C++ String8::getPathExtension方法代码示例

/*
 * Determine whether or not we want to try to compress this file based
 * on the file extension.
 */
bool okayToCompress(Bundle* bundle, const String8& pathName)
{
    String8 ext = pathName.getPathExtension();
    int i;

    if (ext.length() == 0)
        return true;

    for (i = 0; i < NELEM(kNoCompressExt); i++) {
        if (strcasecmp(ext.string(), kNoCompressExt[i]) == 0)
            return false;
    }

    const android::Vector<const char*>& others(bundle->getNoCompressExtensions());
    for (i = 0; i < (int)others.size(); i++) {
        const char* str = others[i];
        int pos = pathName.length() - strlen(str);
        if (pos < 0) {
            continue;
        }
        const char* path = pathName.string();
        if (strcasecmp(path + pos, str) == 0) {
            return false;
        }
    }

    return true;
}

/*
 * Process a regular file, adding it to the archive if appropriate.
 *
 * This function is intended for use when creating a cached overlay package.
 * Only xml and .9.png files are processed and added to the package.
 *
 * If we're in "update" mode, and the file already exists in the archive,
 * delete the existing entry before adding the new one.
 */
bool processOverlayFile(Bundle* bundle, ZipFile* zip,
                            String8 storageName, const sp<const AaptFile>& file)
{
    const bool hasData = file->hasData();

    storageName.convertToResPath();
    ZipEntry* entry;
    bool fromGzip = false;
    status_t result;

    if (strcasecmp(storageName.getPathExtension().string(), ".gz") == 0) {
        fromGzip = true;
        storageName = storageName.getBasePath();
    }

    if (bundle->getUpdate()) {
        entry = zip->getEntryByName(storageName.string());
        if (entry != NULL) {
            /* file already exists in archive; there can be only one */
            if (entry->getMarked()) {
                fprintf(stderr,
                        "ERROR: '%s' exists twice (check for with & w/o '.gz'?)\n",
                        file->getPrintableSource().string());
                return false;
            }
            zip->remove(entry);
        }
    }

    if (hasData) {
        const char* name = storageName.string();
        if (endsWith(name, ".9.png") || endsWith(name, ".xml") || endsWith(name, ".arsc")) {
            result = zip->add(file->getData(), file->getSize(), storageName.string(),
                               file->getCompressionMethod(), &entry);
            if (result == NO_ERROR) {
                if (bundle->getVerbose()) {
                    printf("      '%s'%s", storageName.string(), fromGzip ? " (from .gz)" : "");
                    if (entry->getCompressionMethod() == ZipEntry::kCompressStored) {
                        printf(" (not compressed)\n");
                    } else {
                        printf(" (compressed %d%%)\n", calcPercent(entry->getUncompressedLen(),
                                    entry->getCompressedLen()));
                    }
                }
                entry->setMarked(true);
            } else {
                if (result == ALREADY_EXISTS) {
                    fprintf(stderr, "      Unable to add '%s': file already in archive (try '-u'?)\n",
                            file->getPrintableSource().string());
                } else {
                    fprintf(stderr, "      Unable to add '%s': Zip add failed\n",
                            file->getPrintableSource().string());
                }
                return false;
            }
        }
    }

    return true;
}

/*
 * Search the plugins directory for a plugin that supports the scheme
 * specified by uuid
 *
 * If found:
 *    mLibrary holds a strong pointer to the dlopen'd library
 *    mFactory is set to the library's factory method
 *    mInitCheck is set to OK
 *
 * If not found:
 *    mLibrary is cleared and mFactory are set to NULL
 *    mInitCheck is set to an error (!OK)
 */
void Crypto::findFactoryForScheme(const uint8_t uuid[16]) {

    closeFactory();

    // lock static maps
    Mutex::Autolock autoLock(mMapLock);

    // first check cache
    Vector<uint8_t> uuidVector;
    uuidVector.appendArray(uuid, sizeof(uuid));
    ssize_t index = mUUIDToLibraryPathMap.indexOfKey(uuidVector);
    if (index >= 0) {
        if (loadLibraryForScheme(mUUIDToLibraryPathMap[index], uuid)) {
            mInitCheck = OK;
            return;
        } else {
            ALOGE("Failed to load from cached library path!");
            mInitCheck = ERROR_UNSUPPORTED;
            return;
        }
    }

    // no luck, have to search
    String8 dirPath("/vendor/lib/mediadrm");
    String8 pluginPath;

    DIR* pDir = opendir(dirPath.string());
    if (pDir) {
        struct dirent* pEntry;
        while ((pEntry = readdir(pDir))) {

            pluginPath = dirPath + "/" + pEntry->d_name;

            if (pluginPath.getPathExtension() == ".so") {

                if (loadLibraryForScheme(pluginPath, uuid)) {
                    mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
                    mInitCheck = OK;
                    closedir(pDir);
                    return;
                }
            }
        }

        closedir(pDir);
    }

    // try the legacy libdrmdecrypt.so
    pluginPath = "libdrmdecrypt.so";
    if (loadLibraryForScheme(pluginPath, uuid)) {
        mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
        mInitCheck = OK;
        return;
    }

    mInitCheck = ERROR_UNSUPPORTED;
}

bool DrmManager::canHandle(int uniqueId, const String8& path, const String8& mimeType) {
    Mutex::Autolock _l(mLock);
    const String8 plugInId = getSupportedPlugInId(mimeType);
    bool result = (EMPTY_STRING != plugInId) ? true : false;

    if (0 < path.length()) {
        if (result) {
            IDrmEngine& rDrmEngine = mPlugInManager.getPlugIn(plugInId);
            result = rDrmEngine.canHandle(uniqueId, path);
        } else {
            String8 extension = path.getPathExtension();
            if (String8("") != extension) {
                result = canHandle(uniqueId, path);
            }
        }
    }
    return result;
}

