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LeafOS / LeafOS-Project / android_frameworks_base / 8102ea5f9c03f2ae1ea8b316764be94d1f43613b / . / libs / androidfw / AssetManager.cpp
blob: 68befffecf2ffb9d432f387912fd14362815e5d2 [file] [log] [blame]
/*
* 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 ATRACE_TAG ATRACE_TAG_RESOURCES
//#define LOG_NDEBUG 0
#include <androidfw/Asset.h>
#include <androidfw/AssetDir.h>
#include <androidfw/AssetManager.h>
#include <androidfw/misc.h>
#include <androidfw/PathUtils.h>
#include <androidfw/ResourceTypes.h>
#include <androidfw/ZipFileRO.h>
#include <cutils/atomic.h>
#include <utils/Log.h>
#include <utils/String8.h>
#include <utils/String8.h>
#include <utils/threads.h>
#include <utils/Timers.h>
#include <utils/Trace.h>
#ifndef _WIN32
#include <sys/file.h>
#endif
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <string.h> // strerror
#include <strings.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;
static const bool kIsDebug = false;
static const char* kAssetsRoot = "assets";
static const char* kAppZipName = NULL; //"classes.jar";
static const char* kSystemAssets = "framework/framework-res.apk";
static const char* kResourceCache = "resource-cache";
static const char* kExcludeExtension = ".EXCLUDE";
static Asset* const kExcludedAsset = (Asset*) 0xd000000d;
static volatile int32_t gCount = 0;
const char* AssetManager::RESOURCES_FILENAME = "resources.arsc";
const char* AssetManager::IDMAP_BIN = "/system/bin/idmap";
const char* AssetManager::VENDOR_OVERLAY_DIR = "/vendor/overlay";
const char* AssetManager::PRODUCT_OVERLAY_DIR = "/product/overlay";
const char* AssetManager::SYSTEM_EXT_OVERLAY_DIR = "/system_ext/overlay";
const char* AssetManager::ODM_OVERLAY_DIR = "/odm/overlay";
const char* AssetManager::OEM_OVERLAY_DIR = "/oem/overlay";
const char* AssetManager::OVERLAY_THEME_DIR_PROPERTY = "ro.boot.vendor.overlay.theme";
const char* AssetManager::TARGET_PACKAGE_NAME = "android";
const char* AssetManager::TARGET_APK_PATH = "/system/framework/framework-res.apk";
const char* AssetManager::IDMAP_DIR = "/data/resource-cache";
namespace {
String8 idmapPathForPackagePath(const String8& pkgPath) {
const char* root = getenv("ANDROID_DATA");
LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_DATA not set");
String8 path(root);
appendPath(path, kResourceCache);
char buf[256]; // 256 chars should be enough for anyone...
strncpy(buf, pkgPath.c_str(), 255);
buf[255] = '\0';
char* filename = buf;
while (*filename && *filename == '/') {
++filename;
}
char* p = filename;
while (*p) {
if (*p == '/') {
*p = '@';
}
++p;
}
appendPath(path, filename);
path.append("@idmap");
return path;
}
/*
* Like strdup(), but uses C++ "new" operator instead of malloc.
*/
static char* strdupNew(const char* str) {
char* newStr;
int len;
if (str == NULL)
return NULL;
len = strlen(str);
newStr = new char[len+1];
memcpy(newStr, str, len+1);
return newStr;
}
} // namespace
/*
* ===========================================================================
* AssetManager
* ===========================================================================
*/
int32_t AssetManager::getGlobalCount() {
return gCount;
}
AssetManager::AssetManager() :
mLocale(NULL), mResources(NULL), mConfig(new ResTable_config) {
int count = android_atomic_inc(&gCount) + 1;
if (kIsDebug) {
ALOGI("Creating AssetManager %p #%d\n", this, count);
}
memset(mConfig, 0, sizeof(ResTable_config));
}
AssetManager::~AssetManager() {
int count = android_atomic_dec(&gCount);
if (kIsDebug) {
ALOGI("Destroying AssetManager in %p #%d\n", this, count);
} else {
ALOGV("Destroying AssetManager in %p #%d\n", this, count);
}
// Manually close any fd paths for which we have not yet opened their zip (which
// will take ownership of the fd and close it when done).
