auto import from //depot/cupcake/@135843
diff --git a/include/utils/AssetManager.h b/include/utils/AssetManager.h
new file mode 100644
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--- /dev/null
+++ b/include/utils/AssetManager.h
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+/*
+ * 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.
+ */
+
+//
+// Asset management class. AssetManager objects are thread-safe.
+//
+#ifndef __LIBS_ASSETMANAGER_H
+#define __LIBS_ASSETMANAGER_H
+
+#include <utils/Asset.h>
+#include <utils/AssetDir.h>
+#include <utils/KeyedVector.h>
+#include <utils/String8.h>
+#include <utils/Vector.h>
+#include <utils/String16.h>
+#include <utils/ZipFileRO.h>
+#include <utils/threads.h>
+
+namespace android {
+
+class Asset; // fwd decl for things that include Asset.h first
+class ResTable;
+struct ResTable_config;
+
+/*
+ * Every application that uses assets needs one instance of this. A
+ * single instance may be shared across multiple threads, and a single
+ * thread may have more than one instance (the latter is discouraged).
+ *
+ * The purpose of the AssetManager is to create Asset objects. To do
+ * this efficiently it may cache information about the locations of
+ * files it has seen. This can be controlled with the "cacheMode"
+ * argument.
+ *
+ * The asset hierarchy may be examined like a filesystem, using
+ * AssetDir objects to peruse a single directory.
+ */
+class AssetManager {
+public:
+ typedef enum CacheMode {
+ CACHE_UNKNOWN = 0,
+ CACHE_OFF, // don't try to cache file locations
+ CACHE_DEFER, // construct cache as pieces are needed
+ //CACHE_SCAN, // scan full(!) asset hierarchy at init() time
+ } CacheMode;
+
+ AssetManager(CacheMode cacheMode = CACHE_OFF);
+ virtual ~AssetManager(void);
+
+ static int32_t getGlobalCount();
+
+ /*
+ * Add a new source for assets. This can be called multiple times to
+ * look in multiple places for assets. It can be either a directory (for
+ * finding assets as raw files on the disk) or a ZIP file. This newly
+ * added asset path will be examined first when searching for assets,
+ * before any that were previously added.
+ *
+ * Returns "true" on success, "false" on failure. If 'cookie' is non-NULL,
+ * then on success, *cookie is set to the value corresponding to the
+ * newly-added asset source.
+ */
+ bool addAssetPath(const String8& path, void** cookie);
+
+ /*
+ * Convenience for adding the standard system assets. Uses the
+ * ANDROID_ROOT environment variable to find them.
+ */
+ bool addDefaultAssets();
+
+ /*
+ * Iterate over the asset paths in this manager. (Previously
+ * added via addAssetPath() and addDefaultAssets().) On first call,
+ * 'cookie' must be NULL, resulting in the first cookie being returned.
+ * Each next cookie will be returned there-after, until NULL indicating
+ * the end has been reached.
+ */
+ void* nextAssetPath(void* cookie) const;
+
+ /*
+ * Return an asset path in the manager. 'which' must be between 0 and
+ * countAssetPaths().
+ */
+ String8 getAssetPath(void* cookie) const;
+
+ /*
+ * Set the current locale and vendor. The locale can change during
+ * the lifetime of an AssetManager if the user updates the device's
+ * language setting. The vendor is less likely to change.
+ *
+ * Pass in NULL to indicate no preference.
+ */
+ void setLocale(const char* locale);
+ void setVendor(const char* vendor);
+
+ /*
+ * Choose screen orientation for resources values returned.
+ */
+ void setConfiguration(const ResTable_config& config, const char* locale = NULL);
+
+ typedef Asset::AccessMode AccessMode; // typing shortcut
+
+ /*
+ * Open an asset.
+ *
+ * This will search through locale-specific and vendor-specific
+ * directories and packages to find the file.
+ *
+ * The object returned does not depend on the AssetManager. It should
+ * be freed by calling Asset::close().
+ */
+ Asset* open(const char* fileName, AccessMode mode);
+
+ /*
+ * Open a non-asset file as an asset.
+ *
+ * This is for opening files that are included in an asset package
+ * but aren't assets. These sit outside the usual "locale/vendor"
+ * path hierarchy, and will not be seen by "AssetDir" or included
+ * in our filename cache.
+ */
+ Asset* openNonAsset(const char* fileName, AccessMode mode);
+
+ /*
+ * Explicit non-asset file. The file explicitly named by the cookie (the
+ * resource set to look in) and fileName will be opened and returned.
+ */
+ Asset* openNonAsset(void* cookie, const char* fileName, AccessMode mode);
+
+ /*
+ * Open a directory within the asset hierarchy.
+ *
+ * The contents of the directory are an amalgam of vendor-specific,
+ * locale-specific, and generic assets stored loosely or in asset
+ * packages. Depending on the cache setting and previous accesses,
+ * this call may incur significant disk overhead.
+ *
+ * To open the top-level directory, pass in "".
+ */
+ AssetDir* openDir(const char* dirName);
+
+ /*
+ * Get the type of a file in the asset hierarchy. They will either
+ * be "regular" or "directory". [Currently only works for "regular".]
+ *
+ * Can also be used as a quick test for existence of a file.
+ */
+ FileType getFileType(const char* fileName);
+
+ /*
+ * Return the complete resource table to find things in the package.
