diff options
Diffstat (limited to 'libs/utils/AssetManager.cpp')
| -rw-r--r-- | libs/utils/AssetManager.cpp | 2001 |
1 files changed, 0 insertions, 2001 deletions
diff --git a/libs/utils/AssetManager.cpp b/libs/utils/AssetManager.cpp deleted file mode 100644 index 4829add..0000000 --- a/libs/utils/AssetManager.cpp +++ /dev/null @@ -1,2001 +0,0 @@ -/* - * Copyright (C) 2006 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -// -// Provide access to read-only assets. -// - -#define LOG_TAG "asset" -//#define LOG_NDEBUG 0 - -#include <androidfw/Asset.h> -#include <androidfw/AssetDir.h> -#include <androidfw/AssetManager.h> -#include <androidfw/ResourceTypes.h> -#include <androidfw/ZipFileRO.h> -#include <utils/Atomic.h> -#include <utils/Log.h> -#include <utils/String8.h> -#include <utils/String8.h> -#include <utils/threads.h> -#include <utils/Timers.h> - -#include <assert.h> -#include <dirent.h> -#include <errno.h> -#include <fcntl.h> -#include <strings.h> -#include <sys/stat.h> -#include <unistd.h> - -#ifndef TEMP_FAILURE_RETRY -/* Used to retry syscalls that can return EINTR. */ -#define TEMP_FAILURE_RETRY(exp) ({ \ - typeof (exp) _rc; \ - do { \ - _rc = (exp); \ - } while (_rc == -1 && errno == EINTR); \ - _rc; }) -#endif - -using namespace android; - -/* - * Names for default app, locale, and vendor. We might want to change - * these to be an actual locale, e.g. always use en-US as the default. - */ -static const char* kDefaultLocale = "default"; -static const char* kDefaultVendor = "default"; -static const char* kAssetsRoot = "assets"; -static const char* kAppZipName = NULL; //"classes.jar"; -static const char* kSystemAssets = "framework/framework-res.apk"; -static const char* kIdmapCacheDir = "resource-cache"; - -static const char* kExcludeExtension = ".EXCLUDE"; - -static Asset* const kExcludedAsset = (Asset*) 0xd000000d; - -static volatile int32_t gCount = 0; - -namespace { - // Transform string /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap - String8 idmapPathForPackagePath(const String8& pkgPath) - { - const char* root = getenv("ANDROID_DATA"); - LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_DATA not set"); - String8 path(root); - path.appendPath(kIdmapCacheDir); - - char buf[256]; // 256 chars should be enough for anyone... - strncpy(buf, pkgPath.string(), 255); - buf[255] = '\0'; - char* filename = buf; - while (*filename && *filename == '/') { - ++filename; - } - char* p = filename; - while (*p) { - if (*p == '/') { - *p = '@'; - } - ++p; - } - path.appendPath(filename); - path.append("@idmap"); - - return path; - } -} - -/* - * =========================================================================== - * AssetManager - * =========================================================================== - */ - -int32_t AssetManager::getGlobalCount() -{ - return gCount; -} - -AssetManager::AssetManager(CacheMode cacheMode) - : mLocale(NULL), mVendor(NULL), - mResources(NULL), mConfig(new ResTable_config), - mCacheMode(cacheMode), mCacheValid(false) -{ - int count = android_atomic_inc(&gCount)+1; - //ALOGI("Creating AssetManager %p #%d\n", this, count); - memset(mConfig, 0, sizeof(ResTable_config)); -} - -AssetManager::~AssetManager(void) -{ - int count = android_atomic_dec(&gCount); - //ALOGI("Destroying AssetManager in %p #%d\n", this, count); - - delete mConfig; - delete mResources; - - // don't have a String class yet, so make sure we clean up - delete[] mLocale; - delete[] mVendor; -} - -bool AssetManager::addAssetPath(const String8& path, void** cookie) -{ - AutoMutex _l(mLock); - - asset_path ap; - - String8 realPath(path); - if (kAppZipName) { - realPath.appendPath(kAppZipName); - } - ap.type = ::getFileType(realPath.string()); - if (ap.type == kFileTypeRegular) { - ap.path = realPath; - } else { - ap.path = path; - ap.type = ::getFileType(path.string()); - if (ap.type != kFileTypeDirectory && ap.type != kFileTypeRegular) { - ALOGW("Asset path %s is neither a directory nor file (type=%d).", - path.string(), (int)ap.type); - return false; - } - } - - // Skip if we have it already. - for (size_t i=0; i<mAssetPaths.size(); i++) { - if (mAssetPaths[i].path == ap.path) { - if (cookie) { - *cookie = (void*)(i+1); - } - return true; - } - } - - ALOGV("In %p Asset %s path: %s", this, - ap.type == kFileTypeDirectory ? "dir" : "zip", ap.path.string()); - - mAssetPaths.add(ap); - - // new paths are always added at the end - if (cookie) { - *cookie = (void*)mAssetPaths.size(); - } - - // add overlay packages for /system/framework; apps are handled by the - // (Java) package manager - if (strncmp(path.string(), "/system/framework/", 18) == 0) { - // When there is an environment variable for /vendor, this - // should be changed to something similar to how ANDROID_ROOT - // and ANDROID_DATA are used in this file. - String8 overlayPath("/vendor/overlay/framework/"); - overlayPath.append(path.getPathLeaf()); - if (TEMP_FAILURE_RETRY(access(overlayPath.string(), R_OK)) == 0) { - asset_path oap; - oap.path = overlayPath; - oap.type = ::getFileType(overlayPath.string()); - bool addOverlay = (oap.type == kFileTypeRegular); // only .apks supported as overlay - if (addOverlay) { - oap.idmap = idmapPathForPackagePath(overlayPath); - - if (isIdmapStaleLocked(ap.path, oap.path, oap.idmap)) { - addOverlay = createIdmapFileLocked(ap.path, oap.path, oap.idmap); - } - } - if (addOverlay) { - mAssetPaths.add(oap); - } else { - ALOGW("failed to add overlay package %s\n", overlayPath.string()); - } - } - } - - return true; -} - -bool AssetManager::isIdmapStaleLocked(const String8& originalPath, const String8& overlayPath, - const String8& idmapPath) -{ - struct stat st; - if (TEMP_FAILURE_RETRY(stat(idmapPath.string(), &st)) == -1) { - if (errno == ENOENT) { - return true; // non-existing idmap is always stale - } else { - ALOGW("failed to stat file %s: %s\n", idmapPath.string(), strerror(errno)); - return false; - } - } - if (st.st_size < ResTable::IDMAP_HEADER_SIZE_BYTES) { - ALOGW("file %s has unexpectedly small size=%zd\n", idmapPath.string(), (size_t)st.st_size); - return false; - } - int fd = TEMP_FAILURE_RETRY(::open(idmapPath.string(), O_RDONLY)); - if (fd == -1) { - ALOGW("failed to open file %s: %s\n", idmapPath.string(), strerror(errno)); - return false; - } - char buf[ResTable::IDMAP_HEADER_SIZE_BYTES]; - ssize_t bytesLeft = ResTable::IDMAP_HEADER_SIZE_BYTES; - for (;;) { - ssize_t r = TEMP_FAILURE_RETRY(read(fd, buf + ResTable::IDMAP_HEADER_SIZE_BYTES - bytesLeft, - bytesLeft)); - if (r < 0) { - TEMP_FAILURE_RETRY(close(fd)); - return false; - } - bytesLeft -= r; - if (bytesLeft == 0) { - break; - } - } - TEMP_FAILURE_RETRY(close(fd)); - - uint32_t cachedOriginalCrc, cachedOverlayCrc; - if (!ResTable::getIdmapInfo(buf, ResTable::IDMAP_HEADER_SIZE_BYTES, - &cachedOriginalCrc, &cachedOverlayCrc)) { - return