for (size_t i=0; i<mAssetPaths.size(); i++) {
ALOGV("Cleaning path #%d: fd=%d, zip=%p", (int)i, mAssetPaths[i].rawFd,
mAssetPaths[i].zip.get());
if (mAssetPaths[i].rawFd >= 0 && mAssetPaths[i].zip == NULL) {
close(mAssetPaths[i].rawFd);
}
}
delete mConfig;
delete mResources;
// don't have a String class yet, so make sure we clean up
delete[] mLocale;
}
bool AssetManager::addAssetPath(
const String8& path, int32_t* cookie, bool appAsLib, bool isSystemAsset) {
AutoMutex _l(mLock);
asset_path ap;
String8 realPath(path);
if (kAppZipName) {
appendPath(realPath, kAppZipName);
}
ap.type = ::getFileType(realPath.c_str());
if (ap.type == kFileTypeRegular) {
ap.path = realPath;
} else {
ap.path = path;
ap.type = ::getFileType(path.c_str());
if (ap.type != kFileTypeDirectory && ap.type != kFileTypeRegular) {
ALOGW("Asset path %s is neither a directory nor file (type=%d).",
path.c_str(), (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 = static_cast<int32_t>(i+1);
}
return true;
}
}
ALOGV("In %p Asset %s path: %s", this,
ap.type == kFileTypeDirectory ? "dir" : "zip", ap.path.c_str());
ap.isSystemAsset = isSystemAsset;
ssize_t apPos = mAssetPaths.add(ap);
// new paths are always added at the end
if (cookie) {
*cookie = static_cast<int32_t>(mAssetPaths.size());
}
#ifdef __ANDROID__
// Load overlays, if any
asset_path oap;
for (size_t idx = 0; mZipSet.getOverlay(ap.path, idx, &oap); idx++) {
oap.isSystemAsset = isSystemAsset;
mAssetPaths.add(oap);
}
#endif
if (mResources != NULL) {
appendPathToResTable(mAssetPaths.editItemAt(apPos), appAsLib);
}
return true;
}
bool AssetManager::addOverlayPath(const String8& packagePath, int32_t* cookie)
{
const String8 idmapPath = idmapPathForPackagePath(packagePath);
AutoMutex _l(mLock);
for (size_t i = 0; i < mAssetPaths.size(); ++i) {
if (mAssetPaths[i].idmap == idmapPath) {
*cookie = static_cast<int32_t>(i + 1);
return true;
}
}
Asset* idmap = NULL;
if ((idmap = openAssetFromFileLocked(idmapPath, Asset::ACCESS_BUFFER)) == NULL) {
ALOGW("failed to open idmap file %s\n", idmapPath.c_str());
return false;
}
String8 targetPath;
String8 overlayPath;
if (!ResTable::getIdmapInfo(idmap->getBuffer(false), idmap->getLength(),
NULL, NULL, NULL, &targetPath, &overlayPath)) {
ALOGW("failed to read idmap file %s\n", idmapPath.c_str());
delete idmap;
return false;
}
delete idmap;
if (overlayPath != packagePath) {
ALOGW("idmap file %s inconcistent: expected path %s does not match actual path %s\n",
idmapPath.c_str(), packagePath.c_str(), overlayPath.c_str());
return false;
}
if (access(targetPath.c_str(), R_OK) != 0) {
ALOGW("failed to access file %s: %s\n", targetPath.c_str(), strerror(errno));
return false;
}
if (access(idmapPath.c_str(), R_OK) != 0) {
ALOGW("failed to access file %s: %s\n", idmapPath.c_str(), strerror(errno));
return false;
}
if (access(overlayPath.c_str(), R_OK) != 0) {
ALOGW("failed to access file %s: %s\n", overlayPath.c_str(), strerror(errno));
return false;
}
asset_path oap;
oap.path = overlayPath;
oap.type = ::getFileType(overlayPath.c_str());
oap.idmap = idmapPath;
#if 0
ALOGD("Overlay added: targetPath=%s overlayPath=%s idmapPath=%s\n",