String8 DrmManager::getSupportedPlugInIdFromPath(int uniqueId, const String8& path) {
    String8 plugInId("");
    const String8 fileSuffix = path.getPathExtension();

    for (unsigned int index = 0; index < mSupportInfoToPlugInIdMap.size(); index++) {
        const DrmSupportInfo& drmSupportInfo = mSupportInfoToPlugInIdMap.keyAt(index);

        if (drmSupportInfo.isSupportedFileSuffix(fileSuffix)) {
            String8 key = mSupportInfoToPlugInIdMap.valueFor(drmSupportInfo);
            IDrmEngine& drmEngine = mPlugInManager.getPlugIn(key);

            if (drmEngine.canHandle(uniqueId, path)) {
                plugInId = key;
                break;
            }
        }
    }
    return plugInId;
}

/*
 * Process a regular file, adding it to the archive if appropriate.
 *
 * If we're in "update" mode, and the file already exists in the archive,
 * delete the existing entry before adding the new one.
 */
bool processFile(Bundle* bundle, ZipFile* zip,
                 String8 storageName, const sp<const AaptFile>& file)
{
    const bool hasData = file->hasData();

    ZipEntry* entry;
    bool fromGzip = false;
    status_t result;

    /*
     * See if the filename ends in ".EXCLUDE".  We can't use
     * String8::getPathExtension() because the length of what it considers
     * to be an extension is capped.
     *
     * The Asset Manager doesn't check for ".EXCLUDE" in Zip archives,
     * so there's no value in adding them (and it makes life easier on
     * the AssetManager lib if we don't).
     *
     * NOTE: this restriction has been removed.  If you're in this code, you
     * should clean this up, but I'm in here getting rid of Path Name, and I
     * don't want to make other potentially breaking changes --joeo
     */
    int fileNameLen = storageName.length();
    int excludeExtensionLen = strlen(kExcludeExtension);
    if (fileNameLen > excludeExtensionLen
            && (0 == strcmp(storageName.string() + (fileNameLen - excludeExtensionLen),
                            kExcludeExtension))) {
        fprintf(stderr, "warning: '%s' not added to Zip\n", storageName.string());
        return true;
    }

    if (strcasecmp(storageName.getPathExtension().string(), ".gz") == 0) {
        fromGzip = true;
        storageName = storageName.getBasePath();
    }

    if (bundle->getUpdate()) {
        entry = zip->getEntryByName(storageName.string());
        if (entry != NULL) {
            /* file already exists in archive; there can be only one */
            if (entry->getMarked()) {
                fprintf(stderr,
                        "ERROR: '%s' exists twice (check for with & w/o '.gz'?)\n",
                        file->getPrintableSource().string());
                return false;
            }
            if (!hasData) {
                const String8& srcName = file->getSourceFile();
                time_t fileModWhen;
                fileModWhen = getFileModDate(srcName.string());
                if (fileModWhen == (time_t) -1) { // file existence tested earlier,
                    return false;                 //  not expecting an error here
                }
    
                if (fileModWhen > entry->getModWhen()) {
                    // mark as deleted so add() will succeed
                    if (bundle->getVerbose()) {
                        printf("      (removing old '%s')\n", storageName.string());
                    }
    
                    zip->remove(entry);
                } else {
                    // version in archive is newer
                    if (bundle->getVerbose()) {
                        printf("      (not updating '%s')\n", storageName.string());
                    }
                    entry->setMarked(true);
                    return true;
                }
            } else {
                // Generated files are always replaced.
                zip->remove(entry);
            }
        }
    }

    //android_setMinPriority(NULL, ANDROID_LOG_VERBOSE);

    if (fromGzip) {
        result = zip->addGzip(file->getSourceFile().string(), storageName.string(), &entry);
    } else if (!hasData) {
        /* don't compress certain files, e.g. PNGs */
        int compressionMethod = bundle->getCompressionMethod();
        if (!okayToCompress(bundle, storageName)) {
            compressionMethod = ZipEntry::kCompressStored;
        }
        result = zip->add(file->getSourceFile().string(), storageName.string(), compressionMethod,
                            &entry);
    } else {
        result = zip->add(file->getData(), file->getSize(), storageName.string(),
                           file->getCompressionMethod(), &entry);
    }
    if (result == NO_ERROR) {
        if (bundle->getVerbose()) {
//.........这里部分代码省略.........

bool FwdLockEngine::onCanHandle(int /* uniqueId */, const String8& path) {
    bool result = false;

    String8 extString = path.getPathExtension();
    return IsFileSuffixSupported(extString);
}

bool DrmPassthruPlugIn::onCanHandle(int uniqueId, const String8& path) {
    ALOGV("DrmPassthruPlugIn::canHandle: %s ", path.string());
    String8 extension = path.getPathExtension();
    extension.toLower();
    return (String8(".passthru") == extension);
}