false; - } - - uint32_t actualOriginalCrc, actualOverlayCrc; - if (!getZipEntryCrcLocked(originalPath, "resources.arsc", &actualOriginalCrc)) { - return false; - } - if (!getZipEntryCrcLocked(overlayPath, "resources.arsc", &actualOverlayCrc)) { - return false; - } - return cachedOriginalCrc != actualOriginalCrc || cachedOverlayCrc != actualOverlayCrc; -} - -bool AssetManager::getZipEntryCrcLocked(const String8& zipPath, const char* entryFilename, - uint32_t* pCrc) -{ - asset_path ap; - ap.path = zipPath; - const ZipFileRO* zip = getZipFileLocked(ap); - if (zip == NULL) { - return false; - } - const ZipEntryRO entry = zip->findEntryByName(entryFilename); - if (entry == NULL) { - return false; - } - if (!zip->getEntryInfo(entry, NULL, NULL, NULL, NULL, NULL, (long*)pCrc)) { - return false; - } - return true; -} - -bool AssetManager::createIdmapFileLocked(const String8& originalPath, const String8& overlayPath, - const String8& idmapPath) -{ - ALOGD("%s: originalPath=%s overlayPath=%s idmapPath=%s\n", - __FUNCTION__, originalPath.string(), overlayPath.string(), idmapPath.string()); - ResTable tables[2]; - const String8* paths[2] = { &originalPath, &overlayPath }; - uint32_t originalCrc, overlayCrc; - bool retval = false; - ssize_t offset = 0; - int fd = 0; - uint32_t* data = NULL; - size_t size; - - for (int i = 0; i < 2; ++i) { - asset_path ap; - ap.type = kFileTypeRegular; - ap.path = *paths[i]; - Asset* ass = openNonAssetInPathLocked("resources.arsc", Asset::ACCESS_BUFFER, ap); - if (ass == NULL) { - ALOGW("failed to find resources.arsc in %s\n", ap.path.string()); - goto error; - } - tables[i].add(ass, (void*)1, false); - } - - if (!getZipEntryCrcLocked(originalPath, "resources.arsc", &originalCrc)) { - ALOGW("failed to retrieve crc for resources.arsc in %s\n", originalPath.string()); - goto error; - } - if (!getZipEntryCrcLocked(overlayPath, "resources.arsc", &overlayCrc)) { - ALOGW("failed to retrieve crc for resources.arsc in %s\n", overlayPath.string()); - goto error; - } - - if (tables[0].createIdmap(tables[1], originalCrc, overlayCrc, - (void**)&data, &size) != NO_ERROR) { - ALOGW("failed to generate idmap data for file %s\n", idmapPath.string()); - goto error; - } - - // This should be abstracted (eg replaced by a stand-alone - // application like dexopt, triggered by something equivalent to - // installd). - fd = TEMP_FAILURE_RETRY(::open(idmapPath.string(), O_WRONLY | O_CREAT | O_TRUNC, 0644)); - if (fd == -1) { - ALOGW("failed to write idmap file %s (open: %s)\n", idmapPath.string(), strerror(errno)); - goto error_free; - } - for (;;) { - ssize_t written = TEMP_FAILURE_RETRY(write(fd, data + offset, size)); - if (written < 0) { - ALOGW("failed to write idmap file %s (write: %s)\n", idmapPath.string(), - strerror(errno)); - goto error_close; - } - size -= (size_t)written; - offset += written; - if (size == 0) { - break; - } - } - - retval = true; -error_close: - TEMP_FAILURE_RETRY(close(fd)); -error_free: - free(data); -error: - return retval; -} - -bool AssetManager::addDefaultAssets() -{ - const char* root = getenv("ANDROID_ROOT"); - LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_ROOT not set"); - - String8 path(root); - path.appendPath(kSystemAssets); - - return addAssetPath(path, NULL); -} - -void* AssetManager::nextAssetPath(void* cookie) const -{ - AutoMutex _l(mLock); - size_t next = ((size_t)cookie)+1; - return next > mAssetPaths.size() ? NULL : (void*)next; -} - -String8 AssetManager::getAssetPath(void* cookie) const -{ - AutoMutex _l(mLock); - const size_t which = ((size_t)cookie)-1; - if (which < mAssetPaths.size()) { - return mAssetPaths[which].path; - } - return String8(); -} - -/* - * Set the current locale. Use NULL to indicate no locale. - * - * Close and reopen Zip archives as appropriate, and reset cached - * information in the locale-specific sections of the tree. - */ -void AssetManager::setLocale(const char* locale) -{ - AutoMutex _l(mLock); - setLocaleLocked(locale); -} - -void AssetManager::setLocaleLocked(const char* locale) -{ - if (mLocale != NULL) { - /* previously set, purge cached data */ - purgeFileNameCacheLocked(); - //mZipSet.purgeLocale(); - delete[] mLocale; - } - mLocale = strdupNew(locale); - - updateResourceParamsLocked(); -} - -/* - * Set the current vendor. Use NULL to indicate no vendor. - * - * Close and reopen Zip archives as appropriate, and reset cached - * information in the vendor-specific sections of the tree. - */ -void AssetManager::setVendor(const char* vendor) -{ - AutoMutex _l(mLock); - - if (mVendor != NULL) { - /* previously set, purge cached data */ - purgeFileNameCacheLocked(); - //mZipSet.purgeVendor(); - delete[] mVendor; - } - mVendor = strdupNew(vendor); -} - -void AssetManager::setConfiguration(const ResTable_config& config, const char* locale) -{ - AutoMutex _l(mLock); - *mConfig = config; - if (locale) { - setLocaleLocked(locale); - } else if (config.language[0] != 0) { - char spec[9]; - spec[0] = config.language[0]; - spec[1] = config.language[1]; - if (config.country[0] != 0) { - spec[2] = '_'; - spec[3] = config.country[0]; - spec[4] = config.country[1]; - spec[5] = 0; - } else { - spec[3] = 0; - } - setLocaleLocked(spec); - } else { - updateResourceParamsLocked(); - } -} - -void AssetManager::getConfiguration(ResTable_config* outConfig) const -{ - AutoMutex _l(mLock); - *outConfig = *mConfig; -} - -/* - * Open an asset. - * - * The data could be; - * - In a file on disk (assetBase + fileName). - * - In a compressed file on disk (assetBase + fileName.gz). - * - In a Zip archive, uncompressed or compressed. - * - * It can be in a number of different directories and Zip archives. - * The search order is: - * - [appname] - * - locale + vendor - * - "default" + vendor - * - locale + "default" - * - "default + "default" - * - "common" - * - (same as above) - * - * To find a particular file, we have to try up to eight paths with - * all three forms of data. - * - * We should probably reject requests for "illegal" filenames, e.g. those - * with illegal characters or "../" backward relative paths. - */ -Asset* AssetManager::open(const char* fileName, AccessMode mode) -{ - AutoMutex _l(mLock); - - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - - - if (mCacheMode != CACHE_OFF && !mCacheValid) - loadFileNameCacheLocked(); - - String8 assetName(kAssetsRoot); - assetName.appendPath(fileName); - - /* - * For each top-level asset path, search for the asset. - */ - - size_t i = mAssetPaths.size(); - while (i > 0) { - i--; - ALOGV("Looking for asset '%s' in '%s'\n", - assetName.string(), mAssetPaths.itemAt(i).path.string()); - Asset* pAsset = openNonAssetInPathLocked(assetName.string(), mode, mAssetPaths.itemAt(i)); - if (pAsset != NULL) { - return pAsset != kExcludedAsset ? pAsset : NULL; - } - } - - return NULL; -} - -/* - * Open