targetPath.c_str(), overlayPath.c_str(), idmapPath.c_str());
#endif
mAssetPaths.add(oap);
*cookie = static_cast<int32_t>(mAssetPaths.size());
if (mResources != NULL) {
appendPathToResTable(oap);
}
return true;
}
bool AssetManager::addAssetFd(
int fd, const String8& debugPathName, int32_t* cookie, bool appAsLib,
bool assume_ownership) {
AutoMutex _l(mLock);
asset_path ap;
ap.path = debugPathName;
ap.rawFd = fd;
ap.type = kFileTypeRegular;
ap.assumeOwnership = assume_ownership;
ALOGV("In %p Asset fd %d name: %s", this, fd, ap.path.c_str());
ssize_t apPos = mAssetPaths.add(ap);
// new paths are always added at the end
if (cookie) {
*cookie = static_cast<int32_t>(mAssetPaths.size());
}
if (mResources != NULL) {
appendPathToResTable(mAssetPaths.editItemAt(apPos), appAsLib);
}
return true;
}
bool AssetManager::createIdmap(const char* targetApkPath, const char* overlayApkPath,
uint32_t targetCrc, uint32_t overlayCrc, uint32_t** outData, size_t* outSize)
{
AutoMutex _l(mLock);
const String8 paths[2] = { String8(targetApkPath), String8(overlayApkPath) };
Asset* assets[2] = {NULL, NULL};
bool ret = false;
{
ResTable tables[2];
for (int i = 0; i < 2; ++i) {
asset_path ap;
ap.type = kFileTypeRegular;
ap.path = paths[i];
assets[i] = openNonAssetInPathLocked("resources.arsc",
Asset::ACCESS_BUFFER, ap);
if (assets[i] == NULL) {
ALOGW("failed to find resources.arsc in %s\n", ap.path.c_str());
goto exit;
}
if (tables[i].add(assets[i]) != NO_ERROR) {
ALOGW("failed to add %s to resource table", paths[i].c_str());
goto exit;
}
}
ret = tables[1].createIdmap(tables[0], targetCrc, overlayCrc,
targetApkPath, overlayApkPath, (void**)outData, outSize) == NO_ERROR;
}
exit:
delete assets[0];
delete assets[1];
return ret;
}
bool AssetManager::addDefaultAssets()
{
const char* root = getenv("ANDROID_ROOT");
LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_ROOT not set");
String8 path(root);
appendPath(path, kSystemAssets);
return addAssetPath(path, NULL, false /* appAsLib */, true /* isSystemAsset */);
}
int32_t AssetManager::nextAssetPath(const int32_t cookie) const
{
AutoMutex _l(mLock);
const size_t next = static_cast<size_t>(cookie) + 1;
return next > mAssetPaths.size() ? -1 : next;
}
String8 AssetManager::getAssetPath(const int32_t cookie) const
{
AutoMutex _l(mLock);
const size_t which = static_cast<size_t>(cookie) - 1;
if (which < mAssetPaths.size()) {
return mAssetPaths[which].path;
}
return String8();
}
void AssetManager::setLocaleLocked(const char* locale)
{
if (mLocale != NULL) {
delete[] mLocale;
}
mLocale = strdupNew(locale);
updateResourceParamsLocked();
}
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[RESTABLE_MAX_LOCALE_LEN];
config.getBcp47Locale(spec);
setLocaleLocked(spec);
} else {
updateResourceParamsLocked();
}
}
void AssetManager::getConfiguration(ResTable_config* outConfig) const
{
AutoMutex _l(mLock);
*outConfig = *mConfig;
}
/*
* Open an asset.
*
* The data could be in any asset path. Each asset path could be:
* - A directory on disk.
* - A Zip archive, uncompressed or compressed.
*
* If the file is in a directory, it could have a .gz suffix, meaning it is compressed.
