; i < (int) mCache.size(); i++) { 1341 printf(" %d: (%d) '%s'\n", i, 1342 mCache.itemAt(i).getFileType(), 1343 (const char*) mCache.itemAt(i).getFileName()); 1344 } 1345#endif 1346 1347 mCacheValid = true; 1348} 1349 1350/* 1351 * Scan up to 8 versions of the specified directory. 1352 */ 1353void AssetManager::fncScanLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, 1354 const char* dirName) 1355{ 1356 size_t i = mAssetPaths.size(); 1357 while (i > 0) { 1358 i--; 1359 const asset_path& ap = mAssetPaths.itemAt(i); 1360 fncScanAndMergeDirLocked(pMergedInfo, ap, NULL, NULL, dirName); 1361 if (mLocale != NULL) 1362 fncScanAndMergeDirLocked(pMergedInfo, ap, mLocale, NULL, dirName); 1363 if (mVendor != NULL) 1364 fncScanAndMergeDirLocked(pMergedInfo, ap, NULL, mVendor, dirName); 1365 if (mLocale != NULL && mVendor != NULL) 1366 fncScanAndMergeDirLocked(pMergedInfo, ap, mLocale, mVendor, dirName); 1367 } 1368} 1369 1370/* 1371 * Recursively scan this directory and all subdirs. 1372 * 1373 * This is similar to scanAndMergeDir, but we don't remove the .EXCLUDE 1374 * files, and we prepend the extended partial path to the filenames. 1375 */ 1376bool AssetManager::fncScanAndMergeDirLocked( 1377 SortedVector<AssetDir::FileInfo>* pMergedInfo, 1378 const asset_path& ap, const char* locale, const char* vendor, 1379 const char* dirName) 1380{ 1381 SortedVector<AssetDir::FileInfo>* pContents; 1382 String8 partialPath; 1383 String8 fullPath; 1384 1385 // XXX This is broken -- the filename cache needs to hold the base 1386 // asset path separately from its filename. 1387 1388 partialPath = createPathNameLocked(ap, locale, vendor); 1389 if (dirName[0] != '\0') { 1390 partialPath.appendPath(dirName); 1391 } 1392 1393 fullPath = partialPath; 1394 pContents = scanDirLocked(fullPath); 1395 if (pContents == NULL) { 1396 return false; // directory did not exist 1397 } 1398 1399 /* 1400 * Scan all subdirectories of the current dir, merging what we find 1401 * into "pMergedInfo". 1402 */ 1403 for (int i = 0; i < (int) pContents->size(); i++) { 1404 if (pContents->itemAt(i).getFileType() == kFileTypeDirectory) { 1405 String8 subdir(dirName); 1406 subdir.appendPath(pContents->itemAt(i).getFileName()); 1407 1408 fncScanAndMergeDirLocked(pMergedInfo, ap, locale, vendor, subdir.string()); 1409 } 1410 } 1411 1412 /* 1413 * To be consistent, we want entries for the root directory. If 1414 * we're the root, add one now. 1415 */ 1416 if (dirName[0] == '\0') { 1417 AssetDir::FileInfo tmpInfo; 1418 1419 tmpInfo.set(String8(""), kFileTypeDirectory); 1420 tmpInfo.setSourceName(createPathNameLocked(ap, locale, vendor)); 1421 pContents->add(tmpInfo); 1422 } 1423 1424 /* 1425 * We want to prepend the extended partial path to every entry in 1426 * "pContents". It's the same value for each entry, so this will 1427 * not change the sorting order of the vector contents. 1428 */ 1429 for (int i = 0; i < (int) pContents->size(); i++) { 1430 const AssetDir::FileInfo& info = pContents->itemAt(i); 1431 pContents->editItemAt(i).setFileName(partialPath.appendPathCopy(info.getFileName())); 1432 } 1433 1434 mergeInfoLocked(pMergedInfo, pContents); 1435 return true; 1436} 1437 1438/* 1439 * Trash the cache. 1440 */ 1441void AssetManager::purgeFileNameCacheLocked(void) 1442{ 1443 mCacheValid = false; 1444 mCache.clear(); 1445} 1446 1447/* 1448 * =========================================================================== 1449 * AssetManager::SharedZip 1450 * =========================================================================== 1451 */ 1452 1453 1454Mutex AssetManager::SharedZip::gLock; 1455DefaultKeyedVector<String8, wp<AssetManager::SharedZip> > AssetManager::SharedZip::gOpen; 1456 1457AssetManager::SharedZip::SharedZip(const String8& path, time_t modWhen) 1458 : mPath(path), mZipFile(NULL), mModWhen(modWhen), mResourceTableAsset(NULL) 1459{ 1460 //LOGI("Creating SharedZip %p %s\n", this, (const char*)mPath); 1461 mZipFile = new ZipFileRO; 1462 LOGV("+++ opening zip '%s'\n", mPath.string()); 1463 if (mZipFile->open(mPath.string()) != NO_ERROR) { 1464 LOGD("failed to open Zip archive '%s'\n", mPath.string()); 1465 delete mZipFile; 1466 mZipFile = NULL; 1467 } 1468} 1469 