a non-asset file as if it were an asset. - * - * The "fileName" is the partial path starting from the application - * name. - */ -Asset* AssetManager::openNonAsset(const char* fileName, AccessMode mode) -{ - AutoMutex _l(mLock); - - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - - - if (mCacheMode != CACHE_OFF && !mCacheValid) - loadFileNameCacheLocked(); - - /* - * For each top-level asset path, search for the asset. - */ - - size_t i = mAssetPaths.size(); - while (i > 0) { - i--; - ALOGV("Looking for non-asset '%s' in '%s'\n", fileName, mAssetPaths.itemAt(i).path.string()); - Asset* pAsset = openNonAssetInPathLocked( - fileName, mode, mAssetPaths.itemAt(i)); - if (pAsset != NULL) { - return pAsset != kExcludedAsset ? pAsset : NULL; - } - } - - return NULL; -} - -Asset* AssetManager::openNonAsset(void* cookie, const char* fileName, AccessMode mode) -{ - const size_t which = ((size_t)cookie)-1; - - AutoMutex _l(mLock); - - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - - - if (mCacheMode != CACHE_OFF && !mCacheValid) - loadFileNameCacheLocked(); - - if (which < mAssetPaths.size()) { - ALOGV("Looking for non-asset '%s' in '%s'\n", fileName, - mAssetPaths.itemAt(which).path.string()); - Asset* pAsset = openNonAssetInPathLocked( - fileName, mode, mAssetPaths.itemAt(which)); - if (pAsset != NULL) { - return pAsset != kExcludedAsset ? pAsset : NULL; - } - } - - return NULL; -} - -/* - * Get the type of a file in the asset namespace. - * - * This currently only works for regular files. All others (including - * directories) will return kFileTypeNonexistent. - */ -FileType AssetManager::getFileType(const char* fileName) -{ - Asset* pAsset = NULL; - - /* - * Open the asset. This is less efficient than simply finding the - * file, but it's not too bad (we don't uncompress or mmap data until - * the first read() call). - */ - pAsset = open(fileName, Asset::ACCESS_STREAMING); - delete pAsset; - - if (pAsset == NULL) - return kFileTypeNonexistent; - else - return kFileTypeRegular; -} - -const ResTable* AssetManager::getResTable(bool required) const -{ - ResTable* rt = mResources; - if (rt) { - return rt; - } - - // Iterate through all asset packages, collecting resources from each. - - AutoMutex _l(mLock); - - if (mResources != NULL) { - return mResources; - } - - if (required) { - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - } - - if (mCacheMode != CACHE_OFF && !mCacheValid) - const_cast<AssetManager*>(this)->loadFileNameCacheLocked(); - - const size_t N = mAssetPaths.size(); - for (size_t i=0; i<N; i++) { - Asset* ass = NULL; - ResTable* sharedRes = NULL; - bool shared = true; - const asset_path& ap = mAssetPaths.itemAt(i); - Asset* idmap = openIdmapLocked(ap); - ALOGV("Looking for resource asset in '%s'\n", ap.path.string()); - if (ap.type != kFileTypeDirectory) { - if (i == 0) { - // The first item is typically the framework resources, - // which we want to avoid parsing every time. - sharedRes = const_cast<AssetManager*>(this)-> - mZipSet.getZipResourceTable(ap.path); - } - if (sharedRes == NULL) { - ass = const_cast<AssetManager*>(this)-> - mZipSet.getZipResourceTableAsset(ap.path); - if (ass == NULL) { - ALOGV("loading resource table %s\n", ap.path.string()); - ass = const_cast<AssetManager*>(this)-> - openNonAssetInPathLocked("resources.arsc", - Asset::ACCESS_BUFFER, - ap); - if (ass != NULL && ass != kExcludedAsset) { - ass = const_cast<AssetManager*>(this)-> - mZipSet.setZipResourceTableAsset(ap.path, ass); - } - } - - if (i == 0 && ass != NULL) { - // If this is the first resource table in the asset - // manager, then we are going to cache it so that we - // can quickly copy it out for others. - ALOGV("Creating shared resources for %s", ap.path.string()); - sharedRes = new ResTable(); - sharedRes->add(ass, (void*)(i+1), false, idmap); - sharedRes = const_cast<AssetManager*>(this)-> - mZipSet.setZipResourceTable(ap.path, sharedRes); - } - } - } else { - ALOGV("loading resource table %s\n", ap.path.string()); - Asset* ass = const_cast<AssetManager*>(this)-> - openNonAssetInPathLocked("resources.arsc", - Asset::ACCESS_BUFFER, - ap); - shared = false; - } - if ((ass != NULL || sharedRes != NULL) && ass != kExcludedAsset) { - if (rt == NULL) { - mResources = rt = new ResTable(); - updateResourceParamsLocked(); - } - ALOGV("Installing resource asset %p in to table %p\n", ass, mResources); - if (sharedRes != NULL) { - ALOGV("Copying existing resources for %s", ap.path.string()); - rt->add(sharedRes); - } else { - ALOGV("Parsing resources for %s", ap.path.string()); - rt->add(ass, (void*)(i+1), !shared, idmap); - } - - if (!shared) { - delete ass; - } - } - if (idmap != NULL) { - delete idmap; - } - } - - if (required && !rt) ALOGW("Unable to find resources file resources.arsc"); - if (!rt) { - mResources = rt = new ResTable(); - } - return rt; -} - -void AssetManager::updateResourceParamsLocked() const -{ - ResTable* res = mResources; - if (!res) { - return; - } - - size_t llen = mLocale ? strlen(mLocale) : 0; - mConfig->language[0] = 0; - mConfig->language[1] = 0; - mConfig->country[0] = 0; - mConfig->country[1] = 0; - if (llen >= 2) { - mConfig->language[0] = mLocale[0]; - mConfig->language[1] = mLocale[1]; - } - if (llen >= 5) { - mConfig->country[0] = mLocale[3]; - mConfig->country[1] = mLocale[4]; - } - mConfig->size = sizeof(*mConfig); - - res->setParameters(mConfig); -} - -Asset* AssetManager::openIdmapLocked(const struct asset_path& ap) const -{ - Asset* ass = NULL; - if (ap.idmap.size() != 0) { - ass = const_cast<AssetManager*>(this)-> - openAssetFromFileLocked(ap.idmap, Asset::ACCESS_BUFFER); - if (ass) { - ALOGV("loading idmap %s\n", ap.idmap.string()); - } else { - ALOGW("failed to load idmap %s\n", ap.idmap.string()); - } - } - return ass; -} - -const ResTable& AssetManager::getResources(bool required) const -{ - const ResTable* rt = getResTable(required); - return *rt; -} - -bool AssetManager::isUpToDate() -{ - AutoMutex _l(mLock); - return mZipSet.isUpToDate(); -} - -void AssetManager::getLocales(Vector<String8>* locales) const -{ - ResTable* res = mResources; - if (res != NULL) { - res->getLocales(locales); - } -} - -/* - * Open a non-asset file as if it were an asset, searching for it in the - * specified app. - * - * Pass in a NULL values for "appName" if the common app directory should - * be used. - */ -Asset* AssetManager::openNonAssetInPathLocked(const char* fileName, AccessMode mode, - const asset_path& ap) -{ - Asset* pAsset = NULL; - - /* look at the filesystem on disk */ - if (ap.type == kFileTypeDirectory) { - String8 path(ap.path); - path.appendPath(fileName); - - pAsset = openAssetFromFileLocked(path, mode); - - if (pAsset == NULL) { - /* try again, this time with ".gz" */ - path.append(".gz"); - pAsset = openAssetFromFileLocked(path, mode); - } - - if (pAsset != NULL) { - //printf("FOUND NA '%s' on disk\n", fileName); - pAsset->setAssetSource(path); - } - - /* look inside the zip file */ - } else { - String8 path(fileName); - - /* check the appropriate Zip file */ - ZipFileRO* pZip; - ZipEntryRO entry; - - pZip = getZipFileLocked(ap); - if (pZip != NULL) { - //printf("GOT zip, checking NA '%s'\n", (const char*) path); - entry = pZip->findEntryByName(path.string()); - if (entry != NULL) { - //printf("FOUND NA in Zip file for %s\n", appName ? appName : kAppCommon); - pAsset = openAssetFromZipLocked(pZip, entry, mode, path); - } - } - - if (pAsset != NULL) { - /* create a "source" name, for debug/display */ - pAsset->setAssetSource( - createZipSourceNameLocked(ZipSet::getPathName(ap.path.string()), String8(""), - String8(fileName))); - } - } - - return pAsset; -} - -/* - * Open an asset, searching for it in the directory hierarchy for the - * specified app. - * - * Pass in a NULL values for "appName" if the common app directory should - * be used. - */ -Asset* AssetManager::openInPathLocked(const char* fileName, AccessMode mode, - const asset_path& ap) -{ - Asset* pAsset = NULL; - - /* - * Try various combinations of locale and vendor. - */ - if (mLocale != NULL && mVendor != NULL) - pAsset = openInLocaleVendorLocked(fileName, mode, ap, mLocale, mVendor); - if (pAsset == NULL && mVendor != NULL) - pAsset = openInLocaleVendorLocked(fileName, mode, ap, NULL, mVendor); - if (pAsset == NULL && mLocale != NULL) - pAsset = openInLocaleVendorLocked(fileName, mode, ap, mLocale, NULL); - if (pAsset == NULL) - pAsset = openInLocaleVendorLocked(fileName, mode, ap, NULL, NULL); - - return pAsset; -} - -/* - * Open an asset, searching for it in the directory hierarchy for the - * specified locale and vendor. - * - * We also search in "app.jar". - * - * Pass in NULL values for "appName", "locale", and "vendor" if the - * defaults should be used. - */ -Asset* AssetManager::openInLocaleVendorLocked(const char* fileName, AccessMode mode, - const asset_path& ap, const char* locale, const char* vendor) -{ - Asset* pAsset = NULL; - - if (ap.type == kFileTypeDirectory) { - if (mCacheMode == CACHE_OFF) { - /* look at the filesystem on disk */ - String8 path(createPathNameLocked(ap, locale, vendor)); - path.appendPath(fileName); - - String8 excludeName(path); - excludeName.append(kExcludeExtension); - if (::getFileType(excludeName.string()) != kFileTypeNonexistent) { - /* say no more */ - //printf("+++ excluding '%s'\n", (const char*) excludeName); - return kExcludedAsset; - } - - pAsset = openAssetFromFileLocked(path, mode); - - if (pAsset == NULL) { - /* try again, this time with ".gz" */ - path.append(".gz"); - pAsset = openAssetFromFileLocked(path, mode); - } - - if (pAsset != NULL) - pAsset->setAssetSource(path); - } else { - /* find in cache */ - String8 path(createPathNameLocked(ap, locale, vendor)); - path.appendPath(fileName); - - AssetDir::FileInfo tmpInfo; - bool found = false; - - String8 excludeName(path); - excludeName.append(kExcludeExtension); - - if (mCache.indexOf(excludeName) != NAME_NOT_FOUND) { - /* go no farther */ - //printf("+++ Excluding '%s'\n", (const char*) excludeName); - return kExcludedAsset; - } - - /* - * File compression extensions (".gz") don't get stored in the - * name cache, so we have to try both here. - */ - if (mCache.indexOf(path) != NAME_NOT_FOUND) { - found = true; - pAsset = openAssetFromFileLocked(path, mode); - if (pAsset == NULL) { - /* try again, this time with ".gz" */ - path.append(".gz"); - pAsset = openAssetFromFileLocked(path, mode); - } - } - - if (pAsset != NULL) - pAsset->setAssetSource(path); - - /* - * Don't continue the search into the Zip files. Our cached info - * said it was a file on disk; to be consistent with openDir() - * we want to return the loose asset. If the cached file gets - * removed, we fail. - * - * The alternative is to update our cache when files get deleted, - * or make some sort of "best effort" promise, but for now I'm - * taking the hard line. - */ - if (found) { - if (pAsset == NULL) - ALOGD("Expected file not found: '%s'\n", path.string()); - return pAsset; - } - } - } - - /* - * Either it wasn't found on disk or on the cached view of the disk. - * Dig through the currently-opened set of Zip files. If caching - * is disabled, the Zip file may get reopened. - */ - if (pAsset == NULL && ap.type == kFileTypeRegular) { - String8 path; - - path.appendPath((locale != NULL) ? locale : kDefaultLocale); - path.appendPath((vendor != NULL) ? vendor : kDefaultVendor); - path.appendPath(fileName); - - /* check the appropriate Zip file */ - ZipFileRO* pZip; - ZipEntryRO entry; - - pZip = getZipFileLocked(ap); - if (pZip != NULL) { - //printf("GOT zip, checking '%s'\n", (const char*) path); - entry = pZip->findEntryByName(path.string()); - if (entry != NULL) { - //printf("FOUND in Zip file for %s/%s-%s\n", - // appName, locale, vendor); - pAsset = openAssetFromZipLocked(pZip, entry, mode, path); - } - } - - if (pAsset != NULL) { - /* create a "source" name, for debug/display */ - pAsset->setAssetSource(createZipSourceNameLocked(ZipSet::getPathName(ap.path.string()), - String8(""), String8(fileName))); - } - } - - return pAsset; -} - -/* - * Create a "source name" for a file from a Zip archive. - */ -String8 AssetManager::createZipSourceNameLocked(const String8& zipFileName, - const String8& dirName, const String8& fileName) -{ - String8 sourceName("zip:"); - sourceName.append(zipFileName); - sourceName.append(":"); - if (dirName.length() > 0) { - sourceName.appendPath(dirName); - } - sourceName.appendPath(fileName); - return sourceName; -} - -/* - * Create a path to a loose asset (asset-base/app/locale/vendor). - */ -String8 AssetManager::createPathNameLocked(const asset_path& ap, const char* locale, - const char* vendor) -{ - String8 path(ap.path); - path.appendPath((locale != NULL) ? locale : kDefaultLocale); - path.appendPath((vendor != NULL) ? vendor : kDefaultVendor); - return path; -} - -/* - * Create a path to a loose asset (asset-base/app/rootDir). - */ -String8 AssetManager::createPathNameLocked(const asset_path& ap, const char* rootDir) -{ - String8 path(ap.path); - if (rootDir != NULL) path.appendPath(rootDir); - return path; -} - -/* - * Return a pointer to one of our open Zip archives. Returns NULL if no - * matching Zip file exists. - * - * Right now we have 2 possible Zip files (1 each in app/"common"). - * - * If caching is set to CACHE_OFF, to get the expected behavior we - * need to reopen the Zip file on every request. That would be silly - * and expensive, so instead we just check the file modification date. - * - * Pass in NULL values for "appName", "locale", and "vendor" if the - * generics should be used. - */ -ZipFileRO* AssetManager::getZipFileLocked(const asset_path& ap) -{ - ALOGV("getZipFileLocked() in %p\n", this); - - return mZipSet.getZip(ap.path); -} - -/* - * Try to open an asset from a file on disk. - * - * If the file is compressed with gzip, we seek to the start of the - * deflated data and pass that in (just like we would for a Zip archive). - * - * For uncompressed data, we may already have an mmap()ed version sitting - * around. If so, we want to hand that to the Asset instead. - * - * This returns NULL if the file doesn't exist, couldn't be opened, or - * claims to be a ".gz" but isn't. - */ -Asset* AssetManager::openAssetFromFileLocked(const String8& pathName, - AccessMode mode) -{ - Asset* pAsset = NULL; - - if (strcasecmp(pathName.getPathExtension().string(), ".gz") == 0) { - //printf("TRYING '%s'\n", (const char*) pathName); - pAsset = Asset::createFromCompressedFile(pathName.string(), mode); - } else { - //printf("TRYING '%s'\n", (const char*) pathName); - pAsset = Asset::createFromFile(pathName.string(), mode); - } - - return pAsset; -} - -/* - * Given an entry in a Zip archive, create a new Asset object. - * - * If the entry is uncompressed, we may want to create or share a - * slice of shared memory. - */ -Asset* AssetManager::openAssetFromZipLocked(const ZipFileRO* pZipFile, - const ZipEntryRO entry, AccessMode mode, const String8& entryName) -{ - Asset* pAsset = NULL; - - // TODO: look for previously-created shared memory slice? - int method; - size_t uncompressedLen; - - //printf("USING Zip '%s'\n", pEntry->getFileName()); - - //pZipFile->getEntryInfo(entry, &method, &uncompressedLen, &compressedLen, - // &offset); - if (!pZipFile->getEntryInfo(entry, &method, &uncompressedLen, NULL, NULL, - NULL, NULL)) - { - ALOGW("getEntryInfo failed\n"); - return NULL; - } - - FileMap* dataMap = pZipFile->createEntryFileMap(entry); - if (dataMap == NULL) { - ALOGW("create map from entry failed\n"); - return NULL; - } - - if (method == ZipFileRO::kCompressStored) { - pAsset = Asset::createFromUncompressedMap(dataMap, mode); - ALOGV("Opened uncompressed entry %s in zip %s mode %d: %p", entryName.string(), - dataMap->getFileName(), mode, pAsset); - } else { - pAsset = Asset::createFromCompressedMap(dataMap, method, - uncompressedLen, mode); - ALOGV("Opened compressed entry %s in zip %s mode %d: %p", entryName.string(), - dataMap->getFileName(), mode, pAsset); - } - if (pAsset == NULL) { - /* unexpected */ - ALOGW("create from segment failed\n"); - } - - return pAsset; -} - - - -/* - * Open a directory in the asset namespace. - * - * An "asset directory" is simply the combination of all files in all - * locations, with ".gz" stripped for loose files. With app, locale, and - * vendor defined, we have 8 directories and 2 Zip archives to scan. - * - * Pass in "" for the root dir. - */ -AssetDir* AssetManager::openDir(const char* dirName) -{ - AutoMutex _l(mLock); - - AssetDir* pDir = NULL; - SortedVector<AssetDir::FileInfo>* pMergedInfo = NULL; - - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - assert(dirName != NULL); - - //printf("+++ openDir(%s) in '%s'\n", dirName, (const char*) mAssetBase); - - if (mCacheMode != CACHE_OFF && !mCacheValid) - loadFileNameCacheLocked(); - - pDir = new AssetDir; - - /* - * Scan the various directories, merging what we find into a single - * vector. We want to scan them in reverse priority order so that - * the ".EXCLUDE" processing works correctly. Also, if we decide we - * want to remember where the file is coming from, we'll get the right - * version. - * - * We start with Zip archives, then do loose files. - */ - pMergedInfo = new SortedVector<AssetDir::FileInfo>; - - size_t i = mAssetPaths.size(); - while (i > 0) { - i--; - const asset_path& ap = mAssetPaths.itemAt(i); - if (ap.type == kFileTypeRegular) { - ALOGV("Adding directory %s from zip %s", dirName, ap.path.string()); - scanAndMergeZipLocked(pMergedInfo, ap, kAssetsRoot, dirName); - } else { - ALOGV("Adding directory %s from dir %s", dirName, ap.path.string()); - scanAndMergeDirLocked(pMergedInfo, ap, kAssetsRoot, dirName); - } - } - -#if 0 - printf("FILE LIST:\n"); - for (i = 0; i < (size_t) pMergedInfo->size(); i++) { - printf(" %d: (%d) '%s'\n", i, - pMergedInfo->itemAt(i).getFileType(), - (const char*) pMergedInfo->itemAt(i).getFileName()); - } -#endif - - pDir->setFileList(pMergedInfo); - return pDir; -} - -/* - * Open a directory in the non-asset namespace. - * - * An "asset directory" is simply the combination of all files in all - * locations, with ".gz" stripped for loose files. With app, locale, and - * vendor defined, we have 8 directories and 2 Zip archives to scan. - * - * Pass in "" for the root dir. - */ -AssetDir* AssetManager::openNonAssetDir(void* cookie, const char* dirName) -{ - AutoMutex _l(mLock); - - AssetDir* pDir = NULL; - SortedVector<AssetDir::FileInfo>* pMergedInfo = NULL; - - LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager"); - assert(dirName != NULL); - - //printf("+++ openDir(%s) in '%s'\n", dirName, (const char*) mAssetBase); - - if (mCacheMode != CACHE_OFF && !mCacheValid) - loadFileNameCacheLocked(); - - pDir = new AssetDir; - - pMergedInfo = new SortedVector<AssetDir::FileInfo>; - - const size_t which = ((size_t)cookie)-1; - - if (which < mAssetPaths.size()) { - const asset_path& ap = mAssetPaths.itemAt(which); - if (ap.type == kFileTypeRegular) { - ALOGV("Adding directory %s from zip %s", dirName, ap.path.string()); - scanAndMergeZipLocked(pMergedInfo, ap, NULL, dirName); - } else { - ALOGV("Adding directory %s from dir %s", dirName, ap.path.string()); - scanAndMergeDirLocked(pMergedInfo, ap, NULL, dirName); - } - } - -#if 0 - printf("FILE LIST:\n"); - for (i = 0; i < (size_t) pMergedInfo->size(); i++) { - printf(" %d: (%d) '%s'\n", i, - pMergedInfo->itemAt(i).getFileType(), - (const char*) pMergedInfo->itemAt(i).getFileName()); - } -#endif - - pDir->setFileList(pMergedInfo); - return pDir; -} - -/* - * Scan the contents of the specified directory and merge them into the - * "pMergedInfo" vector, removing previous entries if we find "exclude" - * directives. - * - * Returns "false" if we found nothing to contribute. - */ -bool AssetManager::scanAndMergeDirLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, - const asset_path& ap, const char* rootDir, const char* dirName) -{ - SortedVector<AssetDir::FileInfo>* pContents; - String8 path; - - assert(pMergedInfo != NULL); - - //printf("scanAndMergeDir: %s %s %s %s\n", appName, locale, vendor,dirName); - - if (mCacheValid) { - int i, start, count; - - pContents = new SortedVector<AssetDir::FileInfo>; - - /* - * Get the basic partial path and find it in the cache. That's - * the start point for the search. - */ - path = createPathNameLocked(ap, rootDir); - if (dirName[0] != '\0') - path.appendPath(dirName); - - start = mCache.indexOf(path); - if (start == NAME_NOT_FOUND) { - //printf("+++ not found