*
* 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");
String8 assetName(kAssetsRoot);
appendPath(assetName, 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.c_str(), mAssetPaths.itemAt(i).path.c_str());
Asset* pAsset = openNonAssetInPathLocked(assetName.c_str(), mode,
mAssetPaths.editItemAt(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, int32_t* outCookie)
{
AutoMutex _l(mLock);
LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager");
/*
* 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.c_str());
Asset* pAsset = openNonAssetInPathLocked(
fileName, mode, mAssetPaths.editItemAt(i));
if (pAsset != NULL) {
if (outCookie != NULL) *outCookie = static_cast<int32_t>(i + 1);
return pAsset != kExcludedAsset ? pAsset : NULL;
}
}
return NULL;
}
Asset* AssetManager::openNonAsset(const int32_t cookie, const char* fileName, AccessMode mode)
{
const size_t which = static_cast<size_t>(cookie) - 1;
AutoMutex _l(mLock);
LOG_FATAL_IF(mAssetPaths.size() == 0, "No assets added to AssetManager");
if (which < mAssetPaths.size()) {
ALOGV("Looking for non-asset '%s' in '%s'\n", fileName,
mAssetPaths.itemAt(which).path.c_str());
Asset* pAsset = openNonAssetInPathLocked(
fileName, mode, mAssetPaths.editItemAt(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;
}
}
bool AssetManager::appendPathToResTable(asset_path& ap, bool appAsLib) const {
// skip those ap's that correspond to system overlays
if (ap.isSystemOverlay) {
return true;
}
Asset* ass = NULL;
ResTable* sharedRes = NULL;
bool shared = true;
bool onlyEmptyResources = true;
ATRACE_NAME(ap.path.c_str());
Asset* idmap = openIdmapLocked(ap);
size_t nextEntryIdx = mResources->getTableCount();
ALOGV("Looking for resource asset in '%s'\n", ap.path.c_str());
if (ap.type != kFileTypeDirectory && ap.rawFd < 0) {
if (nextEntryIdx == 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) {
// skip ahead the number of system overlay packages preloaded
nextEntryIdx = sharedRes->getTableCount();
}
}
if (sharedRes == NULL) {
ass = const_cast<AssetManager*>(this)->
mZipSet.getZipResourceTableAsset(ap.path);
if (ass == NULL) {
ALOGV("loading resource table %s\n", ap.path.c_str());
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 (nextEntryIdx == 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.c_str());
sharedRes = new ResTable();
sharedRes->add(ass, idmap, nextEntryIdx + 1, false);
#ifdef __ANDROID__
const char* data = getenv("ANDROID_DATA");
LOG_ALWAYS_FATAL_IF(data == NULL, "ANDROID_DATA not set");
String8 overlaysListPath(data);
appendPath(overlaysListPath, kResourceCache);
appendPath(overlaysListPath, "overlays.list");
addSystemOverlays(overlaysListPath.c_str(), ap.path, sharedRes, nextEntryIdx);
#endif
sharedRes = const_cast<AssetManager*>(this)->
mZipSet.setZipResourceTable(ap.path, sharedRes);
}
}
} else {
ALOGV("loading resource table %s\n", ap.path.c_str());
ass = const_cast<AssetManager*>(this)->
openNonAssetInPathLocked("resources.arsc",
Asset::ACCESS_BUFFER,
ap);
shared = false;
}
if ((ass != NULL || sharedRes != NULL) && ass != kExcludedAsset) {
ALOGV("Installing resource asset %p in to table %p\n", ass, mResources);
if (sharedRes != NULL) {
ALOGV("Copying existing resources for %s", ap.path.c_str());
mResources->add(sharedRes, ap.isSystemAsset);
} else {
ALOGV("Parsing resources for %s", ap.path.c_str());
mResources->add(ass, idmap, nextEntryIdx + 1, !shared, appAsLib, ap.isSystemAsset);
}
onlyEmptyResources = false;
if (!shared) {
delete ass;
}
} else {
ALOGV("Installing empty resources in to table %p\n", mResources);
mResources->addEmpty(nextEntryIdx + 1);
}
if (idmap != NULL) {
delete idmap;
}
return onlyEmptyResources;
}
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");
}
mResources = new ResTable();