1470sp<AssetManager::SharedZip> AssetManager::SharedZip::get(const String8& path) 1471{ 1472 AutoMutex _l(gLock); 1473 time_t modWhen = getFileModDate(path); 1474 sp<SharedZip> zip = gOpen.valueFor(path).promote(); 1475 if (zip != NULL && zip->mModWhen == modWhen) { 1476 return zip; 1477 } 1478 zip = new SharedZip(path, modWhen); 1479 gOpen.add(path, zip); 1480 return zip; 1481 1482} 1483 1484ZipFileRO* AssetManager::SharedZip::getZip() 1485{ 1486 return mZipFile; 1487} 1488 1489Asset* AssetManager::SharedZip::getResourceTableAsset() 1490{ 1491 LOGV("Getting from SharedZip %p resource asset %p\n", this, mResourceTableAsset); 1492 return mResourceTableAsset; 1493} 1494 1495Asset* AssetManager::SharedZip::setResourceTableAsset(Asset* asset) 1496{ 1497 { 1498 AutoMutex _l(gLock); 1499 if (mResourceTableAsset == NULL) { 1500 mResourceTableAsset = asset; 1501 // This is not thread safe the first time it is called, so 1502 // do it here with the global lock held. 1503 asset->getBuffer(true); 1504 return asset; 1505 } 1506 } 1507 delete asset; 1508 return mResourceTableAsset; 1509} 1510 1511bool AssetManager::SharedZip::isUpToDate() 1512{ 1513 time_t modWhen = getFileModDate(mPath.string()); 1514 return mModWhen == modWhen; 1515} 1516 1517AssetManager::SharedZip::~SharedZip() 1518{ 1519 //LOGI("Destroying SharedZip %p %s\n", this, (const char*)mPath); 1520 if (mResourceTableAsset != NULL) { 1521 delete mResourceTableAsset; 1522 } 1523 if (mZipFile != NULL) { 1524 delete mZipFile; 1525 LOGV("Closed '%s'\n", mPath.string()); 1526 } 1527} 1528 1529/* 1530 * =========================================================================== 1531 * AssetManager::ZipSet 1532 * =========================================================================== 1533 */ 1534 1535/* 1536 * Constructor. 1537 */ 1538AssetManager::ZipSet::ZipSet(void) 1539{ 1540} 1541 1542/* 1543 * Destructor. Close any open archives. 1544 */ 1545AssetManager::ZipSet::~ZipSet(void) 1546{ 1547 size_t N = mZipFile.size(); 1548 for (size_t i = 0; i < N; i++) 1549 closeZip(i); 1550} 1551 1552/* 1553 * Close a Zip file and reset the entry. 1554 */ 1555void AssetManager::ZipSet::closeZip(int idx) 1556{ 1557 mZipFile.editItemAt(idx) = NULL; 1558} 1559 1560 1561/* 1562 * Retrieve the appropriate Zip file from the set. 1563 */ 1564ZipFileRO* AssetManager::ZipSet::getZip(const String8& path) 1565{ 1566 int idx = getIndex(path); 1567 sp<SharedZip> zip = mZipFile[idx]; 1568 if (zip == NULL) { 1569 zip = SharedZip::get(path); 1570 mZipFile.editItemAt(idx) = zip; 1571 } 1572 return zip->getZip(); 1573} 1574 1575Asset* AssetManager::ZipSet::getZipResourceTable(const String8& path) 1576{ 1577 int idx = getIndex(path); 1578 sp<SharedZip> zip = mZipFile[idx]; 1579 if (zip == NULL) { 1580 zip = SharedZip::get(path); 1581 mZipFile.editItemAt(idx) = zip; 1582 } 1583 return zip->getResourceTableAsset(); 1584} 1585 1586Asset* AssetManager::ZipSet::setZipResourceTable(const String8& path, 1587 Asset* asset) 1588{ 1589 int idx = getIndex(path); 1590 sp<SharedZip> zip = mZipFile[idx]; 1591 // doesn't make sense to call before previously accessing. 1592 return zip->setResourceTableAsset(asset); 1593} 1594 1595/* 1596 * Generate the partial pathname for the specified archive. The caller 1597 * gets to prepend the asset root directory. 1598 * 1599 * Returns something like "common/en-US-noogle.jar". 1600 */ 1601/*static*/ String8 AssetManager::ZipSet::getPathName(const char* zipPath) 1602{ 1603 return String8(zipPath); 1604} 1605 1606bool AssetManager::ZipSet::isUpToDate() 1607{ 1608 const size_t N = mZipFile.size(); 1609 for (size_t i=0; i<N; i++) { 1610 if (mZipFile[i] != NULL && !mZipFile[i]->isUpToDate()) { 1611 return false; 1612 } 1613 } 1614 return true; 1615} 1616 1617/* 1618 * Compute the zip file's index. 1619 * 1620 * "appName", "locale", and "vendor" should be set to NULL to indicate the 1621 * default directory. 1622 */ 1623int AssetManager::ZipSet::getIndex(const String8& zip) const 1624{ 1625 const size_t N = mZipPath.size(); 1626 for (size_t i=0; i<N; i++) { 1627 if (mZipPath[i] == zip) { 1628 return i; 1629 } 1630 } 1631 1632 mZipPath.add(zip); 1633 mZipFile.add(NULL); 1634 1635 return mZipPath.size()-1; 1636} 1637 1638