in cache: dir '%s'\n", (const char*) path); - delete pContents; - return false; - } - - /* - * The match string looks like "common/default/default/foo/bar/". - * The '/' on the end ensures that we don't match on the directory - * itself or on ".../foo/barfy/". - */ - path.append("/"); - - count = mCache.size(); - - /* - * Pick out the stuff in the current dir by examining the pathname. - * It needs to match the partial pathname prefix, and not have a '/' - * (fssep) anywhere after the prefix. - */ - for (i = start+1; i < count; i++) { - if (mCache[i].getFileName().length() > path.length() && - strncmp(mCache[i].getFileName().string(), path.string(), path.length()) == 0) - { - const char* name = mCache[i].getFileName().string(); - // XXX THIS IS BROKEN! Looks like we need to store the full - // path prefix separately from the file path. - if (strchr(name + path.length(), '/') == NULL) { - /* grab it, reducing path to just the filename component */ - AssetDir::FileInfo tmp = mCache[i]; - tmp.setFileName(tmp.getFileName().getPathLeaf()); - pContents->add(tmp); - } - } else { - /* no longer in the dir or its subdirs */ - break; - } - - } - } else { - path = createPathNameLocked(ap, rootDir); - if (dirName[0] != '\0') - path.appendPath(dirName); - pContents = scanDirLocked(path); - if (pContents == NULL) - return false; - } - - // if we wanted to do an incremental cache fill, we would do it here - - /* - * Process "exclude" directives. If we find a filename that ends with - * ".EXCLUDE", we look for a matching entry in the "merged" set, and - * remove it if we find it. We also delete the "exclude" entry. - */ - int i, count, exclExtLen; - - count = pContents->size(); - exclExtLen = strlen(kExcludeExtension); - for (i = 0; i < count; i++) { - const char* name; - int nameLen; - - name = pContents->itemAt(i).getFileName().string(); - nameLen = strlen(name); - if (nameLen > exclExtLen && - strcmp(name + (nameLen - exclExtLen), kExcludeExtension) == 0) - { - String8 match(name, nameLen - exclExtLen); - int matchIdx; - - matchIdx = AssetDir::FileInfo::findEntry(pMergedInfo, match); - if (matchIdx > 0) { - ALOGV("Excluding '%s' [%s]\n", - pMergedInfo->itemAt(matchIdx).getFileName().string(), - pMergedInfo->itemAt(matchIdx).getSourceName().string()); - pMergedInfo->removeAt(matchIdx); - } else { - //printf("+++ no match on '%s'\n", (const char*) match); - } - - ALOGD("HEY: size=%d removing %d\n", (int)pContents->size(), i); - pContents->removeAt(i); - i--; // adjust "for" loop - count--; // and loop limit - } - } - - mergeInfoLocked(pMergedInfo, pContents); - - delete pContents; - - return true; -} - -/* - * Scan the contents of the specified directory, and stuff what we find - * into a newly-allocated vector. - * - * Files ending in ".gz" will have their extensions removed. - * - * We should probably think about skipping files with "illegal" names, - * e.g. illegal characters (/\:) or excessive length. - * - * Returns NULL if the specified directory doesn't exist. - */ -SortedVector<AssetDir::FileInfo>* AssetManager::scanDirLocked(const String8& path) -{ - SortedVector<AssetDir::FileInfo>* pContents = NULL; - DIR* dir; - struct dirent* entry; - FileType fileType; - - ALOGV("Scanning dir '%s'\n", path.string()); - - dir = opendir(path.string()); - if (dir == NULL) - return NULL; - - pContents = new SortedVector<AssetDir::FileInfo>; - - while (1) { - entry = readdir(dir); - if (entry == NULL) - break; - - if (strcmp(entry->d_name, ".") == 0 || - strcmp(entry->d_name, "..") == 0) - continue; - -#ifdef _DIRENT_HAVE_D_TYPE - if (entry->d_type == DT_REG) - fileType = kFileTypeRegular; - else if (entry->d_type == DT_DIR) - fileType = kFileTypeDirectory; - else - fileType = kFileTypeUnknown; -#else - // stat the file - fileType = ::getFileType(path.appendPathCopy(entry->d_name).string()); -#endif - - if (fileType != kFileTypeRegular && fileType != kFileTypeDirectory) - continue; - - AssetDir::FileInfo info; - info.set(String8(entry->d_name), fileType); - if (strcasecmp(info.getFileName().getPathExtension().string(), ".gz") == 0) - info.setFileName(info.getFileName().getBasePath()); - info.setSourceName(path.appendPathCopy(info.getFileName())); - pContents->add(info); - } - - closedir(dir); - return pContents; -} - -/* - * Scan the contents out of the specified Zip archive, and merge what we - * find into "pMergedInfo". If the Zip archive in question doesn't exist, - * we return immediately. - * - * Returns "false" if we found nothing to contribute. - */ -bool AssetManager::scanAndMergeZipLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, - const asset_path& ap, const char* rootDir, const char* baseDirName) -{ - ZipFileRO* pZip; - Vector<String8> dirs; - AssetDir::FileInfo info; - SortedVector<AssetDir::FileInfo> contents; - String8 sourceName, zipName, dirName; - - pZip = mZipSet.getZip(ap.path); - if (pZip == NULL) { - ALOGW("Failure opening zip %s\n", ap.path.string()); - return false; - } - - zipName = ZipSet::getPathName(ap.path.string()); - - /* convert "sounds" to "rootDir/sounds" */ - if (rootDir != NULL) dirName = rootDir; - dirName.appendPath(baseDirName); - - /* - * Scan through the list of files, looking for a match. The files in - * the Zip table of contents are not in sorted order, so we have to - * process the entire list. We're looking for a string that begins - * with the characters in "dirName", is followed by a '/', and has no - * subsequent '/' in the stuff that follows. - * - * What makes this especially fun is that directories are not stored - * explicitly in Zip archives, so we have to infer them from context. - * When we see "sounds/foo.wav" we have to leave a note to ourselves - * to insert a directory called "sounds" into the list. We store - * these in temporary vector so that we only return each one once. - * - * Name comparisons are case-sensitive to match UNIX filesystem - * semantics. - */ - int dirNameLen = dirName.length(); - for (int i = 0; i < pZip->getNumEntries(); i++) { - ZipEntryRO entry; - char nameBuf[256]; - - entry = pZip->findEntryByIndex(i); - if (pZip->getEntryFileName(entry, nameBuf, sizeof(nameBuf)) != 0) { - // TODO: fix this if we expect to have long names - ALOGE("ARGH: name too long?\n"); - continue; - } - //printf("Comparing %s in %s?