updateResourceParamsLocked();
bool onlyEmptyResources = true;
const size_t N = mAssetPaths.size();
for (size_t i=0; i<N; i++) {
bool empty = appendPathToResTable(
const_cast<AssetManager*>(this)->mAssetPaths.editItemAt(i));
onlyEmptyResources = onlyEmptyResources && empty;
}
if (required && onlyEmptyResources) {
ALOGW("Unable to find resources file resources.arsc");
delete mResources;
mResources = NULL;
}
return mResources;
}
void AssetManager::updateResourceParamsLocked() const
{
ATRACE_CALL();
ResTable* res = mResources;
if (!res) {
return;
}
if (mLocale) {
mConfig->setBcp47Locale(mLocale);
} else {
mConfig->clearLocale();
}
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.c_str());
} else {
ALOGW("failed to load idmap %s\n", ap.idmap.c_str());
}
}
return ass;
}
void AssetManager::addSystemOverlays(const char* pathOverlaysList,
const String8& targetPackagePath, ResTable* sharedRes, size_t offset) const
{
FILE* fin = fopen(pathOverlaysList, "r");
if (fin == NULL) {
return;
}
#ifndef _WIN32
if (TEMP_FAILURE_RETRY(flock(fileno(fin), LOCK_SH)) != 0) {
fclose(fin);
return;
}
#endif
char buf[1024];
while (fgets(buf, sizeof(buf), fin)) {
// format of each line:
// <path to apk><space><path to idmap><newline>
char* space = strchr(buf, ' ');
char* newline = strchr(buf, '\n');
asset_path oap;
if (space == NULL || newline == NULL || newline < space) {
continue;
}
oap.path = String8(buf, space - buf);
oap.type = kFileTypeRegular;
oap.idmap = String8(space + 1, newline - space - 1);
oap.isSystemOverlay = true;
Asset* oass = const_cast<AssetManager*>(this)->
openNonAssetInPathLocked("resources.arsc",
Asset::ACCESS_BUFFER,
oap);
if (oass != NULL) {
Asset* oidmap = openIdmapLocked(oap);
offset++;
sharedRes->add(oass, oidmap, offset + 1, false);
const_cast<AssetManager*>(this)->mAssetPaths.add(oap);
const_cast<AssetManager*>(this)->mZipSet.addOverlay(targetPackagePath, oap);
delete oidmap;
}
}
#ifndef _WIN32
TEMP_FAILURE_RETRY(flock(fileno(fin), LOCK_UN));
#endif
fclose(fin);
}
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, bool includeSystemLocales) const
{
ResTable* res = mResources;
if (res != NULL) {
res->getLocales(locales, includeSystemLocales, true /* mergeEquivalentLangs */);
}
}
/*
* 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,
asset_path& ap)
{
Asset* pAsset = NULL;
ALOGV("openNonAssetInPath: name=%s type=%d fd=%d", fileName, ap.type, ap.rawFd);
/* look at the filesystem on disk */
if (ap.type == kFileTypeDirectory) {
String8 path(ap.path);
appendPath(path, fileName);
pAsset = openAssetFromFileLocked(path, mode);
if (pAsset == NULL) {
/* try again, this time with ".gz" */
path.append(".gz");
pAsset = openAssetFromFileLocked(path, mode);
}
if (pAsset != NULL) {
ALOGV("FOUND NA '%s' on disk", fileName);
pAsset->setAssetSource(path);
}
/* look inside the zip file */
} else {
String8 path(fileName);
/* check the appropriate Zip file */
ZipFileRO* pZip = getZipFileLocked(ap);
if (pZip != NULL) {
ALOGV("GOT zip, checking NA '%s'", path.c_str());
ZipEntryRO entry = pZip->findEntryByName(path.c_str());
if (entry != NULL) {
ALOGV("FOUND NA in Zip file for %s", path.c_str());
pAsset = openAssetFromZipLocked(pZip, entry, mode, path);
pZip->releaseEntry(entry);
}
}
if (pAsset != NULL) {
/* create a "source" name, for debug/display */
pAsset->setAssetSource(
createZipSourceNameLocked(ZipSet::getPathName(ap.path.c_str()), 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) {
appendPath(sourceName, dirName);
}
appendPath(sourceName, fileName);
return sourceName;
}
/*
* 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) appendPath(path, rootDir);
return path;
}
/*
* Return a pointer to one of our open Zip archives. Returns NULL if no
* matching Zip file exists.