+ */
+ const ResTable& getResources(bool required = true) const;
+
+ /*
+ * Discard cached filename information. This only needs to be called
+ * if somebody has updated the set of "loose" files, and we want to
+ * discard our cached notion of what's where.
+ */
+ void purge(void) { purgeFileNameCacheLocked(); }
+
+ /*
+ * Return true if the files this AssetManager references are all
+ * up-to-date (have not been changed since it was created). If false
+ * is returned, you will need to create a new AssetManager to get
+ * the current data.
+ */
+ bool isUpToDate();
+
+ /**
+ * Get the known locales for this asset manager object.
+ */
+ void getLocales(Vector<String8>* locales) const;
+
+private:
+ struct asset_path
+ {
+ String8 path;
+ FileType type;
+ };
+
+ Asset* openInPathLocked(const char* fileName, AccessMode mode,
+ const asset_path& path);
+ Asset* openNonAssetInPathLocked(const char* fileName, AccessMode mode,
+ const asset_path& path);
+ Asset* openInLocaleVendorLocked(const char* fileName, AccessMode mode,
+ const asset_path& path, const char* locale, const char* vendor);
+ String8 createPathNameLocked(const asset_path& path, const char* locale,
+ const char* vendor);
+ String8 createPathNameLocked(const asset_path& path, const char* rootDir);
+ String8 createZipSourceNameLocked(const String8& zipFileName,
+ const String8& dirName, const String8& fileName);
+
+ ZipFileRO* getZipFileLocked(const asset_path& path);
+ Asset* openAssetFromFileLocked(const String8& fileName, AccessMode mode);
+ Asset* openAssetFromZipLocked(const ZipFileRO* pZipFile,
+ const ZipEntryRO entry, AccessMode mode, const String8& entryName);
+
+ bool scanAndMergeDirLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo,
+ const asset_path& path, const char* rootDir, const char* dirName);
+ SortedVector<AssetDir::FileInfo>* scanDirLocked(const String8& path);
+ bool scanAndMergeZipLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo,
+ const asset_path& path, const char* rootDir, const char* dirName);
+ void mergeInfoLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo,
+ const SortedVector<AssetDir::FileInfo>* pContents);
+
+ void loadFileNameCacheLocked(void);
+ void fncScanLocked(SortedVector<AssetDir::FileInfo>* pMergedInfo,
+ const char* dirName);
+ bool fncScanAndMergeDirLocked(
+ SortedVector<AssetDir::FileInfo>* pMergedInfo,
+ const asset_path& path, const char* locale, const char* vendor,
+ const char* dirName);
+ void purgeFileNameCacheLocked(void);
+
+ const ResTable* getResTable(bool required = true) const;
+ void setLocaleLocked(const char* locale);
+ void updateResourceParamsLocked() const;
+
+ class SharedZip : public RefBase {
+ public:
+ static sp<SharedZip> get(const String8& path);
+
+ ZipFileRO* getZip();
+
+ Asset* getResourceTableAsset();
+ Asset* setResourceTableAsset(Asset* asset);
+
+ bool isUpToDate();
+
+ protected:
+ ~SharedZip();
+
+ private:
+ SharedZip(const String8& path, time_t modWhen);
+ SharedZip(); // <-- not implemented
+
+ String8 mPath;
+ ZipFileRO* mZipFile;
+ time_t mModWhen;
+
+ Asset* mResourceTableAsset;
+
+ static Mutex gLock;
+ static DefaultKeyedVector<String8, wp<SharedZip> > gOpen;
+ };
+
+ /*
+ * Manage a set of Zip files. For each file we need a pointer to the
+ * ZipFile and a time_t with the file's modification date.
+ *
+ * We currently only have two zip files (current app, "common" app).
+ * (This was originally written for 8, based on app/locale/vendor.)
+ */
+ class ZipSet {
+ public:
+ ZipSet(void);
+ ~ZipSet(void);
+
+ /*
+ * Return a ZipFileRO structure for a ZipFileRO with the specified
+ * parameters.
+ */
+ ZipFileRO* getZip(const String8& path);
+
+ Asset* getZipResourceTable(const String8& path);
+ Asset* setZipResourceTable(const String8& path, Asset* asset);
+
+ // generate path, e.g. "common/en-US-noogle.zip"
+ static String8 getPathName(const char* path);
+
+ bool isUpToDate();
+
+ private:
+ void closeZip(int idx);
+
+ int getIndex(const String8& zip) const;
+ mutable Vector<String8> mZipPath;
+ mutable Vector<sp<SharedZip> > mZipFile;
+ };
+
+ // Protect all internal state.
+ mutable Mutex mLock;
+
+ ZipSet mZipSet;
+
+ Vector<asset_path> mAssetPaths;
+ char* mLocale;
+ char* mVendor;
+
+ mutable ResTable* mResources;
+ ResTable_config* mConfig;
+
+ /*
+ * Cached data for "loose" files. This lets us avoid poking at the
+ * filesystem when searching for loose assets. Each entry is the
+ * "extended partial" path, e.g. "default/default/foo/bar.txt". The
+ * full set of files is present, including ".EXCLUDE" entries.
+ *
+ * We do not cache directory names. We don't retain the ".gz",
+ * because to our clients "foo" and "foo.gz" both look like "foo".
+ */
+ CacheMode mCacheMode; // is the cache enabled?
+ bool mCacheValid; // clear when locale or vendor changes
+ SortedVector<AssetDir::FileInfo> mCache;
+};
+
+}; // namespace android
+
+#endif // __LIBS_ASSETMANAGER_H