\n", nameBuf, dirName.string()); - if (dirNameLen == 0 || - (strncmp(nameBuf, dirName.string(), dirNameLen) == 0 && - nameBuf[dirNameLen] == '/')) - { - const char* cp; - const char* nextSlash; - - cp = nameBuf + dirNameLen; - if (dirNameLen != 0) - cp++; // advance past the '/' - - nextSlash = strchr(cp, '/'); -//xxx this may break if there are bare directory entries - if (nextSlash == NULL) { - /* this is a file in the requested directory */ - - info.set(String8(nameBuf).getPathLeaf(), kFileTypeRegular); - - info.setSourceName( - createZipSourceNameLocked(zipName, dirName, info.getFileName())); - - contents.add(info); - //printf("FOUND: file '%s'\n", info.getFileName().string()); - } else { - /* this is a subdir; add it if we don't already have it*/ - String8 subdirName(cp, nextSlash - cp); - size_t j; - size_t N = dirs.size(); - - for (j = 0; j < N; j++) { - if (subdirName == dirs[j]) { - break; - } - } - if (j == N) { - dirs.add(subdirName); - } - - //printf("FOUND: dir '%s'\n", subdirName.string()); - } - } - } - - /* - * Add the set of unique directories. - */ - for (int i = 0; i < (int) dirs.size(); i++) { - info.set(dirs[i], kFileTypeDirectory); - info.setSourceName( - createZipSourceNameLocked(zipName, dirName, info.getFileName())); - contents.add(info); - } - - mergeInfoLocked(pMergedInfo, &contents); - - return true; -} - - -/* - * Merge two vectors of FileInfo. - * - * The merged contents will be stuffed into *pMergedInfo. - * - * If an entry for a file exists in both "pMergedInfo" and "pContents", - * we use the newer "pContents" entry. - */ -void AssetManager::mergeInfoLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, - const SortedVector<AssetDir::FileInfo>* pContents) -{ - /* - * Merge what we found in this directory with what we found in - * other places. - * - * Two basic approaches: - * (1) Create a new array that holds the unique values of the two - * arrays. - * (2) Take the elements from pContents and shove them into pMergedInfo. - * - * Because these are vectors of complex objects, moving elements around - * inside the vector requires constructing new objects and allocating - * storage for members. With approach #1, we're always adding to the - * end, whereas with #2 we could be inserting multiple elements at the - * front of the vector. Approach #1 requires a full copy of the - * contents of pMergedInfo, but approach #2 requires the same copy for - * every insertion at the front of pMergedInfo. - * - * (We should probably use a SortedVector interface that allows us to - * just stuff items in, trusting us to maintain the sort order.) - */ - SortedVector<AssetDir::FileInfo>* pNewSorted; - int mergeMax, contMax; - int mergeIdx, contIdx; - - pNewSorted = new SortedVector<AssetDir::FileInfo>; - mergeMax = pMergedInfo->size(); - contMax = pContents->size(); - mergeIdx = contIdx = 0; - - while (mergeIdx < mergeMax || contIdx < contMax) { - if (mergeIdx == mergeMax) { - /* hit end of "merge" list, copy rest of "contents" */ - pNewSorted->add(pContents->itemAt(contIdx)); - contIdx++; - } else if (contIdx == contMax) { - /* hit end of "cont" list, copy rest of "merge" */ - pNewSorted->add(pMergedInfo->itemAt(mergeIdx)); - mergeIdx++; - } else if (pMergedInfo->itemAt(mergeIdx) == pContents->itemAt(contIdx)) - { - /* items are identical, add newer and advance both indices */ - pNewSorted->add(pContents->itemAt(contIdx)); - mergeIdx++; - contIdx++; - } else if (pMergedInfo->itemAt(mergeIdx) < pContents->itemAt(contIdx)) - { - /* "merge" is lower, add that one */ - pNewSorted->add(pMergedInfo->itemAt(mergeIdx)); - mergeIdx++; - } else { - /* "cont" is lower, add that one */ - assert(pContents->itemAt(contIdx) < pMergedInfo->itemAt(mergeIdx)); - pNewSorted->add(pContents->itemAt(contIdx)); - contIdx++; - } - } - - /* - * Overwrite the "merged" list with the new stuff. - */ - *pMergedInfo = *pNewSorted; - delete pNewSorted; - -#if 0 // for Vector, rather than SortedVector - int i, j; - for (i = pContents->size() -1; i >= 0; i--) { - bool add = true; - - for (j = pMergedInfo->size() -1; j >= 0; j--) { - /* case-sensitive comparisons, to behave like UNIX fs */ - if (strcmp(pContents->itemAt(i).mFileName, - pMergedInfo->itemAt(j).mFileName) == 0) - { - /* match, don't add this entry */ - add = false; - break; - } - } - - if (add) - pMergedInfo->add(pContents->itemAt(i)); - } -#endif -} - - -/* - * Load all files into the file name cache. We want to do this across - * all combinations of { appname, locale, vendor }, performing a recursive - * directory traversal. - * - * This is not the most efficient data structure. Also, gathering the - * information as we needed it (file-by-file or directory-by-directory) - * would be faster. However, on the actual device, 99% of the files will - * live in Zip archives, so this list will be very small. The trouble - * is that we have to check the "loose" files first, so it's important - * that we don't beat the filesystem silly looking for files that aren't - * there. - * - * Note on thread safety: this is the only function that causes updates - * to mCache, and anybody who tries to use it will call here if !mCacheValid, - * so we need to employ a mutex here. - */ -void AssetManager::loadFileNameCacheLocked(void) -{ - assert(!mCacheValid); - assert(mCache.size() == 0); - -#ifdef DO_TIMINGS // need to link against -lrt for this now - DurationTimer timer; - timer.start(); -#endif - - fncScanLocked(&mCache, ""); - -#ifdef DO_TIMINGS - timer.stop(); - ALOGD("Cache scan took %.3fms\n", - timer.durationUsecs() / 1000.0); -#endif - -#if 0 - int i; - printf("CACHED FILE LIST (%d entries):\n", mCache.size()); - for (i = 0; i < (int) mCache.size(); i++) { - printf(" %d: (%d) '%s'\n", i, - mCache.itemAt(i).getFileType(), - (const char*) mCache.itemAt(i).getFileName()); - } -#endif - - mCacheValid = true; -} - -/* - * Scan up to 8 versions of the specified directory. - */ -void AssetManager::fncScanLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo, - const char* dirName) -{ - size_t i = mAssetPaths.size(); - while (i > 0) { - i--; - const asset_path& ap = mAssetPaths.itemAt(i); - fncScanAndMergeDirLocked(pMergedInfo, ap, NULL, NULL, dirName); - if (mLocale != NULL) - fncScanAndMergeDirLocked(pMergedInfo, ap, mLocale, NULL, dirName); - if (mVendor != NULL) - fncScanAndMergeDirLocked(pMergedInfo, ap, NULL, mVendor, dirName); - if (mLocale != NULL && mVendor != NULL) - fncScanAndMergeDirLocked(pMergedInfo, ap, mLocale, mVendor, dirName); - } -} - -/* - * Recursively scan this directory and all subdirs. - * - * This is similar to scanAndMergeDir, but we don't remove the .EXCLUDE - * files, and we prepend the extended partial path to the filenames. - */ -bool AssetManager::fncScanAndMergeDirLocked( - SortedVector<AssetDir::FileInfo>* pMergedInfo, - const asset_path& ap, const char* locale, const char* vendor, - const char* dirName) -{ - SortedVector<AssetDir::FileInfo>* pContents; - String8 partialPath; - String8 fullPath; - - // XXX This is broken -- the filename cache needs to hold the base - // asset path separately from its filename. - - partialPath = createPathNameLocked(ap, locale, vendor); - if (dirName[0] != '\0') { - partialPath.appendPath(dirName); - } - - fullPath = partialPath; - pContents = scanDirLocked(fullPath); - if (pContents == NULL) { - return false; // directory did not exist - } - - /* - * Scan