*/
ZipFileRO* AssetManager::getZipFileLocked(asset_path& ap)
{
ALOGV("getZipFileLocked() in %p: ap=%p zip=%p", this, &ap, ap.zip.get());
if (ap.zip != NULL) {
return ap.zip->getZip();
}
if (ap.rawFd < 0) {
ALOGV("getZipFileLocked: Creating new zip from path %s", ap.path.c_str());
ap.zip = mZipSet.getSharedZip(ap.path);
} else {
ALOGV("getZipFileLocked: Creating new zip from fd %d", ap.rawFd);
ap.zip = SharedZip::create(ap.rawFd, ap.path);
}
return ap.zip != NULL ? ap.zip->getZip() : NULL;
}
/*
* 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(getPathExtension(pathName).c_str(), ".gz") == 0) {
//printf("TRYING '%s'\n", (const char*) pathName);
pAsset = Asset::createFromCompressedFile(pathName.c_str(), mode);
} else {
//printf("TRYING '%s'\n", (const char*) pathName);
pAsset = Asset::createFromFile(pathName.c_str(), 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)
{
std::unique_ptr<Asset> pAsset;
// TODO: look for previously-created shared memory slice?
uint16_t method;
uint32_t uncompressedLen;
//printf("USING Zip '%s'\n", pEntry->getFileName());
if (!pZipFile->getEntryInfo(entry, &method, &uncompressedLen, NULL, NULL,
NULL, NULL))
{
ALOGW("getEntryInfo failed\n");
return NULL;
}
std::optional<incfs::IncFsFileMap> dataMap = pZipFile->createEntryIncFsFileMap(entry);
if (!dataMap.has_value()) {
ALOGW("create map from entry failed\n");
return NULL;
}
if (method == ZipFileRO::kCompressStored) {
pAsset = Asset::createFromUncompressedMap(std::move(*dataMap), mode);
ALOGV("Opened uncompressed entry %s in zip %s mode %d: %p", entryName.c_str(),
dataMap->file_name(), mode, pAsset.get());
} else {
pAsset = Asset::createFromCompressedMap(std::move(*dataMap),
static_cast<size_t>(uncompressedLen), mode);
ALOGV("Opened compressed entry %s in zip %s mode %d: %p", entryName.c_str(),
dataMap->file_name(), mode, pAsset.get());
}
if (pAsset == NULL) {
/* unexpected */
ALOGW("create from segment failed\n");
}
return pAsset.release();
}
/*
* Open a directory in the asset namespace.
*
* An "asset directory" is simply the combination of all asset paths' "assets/" directories.
*
* 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);
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.c_str());
scanAndMergeZipLocked(pMergedInfo, ap, kAssetsRoot, dirName);
} else {
ALOGV("Adding directory %s from dir %s", dirName, ap.path.c_str());
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 asset paths' "assets/" directories.
*
* Pass in "" for the root dir.
*/
AssetDir* AssetManager::openNonAssetDir(const int32_t 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);
pDir = new AssetDir;
pMergedInfo = new SortedVector<AssetDir::FileInfo>;
const size_t which = static_cast<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.c_str());
scanAndMergeZipLocked(pMergedInfo, ap, NULL, dirName);
} else {
ALOGV("Adding directory %s from dir %s", dirName, ap.path.c_str());
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)
{
assert(pMergedInfo != NULL);
//printf("scanAndMergeDir: %s %s %s\n", ap.path.c_str(), rootDir, dirName);
String8 path = createPathNameLocked(ap, rootDir);
if (dirName[0] != '\0') appendPath(path, dirName);
SortedVector<AssetDir::FileInfo>* 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().c_str();
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().c_str(),
pMergedInfo->itemAt(matchIdx).getSourceName().c_str());
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.c_str());
dir = opendir(path.c_str());
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(appendPathCopy(path, entry->d_name).c_str());
#endif
if (fileType != kFileTypeRegular && fileType != kFileTypeDirectory)
continue;
AssetDir::FileInfo info;
info.set(String8(entry->d_name), fileType);
if (strcasecmp(getPathExtension(info.getFileName()).c_str(), ".gz") == 0)
info.setFileName(getBasePath(info.getFileName()));
info.setSourceName(appendPathCopy(path, 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.c_str());
return false;
}
zipName = ZipSet::getPathName(ap.path.c_str());
/* convert "sounds" to "rootDir/sounds" */
if (rootDir != NULL) dirName = rootDir;
appendPath(dirName, 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();
void *iterationCookie;
if (!pZip->startIteration(&iterationCookie, dirName.c_str(), NULL)) {
ALOGW("ZipFileRO::startIteration returned false");
return false;
}
ZipEntryRO entry;
while ((entry = pZip->nextEntry(iterationCookie)) != NULL) {
char nameBuf[256];
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.c_str());
if (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(getPathLeaf(String8(nameBuf)), kFileTypeRegular);
info.setSourceName(
createZipSourceNameLocked(zipName, dirName, info.getFileName()));
contents.add(info);
//printf("FOUND: file '%s'\n", info.getFileName().c_str());
} 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.c_str());
}
}
}
pZip->endIteration(iterationCookie);
/*
* 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
}
/*
* ===========================================================================
* 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)
{
if (kIsDebug) {
ALOGI("Creating SharedZip %p %s\n", this, mPath.c_str());
}
ALOGV("+++ opening zip '%s'\n", mPath.c_str());
mZipFile = ZipFileRO::open(mPath.c_str());
if (mZipFile == NULL) {
ALOGD("failed to open Zip archive '%s'\n", mPath.c_str());
}
}
AssetManager::SharedZip::SharedZip(int fd, const String8& path)
: mPath(path), mZipFile(NULL), mModWhen(0),
mResourceTableAsset(NULL), mResourceTable(NULL)
{
if (kIsDebug) {
ALOGI("Creating SharedZip %p fd=%d %s\n", this, fd, mPath.c_str());
}
ALOGV("+++ opening zip fd=%d '%s'\n", fd, mPath.c_str());
mZipFile = ZipFileRO::openFd(fd, mPath.c_str());
if (mZipFile == NULL) {
::close(fd);
ALOGD("failed to open Zip archive fd=%d '%s'\n", fd, mPath.c_str());
}
}
sp<AssetManager::SharedZip> AssetManager::SharedZip::get(const String8& path,
bool createIfNotPresent)
{
AutoMutex _l(gLock);
time_t modWhen = getFileModDate(path.c_str());
sp<SharedZip> zip = gOpen.valueFor(path).promote();
if (zip != NULL && zip->mModWhen == modWhen) {
return zip;
}
if (zip == NULL && !createIfNotPresent) {
return NULL;
}
zip = new SharedZip(path, modWhen);
gOpen.add(path, zip);
return zip;
}
sp<AssetManager::SharedZip> AssetManager::SharedZip::create(int fd, const String8& path)
{
return new SharedZip(fd, path);
}
ZipFileRO* AssetManager::SharedZip::getZip()
{
return mZipFile;
}
Asset* AssetManager::SharedZip::getResourceTableAsset()
{
AutoMutex _l(gLock);
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) {
// This is not thread safe the first time it is called, so
// do it here with the global lock held.
asset->getBuffer(true);
mResourceTableAsset = asset;
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.c_str());
return mModWhen == modWhen;
}
void AssetManager::SharedZip::addOverlay(const asset_path& ap)
{
mOverlays.add(ap);
}
bool AssetManager::SharedZip::getOverlay(size_t idx, asset_path* out) const
{
if (idx >= mOverlays.size()) {
return false;
}
*out = mOverlays[idx];
return true;
}
AssetManager::SharedZip::~SharedZip()
{
if (kIsDebug) {
ALOGI("Destroying SharedZip %p %s\n", this, mPath.c_str());
}
if (mResourceTable != NULL) {
delete mResourceTable;
}
if (mResourceTableAsset != NULL) {
delete mResourceTableAsset;
}
if (mZipFile != NULL) {
delete mZipFile;
ALOGV("Closed '%s'\n", mPath.c_str());
}
}
/*
* ===========================================================================
* AssetManager::ZipSet
* ===========================================================================
*/
/*
* 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)
{
return getSharedZip(path)->getZip();
}
const sp<AssetManager::SharedZip> AssetManager::ZipSet::getSharedZip(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;
}
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;
}
void AssetManager::ZipSet::addOverlay(const String8& path, const asset_path& overlay)
{
int idx = getIndex(path);
sp<SharedZip> zip = mZipFile[idx];
zip->addOverlay(overlay);
}
bool AssetManager::ZipSet::getOverlay(const String8& path, size_t idx, asset_path* out) const
{
sp<SharedZip> zip = SharedZip::get(path, false);
if (zip == NULL) {
return false;
}
return zip->getOverlay(idx, out);
}
/*
* 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;
}