all subdirectories of the current dir, merging what we find - * into "pMergedInfo". - */ - for (int i = 0; i < (int) pContents->size(); i++) { - if (pContents->itemAt(i).getFileType() == kFileTypeDirectory) { - String8 subdir(dirName); - subdir.appendPath(pContents->itemAt(i).getFileName()); - - fncScanAndMergeDirLocked(pMergedInfo, ap, locale, vendor, subdir.string()); - } - } - - /* - * To be consistent, we want entries for the root directory. If - * we're the root, add one now. - */ - if (dirName[0] == '\0') { - AssetDir::FileInfo tmpInfo; - - tmpInfo.set(String8(""), kFileTypeDirectory); - tmpInfo.setSourceName(createPathNameLocked(ap, locale, vendor)); - pContents->add(tmpInfo); - } - - /* - * We want to prepend the extended partial path to every entry in - * "pContents". It's the same value for each entry, so this will - * not change the sorting order of the vector contents. - */ - for (int i = 0; i < (int) pContents->size(); i++) { - const AssetDir::FileInfo& info = pContents->itemAt(i); - pContents->editItemAt(i).setFileName(partialPath.appendPathCopy(info.getFileName())); - } - - mergeInfoLocked(pMergedInfo, pContents); - return true; -} - -/* - * Trash the cache. - */ -void AssetManager::purgeFileNameCacheLocked(void) -{ - mCacheValid = false; - mCache.clear(); -} - -/* - * =========================================================================== - * AssetManager::SharedZip - * =========================================================================== - */ - - -Mutex AssetManager::SharedZip::gLock; -DefaultKeyedVector<String8, wp<AssetManager::SharedZip> > AssetManager::SharedZip::gOpen; - -AssetManager::SharedZip::SharedZip(const String8& path, time_t modWhen) - : mPath(path), mZipFile(NULL), mModWhen(modWhen), - mResourceTableAsset(NULL), mResourceTable(NULL) -{ - //ALOGI("Creating SharedZip %p %s\n", this, (const char*)mPath); - mZipFile = new ZipFileRO; - ALOGV("+++ opening zip '%s'\n", mPath.string()); - if (mZipFile->open(mPath.string()) != NO_ERROR) { - ALOGD("failed to open Zip archive '%s'\n", mPath.string()); - delete mZipFile; - mZipFile = NULL; - } -} - -sp<AssetManager::SharedZip> AssetManager::SharedZip::get(const String8& path) -{ - AutoMutex _l(gLock); - time_t modWhen = getFileModDate(path); - sp<SharedZip> zip = gOpen.valueFor(path).promote(); - if (zip != NULL && zip->mModWhen == modWhen) { - return zip; - } - zip = new SharedZip(path, modWhen); - gOpen.add(path, zip); - return zip; - -} - -ZipFileRO* AssetManager::SharedZip::getZip() -{ - return mZipFile; -} - -Asset* AssetManager::SharedZip::getResourceTableAsset() -{ - ALOGV("Getting from SharedZip %p resource asset %p\n", this, mResourceTableAsset); - return mResourceTableAsset; -} - -Asset* AssetManager::SharedZip::setResourceTableAsset(Asset* asset) -{ - { - AutoMutex _l(gLock); - if (mResourceTableAsset == NULL) { - mResourceTableAsset = asset; - // This is not thread safe the first time it is called, so - // do it here with the global lock held. - asset->getBuffer(true); - return asset; - } - } - delete asset; - return mResourceTableAsset; -} - -ResTable* AssetManager::SharedZip::getResourceTable() -{ - ALOGV("Getting from SharedZip %p resource table %p\n", this, mResourceTable); - return mResourceTable; -} - -ResTable* AssetManager::SharedZip::setResourceTable(ResTable* res) -{ - { - AutoMutex _l(gLock); - if (mResourceTable == NULL) { - mResourceTable = res; - return res; - } - } - delete res; - return mResourceTable; -} - -bool AssetManager::SharedZip::isUpToDate() -{ - time_t modWhen = getFileModDate(mPath.string()); - return mModWhen == modWhen; -} - -AssetManager::SharedZip::~SharedZip() -{ - //ALOGI("Destroying SharedZip %p %s\n", this, (const char*)mPath); - if (mResourceTable != NULL) { - delete mResourceTable; - } - if (mResourceTableAsset != NULL) { - delete mResourceTableAsset; - } - if (mZipFile != NULL) { - delete mZipFile; - ALOGV("Closed '%s'\n", mPath.string()); - } -} - -/* - * =========================================================================== - * AssetManager::ZipSet - * =========================================================================== - */ - -/* - * Constructor. - */ -AssetManager::ZipSet::ZipSet(void) -{ -} - -/* - * Destructor. Close any open archives. - */ -AssetManager::ZipSet::~ZipSet(void) -{ - size_t N = mZipFile.size(); - for (size_t i = 0; i < N; i++) - closeZip(i); -} - -/* - * Close a Zip file and reset the entry. - */ -void AssetManager::ZipSet::closeZip(int idx) -{ - mZipFile.editItemAt(idx) = NULL; -} - - -/* - * Retrieve the appropriate Zip file from the set. - */ -ZipFileRO* AssetManager::ZipSet::getZip(const String8& path) -{ - int idx = getIndex(path); - sp<SharedZip> zip = mZipFile[idx]; - if (zip == NULL) { - zip = SharedZip::get(path); - mZipFile.editItemAt(idx) = zip; - } - return zip->getZip(); -} - -Asset* AssetManager::ZipSet::getZipResourceTableAsset(const String8& path) -{ - int idx = getIndex(path); - sp<SharedZip> zip = mZipFile[idx]; - if (zip == NULL) { - zip = SharedZip::get(path); - mZipFile.editItemAt(idx) = zip; - } - return zip->getResourceTableAsset(); -} - -Asset* AssetManager::ZipSet::setZipResourceTableAsset(const String8& path, - Asset* asset) -{ - int idx = getIndex(path); - sp<SharedZip> zip = mZipFile[idx]; - // doesn't make sense to call before previously accessing. - return zip->setResourceTableAsset(asset); -} - -ResTable* AssetManager::ZipSet::getZipResourceTable(const String8& path) -{ - int idx = getIndex(path); - sp<SharedZip> zip = mZipFile[idx]; - if (zip == NULL) { - zip = SharedZip::get(path); - mZipFile.editItemAt(idx) = zip; - } - return zip->getResourceTable(); -} - -ResTable* AssetManager::ZipSet::setZipResourceTable(const String8& path, - ResTable* res) -{ - int idx = getIndex(path); - sp<SharedZip> zip = mZipFile[idx]; - // doesn't make sense to call before previously accessing. - return zip->setResourceTable(res); -} - -/* - * Generate the partial pathname for the specified archive. The caller - * gets to prepend the asset root directory. - * - * Returns something like "common/en-US-noogle.jar". - */ -/*static*/ String8 AssetManager::ZipSet::getPathName(const char* zipPath) -{ - return String8(zipPath); -} - -bool AssetManager::ZipSet::isUpToDate() -{ - const size_t N = mZipFile.size(); - for (size_t i=0; i<N; i++) { - if (mZipFile[i] != NULL && !mZipFile[i]->isUpToDate()) { - return false; - } - } - return true; -} - -/* - * Compute the zip file's index. - * - * "appName", "locale", and "vendor" should be set to NULL to indicate the - * default directory. - */ -int AssetManager::ZipSet::getIndex(const String8& zip) const -{ - const size_t N = mZipPath.size(); - for (size_t i=0; i<N; i++) { - if (mZipPath[i] == zip) { - return i; - } - } - - mZipPath.add(zip); - mZipFile.add(NULL); - - return mZipPath.size()-1; -} |